general cleanups and mounted guards

The Riverpod bug preventing us from doing this has been fixed.

.github/workflows/android.yml

@@ -1,39 +1,39 @@
 name: "Build APK"
 
 on:
-  push:
-    branches: ["main"]
-    tags: ["*"]
-  workflow_dispatch:
+    push:
+        branches: ["main"]
+        tags: ["*"]
+    workflow_dispatch:
 
 jobs:
-  build-apk:
-    runs-on: ubuntu-latest
+    build-apk:
+        runs-on: ubuntu-latest
 
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v6
-        with:
-          submodules: recursive
+        steps:
+            - name: Checkout repository
+              uses: actions/checkout@v6
+              with:
+                  submodules: recursive
 
-      - name: Lix GHA Installer Action
-        uses: samueldr/lix-gha-installer-action@v2026-02-22
-        with:
-          extra_nix_config: experimental-features = nix-command flakes flake-self-attrs
+            - name: Lix GHA Installer Action
+              uses: samueldr/lix-gha-installer-action@v2026-02-22
+              with:
+                  extra_nix_config: experimental-features = nix-command flakes flake-self-attrs
 
-      - name: Decode keystore
-        run: echo "$KEYSTORE_CONTENT" | base64 --decode > keystore.jks
-        env:
-          KEYSTORE_CONTENT: ${{ secrets.KEYSTORE_CONTENT }}
+            - name: Decode keystore
+              run: echo "$KEYSTORE_CONTENT" | base64 --decode > keystore.jks
+              env:
+                  KEYSTORE_CONTENT: ${{ secrets.KEYSTORE_CONTENT }}
 
-      - name: Build app
-        run: nix develop --command bash -c "flutter pub get && dart scripts/generate.dart && flutter pub run build_runner build && flutter build apk --target-platform android-arm64"
-        env:
-          KEYSTORE_PATH: ../../keystore.jks
-          KEYSTORE_PASSWORD: ${{ secrets.KEYSTORE_PASSWORD }}
+            - name: Build app
+              run: nix develop --command bash -c "flutter pub get && dart scripts/generate.dart && flutter pub run build_runner build && flutter build apk --target-platform android-arm64 --split-per-abi --dart-define=GIT_COMMIT=${{ github.sha }}"
+              env:
+                  KEYSTORE_PATH: ../../keystore.jks
+                  KEYSTORE_PASSWORD: ${{ secrets.KEYSTORE_PASSWORD }}
 
-      - name: Upload installer artifact
-        uses: actions/upload-artifact@v6
-        with:
-          name: APK
-          path: build/app/outputs/flutter-apk/app-release.apk
+            - name: Upload installer artifact
+              uses: actions/upload-artifact@v6
+              with:
+                  name: APK
+                  path: build/app/outputs/flutter-apk/app-arm64-v8a-release.apk

.github/workflows/flatpak.yml

@@ -1,37 +1,73 @@
 name: "Build Flatpaks"
 
 on:
-  push:
-    branches: ["main"]
-    tags: ["*"]
-  workflow_dispatch:
+    push:
+        branches: ["main"]
+        tags: ["*"]
+    workflow_dispatch:
 
 jobs:
-  build-flatpak:
-    strategy:
-      fail-fast: false
-      matrix:
-        include:
-          - arch: x86_64
-            runner: ubuntu-latest
-          - arch: aarch64
-            runner: ubuntu-24.04-arm
-    runs-on: ${{ matrix.runner }}
+    build-flatpak:
+        strategy:
+            fail-fast: false
+            matrix:
+                include:
+                    - arch: x86_64
+                      runner: ubuntu-latest
+                    - arch: aarch64
+                      runner: ubuntu-24.04-arm
+        runs-on: ${{ matrix.runner }}
 
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v6
+        steps:
+            - name: Checkout repository
+              uses: actions/checkout@v6
 
-      - name: Lix GHA Installer Action
-        uses: samueldr/lix-gha-installer-action@v2026-02-22
-        with:
-          extra_nix_config: experimental-features = nix-command flakes flake-self-attrs
+            - name: Lix GHA Installer Action
+              uses: samueldr/lix-gha-installer-action@v2026-02-22
+              with:
+                  extra_nix_config: experimental-features = nix-command flakes flake-self-attrs
 
-      - name: Build app
-        run: nix build .#flatpak
+            - name: Build app
+              run: nix build .#flatpak
 
-      - name: Upload installer artifact
-        uses: actions/upload-artifact@v6
-        with:
-          name: flatpak-${{ matrix.arch }}
-          path: result/nexus.federated.nexus.flatpak
+            - name: Upload installer artifact
+              uses: actions/upload-artifact@v6
+              with:
+                  name: flatpak-${{ matrix.arch }}
+                  path: result/nexus.federated.nexus.flatpak
+
+    publish:
+        needs: build-flatpak
+        if: github.ref == 'refs/heads/main'
+        runs-on: ubuntu-latest
+        permissions:
+            pages: write
+            id-token: write
+        environment:
+            name: github-pages
+            url: ${{ steps.deployment.outputs.page_url }}
+        steps:
+            - name: Install flatpak tooling
+              run: sudo apt-get update && sudo apt-get install -y flatpak ostree
+
+            - name: Download bundles
+              uses: actions/download-artifact@v7
+              with:
+                  pattern: flatpak-*
+                  path: bundles
+
+            - name: Build OSTree repo
+              run: |
+                  ostree init --repo=repo --mode=archive-z2
+                  for bundle in bundles/*/nexus.federated.nexus.flatpak; do
+                    flatpak build-import-bundle repo "$bundle"
+                  done
+                  flatpak build-update-repo --prune repo
+
+            - uses: actions/upload-pages-artifact@v4
+              with:
+                  path: repo
+
+            - name: Deploy to Pages
+              id: deployment
+              uses: actions/deploy-pages@v4

.github/workflows/ios.yml

@@ -19,7 +19,7 @@ jobs:
             - name: Set up Flutter
               uses: subosito/flutter-action@v2
               with:
-                  flutter-version: 3.47.0
+                  flutter-version: 3.47.4
 
             - name: Set up Go
               uses: actions/setup-go@v6
@@ -31,7 +31,7 @@ jobs:
                   flutter pub get
                   dart scripts/generate.dart
                   flutter pub run build_runner build
-                  flutter build ios --release --no-codesign
+                  flutter build ios --no-codesign --dart-define=GIT_COMMIT=${{ github.sha }}
 
             # Unsigned IPA: SideStore/AltStore re-sign this on-device with the
             # user's own Apple ID at install time, so no certificate is needed here.

.github/workflows/macos.yml

@@ -19,7 +19,7 @@ jobs:
             - name: Set up Flutter
               uses: subosito/flutter-action@v2
               with:
-                  flutter-version: 3.47.0
+                  flutter-version: 3.47.4
 
             - name: Set up Go
               uses: actions/setup-go@v6
@@ -31,7 +31,7 @@ jobs:
                   flutter pub get
                   dart scripts/generate.dart
                   flutter pub run build_runner build
-                  flutter build macos --release
+                  flutter build macos --dart-define=GIT_COMMIT=${{ github.sha }}
 
             - name: Create DMG
               id: create-dmg

.github/workflows/windows.yml

@@ -19,7 +19,7 @@ jobs:
             - name: Set up Flutter
               uses: subosito/flutter-action@v2
               with:
-                  flutter-version: 3.47.0
+                  flutter-version: 3.47.4
 
             - name: Set up Go
               uses: actions/setup-go@v6
@@ -29,7 +29,7 @@ jobs:
             - name: Setup MSYS2
               uses: msys2/setup-msys2@v2
               with:
-                  msystem: MINGW64
+                  msystem: CLANG64
                   install: >-
                       mingw-w64-x86_64-gcc
 
@@ -43,7 +43,7 @@ jobs:
                   flutter pub get
                   dart scripts/generate.dart
                   flutter pub run build_runner build
-                  flutter build windows --release
+                  flutter build windows --dart-define=GIT_COMMIT=${{ github.sha }}
 
             - name: Copy MinGW runtime DLLs
               shell: msys2 {0}
@@ -52,6 +52,15 @@ jobs:
                   cp /mingw64/bin/libwinpthread-1.dll build/windows/x64/runner/Release/
                   cp /mingw64/bin/libstdc++-6.dll build/windows/x64/runner/Release/
 
+            - name: Copy MSVC runtime DLLs
+              shell: powershell
+              run: |
+                  $release = "build/windows/x64/runner/Release"
+
+                  Copy-Item C:\Windows\System32\MSVCP140.dll $release -Force
+                  Copy-Item C:\Windows\System32\VCRUNTIME140.dll $release -Force
+                  Copy-Item C:\Windows\System32\VCRUNTIME140_1.dll $release -Force
+
             - name: Install Inno Setup
               run: choco install innosetup -y
 

.gitignore

@@ -42,3 +42,5 @@ password.txt
 
 # Nix
 /result
+# Widget Preview related
+.widget_preview/

.gitmodules

@@ -1,4 +1,3 @@
 [submodule "gomuks"]
 	path = gomuks
 	url = https://github.com/gomuks/gomuks
-	branch = main

.vscode/launch.json

@@ -0,0 +1,17 @@
+{
+    "configurations": [
+        {
+            "name": "Flutter",
+            "type": "dart",
+            "request": "launch",
+            "program": "lib/main.dart"
+        },
+        {
+            "name": "Flutter (Headless)",
+            "type": "dart",
+            "request": "launch",
+            "program": "lib/main.dart",
+            "env": { "FLUTTER_HEADLESS": "1" }
+        }
+    ]
+}

.vscode/settings.json

@@ -10,7 +10,10 @@
         "msgtype",
         "muks",
         "prefs",
+        "recents",
         "unban",
-        "unredact"
+        "unifiedpush",
+        "unredact",
+        "webpush"
     ]
 }

DEVELOPMENT.md

@@ -21,28 +21,32 @@ See [Effective Dart: Style](https://dart.dev/effective-dart/style) for general r
 Controllers live in `lib/controllers/` and provide a source that exposes data and logic via Riverpod providers, allowing other parts of the code to watch state changes with ref.watch (`ref.watch(MyController.provider)`), access the current value with ref.read (`ref.read(MyController.provider)`), and run helper methods on those classes using the notifier:
 
 ```dart
-ref.watch(MyController.provider.notifier).helperMethod()
+ref.read(MyController.provider.notifier).helperMethod()
 ```
 
 We use an object oriented style for controllers, where `provider` is a static member on the controller class. E.g.
 
 ```dart
-class MyController extends AsyncNotifier<DataThisControllerExposes> {
-  final SomeInputType input;
-  MyController(this.input);
-
+class MyController(final SomeInputType input)
+    extends AsyncNotifier<DataThisControllerExposes> {
   @override
   Future<DataThisControllerExposes> build() async {
     return input.foo;
   }
 
   static final provider =
-	AsyncNotifierProvider.family<MyController, DataThisControllerExposes, SomeInputType>(
-	  AuthorController.new,
-	);
+      AsyncNotifierProvider.family<MyController, DataThisControllerExposes, SomeInputType>(
+        MyController.new,
+      );
 }
 ```
 
+#### `watch` vs `read`
+
+Only use `ref.watch` in a `build` method, where you want to rebuild when the value changes. Everywhere else, like callbacks, `useEffect`, and methods on a controller, use `ref.read`.
+
+Use `.select` to narrow down what you depend on, e.g. `ref.watch(RoomsController.provider.select((rooms) => rooms[roomId]))`.
+
 Providers which are not controllers, e.g. they expose no data, only methods, should instead live in `lib/helpers/`. For an example, see `lib/helpers/launch_helper.dart`. Other, non-provider helpers, like extensions or helper methods can also go in `lib/helpers/`.
 
 ### Don't use StatefulWidgets ([Flutter Hooks](https://pub.dev/packages/flutter_hooks))
@@ -61,6 +65,36 @@ When possible, use immutable collections instead of the mutable equivalent. For
 
 When possible, we prefer not to create global variables or methods. You can usually replace a global variable with a Riverpod controller, and a global method with an extension method.
 
+I'm also not a big fan of unneeded private methods or variables, but this is contextual.
+
+### Modern Dart syntax
+
+We try to use newer Dart language features where they make code shorter:
+
+- Primary constructors for classes, including widgets, e.g. `class const MemberList(final String roomId, {super.key}) extends HookConsumerWidget`.
+- Dot shorthands wherever the type can be inferred, e.g. `.new(...)`, `padding: .all(8)`, `relationType == .reply`.
+- Patterns and switch expressions over null checks and casts, e.g. `if (event.content case MessageContent(:final body?))` rather than checking `is` then using `!`.
+
+### Prefer `map` over inline `for` loops
+
+When building a list (or set, or map) from another collection, use `.map`, `.expand` and friends rather than a `for` inside the collection literal:
+
+```dart
+// Prefer
+children: rooms.map((room) => RoomTile(room)).toList(),
+
+// Over
+children: [for (final room in rooms) RoomTile(room)],
+```
+
+Regular `for` statements are fine for logic that doesn't just build a collection.
+
+### Async values and errors
+
+When rendering an `AsyncValue`, use the `betterWhen` extension, which shows our standard loading and error widgets, or a switch expression if you need more control (e.g. `AsyncData(:final value) || AsyncLoading(:final value?)` to keep showing old data while reloading).
+
+For futures started from the UI that nothing awaits, like button presses, add `.onError(showError)` so failures are shown to the user instead of being lost.
+
 ## LLM/AI Assisted Contributions
 
 LLM generated code is NOT allowed. All contributions should be written by humans. Using LLMs for interacting with others, e.g. for Comments, PRs, etc, is also not allowed.

README.md

@@ -1,8 +1,5 @@
 # Nexus Client
 
-> [!WARNING]
-> Nexus Client is still in development, and doesn't support everything needed for daily use.
-
 ## Description
 
 A simple and user-friendly Matrix client made with Flutter and a Gomuks backend.
@@ -13,115 +10,63 @@ A simple and user-friendly Matrix client made with Flutter and a Gomuks backend.
 | :--------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | :------------------------------------------------------------------------------: |
 | ![Screenshot of Nexus Client in dark mode, showing users talking, with a sidebar showing rooms and spaces, and another sidebar showing members](./assets/screenshotDark.png) | ![The same screenshot as above, but in light mode](./assets/screenshotLight.png) |
 
-## Progress
-
-- [x] Platform Support
-    - [x] Linux
-    - [x] Windows - Currently has some bugs, due to us not having any developers on Windows. If you want to fix these, get in contact with us though the [Nexus Client Matrix room](https://matrix.to/#/#nexus:federated.nexus).
-    - [x] Android
-    - [x] MacOS - Unsigned .dmg only
-    - [x] iOS - Unsigned .ipa only
-    - [ ] Web (may not be possible)
-- [x] Login (via OAuth)
-- [x] Rooms / Spaces
-    - [x] Displaying and choosing
-    - [x] Reading, showing unread
-        - [x] Mark as read button on rooms and spaces
-    - [ ] Searching
-    - [ ] Creating (Rooms, Spaces, and DMs)
-    - [x] Joining
-        - [x] Parse vias
-        - [x] Using a text/uri/link
-            - [x] Plain text
-            - [x] `matrix:` Uri
-            - [x] Matrix.to link
-        - [ ] From space
-        - [ ] From directory
-    - [x] Leaving
-    - [x] Subspaces
-- [x] Messages
-    - [x] Encryption
-        - [x] Restoring crypto identity from a recovery passphrase/key
-    - [x] Sending
-        - [x] Plain text
-        - [x] HTML/Markdown
-        - [x] Replies
-            - [x] Choose ping on/off
-        - [x] Per message profiles
-        - [x] Attachments
-        - [ ] Commands with [MSC4391](https://github.com/matrix-org/matrix-spec-proposals/pull/4391)
-        - [x] Mentions
-            - [x] Users
-            - [x] Rooms
-            - [ ] Inline emoji picker (Putting this here since it'll be implemented the same way as mentions)
-        - [ ] Custom emojis/stickers
-        - [ ] GIFs using Gomuks' GIF proxies
-    - [x] Receiving
-        - [x] Plain text
-        - [x] Per message profiles
-        - [x] HTML
-        - [x] URL Previews
-        - [x] Replies
-            - [x] Viewing
-            - [ ] Jump to original message
-                - [x] In loaded timeline
-                - [ ] Out of loaded timeline
-        - [x] Edits
-        - [x] Attachments
-            - [x] Unencrypted
-            - [x] Encrypted
-            - [x] Blurhashing
-            - [ ] Downloading attachments
-            - [x] Opening attachments in their own view
-        - [ ] Polls
-        - [x] Mentions
-            - [x] Users
-                - [x] Clickable
-            - [x] Rooms
-                - [ ] Clickable
-                - [x] Matrix URIs
-                - [x] Matrix.to links
-            - [x] Events
-                - [ ] Render more nicely
-                - [ ] Clickable
-        - [x] Custom emojis/stickers
-        - [x] History loading
-    - [x] Editing
-    - [x] Deleting
-- [x] Reactions
-- [x] Pins
-    - [x] Displaying
-    - [x] Pinning/Unpinning
-- [ ] Threads
-- [x] Profile popouts
-    - [x] Working actions
-- [x] Copy link to:
-    - [x] Room
-    - [x] Space
-    - [x] Message
-- [ ] Reporting
-    - [x] Events
-    - [ ] Rooms
-- [x] Member list
-    - [x] Sort by power level
-    - [ ] Colors based off of power level
-- [ ] Notifications using UnifiedPush ([#35](https://git.federated.nexus/Nexus/nexus/issues/35))
-- [ ] Group calls using [MSC4195](https://github.com/matrix-org/matrix-spec-proposals/pull/4195)
-- [ ] Invites
-- [x] Settings
-
 ## Try it out
 
-If you want to try out Nexus, grab one of the following artifacts from CI:
+If you want to try out Nexus, download the [latest release](https://git.federated.nexus/Nexus/nexus/releases/latest).
+
+### Nightly Builds
+
+For the newest changes, grab one of the following nightly artifacts, built by CI from the latest commit on `main`.
 
 - [Android APK](https://nightly.link/Henry-Hiles/nexus/workflows/android/main/APK.zip)
-- [Windows EXE](https://nightly.link/Henry-Hiles/nexus/workflows/windows/main/windows-installer.zip)
 - [Unsigned iOS IPA](https://nightly.link/Henry-Hiles/nexus/workflows/ios/main/Nexus.ipa.zip)
 - [Unsigned MacOS DMG](https://nightly.link/Henry-Hiles/nexus/workflows/macos/main/nexus.dmg.zip)
 - [Windows EXE](https://nightly.link/Henry-Hiles/nexus/workflows/windows/main/windows-installer.zip)
-- Flatpak
-    - [AArch64/Arm64](https://nightly.link/Henry-Hiles/nexus/workflows/flatpak/main/flatpak-aarch64.zip)
-    - [x86_64/AMD64](https://nightly.link/Henry-Hiles/nexus/workflows/flatpak/main/flatpak-x86_64.zip)
+
+Or, use one of the below methods:
+
+### Nightly Flatpak Repo
+
+Make sure Flatpak is set up on your system, then run:
+
+```bash
+flatpak install --user https://nexus.federated.nexus/flatpak/nexus.flatpakref
+```
+
+This adds the Nexus remote and installs the app for your user only, so no root access is needed (x86_64 and aarch64 are supported). To install system-wide instead, use `--system` in place of `--user`. Updates arrive through `flatpak update` or your software center.
+
+### NixOS Module
+
+Add Nexus as a flake input, following `nixpkgs` for less fetches:
+
+```nix
+nexus = {
+  url = "git+https://git.federated.nexus/Nexus/nexus";
+  inputs.nixpkgs.follows = "nixpkgs";
+};
+```
+
+This tracks the latest commit on `main`. To stay on a release instead, pin the input to its tag:
+
+```nix
+url = "git+https://git.federated.nexus/Nexus/nexus?ref=refs/tags/v1.0.0";
+```
+
+Then import the module and enable it in your NixOS configuration:
+
+```nix
+{ inputs, ... }:
+{
+  imports = [ inputs.nexus.nixosModules.default ];
+
+  programs.nexus = {
+    enable = true;
+    enableNotifications = true; # optional: push notifications via UnifiedPush
+  };
+}
+```
+
+This installs Nexus system-wide. With `enableNotifications`, it also installs KUnifiedPush and registers its systemd and D-Bus services so notifications work. The `package` option lets you override the package if you need to.
 
 ## Build it yourself
 
@@ -129,7 +74,7 @@ If you want to try out Nexus, grab one of the following artifacts from CI:
 
 #### Linux
 
-- On NixOS: Either use direnv and `direnv allow`, or `nix flake develop`
+- On NixOS: Either use direnv and `direnv allow`, or `nix develop`
 - On other distros: Install Flutter, Go, Git, Libclang, Libass, MPV, and Glibc. Do not use any Snap packages, they cause various compilation issues.
 
 #### Windows
@@ -208,7 +153,7 @@ Development instructions can be found in [DEVELOPMENT.md](./DEVELOPMENT.md).
 
 Join the [Nexus Client Matrix room](https://matrix.to/#/#nexus:federated.nexus) for questions or help with developing or using Nexus Client.
 
-# Credits
+## Credits
 
 Thank you Hylke Bons (https://planetpeanut.studio) for making the amazing icon for Nexus!
 Thank you Tulir Asokan for making [Gomuks](https://github.com/gomuks/gomuks), and helping us integrate it into Nexus!

altstore-source.json

@@ -1,22 +0,0 @@
-{
-  "name": "Nexus",
-  "identifier": "nexus.federated.nexus.source",
-  "subtitle": "Nexus for iOS",
-  "description": "Nexus iOS builds for AltStore and SideStore.",
-  "iconURL": "https://git.federated.nexus/Nexus/nexus/raw/branch/main/assets/icon.png",
-  "website": "https://git.federated.nexus/Nexus/nexus",
-  "apps": [
-    {
-      "name": "Nexus",
-      "bundleIdentifier": "nexus.federated.nexus",
-      "developerName": "Nexus",
-      "subtitle": "A Matrix client",
-      "localizedDescription": "Nexus for iOS. Unsigned builds, resigned at install by AltStore/SideStore.",
-      "iconURL": "https://git.federated.nexus/Nexus/nexus/raw/branch/main/assets/icon.png",
-      "category": "social",
-      "screenshots": [],
-      "versions": []
-    }
-  ],
-  "news": []
-}

analysis_options.yaml

@@ -2,7 +2,6 @@ analyzer:
     errors:
         invalid_annotation_target: ignore
         avoid_print: ignore
-        annotate_overrides: ignore
     exclude:
         - "build/**"
         - "**/*.g.dart"

android/app/build.gradle.kts

@@ -20,16 +20,21 @@ android {
     ndkVersion = flutter.ndkVersion
 
     compileOptions {
-        sourceCompatibility = JavaVersion.VERSION_21
+		isCoreLibraryDesugaringEnabled = true
+		sourceCompatibility = JavaVersion.VERSION_21
         targetCompatibility = JavaVersion.VERSION_21
     }
 
     defaultConfig {
         applicationId = "nexus.federated.nexus"
-        minSdk = 29
+
+		minSdk = 29
         targetSdk = flutter.targetSdkVersion
+
         versionCode = flutter.versionCode
         versionName = flutter.versionName
+
+		multiDexEnabled = true
     }
 
     signingConfigs {
@@ -63,6 +68,11 @@ android {
     }
 }
 
+dependencies {
+    implementation("org.unifiedpush.android:embedded-fcm-distributor:3.1.0")
+    coreLibraryDesugaring("com.android.tools:desugar_jdk_libs:2.1.4")
+}
+
 kotlin {
     compilerOptions {
         jvmTarget = org.jetbrains.kotlin.gradle.dsl.JvmTarget.JVM_21

android/app/src/main/AndroidManifest.xml

@@ -6,7 +6,9 @@
     <uses-permission
         android:name="android.permission.WRITE_EXTERNAL_STORAGE"
 		android:maxSdkVersion="29" />
+		<!-- Until https://github.com/flutter/flutter/issues/145290 is fixed, we need enableOnBackInvokedCallback as false -->
     <application
+    	android:enableOnBackInvokedCallback="false"
         android:label="Nexus"
         android:name="${applicationName}"
         android:icon="@mipmap/ic_launcher"
@@ -49,6 +51,16 @@
         <meta-data
             android:name="flutterEmbedding"
             android:value="2" />
+        <!-- Needed by pasteboard, for pasting files from the clipboard -->
+        <provider
+            android:name="androidx.core.content.FileProvider"
+            android:authorities="${applicationId}.provider"
+            android:exported="false"
+            android:grantUriPermissions="true">
+            <meta-data
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/provider_paths" />
+        </provider>
     </application>
     <!-- Required to query activities that can process text, see:
          https://developer.android.com/training/package-visibility and

android/app/src/main/kotlin/com/example/mobile_requester_app/MainActivity.kt

@@ -1,5 +0,0 @@
-package nexus.federated.nexus
-
-import io.flutter.embedding.android.FlutterActivity
-
-class MainActivity: FlutterActivity()

android/app/src/main/kotlin/nexus/federated/nexus/MainActivity.kt

@@ -0,0 +1,40 @@
+package nexus.federated.nexus
+
+import android.os.Build
+import android.os.Bundle
+import android.view.View
+import android.view.WindowInsets
+import android.view.WindowInsetsAnimation
+import io.flutter.embedding.android.FlutterActivity
+
+// TODO: Revert this commit once https://github.com/flutter/flutter/issues/191156 is fixed
+class MainActivity: FlutterActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.R) return
+
+        window.decorView.setWindowInsetsAnimationCallback(
+            object : WindowInsetsAnimation.Callback(DISPATCH_MODE_CONTINUE_ON_SUBTREE) {
+                override fun onProgress(
+                    insets: WindowInsets,
+                    runningAnimations: List<WindowInsetsAnimation>,
+                ) = insets
+
+                override fun onEnd(animation: WindowInsetsAnimation) {
+                    if ((animation.typeMask and WindowInsets.Type.ime()) != 0) reapplyInsets()
+                }
+            },
+        )
+    }
+
+    override fun onWindowFocusChanged(hasFocus: Boolean) {
+        super.onWindowFocusChanged(hasFocus)
+        if (hasFocus && Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) reapplyInsets()
+    }
+
+    // Posted so it runs after Flutter has applied any insets it deferred.
+    private fun reapplyInsets() {
+        val view = findViewById<View>(FLUTTER_VIEW_ID) ?: return
+        view.post { view.rootWindowInsets?.let(view::onApplyWindowInsets) }
+    }
+}

android/app/src/main/res/xml/provider_paths.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<paths xmlns:android="http://schemas.android.com/apk/res/android">
+    <external-path
+        name="external_files"
+        path="." />
+</paths>

android/gradle/wrapper/gradle-wrapper.properties

@@ -2,4 +2,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-9.5.0-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.6.0-all.zip

flake.lock

@@ -5,11 +5,11 @@
         "nixpkgs-lib": "nixpkgs-lib"
       },
       "locked": {
-        "lastModified": 1785627969,
-        "narHash": "sha256-4dtXQk/NMePegK/nWp5NSeuZKLATItOq61lpEvmXqGw=",
+        "lastModified": 1788450739,
+        "narHash": "sha256-glZLQlzIn1fXH6PazR2iUmTo7kzzyYSshrWhLS9TqCU=",
         "owner": "hercules-ci",
         "repo": "flake-parts",
-        "rev": "427bf4bd9435fdf21321c8cc628c24efc14c0f7a",
+        "rev": "31729ca8cbdb4fa927b34e5f4353e6a83f39e993",
         "type": "github"
       },
       "original": {
@@ -42,11 +42,11 @@
         "nixpkgs": "nixpkgs"
       },
       "locked": {
-        "lastModified": 1774860670,
-        "narHash": "sha256-YjJkQrvxrErXtfDi3obUn6rNmkA+CIAZ3f5NgL5xuYE=",
+        "lastModified": 1791751882,
+        "narHash": "sha256-DWcMlQFQMEqQGAHU6rAbl4uKWmlJMR1HZG0BvH0H2fk=",
         "owner": "neobrain",
         "repo": "nix2flatpak",
-        "rev": "61d68e21e3fbc2d57590051f48736bea271f4aba",
+        "rev": "7731e8b3fca73879f8217de5a919c0a5d17303de",
         "type": "github"
       },
       "original": {
@@ -73,11 +73,11 @@
     },
     "nixpkgs-lib": {
       "locked": {
-        "lastModified": 1785031560,
-        "narHash": "sha256-OmshNvn2vupOFpYinLUu+1Dnpu4n7Q5N3ggGVNHpkUI=",
+        "lastModified": 1788057806,
+        "narHash": "sha256-DTQSMxzDWmT0zhguthvegnVkn7CFqGCv4IHCzk5ZUpM=",
         "owner": "nix-community",
         "repo": "nixpkgs.lib",
-        "rev": "0e79af5e3d4dcfcd676ab5ba3f95d2e3352e078c",
+        "rev": "596e2e3940e09b2abbeb03f75fa1828c57fcd72c",
         "type": "github"
       },
       "original": {
@@ -88,11 +88,11 @@
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1786862985,
-        "narHash": "sha256-FBJRXmbGXiSUDvYEbfLYRkckayyZ6SK1UEqhCrIZ2Cs=",
+        "lastModified": 1790689126,
+        "narHash": "sha256-ilerN1WLSvF+HMjziC/Wv99J5y02maDH+6hZPwsORKg=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "e5bdc4a41d4c072fe1e3787eaa0320a384741d44",
+        "rev": "b4fd65b198c599cbe814fcb9f42d25d021595ec9",
         "type": "github"
       },
       "original": {

flake.nix

@@ -16,62 +16,12 @@
       ...
     }@inputs:
     flake-parts.lib.mkFlake { inherit inputs; } {
+      imports = [ ./linux/nix ];
       systems = [
         "x86_64-linux"
         "aarch64-linux"
         "aarch64-darwin"
         "x86_64-darwin"
       ];
-
-      perSystem =
-        {
-          lib,
-          pkgs,
-          system,
-          ...
-        }:
-
-        {
-          _module.args.pkgs = import nixpkgs {
-            inherit system;
-            config = {
-              android_sdk.accept_license = true;
-              allowUnfree = true;
-            };
-          };
-
-          packages =
-            let
-              default = pkgs.callPackage ./linux/nix/pkg {
-                src = self;
-              };
-            in
-            {
-              inherit default;
-
-              flatpak = inputs.nix2flatpak.lib.${system}.mkFlatpak {
-                appName = "Nexus";
-                developer = "QuadRadical";
-                appId = "nexus.federated.nexus";
-                package = default;
-                runtime = "org.gnome.Platform/49";
-                permissions = {
-                  share = [ "network" ];
-                  sockets = [
-                    "pulseaudio"
-                    "fallback-x11"
-                    "wayland"
-                  ];
-                  devices = [ "dri" ];
-                };
-              };
-
-              gomuks = pkgs.callPackage ./linux/nix/pkg/gomuks.nix {
-                src = self;
-              };
-            };
-
-          devShells.default = pkgs.callPackage ./linux/nix/devshell.nix { };
-        };
     };
 }

gomuks

@@ -1 +1 @@
-Subproject commit 0e06c7b74f96d3e29a8101893ca1921d13a90573
+Subproject commit 53cae0e0334aef5ac376ea84f19ba1cff8a92310

hook/build.dart

@@ -122,7 +122,7 @@ Future<void> main(List<String> args) => build(args, (input, output) async {
       "sqlite_fts5",
       "goolm",
       // goheif/dav1d is not supported on Android or iOS, would need to be fixed upstream
-      if (targetOS == OS.android || targetOS == OS.iOS) "noheic",
+      "noheic",
     ].join(",");
 
     final archiveFile = targetOS == OS.iOS

ios/Runner/AppDelegate.swift

@@ -7,7 +7,8 @@ import UIKit
     _ application: UIApplication,
     didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
   ) -> Bool {
-    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
+    UNUserNotificationCenter.current().delegate = self as? UNUserNotificationCenterDelegate
+	return super.application(application, didFinishLaunchingWithOptions: launchOptions)
   }
 
   func didInitializeImplicitFlutterEngine(_ engineBridge: FlutterImplicitEngineBridge) {

lib/controllers/account_data.dart

@@ -1,6 +1,7 @@
 import "dart:convert";
 
 import "package:fast_immutable_collections/fast_immutable_collections.dart";
+import "package:flutter/foundation.dart";
 import "package:flutter_riverpod/flutter_riverpod.dart";
 import "package:nexus/models/account_data.dart";
 
@@ -9,11 +10,16 @@ class AccountDataController extends Notifier<AccountData> {
   AccountData build() => .new();
 
   void update(IMap<String, IMap<String, dynamic>> newAccountData) =>
-      state = .fromJson({
-        ...json.decode(json.encode(state.toJson())),
-        ...newAccountData
-            .map((key, value) => MapEntry(key, value["content"]))
-            .unlock,
+      state = newAccountData.entries.fold(state, (data, entry) {
+        try {
+          return .fromJson({
+            ...json.decode(json.encode(data.toJson())),
+            entry.key: entry.value["content"],
+          });
+        } catch (error) {
+          debugPrint("Ignoring invalid ${entry.key} account data: $error");
+          return data;
+        }
       });
 
   static final provider = NotifierProvider<AccountDataController, AccountData>(

lib/controllers/all_emoji.dart

@@ -0,0 +1,25 @@
+import "package:fast_immutable_collections/fast_immutable_collections.dart";
+import "package:flutter_riverpod/flutter_riverpod.dart";
+import "package:material_emoji_picker/material_emoji_picker.dart";
+import "package:nexus/controllers/image_packs.dart";
+import "package:nexus/helpers/extensions/image_pack_emoji.dart";
+
+class AllEmojiController(final String roomId)
+    extends AsyncNotifier<IList<EmojiCategory>> {
+  @override
+  Future<IList<EmojiCategory>> build() async {
+    final packs = await ref.watch(ImagePacksController.provider(roomId).future);
+    final unicode = await ref.watch(EmojiController.provider.future);
+
+    return packs
+        .map((pack) => pack.emojiCategory)
+        .nonNulls
+        .toIList()
+        .addAll(unicode);
+  }
+
+  static final provider = AsyncNotifierProvider.autoDispose
+      .family<AllEmojiController, IList<EmojiCategory>, String>(
+        AllEmojiController.new,
+      );
+}

lib/controllers/app_paused.dart

@@ -0,0 +1,18 @@
+import "package:flutter/widgets.dart";
+import "package:flutter_riverpod/flutter_riverpod.dart";
+
+class AppPausedController extends Notifier<bool> {
+  @override
+  bool build() {
+    final listener = AppLifecycleListener(
+      onPause: () => state = true,
+      onResume: () => state = false,
+    );
+    ref.onDispose(listener.dispose);
+    return WidgetsBinding.instance.lifecycleState == .paused;
+  }
+
+  static final provider = NotifierProvider<AppPausedController, bool>(
+    AppPausedController.new,
+  );
+}

lib/controllers/attachment.dart

@@ -23,7 +23,7 @@ class AttachmentController(final String roomId)
     );
 
     final content = await ref
-        .watch(ClientController.provider.notifier)
+        .read(ClientController.provider.notifier)
         .uploadMedia(.new(path: file.path, encrypt: isEncrypted));
 
     state = (filename, content);

lib/controllers/auth_url.dart

@@ -8,7 +8,7 @@ class AuthUrlController(final Uri homeserver)
     extends AsyncNotifier<OAuthAuthCodeResponse> {
   @override
   Future<OAuthAuthCodeResponse> build() async => ref
-      .watch(ClientController.provider.notifier)
+      .read(ClientController.provider.notifier)
       .getAuthUrl(
         .new(
           homeserverUrl: homeserver,

lib/controllers/client.dart

@@ -1,3 +1,4 @@
+import "dart:async";
 import "dart:ffi";
 import "dart:io";
 import "dart:isolate";
@@ -5,33 +6,44 @@ import "dart:math";
 
 import "package:fast_immutable_collections/fast_immutable_collections.dart";
 import "package:ffi/ffi.dart";
-import "package:flutter/foundation.dart";
-import "package:nexus/controllers/account_data.dart";
-import "package:nexus/controllers/client_state.dart";
-import "package:nexus/controllers/init_complete.dart";
-import "package:nexus/controllers/rooms.dart";
-import "package:nexus/controllers/space_edges.dart";
-import "package:nexus/controllers/sync_status.dart";
-import "package:nexus/controllers/top_level_spaces.dart";
+import "package:flutter/cupertino.dart";
+import "package:intl/intl.dart";
+import "package:nexus/controllers/settings.dart";
 import "package:nexus/helpers/extensions/gomuks_buffer.dart";
-import "package:nexus/main.dart";
+import "package:nexus/models/capabilities.dart";
 import "package:nexus/models/content/message.dart";
 import "package:nexus/models/event.dart";
+import "package:nexus/models/event_context.dart";
+import "package:nexus/models/mentions_response.dart";
+import "package:nexus/models/gomuks_config.dart";
+import "package:nexus/models/gomuks_exception.dart";
 import "package:nexus/models/oauth_auth_code_response.dart";
 import "package:nexus/models/open_graph_data.dart";
 import "package:nexus/models/paginate.dart";
+import "package:nexus/models/paginate_manual.dart";
+import "package:nexus/models/requests/create_room.dart";
+import "package:nexus/models/requests/deregister_pusher.dart";
 import "package:nexus/models/requests/download_media.dart";
 import "package:nexus/models/requests/get_event.dart";
+import "package:nexus/models/requests/get_event_context.dart";
+import "package:nexus/models/requests/get_mentions.dart";
 import "package:nexus/models/requests/get_related_events.dart";
 import "package:nexus/models/requests/get_room_state.dart";
+import "package:nexus/models/requests/get_specific_room_state.dart";
+import "package:nexus/models/requests/get_space_hierarchy.dart";
 import "package:nexus/models/requests/join_room.dart";
 import "package:nexus/models/profile_response.dart";
+import "package:nexus/models/push_notification.dart";
+import "package:nexus/models/recovery_key.dart";
 import "package:nexus/models/requests/oauth/exchange_token.dart";
 import "package:nexus/models/requests/oauth/get_auth_url.dart";
 import "package:nexus/models/requests/oauth/register_client.dart";
 import "package:nexus/models/requests/paginate.dart";
+import "package:nexus/models/requests/paginate_manual.dart";
 import "package:nexus/models/requests/redact_event.dart";
+import "package:nexus/models/requests/register_pusher.dart";
 import "package:nexus/models/requests/report.dart";
+import "package:nexus/models/requests/search.dart";
 import "package:nexus/models/requests/send_event.dart";
 import "package:nexus/models/requests/send_message.dart";
 import "package:nexus/models/requests/set_account_data.dart";
@@ -40,8 +52,8 @@ import "package:nexus/models/requests/set_state.dart";
 import "package:nexus/models/requests/upload_media.dart";
 import "package:nexus/models/room.dart";
 import "package:nexus/models/room_summary.dart";
+import "package:nexus/models/space_hierarchy.dart";
 import "package:nexus/models/spec_versions_response.dart";
-import "package:nexus/models/sync_data.dart";
 import "package:nexus/src/third_party/gomuks.g.dart";
 import "package:flutter_riverpod/flutter_riverpod.dart";
 import "package:path_provider/path_provider.dart";
@@ -49,134 +61,115 @@ import "package:path_provider/path_provider.dart";
 class ClientController extends AsyncNotifier<int> {
   @override
   Future<int> build() async {
-    final Pointer<Char> root;
+    debugPrint("Setting Gomuks env...");
     if (Platform.isAndroid || Platform.isIOS) {
-      final dir = await getApplicationSupportDirectory();
-      root = "${dir.path}/gomuks".toNativeUtf8().cast();
-    } else {
-      root = nullptr.cast();
+      final env = {
+        "GOMUKS_ROOT": (await getApplicationSupportDirectory()).path,
+        "GOMUKS_CACHE_HOME": (await getApplicationCacheDirectory()).path,
+      };
+      for (final MapEntry(:key, :value) in env.entries) {
+        final keyPtr = key.toNativeUtf8().cast<Char>();
+        final valuePtr = value.toNativeUtf8().cast<Char>();
+        try {
+          GomuksSetEnv(keyPtr, valuePtr);
+        } finally {
+          calloc
+            ..free(keyPtr)
+            ..free(valuePtr);
+        }
+      }
     }
 
-    final handle = GomuksInit(root);
+    debugPrint("Initializing Gomuks...");
+    final handle = await Isolate.run(() {
+      final bufferPointer = GomuksConfig(
+        matrix: .new(
+          initialDeviceDisplayName:
+              "Nexus on ${toBeginningOfSentenceCase(Platform.operatingSystem)}",
+        ),
+      ).toJson().toGomuksBufferPtr();
 
-    final callable =
-        NativeCallable<
-          Void Function(Pointer<Char>, Int64, GomuksOwnedBuffer)
-        >.listener((
-          Pointer<Char> command,
-          int requestId,
-          GomuksOwnedBuffer data,
-        ) {
-          try {
-            final muksEventType = command.cast<Utf8>().toDartString();
-            debugPrint("Handling $muksEventType...");
-            final decodedMuksEvent = data.toJson();
+      try {
+        return GomuksInit(bufferPointer.ref);
+      } finally {
+        calloc
+          ..free(bufferPointer.ref.base)
+          ..free(bufferPointer);
+      }
+    });
 
-            switch (muksEventType) {
-              case "client_state":
-                ref
-                    .watch(ClientStateController.provider.notifier)
-                    .set(.fromJson(decodedMuksEvent));
-                break;
-              case "sync_status":
-                ref
-                    .watch(SyncStatusController.provider.notifier)
-                    .set(.fromJson(decodedMuksEvent));
-                break;
-              case "init_complete":
-                ref.watch(InitCompleteController.provider.notifier).complete();
-                break;
-              case "send_complete":
-                final event = Event.fromJson(decodedMuksEvent["event"]);
-                ref
-                    .watch(RoomsController.provider.notifier)
-                    .update(
-                      .new({
-                        event.roomId: .new(events: .new({event.rowId: event})),
-                      }),
-                      .new(),
-                    );
-
-                break;
-              case "sync_complete":
-                final syncData = SyncData.fromJson(decodedMuksEvent);
-                final roomProvider = RoomsController.provider;
-                final accountDataProvider = AccountDataController.provider;
-
-                if (syncData.clearState) {
-                  ref.invalidate(roomProvider);
-                  ref.invalidate(accountDataProvider);
-                }
-
-                ref
-                    .watch(roomProvider.notifier)
-                    .update(syncData.rooms, syncData.leftRooms);
-                ref
-                    .watch(accountDataProvider.notifier)
-                    .update(syncData.accountData);
-
-                if (syncData.topLevelSpaces != null) {
-                  ref
-                      .watch(TopLevelSpacesController.provider.notifier)
-                      .set(syncData.topLevelSpaces!);
-                }
-
-                if (syncData.spaceEdges != null) {
-                  ref
-                      .watch(SpaceEdgesController.provider.notifier)
-                      .set(syncData.spaceEdges!);
-                }
-
-                // ref
-                //     .watch(SyncStatusController.provider.notifier)
-                //     .set(SyncStatus.fromJson(decodedMuksEvent));
-                break;
-              default:
-                debugPrint("Unhandled event: $muksEventType");
-            }
-            debugPrint("Finished handling $muksEventType...");
-          } catch (error, stackTrace) {
-            if (kDebugMode) {
-              debugPrintStack(stackTrace: stackTrace, label: error.toString());
-              rethrow;
-            } else {
-              showError(error, stackTrace);
-            }
-          }
-        });
+    if (!ref.mounted) {
+      GomuksDestroy(handle);
+      return Completer<int>().future;
+    }
 
     ref.onDispose(() => GomuksDestroy(handle));
-    ref.onDispose(callable.close);
 
-    final errorCode = GomuksStart(handle, callable.nativeFunction);
+    return handle;
+  }
 
-    if (errorCode == 0) return handle;
-    throw Exception("GomuksStart returned error code $errorCode");
+  /// Calls gomuks with [data] as JSON, returning its decoded response.
+  Future<dynamic> callGomuksMethod(
+    Map<String, dynamic> data,
+    void Function(
+      int handle,
+      GomuksOwnedBuffer data,
+      Pointer<NativeFunction<Void Function(GomuksResponse)>> callback,
+    )
+    call,
+  ) async {
+    final handle = await future;
+    final buffer = data.toGomuksOwnedBuffer();
+
+    final completer = Completer<dynamic>();
+    late final NativeCallable<Void Function(GomuksResponse)> callable;
+    callable = .listener((GomuksResponse response) {
+      callable.close();
+      try {
+        final json = response.buf.toJsonAndFree();
+
+        if (response.command.cast<Utf8>().toDartString() == "error") {
+          throw GomuksException(json.toString());
+        }
+
+        completer.complete(json);
+      } catch (error, stackTrace) {
+        completer.completeError(error, stackTrace);
+      }
+    });
+
+    try {
+      call(handle, buffer, callable.nativeFunction);
+    } catch (_) {
+      // gomuks never got the call, so it won't respond or free the buffer
+      callable.close();
+      GomuksFreeBuffer(buffer);
+      rethrow;
+    }
+
+    return completer.future;
+  }
+
+  Future<PushNotification?> handlePush(Map<String, dynamic> data) async {
+    final response = await callGomuksMethod(data, GomuksHandlePushAsync);
+
+    return response?["notification"] == null
+        ? null
+        : .fromJson(response["notification"]);
   }
 
   Future<dynamic> _sendCommand(
     String command, [
     Map<String, dynamic> data = const {},
-  ]) async {
-    final bufferPointer = data.toGomuksBufferPtr();
-    final handle = await future;
-    final response = await Isolate.run(
-      () => GomuksSubmitCommand(
-        handle,
-        command.toNativeUtf8().cast<Char>(),
-        bufferPointer.ref,
-      ),
-    );
-
-    calloc.free(bufferPointer);
-
-    final json = response.buf.toJson();
-    if (response.command.cast<Utf8>().toDartString() == "error") {
-      throw json;
+  ]) => callGomuksMethod(data, (handle, data, callback) {
+    final commandPointer = command.toNativeUtf8().cast<Char>();
+    try {
+      GomuksSubmitCommandAsync(handle, commandPointer, data, callback);
+    } finally {
+      // gomuks copies the command name before returning
+      calloc.free(commandPointer);
     }
-
-    return json;
-  }
+  });
 
   Future<void> redactEvent(RedactEventRequest report) =>
       _sendCommand("redact_event", report.toJson());
@@ -188,16 +181,17 @@ class ClientController extends AsyncNotifier<int> {
     final json = request.toJson();
     final content = request.content.toJson();
 
-    return Event.fromJson(
+    return .fromJson(
       await _sendCommand("send_event", {
         ...json,
         "content": {
           ...content,
-          "m.relates_to": {
-            ...((content["m.relates_to"] as Map<String, dynamic>?) ?? {}),
-            "event_id": request.relatesTo,
-            "rel_type": request.relationType,
-          },
+          if (request.relatesTo != null)
+            "m.relates_to": {
+              ...((content["m.relates_to"] as Map<String, dynamic>?) ?? {}),
+              "event_id": request.relatesTo,
+              "rel_type": request.relationType,
+            },
         },
       }),
     );
@@ -206,30 +200,54 @@ class ClientController extends AsyncNotifier<int> {
   Future<String?> setState(SetStateRequest request) async =>
       await _sendCommand("set_state", request.toJson());
 
-  Future<String?> verify(String recoveryKey) async {
-    try {
-      await _sendCommand("verify", {"recovery_key": recoveryKey});
-      return null;
-    } catch (error) {
-      return error.toString();
+  Future<void> verify(String recoveryKey) =>
+      _sendCommand("verify", {"recovery_key": recoveryKey});
+
+  Future<RecoveryKey> generateRecoveryKey(String passphrase) async => .fromJson(
+    await _sendCommand("generate_recovery_key", {"passphrase": passphrase}),
+  );
+
+  Future<void> resetEncryption(RecoveryKey key) =>
+      _sendCommand("reset_encryption", key.toJson());
+
+  Future<Uri?> getCrossSigningResetUrl(Uri homeserver) async {
+    const action = "org.matrix.cross_signing_reset";
+    final oauth = (await _sendCommand("get_login_flows", {
+      "homeserver_url": homeserver.toString(),
+    }))["oauth"];
+
+    if (oauth?["account_management_uri"] case final String uri
+        when (oauth["account_management_actions_supported"] as List?)?.contains(
+              action,
+            ) ??
+            false) {
+      final parsed = Uri.parse(uri);
+      return parsed.replace(
+        queryParameters: {...parsed.queryParameters, "action": action},
+      );
     }
+    return null;
   }
 
   Future<String> joinRoom(JoinRoomRequest request) async =>
       (await _sendCommand("join_room", request.toJson()))["room_id"];
 
+  Future<String> knockRoom(JoinRoomRequest request) async =>
+      (await _sendCommand("knock_room", request.toJson()))["room_id"];
+
+  Future<String> createRoom(CreateRoomRequest request) async =>
+      (await _sendCommand("create_room", request.toJson()))["room_id"];
+
+  Future<SpaceHierarchy> getSpaceHierarchy(
+    GetSpaceHierarchyRequest request,
+  ) async =>
+      .fromJson(await _sendCommand("get_space_hierarchy", request.toJson()));
+
   Future<RoomSummary> getRoomSummary(JoinRoomRequest request) async =>
       .fromJson(await _sendCommand("get_room_summary", request.toJson()));
 
-  Future<void> leaveRoom(Room room) async {
-    if (room.metadata == null) return;
-    await _sendCommand("leave_room", {"room_id": room.metadata!.id});
-  }
-
-  // (await _sendCommand("get_event_context", {
-  //   "room_id": request.roomId,
-  //   "event_id": r"$OqZT4NuTj0J1-771IOEEWRI4XdumRNu6ighlvO3K3gc",
-  // }));
+  Future<void> leaveRoom(String roomId) =>
+      _sendCommand("leave_room", {"room_id": roomId});
 
   Future<IList<Event>> getRoomState(GetRoomStateRequest request) async {
     Future<List?> getState(GetRoomStateRequest request) async =>
@@ -243,6 +261,15 @@ class ClientController extends AsyncNotifier<int> {
     );
   }
 
+  Future<IList<Event>> getSpecificRoomState(
+    GetSpecificRoomStateRequest request,
+  ) async => .new(
+    ((await _sendCommand("get_specific_room_state", request.toJson()))
+                as List? ??
+            [])
+        .map((event) => .fromJson(event)),
+  );
+
   Future<IList<Event>?> getRelatedEvents(
     GetRelatedEventsRequest request,
   ) async {
@@ -251,6 +278,9 @@ class ClientController extends AsyncNotifier<int> {
     return .new(response?.map((event) => .fromJson(event)));
   }
 
+  Future<MentionsResponse> getMentions(GetMentionsRequest request) async =>
+      .fromJson(await _sendCommand("get_mentions", request.toJson()));
+
   Future<Event?> getEvent(GetEventRequest request) async {
     final json = await _sendCommand("get_event", request.toJson());
     return json == null ? null : .fromJson(json);
@@ -262,14 +292,35 @@ class ClientController extends AsyncNotifier<int> {
   Future<Paginate> paginate(PaginateRequest request) async =>
       .fromJson(await _sendCommand("paginate", request.toJson()));
 
+  Future<PaginateManual> paginateManual(PaginateManualRequest request) async =>
+      .fromJson(await _sendCommand("paginate_manual", request.toJson()));
+
+  Future<PaginateManual> searchLocal(SearchRequest request) async =>
+      .fromJson(await _sendCommand("search_local", request.toJson()));
+
+  Future<PaginateManual> searchServer(SearchRequest request) async =>
+      .fromJson(await _sendCommand("search_server", request.toJson()));
+
+  Future<EventContext> getEventContext(GetEventContextRequest request) async =>
+      .fromJson(await _sendCommand("get_event_context", request.toJson()));
+
   Future<ProfileResponse> getProfile(String userId) async {
     try {
       return .fromJson(await _sendCommand("get_profile", {"user_id": userId}));
     } catch (_) {
-      return ProfileResponse(profile: .new(id: userId));
+      return .new(profile: .new(id: userId));
     }
   }
 
+  Future<void> setProfileField(String field, Object? value) => _sendCommand(
+    "set_profile_field",
+    {
+      "field": field,
+      // gomuks deletes the field when the value is omitted, not when it's null
+      "value": ?value,
+    },
+  );
+
   Future<void> reportEvent(ReportRequest request) =>
       _sendCommand("report_event", request.toJson());
 
@@ -279,6 +330,15 @@ class ClientController extends AsyncNotifier<int> {
   Future<void> setAccountData(SetAccountDataRequest request) =>
       _sendCommand("set_account_data", request.toJson());
 
+  Future<void> registerPusher(RegisterPusherRequest request) =>
+      _sendCommand("register_homeserver_push", request.toJson());
+
+  Future<void> deregisterPusher(DeregisterPusherRequest request) =>
+      _sendCommand("register_homeserver_push", {
+        ...request.toJson(),
+        "kind": null,
+      });
+
   Future<MessageContent> uploadMedia(UploadMediaRequest request) async =>
       .fromJson(await _sendCommand("upload_media", request.toJson()));
 
@@ -287,14 +347,26 @@ class ClientController extends AsyncNotifier<int> {
 
   Future<void> logout() => _sendCommand("logout");
 
+  Future<void> setTyping(String roomId, Duration timeout) => _sendCommand(
+    "set_typing",
+    {"room_id": roomId, "timeout": timeout.inMilliseconds},
+  );
+
   Future<void> markRead(Room room) async {
+    if (room.timeline.isEmpty || room.metadata == null) return;
     final eventRowId = room.timeline[room.timeline.keys.reduce(max)];
     final event = eventRowId == null ? null : room.events[eventRowId];
-    if (event == null || room.metadata == null) return;
+
+    if (event == null) return;
+
+    // Private until settings have loaded, in case the user turned sending off
+    final sendPublic =
+        ref.read(SettingsController.provider).value?.readReceipts ==
+        .showAndSend;
 
     await _sendCommand("mark_read", {
       "room_id": room.metadata!.id,
-      "receipt_type": "m.read",
+      "receipt_type": sendPublic ? "m.read" : "m.read.private",
       "event_id": event.eventId,
     });
   }
@@ -313,9 +385,40 @@ class ClientController extends AsyncNotifier<int> {
   Future<void> exchangeToken(OAuthExchangeTokenRequest request) async =>
       await _sendCommand("oauth_exchange_token", request.toJson());
 
+  Future<IList<String>> getMutualRooms(String userId) async => IList(
+    ((await _sendCommand("get_mutual_rooms", {"user_id": userId}))["joined"]
+            as List?)
+        ?.cast<String>(),
+  );
+
+  Future<IList<String>> getLocalAliases(String roomId) async => IList(
+    ((await _sendCommand("get_local_aliases", {"room_id": roomId}))["aliases"]
+            as List?)
+        ?.cast<String>(),
+  );
+
+  Future<void> createAlias(String roomId, String alias) =>
+      _sendCommand("create_alias", {"room_id": roomId, "alias": alias});
+
+  Future<void> deleteAlias(String alias) =>
+      _sendCommand("delete_alias", {"alias": alias});
+
+  /// The room [alias] points to, or null if it doesn't exist.
+  Future<String?> resolveAlias(String alias) async {
+    try {
+      return (await _sendCommand("resolve_alias", {"alias": alias}))["room_id"];
+    } on GomuksException catch (error) {
+      if (error.statusCode == 404) return null;
+      rethrow;
+    }
+  }
+
   Future<SpecVersionsResponse> getSpecVersions() async =>
       .fromJson(await _sendCommand("get_versions"));
 
+  Future<Capabilities> getCapabilities() async =>
+      .fromJson((await _sendCommand("get_capabilities"))["capabilities"]);
+
   Future<Uri?> discoverHomeserver(Uri homeserver) async {
     try {
       final response = await _sendCommand("discover_homeserver", {

lib/controllers/client_id.dart

@@ -4,7 +4,7 @@ import "package:nexus/controllers/client.dart";
 class ClientIdController(final Uri homeserver) extends AsyncNotifier<String> {
   @override
   Future<String> build() => ref
-      .watch(ClientController.provider.notifier)
+      .read(ClientController.provider.notifier)
       .registerClient(
         .new(
           clientName: "Nexus",

lib/controllers/emoji.dart

@@ -1,84 +0,0 @@
-import "dart:convert";
-import "package:emoji_text_field/models/emoji_category.dart";
-import "package:fast_immutable_collections/fast_immutable_collections.dart";
-import "package:material_ui/material_ui.dart";
-import "package:flutter_riverpod/flutter_riverpod.dart";
-import "package:http/http.dart";
-import "package:nexus/models/emoji.dart";
-
-typedef EmojiTuple = (IMap<String, EmojiCategory>, IMap<String, List<String>>);
-
-class EmojiController extends AsyncNotifier<EmojiTuple> {
-  @override
-  Future<EmojiTuple> build() async {
-    final response = await get(
-      .https("github.com", "github/gemoji/raw/refs/heads/master/db/emoji.json"),
-    );
-
-    if (response.statusCode != 200) {
-      throw Exception("Failed to load emoji data");
-    }
-
-    final data = json.decode(response.body);
-
-    final entries = (data as List)
-        .cast<Map<String, dynamic>>()
-        .map(Emoji.fromJson)
-        .toIList();
-
-    final categoryMap = entries.fold<IMap<String, IList<String>>>(
-      .new(),
-      (acc, entry) => acc.update(
-        entry.category,
-        (list) => list.add(entry.emoji),
-        ifAbsent: () => .new([entry.emoji]),
-      ),
-    );
-
-    final keywordMap = entries.fold<IMap<String, IList<String>>>(
-      .new(),
-      (acc, entry) => acc.add(
-        entry.emoji,
-        .new([...entry.tags, ...entry.aliases, entry.description]),
-      ),
-    );
-
-    final customCategories = IMap.fromEntries(
-      categoryMap.entries.map(
-        (entry) => MapEntry(
-          entry.key,
-          EmojiCategory(
-            name: entry.key,
-            icon: switch (entry.key) {
-              "Smileys & Emotion" => Icons.emoji_emotions,
-              "People & Body" => Icons.emoji_people,
-              "Animals & Nature" => Icons.emoji_nature,
-              "Food & Drink" => Icons.emoji_food_beverage,
-              "Travel & Places" => Icons.travel_explore,
-              "Activities" => Icons.sports_soccer,
-              "Objects" => Icons.emoji_objects,
-              "Symbols" => Icons.emoji_symbols,
-              "Flags" => Icons.emoji_flags,
-              _ => Icons.category,
-            },
-            emojis: entry.value.toList(growable: false),
-          ),
-        ),
-      ),
-    );
-
-    final customKeywords = IMap(
-      .fromEntries(
-        keywordMap.entries.map(
-          (e) => .new(e.key, e.value.toList(growable: false)),
-        ),
-      ),
-    );
-
-    return (customCategories, customKeywords);
-  }
-
-  static final provider = AsyncNotifierProvider<EmojiController, EmojiTuple>(
-    EmojiController.new,
-  );
-}

lib/controllers/event.dart

@@ -9,18 +9,40 @@ class EventController(final GetEventRequest request)
     extends AsyncNotifier<Event?> {
   @override
   Future<Event?> build() async {
-    final room = ref.watch(
-      RoomsController.provider.select((value) => value[request.roomId]),
-    );
-    final event = room?.events.values.firstWhereOrNull(
-      (event) => event.eventId == request.eventId,
+    final event = ref.watch(
+      RoomsController.provider.select(
+        (rooms) => rooms[request.roomId]?.events.values.firstWhereOrNull(
+          (event) => event.eventId == request.eventId,
+        ),
+      ),
     );
 
-    return event ??
-        await ref
-            .watch(ClientController.provider.notifier)
-            .getEvent(request)
-            .onError((_, _) => null);
+    if (event != null) return event;
+
+    final link = ref.keepAlive();
+    final fetchedEvent = await ref
+        .read(ClientController.provider.notifier)
+        .getEvent(request)
+        .onError((_, _) => null)
+        .whenComplete(link.close);
+
+    if (fetchedEvent != null) {
+      // Storing the event invalidates this provider, as it watches the room.
+      // If nothing is listening, Riverpod won't rebuild it, and this build's
+      // result would be lost, so store it after returning.
+      final rooms = ref.read(RoomsController.provider.notifier);
+      Future.microtask(
+        () => rooms.update(
+          .new({
+            request.roomId: .new(
+              events: .new({fetchedEvent.rowId: fetchedEvent}),
+            ),
+          }),
+        ),
+      );
+    }
+
+    return fetchedEvent;
   }
 
   static final provider = AsyncNotifierProvider.family

lib/controllers/event_search.dart

@@ -0,0 +1,97 @@
+import "package:fast_immutable_collections/fast_immutable_collections.dart";
+import "package:flutter_riverpod/flutter_riverpod.dart";
+import "package:nexus/controllers/client.dart";
+import "package:nexus/controllers/rooms.dart";
+import "package:nexus/models/requests/search.dart";
+
+typedef EventSearchParams = ({String roomId, String query});
+typedef EventSearchResults = ({IList<int> rowIds, String? nextBatch});
+
+class EventSearchController(final EventSearchParams info)
+    extends AsyncNotifier<EventSearchResults> {
+  // We could have a mode without this for power users in the future
+  static String toFtsQuery(String query) => query
+      .split(RegExp(r"\s+"))
+      .where((word) => word.isNotEmpty)
+      .map((word) => '"${word.replaceAll('"', '""')}"*')
+      .join(" ");
+
+  @override
+  Future<EventSearchResults> build() async {
+    if (info.query.trim().isEmpty) {
+      return (rowIds: IList<int>(), nextBatch: null);
+    }
+
+    final client = ref.read(ClientController.provider.notifier);
+
+    final encrypted = ref.read(
+      RoomsController.provider.select(
+        (rooms) => rooms[info.roomId]?.metadata?.encryptionEvent != null,
+      ),
+    );
+    final request = SearchRequest(
+      searchTerm: encrypted ? toFtsQuery(info.query) : info.query,
+      roomIds: .new([info.roomId]),
+    );
+    final response = encrypted
+        ? await client.searchLocal(request)
+        : await client.searchServer(request);
+
+    if (!ref.mounted) return (rowIds: IList<int>(), nextBatch: null);
+
+    ref
+        .read(RoomsController.provider.notifier)
+        .storeEvents(response.events.addAll(response.relatedEvents));
+
+    return (
+      rowIds: response.events.map((event) => event.rowId).toIList(),
+      nextBatch: response.nextBatch,
+    );
+  }
+
+  Future<void> paginate() async {
+    if (state.isLoading) return;
+
+    final results = await future;
+    if (!ref.mounted || results.nextBatch == null) return;
+
+    state = .loading();
+
+    final encrypted = ref.read(
+      RoomsController.provider.select(
+        (rooms) => rooms[info.roomId]?.metadata?.encryptionEvent != null,
+      ),
+    );
+
+    final request = SearchRequest(
+      searchTerm: encrypted ? toFtsQuery(info.query) : info.query,
+      roomIds: .new([info.roomId]),
+      nextBatch: results.nextBatch,
+    );
+
+    final client = ref.read(ClientController.provider.notifier);
+    final response = encrypted
+        ? await client.searchLocal(request)
+        : await client.searchServer(request);
+
+    if (!ref.mounted) return;
+
+    ref
+        .read(RoomsController.provider.notifier)
+        .storeEvents(response.events.addAll(response.relatedEvents));
+
+    state = .data((
+      rowIds: results.rowIds.addAll(
+        response.events.map((event) => event.rowId),
+      ),
+      nextBatch: response.nextBatch,
+    ));
+  }
+
+  static final provider = AsyncNotifierProvider.family
+      .autoDispose<
+        EventSearchController,
+        EventSearchResults,
+        EventSearchParams
+      >(EventSearchController.new);
+}

lib/controllers/gomuks_listener.dart

@@ -0,0 +1,193 @@
+import "dart:async";
+import "dart:ffi";
+import "dart:io";
+import "dart:isolate";
+
+import "package:fast_immutable_collections/fast_immutable_collections.dart";
+import "package:flutter/foundation.dart";
+import "package:nexus/controllers/account_data.dart";
+import "package:nexus/controllers/app_paused.dart";
+import "package:nexus/controllers/client.dart";
+import "package:nexus/controllers/client_state.dart";
+import "package:nexus/controllers/init_complete.dart";
+import "package:nexus/controllers/invites.dart";
+import "package:nexus/controllers/rooms.dart";
+import "package:nexus/controllers/space_edges.dart";
+import "package:nexus/controllers/sync_status.dart";
+import "package:nexus/controllers/top_level_spaces.dart";
+import "package:nexus/controllers/typing.dart";
+import "package:nexus/helpers/extensions/gomuks_buffer.dart";
+import "package:nexus/main.dart";
+import "package:ffi/ffi.dart";
+import "package:nexus/models/event.dart";
+import "package:nexus/models/events_decrypted.dart";
+import "package:nexus/models/sync_data.dart";
+import "package:nexus/src/third_party/gomuks.g.dart";
+import "package:flutter_riverpod/flutter_riverpod.dart";
+
+class GomuksListenerController extends AsyncNotifier<void> {
+  @override
+  Future<void> build() async {
+    debugPrint("Starting gomuks...");
+    final handle = await ref.watch(ClientController.provider.future);
+
+    final callable =
+        NativeCallable<
+          Void Function(Pointer<Char>, Int64, GomuksOwnedBuffer)
+        >.listener((
+          Pointer<Char> command,
+          int requestId,
+          GomuksOwnedBuffer data,
+        ) {
+          try {
+            final muksEventType = command.cast<Utf8>().toDartString();
+            debugPrint("Handling $muksEventType...");
+            final decodedMuksEvent = data.toJsonAndFree();
+
+            switch (muksEventType) {
+              case "client_state":
+                ref
+                    .read(ClientStateController.provider.notifier)
+                    .set(.fromJson(decodedMuksEvent));
+              case "sync_status":
+                ref
+                    .read(SyncStatusController.provider.notifier)
+                    .set(.fromJson(decodedMuksEvent));
+              case "init_complete":
+                ref.read(InitCompleteController.provider.notifier).complete();
+              case "send_complete":
+                final event = Event.fromJson(decodedMuksEvent["event"]);
+                ref
+                    .read(RoomsController.provider.notifier)
+                    .update(
+                      .new({
+                        event.roomId: .new(events: .new({event.rowId: event})),
+                      }),
+                    );
+              case "typing":
+                ref
+                    .read(TypingController.provider.notifier)
+                    .set(.fromJson(decodedMuksEvent));
+              case "events_decrypted":
+                final decrypted = EventsDecrypted.fromJson(decodedMuksEvent);
+                final metadata = ref
+                    .read(RoomsController.provider)[decrypted.roomId]
+                    ?.metadata;
+
+                ref
+                    .read(RoomsController.provider.notifier)
+                    .update(
+                      .new({
+                        decrypted.roomId: .new(
+                          events: decrypted.events,
+                          metadata: metadata?.copyWith(
+                            previewEventRowID:
+                                decrypted.previewEventRowID ??
+                                metadata.previewEventRowID,
+                            sortingTimestamp:
+                                decrypted.sortingTimestamp ??
+                                metadata.sortingTimestamp,
+                          ),
+                        ),
+                      }),
+                    );
+              case "sync_complete":
+                final syncData = SyncData.fromJson(decodedMuksEvent);
+                final roomProvider = RoomsController.provider;
+                final accountDataProvider = AccountDataController.provider;
+                final invitesProvider = InvitesController.provider;
+
+                if (syncData.clearState) {
+                  ref.invalidate(roomProvider);
+                  ref.invalidate(accountDataProvider);
+                  ref.invalidate(invitesProvider);
+                  ref.invalidate(TypingController.provider);
+                }
+
+                ref
+                    .read(roomProvider.notifier)
+                    .update(syncData.rooms, syncData.leftRooms);
+                ref
+                    .read(accountDataProvider.notifier)
+                    .update(syncData.accountData);
+                ref
+                    .read(invitesProvider.notifier)
+                    .update(
+                      syncData.invitedRooms,
+                      joinedRooms: syncData.rooms.keys.toISet(),
+                      leftRooms: syncData.leftRooms,
+                    );
+
+                if (syncData.topLevelSpaces case final topLevelSpaces?) {
+                  ref
+                      .read(TopLevelSpacesController.provider.notifier)
+                      .set(topLevelSpaces);
+                }
+
+                if (syncData.spaceEdges case final spaceEdges?) {
+                  ref
+                      .read(SpaceEdgesController.provider.notifier)
+                      .set(spaceEdges);
+                }
+              default:
+                debugPrint("Unhandled event: $muksEventType");
+            }
+            debugPrint("Finished handling $muksEventType...");
+          } catch (error, stackTrace) {
+            if (kDebugMode) {
+              debugPrintStack(stackTrace: stackTrace, label: error.toString());
+              rethrow;
+            } else {
+              showError(error, stackTrace);
+            }
+          }
+        });
+
+    ref.onDispose(callable.close);
+
+    final errorCode = await _start(handle, callable.nativeFunction);
+    if (errorCode != 0) {
+      throw Exception("GomuksStart returned error code $errorCode");
+    }
+
+    if (!ref.mounted) return;
+
+    if (Platform.isAndroid || Platform.isIOS) {
+      // Mobile OSes block network access for backgrounded apps, so pause
+      // syncing instead of letting it fail.
+      ref.listen(AppPausedController.provider, (_, paused) {
+        if (paused) {
+          GomuksPauseSync(handle);
+        } else {
+          ref.invalidate(TypingController.provider);
+          GomuksResumeSync(handle);
+        }
+      }, fireImmediately: true);
+    }
+  }
+
+  /// Waits for gomuks to report the client's device ID
+  Future<String> deviceId() {
+    final completer = Completer<String>();
+    final subscription = ref.listen(
+      ClientStateController.provider.select((value) => value?.deviceId),
+      (_, next) {
+        if (next != null && !completer.isCompleted) completer.complete(next);
+      },
+      fireImmediately: true,
+    );
+    return completer.future.whenComplete(subscription.close);
+  }
+
+  static Future<int> _start(
+    int handle,
+    Pointer<
+      NativeFunction<Void Function(Pointer<Char>, Int64, GomuksOwnedBuffer)>
+    >
+    callback,
+  ) => Isolate.run(() => GomuksStart(handle, callback));
+
+  static final provider = AsyncNotifierProvider<GomuksListenerController, void>(
+    GomuksListenerController.new,
+  );
+}

lib/controllers/image_pack_sources.dart

@@ -0,0 +1,112 @@
+import "package:fast_immutable_collections/fast_immutable_collections.dart";
+import "package:flutter_riverpod/flutter_riverpod.dart";
+import "package:nexus/controllers/account_data.dart";
+import "package:nexus/controllers/client.dart";
+import "package:nexus/controllers/rooms.dart";
+import "package:nexus/controllers/space_edges.dart";
+import "package:nexus/models/content/content.dart";
+import "package:nexus/models/requests/get_specific_room_state.dart";
+
+typedef ImagePackSource = ({String roomId, String? stateKey});
+
+class ImagePackSourcesController(final String roomId)
+    extends AsyncNotifier<IList<ImagePackSource>> {
+  @override
+  Future<IList<ImagePackSource>> build() async {
+    final enabledPacks = ref.watch(
+      AccountDataController.provider.select(
+        (data) =>
+            (data.imagePackRooms ?? data.legacyImagePackRooms)?.rooms.map(
+              (roomId, packs) => .new(roomId, packs.keys.toISet()),
+            ) ??
+            const .empty(),
+      ),
+    );
+    final spaceEdges = ref.watch(SpaceEdgesController.provider);
+    final directParents = ref.watch(
+      RoomsController.provider.select(
+        (rooms) =>
+            rooms[roomId]?.state["m.space.parent"]?.keys.toISet() ??
+            const .empty(),
+      ),
+    );
+
+    Iterable<String> parentsOf(String childId) => spaceEdges.entries
+        .where((entry) => entry.value.any((edge) => edge.childId == childId))
+        .map((entry) => entry.key)
+        .followedBy(childId == roomId ? directParents : const []);
+
+    ISet<String> withAncestors(ISet<String> spaces, String childId) =>
+        parentsOf(childId).fold(
+          spaces,
+          (spaces, parentId) => spaces.contains(parentId)
+              ? spaces
+              : withAncestors(spaces.add(parentId), parentId),
+        );
+
+    final rooms = ref.read(RoomsController.provider);
+    final spaces = withAncestors(
+      const .empty(),
+      roomId,
+    ).remove(roomId).where(rooms.containsKey).toIList();
+
+    final client = ref.read(ClientController.provider.notifier);
+    final roomsNotifier = ref.read(RoomsController.provider.notifier);
+
+    await Future.wait(
+      spaces
+          .where((spaceId) => !rooms[spaceId]!.hasFetchedState)
+          .map(
+            (spaceId) async => roomsNotifier.addState(
+              spaceId,
+              await client.getRoomState(.new(roomId: spaceId)),
+            ),
+          ),
+    );
+
+    const packTypes = <EventType>[.imagePack, .legacyImagePack];
+    // Rooms we aren't in can't be fetched, and fetched rooms have every pack
+    final missingKeys = enabledPacks.entries
+        .where((entry) => !(rooms[entry.key]?.hasFetchedState ?? true))
+        .expand(
+          (entry) => entry.value
+              .where(
+                (stateKey) => packTypes.every(
+                  (type) =>
+                      rooms[entry.key]?.state[type.type]?[stateKey] == null,
+                ),
+              )
+              .expand(
+                (stateKey) => packTypes.map(
+                  (type) => RoomStateKey(
+                    roomId: entry.key,
+                    type: type.type,
+                    stateKey: stateKey,
+                  ),
+                ),
+              ),
+        )
+        .toIList();
+
+    if (missingKeys.isNotEmpty) {
+      roomsNotifier.addSpecificState(
+        await client.getSpecificRoomState(.new(keys: missingKeys)),
+      );
+    }
+
+    return .new([
+      (roomId: roomId, stateKey: null),
+      ...spaces.map((spaceId) => (roomId: spaceId, stateKey: null)),
+      ...enabledPacks.entries.expand(
+        (entry) => entry.value.map(
+          (stateKey) => (roomId: entry.key, stateKey: stateKey),
+        ),
+      ),
+    ]);
+  }
+
+  static final provider = AsyncNotifierProvider.autoDispose
+      .family<ImagePackSourcesController, IList<ImagePackSource>, String>(
+        ImagePackSourcesController.new,
+      );
+}

lib/controllers/image_packs.dart

@@ -0,0 +1,72 @@
+import "package:fast_immutable_collections/fast_immutable_collections.dart";
+import "package:flutter_riverpod/flutter_riverpod.dart";
+import "package:nexus/controllers/image_pack_sources.dart";
+import "package:nexus/controllers/rooms.dart";
+import "package:nexus/models/content/content.dart";
+import "package:nexus/models/content/image_pack.dart";
+import "package:nexus/models/event.dart";
+import "package:nexus/models/image_pack.dart";
+
+class ImagePacksController(final String roomId)
+    extends AsyncNotifier<IList<ImagePack>> {
+  @override
+  Future<IList<ImagePack>> build() async {
+    final sources = await ref.watch(
+      ImagePackSourcesController.provider(roomId).future,
+    );
+
+    final packs = ref.watch(
+      RoomsController.provider.select(
+        (rooms) => sources.expand((source) {
+          final room = rooms[source.roomId];
+          if (room == null) return const <ImagePack>[];
+
+          final newPacks = room.state[EventType.imagePack.type];
+          final legacyPacks = room.state[EventType.legacyImagePack.type];
+          final roomName = room.metadata?.name ?? source.roomId;
+
+          return switch (source.stateKey) {
+                final stateKey? => ISet([stateKey]),
+                null => ISet(
+                  newPacks?.keys ?? const <String>[],
+                ).addAll(legacyPacks?.keys ?? const []),
+              }
+              .map(
+                (stateKey) =>
+                    switch (newPacks?[stateKey] ?? legacyPacks?[stateKey]) {
+                      final rowId? => switch (room.events[rowId]) {
+                        Event(
+                          redactedBy: null,
+                          content: final ImagePackContent content,
+                        ) =>
+                          ImagePack.fromContent(
+                            content,
+                            id: "${source.roomId}/$stateKey",
+                            fallbackName: stateKey.isEmpty
+                                ? roomName
+                                : "$roomName - $stateKey",
+                          ),
+                        _ => null,
+                      },
+                      null => null,
+                    },
+              )
+              .nonNulls;
+        }).toIList(),
+      ),
+    );
+
+    return .new(
+      packs
+          .whereNoDuplicates(by: (pack) => pack.id)
+          .where(
+            (pack) => pack.emoticons.isNotEmpty || pack.stickers.isNotEmpty,
+          ),
+    );
+  }
+
+  static final provider = AsyncNotifierProvider.autoDispose
+      .family<ImagePacksController, IList<ImagePack>, String>(
+        ImagePacksController.new,
+      );
+}

lib/controllers/invites.dart

@@ -0,0 +1,122 @@
+import "package:collection/collection.dart";
+import "package:fast_immutable_collections/fast_immutable_collections.dart";
+import "package:flutter_riverpod/flutter_riverpod.dart";
+import "package:nexus/controllers/client.dart";
+import "package:nexus/controllers/client_state.dart";
+import "package:nexus/helpers/extensions/get_localpart.dart";
+import "package:nexus/models/content/avatar.dart";
+import "package:nexus/models/content/canonical_alias.dart";
+import "package:nexus/models/content/content.dart";
+import "package:nexus/models/content/create.dart";
+import "package:nexus/models/content/encryption.dart";
+import "package:nexus/models/content/history_visibility.dart";
+import "package:nexus/models/content/join_rules.dart";
+import "package:nexus/models/content/membership.dart";
+import "package:nexus/models/content/name.dart";
+import "package:nexus/models/content/topic.dart";
+import "package:nexus/models/invited_room.dart";
+import "package:nexus/models/room_summary.dart";
+
+/// Pending invites, newest first.
+class InvitesController extends Notifier<IList<RoomSummary>> {
+  @override
+  IList<RoomSummary> build() => .new();
+
+  /// Adds new invites, and removes invites for rooms that have since been
+  /// joined or left.
+  void update(
+    IList<InvitedRoom> invitedRooms, {
+    ISet<String> joinedRooms = const .empty(),
+    ISet<String> leftRooms = const .empty(),
+  }) {
+    final userId = ref.read(ClientStateController.provider)?.userId;
+
+    RoomSummary toSummary(InvitedRoom invite) {
+      final summary = invite.inviteState.fold(
+        RoomSummary(roomId: invite.roomId, membership: .invite),
+        (summary, event) => switch (event.content) {
+          NameContent(:final name) when name.isNotEmpty => summary.copyWith(
+            name: name,
+          ),
+          AvatarContent(:final url) => summary.copyWith(avatarUrl: url),
+          TopicContent(:final topic) when topic.isNotEmpty => summary.copyWith(
+            topic: topic,
+          ),
+          CanonicalAliasContent(:final alias) => summary.copyWith(
+            canonicalAlias: alias,
+          ),
+          JoinRulesContent(:final joinRule) => summary.copyWith(
+            joinRule: joinRule,
+          ),
+          CreateContent(:final type, :final roomVersion) => summary.copyWith(
+            roomType: type,
+            roomVersion: roomVersion,
+          ),
+          EncryptionContent(:final algorithm) => summary.copyWith(
+            encryption: algorithm,
+          ),
+          HistoryVisibilityContent(:final historyVisibility) =>
+            summary.copyWith(
+              worldReadable: historyVisibility == .worldReadable,
+            ),
+          MembershipContent(:final isDirect, :final reason)
+              when event.stateKey == userId =>
+            summary.copyWith(
+              invitedBy: event.sender,
+              inviteReason: reason,
+              isDirect: isDirect,
+            ),
+          _ => summary,
+        },
+      );
+
+      // The inviter is only known once the user's own invite has been found
+      final inviterProfile = switch (invite.inviteState
+          .firstWhereOrNull(
+            (event) =>
+                event.type == EventType.membership.type &&
+                event.stateKey == summary.invitedBy,
+          )
+          ?.content) {
+        MembershipContent content => content,
+        _ => null,
+      };
+
+      return summary.copyWith(
+        inviterProfile: inviterProfile,
+        // Direct messages usually have no name, so use the inviter's
+        name:
+            summary.name ??
+            (summary.isDirect
+                ? inviterProfile?.displayName ?? summary.invitedBy?.localpart
+                : null),
+      );
+    }
+
+    final newInvites = invitedRooms.map(toSummary).toIList();
+    final newRoomIds = newInvites.map((invite) => invite.roomId).toISet();
+    final removed = joinedRooms.addAll(leftRooms);
+
+    state = newInvites
+        .addAll(state.where((invite) => !newRoomIds.contains(invite.roomId)))
+        .removeWhere((invite) => removed.contains(invite.roomId));
+  }
+
+  void remove(String roomId) =>
+      state = state.removeWhere((invite) => invite.roomId == roomId);
+
+  Future<void> decline(String roomId) async {
+    await ref.read(ClientController.provider.notifier).leaveRoom(roomId);
+    remove(roomId);
+  }
+
+  /// Declines every invite, removing each as it succeeds. If any fail, the
+  /// first error is thrown once all have finished.
+  Future<void> declineAll() =>
+      Future.wait(state.map((invite) => decline(invite.roomId)));
+
+  static final provider =
+      NotifierProvider<InvitesController, IList<RoomSummary>>(
+        InvitesController.new,
+      );
+}

lib/controllers/jump_request.dart

@@ -0,0 +1,17 @@
+import "package:flutter_riverpod/flutter_riverpod.dart";
+
+typedef JumpRequest = ({String roomId, int rowId});
+
+class JumpRequestController extends Notifier<JumpRequest?> {
+  @override
+  JumpRequest? build() => null;
+
+  void request(String roomId, int rowId) =>
+      state = (roomId: roomId, rowId: rowId);
+
+  void consume() => state = null;
+
+  static final provider = NotifierProvider<JumpRequestController, JumpRequest?>(
+    JumpRequestController.new,
+  );
+}

lib/controllers/key.dart

@@ -1,27 +1,28 @@
 import "package:flutter_riverpod/flutter_riverpod.dart";
 import "package:nexus/controllers/shared_prefs.dart";
 
-class KeyController(final String key) extends Notifier<String?> {
+class KeyController(final String key) extends AsyncNotifier<String?> {
   static const String spaceKey = "space";
   static const String roomKey = "room";
+  static const String pushKeyKey = "pushKey";
 
   @override
-  String? build() =>
-      ref.watch(SharedPrefsController.provider).requireValue.getString(key);
+  Future<String?> build() =>
+      ref.watch(SharedPrefsController.provider).getString(key);
 
   Future<void> set(String? value) async {
-    final prefs = ref.watch(SharedPrefsController.provider).requireValue;
-    state = value;
+    final prefs = ref.read(SharedPrefsController.provider);
+    state = .data(value);
 
     if (value == null) {
-      prefs.remove(key);
+      await prefs.remove(key);
     } else {
-      prefs.setString(key, value);
+      await prefs.setString(key, value);
     }
   }
 
   static final provider =
-      NotifierProvider.family<KeyController, String?, String>(
+      AsyncNotifierProvider.family<KeyController, String?, String>(
         KeyController.new,
       );
 }

lib/controllers/local_aliases.dart

@@ -0,0 +1,28 @@
+import "package:fast_immutable_collections/fast_immutable_collections.dart";
+import "package:hooks_riverpod/hooks_riverpod.dart";
+import "package:nexus/controllers/client.dart";
+
+/// A room's aliases on the user's own server.
+class LocalAliasesController(final String roomId)
+    extends AsyncNotifier<IList<String>> {
+  @override
+  Future<IList<String>> build() =>
+      ref.read(ClientController.provider.notifier).getLocalAliases(roomId);
+
+  Future<void> add(String alias) async {
+    await ref
+        .read(ClientController.provider.notifier)
+        .createAlias(roomId, alias);
+    ref.invalidateSelf();
+  }
+
+  Future<void> remove(String alias) async {
+    await ref.read(ClientController.provider.notifier).deleteAlias(alias);
+    ref.invalidateSelf();
+  }
+
+  static final provider = AsyncNotifierProvider.family
+      .autoDispose<LocalAliasesController, IList<String>, String>(
+        LocalAliasesController.new,
+      );
+}

lib/controllers/member_list_opened.dart

@@ -1,22 +1,20 @@
 import "package:flutter_riverpod/flutter_riverpod.dart";
 import "package:nexus/controllers/shared_prefs.dart";
 
-class MemberListOpenedController extends Notifier<bool> {
+class MemberListOpenedController extends AsyncNotifier<bool> {
   static const String key = "memberListOpened";
 
   @override
-  bool build() =>
-      ref.watch(SharedPrefsController.provider).requireValue.getBool(key) ??
-      true;
+  Future<bool> build() async =>
+      await ref.watch(SharedPrefsController.provider).getBool(key) ?? true;
 
   Future<void> set(bool value) async {
-    final prefs = ref.watch(SharedPrefsController.provider).requireValue;
-    state = value;
-
-    prefs.setBool(key, value);
+    state = .data(value);
+    await ref.read(SharedPrefsController.provider).setBool(key, value);
   }
 
-  static final provider = NotifierProvider<MemberListOpenedController, bool>(
-    MemberListOpenedController.new,
-  );
+  static final provider =
+      AsyncNotifierProvider<MemberListOpenedController, bool>(
+        MemberListOpenedController.new,
+      );
 }

lib/controllers/members.dart

@@ -18,7 +18,7 @@ class MembersController(final String roomId)
 
     if (!room.hasFetchedMembers) {
       final fetchedState = await ref
-          .watch(ClientController.provider.notifier)
+          .read(ClientController.provider.notifier)
           .getRoomState(
             GetRoomStateRequest(
               roomId: roomId,
@@ -27,7 +27,7 @@ class MembersController(final String roomId)
             ),
           );
 
-      await ref
+      ref
           .read(RoomsController.provider.notifier)
           .addState(roomId, fetchedState, isMembers: true);
     }

lib/controllers/members_grouped.dart

@@ -1,44 +1,27 @@
 import "package:fast_immutable_collections/fast_immutable_collections.dart";
 import "package:flutter_riverpod/flutter_riverpod.dart";
 import "package:nexus/controllers/members_by_status.dart";
-import "package:nexus/controllers/room_creators.dart";
-import "package:nexus/controllers/rooms.dart";
+import "package:nexus/controllers/room_power_levels.dart";
 import "package:nexus/models/configs/members_by_status.dart";
-import "package:nexus/models/content/content.dart";
-import "package:nexus/models/content/power_levels.dart";
 import "package:nexus/models/event.dart";
 
 class MembersGroupedController(final MembersByStatusConfig config)
     extends AsyncNotifier<IList<MapEntry<int?, ISet<Event>>>> {
   @override
   Future<IList<MapEntry<int?, ISet<Event>>>> build() async {
-    final room = ref.watch(
-      RoomsController.provider.select((value) => value[config.roomId]),
+    final powerLevels = ref.watch(
+      RoomPowerLevelsController.provider(config.roomId),
     );
 
-    final roomCreators = room == null
-        ? null
-        : ref.watch((RoomCreatorsController.provider(room)));
-
-    final powerLevelsRowId = room?.state[EventType.powerLevels.type]?[""];
-    final powerLevelsEvent = powerLevelsRowId == null
-        ? null
-        : room?.events[powerLevelsRowId];
-
-    final content = switch (powerLevelsEvent?.content) {
-      PowerLevelsContent content => content,
-      _ => PowerLevelsContent(),
-    };
-
     final members = await ref.watch(
       MembersByStatusController.provider(config).future,
     );
 
     return members
         .fold<IMap<int?, ISet<Event>>>(.new(), (result, event) {
-          final groupKey = roomCreators?.contains(event.stateKey!) == true
+          final groupKey = powerLevels.creators.contains(event.stateKey!)
               ? null
-              : content.users[event.stateKey!] ?? content.usersDefault;
+              : powerLevels.levelOf(event.stateKey!).toInt();
 
           return result.update(
             groupKey,

lib/controllers/multi_provider.dart

@@ -6,8 +6,10 @@ import "package:flutter_riverpod/flutter_riverpod.dart";
 class MultiProviderController(final IList<AsyncNotifierProvider> providers)
     extends AsyncNotifier<void> {
   @override
-  Future<void> build() =>
-      .wait(providers.map((provider) => ref.watch(provider.future)));
+  Future<void> build() => .wait(
+    providers.map((provider) => ref.watch(provider.future)),
+    eagerError: true,
+  );
 
   static final provider =
       AsyncNotifierProvider.family<

lib/controllers/mutual_rooms.dart

@@ -0,0 +1,15 @@
+import "package:fast_immutable_collections/fast_immutable_collections.dart";
+import "package:hooks_riverpod/hooks_riverpod.dart";
+import "package:nexus/controllers/client.dart";
+
+class MutualRoomsController(final String userId)
+    extends AsyncNotifier<IList<String>> {
+  @override
+  Future<IList<String>> build() =>
+      ref.read(ClientController.provider.notifier).getMutualRooms(userId);
+
+  static final provider = AsyncNotifierProvider.family
+      .autoDispose<MutualRoomsController, IList<String>, String>(
+        MutualRoomsController.new,
+      );
+}

lib/controllers/notification.dart

@@ -0,0 +1,281 @@
+import "dart:async";
+import "dart:convert";
+import "dart:io";
+
+import "package:flutter/services.dart";
+import "package:material_ui/material_ui.dart";
+import "package:nexus/controllers/portal.dart";
+import "package:nexus/controllers/sidebar_page.dart";
+import "package:nexus/main.dart";
+import "package:flutter_local_notifications/flutter_local_notifications.dart";
+import "package:flutter_riverpod/flutter_riverpod.dart";
+import "package:nexus/controllers/notification_request.dart";
+import "package:nexus/models/push_notification.dart";
+import "package:xdg_desktop_portal/xdg_desktop_portal.dart";
+
+typedef NotificationMessage = ({
+  NotificationUser sender,
+  NotificationUser self,
+  File? senderAvatar,
+  bool isDm,
+});
+
+class NotificationController
+    extends AsyncNotifier<FlutterLocalNotificationsPlugin> {
+  @override
+  Future<FlutterLocalNotificationsPlugin> build() async {
+    final notifications = FlutterLocalNotificationsPlugin();
+
+    if (!Platform.isLinux) {
+      final darwin = DarwinInitializationSettings();
+
+      await notifications.initialize(
+        settings: .new(
+          windows: .new(
+            appName: "Nexus",
+            appUserModelId: "nexus.federated.nexus",
+            guid: "dde78daf-130f-4e46-a80a-e31deeab45d7",
+          ),
+          android: .new("ic_launcher_foreground"),
+          iOS: darwin,
+          macOS: darwin,
+        ),
+        onDidReceiveNotificationResponse: (details) {
+          if (details.payload == null) return;
+
+          if (int.tryParse(details.payload!) case final rowId?) {
+            navigatorKey.currentState?.popUntil((route) => route.isFirst);
+            ref
+                .read(SidebarPageController.provider.notifier)
+                .set(.notifications);
+            ref
+                .read(NotificationRequestController.provider.notifier)
+                .request(rowId);
+          }
+        },
+      );
+    }
+
+    if (Platform.isLinux) {
+      const notificationChannel = MethodChannel("nexus/notifications");
+
+      notificationChannel.setMethodCallHandler((call) async {
+        if (call.method != "notificationClicked") {
+          return;
+        }
+
+        if (int.tryParse(call.arguments) case int rowId) {
+          navigatorKey.currentState?.popUntil((route) => route.isFirst);
+          ref.read(SidebarPageController.provider.notifier).set(.notifications);
+          ref
+              .read(NotificationRequestController.provider.notifier)
+              .request(rowId);
+        }
+      });
+
+      ref.onDispose(() => notificationChannel.setMethodCallHandler(null));
+    }
+
+    return notifications;
+  }
+
+  Future<bool> requestPermissions() async {
+    if (Platform.isLinux) {
+      return true;
+    }
+
+    final controller = await future;
+
+    if (Platform.isIOS) {
+      return await controller
+              .resolvePlatformSpecificImplementation<
+                IOSFlutterLocalNotificationsPlugin
+              >()
+              ?.requestPermissions(alert: true, badge: true, sound: true) ??
+          true;
+    } else if (Platform.isMacOS) {
+      return await controller
+              .resolvePlatformSpecificImplementation<
+                MacOSFlutterLocalNotificationsPlugin
+              >()
+              ?.requestPermissions(alert: true, badge: true, sound: true) ??
+          true;
+    } else if (Platform.isAndroid) {
+      return await controller
+              .resolvePlatformSpecificImplementation<
+                AndroidFlutterLocalNotificationsPlugin
+              >()
+              ?.requestNotificationsPermission() ??
+          true;
+    }
+
+    return true;
+  }
+
+  /// Whether notifications can currently be shown, without prompting
+  Future<bool> permissionsGranted() async {
+    if (Platform.isLinux) {
+      return true;
+    }
+
+    final controller = await future;
+
+    if (Platform.isIOS) {
+      return (await controller
+                  .resolvePlatformSpecificImplementation<
+                    IOSFlutterLocalNotificationsPlugin
+                  >()
+                  ?.checkPermissions())
+              ?.isEnabled ??
+          true;
+    } else if (Platform.isMacOS) {
+      return (await controller
+                  .resolvePlatformSpecificImplementation<
+                    MacOSFlutterLocalNotificationsPlugin
+                  >()
+                  ?.checkPermissions())
+              ?.isEnabled ??
+          true;
+    } else if (Platform.isAndroid) {
+      return await controller
+              .resolvePlatformSpecificImplementation<
+                AndroidFlutterLocalNotificationsPlugin
+              >()
+              ?.areNotificationsEnabled() ??
+          true;
+    }
+
+    return true;
+  }
+
+  /// Passing [message] shows it as a chat message in the conversation for
+  /// [threadId], naming the sender in group chats.
+  Future<void> send({
+    required int id,
+    required String title,
+    required String body,
+    String? payload,
+    String? threadId,
+    DateTime? timestamp,
+    File? icon,
+    bool sound = true,
+    NotificationMessage? message,
+  }) async {
+    debugPrint("Sending notification for $id");
+
+    // In DMs the title is already the sender
+    final sender = message == null || message.isDm ? null : message.sender;
+    final prefixedBody = sender == null ? body : "${sender.name}: $body";
+
+    if (Platform.isLinux) {
+      final portal = await ref.read(PortalController.provider.future);
+      const escape = HtmlEscape(.element);
+
+      await portal.notification.addNotification(
+        id.toString(),
+        title: title,
+        body: prefixedBody,
+        markupBody: sender == null
+            ? null
+            : "<b>${escape.convert(sender.name)}</b>: ${escape.convert(body)}",
+        defaultAction: "app.event",
+        defaultActionTarget: payload,
+        sound: sound ? null : const XdgNotificationSoundSilent(),
+        category: message == null ? null : XdgNotificationCategory.imReceived,
+        priority: .normal,
+        buttons: [
+          // TODO: Impl when notif daemons actualy support imReplyWithText
+          // .new(
+          //   label: "Reply",
+          //   action: "app.reply",
+          //   purpose: XdgNotificationButtonPurpose.imReplyWithText,
+          // ),
+        ],
+      );
+      return;
+    }
+
+    final controller = await future;
+
+    // Append to the conversation already shown under this id, if any
+    final existingStyle = Platform.isAndroid && message != null
+        ? await controller
+              .resolvePlatformSpecificImplementation<
+                AndroidFlutterLocalNotificationsPlugin
+              >()
+              ?.getActiveNotificationMessagingStyle(id: id)
+              .onError((_, _) => null)
+        : null;
+
+    final darwin = DarwinNotificationDetails(
+      presentSound: sound,
+      threadIdentifier: threadId,
+    );
+
+    await controller.show(
+      id: id,
+      title: title,
+      body: prefixedBody,
+      payload: payload,
+      notificationDetails: .new(
+        android: message == null
+            ? .new(
+                "general",
+                "General",
+                silent: !sound,
+                when: timestamp?.millisecondsSinceEpoch,
+                largeIcon: icon == null
+                    ? null
+                    : FilePathAndroidBitmap(icon.path),
+                styleInformation: BigTextStyleInformation(body),
+              )
+            : .new(
+                "messages",
+                "Messages",
+                silent: !sound,
+                when: timestamp?.millisecondsSinceEpoch,
+                category: .message,
+                largeIcon: icon == null
+                    ? null
+                    : FilePathAndroidBitmap(icon.path),
+                styleInformation: MessagingStyleInformation(
+                  .new(key: message.self.id, name: message.self.name),
+                  conversationTitle: message.isDm ? null : title,
+                  groupConversation: !message.isDm,
+                  messages: [
+                    ...?existingStyle?.messages,
+                    .new(
+                      body,
+                      timestamp ?? .now(),
+                      .new(
+                        key: message.sender.id,
+                        name: message.sender.name,
+                        icon: message.senderAvatar == null
+                            ? null
+                            : BitmapFilePathAndroidIcon(
+                                message.senderAvatar!.path,
+                              ),
+                      ),
+                    ),
+                  ],
+                ),
+              ),
+        iOS: darwin,
+        macOS: darwin,
+        windows: .new(
+          audio: sound ? null : .silent(),
+          timestamp: timestamp,
+          header: threadId == null
+              ? null
+              : .new(id: threadId, title: title, arguments: payload ?? ""),
+        ),
+      ),
+    );
+  }
+
+  static final provider =
+      AsyncNotifierProvider<
+        NotificationController,
+        FlutterLocalNotificationsPlugin
+      >(NotificationController.new);
+}

lib/controllers/notification_request.dart

@@ -0,0 +1,14 @@
+import "package:flutter_riverpod/flutter_riverpod.dart";
+
+class NotificationRequestController extends Notifier<int?> {
+  @override
+  int? build() => null;
+
+  void request(int rowId) => state = rowId;
+
+  void consume() => state = null;
+
+  static final provider = NotifierProvider<NotificationRequestController, int?>(
+    NotificationRequestController.new,
+  );
+}

lib/controllers/notifications.dart

@@ -0,0 +1,78 @@
+import "package:fast_immutable_collections/fast_immutable_collections.dart";
+import "package:flutter_riverpod/flutter_riverpod.dart";
+import "package:nexus/controllers/client.dart";
+import "package:nexus/controllers/rooms.dart";
+import "package:nexus/models/event.dart";
+
+typedef NotificationsRequest = (UnreadType? unreadType, String? roomId);
+
+class NotificationsController(final NotificationsRequest request)
+    extends AsyncNotifier<IList<(int, String)>> {
+  @override
+  Future<IList<(int, String)>> build() async {
+    final client = ref.read(ClientController.provider.notifier);
+
+    final (unreadType, roomId) = request;
+
+    final mentions = await client.getMentions(
+      .new(
+        maxTimestamp: .now(),
+        unreadType: unreadType ?? .highlight,
+        roomId: roomId,
+      ),
+    );
+
+    ref
+        .read(RoomsController.provider.notifier)
+        .storeEvents(mentions.events.addAll(mentions.relatedEvents));
+
+    return .new(mentions.events.map((event) => (event.rowId, event.roomId)));
+  }
+
+  Future<void> loadOlder() async {
+    final currentNotifications = await future;
+    state = .loading();
+    state = await .guard(() async {
+      final lastNotification = currentNotifications.lastOrNull;
+      final lastTs = lastNotification == null
+          ? null
+          : ref.read(
+              RoomsController.provider.select(
+                (rooms) => rooms[lastNotification.$2]
+                    ?.events[lastNotification.$1]
+                    ?.timestamp,
+              ),
+            );
+
+      if (lastTs == null) return currentNotifications;
+
+      final client = ref.read(ClientController.provider.notifier);
+      final (unreadType, roomId) = request;
+
+      final newNotifications = await client.getMentions(
+        .new(
+          maxTimestamp: lastTs,
+          unreadType: unreadType ?? .highlight,
+          roomId: roomId,
+        ),
+      );
+
+      ref
+          .read(RoomsController.provider.notifier)
+          .storeEvents(
+            newNotifications.events.addAll(newNotifications.relatedEvents),
+          );
+
+      return currentNotifications.addAll(
+        newNotifications.events.map((event) => (event.rowId, event.roomId)),
+      );
+    });
+  }
+
+  static final provider = AsyncNotifierProvider.family
+      .autoDispose<
+        NotificationsController,
+        IList<(int, String)>,
+        NotificationsRequest
+      >(NotificationsController.new);
+}

lib/controllers/pinned_events.dart

@@ -2,26 +2,25 @@ import "package:fast_immutable_collections/fast_immutable_collections.dart";
 import "package:hooks_riverpod/hooks_riverpod.dart";
 import "package:nexus/controllers/event.dart";
 import "package:nexus/controllers/pinned_ids.dart";
-import "package:nexus/models/event.dart";
 
 class PinnedEventsController(final String roomId)
-    extends AsyncNotifier<IList<Event>> {
+    extends AsyncNotifier<IList<int>> {
   @override
-  Future<IList<Event>> build() async {
+  Future<IList<int>> build() async {
     final pinIds = ref.watch(PinnedIdsController.provider(roomId));
 
     return (await Future.wait(
       pinIds.map(
         (eventId) => ref.watch(
           EventController.provider(.new(eventId: eventId, roomId: roomId))
-              .future,
+              .selectAsync((data) => data?.rowId),
         ),
       ),
     )).nonNulls.toIList();
   }
 
   static final provider = AsyncNotifierProvider.family
-      .autoDispose<PinnedEventsController, IList<Event>, String>(
+      .autoDispose<PinnedEventsController, IList<int>, String>(
         PinnedEventsController.new,
       );
 }

lib/controllers/portal.dart

@@ -0,0 +1,22 @@
+import "dart:io";
+
+import "package:flutter_riverpod/flutter_riverpod.dart";
+import "package:xdg_desktop_portal/xdg_desktop_portal.dart";
+
+class PortalController extends AsyncNotifier<XdgDesktopPortalClient> {
+  @override
+  Future<XdgDesktopPortalClient> build() async {
+    final portal = XdgDesktopPortalClient();
+    if (!await File("/.flatpak-info").exists()) {
+      await portal.registerApplication("nexus.federated.nexus");
+    }
+
+    ref.onDispose(portal.close);
+    return portal;
+  }
+
+  static final provider =
+      AsyncNotifierProvider<PortalController, XdgDesktopPortalClient>(
+        PortalController.new,
+      );
+}

lib/controllers/power_level.dart

@@ -1,10 +1,8 @@
 import "package:flutter_riverpod/flutter_riverpod.dart";
 import "package:nexus/controllers/client_state.dart";
-import "package:nexus/controllers/room_creators.dart";
-import "package:nexus/controllers/rooms.dart";
+import "package:nexus/controllers/room_power_levels.dart";
 import "package:nexus/models/configs/power_level.dart";
 import "package:nexus/models/content/content.dart";
-import "package:nexus/models/content/power_levels.dart";
 
 class PowerLevelController(final PowerLevelConfig config)
     extends Notifier<bool> {
@@ -17,31 +15,17 @@ class PowerLevelController(final PowerLevelConfig config)
       );
     }
 
-    final room = ref.watch(
-      RoomsController.provider.select((value) => value[config.roomId]),
+    final powerLevels = ref.watch(
+      RoomPowerLevelsController.provider(config.roomId),
     );
-
-    final roomCreators = room == null
-        ? null
-        : ref.watch(RoomCreatorsController.provider(room));
-
-    final eventRowId = room?.state[EventType.powerLevels.type]?[""];
-
-    final event = eventRowId == null ? null : room?.events[eventRowId];
-    final content = event?.content is PowerLevelsContent
-        ? event!.content
-        : PowerLevelsContent();
+    final content = powerLevels.content;
 
     final user = ref.watch(
       ClientStateController.provider.select((value) => value?.userId),
     );
-    if (user == null || content is! PowerLevelsContent) return false;
+    if (user == null) return false;
 
-    double powerLevelOf(String userId) => roomCreators?.contains(userId) == true
-        ? double.infinity
-        : (content.users[userId] ?? content.usersDefault).toDouble();
-
-    final userLevel = powerLevelOf(user);
+    final userLevel = powerLevels.levelOf(user);
 
     return switch (config) {
       EventPowerLevelConfig(:final eventType) =>
@@ -52,10 +36,12 @@ class PowerLevelController(final PowerLevelConfig config)
           .invite => userLevel >= content.invite,
 
           .kick =>
-            userLevel >= content.kick && userLevel > powerLevelOf(targetUser),
+            userLevel >= content.kick &&
+                userLevel > powerLevels.levelOf(targetUser),
 
           .ban =>
-            userLevel >= content.ban && userLevel > powerLevelOf(targetUser),
+            userLevel >= content.ban &&
+                userLevel > powerLevels.levelOf(targetUser),
 
           .unban => userLevel >= content.ban,
         },

lib/controllers/power_levels_saving.dart

@@ -0,0 +1,20 @@
+import "package:flutter_riverpod/flutter_riverpod.dart";
+
+class PowerLevelsSavingController(final String roomId) extends Notifier<bool> {
+  @override
+  bool build() => false;
+
+  Future<void> run(Future<void> Function() action) async {
+    state = true;
+    try {
+      await action();
+    } finally {
+      if (ref.mounted) state = false;
+    }
+  }
+
+  static final provider = NotifierProvider.autoDispose
+      .family<PowerLevelsSavingController, bool, String>(
+        PowerLevelsSavingController.new,
+      );
+}

lib/controllers/profile.dart

@@ -6,10 +6,19 @@ class ProfileController(final String userId)
     extends AsyncNotifier<ProfileResponse> {
   @override
   Future<ProfileResponse> build() {
-    final client = ref.watch(ClientController.provider.notifier);
+    final client = ref.read(ClientController.provider.notifier);
     return client.getProfile(userId);
   }
 
+  Future<void> setField(String field, Object? value) async {
+    await ref
+        .read(ClientController.provider.notifier)
+        .setProfileField(field, value);
+    if (!ref.mounted) return;
+    ref.invalidateSelf();
+    await future;
+  }
+
   static final provider = AsyncNotifierProvider.family
       .autoDispose<ProfileController, ProfileResponse, String>(
         ProfileController.new,

lib/controllers/push_key.dart

@@ -0,0 +1,31 @@
+import "dart:convert";
+
+import "package:fast_immutable_collections/fast_immutable_collections.dart";
+import "package:flutter_riverpod/flutter_riverpod.dart";
+import "package:nexus/controllers/key.dart";
+
+class PushKeyController(final String instance) extends AsyncNotifier<String?> {
+  @override
+  Future<String?> build() async => json.decode(
+    await ref.watch(KeyController.provider(KeyController.pushKeyKey).future) ??
+        "{}",
+  )[instance];
+
+  Future<void> set(String? value) async {
+    final provider = KeyController.provider(KeyController.pushKeyKey);
+    final notifier = ref.read(provider.notifier);
+    final prefs = IMap(json.decode(await ref.read(provider.future) ?? "{}"));
+
+    state = .data(value);
+    notifier.set(
+      json.encode(
+        prefs.add(instance, value).where((_, value) => value != null).unlock,
+      ),
+    );
+  }
+
+  static final provider =
+      AsyncNotifierProvider.family<PushKeyController, String?, String>(
+        PushKeyController.new,
+      );
+}

lib/controllers/reactions.dart

@@ -18,7 +18,7 @@ class ReactionsController(final ReactionsConfig config)
 
     final reactionEvents = eventInfo?.$2.isNotEmpty == true
         ? await ref
-              .watch(ClientController.provider.notifier)
+              .read(ClientController.provider.notifier)
               .getRelatedEvents(
                 .new(
                   roomId: config.roomId,

lib/controllers/read_receipts.dart

@@ -0,0 +1,90 @@
+import "package:collection/collection.dart";
+import "package:fast_immutable_collections/fast_immutable_collections.dart";
+import "package:flutter_riverpod/flutter_riverpod.dart";
+import "package:nexus/controllers/client_state.dart";
+import "package:nexus/controllers/room_chat.dart";
+import "package:nexus/controllers/rooms.dart";
+import "package:nexus/controllers/settings.dart";
+import "package:nexus/helpers/extensions/is_shown_as_message.dart";
+import "package:nexus/models/read_receipt.dart";
+
+/// Other users' read receipts in a chat, by the event ID of the message to
+/// show them under: the nearest message at or before what they've read.
+class ReadReceiptsController(final ChatParams chat)
+    extends Notifier<IMap<String, IList<ReadReceipt>>> {
+  @override
+  IMap<String, IList<ReadReceipt>> build() {
+    final shouldShow = ref.watch(
+      SettingsController.provider.select(
+        (settings) => settings.value?.readReceipts != .neither,
+      ),
+    );
+    if (!shouldShow) return const .empty();
+
+    final userId = ref.watch(
+      ClientStateController.provider.select((state) => state?.userId),
+    );
+    // The chat's own timeline, so receipts follow what's actually shown
+    final timeline = ref.watch(
+      RoomChatController.provider(chat)
+          .select((roomChat) => roomChat.value?.timeline),
+    );
+    final room = ref.watch(
+      RoomsController.provider.select(
+        (rooms) => switch (rooms[chat.roomId]) {
+          final room? => (events: room.events, receipts: room.receipts),
+          null => null,
+        },
+      ),
+    );
+    if (userId == null || timeline == null || room == null) {
+      return const .empty();
+    }
+
+    final events = timeline.map((rowId) => room.events[rowId]).nonNulls;
+    final indexes = IMap.fromEntries(
+      events.indexed.map((entry) => MapEntry(entry.$2.eventId, entry.$1)),
+    );
+    final messages = events.indexed
+        .where((entry) => entry.$2.isShownAsMessage)
+        .toIList();
+    final messageIndexes = messages.map((entry) => entry.$1).toList();
+
+    return room.receipts.values.flattened
+        .where(
+          (receipt) =>
+              receipt.userId != userId &&
+              // Receipts in threads are for the thread, not the timeline
+              receipt.thread == "main",
+        )
+        .map(
+          (receipt) => switch (indexes[receipt.eventId]) {
+            final index? => (
+              receipt: receipt,
+              message: lowerBound(messageIndexes, index + 1) - 1,
+            ),
+            null => null,
+          },
+        )
+        .nonNulls
+        .where((entry) => entry.message >= 0)
+        .groupListsBy((entry) => messages[entry.message].$2.eventId)
+        .map(
+          (eventId, entries) => MapEntry(
+            eventId,
+            entries
+                .map((entry) => entry.receipt)
+                .sorted((a, b) => b.timestamp.compareTo(a.timestamp))
+                .toIList(),
+          ),
+        )
+        .toIMap();
+  }
+
+  static final provider = NotifierProvider.family
+      .autoDispose<
+        ReadReceiptsController,
+        IMap<String, IList<ReadReceipt>>,
+        ChatParams
+      >(ReadReceiptsController.new);
+}

lib/controllers/recent_emoji.dart

@@ -0,0 +1,63 @@
+import "package:collection/collection.dart";
+import "package:fast_immutable_collections/fast_immutable_collections.dart";
+import "package:flutter_riverpod/flutter_riverpod.dart";
+import "package:material_emoji_picker/material_emoji_picker.dart";
+import "package:nexus/controllers/account_data.dart";
+import "package:nexus/controllers/client.dart";
+import "package:nexus/models/account_data.dart";
+
+class RecentEmojiController extends Notifier<IList<RecentEmoji>> {
+  @override
+  IList<RecentEmoji> build() {
+    final Set<String> emoji = ref
+        .watch(EmojiController.provider)
+        .requireValue
+        .map((element) => element.emojis)
+        .flattened
+        .map((e) => e.value)
+        .toSet();
+
+    final IList<RecentEmoji> recents = ref.watch(
+      AccountDataController.provider.select(
+        (value) => value.recentEmoji.recentEmoji,
+      ),
+    );
+
+    return .new(
+      recents.where(
+        (recent) =>
+            // Is unicode or custom emote
+            emoji.contains(recent.emoji) || recent.emoji.startsWith("mxc://"),
+      ),
+    );
+  }
+
+  Future<void> add(String emoji) => ref
+      .read(ClientController.provider.notifier)
+      .setAccountData(
+        .new(
+          type: AccountData.recentEmojiKey,
+          content: RecentEmojiData(
+            recentEmoji: .new([
+              .new(
+                emoji: emoji,
+                total:
+                    (state
+                            .firstWhereOrNull(
+                              (element) => element.emoji == emoji,
+                            )
+                            ?.total ??
+                        0) +
+                    1,
+              ),
+              ...state.whereNot((element) => element.emoji == emoji),
+            ]),
+          ),
+        ),
+      );
+
+  static final provider =
+      NotifierProvider.autoDispose<RecentEmojiController, IList<RecentEmoji>>(
+        RecentEmojiController.new,
+      );
+}

lib/controllers/room_chat.dart

@@ -9,101 +9,156 @@ import "package:nexus/controllers/attachment.dart";
 import "package:nexus/controllers/client.dart";
 import "package:nexus/controllers/rooms.dart";
 import "package:nexus/models/content/content.dart";
+import "package:nexus/models/content/image_pack.dart";
 import "package:nexus/models/content/reaction.dart";
+import "package:nexus/models/content/sticker.dart";
+import "package:nexus/models/direction.dart";
 import "package:nexus/models/event.dart";
 import "package:nexus/models/requests/redact_event.dart";
 import "package:nexus/models/relation_type.dart";
 import "package:nexus/models/requests/send_message.dart";
 import "package:nexus/models/room.dart";
+import "package:nexus/models/room_chat.dart";
 
-class RoomChatController(final String roomId)
-    extends AsyncNotifier<IList<Event>?> {
+typedef ChatParams = ({String roomId, int? contextualEvent});
+
+class RoomChatController(final ChatParams info)
+    extends AsyncNotifier<RoomChat?> {
   @override
-  Future<IList<Event>?> build() async {
-    final client = ref.watch(ClientController.provider.notifier);
-    final room = ref.watch(
-      RoomsController.provider.select((rooms) => rooms[roomId]),
+  Future<RoomChat?> build() async {
+    final client = ref.read(ClientController.provider.notifier);
+
+    final room = ref.read(
+      RoomsController.provider.select((rooms) => rooms[info.roomId]),
     );
 
     if (room == null) return null;
 
     if (!room.hasFetchedState) {
-      final state = await client.getRoomState(.new(roomId: roomId));
-
-      await ref.read(RoomsController.provider.notifier).addState(roomId, state);
+      final state = await client.getRoomState(.new(roomId: info.roomId));
+      ref.read(RoomsController.provider.notifier).addState(info.roomId, state);
     }
 
-    // While there are under 20 events, try to load more
-    // until there's no more or the conditions are met.
-    if (room.hasMore && room.timeline.length < 20) {
-      loadOlder();
-    }
-
-    return room.timeline
+    final timeline = room.timeline
         .toEntryIList(compare: (a, b) => (a?.key ?? 0).compareTo(b?.key ?? 0))
-        .map((element) => element.value)
+        .map((e) => e.value)
         .toIList()
-        .addAll(room.sticky)
-        .map((entry) {
-          final foundEvent = entry == null ? null : room.events[entry];
-
-          final editedEvent =
-              foundEvent == null || foundEvent.lastEditRowId == 0
-              ? null
-              : room.events[foundEvent.lastEditRowId];
-
-          return editedEvent == null
-              ? foundEvent
-              : foundEvent?.copyWith(
-                  content: editedEvent.content,
-                  localContent: editedEvent.localContent,
-                );
-        })
+        .addAll(room.clientSticky)
         .nonNulls
         .toIList();
+    if (info.contextualEvent == null ||
+        timeline.contains(info.contextualEvent)) {
+      ref.watch(
+        RoomsController.provider.select(
+          (rooms) =>
+              (rooms[info.roomId]?.timeline, rooms[info.roomId]?.clientSticky),
+        ),
+      );
+
+      return .new(
+        timeline: timeline,
+        hasMoreBackward: room.hasMore,
+        hasMoreForward: false,
+      );
+    } else {
+      final context = await client.getEventContext(
+        .new(
+          roomId: info.roomId,
+          eventId: room.events[info.contextualEvent!]!.eventId,
+        ),
+      );
+
+      // `before` is in reverse chronological order
+      final events = context.before.reversed
+          .toIList()
+          .add(context.event)
+          .addAll(context.after);
+      ref
+          .read(RoomsController.provider.notifier)
+          .storeEvents(events.addAll(context.relatedEvents));
+      return .new(
+        timeline: .new(events.map((element) => element.rowId)),
+        hasMoreBackward: true,
+        hasMoreForward: true,
+        historicalData: .new(start: context.start, end: context.end),
+      );
+    }
   }
 
   Future<void> deleteMessage(Event event, {String? reason}) => ref
-      .watch(ClientController.provider.notifier)
+      .read(ClientController.provider.notifier)
       .redactEvent(
         RedactEventRequest(
           eventId: event.eventId,
-          roomId: roomId,
+          roomId: info.roomId,
           reason: reason,
         ),
       );
 
-  Future<bool> loadOlder() async {
-    state = AsyncLoading();
-    final timelineKeys = ref
-        .read(RoomsController.provider.select((value) => value[roomId]))
-        ?.timeline
-        .keys;
-    final response = await ref
-        .read(ClientController.provider.notifier)
-        .paginate(
-          .new(
-            roomId: roomId,
-            maxTimelineId: timelineKeys?.isNotEmpty == true
-                ? timelineKeys?.reduce(min)
-                : null,
+  void hideClientSticky(int eventRowId) => ref
+      .read(RoomsController.provider.notifier)
+      .update(
+        .new({
+          info.roomId: Room(
+            resetClientSticky: true,
+            clientSticky:
+                ref
+                    .read(
+                      RoomsController.provider.select(
+                        (rooms) => rooms[info.roomId]?.clientSticky,
+                      ),
+                    )
+                    ?.remove(eventRowId) ??
+                .new(),
           ),
-        );
+        }),
+      );
+
+  Future<void> paginate(Direction direction) async {
+    if (state.isLoading) return;
+
+    final chat = await future;
+
+    if (direction == .forward
+        ? chat?.hasMoreForward == false
+        : chat?.hasMoreBackward == false) {
+      return;
+    }
+
+    state = .loading();
+
+    final client = ref.read(ClientController.provider.notifier);
+
+    if (chat?.historicalData == null) {
+      final timelineKeys = ref
+          .read(RoomsController.provider.select((value) => value[info.roomId]))
+          ?.timeline
+          .keys;
+      final response = await client.paginate(
+        .new(
+          roomId: info.roomId,
+          maxTimelineId: timelineKeys?.isNotEmpty == true
+              ? timelineKeys?.reduce(min)
+              : null,
+        ),
+      );
+
+      if (response.events.isEmpty) {
+        state = .data(chat);
+      }
 
-    if (response.events.isEmpty) {
-      state = .data(state.value);
-    } else {
       ref
           .read(RoomsController.provider.notifier)
           .update(
             IMap({
-              roomId: Room(
+              info.roomId: Room(
                 events: IMap.fromIterable(
                   response.events.addAll(response.relatedEvents),
                   keyMapper: (event) => event.rowId,
                   valueMapper: (event) => event,
                 ),
                 hasMore: response.hasMore,
+                receipts: response.receipts,
                 timeline: IMap.fromIterable(
                   response.events,
                   keyMapper: (event) => event.timelineRowId,
@@ -111,11 +166,57 @@ class RoomChatController(final String roomId)
                 ),
               ),
             }),
-            .new(),
           );
-    }
+    } else {
+      final paginationResponse = await client.paginateManual(
+        .new(
+          roomId: info.roomId,
+          direction: direction,
+          since: direction == .forward
+              ? chat!.historicalData!.end
+              : chat!.historicalData!.start,
+        ),
+      );
 
-    return response.hasMore;
+      ref
+          .read(RoomsController.provider.notifier)
+          .storeEvents(
+            paginationResponse.events.addAll(paginationResponse.relatedEvents),
+          );
+
+      final eventRowIds =
+          (direction == .forward
+                  ? paginationResponse.events
+                  : paginationResponse.events.reversed)
+              .map((element) => element.rowId)
+              .toIList();
+
+      state = .data(
+        .new(
+          timeline: direction == .forward
+              ? chat.timeline.addAll(eventRowIds)
+              : eventRowIds.addAll(chat.timeline),
+          hasMoreForward:
+              direction == .forward && paginationResponse.nextBatch == null
+              ? false
+              : chat.hasMoreForward,
+          hasMoreBackward:
+              direction == .backward && paginationResponse.nextBatch == null
+              ? false
+              : chat.hasMoreBackward,
+          historicalData: chat.historicalData?.copyWith(
+            start:
+                (direction == .backward
+                    ? paginationResponse.nextBatch
+                    : null) ??
+                chat.historicalData!.start,
+            end:
+                (direction == .forward ? paginationResponse.nextBatch : null) ??
+                chat.historicalData!.end,
+          ),
+        ),
+      );
+    }
   }
 
   Future<void> send(
@@ -123,60 +224,62 @@ class RoomChatController(final String roomId)
     bool shouldMention = true,
     required IList<Tag> tags,
     required RelationType relationType,
-    Event? relation,
+    int? relatedEventRowId,
   }) async {
     Content? baseContent;
-    if (relationType == .edit) {
-      baseContent = relation?.content;
+    final relatedEvent = relatedEventRowId == null
+        ? null
+        : ref.read(
+            RoomsController.provider.select(
+              (rooms) => rooms[info.roomId]?.events[relatedEventRowId],
+            ),
+          );
+
+    if (relationType == .edit && relatedEventRowId != null) {
+      baseContent = relatedEvent?.content;
     } else {
-      final provider = AttachmentController.provider(roomId);
-      baseContent = ref.watch(provider)?.$2;
+      final provider = AttachmentController.provider(info.roomId);
+      baseContent = ref.read(provider)?.$2;
       ref.invalidate(provider);
     }
 
-    var taggedMessage = text;
-
-    for (final tag in tags) {
-      final escaped = RegExp.escape(tag.id);
-      final pattern = RegExp(r"@+(" + escaped + r")(#[^#]*#)?");
-
-      taggedMessage = taggedMessage.replaceAllMapped(
-        pattern,
+    // Replaces each formatted tag, like "@id#name#", with its ID
+    final taggedMessage = tags.fold(
+      text,
+      (message, tag) => message.replaceAllMapped(
+        RegExp(r"@+(" + RegExp.escape(tag.id) + r")(#[^#]*#)?"),
         (match) => match.group(1)!,
-      );
-    }
+      ),
+    );
 
-    final client = ref.watch(ClientController.provider.notifier);
+    final client = ref.read(ClientController.provider.notifier);
     final event = await client.sendMessage(
       SendMessageRequest(
-        roomId: roomId,
+        roomId: info.roomId,
         baseContent: baseContent,
         mentions: Mentions(
           userIds: [
-            if (shouldMention == true &&
-                relation != null &&
-                relationType == RelationType.reply)
-              relation.sender,
+            if (shouldMention && relatedEvent != null && relationType == .reply)
+              relatedEvent.sender,
           ].toIList(),
           room: taggedMessage.contains("@room"),
         ),
         text: taggedMessage,
-        relation: relation == null
+        relation: relatedEvent == null
             ? null
-            : .new(eventId: relation.eventId, relationType: relationType),
+            : .new(eventId: relatedEvent.eventId, relationType: relationType),
       ),
     );
 
     ref
-        .watch(RoomsController.provider.notifier)
+        .read(RoomsController.provider.notifier)
         .update(
           .new({
-            roomId: .new(
+            info.roomId: .new(
               events: .new({event.rowId: event}),
-              sticky: .new({event.rowId}),
+              clientSticky: .new({event.rowId}),
             ),
           }),
-          .new(),
         );
   }
 
@@ -185,42 +288,50 @@ class RoomChatController(final String roomId)
     Event event,
     String userId,
   ) async {
-    final client = ref.watch(ClientController.provider.notifier);
+    final client = ref.read(ClientController.provider.notifier);
     final allReactionEvents = await client.getRelatedEvents(
       .new(
-        roomId: roomId,
+        roomId: info.roomId,
         eventId: event.eventId,
         relationType: "m.annotation",
       ),
     );
 
-    final reactionEvents = allReactionEvents
-        ?.where((event) => event.redactedBy == null)
-        .toIList();
-
-    final reactionEvent = reactionEvents?.firstWhereOrNull(
-      (event) => switch (event.content) {
-        ReactionContent(:final key) =>
-          key == reaction && event.sender == userId,
-        _ => false,
-      },
+    final reactionEvent = allReactionEvents?.firstWhereOrNull(
+      (event) =>
+          event.redactedBy == null &&
+          switch (event.content) {
+            ReactionContent(:final key) =>
+              key == reaction && event.sender == userId,
+            _ => false,
+          },
     );
 
     if (reactionEvent != null) {
-      await ref
-          .watch(ClientController.provider.notifier)
-          .redactEvent(.new(eventId: reactionEvent.eventId, roomId: roomId));
+      await client.redactEvent(
+        .new(eventId: reactionEvent.eventId, roomId: info.roomId),
+      );
     }
   }
 
-  Future<void> sendReaction(String reaction, Event event) async {
-    final client = ref.watch(ClientController.provider.notifier);
+  /// Reacts to [event] with [reaction], which is an mxc URL for custom emoji,
+  /// with their [shortcode].
+  Future<void> sendReaction(
+    String reaction,
+    Event event, {
+    String? shortcode,
+  }) async {
+    final client = ref.read(ClientController.provider.notifier);
 
     await client.sendEvent(
       .new(
-        roomId: roomId,
+        roomId: info.roomId,
         type: EventType.reaction.type,
-        content: ReactionContent(key: reaction),
+        // Wrapped in colons, like other clients send it
+        content: ReactionContent(
+          key: reaction,
+          shortcode: shortcode == null ? null : ":$shortcode:",
+        ),
         synchronous: true,
         disableEncryption: true,
         relatesTo: event.eventId,
@@ -229,8 +340,35 @@ class RoomChatController(final String roomId)
     );
   }
 
+  Future<void> sendSticker(String shortcode, PackImage image) async {
+    final event = await ref
+        .read(ClientController.provider.notifier)
+        .sendEvent(
+          .new(
+            roomId: info.roomId,
+            type: EventType.sticker.type,
+            content: StickerContent(
+              body: image.body ?? shortcode,
+              info: image.info ?? const .new(),
+              url: image.url,
+            ),
+          ),
+        );
+
+    ref
+        .read(RoomsController.provider.notifier)
+        .update(
+          .new({
+            info.roomId: .new(
+              events: .new({event.rowId: event}),
+              clientSticky: .new({event.rowId}),
+            ),
+          }),
+        );
+  }
+
   static final provider = AsyncNotifierProvider.family
-      .autoDispose<RoomChatController, IList<Event>?, String>(
+      .autoDispose<RoomChatController, RoomChat?, ChatParams>(
         RoomChatController.new,
       );
 }

lib/controllers/room_creators.dart

@@ -1,30 +0,0 @@
-import "package:fast_immutable_collections/fast_immutable_collections.dart";
-import "package:flutter_riverpod/flutter_riverpod.dart";
-import "package:nexus/models/content/content.dart";
-import "package:nexus/models/content/create.dart";
-import "package:nexus/models/room.dart";
-
-class RoomCreatorsController(final Room room) extends Notifier<IList<String>> {
-  @override
-  IList<String> build() {
-    final createRowId = room.state[EventType.create.type]?[""];
-    final createEvent = createRowId == null ? null : room.events[createRowId];
-
-    if (createEvent == null) return .new();
-
-    final createEventContent = switch (createEvent.content) {
-      CreateContent content => content,
-      _ => null,
-    };
-
-    return switch (createEventContent?.additionalCreatorIds) {
-      IList<String> creators => creators.add(createEvent.sender),
-      _ => .new([createEvent.sender]),
-    };
-  }
-
-  static final provider =
-      NotifierProvider.family<RoomCreatorsController, IList<String>, Room>(
-        RoomCreatorsController.new,
-      );
-}

lib/controllers/room_power_levels.dart

@@ -0,0 +1,59 @@
+import "package:fast_immutable_collections/fast_immutable_collections.dart";
+import "package:flutter_riverpod/flutter_riverpod.dart";
+import "package:nexus/controllers/rooms.dart";
+import "package:nexus/models/content/content.dart";
+import "package:nexus/models/content/create.dart";
+import "package:nexus/models/content/power_levels.dart";
+import "package:nexus/models/event.dart";
+import "package:nexus/models/room_power_levels.dart";
+
+class RoomPowerLevelsController(final String roomId)
+    extends Notifier<RoomPowerLevels> {
+  @override
+  RoomPowerLevels build() {
+    final room = ref.watch(
+      RoomsController.provider.select((rooms) => rooms[roomId]),
+    );
+
+    Event? stateEvent(EventType type) => switch (room?.state[type.type]?[""]) {
+      final rowId? => room?.events[rowId],
+      null => null,
+    };
+
+    final createEvent = stateEvent(.create);
+    final create = switch (createEvent?.content) {
+      final CreateContent content => content,
+      _ => null,
+    };
+    // Creators only outrank everyone from room version 12, earlier ones just have a power level
+    final creatorsPrivileged =
+        (int.tryParse(create?.roomVersion ?? "") ?? 0) >= 12;
+
+    return .new(
+      content: switch (stateEvent(.powerLevels)?.content) {
+        final PowerLevelsContent content => content,
+        // Until there are power levels, creators have 100
+        _ => PowerLevelsContent(
+          users: switch (createEvent) {
+            final createEvent? when !creatorsPrivileged => .new({
+              createEvent.sender: 100,
+            }),
+            _ => const .empty(),
+          },
+        ),
+      },
+      creators: switch (createEvent) {
+        final createEvent? when creatorsPrivileged =>
+          (create?.additionalCreatorIds ?? const .empty())
+              .add(createEvent.sender)
+              .toISet(),
+        _ => const .empty(),
+      },
+    );
+  }
+
+  static final provider = NotifierProvider.autoDispose
+      .family<RoomPowerLevelsController, RoomPowerLevels, String>(
+        RoomPowerLevelsController.new,
+      );
+}

lib/controllers/room_settings_sections.dart

@@ -0,0 +1,830 @@
+import "package:fast_immutable_collections/fast_immutable_collections.dart";
+import "package:flutter_hooks/flutter_hooks.dart";
+import "package:hooks_riverpod/hooks_riverpod.dart";
+import "package:material_ui/material_ui.dart";
+import "package:nexus/controllers/client.dart";
+import "package:nexus/controllers/client_state.dart";
+import "package:nexus/controllers/local_aliases.dart";
+import "package:nexus/controllers/power_level.dart";
+import "package:nexus/controllers/power_levels_saving.dart";
+import "package:nexus/controllers/room_power_levels.dart";
+import "package:nexus/controllers/rooms.dart";
+import "package:nexus/controllers/space_edges.dart";
+import "package:nexus/helpers/extensions/show_adaptive_sheet.dart";
+import "package:nexus/helpers/extensions/join_rule_name.dart";
+import "package:nexus/helpers/file_dialog_helper.dart";
+import "package:nexus/helpers/hooks/saving.dart";
+import "package:nexus/main.dart";
+import "package:nexus/models/content/avatar.dart";
+import "package:nexus/models/content/canonical_alias.dart";
+import "package:nexus/models/content/content.dart";
+import "package:nexus/models/content/create.dart";
+import "package:nexus/models/content/encryption.dart";
+import "package:nexus/models/content/history_visibility.dart";
+import "package:nexus/models/content/join_rules.dart";
+import "package:nexus/models/content/membership.dart";
+import "package:nexus/models/content/message.dart";
+import "package:nexus/models/content/name.dart";
+import "package:nexus/models/content/power_levels.dart";
+import "package:nexus/models/content/topic.dart";
+import "package:nexus/models/join_rule.dart";
+import "package:nexus/models/power_level_permission.dart";
+import "package:nexus/models/setting.dart";
+import "package:nexus/models/settings_category.dart";
+import "package:nexus/widgets/avatar_or_hash.dart";
+import "package:nexus/widgets/divider_text.dart";
+import "package:nexus/widgets/settings/add_users_power_level_sheet.dart";
+import "package:nexus/widgets/settings/aliases_sheet.dart";
+import "package:nexus/widgets/settings/allowed_rooms_sheet.dart";
+import "package:nexus/widgets/settings/dialog_list_tile.dart";
+import "package:nexus/widgets/settings/local_aliases_sheet.dart";
+import "package:nexus/widgets/settings/power_level_entry_sheet.dart";
+import "package:nexus/widgets/settings/power_level_tile.dart";
+import "package:nexus/widgets/settings/text_setting_tile.dart";
+
+class RoomSettingsSectionsController(final String roomId)
+    extends AsyncNotifier<IMap<String, IList<SettingsCategory>>> {
+  @override
+  Future<IMap<String, IList<SettingsCategory>>> build() async {
+    final (:state, :metadataTopic, :metadataAvatar) = ref.watch(
+      RoomsController.provider.select((rooms) {
+        final room = rooms[roomId];
+        return (
+          state: room?.state ?? const IMap.empty(),
+          metadataTopic: room?.metadata?.topic,
+          metadataAvatar: room?.metadata?.avatar,
+        );
+      }),
+    );
+
+    Content? contentOf(int rowId) =>
+        ref.read(RoomsController.provider)[roomId]?.events[rowId]?.content;
+    final client = ref.read(ClientController.provider.notifier);
+    final roomsController = ref.read(RoomsController.provider.notifier);
+
+    // The room's own state, rather than metadata like a name made up from
+    // its members when it has none
+    Content? stateContent(EventType type) => switch (state[type.type]?[""]) {
+      final rowId? => contentOf(rowId),
+      null => null,
+    };
+    final name = switch (stateContent(.name)) {
+      NameContent(:final name) => name,
+      _ => null,
+    };
+    final topic = switch (stateContent(.topic)) {
+      TopicContent(:final topic) => topic,
+      _ => metadataTopic,
+    };
+    final avatar = switch (stateContent(.avatar)) {
+      AvatarContent(:final url) => url,
+      _ => metadataAvatar,
+    };
+
+    bool canSet(EventType type) => ref.watch(
+      PowerLevelController.provider(.state(eventType: type, roomId: roomId)),
+    );
+
+    final canSetAvatar = canSet(.avatar);
+    final canSetName = canSet(.name);
+    final canSetTopic = canSet(.topic);
+    final canSetJoinRules = canSet(.joinRules);
+    final canSetHistoryVisibility = canSet(.historyVisibility);
+    final canSetAliases = canSet(.canonicalAlias);
+    final canSetPowerLevels =
+        canSet(.powerLevels) &&
+        !ref.watch(PowerLevelsSavingController.provider(roomId));
+
+    final joinRules = switch (stateContent(.joinRules)) {
+      final JoinRulesContent content => content,
+      _ => JoinRulesContent(joinRule: .invite),
+    };
+    final historyVisibility = switch (stateContent(.historyVisibility)) {
+      HistoryVisibilityContent(:final historyVisibility) => historyVisibility,
+      _ => HistoryVisibility.shared,
+    };
+    final canonicalAlias = switch (stateContent(.canonicalAlias)) {
+      final CanonicalAliasContent content => content,
+      _ => CanonicalAliasContent(),
+    };
+    final published = canonicalAlias.altAliases.addAll([?canonicalAlias.alias]);
+    final localAliases =
+        ref.watch(LocalAliasesController.provider(roomId)).value ??
+        const IList<String>.empty();
+
+    final knownAliases = localAliases.addAll(canonicalAlias.altAliases).addAll([
+      ?canonicalAlias.alias,
+    ]).toISet();
+
+    final roomVersion = switch (stateContent(.create)) {
+      CreateContent(:final roomVersion) => int.tryParse(roomVersion),
+      _ => null,
+    };
+    bool versionAtLeast(int version) =>
+        roomVersion == null || roomVersion >= version;
+    final joinRuleOptions = [
+      JoinRule.public,
+      JoinRule.invite,
+      if (versionAtLeast(7)) JoinRule.knock,
+      if (versionAtLeast(8)) JoinRule.restricted,
+      if (versionAtLeast(10)) JoinRule.knockRestricted,
+    ];
+    bool isRestricted(JoinRule rule) =>
+        rule == .restricted || rule == .knockRestricted;
+
+    final parentSpaces = ref
+        .watch(
+          SpaceEdgesController.provider.select(
+            (edges) => edges.entries
+                .where(
+                  (entry) => entry.value.any((edge) => edge.childId == roomId),
+                )
+                .map((entry) => entry.key)
+                .toIList(),
+          ),
+        )
+        .addAll(state["m.space.parent"]?.keys ?? const [])
+        .toISet();
+    final allowedRooms = joinRules.allow
+        .map((condition) => condition.roomId)
+        .nonNulls
+        .toISet();
+
+    final roomPowerLevels = ref.watch(
+      RoomPowerLevelsController.provider(roomId),
+    );
+    final powerLevels = roomPowerLevels.content;
+    final userId = ref.watch(
+      ClientStateController.provider.select((state) => state?.userId),
+    );
+    final ownLevel = userId == null ? 0.0 : roomPowerLevels.levelOf(userId);
+    final encrypted = stateContent(.encryption) is EncryptionContent;
+    final shownEvents = PowerLevelEvent.shownIn(encrypted: encrypted);
+
+    Future<void> setState(EventType type, Content content) async {
+      final eventId = await client.setState(
+        .new(roomId: roomId, type: type.type, stateKey: "", content: content),
+      );
+      if (eventId case final eventId?) {
+        await roomsController.awaitState(roomId, type.type, eventId);
+      }
+    }
+
+    Future<void> setAliases(
+      String? canonical,
+      ISet<String> alternatives,
+    ) async {
+      final stale = (await Future.wait(
+        alternatives.addAll([?canonical]).map((alias) async {
+          try {
+            return await client.resolveAlias(alias) == roomId ? null : alias;
+          } catch (_) {
+            return null;
+          }
+        }),
+      )).nonNulls.toISet();
+      bool kept(String alias) => !stale.contains(alias);
+
+      await setState(
+        .canonicalAlias,
+        CanonicalAliasContent(
+          alias: canonical != null && kept(canonical) ? canonical : null,
+          altAliases: alternatives.where(kept).toISet(),
+        ),
+      );
+    }
+
+    Future<void> setAllowedRooms(ISet<String> roomIds) => setState(
+      .joinRules,
+      joinRules.copyWith(
+        allow: roomIds
+            .map((roomId) => AllowCondition(roomId: roomId, type: .membership))
+            .toISet(),
+      ),
+    );
+
+    Setting header(String title, String description, IconData icon) => .new(
+      title: title,
+      description: description,
+      icon: icon,
+      builder: (title, _, _) => Padding(
+        padding: .symmetric(horizontal: 16),
+        child: DividerText(title),
+      ),
+    );
+
+    Future<void> setPowerLevels(PowerLevelsContent content) => ref
+        .read(PowerLevelsSavingController.provider(roomId).notifier)
+        .run(() => setState(.powerLevels, content).onError(showError));
+
+    // Event types with their own level that don't have a setting of their own
+    final listedEvents = shownEvents
+        .addAll(PowerLevelGroup.values.expand((group) => group.events))
+        .map((event) => event.type.type)
+        .toISet();
+    final otherEvents = powerLevels.events.entries
+        .where((entry) => !listedEvents.contains(entry.key))
+        .toIList()
+        .sort((a, b) => a.key.compareTo(b.key));
+
+    // Users with their own level, the highest first
+    final users = powerLevels.users.entries.toIList().sort(
+      (a, b) => switch (b.value.compareTo(a.value)) {
+        0 => a.key.compareTo(b.key),
+        final order => order,
+      },
+    );
+    MembershipContent? memberOf(String userId) =>
+        switch (state[EventType.membership.type]?[userId]) {
+          final rowId? => switch (contentOf(rowId)) {
+            final MembershipContent content => content,
+            _ => null,
+          },
+          null => null,
+        };
+
+    /// A tile opening a [sheet] to add entries, like event types or users, with their own power level.
+    Setting addSetting({
+      required String title,
+      required String description,
+      required Widget Function(void Function(PowerLevelsContent content) save)
+      sheet,
+    }) => .new(
+      title: title,
+      description: description,
+      icon: Icons.add,
+      builder: (title, description, icon) => Builder(
+        builder: (context) => ListTile(
+          enabled: canSetPowerLevels,
+          leading: Icon(icon),
+          title: Text(title),
+          subtitle: Text(description),
+          onTap: () => context.showAdaptiveSheet((_) => sheet(setPowerLevels)),
+        ),
+      ),
+    );
+
+    Setting powerLevelSetting({
+      required String title,
+      required String description,
+      required IconData icon,
+      required int value,
+      required PowerLevelsContent Function(int level) update,
+    }) => .new(
+      title: title,
+      description: description,
+      icon: icon,
+      builder: (title, description, icon) => PowerLevelTile(
+        leading: Icon(icon),
+        title: title,
+        description: description,
+        value: value,
+        ownLevel: ownLevel,
+        onChanged: canSetPowerLevels
+            ? (level) => setPowerLevels(update(level))
+            : null,
+      ),
+    );
+
+    Setting permissionSetting(PowerLevelPermission permission) =>
+        powerLevelSetting(
+          title: permission.title,
+          description: permission.description,
+          icon: permission.icon,
+          value: permission.levelIn(powerLevels),
+          update: (level) => permission.withLevel(powerLevels, level),
+        );
+
+    /// A setting for the level needed to send [event], which otherwise needs [fallback].
+    Setting eventSetting(PowerLevelEvent event, {required int fallback}) =>
+        powerLevelSetting(
+          title: event.title,
+          description: event.description,
+          icon: event.icon,
+          value: powerLevels.events[event.type.type] ?? fallback,
+          update: (level) => powerLevels.copyWith(
+            events: powerLevels.events.add(event.type.type, level),
+          ),
+        );
+
+    Widget tileOf(Setting setting) =>
+        setting.builder(setting.title, setting.description, setting.icon);
+
+    /// A setting for all of [group]'s levels at once, which expands to set each.
+    Setting groupSetting(PowerLevelGroup group) => .new(
+      title: group.title,
+      description: group.description,
+      icon: group.icon,
+      builder: (title, description, icon) => HookBuilder(
+        builder: (context) {
+          final expanded = useState(false);
+
+          return Column(
+            mainAxisSize: .min,
+            children: [
+              PowerLevelTile(
+                leading: Icon(icon),
+                title: title,
+                description: description,
+                value: group.levelIn(powerLevels),
+                ownLevel: ownLevel,
+                // Changing it would change levels above the user's own
+                onChanged:
+                    canSetPowerLevels &&
+                        group.highestIn(powerLevels) <= ownLevel
+                    ? (level) =>
+                          setPowerLevels(group.withLevel(powerLevels, level))
+                    : null,
+                trailing: IconButton(
+                  tooltip: expanded.value ? "Collapse" : "Set each",
+                  icon: AnimatedRotation(
+                    turns: expanded.value ? 0.5 : 0,
+                    duration: Durations.medium2,
+                    child: Icon(Icons.expand_more),
+                  ),
+                  onPressed: () => expanded.value = !expanded.value,
+                ),
+              ),
+              AnimatedSize(
+                duration: Durations.medium2,
+                curve: Curves.easeInOut,
+                alignment: .topCenter,
+                child: expanded.value
+                    ? Padding(
+                        padding: .only(left: 16),
+                        child: Column(
+                          mainAxisSize: .min,
+                          children: [
+                            ...group.permissions
+                                .map(permissionSetting)
+                                .map(tileOf),
+                            ...group.events
+                                .map(
+                                  (event) => eventSetting(
+                                    event,
+                                    fallback: powerLevels.stateDefault,
+                                  ),
+                                )
+                                .map(tileOf),
+                          ],
+                        ),
+                      )
+                    : const SizedBox(width: .infinity),
+              ),
+            ],
+          );
+        },
+      ),
+    );
+
+    return .new({
+      "Room": .new([
+        .new(
+          title: "General",
+          icon: Icons.tune,
+          settings: .new([
+            .new(
+              title: "Avatar",
+              description: "The image shown for the room.",
+              icon: Icons.image,
+              builder: (title, description, icon) => HookBuilder(
+                builder: (context) {
+                  final saving = Saving.use();
+                  Future<void> save(Future<void> Function() action) =>
+                      saving.run(() => action().onError(showError));
+
+                  return ListTile(
+                    enabled: canSetAvatar && !saving.active,
+                    leading: Icon(icon),
+                    title: Text(title),
+                    subtitle: Text(description),
+                    trailing: Row(
+                      mainAxisSize: .min,
+                      spacing: 8,
+                      children: [
+                        AvatarOrHash(
+                          avatar,
+                          name ?? "Unnamed Room",
+                          dimension: 40,
+                          fallback: Icon(Icons.numbers),
+                        ),
+                        if (avatar != null && canSetAvatar)
+                          IconButton(
+                            tooltip: "Remove avatar",
+                            icon: Icon(Icons.delete),
+                            onPressed: saving.active
+                                ? null
+                                : () => save(
+                                    () => setState(.avatar, const .new()),
+                                  ),
+                          ),
+                      ],
+                    ),
+                    onTap: () async {
+                      final file = await ProviderScope.containerOf(context)
+                          .read(FileDialogHelper.provider)
+                          .pickFile(images: true);
+                      if (file == null || !context.mounted) return;
+
+                      await save(() async {
+                        final content = await client.uploadMedia(
+                          .new(path: file.path, encrypt: false),
+                        );
+                        if (content case ImageMessageContent(
+                          :final url,
+                          :final info,
+                        )) {
+                          await setState(
+                            .avatar,
+                            AvatarContent(url: url, info: info),
+                          );
+                        } else {
+                          throw Exception("The file isn't an image");
+                        }
+                      });
+                    },
+                  );
+                },
+              ),
+            ),
+            .new(
+              title: "Room Name",
+              description: "The name shown for the room.",
+              icon: Icons.title,
+              builder: (title, description, icon) => TextSettingTile(
+                icon: Icon(icon),
+                title: title,
+                description: description,
+                value: name,
+                onChanged: canSetName
+                    ? (value) => setState(
+                        .name,
+                        NameContent(name: value),
+                      ).onError(showError)
+                    : null,
+              ),
+            ),
+            .new(
+              title: "Topic",
+              description: "A short description of the room.",
+              icon: Icons.info,
+              builder: (title, description, icon) => TextSettingTile(
+                icon: Icon(icon),
+                title: title,
+                description: description,
+                value: topic,
+                multiline: true,
+                onChanged: canSetTopic
+                    ? (value) => setState(
+                        .topic,
+                        TopicContent(
+                          topic: value,
+                          content: .new(
+                            representations: .new([.new(body: value)]),
+                          ),
+                        ),
+                      ).onError(showError)
+                    : null,
+              ),
+            ),
+          ]),
+        ),
+        .new(
+          title: "Access",
+          icon: Icons.key,
+          settings: .new([
+            .new(
+              title: "Join Rule",
+              description: "Who can join the room.",
+              icon: Icons.login,
+              builder: (title, description, icon) => DialogListTile<JoinRule>(
+                icon: Icon(icon),
+                title: title,
+                subtitle: Text(description),
+                value: joinRules.joinRule,
+                options: joinRuleOptions,
+                getName: (rule) => rule.displayName,
+                onChanged: canSetJoinRules
+                    ? (rule) => setState(
+                        .joinRules,
+                        JoinRulesContent(
+                          joinRule: rule,
+                          allow: isRestricted(rule) && joinRules.allow.isEmpty
+                              ? .new(
+                                  parentSpaces.map(
+                                    (roomId) =>
+                                        .new(roomId: roomId, type: .membership),
+                                  ),
+                                )
+                              : joinRules.allow,
+                        ),
+                      ).onError(showError)
+                    : null,
+              ),
+            ),
+            if (isRestricted(joinRules.joinRule))
+              .new(
+                title: "Allowed Rooms",
+                description:
+                    "Members of these rooms can join without an invite.",
+                icon: Icons.meeting_room,
+                builder: (title, description, icon) => HookConsumer(
+                  builder: (context, ref, _) {
+                    final saving = Saving.use();
+                    final names = ref.watch(
+                      RoomsController.provider.select(
+                        (rooms) => allowedRooms
+                            .map(
+                              (roomId) =>
+                                  rooms[roomId]?.metadata?.name ?? roomId,
+                            )
+                            .toIList(),
+                      ),
+                    );
+
+                    return ListTile(
+                      enabled: canSetJoinRules && !saving.active,
+                      leading: Icon(icon),
+                      title: Text(title),
+                      subtitle: Text(
+                        names.isEmpty
+                            ? "None, so only invited users can join"
+                            : names.join(", "),
+                        maxLines: 2,
+                        overflow: .ellipsis,
+                      ),
+                      onTap: () => context.showAdaptiveSheet(
+                        (_) => AllowedRoomsSheet(
+                          roomId: roomId,
+                          allowed: allowedRooms,
+                          parentSpaces: parentSpaces,
+                          onSave: (allowed) => saving.run(
+                            () => setAllowedRooms(allowed).onError(showError),
+                          ),
+                        ),
+                      ),
+                    );
+                  },
+                ),
+              ),
+            .new(
+              title: "Aliases",
+              description:
+                  "The addresses the room advertises, and its main one.",
+              icon: Icons.alternate_email,
+              builder: (title, description, icon) => HookBuilder(
+                builder: (context) {
+                  final saving = Saving.use();
+
+                  return ListTile(
+                    enabled: canSetAliases && !saving.active,
+                    leading: Icon(icon),
+                    title: Text(title),
+                    subtitle: Text(
+                      switch ((
+                        canonicalAlias.alias,
+                        canonicalAlias.altAliases.length,
+                      )) {
+                        (null, 0) => description,
+                        (final alias?, 0) => alias,
+                        (final alias?, 1) =>
+                          "$alias and ${canonicalAlias.altAliases.first}",
+                        (final alias?, final others) =>
+                          "$alias and $others more",
+                        (null, _) => canonicalAlias.altAliases.join(", "),
+                      },
+                      maxLines: 2,
+                      overflow: .ellipsis,
+                    ),
+                    onTap: () => context.showAdaptiveSheet(
+                      (_) => AliasesSheet(
+                        aliases: knownAliases,
+                        canonical: canonicalAlias.alias,
+                        alternatives: canonicalAlias.altAliases,
+                        onSave: (canonical, alternatives) => saving.run(
+                          () => setAliases(
+                            canonical,
+                            alternatives,
+                          ).onError(showError),
+                        ),
+                      ),
+                    ),
+                  );
+                },
+              ),
+            ),
+            .new(
+              title: "Local Aliases",
+              description: "Addresses for the room on your server.",
+              icon: Icons.dns,
+              builder: (title, description, icon) => Builder(
+                builder: (context) => ListTile(
+                  leading: Icon(icon),
+                  title: Text(title),
+                  subtitle: Text(
+                    localAliases.isEmpty
+                        ? description
+                        : localAliases.join(", "),
+                    maxLines: 2,
+                    overflow: .ellipsis,
+                  ),
+                  onTap: () => context.showAdaptiveSheet(
+                    (_) => LocalAliasesSheet(
+                      roomId,
+                      onRemoved: canSetAliases
+                          ? (alias) async {
+                              if (published.contains(alias)) {
+                                await setAliases(
+                                  canonicalAlias.alias,
+                                  canonicalAlias.altAliases,
+                                );
+                              }
+                            }
+                          : null,
+                    ),
+                  ),
+                ),
+              ),
+            ),
+            .new(
+              title: "History Visibility",
+              description:
+                  "Which messages from before joining members can read.",
+              icon: Icons.history,
+              builder: (title, description, icon) =>
+                  DialogListTile<HistoryVisibility>(
+                    icon: Icon(icon),
+                    title: title,
+                    subtitle: Text(description),
+                    value: historyVisibility,
+                    options: [.shared, .invited, .joined],
+                    getName: (visibility) => switch (visibility) {
+                      .shared => "All events",
+                      .invited => "After invite",
+                      .joined => "After join",
+                      .worldReadable => "Anyone",
+                      .unknown => "Unknown",
+                    },
+                    onChanged: canSetHistoryVisibility
+                        ? (visibility) => setState(
+                            .historyVisibility,
+                            HistoryVisibilityContent(
+                              historyVisibility: visibility,
+                            ),
+                          ).onError(showError)
+                        : null,
+                  ),
+            ),
+          ]),
+        ),
+        .new(
+          title: "Permissions",
+          icon: Icons.admin_panel_settings,
+          settings: .new([
+            permissionSetting(.usersDefault),
+            header("Users", "Power levels of specific users.", Icons.group),
+            ...users.map((entry) {
+              final member = memberOf(entry.key);
+              // Others can only be changed if they're below you, but your own level can be lowered
+              final canChange =
+                  canSetPowerLevels &&
+                  (entry.key == userId || entry.value < ownLevel);
+
+              return Setting(
+                title: member?.displayName ?? entry.key,
+                description: entry.key,
+                icon: Icons.person,
+                builder: (title, description, _) => PowerLevelTile(
+                  leading: AvatarOrHash(
+                    member?.avatarUrl,
+                    title,
+                    dimension: 40,
+                  ),
+                  title: title,
+                  description: description,
+                  value: entry.value,
+                  ownLevel: ownLevel,
+                  onChanged: canChange
+                      ? (level) => setPowerLevels(
+                          powerLevels.copyWith(
+                            users: powerLevels.users.add(entry.key, level),
+                          ),
+                        )
+                      : null,
+                  onRemoved: canChange
+                      ? () => setPowerLevels(
+                          powerLevels.copyWith(
+                            users: powerLevels.users.remove(entry.key),
+                          ),
+                        )
+                      : null,
+                  removeConfirmation: entry.key == userId
+                      ? "Remove your own power level? You'll have the default of ${powerLevels.usersDefault}, and won't be able to raise it again yourself."
+                      : "Remove $title's power level? They'll have the default of ${powerLevels.usersDefault}.",
+                ),
+              );
+            }),
+            addSetting(
+              title: "Add Users",
+              description: "Give users their own power level.",
+              sheet: (save) => AddUsersPowerLevelSheet(
+                roomId: roomId,
+                existing: powerLevels.users.keys.toISet().union(
+                  roomPowerLevels.creators,
+                ),
+                ownLevel: ownLevel,
+                onSave: (users, level) => save(
+                  powerLevels.copyWith(
+                    users: powerLevels.users.addEntries(
+                      users.map((user) => MapEntry(user, level)),
+                    ),
+                  ),
+                ),
+              ),
+            ),
+            header(
+              "Groups",
+              "Power levels set together, which can each be set on their own.",
+              Icons.workspaces,
+            ),
+            ...PowerLevelGroup.values.map(groupSetting),
+            header(
+              "Regular Events",
+              "Power levels needed to send messages and other timeline events.",
+              Icons.chat,
+            ),
+            ...shownEvents
+                .where((event) => event != .pinnedEvents)
+                .map(
+                  (event) =>
+                      eventSetting(event, fallback: powerLevels.eventsDefault),
+                ),
+            permissionSetting(.eventsDefault),
+            header(
+              "State Events",
+              "Power levels needed to change the room's state.",
+              Icons.settings,
+            ),
+            permissionSetting(.invite),
+            permissionSetting(.stateDefault),
+            header(
+              "Other Events",
+              "Power levels for specific event types.",
+              Icons.code,
+            ),
+            ...otherEvents.map(
+              (entry) => Setting(
+                title: entry.key,
+                description: "The power level needed to send this event.",
+                icon: Icons.code,
+                builder: (title, _, icon) => PowerLevelTile(
+                  leading: Icon(icon),
+                  title: title,
+                  description: null,
+                  value: entry.value,
+                  ownLevel: ownLevel,
+                  onChanged: canSetPowerLevels
+                      ? (level) => setPowerLevels(
+                          powerLevels.copyWith(
+                            events: powerLevels.events.add(entry.key, level),
+                          ),
+                        )
+                      : null,
+                  onRemoved: canSetPowerLevels
+                      ? () => setPowerLevels(
+                          powerLevels.copyWith(
+                            events: powerLevels.events.remove(entry.key),
+                          ),
+                        )
+                      : null,
+                ),
+              ),
+            ),
+            addSetting(
+              title: "Add Event",
+              description: "Give an event type its own power level.",
+              sheet: (save) => PowerLevelEntrySheet(
+                title: "Add Event",
+                keyLabel: "Event type",
+                keyHint: "m.room.name",
+                ownLevel: ownLevel,
+                onSave: (type, level) => save(
+                  powerLevels.copyWith(
+                    events: powerLevels.events.add(type, level),
+                  ),
+                ),
+              ),
+            ),
+          ]),
+        ),
+      ]),
+    });
+  }
+
+  static final provider = AsyncNotifierProvider.family
+      .autoDispose<
+        RoomSettingsSectionsController,
+        IMap<String, IList<SettingsCategory>>,
+        String
+      >(RoomSettingsSectionsController.new);
+}

lib/controllers/room_summary.dart

@@ -7,7 +7,7 @@ class RoomSummaryController(final JoinRoomRequest request)
     extends AsyncNotifier<RoomSummary> {
   @override
   Future<RoomSummary> build() =>
-      ref.watch(ClientController.provider.notifier).getRoomSummary(request);
+      ref.read(ClientController.provider.notifier).getRoomSummary(request);
 
   static final provider = AsyncNotifierProvider.family
       .autoDispose<RoomSummaryController, RoomSummary, JoinRoomRequest>(

lib/controllers/room_typing.dart

@@ -0,0 +1,34 @@
+import "package:fast_immutable_collections/fast_immutable_collections.dart";
+import "package:flutter_riverpod/flutter_riverpod.dart";
+import "package:nexus/controllers/client_state.dart";
+import "package:nexus/controllers/settings.dart";
+import "package:nexus/controllers/typing.dart";
+
+/// The other users typing in a room, or none if typing indicators are hidden
+/// in settings.
+class RoomTypingController(final String roomId)
+    extends Notifier<IList<String>> {
+  @override
+  IList<String> build() {
+    final shouldShow = ref.watch(
+      SettingsController.provider.select(
+        (settings) => settings.value?.typingIndicators != .neither,
+      ),
+    );
+    if (!shouldShow) return const .empty();
+
+    final userId = ref.watch(
+      ClientStateController.provider.select((state) => state?.userId),
+    );
+
+    return ref
+            .watch(TypingController.provider.select((typing) => typing[roomId]))
+            ?.remove(userId ?? "") ??
+        const .empty();
+  }
+
+  static final provider = NotifierProvider.family
+      .autoDispose<RoomTypingController, IList<String>, String>(
+        RoomTypingController.new,
+      );
+}

lib/controllers/rooms.dart

@@ -1,42 +1,91 @@
-import "dart:isolate";
+import "dart:async";
+
+import "package:collection/collection.dart";
 import "package:fast_immutable_collections/fast_immutable_collections.dart";
 import "package:flutter_riverpod/flutter_riverpod.dart";
 import "package:nexus/models/event.dart";
+import "package:nexus/models/read_receipt.dart";
 import "package:nexus/models/room.dart";
 
 class RoomsController extends Notifier<IMap<String, Room>> {
   @override
   IMap<String, Room> build() => .new();
 
-  Future<void> addState(
-    String roomId,
-    IList<Event> state, {
-    bool isMembers = false,
-  }) async => update(
-    .new({
-      roomId: Room(
-        events: .fromEntries(state.map((event) => .new(event.rowId, event))),
-        hasFetchedState: true,
-        hasFetchedMembers: isMembers,
-        state: await Isolate.run(() {
-          final newState = state.fold<IMap<String, IMap<String, int>>>(
-            .new(),
-            (previousValue, stateEvent) => previousValue.add(
-              stateEvent.type,
-              (previousValue[stateEvent.type] ?? .new()).add(
-                stateEvent.stateKey!,
-                stateEvent.rowId,
-              ),
-            ),
-          );
-          return newState;
+  void addState(String roomId, IList<Event> state, {bool isMembers = false}) =>
+      update(
+        .new({
+          roomId: stateRoom(state)
+              .copyWith(hasFetchedState: true, hasFetchedMembers: isMembers),
         }),
-      ),
-    }),
-    .new(),
+        .new(),
+      );
+
+  void addSpecificState(Iterable<Event> state) => update(
+    .new(
+      state
+          .groupListsBy((event) => event.roomId)
+          .map((roomId, roomState) => .new(roomId, stateRoom(roomState))),
+    ),
   );
 
-  void update(IMap<String, Room> rooms, ISet<String> leftRooms) {
+  static Room stateRoom(Iterable<Event> state) => Room(
+    events: .fromEntries(state.map((event) => .new(event.rowId, event))),
+    state: .new(
+      state
+          .groupListsBy((event) => event.type)
+          .map(
+            (type, group) => .new(
+              type,
+              .fromEntries(group.map((e) => .new(e.stateKey!, e.rowId))),
+            ),
+          ),
+    ),
+  );
+
+  static IMap<String, IList<ReadReceipt>> mergeReceipts(
+    IMap<String, IList<ReadReceipt>> existing,
+    IMap<String, IList<ReadReceipt>> incoming,
+  ) => incoming.isEmpty
+      ? existing
+      : existing.values.flattened
+            .followedBy(incoming.values.flattened)
+            .groupListsBy((receipt) => (receipt.userId, receipt.thread))
+            .values
+            .map(
+              (receipts) => receipts.reduce(
+                (newest, receipt) => newest.timestamp.isAfter(receipt.timestamp)
+                    ? newest
+                    : receipt,
+              ),
+            )
+            .groupListsBy((receipt) => receipt.eventId)
+            .map((eventId, receipts) => MapEntry(eventId, receipts.toIList()))
+            .toIMap();
+
+  /// Adds events to their rooms, without changing the rooms' timelines.
+  void storeEvents(Iterable<Event> events) => update(
+    .new(
+      events
+          .groupListsBy((event) => event.roomId)
+          .map(
+            (roomId, roomEvents) => .new(
+              roomId,
+              Room(
+                // ignore: unused_result - I am using it you donkey
+                events: .fromIterable(
+                  roomEvents,
+                  keyMapper: (event) => event.rowId,
+                ),
+              ),
+            ),
+          ),
+    ),
+  );
+
+  void update(
+    IMap<String, Room> rooms, [
+    ISet<String> leftRooms = const .empty(),
+  ]) {
     final merged = rooms.entries.fold(state, (acc, entry) {
       final roomId = entry.key;
       final incoming = entry.value;
@@ -46,13 +95,16 @@ class RoomsController extends Notifier<IMap<String, Room>> {
         roomId,
         existing?.copyWith(
               hasMore: incoming.hasMore,
-              sticky:
-                  (incoming.sticky.isEmpty == true
-                          ? existing.sticky
-                          : existing.sticky.addAll(incoming.sticky))
-                      .removeWhere(
-                        (rowId) => incoming.timeline.values.contains(rowId),
-                      ),
+              clientSticky: incoming.resetClientSticky
+                  ? incoming.clientSticky
+                  : (incoming.clientSticky.isEmpty
+                            ? existing.clientSticky
+                            : existing.clientSticky.addAll(
+                                incoming.clientSticky,
+                              ))
+                        .removeWhere(
+                          (rowId) => incoming.timeline.values.contains(rowId),
+                        ),
               metadata: incoming.metadata ?? existing.metadata,
               events: incoming.events.isEmpty
                   ? existing.events
@@ -64,32 +116,49 @@ class RoomsController extends Notifier<IMap<String, Room>> {
                   (previousValue[event.key] ?? .new()).addAll(event.value),
                 ),
               ),
+              resetClientSticky: false,
               reset: false,
               hasFetchedMembers:
                   incoming.hasFetchedMembers || existing.hasFetchedMembers,
               hasFetchedState:
                   incoming.hasFetchedState || existing.hasFetchedState,
-              timeline: (incoming.reset
+              timeline: incoming.reset
                   ? incoming.timeline
-                  : existing.timeline.addAll(incoming.timeline)),
-              receipts: incoming.receipts.entries.fold(
-                existing.receipts,
-                (receiptAcc, event) => receiptAcc.add(
-                  event.key,
-                  (receiptAcc[event.key] ?? .new()).addAll(event.value),
-                ),
-              ),
+                  : existing.timeline.addAll(incoming.timeline),
+              receipts: mergeReceipts(existing.receipts, incoming.receipts),
             ) ??
-            incoming,
+            incoming.copyWith(
+              receipts: mergeReceipts(const .empty(), incoming.receipts),
+            ),
       );
     });
 
-    final prunedList = leftRooms.fold(
-      merged,
-      (acc, roomId) => acc.remove(roomId),
-    );
+    state = leftRooms.fold(merged, (acc, roomId) => acc.remove(roomId));
+  }
 
-    state = prunedList;
+  /// Waits for a sent state event to become the room's state, which happens
+  /// once it comes down sync. Gives up after a while, e.g. if another event
+  /// replaced it first.
+  Future<void> awaitState(
+    String roomId,
+    String type,
+    String eventId, {
+    String stateKey = "",
+  }) {
+    bool arrived(IMap<String, Room> rooms) =>
+        switch (rooms[roomId]?.state[type]?[stateKey]) {
+          final rowId? => rooms[roomId]?.events[rowId]?.eventId == eventId,
+          null => false,
+        };
+    if (arrived(state)) return .value();
+
+    final completer = Completer<void>();
+    final removeListener = listenSelf((_, rooms) {
+      if (arrived(rooms) && !completer.isCompleted) completer.complete();
+    });
+    return completer.future
+        .timeout(const .new(seconds: 10), onTimeout: () {})
+        .whenComplete(removeListener);
   }
 
   static final provider = NotifierProvider<RoomsController, IMap<String, Room>>(

lib/controllers/selected_room.dart

@@ -0,0 +1,31 @@
+import "package:fast_immutable_collections/fast_immutable_collections.dart";
+import "package:flutter_riverpod/flutter_riverpod.dart";
+import "package:nexus/controllers/key.dart";
+import "package:nexus/controllers/selected_space.dart";
+import "package:nexus/helpers/extensions/get_all_child_rooms.dart";
+
+class SelectedRoomController extends Notifier<String?> {
+  @override
+  String? build() {
+    final roomId = ref.watch(
+      KeyController.provider(KeyController.roomKey)
+          .select((async) => async.value),
+    );
+
+    final roomIds = ref.watch(
+      SelectedSpaceController.provider.select(
+        (space) => space?.allChildRooms
+            .map((room) => room.metadata?.id)
+            .nonNulls
+            .toIList(),
+      ),
+    );
+    if (roomIds == null) return roomId;
+
+    return roomIds.contains(roomId) ? roomId : roomIds.firstOrNull;
+  }
+
+  static final provider = NotifierProvider<SelectedRoomController, String?>(
+    SelectedRoomController.new,
+  );
+}

lib/controllers/selected_space.dart

@@ -0,0 +1,25 @@
+import "package:collection/collection.dart";
+import "package:flutter_riverpod/flutter_riverpod.dart";
+import "package:nexus/controllers/key.dart";
+import "package:nexus/controllers/spaces.dart";
+import "package:nexus/models/space.dart";
+
+class SelectedSpaceController extends Notifier<Space?> {
+  @override
+  Space? build() {
+    final spaces = ref.watch(SpacesController.provider).value;
+    if (spaces == null) return null;
+
+    final spaceId = ref.watch(
+      KeyController.provider(KeyController.spaceKey)
+          .select((async) => async.value),
+    );
+
+    return spaces.firstWhereOrNull((space) => space.id == spaceId) ??
+        spaces.firstOrNull;
+  }
+
+  static final provider = NotifierProvider<SelectedSpaceController, Space?>(
+    SelectedSpaceController.new,
+  );
+}

lib/controllers/settings.dart

@@ -1,4 +1,5 @@
 import "dart:convert";
+
 import "package:flutter_riverpod/flutter_riverpod.dart";
 import "package:nexus/controllers/settings_file.dart";
 import "package:nexus/models/settings.dart";
@@ -17,7 +18,7 @@ class SettingsController extends AsyncNotifier<Settings> {
 
   Future<void> set(Settings settings) async {
     state = .data(settings);
-    final file = await ref.watch(SettingsFileController.provider.future);
+    final file = await ref.read(SettingsFileController.provider.future);
     await file.writeAsString(json.encode(settings.toJson()));
   }
 

lib/controllers/settings_file.dart

@@ -1,4 +1,5 @@
 import "dart:io";
+
 import "package:flutter_riverpod/flutter_riverpod.dart";
 import "package:path/path.dart";
 import "package:path_provider/path_provider.dart";

lib/controllers/settings_sections.dart

@@ -1,19 +1,34 @@
 import "dart:io";
 
 import "package:fast_immutable_collections/fast_immutable_collections.dart";
+import "package:flutter_hooks/flutter_hooks.dart";
+import "package:hooks_riverpod/hooks_riverpod.dart";
 import "package:material_ui/material_ui.dart";
-import "package:flutter_riverpod/flutter_riverpod.dart";
 import "package:intl/intl.dart";
 import "package:m3e_buttons/m3e_buttons.dart";
 import "package:nexus/controllers/account_data.dart";
 import "package:nexus/controllers/client.dart";
 import "package:nexus/controllers/client_state.dart";
+import "package:nexus/controllers/init_complete.dart";
+import "package:nexus/controllers/notification.dart";
 import "package:nexus/controllers/settings.dart";
+import "package:nexus/controllers/unified_push.dart";
 import "package:nexus/controllers/spec_versions.dart";
+import "package:nexus/controllers/unified_push_allowed.dart";
+import "package:nexus/controllers/unified_push_distributors.dart";
+import "package:nexus/helpers/extensions/distributor_name.dart";
 import "package:nexus/models/account_data.dart";
+import "package:nexus/models/client_state.dart";
+import "package:nexus/models/name_color.dart";
+import "package:nexus/models/room_order.dart";
+import "package:nexus/models/settings.dart";
 import "package:nexus/models/settings_category.dart";
+import "package:nexus/models/show_and_send.dart";
 import "package:nexus/main.dart";
 import "package:nexus/widgets/settings/dialog_list_tile.dart";
+import "package:nexus/widgets/user_bottom_sheet.dart";
+import "package:nexus/widgets/reset_encryption_sheet.dart";
+import "package:nexus/helpers/extensions/show_adaptive_sheet.dart";
 
 class SettingsSectionsController
     extends AsyncNotifier<IMap<String, IList<SettingsCategory>>> {
@@ -21,6 +36,30 @@ class SettingsSectionsController
   Future<IMap<String, IList<SettingsCategory>>> build() async {
     final settings = await ref.watch(SettingsController.provider.future);
 
+    /// A tile for a [ShowAndSend] setting, saving the settings from [update].
+    Widget showAndSendTile(
+      String title,
+      String description,
+      IconData icon, {
+      required ShowAndSend value,
+      required Settings Function(ShowAndSend value) update,
+    }) => DialogListTile<ShowAndSend>(
+      icon: Icon(icon),
+      title: title,
+      subtitle: Text(description),
+      value: value,
+      options: ShowAndSend.values,
+      getName: (option) => switch (option) {
+        .showAndSend => "Show and send",
+        .show => "Only show",
+        .neither => "Neither",
+      },
+      onChanged: (value) => ref
+          .read(SettingsController.provider.notifier)
+          .set(update(value))
+          .onError(showError),
+    );
+
     return .new({
       "General": .new([
         .new(
@@ -36,11 +75,11 @@ class SettingsSectionsController
                 icon: Icon(icon),
                 title: title,
                 subtitle: Text(description),
-                initialValue: settings.theme,
+                value: settings.theme,
                 options: ThemeMode.values,
                 getName: (option) => toBeginningOfSentenceCase(option.name),
                 onChanged: (value) => ref
-                    .watch(SettingsController.provider.notifier)
+                    .read(SettingsController.provider.notifier)
                     .set(settings.copyWith(theme: value))
                     .onError(showError),
               ),
@@ -60,21 +99,108 @@ class SettingsSectionsController
                         Platform.isMacOS ||
                         Platform.isWindows)
                     ? (value) => ref
-                          .watch(SettingsController.provider.notifier)
+                          .read(SettingsController.provider.notifier)
                           .set(settings.copyWith(useDynamicTheming: value))
                           .onError(showError)
                     : null,
               ),
             ),
+            .new(
+              title: "Name Colors",
+              description: "Color names by power level, so moderators and admins stand out, or by user, so everyone has their own.",
+              icon: Icons.format_color_text,
+              builder: (title, description, icon) => DialogListTile<NameColor>(
+                icon: Icon(icon),
+                title: title,
+                subtitle: Text(description),
+                value: settings.nameColor,
+                options: NameColor.values,
+                getName: (option) => switch (option) {
+                  .powerLevel => "By power level",
+                  .user => "By user",
+                },
+                onChanged: (value) => ref
+                    .read(SettingsController.provider.notifier)
+                    .set(settings.copyWith(nameColor: value))
+                    .onError(showError),
+              ),
+            ),
           ]),
         ),
         .new(
           title: "Behavior",
           icon: Icons.psychology,
           settings: .new([
+            .new(
+              title: "All Rooms In Home",
+              description: "Show all rooms in home, instead of just ones that aren't in spaces",
+              icon: Icons.home,
+              builder: (title, description, icon) => SwitchListTile(
+                title: Text(title),
+                subtitle: Text(description),
+                secondary: Icon(icon),
+                value: settings.showAllInHome,
+                onChanged: (value) => ref
+                    .read(SettingsController.provider.notifier)
+                    .set(settings.copyWith(showAllInHome: value))
+                    .onError(showError),
+              ),
+            ),
+            .new(
+              title: "Room Ordering",
+              description: "Sort rooms by recent activity, optionally showing mentioned and unread rooms first.",
+              icon: Icons.sort,
+              builder: (title, description, icon) => DialogListTile<RoomOrder>(
+                icon: Icon(icon),
+                title: title,
+                subtitle: Text(description),
+                value: settings.roomOrder,
+                options: RoomOrder.values,
+                getName: (option) => switch (option) {
+                  .unreadFirst => "Mentioned, then unread",
+                  .recentActivity => "Recent activity only",
+                },
+                onChanged: (value) => ref
+                    .read(SettingsController.provider.notifier)
+                    .set(settings.copyWith(roomOrder: value))
+                    .onError(showError),
+              ),
+            ),
+            .new(
+              title: "Swipe To Reply",
+              description: "Swipe a message to the right to reply to it.",
+              icon: Icons.swipe_right,
+              builder: (title, description, icon) => SwitchListTile(
+                title: Text(title),
+                subtitle: Text(description),
+                secondary: Icon(icon),
+                value: settings.swipeToReply,
+                onChanged: (value) => ref
+                    .read(SettingsController.provider.notifier)
+                    .set(settings.copyWith(swipeToReply: value))
+                    .onError(showError),
+              ),
+            ),
+            if (!Platform.isAndroid && !Platform.isIOS)
+              .new(
+                title: "Show Minimize Button",
+                description:
+                    "Enable this to add a minimize button to the appbar",
+                icon: Icons.minimize,
+                builder: (title, description, icon) => SwitchListTile(
+                  title: Text(title),
+                  subtitle: Text(description),
+                  secondary: Icon(icon),
+                  value: settings.showMinimizeButton,
+                  onChanged: (value) => ref
+                      .read(SettingsController.provider.notifier)
+                      .set(settings.copyWith(showMinimizeButton: value))
+                      .onError(showError),
+                ),
+              ),
             .new(
               title: "Linux Mobile Mode",
-              description: "Enables some fixes for Linux mobile, e.g. disabling dragging appbar for moving window.",
+              description: "Enables some fixes for Linux mobile, e.g. disabling dragging appbar for moving window, and swiping drawers open.",
               icon: Icons.construction,
               builder: (title, description, icon) => SwitchListTile(
                 title: Text(title),
@@ -83,18 +209,201 @@ class SettingsSectionsController
                 value: settings.linuxMobileMode,
                 onChanged: Platform.isLinux
                     ? (value) => ref
-                          .watch(SettingsController.provider.notifier)
+                          .read(SettingsController.provider.notifier)
                           .set(settings.copyWith(linuxMobileMode: value))
                           .onError(showError)
                     : null,
               ),
             ),
+            .new(
+              title: "Hide Membership Events",
+              description: "Hides membership events (invites, joins, leaves & bans) from appearing in conversations. Knocks are still shown.",
+              icon: Icons.person_off,
+              builder: (title, description, icon) => SwitchListTile(
+                title: Text(title),
+                subtitle: Text(description),
+                secondary: Icon(icon),
+                value: settings.hideMembershipEvents,
+                onChanged: (value) => ref
+                    .read(SettingsController.provider.notifier)
+                    .set(settings.copyWith(hideMembershipEvents: value))
+                    .onError(showError),
+              ),
+            ),
+            .new(
+              title: "Hide Server ACL Events",
+              description: "Hides server ACL (server ban list) changes from appearing in conversations.",
+              icon: Icons.dns,
+              builder: (title, description, icon) => SwitchListTile(
+                title: Text(title),
+                subtitle: Text(description),
+                secondary: Icon(icon),
+                value: settings.hideServerAclEvents,
+                onChanged: (value) => ref
+                    .read(SettingsController.provider.notifier)
+                    .set(settings.copyWith(hideServerAclEvents: value))
+                    .onError(showError),
+              ),
+            ),
+          ]),
+        ),
+        .new(
+          title: "Privacy",
+          icon: Icons.privacy_tip,
+          settings: .new([
+            .new(
+              title: "Typing Indicators",
+              description: "Show when others are typing, and let others see when you're typing.",
+              icon: Icons.keyboard,
+              builder: (title, description, icon) => showAndSendTile(
+                title,
+                description,
+                icon,
+                value: settings.typingIndicators,
+                update: (value) => settings.copyWith(typingIndicators: value),
+              ),
+            ),
+            .new(
+              title: "Read Receipts",
+              description: "Show how far others have read, and let others see what you've read. When not sent, read receipts are still sent privately, so your other devices know what you've read.",
+              icon: Icons.done_all,
+              builder: (title, description, icon) => showAndSendTile(
+                title,
+                description,
+                icon,
+                value: settings.readReceipts,
+                update: (value) => settings.copyWith(readReceipts: value),
+              ),
+            ),
           ]),
         ),
       ]),
-      if (ref.watch(ClientStateController.provider)?.isLoggedIn == true)
+      if (ref.watch(ClientStateController.provider) case ClientState(
+        isLoggedIn: true,
+        :final userId?,
+      ))
         "Account": .new([
-          .new(title: "Profile", icon: Icons.person, settings: .new([])),
+          .new(
+            title: "Profile",
+            icon: Icons.person,
+            settings: .new([
+              .new(
+                title: "Profile",
+                description: "Your avatar, display name, pronouns, and timezone, as others see them.",
+                icon: Icons.person,
+                builder: (title, description, icon) => Center(
+                  child: ConstrainedBox(
+                    constraints: .new(maxWidth: 500),
+                    child: UserBottomSheet(userId, editable: true),
+                  ),
+                ),
+              ),
+            ]),
+          ),
+          .new(
+            title: "Notifications",
+            icon: Icons.notifications,
+            settings: .new([
+              .new(
+                title: "Push notifications",
+                description: "Enable push notifications using Web Push, and choose which UnifiedPush distributor to use.",
+                builder: (title, description, icon) => HookConsumer(
+                  builder: (context, ref, _) {
+                    final loading = useState(false);
+                    final pusherRegistered = ref.watch(
+                      UnifiedPushController.provider,
+                    );
+                    final unifiedPushAllowed = ref.watch(
+                      UnifiedPushAllowedController.provider,
+                    );
+                    final distributors = ref.watch(
+                      UnifiedPushDistributorsController.provider,
+                    );
+                    final current = pusherRegistered.value;
+
+                    return DialogListTile<String?>(
+                      title: title,
+                      subtitle: Text(
+                        unifiedPushAllowed.maybeWhen(
+                              data: (data) => data,
+                              orElse: () => null,
+                            ) ??
+                            description,
+                      ),
+                      icon: Icon(icon),
+                      value: current,
+                      options: [
+                        null,
+                        ...?distributors.value,
+                        if (current != null &&
+                            distributors.value?.contains(current) != true)
+                          current,
+                      ],
+                      getName: (option) =>
+                          option == null ? "Off" : option.distributorName,
+                      onChanged: loading.value
+                          ? null
+                          : unifiedPushAllowed.maybeWhen(
+                              data: (data) => data == null,
+                              orElse: () => false,
+                            )
+                          ? pusherRegistered.maybeWhen(
+                              data: (_) => (value) async {
+                                if (value == current) return;
+                                try {
+                                  loading.value = true;
+                                  if (value != null) {
+                                    final messenger = ScaffoldMessenger.of(
+                                      context,
+                                    );
+                                    if (!await ref
+                                        .read(
+                                          NotificationController
+                                              .provider
+                                              .notifier,
+                                        )
+                                        .requestPermissions()) {
+                                      messenger.showSnackBar(
+                                        .new(
+                                          content: Text(
+                                            "Notifications are disabled. Enable them for Nexus in your system settings.",
+                                          ),
+                                        ),
+                                      );
+                                      return;
+                                    }
+                                    await ref
+                                        .read(
+                                          UnifiedPushController
+                                              .provider
+                                              .notifier,
+                                        )
+                                        .register(value);
+                                  } else {
+                                    await ref
+                                        .read(
+                                          UnifiedPushController
+                                              .provider
+                                              .notifier,
+                                        )
+                                        .deregister();
+                                  }
+                                } catch (error, stackTrace) {
+                                  showError(error, stackTrace);
+                                } finally {
+                                  loading.value = false;
+                                }
+                              },
+                              orElse: () => null,
+                            )
+                          : null,
+                    );
+                  },
+                ),
+                icon: Icons.notification_add,
+              ),
+            ]),
+          ),
           .new(
             title: "Safety",
             icon: Icons.gpp_good,
@@ -111,7 +420,7 @@ class SettingsSectionsController
                       icon: Icon(icon),
                       title: title,
                       subtitle: Text(description),
-                      initialValue: ref
+                      value: ref
                           .watch(AccountDataController.provider)
                           .invitePermissionConfig
                           .defaultAction,
@@ -132,7 +441,7 @@ class SettingsSectionsController
                       onChanged: specVersionsResponse.maybeWhen(
                         data: (_) =>
                             (value) => ref
-                                .watch(ClientController.provider.notifier)
+                                .read(ClientController.provider.notifier)
                                 .setAccountData(
                                   .new(
                                     type: AccountData.invitePermissionConfigKey,
@@ -155,6 +464,21 @@ class SettingsSectionsController
             title: "Other",
             icon: Icons.key,
             settings: .new([
+              .new(
+                title: "Reset Encryption Identity",
+                description: "Replace your encryption identity and recovery key with new ones, if you've lost your recovery key or your encryption is broken.",
+                builder: (title, description, icon) => Builder(
+                  builder: (context) => M3EButton.icon(
+                    onPressed: () => context.showAdaptiveSheet(
+                      (_) => const ResetEncryptionSheet(),
+                    ),
+                    label: Text(title),
+                    icon: Icon(icon),
+                    tooltip: description,
+                  ),
+                ),
+                icon: Icons.key_off,
+              ),
               .new(
                 title: "Log Out",
                 description:
@@ -164,14 +488,21 @@ class SettingsSectionsController
                     final colorScheme = Theme.of(context).colorScheme;
                     return M3EButton.icon(
                       onPressed: () async {
-                        Navigator.of(context)
-                            .popUntil((route) => route.isFirst);
+                        final container = ProviderScope.containerOf(context);
 
-                        await WidgetsBinding.instance.endOfFrame;
+                        final route = ModalRoute.of(context)!;
+                        Navigator.of(context).popUntil((r) => r.isFirst);
+                        await route.completed;
 
-                        await ref
-                            .watch(ClientController.provider.notifier)
-                            .logout();
+                        await container
+                            .read(UnifiedPushController.provider.notifier)
+                            .deregister()
+                            .onError(showError);
+                        container.invalidate(InitCompleteController.provider);
+                        await container
+                            .read(ClientController.provider.notifier)
+                            .logout()
+                            .onError(showError);
                       },
                       label: Text(title),
                       icon: Icon(icon),

lib/controllers/shared_prefs.dart

@@ -1,12 +1,12 @@
 import "package:flutter_riverpod/flutter_riverpod.dart";
 import "package:shared_preferences/shared_preferences.dart";
 
-class SharedPrefsController extends AsyncNotifier<SharedPreferences> {
+class SharedPrefsController extends Notifier<SharedPreferencesAsync> {
   @override
-  Future<SharedPreferences> build() async => .getInstance();
+  SharedPreferencesAsync build() => SharedPreferencesAsync();
 
   static final provider =
-      AsyncNotifierProvider<SharedPrefsController, SharedPreferences>(
+      NotifierProvider<SharedPrefsController, SharedPreferencesAsync>(
         SharedPrefsController.new,
       );
 }

lib/controllers/sidebar_page.dart

@@ -0,0 +1,13 @@
+import "package:flutter_riverpod/flutter_riverpod.dart";
+import "package:nexus/models/sidebar_page.dart";
+
+class SidebarPageController extends Notifier<SidebarPage> {
+  @override
+  SidebarPage build() => .rooms;
+
+  void set(SidebarPage page) => state = page;
+
+  static final provider = NotifierProvider<SidebarPageController, SidebarPage>(
+    SidebarPageController.new,
+  );
+}

lib/controllers/space_hierarchy.dart

@@ -0,0 +1,34 @@
+import "package:hooks_riverpod/hooks_riverpod.dart";
+import "package:nexus/controllers/client.dart";
+import "package:nexus/models/space_hierarchy.dart";
+
+class SpaceHierarchyController(final String spaceId)
+    extends AsyncNotifier<SpaceHierarchy> {
+  @override
+  Future<SpaceHierarchy> build() => ref
+      .read(ClientController.provider.notifier)
+      .getSpaceHierarchy(.new(roomId: spaceId, maxDepth: 1));
+
+  Future<void> loadMore() async {
+    final current = await future;
+    if (current.nextBatch == null) return;
+
+    final next = await ref
+        .read(ClientController.provider.notifier)
+        .getSpaceHierarchy(
+          .new(roomId: spaceId, maxDepth: 1, from: current.nextBatch),
+        );
+
+    state = AsyncData(
+      current.copyWith(
+        rooms: current.rooms.addAll(next.rooms),
+        nextBatch: next.nextBatch,
+      ),
+    );
+  }
+
+  static final provider = AsyncNotifierProvider.family
+      .autoDispose<SpaceHierarchyController, SpaceHierarchy, String>(
+        SpaceHierarchyController.new,
+      );
+}

lib/controllers/spaces.dart

@@ -4,87 +4,90 @@ import "package:material_ui/material_ui.dart";
 import "package:flutter_riverpod/flutter_riverpod.dart";
 import "package:nexus/controllers/account_data.dart";
 import "package:nexus/controllers/rooms.dart";
+import "package:nexus/controllers/settings.dart";
 import "package:nexus/controllers/top_level_spaces.dart";
 import "package:nexus/controllers/space_edges.dart";
 import "package:nexus/models/room.dart";
+import "package:nexus/models/room_metadata.dart";
 import "package:nexus/models/space.dart";
 import "package:nexus/models/subspace.dart";
 
-class SpacesController extends Notifier<IList<Space>> {
+class SpacesController extends AsyncNotifier<IList<Space>> {
   @override
-  IList<Space> build() {
+  Future<IList<Space>> build() async {
     final rooms = ref.watch(RoomsController.provider);
     final topLevelSpaceIds = ref.watch(TopLevelSpacesController.provider);
     final spaceEdges = ref.watch(SpaceEdgesController.provider);
     final accountData = ref.watch(AccountDataController.provider);
 
-    final childrenById = {
-      for (final entry in spaceEdges.entries)
-        entry.key: entry.value.map((e) => e.childId).toList(),
-    };
+    final childrenById = spaceEdges.map(
+      (spaceId, edges) =>
+          MapEntry(spaceId, edges.map((edge) => edge.childId).toList()),
+    );
 
-    Set<String> collectDescendants(String startId) {
-      final visited = <String>{};
-      final stack = [startId];
-
-      while (stack.isNotEmpty) {
-        final current = stack.removeLast();
-        final children = childrenById[current] ?? const [];
-
-        for (final child in children) {
-          if (visited.add(child)) {
-            stack.add(child);
-          }
-        }
-      }
-
-      return visited;
-    }
+    /// Everything under [spaceId], however deep, skipping any already
+    /// [visited] so cycles end.
+    ISet<String> collectDescendants(
+      String spaceId, [
+      ISet<String> visited = const .empty(),
+    ]) => (childrenById[spaceId] ?? const []).fold(
+      visited,
+      (visited, childId) => visited.contains(childId)
+          ? visited
+          : collectDescendants(childId, visited.add(childId)),
+    );
 
     Space buildSpace(String spaceId) {
       final space = rooms[spaceId];
       final directChildrenIds = childrenById[spaceId] ?? const [];
 
-      final directRooms = <Room>[];
-      final subSpaces = <Subspace>[];
-
-      for (final childId in directChildrenIds) {
-        final room = rooms[childId];
-        if (room == null) continue;
-
-        if (childrenById.containsKey(childId)) {
-          final descendants = collectDescendants(childId);
-
-          subSpaces.add(
-            .new(
-              room: room,
-              children: .new(descendants.map((id) => rooms[id]).nonNulls),
-            ),
-          );
-        } else {
-          directRooms.add(room);
-        }
-      }
-
       return .new(
         id: spaceId,
         room: space,
         title: space?.metadata?.name ?? "Unnamed Space",
-        children: .new(directRooms),
-        subSpaces: .new(subSpaces),
+        children: .new(
+          directChildrenIds
+              .where((childId) => !childrenById.containsKey(childId))
+              .map((childId) => rooms[childId])
+              .nonNulls,
+        ),
+        subSpaces: .new(
+          directChildrenIds
+              .where(childrenById.containsKey)
+              .map(
+                (childId) => switch (rooms[childId]) {
+                  final room? => Subspace(
+                    room: room,
+                    children: .new(
+                      collectDescendants(childId)
+                          .map((id) => rooms[id])
+                          .nonNulls,
+                    ),
+                  ),
+                  null => null,
+                },
+              )
+              .nonNulls,
+        ),
       );
     }
 
-    final spaces = topLevelSpaceIds.map(buildSpace).toIList();
+    final spaces = topLevelSpaceIds
+        .where(rooms.containsKey)
+        .map(buildSpace)
+        .toIList();
 
-    final usedRoomIds = {
-      for (final space in spaces) ...[
-        ...space.children.map((r) => r.metadata?.id),
-        ...space.subSpaces.expand((s) => s.children.map((r) => r.metadata?.id)),
-      ],
-    }.nonNulls.toISet();
+    final usedRooms = spaces
+        .expand(
+          (space) => [
+            ...space.children,
+            ...space.subSpaces.expand((s) => s.children),
+          ],
+        )
+        .toISet();
+    final usedRoomIds = usedRooms.map((room) => room.metadata?.id).toSet();
 
-    final directMessages = accountData.directMessages.values.flattened;
+    final directMessages = accountData.directMessages.values.flattened.toSet();
 
     final otherRooms = rooms.entries
         .where(
@@ -97,6 +100,15 @@ class SpacesController extends Notifier<IList<Space>> {
         .toIList();
 
     final homeRooms = otherRooms
+        .addAll(
+          await ref.watch(
+                SettingsController.provider.selectAsync(
+                  (data) => data.showAllInHome,
+                ),
+              )
+              ? usedRooms
+              : .empty(),
+        )
         .where((r) => !directMessages.contains(r.metadata?.id))
         .toIList();
 
@@ -122,28 +134,38 @@ class SpacesController extends Notifier<IList<Space>> {
       ...spaces,
     ];
 
+    final roomOrder = await ref.watch(
+      SettingsController.provider.selectAsync((data) => data.roomOrder),
+    );
+
+    // Mentioned -> Unread -> Other
+    int unreadPriority(Room room) => switch (room.metadata) {
+      RoomMetadata(unreadHighlights: > 0) => 0,
+      RoomMetadata(unreadNotifications: > 0) ||
+      RoomMetadata(unreadMessages: > 0) => 1,
+      _ => 2,
+    };
+
     return allSpaces
         .map(
           (space) => space.copyWith(
-            children: .new(
-              space.children
-                  .sortedBy(
-                    (element) =>
-                        element
-                            .metadata
-                            ?.sortingTimestamp
-                            .millisecondsSinceEpoch ??
-                        0,
-                  )
-                  .sortedBy((room) => room.metadata?.unreadMessages ?? 0)
-                  .reversed,
-            ),
+            children: space.children.sort((a, b) {
+              if (roomOrder == .unreadFirst) {
+                final byUnread = unreadPriority(a).compareTo(unreadPriority(b));
+                if (byUnread != 0) return byUnread;
+              }
+
+              // Most recent activity first
+              return (b.metadata?.sortingTimestamp ?? DateTime(0)).compareTo(
+                a.metadata?.sortingTimestamp ?? DateTime(0),
+              );
+            }),
           ),
         )
         .toIList();
   }
 
-  static final provider = NotifierProvider<SpacesController, IList<Space>>(
+  static final provider = AsyncNotifierProvider<SpacesController, IList<Space>>(
     SpacesController.new,
   );
 }

lib/controllers/spec_versions.dart

@@ -5,7 +5,7 @@ import "package:nexus/models/spec_versions_response.dart";
 class SpecVersionsController extends AsyncNotifier<SpecVersionsResponse> {
   @override
   Future<SpecVersionsResponse> build() =>
-      ref.watch(ClientController.provider.notifier).getSpecVersions();
+      ref.read(ClientController.provider.notifier).getSpecVersions();
 
   static final provider =
       AsyncNotifierProvider.autoDispose<

lib/controllers/timezones.dart

@@ -0,0 +1,17 @@
+import "package:fast_immutable_collections/fast_immutable_collections.dart";
+import "package:flutter_riverpod/flutter_riverpod.dart";
+import "package:timezone/data/latest_10y.dart";
+import "package:timezone/timezone.dart";
+
+/// The names of all IANA timezones, e.g. `Europe/London`, alphabetically.
+class TimezonesController extends Notifier<IList<String>> {
+  @override
+  IList<String> build() {
+    initializeTimeZones();
+    return timeZoneDatabase.locations.keys.toIList().sort();
+  }
+
+  static final provider = NotifierProvider<TimezonesController, IList<String>>(
+    TimezonesController.new,
+  );
+}

lib/controllers/typing.dart

@@ -0,0 +1,15 @@
+import "package:fast_immutable_collections/fast_immutable_collections.dart";
+import "package:flutter_riverpod/flutter_riverpod.dart";
+import "package:nexus/models/typing.dart";
+
+class TypingController extends Notifier<IMap<String, IList<String>>> {
+  @override
+  IMap<String, IList<String>> build() => .new();
+
+  void set(Typing typing) => state = state.add(typing.roomId, typing.userIds);
+
+  static final provider =
+      NotifierProvider<TypingController, IMap<String, IList<String>>>(
+        TypingController.new,
+      );
+}

lib/controllers/unified_push.dart

@@ -0,0 +1,260 @@
+import "dart:async";
+import "dart:convert";
+import "dart:io";
+
+import "package:flutter/foundation.dart";
+import "package:flutter_riverpod/flutter_riverpod.dart";
+import "package:intl/intl.dart";
+import "package:nexus/controllers/selected_room.dart";
+import "package:nexus/controllers/notification.dart";
+import "package:nexus/controllers/push_key.dart";
+import "package:nexus/main.dart";
+import "package:nexus/controllers/client.dart";
+import "package:nexus/controllers/gomuks_listener.dart";
+import "package:unifiedpush/unifiedpush.dart";
+import "package:unifiedpush_storage_shared_preferences/storage.dart";
+import "package:window_manager/window_manager.dart";
+
+class UnifiedPushController extends AsyncNotifier<String?> {
+  Completer<void>? _endpoint;
+
+  @override
+  Future<String?> build() async {
+    if (!Platform.isLinux && !Platform.isAndroid) return null;
+
+    final registered = await UnifiedPush.initialize(
+      linuxOptions: .new(
+        dbusName: "nexus.federated.nexus.UnifiedPush",
+        storage: UnifiedPushStorageSharedPreferences(),
+        background: isInBackground,
+        shouldWriteService: false,
+      ),
+      onNewEndpoint: (endpoint, instance) async {
+        final task = Future(() async {
+          final pushKey = endpoint.pubKeySet!.pubKey;
+          await ref
+              .read(PushKeyController.provider(instance).notifier)
+              .set(pushKey);
+
+          await ref
+              .read(ClientController.provider.notifier)
+              .registerPusher(
+                .new(
+                  appDisplayName: "Nexus",
+                  appId: "nexus.federated.nexus",
+                  data: .webPush(
+                    url: .parse(endpoint.url),
+                    auth: endpoint.pubKeySet!.auth,
+                  ),
+                  deviceDisplayName:
+                      "Nexus on ${toBeginningOfSentenceCase(Platform.operatingSystem)}",
+                  kind: .webPush,
+                  lang: "en",
+                  pushKey: pushKey,
+                ),
+              );
+
+          state = .data(await UnifiedPush.getDistributor());
+        });
+
+        if (_endpoint case final completer? when !completer.isCompleted) {
+          completer.complete(task);
+        } else {
+          await task;
+        }
+      },
+      onRegistrationFailed: (reason, instance) {
+        if (_endpoint case final completer? when !completer.isCompleted) {
+          completer.completeError(reason);
+        } else {
+          throw reason;
+        }
+      },
+      onMessage: (message, instance) async {
+        debugPrint("UP message received for $instance");
+        if (await deregisterIfDisabled(instance)) {
+          if (isInBackground) exit(0);
+          return;
+        }
+
+        if (message.decrypted == false) {
+          throw Exception(
+            "Failed to decrypt notification. Try toggling off and on UnifiedPush in settings.",
+          );
+        }
+        final notification = await ref
+            .read(ClientController.provider.notifier)
+            .handlePush(json.decode(String.fromCharCodes(message.content)));
+
+        if (notification == null ||
+            (!isInBackground &&
+                (!Platform.isAndroid &&
+                    (WindowManager.instance.getCurrent()?.isFocused ?? true)) &&
+                ref.read(SelectedRoomController.provider) ==
+                    notification.roomId)) {
+          if (isInBackground) exit(0);
+          return;
+        }
+
+        final client = ref.read(ClientController.provider.notifier);
+
+        final icon = notification.roomAvatar == null
+            ? null
+            : await client.downloadMedia(
+                .new(mxc: notification.roomAvatar!, isAvatar: true),
+              );
+
+        final pmp = notification.perMessageProfile;
+        final senderAvatarUrl = pmp?.avatar ?? notification.sender.avatar;
+        // Only Android can show the sender's avatar
+        final senderAvatar = senderAvatarUrl == null || !Platform.isAndroid
+            ? null
+            : await client.downloadMedia(
+                .new(mxc: senderAvatarUrl, isAvatar: true),
+              );
+
+        await ref
+            .read(NotificationController.provider.notifier)
+            .send(
+              // Android stacks messages into one conversation per room
+              id:
+                  (Platform.isAndroid
+                          ? notification.roomId
+                          : notification.eventId)
+                      .hashCode &
+                  0x7fffffff,
+              threadId: notification.roomId,
+              title: notification.roomName,
+              body: notification.text,
+              payload: notification.eventRowId.toString(),
+              timestamp: notification.timestamp,
+              icon: icon,
+              sound: notification.sound,
+              message: (
+                sender: pmp == null
+                    ? notification.sender
+                    : pmp.copyWith(id: "${notification.sender.id}/${pmp.id}"),
+                self: notification.self,
+                senderAvatar: senderAvatar,
+                isDm: notification.isDm,
+              ),
+            );
+
+        if (isInBackground) exit(0);
+      },
+      onUnregistered: deregister,
+    );
+
+    if (!registered || isInBackground) return null;
+
+    try {
+      if (await deregisterIfDisabled()) return null;
+
+      return await register();
+    } catch (error, stackTrace) {
+      showError(error, stackTrace);
+      return null;
+    }
+  }
+
+  /// Registers with [distributor], or the current/default distributor if none
+  /// is given. Returns the distributor that was registered with.
+  Future<String?> register([String? distributor]) async {
+    if (distributor != null &&
+        state.value != null &&
+        state.value != distributor) {
+      await deregister();
+    }
+
+    state = .loading();
+    try {
+      final deviceId = await ref
+          .read(GomuksListenerController.provider.notifier)
+          .deviceId();
+
+      await Future(() async {
+        final capabilities = await ref
+            .read(ClientController.provider.notifier)
+            .getCapabilities();
+
+        if (capabilities.webpush?.vapid == null) {
+          throw UnsupportedError(
+            "Your homeserver does not support MSC4174 (Web Push), and therefore cannot send notifications to Nexus.",
+          );
+        }
+
+        if (distributor != null) {
+          await UnifiedPush.saveDistributor(distributor);
+        } else if (!await UnifiedPush.tryUseCurrentOrDefaultDistributor()) {
+          throw Exception("No UnifiedPush distributors found.");
+        }
+
+        final endpoint = _endpoint = Completer<void>();
+
+        try {
+          await Future.wait([
+            UnifiedPush.register(
+              instance: deviceId,
+              vapid: capabilities.webpush?.vapid,
+            ),
+            endpoint.future,
+          ], eagerError: true);
+        } finally {
+          if (_endpoint == endpoint) _endpoint = null;
+        }
+      }).timeout(
+        .new(seconds: 10),
+        onTimeout: () => throw Exception("UnifiedPush registration timed out."),
+      );
+
+      final current = await UnifiedPush.getDistributor();
+      state = .data(current);
+      return current;
+    } catch (_) {
+      state = .data(null);
+      rethrow;
+    }
+  }
+
+  Future<bool> deregisterIfDisabled([String? notificationInstance]) async {
+    if (await ref
+        .read(NotificationController.provider.notifier)
+        .permissionsGranted()) {
+      return false;
+    }
+
+    final instance =
+        notificationInstance ??
+        await ref.read(GomuksListenerController.provider.notifier).deviceId();
+    final key = await ref.read(PushKeyController.provider(instance).future);
+    if (key != null) await deregister(instance);
+    return true;
+  }
+
+  Future<void> deregister([String? instance]) async {
+    instance ??= await ref
+        .read(GomuksListenerController.provider.notifier)
+        .deviceId();
+
+    final keyProvider = PushKeyController.provider(instance);
+    final key = await ref.read(keyProvider.future);
+
+    if (key != null) {
+      await ref
+          .read(ClientController.provider.notifier)
+          .deregisterPusher(.new(appId: "nexus.federated.nexus", pushKey: key));
+      await ref.read(keyProvider.notifier).set(null);
+    } else {
+      debugPrint(
+        "No matching pushKey found. Skipping deregistration from homeserver.",
+      );
+    }
+
+    await UnifiedPush.unregister(instance);
+    state = .data(null);
+  }
+
+  static final provider = AsyncNotifierProvider<UnifiedPushController, String?>(
+    UnifiedPushController.new,
+  );
+}

lib/controllers/unified_push_allowed.dart

@@ -0,0 +1,37 @@
+import "dart:io";
+
+import "package:flutter_riverpod/flutter_riverpod.dart";
+import "package:nexus/controllers/client.dart";
+import "package:nexus/controllers/unified_push_distributors.dart";
+
+class UnifiedPushAllowedController extends AsyncNotifier<String?> {
+  @override
+  Future<String?> build() async {
+    final distributors = await ref.watch(
+      UnifiedPushDistributorsController.provider.future,
+    );
+
+    if (distributors.isEmpty) {
+      return "No valid distributors found. ${Platform.isLinux
+          ? "Try installing KUnifiedPush"
+          : Platform.isAndroid
+          ? "Try installing Google Play Services or NTFY"
+          : "Your platform is not currently supported by UnifiedPush"}.";
+    }
+
+    final capabilities = await ref
+        .read(ClientController.provider.notifier)
+        .getCapabilities();
+
+    if (capabilities.webpush?.vapid == null) {
+      return "Your homeserver does not support MSC4174 (Web Push), and therefore cannot send notifications to Nexus.";
+    }
+
+    return null;
+  }
+
+  static final provider =
+      AsyncNotifierProvider.autoDispose<UnifiedPushAllowedController, String?>(
+        UnifiedPushAllowedController.new,
+      );
+}

lib/controllers/unified_push_distributors.dart

@@ -0,0 +1,26 @@
+import "dart:io";
+
+import "package:fast_immutable_collections/fast_immutable_collections.dart";
+import "package:flutter_riverpod/flutter_riverpod.dart";
+import "package:unifiedpush/unifiedpush.dart";
+
+class UnifiedPushDistributorsController extends AsyncNotifier<IList<String>> {
+  @override
+  Future<IList<String>> build() async {
+    if (!Platform.isLinux && !Platform.isAndroid) return .new();
+
+    return IList(
+      await UnifiedPush.getDistributors().timeout(
+        .new(seconds: 10),
+        onTimeout: () =>
+            throw Exception("UnifiedPush distributor check timed out."),
+      ),
+    );
+  }
+
+  static final provider =
+      AsyncNotifierProvider.autoDispose<
+        UnifiedPushDistributorsController,
+        IList<String>
+      >(UnifiedPushDistributorsController.new);
+}

lib/controllers/url_preview.dart

@@ -11,7 +11,7 @@ class UrlPreviewController(final Uri url)
 
     try {
       return await ref
-          .watch(ClientController.provider.notifier)
+          .read(ClientController.provider.notifier)
           .getUrlPreview(url);
     } catch (error, stackTrace) {
       debugPrintStack(label: error.toString(), stackTrace: stackTrace);

lib/controllers/user.dart

@@ -1,4 +1,5 @@
 import "dart:async";
+
 import "package:collection/collection.dart";
 import "package:flutter_riverpod/flutter_riverpod.dart";
 import "package:nexus/controllers/members.dart";

lib/controllers/via.dart

@@ -1,53 +1,48 @@
-import "package:collection/collection.dart";
 import "package:fast_immutable_collections/fast_immutable_collections.dart";
 import "package:flutter_riverpod/flutter_riverpod.dart";
 import "package:nexus/controllers/client_state.dart";
 import "package:nexus/models/content/content.dart";
 import "package:nexus/models/content/membership.dart";
 import "package:nexus/models/content/power_levels.dart";
+import "package:nexus/models/event.dart";
 import "package:nexus/models/room.dart";
 
 class ViaController(final Room room) extends Notifier<String> {
   @override
   String build() {
-    final servers = <String>{};
+    final powerLevelUsers =
+        switch (room.state[EventType.powerLevels.type]?[""]) {
+          final rowId? => switch (room.events[rowId]?.content) {
+            PowerLevelsContent(:final users) => users.keys.toIList(),
+            _ => null,
+          },
+          null => null,
+        } ??
+        .new([]);
 
-    void addUserId(String? userId) {
-      final server = userId?.split(":").lastOrNull;
-      if (server != null) {
-        servers.add(server);
-      }
-    }
+    final joinedMembers =
+        (room.state[EventType.membership.type]?.values ?? const [])
+            .map(
+              (rowId) => switch (room.events[rowId]) {
+                Event(
+                  stateKey: final userId?,
+                  content: MembershipContent(status: .join),
+                ) =>
+                  userId,
+                _ => null,
+              },
+            )
+            .nonNulls
+            .toIList();
 
-    addUserId(ref.watch(ClientStateController.provider)?.userId);
-
-    final powerLevelsEventId = room.state[EventType.powerLevels.type]?[""];
-    final powerLevels = powerLevelsEventId == null
-        ? null
-        : room.events[powerLevelsEventId];
-
-    if (powerLevels?.content case PowerLevelsContent(:final users)) {
-      for (final userId in users.keys) {
-        addUserId(userId);
-        if (servers.length >= 5) break;
-      }
-    }
-
-    final members = room.state[EventType.membership.type]?.values.toIList();
-    for (var i = 0; servers.length < 5; i++) {
-      final membershipEventId = members?.getOrNull(i);
-      final member = membershipEventId == null
-          ? null
-          : room.events[membershipEventId];
-
-      if (member?.content case MembershipContent(:final status)) {
-        if (status == .join) {
-          addUserId(member?.stateKey);
-        }
-      }
-
-      if (members?.getOrNull(i) == null) break;
-    }
+    final servers = [?ref.watch(ClientStateController.provider)?.userId]
+        .toIList()
+        .addAll(powerLevelUsers)
+        .addAll(joinedMembers)
+        .map((userId) => userId.substring(userId.indexOf(":") + 1))
+        .whereNoDuplicates()
+        .take(5)
+        .toISet();
 
     return servers.isEmpty
         ? ""

lib/helpers/extensions/better_when.dart

@@ -8,10 +8,12 @@ extension BetterWhen<T> on AsyncValue<T> {
     required Widget Function(T value) data,
     Widget Function() loading = Loading.new,
     bool skipLoadingOnRefresh = false,
+    bool skipLoadingOnReload = false,
   }) => when(
     data: data,
     error: (error, stackTrace) => ErrorDialog(error, stackTrace),
     loading: loading,
     skipLoadingOnRefresh: skipLoadingOnRefresh,
+    skipLoadingOnReload: skipLoadingOnReload,
   );
 }

lib/helpers/extensions/build_event_options.dart

@@ -0,0 +1,295 @@
+import "package:fast_immutable_collections/fast_immutable_collections.dart";
+import "package:material_ui/material_ui.dart";
+import "package:nexus/widgets/sheet_layout.dart";
+import "package:flutter/services.dart";
+import "package:flutter_hooks/flutter_hooks.dart";
+import "package:hooks_riverpod/hooks_riverpod.dart";
+import "package:nexus/controllers/client.dart";
+import "package:nexus/controllers/pinned_ids.dart";
+import "package:nexus/controllers/power_level.dart";
+import "package:nexus/controllers/recent_emoji.dart";
+import "package:nexus/controllers/rooms.dart";
+import "package:nexus/controllers/room_chat.dart";
+import "package:nexus/controllers/via.dart";
+import "package:nexus/helpers/extensions/event_id_is_fake.dart";
+import "package:nexus/helpers/extensions/is_desktop.dart";
+import "package:nexus/helpers/extensions/show_adaptive_sheet.dart";
+import "package:nexus/models/content/message.dart";
+import "package:nexus/models/event.dart";
+import "package:nexus/models/relation_type.dart";
+import "package:nexus/widgets/emoji_picker.dart";
+import "package:nexus/widgets/mxc_emoji.dart";
+import "package:nexus/main.dart";
+
+extension BuildEventOptions on Event {
+  IList<PopupMenuEntry> buildEventOptions({
+    required BuildContext context,
+    required WidgetRef ref,
+    required String roomId,
+    required String userId,
+    required void Function(int, RelationType) onRelation,
+  }) {
+    final theme = Theme.of(context);
+    final danger = theme.colorScheme.error;
+    final isDesktop = context.isDesktop;
+
+    final notifier = RoomChatController.provider((
+      roomId: roomId,
+      contextualEvent: null,
+    )).notifier;
+
+    final isPinned = ref
+        .read(PinnedIdsController.provider(roomId))
+        .contains(eventId);
+
+    void showReasonSheet({
+      required String title,
+      required String description,
+      required String action,
+      required Future<void> Function(String reason) onConfirm,
+    }) {
+      context.showAdaptiveSheet(
+        (context) => HookBuilder(
+          builder: (context) {
+            final reasonController = useTextEditingController();
+
+            return SheetLayout(
+              title: Text(title),
+              actions: [
+                TextButton(
+                  onPressed: Navigator.of(context).pop,
+                  child: const Text("Cancel"),
+                ),
+                TextButton(
+                  onPressed: () {
+                    final reason = reasonController.text;
+                    Navigator.of(context).pop();
+
+                    onConfirm(reason).onError(showError);
+                  },
+                  child: Text(action),
+                ),
+              ],
+              children: [
+                Text(description),
+                TextField(
+                  controller: reasonController,
+                  textCapitalization: .sentences,
+                  decoration: .new(labelText: "Reason (optional)"),
+                ),
+              ],
+            );
+          },
+        ),
+      );
+    }
+
+    return .new([
+      if (ref.read(
+        PowerLevelController.provider(
+          .new(eventType: .reaction, roomId: roomId),
+        ),
+      ))
+        PopupMenuItem(
+          enabled: false,
+          child: IconTheme(
+            data: theme.iconTheme,
+            child: Row(
+              mainAxisAlignment: isDesktop ? .center : .spaceEvenly,
+              children: [
+                ...{
+                      // Custom emoji are sent without their shortcode, as only
+                      // their mxc URL is recorded
+                      ...ref
+                          .read(RecentEmojiController.provider)
+                          .map((entry) => entry.emoji),
+                      "👍",
+                      "🤣",
+                      "😭",
+                      "🤔",
+                      "❤️",
+                    }
+                    .take(isDesktop ? 3 : 5)
+                    .map(
+                      (emoji) => IconButton(
+                        icon: emoji.startsWith("mxc://")
+                            ? SizedBox.square(
+                                dimension: isDesktop ? 18 : 24,
+                                child: MxcEmoji(Uri.parse(emoji)),
+                              )
+                            : Text(
+                                emoji,
+                                style: .new(fontSize: isDesktop ? null : 18),
+                              ),
+                        onPressed: () async {
+                          Navigator.of(context).pop();
+                          await ref
+                              .read(notifier)
+                              .sendReaction(emoji, this)
+                              .onError(showError);
+
+                          await ref
+                              .read(RecentEmojiController.provider.notifier)
+                              .add(emoji)
+                              .onError(showError);
+                        },
+                      ),
+                    ),
+                IconButton(
+                  icon: const Icon(Icons.emoji_emotions),
+                  onPressed: () {
+                    Navigator.of(context).pop();
+
+                    context.showAdaptiveSheet(
+                      (context) => EmojiPicker(
+                        roomId: roomId,
+                        allowFreeText: true,
+                        onSelection: (emoji, {shortcode}) {
+                          Navigator.of(context).pop();
+                          ref
+                              .read(notifier)
+                              .sendReaction(emoji, this, shortcode: shortcode)
+                              .onError(showError);
+                        },
+                      ),
+                    );
+                  },
+                ),
+              ],
+            ),
+          ),
+        ),
+
+      if (ref.read(
+        PowerLevelController.provider(
+          .new(eventType: .message, roomId: roomId),
+        ),
+      ))
+        PopupMenuItem(
+          onTap: () => onRelation(rowId, .reply),
+          child: const ListTile(
+            leading: Icon(Icons.reply),
+            title: Text("Reply"),
+          ),
+        ),
+
+      if (content is MessageContent && sender == userId)
+        PopupMenuItem(
+          onTap: () => onRelation(rowId, .edit),
+          child: const ListTile(leading: Icon(Icons.edit), title: Text("Edit")),
+        ),
+
+      if (ref.read(
+        PowerLevelController.provider(
+          .state(eventType: .pinnedEvents, roomId: roomId),
+        ),
+      ))
+        PopupMenuItem(
+          onTap: () async {
+            try {
+              final pins = ref.read(
+                PinnedIdsController.provider(roomId).notifier,
+              );
+
+              if (isPinned) {
+                await pins.removePin(eventId);
+              } else {
+                await pins.addPin(eventId);
+              }
+            } catch (error, stackTrace) {
+              showError(error, stackTrace);
+            }
+          },
+          child: ListTile(
+            leading: const Icon(Icons.push_pin),
+            title: Text(isPinned ? "Unpin Event" : "Pin Event"),
+          ),
+        ),
+
+      PopupMenuItem(
+        onTap: () async {
+          final room = ref.read(
+            RoomsController.provider.select((rooms) => rooms[roomId]),
+          );
+          if (room == null) return;
+
+          final vias = ref.read(ViaController.provider(room));
+
+          await Clipboard.setData(
+            ClipboardData(
+              text:
+                  "matrix:roomid/${room.metadata?.id.substring(1)}/e/${eventId.substring(1)}$vias",
+            ),
+          );
+        },
+        child: const ListTile(
+          leading: Icon(Icons.link),
+          title: Text("Copy Link"),
+        ),
+      ),
+
+      if (content case MessageContent(:final body?))
+        PopupMenuItem(
+          onTap: () => Clipboard.setData(ClipboardData(text: body)),
+          child: const ListTile(
+            leading: Icon(Icons.copy),
+            title: Text("Copy Text"),
+          ),
+        ),
+
+      if (ref.read(
+            PowerLevelController.provider(
+              .redaction(targetUser: sender, roomId: roomId),
+            ),
+          ) &&
+          !eventId.isFake)
+        PopupMenuItem(
+          onTap: () => showReasonSheet(
+            title: "Delete Message",
+            description:
+                "Are you sure you want to delete this message? "
+                "This cannot be reversed.",
+            action: "Delete",
+            onConfirm: (reason) =>
+                ref.read(notifier).deleteMessage(this, reason: reason),
+          ),
+          child: ListTile(
+            leading: Icon(Icons.delete, color: danger),
+            title: Text("Delete", style: .new(color: danger)),
+          ),
+        ),
+
+      if (eventId.isFake)
+        PopupMenuItem(
+          onTap: () => ref.read(notifier).hideClientSticky(rowId),
+          child: ListTile(
+            leading: Icon(Icons.delete, color: danger),
+            title: Text("Hide", style: .new(color: danger)),
+          ),
+        ),
+
+      PopupMenuItem(
+        onTap: () => showReasonSheet(
+          title: "Report",
+          description:
+              "Report this event to your server administrators, "
+              "who can take action like banning this server or room.",
+          action: "Report",
+          onConfirm: (reason) => ref
+              .read(ClientController.provider.notifier)
+              .reportEvent(
+                .new(
+                  roomId: roomId,
+                  eventId: eventId,
+                  reason: reason.isEmpty ? null : reason,
+                ),
+              ),
+        ),
+        child: ListTile(
+          leading: Icon(Icons.report, color: danger),
+          title: Text("Report", style: .new(color: danger)),
+        ),
+      ),
+    ]);
+  }
+}

lib/helpers/extensions/create_room.dart

@@ -0,0 +1,111 @@
+import "dart:async";
+
+import "package:collection/collection.dart";
+import "package:flutter_riverpod/flutter_riverpod.dart";
+import "package:material_ui/material_ui.dart";
+import "package:nexus/controllers/client.dart";
+import "package:nexus/controllers/rooms.dart";
+import "package:nexus/controllers/sidebar_page.dart";
+import "package:nexus/controllers/spaces.dart";
+import "package:nexus/helpers/extensions/focus_room.dart";
+import "package:nexus/helpers/extensions/get_all_child_rooms.dart";
+import "package:nexus/helpers/extensions/with_progress_snackbar.dart";
+import "package:nexus/models/requests/create_room.dart";
+
+extension CreateRoom on BuildContext {
+  /// Creates a room, showing progress and errors in snackbars, and opens it
+  /// once it has synced. [request] may be a future, so any lookups needed to
+  /// build it happen while the progress snackbar is shown.
+  ///
+  /// Returns the created room's ID, or null if creating it failed.
+  Future<String?> createRoom(
+    CreateRoomRequest request, {
+    required String name,
+  }) async {
+    final container = ProviderScope.containerOf(this);
+    final messenger = ScaffoldMessenger.of(this);
+
+    final result = await withProgressSnackbar("Creating $name...", () async {
+      final roomId = await container
+          .read(ClientController.provider.notifier)
+          .createRoom(request);
+
+      // Wait for the room to show up in the room list (under DMs, if it's
+      // one) before opening it.
+      final synced = Completer<bool>();
+      final subscription = container.listen(
+        SpacesController.provider.select(
+          (async) =>
+              async.value?.any(
+                (space) =>
+                    space.id == roomId ||
+                    ((!request.isDirect || space.id == "dms") &&
+                        space.allChildRooms.any(
+                          (room) => room.metadata?.id == roomId,
+                        )),
+              ) ??
+              false,
+        ),
+        (_, found) {
+          if (found && !synced.isCompleted) synced.complete(true);
+        },
+        fireImmediately: true,
+      );
+
+      return (
+        roomId,
+        await synced.future
+            .timeout(const .new(seconds: 15), onTimeout: () => false)
+            .whenComplete(subscription.close),
+      );
+    });
+    if (result == null) return null;
+
+    final (roomId, synced) = result;
+    if (synced && await container.focusRoom(roomId)) {
+      container.read(SidebarPageController.provider.notifier).set(.rooms);
+    } else {
+      messenger.showSnackBar(
+        .new(
+          content: Text("Created $name, but it hasn't finished syncing yet."),
+        ),
+      );
+    }
+
+    return roomId;
+  }
+
+  /// Opens the existing DM with [userId], or creates one if there isn't one.
+  Future<void> startDirectMessage(
+    String userId, {
+    required String name,
+    bool encrypted = true,
+    String? inviteReason,
+  }) async {
+    final container = ProviderScope.containerOf(this);
+    final existing = container
+        .read(RoomsController.provider)
+        .values
+        .firstWhereOrNull((room) => room.metadata?.dmUserId == userId)
+        ?.metadata
+        ?.id;
+
+    if (existing != null) {
+      if (await container.focusRoom(existing)) {
+        container.read(SidebarPageController.provider.notifier).set(.rooms);
+      }
+      return;
+    }
+
+    await createRoom(
+      .new(
+        isDirect: true,
+        preset: .trustedPrivateChat,
+        invite: .new([userId]),
+        inviteReason: inviteReason,
+        initialState: encrypted ? .new([.encryption]) : const .empty(),
+      ),
+      name: "a DM with $name",
+    );
+  }
+}

lib/helpers/extensions/displayname_color.dart

@@ -0,0 +1,38 @@
+import "package:flutter_riverpod/flutter_riverpod.dart";
+import "package:material_ui/material_ui.dart";
+import "package:nexus/controllers/room_power_levels.dart";
+import "package:nexus/controllers/settings.dart";
+import "package:nexus/helpers/extensions/string_to_color.dart";
+
+extension DisplaynameColor on WidgetRef {
+  /// The color of [userId]'s name in [roomId], from their power level
+  /// (so everyone with the same level shares one) or their user ID, depending
+  /// on the user's settings.
+  Color displaynameColor(String roomId, String userId) => switch (watch(
+    SettingsController.provider.select((settings) => settings.value?.nameColor),
+  )) {
+    .user => userId.colorHash,
+    .powerLevel || null => powerLevelColor(
+      watch(
+        RoomPowerLevelsController.provider(roomId)
+            .select((levels) => levels.levelOf(userId)),
+      ),
+    ),
+  };
+
+  /// Like [displaynameColor], for when [userId]'s [level] is already known,
+  /// like a level they're being given.
+  Color displaynameColorAt(String userId, double level) => switch (watch(
+    SettingsController.provider.select((settings) => settings.value?.nameColor),
+  )) {
+    .user => userId.colorHash,
+    .powerLevel || null => powerLevelColor(level),
+  };
+
+  static Color powerLevelColor(double level) => HSLColor.fromAHSL(
+    1,
+    level.isInfinite ? 30 : (210 + level / 50 * 137.50776) % 360,
+    0.7,
+    0.5,
+  ).toColor();
+}

lib/helpers/extensions/distributor_name.dart

@@ -0,0 +1,5 @@
+extension DistributorName on String {
+  String get distributorName => startsWith("nexus.federated.nexus")
+      ? "Google Play Services"
+      : split(".").last;
+}

lib/helpers/extensions/event_id_is_fake.dart

@@ -0,0 +1,3 @@
+extension EventIdIsFake on String {
+  bool get isFake => startsWith("~") || startsWith("\$gomuks");
+}

lib/helpers/extensions/focus_room.dart

@@ -0,0 +1,46 @@
+import "package:collection/collection.dart";
+import "package:flutter_riverpod/experimental/mutation.dart";
+import "package:nexus/controllers/jump_request.dart";
+import "package:nexus/controllers/key.dart";
+import "package:nexus/controllers/spaces.dart";
+import "package:nexus/models/space.dart";
+
+extension FocusRoom on MutationTarget {
+  Future<bool> focusRoom(String roomId, [int? eventRowId]) async {
+    final spaces = await container.read(SpacesController.provider.future);
+
+    if (spaces.firstWhereOrNull((space) => space.id == roomId) case Space _?) {
+      await container
+          .read(KeyController.provider(KeyController.spaceKey).notifier)
+          .set(roomId);
+      return true;
+    }
+
+    final parent = spaces.firstWhereOrNull(
+      (space) =>
+          space.children.any((room) => room.metadata?.id == roomId) ||
+          space.subSpaces.any(
+            (sub) =>
+                sub.room.metadata?.id == roomId ||
+                sub.children.any((room) => room.metadata?.id == roomId),
+          ),
+    );
+    if (parent == null) return false;
+
+    await container
+        .read(KeyController.provider(KeyController.spaceKey).notifier)
+        .set(parent.id);
+
+    if (eventRowId != null) {
+      container
+          .read(JumpRequestController.provider.notifier)
+          .request(roomId, eventRowId);
+    }
+
+    await container
+        .read(KeyController.provider(KeyController.roomKey).notifier)
+        .set(roomId);
+
+    return true;
+  }
+}

lib/helpers/extensions/get_all_child_rooms.dart

@@ -0,0 +1,8 @@
+import "package:fast_immutable_collections/fast_immutable_collections.dart";
+import "package:nexus/models/room.dart";
+import "package:nexus/models/space.dart";
+
+extension GetAllChildRooms on Space {
+  IList<Room> get allChildRooms =>
+      children.addAll(subSpaces.expand((s) => s.children));
+}