Filter chat spam

lichess-org · Dec 12, 2024 · 5c44151 · 5c44151
1 parent 4c3a246
commit 5c44151
Show file tree

Hide file tree

Showing 2 changed files with 78 additions and 32 deletions.
diff --git a/lib/src/model/game/chat_controller.dart b/lib/src/model/game/chat_controller.dart
@@ -125,14 +125,8 @@ class ChatController extends _$ChatController {
       }
     } else if (event.topic == 'message') {
       final data = event.data as Map<String, dynamic>;
-      final message = data['t'] as String;
-      final username = data['u'] as String?;
-      _addMessage(
-        (
-          message: message,
-          username: username,
-        ),
-      );
+      final message = _messageFromPick(RequiredPick(data));
+      _addMessage(message);
     }
   }
 }
@@ -147,11 +141,58 @@ class ChatState with _$ChatState {
   }) = _ChatState;
 }
 
-typedef Message = ({String? username, String message});
+typedef Message = ({
+  String? username,
+  String message,
+  bool troll,
+  bool deleted,
+});
 
 Message _messageFromPick(RequiredPick pick) {
   return (
     message: pick('t').asStringOrThrow(),
     username: pick('u').asStringOrNull(),
+    troll: pick('r').asBoolOrNull() ?? false,
+    deleted: pick('d').asBoolOrNull() ?? false,
   );
 }
+
+bool isSpam(Message message) {
+  return spamRegex.hasMatch(message.message) ||
+      followMeRegex.hasMatch(message.message);
+}
+
+final RegExp spamRegex = RegExp(
+  [
+    'xcamweb.com',
+    '(^|[^i])chess-bot',
+    'chess-cheat',
+    'coolteenbitch',
+    'letcafa.webcam',
+    'tinyurl.com/',
+    'wooga.info/',
+    'bit.ly/',
+    'wbt.link/',
+    'eb.by/',
+    '001.rs/',
+    'shr.name/',
+    'u.to/',
+    '.3-a.net',
+    '.ssl443.org',
+    '.ns02.us',
+    '.myftp.info',
+    '.flinkup.com',
+    '.serveusers.com',
+    'badoogirls.com',
+    'hide.su',
+    'wyon.de',
+    'sexdatingcz.club',
+    'qps.ru',
+    'tiny.cc/',
+    'trasderk.blogspot.com',
+    't.ly/',
+    'shorturl.at/',
+  ].map((url) => url.replaceAll('.', '\\.').replaceAll('/', '\\/')).join('|'),
+);
+
+final followMeRegex = RegExp('follow me|join my team', caseSensitive: false);
diff --git a/lib/src/view/game/message_screen.dart b/lib/src/view/game/message_screen.dart
@@ -83,29 +83,34 @@ class _Body extends ConsumerWidget {
           child: GestureDetector(
             onTap: () => FocusScope.of(context).unfocus(),
             child: chatStateAsync.when(
-              data: (chatState) => ListView.builder(
-                // remove the automatic bottom padding of the ListView, which on iOS
-                // corresponds to the safe area insets
-                // and which is here taken care of by the _ChatBottomBar
-                padding: MediaQuery.of(context).padding.copyWith(bottom: 0),
-                reverse: true,
-                itemCount: chatState.messages.length,
-                itemBuilder: (context, index) {
-                  final message =
-                      chatState.messages[chatState.messages.length - index - 1];
-                  return (message.username == 'lichess')
-                      ? _MessageAction(message: message.message)
-                      : (message.username == me?.name)
-                          ? _MessageBubble(
-                              you: true,
-                              message: message.message,
-                            )
-                          : _MessageBubble(
-                              you: false,
-                              message: message.message,
-                            );
-                },
-              ),
+              data: (chatState) {
+                final selectedMessages = chatState.messages
+                    .where((m) => !m.troll && !m.deleted && !isSpam(m))
+                    .toList();
+                final messagesCount = selectedMessages.length;
+                return ListView.builder(
+                  // remove the automatic bottom padding of the ListView, which on iOS
+                  // corresponds to the safe area insets
+                  // and which is here taken care of by the _ChatBottomBar
+                  padding: MediaQuery.of(context).padding.copyWith(bottom: 0),
+                  reverse: true,
+                  itemCount: messagesCount,
+                  itemBuilder: (context, index) {
+                    final message = selectedMessages[messagesCount - index - 1];
+                    return (message.username == 'lichess')
+                        ? _MessageAction(message: message.message)
+                        : (message.username == me?.name)
+                            ? _MessageBubble(
+                                you: true,
+                                message: message.message,
+                              )
+                            : _MessageBubble(
+                                you: false,
+                                message: message.message,
+                              );
+                  },
+                );
+              },
               loading: () => const Center(
                 child: CircularProgressIndicator(),
               ),