add per-room notif overrides

Fixes #163

lib/controllers/account_data.dart

@@ -8,6 +8,7 @@ import "package:nexus/controllers/client.dart";
 import "package:nexus/models/account_data.dart";
 import "package:nexus/models/push_rules.dart";
 import "package:nexus/models/requests/update_push_rule.dart";
+import "package:nexus/models/room_notification_level.dart";
 import "package:nexus/models/sync_data.dart";
 
 class AccountDataController extends Notifier<AccountData> {
@@ -98,6 +99,27 @@ class AccountDataController extends Notifier<AccountData> {
         (rules) => rules.find(kind, ruleId) == null,
       );
 
+  /// Replaces the push rules for the room with [roomId] with those [level]
+  /// needs, deleting them first so disabled ones don't stay disabled.
+  Future<void> setRoomNotificationLevel(
+    String roomId,
+    RoomNotificationLevel level,
+  ) async {
+    final rules = state.pushRules.global;
+    if (RoomNotificationLevel.of(rules, roomId) == level) return;
+
+    return _updatePushRules(
+      .new([
+        ...[PushRuleKind.override, PushRuleKind.room]
+            .where((kind) => rules.find(kind, roomId) != null)
+            .map((kind) => .new(kind: kind, ruleId: roomId, action: .delete)),
+        if (level.ruleFor(roomId) case (:final kind, :final rule))
+          .new(kind: kind, ruleId: roomId, action: .put, newContent: rule),
+      ]),
+      (rules) => RoomNotificationLevel.of(rules, roomId) == level,
+    );
+  }
+
   /// Sends [requests] in order, then waits until [arrived] is true for the
   /// synced push rules.
   Future<void> _updatePushRules(

lib/models/push_rules.dart

@@ -15,18 +15,20 @@ class const PushRules({final PushRuleset global = const .new()})
       _$PushRulesFromJson(json);
 }
 
-/// Push rules by kind, apart from room and sender rules, which Nexus doesn't
-/// use. The first rule that matches decides what happens.
+/// Push rules by kind, apart from sender rules, which Nexus doesn't use. The
+/// first rule that matches decides what happens.
 @Freezed(toJson: false, fromJson: false)
 @JsonSerializable()
 class const PushRuleset({
   final IList<PushRule> override = const .empty(),
   final IList<PushRule> content = const .empty(),
+  final IList<PushRule> room = const .empty(),
   final IList<PushRule> underride = const .empty(),
 }) with _$PushRuleset {
   IList<PushRule> ofKind(PushRuleKind kind) => switch (kind) {
     .override => override,
     .content => content,
+    .room => room,
     .underride => underride,
   };
 
@@ -46,7 +48,7 @@ class const PushRuleset({
       _$PushRulesetFromJson(json);
 }
 
-enum PushRuleKind { override, content, underride }
+enum PushRuleKind { override, content, room, underride }
 
 @Freezed(toJson: false, fromJson: false)
 @JsonSerializable()
@@ -60,6 +62,9 @@ class const PushRule({
 
   /// What content rules match in messages' bodies.
   final String? pattern,
+
+  /// What override and underride rules match.
+  final IList<PushCondition> conditions = const .empty(),
 }) with _$PushRule {
   Map<String, Object?> toJson() => _$PushRuleToJson(this);
 
@@ -67,6 +72,24 @@ class const PushRule({
       _$PushRuleFromJson(json);
 }
 
+/// Only the fields of event_match conditions are kept.
+@Freezed(toJson: false, fromJson: false)
+@JsonSerializable()
+class const PushCondition({
+  required final String kind,
+  final String? key,
+  final String? pattern,
+}) with _$PushCondition {
+  /// Matches events in the room with [roomId].
+  factory PushCondition.inRoom(String roomId) =>
+      .new(kind: "event_match", key: "room_id", pattern: roomId);
+
+  Map<String, Object?> toJson() => _$PushConditionToJson(this);
+
+  factory PushCondition.fromJson(Map<String, Object?> json) =>
+      _$PushConditionFromJson(json);
+}
+
 /// What happens when a push rule matches. Actions Nexus doesn't support are
 /// dropped, so they're replaced when these are changed.
 @Freezed(toJson: false, fromJson: false)

lib/models/room_notification_level.dart

@@ -0,0 +1,49 @@
+import "package:material_ui/material_ui.dart";
+import "package:nexus/models/push_rules.dart";
+
+enum RoomNotificationLevel(
+  final String title,
+  final String description,
+  final IconData icon,
+) {
+  global(
+    "Default",
+    "Follows your global notification rules.",
+    Icons.notifications,
+  ),
+  allMessages(
+    "All Messages",
+    "Every message notifies you.",
+    Icons.notifications_active,
+  ),
+  mentionsAndKeywords(
+    "Mentions & Keywords",
+    "Only messages that mention you or contain your keywords notify you.",
+    Icons.alternate_email,
+  ),
+  mute("Mute", "Nothing in this room notifies you.", Icons.notifications_off);
+
+  static RoomNotificationLevel of(PushRuleset ruleset, String roomId) =>
+      switch ((ruleset.find(.override, roomId), ruleset.find(.room, roomId))) {
+        (PushRule(enabled: true, actions: PushActions(notify: false)), _) =>
+          .mute,
+        (_, PushRule(enabled: true, actions: PushActions(notify: true))) =>
+          .allMessages,
+        (_, PushRule(enabled: true)) => .mentionsAndKeywords,
+        _ => .global,
+      };
+
+  ({PushRuleKind kind, PushRule rule})? ruleFor(String roomId) =>
+      switch (this) {
+        .global => null,
+        .allMessages => (
+          kind: .room,
+          rule: .new(ruleId: roomId, actions: .notifyWithSound),
+        ),
+        .mentionsAndKeywords => (kind: .room, rule: .new(ruleId: roomId)),
+        .mute => (
+          kind: .override,
+          rule: .new(ruleId: roomId, conditions: .new([.inRoom(roomId)])),
+        ),
+      };
+}

lib/widgets/room_menu_button.dart

@@ -5,7 +5,9 @@ import "package:nexus/helpers/extensions/get_localpart.dart";
 import "package:nexus/helpers/extensions/show_leave_room_sheet.dart";
 import "package:flutter/services.dart";
 import "package:flutter_riverpod/flutter_riverpod.dart";
+import "package:nexus/controllers/account_data.dart";
 import "package:nexus/controllers/client.dart";
+import "package:nexus/models/room_notification_level.dart";
 import "package:nexus/controllers/room_settings_sections.dart";
 import "package:nexus/widgets/settings/settings_layout.dart";
 import "package:nexus/controllers/via.dart";
@@ -44,6 +46,44 @@ final class const RoomMenuButton(
           ),
         ),
         if (room != null) ...[
+          PopupMenuItem(
+            onTap: () async {
+              final roomId = room!.metadata!.id;
+              final accountData = ref.read(
+                AccountDataController.provider.notifier,
+              );
+              final current = RoomNotificationLevel.of(
+                ref.read(AccountDataController.provider).pushRules.global,
+                roomId,
+              );
+
+              final level = await context.showAdaptiveMenu(
+                RoomNotificationLevel.values
+                    .map(
+                      (level) => PopupMenuItem(
+                        value: level,
+                        child: ListTile(
+                          selected: level == current,
+                          leading: Icon(level.icon),
+                          title: Text(level.title),
+                          subtitle: Text(level.description),
+                          trailing: level == current ? Icon(Icons.check) : null,
+                        ),
+                      ),
+                    )
+                    .toList(),
+              );
+              if (level == null) return;
+              await accountData
+                  .setRoomNotificationLevel(roomId, level)
+                  .onError(showError);
+            },
+            child: ListTile(
+              leading: Icon(Icons.notifications),
+              title: Text("Notifications"),
+              trailing: Icon(Icons.expand_more),
+            ),
+          ),
           PopupMenuItem(
             onTap: () async {
               final vias = ref.read(ViaController.provider(room!)).viaQuery;