fix(whatsapp): handle LID group mentions (#2663)

Co-authored-by: Xubin Ren <52506698+Re-bin@users.noreply.github.com>

bridge/src/whatsapp.ts

@@ -26,10 +26,12 @@ export interface InboundMessage {
   id: string;
   sender: string;
   pn: string;
+  participant?: string;
   content: string;
   timestamp: number;
   isGroup: boolean;
   wasMentioned?: boolean;
+  isReplyToBot?: boolean;
   media?: string[];
 }
 
@@ -50,28 +52,49 @@ export class WhatsAppClient {
   }
 
   private normalizeJid(jid: string | undefined | null): string {
-    return (jid || '').split(':')[0];
+    return (jid || '').trim().toLowerCase().replace(/:\d+(?=@)/g, '');
   }
 
-  private wasMentioned(msg: any): boolean {
+  private selfJids(): Set<string> {
-    if (!msg?.key?.remoteJid?.endsWith('@g.us')) return false;
+    return new Set(
-
-    const candidates = [
-      msg?.message?.extendedTextMessage?.contextInfo?.mentionedJid,
-      msg?.message?.imageMessage?.contextInfo?.mentionedJid,
-      msg?.message?.videoMessage?.contextInfo?.mentionedJid,
-      msg?.message?.documentMessage?.contextInfo?.mentionedJid,
-      msg?.message?.audioMessage?.contextInfo?.mentionedJid,
-    ];
-    const mentioned = candidates.flatMap((items) => (Array.isArray(items) ? items : []));
-    if (mentioned.length === 0) return false;
-
-    const selfIds = new Set(
       [this.sock?.user?.id, this.sock?.user?.lid, this.sock?.user?.jid]
         .map((jid) => this.normalizeJid(jid))
         .filter(Boolean),
     );
-    return mentioned.some((jid: string) => selfIds.has(this.normalizeJid(jid)));
+  }
+
+  private messageContextInfos(msg: any): any[] {
+    const unwrapped = baileysExtractMessageContent(msg?.message);
+    const containers = [msg?.message, unwrapped];
+    const infos = containers.flatMap((message) => [
+      message?.extendedTextMessage?.contextInfo,
+      message?.imageMessage?.contextInfo,
+      message?.videoMessage?.contextInfo,
+      message?.documentMessage?.contextInfo,
+      message?.audioMessage?.contextInfo,
+    ]);
+    return infos.filter(Boolean);
+  }
+
+  private botAddressing(msg: any): { wasMentioned: boolean; isReplyToBot: boolean } {
+    if (!msg?.key?.remoteJid?.endsWith('@g.us')) {
+      return { wasMentioned: false, isReplyToBot: false };
+    }
+
+    const selfIds = this.selfJids();
+    const contextInfos = this.messageContextInfos(msg);
+
+    const mentioned = contextInfos.flatMap((info) => (
+      Array.isArray(info?.mentionedJid) ? info.mentionedJid : []
+    ));
+    const wasMentioned = mentioned.some((jid: string) => selfIds.has(this.normalizeJid(jid)));
+
+    const isReplyToBot = contextInfos.some((info) => {
+      const quotedParticipant = this.normalizeJid(info?.participant);
+      return Boolean(info?.stanzaId && quotedParticipant && selfIds.has(quotedParticipant));
+    });
+
+    return { wasMentioned, isReplyToBot };
   }
 
   async connect(): Promise<void> {
@@ -175,16 +198,17 @@ export class WhatsAppClient {
         if (!finalContent && mediaPaths.length === 0) continue;
 
         const isGroup = msg.key.remoteJid?.endsWith('@g.us') || false;
-        const wasMentioned = this.wasMentioned(msg);
+        const { wasMentioned, isReplyToBot } = this.botAddressing(msg);
 
         this.options.onMessage({
           id: msg.key.id || '',
           sender: msg.key.remoteJid || '',
           pn: msg.key.remoteJidAlt || '',
+          ...(isGroup && msg.key.participant ? { participant: msg.key.participant } : {}),
           content: finalContent,
           timestamp: msg.messageTimestamp as number,
           isGroup,
-          ...(isGroup ? { wasMentioned } : {}),
+          ...(isGroup ? { wasMentioned: wasMentioned || isReplyToBot, isReplyToBot } : {}),
           ...(mediaPaths.length > 0 ? { media: mediaPaths } : {}),
         });
       }

nanobot/channels/whatsapp.py

@@ -216,7 +216,7 @@ class WhatsAppChannel(BaseChannel):
 
             # Extract just the phone number or lid as chat_id
             is_group = data.get("isGroup", False)
-            was_mentioned = data.get("wasMentioned", False)
+            was_mentioned = bool(data.get("wasMentioned", False) or data.get("isReplyToBot", False))
 
             if is_group and getattr(self.config, "group_policy", "open") == "mention":
                 if not was_mentioned:
@@ -225,7 +225,8 @@ class WhatsAppChannel(BaseChannel):
             # Classify by JID suffix: @s.whatsapp.net = phone, @lid.whatsapp.net = LID
             # The bridge's pn/sender fields don't consistently map to phone/LID across versions.
             raw_a = pn or ""
-            raw_b = sender or ""
+            participant = data.get("participant", "")
+            raw_b = participant or sender or ""
             id_a = raw_a.split("@")[0] if "@" in raw_a else raw_a
             id_b = raw_b.split("@")[0] if "@" in raw_b else raw_b
 
@@ -289,6 +290,8 @@ class WhatsAppChannel(BaseChannel):
                     "message_id": message_id,
                     "timestamp": data.get("timestamp"),
                     "is_group": data.get("isGroup", False),
+                    "participant": participant or None,
+                    "is_reply_to_bot": data.get("isReplyToBot", False),
                 },
             )
 

tests/channels/test_whatsapp_channel.py

@@ -163,6 +163,32 @@ async def test_group_policy_mention_accepts_mentioned_group_message():
     assert kwargs["sender_id"] == "user"
 
 
+@pytest.mark.asyncio
+async def test_group_policy_mention_accepts_reply_to_bot_message():
+    ch = WhatsAppChannel({"enabled": True, "allowFrom": ["*"], "groupPolicy": "mention"}, MagicMock())
+    ch._handle_message = AsyncMock()
+
+    await ch._handle_bridge_message(
+        json.dumps(
+            {
+                "type": "message",
+                "id": "m-reply",
+                "sender": "12345@g.us",
+                "pn": "user@s.whatsapp.net",
+                "content": "replying to bot",
+                "timestamp": 1,
+                "isGroup": True,
+                "wasMentioned": False,
+                "isReplyToBot": True,
+            }
+        )
+    )
+
+    ch._handle_message.assert_awaited_once()
+    kwargs = ch._handle_message.await_args.kwargs
+    assert kwargs["metadata"]["is_reply_to_bot"] is True
+
+
 @pytest.mark.asyncio
 async def test_sender_id_prefers_phone_jid_over_lid():
     """sender_id should resolve to phone number when @s.whatsapp.net JID is present."""
@@ -184,6 +210,30 @@ async def test_sender_id_prefers_phone_jid_over_lid():
     assert kwargs["sender_id"] == "5551234"
 
 
+@pytest.mark.asyncio
+async def test_group_sender_id_uses_participant_when_phone_jid_missing():
+    """Group messages should identify the participant, not the group chat JID."""
+    ch = WhatsAppChannel({"enabled": True, "allowFrom": ["SENDERLID"]}, MagicMock())
+    ch._handle_message = AsyncMock()
+
+    await ch._handle_bridge_message(
+        json.dumps({
+            "type": "message",
+            "id": "group-lid",
+            "sender": "12345@g.us",
+            "pn": "",
+            "participant": "SENDERLID@lid.whatsapp.net",
+            "content": "hi",
+            "timestamp": 1,
+            "isGroup": True,
+        })
+    )
+
+    kwargs = ch._handle_message.await_args.kwargs
+    assert kwargs["sender_id"] == "SENDERLID"
+    assert kwargs["metadata"]["participant"] == "SENDERLID@lid.whatsapp.net"
+
+
 @pytest.mark.asyncio
 async def test_lid_to_phone_cache_resolves_lid_only_messages():
     """When only LID is present, a cached LID→phone mapping should be used."""