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Code Issues Projects Releases Wiki Activity

Register to conversation updates

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This commit is contained in:
Pierre HUBERT 2020-04-19 13:42:47 +02:00
parent dab4e7bde1
commit b0be889833
2 changed files with 43 additions and 18 deletions
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26
lib/helpers/conversations_helper.dart
View File

@ -1,6 +1,7 @@
import 'package:comunic/helpers/database/conversation_messages_database_helper.dart';
import 'package:comunic/helpers/database/conversations_database_helper.dart';
import 'package:comunic/helpers/users_helper.dart';
import 'package:comunic/helpers/websocket_helper.dart';
import 'package:comunic/lists/conversation_messages_list.dart';
import 'package:comunic/lists/conversations_list.dart';
import 'package:comunic/lists/users_list.dart';
@ -20,6 +21,8 @@ import 'package:meta/meta.dart';
enum SendMessageResult { SUCCESS, MESSAGE_REJECTED, FAILED }
class ConversationsHelper {
static final _registeredConversations = Map<int, int>();
final ConversationsDatabaseHelper _conversationsDatabaseHelper =
ConversationsDatabaseHelper();
final ConversationMessagesDatabaseHelper _conversationMessagesDatabaseHelper =
@ -356,6 +359,29 @@ class ConversationsHelper {
return await _conversationMessagesDatabaseHelper.delete(id);
}
/// Register a conversation : ask the server to notify about updates to the
/// conversation through WebSocket
Future<void> registerConversationEvents(int id) async {
if (_registeredConversations.containsKey(id))
_registeredConversations[id]++;
else {
_registeredConversations[id] = 1;
await ws("\$main/register_conv", {"convID": id});
}
}
/// Un-register to conversation update events
Future<void> unregisterConversationEvents(int id) async {
if (!_registeredConversations.containsKey(id)) return;
_registeredConversations[id]--;
if (_registeredConversations[id] <= 0) {
_registeredConversations.remove(id);
await ws("\$main/unregister_conv", {"convID": id});
}
}
/// Turn an API response into a ConversationMessage object
ConversationMessage _apiToConversationMessage({
@required int conversationID,

35
lib/ui/screens/conversation_screen.dart
View File

@ -7,6 +7,7 @@ import 'package:comunic/lists/users_list.dart';
import 'package:comunic/models/conversation_message.dart';
import 'package:comunic/models/new_conversation_message.dart';
import 'package:comunic/ui/tiles/conversation_message_tile.dart';
import 'package:comunic/ui/widgets/safe_state.dart';
import 'package:comunic/ui/widgets/scroll_watcher.dart';
import 'package:comunic/utils/files_utils.dart';
import 'package:comunic/utils/intl_utils.dart';
@ -32,7 +33,7 @@ class ConversationScreen extends StatefulWidget {
State<StatefulWidget> createState() => _ConversationScreenState();
}
class _ConversationScreenState extends State<ConversationScreen> {
class _ConversationScreenState extends SafeState<ConversationScreen> {
//Helpers
final ConversationsHelper _conversationsHelper = ConversationsHelper();
final UsersHelper _usersHelper = UsersHelper();
@ -44,27 +45,19 @@ class _ConversationScreenState extends State<ConversationScreen> {
bool _isMessageValid = false;
bool _isSendingMessage = false;
TextEditingController _textEditingController = TextEditingController();
Timer _refreshTime;
ScrollWatcher _scrollController;
_OlderMessagesLevel _loadingOlderMessages = _OlderMessagesLevel.NONE;
@override
void initState() {
super.initState();
_scrollController = ScrollWatcher(onReachBottom: _loadOlderMessages);
_init();
}
@override
void didChangeDependencies() {
super.didChangeDependencies();
_initializeLoading();
}
@override
void deactivate() {
super.deactivate();
if (_refreshTime != null) _refreshTime.cancel();
void dispose() {
super.dispose();
_deallocate();
}
void _setError(ErrorLevel err) => setState(() => _error = err);
@ -81,14 +74,20 @@ class _ConversationScreenState extends State<ConversationScreen> {
}
/// Load the first conversations
Future<void> _initializeLoading() async {
Future<void> _init() async {
_scrollController = ScrollWatcher(onReachBottom: _loadOlderMessages);
// Fetch latest messages
await _loadMessages(false);
await _loadMessages(true);
// Set a timer to regularly update conversation messages
if (_refreshTime == null || !_refreshTime.isActive)
_refreshTime = Timer.periodic(
Duration(milliseconds: 1500), (t) => _loadMessages(true));
await _conversationsHelper
.registerConversationEvents(widget.conversationID);
}
/// Free resources when this conversation widget is no longer required
void _deallocate() {
_conversationsHelper.unregisterConversationEvents(widget.conversationID);
}
/// Load a list of messages