Register to post events

lib/helpers/posts_helper.dart

@@ -4,6 +4,7 @@ import 'package:comunic/enums/post_visibility_level.dart';
 import 'package:comunic/enums/user_access_levels.dart';
 import 'package:comunic/helpers/comments_helper.dart';
 import 'package:comunic/helpers/survey_helper.dart';
+import 'package:comunic/helpers/websocket_helper.dart';
 import 'package:comunic/lists/comments_list.dart';
 import 'package:comunic/lists/posts_list.dart';
 import 'package:comunic/models/api_request.dart';
@@ -46,6 +47,12 @@ const _APIPostsTargetKindsMap = {
 };
 
 class PostsHelper {
+  /// Stores the list of posts we are registered to
+  ///
+  /// First int = post ID
+  /// Second int = number of registered people
+  static final _registeredPosts = Map<int, int>();
+
   /// Get the list of latest posts. Return the list of posts or null in case of
   /// failure
   Future<PostsList> getLatest({int from = 0}) async {
@@ -69,8 +76,7 @@ class PostsHelper {
   /// Get the list of posts of a user
   Future<PostsList> getUserPosts(int userID, {int from = 0}) async {
     final response = await (APIRequest(uri: "posts/get_user", needLogin: true)
-          ..addInt("userID", userID)
-          ..addInt("startFrom", from == 0 ? 0 : from - 1))
+      ..addInt("userID", userID)..addInt("startFrom", from == 0 ? 0 : from - 1))
         .exec();
 
     if (response.code != 200) return null;
@@ -87,8 +93,7 @@ class PostsHelper {
   /// Get the list of posts of a group
   Future<PostsList> getGroupPosts(int groupID, {int from = 0}) async {
     final response = await (APIRequest(uri: "posts/get_group", needLogin: true)
-          ..addInt("groupID", groupID)
-          ..addInt("startFrom", from == 0 ? 0 : from - 1))
+      ..addInt("groupID", groupID)..addInt("startFrom", from == 0 ? 0 : from - 1))
         .exec();
 
     if (response.code != 200) return null;
@@ -185,6 +190,28 @@ class PostsHelper {
         .isOK;
   }
 
+  /// Register to a post events
+  Future<void> registerPostEvents(int id) async {
+    if (_registeredPosts.containsKey(id))
+      _registeredPosts[id]++;
+    else {
+      _registeredPosts[id] = 1;
+      await ws("\$main/register_post", {"postID": id});
+    }
+  }
+
+  /// Un-register to post events
+  Future<void> unregisterPostEvents(int id) async {
+    if (!_registeredPosts.containsKey(id)) return;
+
+    _registeredPosts[id]--;
+
+    if (_registeredPosts[id] <= 0) {
+      _registeredPosts.remove(id);
+      await ws("\$main/unregister_post", {"postID": id});
+    }
+  }
+
   /// Turn an API entry into a [Post] object
   Post _apiToPost(Map<String, dynamic> map) {
     final postKind = _APIPostsKindsMap[map["kind"]];

lib/ui/tiles/post_tile.dart

@@ -591,7 +591,8 @@ class _PostTileState extends State<PostTile> {
       context: context,
       title: tr("Update post content"),
       message: tr("Please enter message content: "),
-      defaultValue: widget.post.content.isNull == null ? "" : widget.post.content.content,
+      defaultValue:
+      widget.post.content.isNull == null ? "" : widget.post.content.content,
       hint: tr("Post content"),
     );
 

lib/ui/widgets/posts_list_widget.dart

@@ -1,4 +1,5 @@
 import 'package:comunic/helpers/groups_helper.dart';
+import 'package:comunic/helpers/posts_helper.dart';
 import 'package:comunic/helpers/users_helper.dart';
 import 'package:comunic/lists/groups_list.dart';
 import 'package:comunic/lists/posts_list.dart';
@@ -6,6 +7,7 @@ import 'package:comunic/lists/users_list.dart';
 import 'package:comunic/models/post.dart';
 import 'package:comunic/ui/screens/conversation_screen.dart';
 import 'package:comunic/ui/tiles/post_tile.dart';
+import 'package:comunic/ui/widgets/safe_state.dart';
 import 'package:comunic/ui/widgets/scroll_watcher.dart';
 import 'package:comunic/utils/intl_utils.dart';
 import 'package:comunic/utils/ui_utils.dart';
@@ -41,7 +43,7 @@ class PostsListWidget extends StatefulWidget {
   State<StatefulWidget> createState() => PostsListWidgetState();
 }
 
-class PostsListWidgetState extends State<PostsListWidget> {
+class PostsListWidgetState extends SafeState<PostsListWidget> {
   // Helpers
   final UsersHelper _usersHelper = UsersHelper();
   final GroupsHelper _groupsHelper = GroupsHelper();
@@ -54,6 +56,8 @@ class PostsListWidgetState extends State<PostsListWidget> {
   ErrorLevel _error = ErrorLevel.NONE;
   bool _loading = false;
 
+  final _registeredPosts = Set<int>();
+
   set error(ErrorLevel err) => setState(() => _error = err);
 
   @override
@@ -63,6 +67,22 @@ class PostsListWidgetState extends State<PostsListWidget> {
     _scrollController = ScrollWatcher(onReachBottom: reachedPostsBottom);
   }
 
+  @override
+  void dispose() {
+    super.dispose();
+
+    _unregisterAllPosts();
+  }
+
+  @override
+  void setState(fn) {
+    if (!mounted) return;
+    super.setState(fn);
+
+    // Register for posts update
+    _registerRequiredPosts();
+  }
+
   @override
   void didChangeDependencies() {
     super.didChangeDependencies();
@@ -111,6 +131,37 @@ class PostsListWidgetState extends State<PostsListWidget> {
     _loading = false;
   }
 
+  /// Register for potential new posts
+  void _registerRequiredPosts() async {
+    if (_list == null) return;
+
+    final missing = _list
+        .where((f) => !_registeredPosts.contains(f.id))
+        .map((f) => f.id)
+        .toSet();
+
+    _registeredPosts.addAll(missing);
+
+    for (final postID in missing) {
+      await PostsHelper().registerPostEvents(postID);
+    }
+  }
+
+  /// Unregister from all posts
+  ///
+  /// This method should be called only once
+  void _unregisterAllPosts() async {
+    for (final postID in _registeredPosts) {
+      // We put the try - catch here because we must absolutely unregister ALL
+      // POSTS event if one post fails to remove
+      try {
+        await PostsHelper().unregisterPostEvents(postID);
+      } catch (e, stack) {
+        print("Could not unregister post! $e $stack");
+      }
+    }
+  }
+
   Widget _buildErrorCard() {
     return buildErrorCard(tr("Could not get the list of posts !"));
   }

lib/ui/widgets/text_widget.dart

@@ -1,5 +1,4 @@
 import 'package:comunic/models/displayed_content.dart';
-import 'package:comunic/utils/bbcode_parser.dart';
 import 'package:comunic/utils/input_utils.dart';
 import 'package:comunic/utils/navigation_utils.dart';
 import 'package:flutter/material.dart';
@@ -37,11 +36,11 @@ class TextWidget extends StatelessWidget {
     var content = this.content.parsedString;
 
     // Parse BBcode
-    if (parseBBcode)
+    /*if (parseBBcode)
       return BBCodeParsedWidget(
         text: content,
         parseCallback: (style, text) => _parseLinks(context, text, style),
-      );
+      );*/
 
     // Just parse link
     return RichText(