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[FIX] chat: fix message pagination logic

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`loadInitial()` fetched 100 messages while `_page_size` was 20,
so `_has_more` turned false too early and history stopped around
10h back. `loadMore()` also used `_currentPage * _page_size`
for offset, causing duplicates.

Use `_page_size` for initial load and rely on current message
count as offset. This removes `_currentPage` entirely and lets
older messages load correctly.

Signed-off-by: Texas0295 <kimura@texas0295.top>
This commit is contained in:
Texas0295
2025-09-17 19:36:51 +08:00
parent 313af28d7f
commit 7b238f32fd
1 changed files with 33 additions and 35 deletions
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68
lib/screens/chat/room.dart
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@@ -289,7 +289,6 @@ class MessagesNotifier extends _$MessagesNotifier {
bool? _withAttachments;
late final String _roomId;
int _currentPage = 0;
static const int _pageSize = 20;
bool _hasMore = true;
bool _isSyncing = false;
@@ -565,47 +564,46 @@ class MessagesNotifier extends _$MessagesNotifier {
}
}
Future<void> loadInitial() async {
developer.log('Loading initial messages', name: 'MessagesNotifier');
if (_searchQuery == null || _searchQuery!.isEmpty) {
syncMessages();
}
final messages = await _getCachedMessages(offset: 0, take: 100);
_currentPage = 0;
_hasMore = messages.length == _pageSize;
state = AsyncValue.data(messages);
Future<void> loadInitial() async {
developer.log('Loading initial messages', name: 'MessagesNotifier');
if (_searchQuery == null || _searchQuery!.isEmpty) {
syncMessages();
}
Future<void> loadMore() async {
if (!_hasMore || state is AsyncLoading) return;
developer.log('Loading more messages', name: 'MessagesNotifier');
final messages = await _getCachedMessages(offset: 0, take: _pageSize);
try {
final currentMessages = state.value ?? [];
_currentPage++;
final newMessages = await listMessages(
offset: _currentPage * _pageSize,
take: _pageSize,
);
_hasMore = messages.length == _pageSize;
if (newMessages.isEmpty || newMessages.length < _pageSize) {
_hasMore = false;
}
state = AsyncValue.data(messages);
}
state = AsyncValue.data(
_sortMessages([...currentMessages, ...newMessages]),
);
} catch (err, stackTrace) {
developer.log(
'Error loading more messages',
name: 'MessagesNotifier',
error: err,
stackTrace: stackTrace,
);
showErrorAlert(err);
_currentPage--;
Future<void> loadMore() async {
if (!_hasMore || state is AsyncLoading) return;
developer.log('Loading more messages', name: 'MessagesNotifier');
try {
final currentMessages = state.value ?? [];
final offset = currentMessages.length;
final newMessages = await listMessages(offset: offset, take: _pageSize);
if (newMessages.isEmpty || newMessages.length < _pageSize) {
_hasMore = false;
}
state = AsyncValue.data(
_sortMessages([...currentMessages, ...newMessages]),
);
} catch (err, stackTrace) {
developer.log(
'Error loading more messages',
name: 'MessagesNotifier',
error: err,
stackTrace: stackTrace,
);
showErrorAlert(err);
}
}
Future<void> sendMessage(
String content,