refactor chatview

lib/widgets/room_chat/chat_timeline.dart

@@ -0,0 +1,76 @@
+import "package:fast_immutable_collections/fast_immutable_collections.dart";
+import "package:material_ui/material_ui.dart";
+import "package:hooks_riverpod/hooks_riverpod.dart";
+import "package:nexus/models/content/message.dart";
+import "package:nexus/models/event.dart";
+import "package:nexus/widgets/renderers/event.dart";
+import "package:nexus/widgets/highlight_wrapper.dart";
+import "package:nexus/widgets/error_dialog.dart";
+import "package:nexus/widgets/loading.dart";
+import "package:super_sliver_list/super_sliver_list.dart";
+
+class const ChatTimeline({
+  required final AsyncValue<IList<Event>?> controllerData,
+  required final ScrollController scrollController,
+  required final ListController listController,
+  required final bool hasMore,
+  required final Future<void> Function() loadOlder,
+  required final Future<void> Function(String) jumpToId,
+  required final IList<PopupMenuEntry> Function(Event) getEventOptions,
+  required final String? highlightedEvent,
+  required final double composerHeight,
+  super.key,
+}) extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) => switch (controllerData) {
+    AsyncData(:final value?) || AsyncLoading(:final value?) => CustomScrollView(
+      keyboardDismissBehavior: .onDrag,
+      controller: scrollController,
+      slivers: [
+        if (hasMore)
+          SliverToBoxAdapter(
+            child: Padding(
+              padding: .symmetric(vertical: 36),
+              child: Center(
+                child: ElevatedButton(
+                  onPressed: controllerData is AsyncData ? loadOlder : null,
+                  child: Text("Load More"),
+                ),
+              ),
+            ),
+          ),
+
+        SuperSliverList.builder(
+          listController: listController,
+          itemCount: value.length,
+          itemBuilder: (_, index) {
+            final event = value[index];
+            final previousEvent = value.getOrNull(index - 1);
+            return HighlightWrapper(
+              EventRenderer(
+                event,
+                onTapReply: () => jumpToId(event.replyTo!),
+                getEventOptions: getEventOptions,
+                isGrouped:
+                    previousEvent?.content is MessageContent &&
+                    previousEvent?.redactedBy == null &&
+                    previousEvent?.relationType != "m.replace" &&
+                    event.sender == previousEvent?.sender &&
+                    event.pmp?.id == previousEvent?.pmp?.id,
+              ),
+              isHighlighted: highlightedEvent == event.eventId,
+            );
+          },
+        ),
+
+        SliverPadding(padding: .only(bottom: composerHeight)),
+      ],
+    ),
+    AsyncData() => Center(child: Text("Nothing to see here...")),
+    AsyncLoading() => Loading(),
+    AsyncError(:final error, :final stackTrace) => ErrorDialog(
+      error,
+      stackTrace,
+    ),
+  };
+}