feat(worker): seal WhatsApp adapter — normalize inside session, reactions handled internally

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/worker/src/whatsapp/normalizer.ts

@@ -1,12 +1,5 @@
 import { proto } from '@whiskeysockets/baileys';
-
-export interface NormalizedMessage {
-  platformMsgId: string;
-  sourceGroupJid: string;
-  senderJid: string;
-  senderName?: string;
-  content: string;
-}
+import { NormalizedMessage, NormalizedReaction } from '@tower/types';
 
 function extractText(msg: proto.IWebMessageInfo): string {
   const m = msg.message;
@@ -21,18 +14,16 @@ function extractText(msg: proto.IWebMessageInfo): string {
   );
 }
 
-export function normalizeMessage(msg: proto.IWebMessageInfo): NormalizedMessage | null {
+export function normalizeMessage(
+  msg: proto.IWebMessageInfo,
+  accountId: string,
+): NormalizedMessage | null {
   const key = msg.key;
   if (!key) return null;
 
   const remoteJid = key.remoteJid ?? '';
-
-  // Only process group messages (group JIDs end with @g.us)
   if (!remoteJid.endsWith('@g.us')) return null;
-
-  // Skip our own outgoing messages
   if (key.fromMe) return null;
-
   if (!msg.message) return null;
 
   const platformMsgId = key.id;
@@ -46,5 +37,32 @@ export function normalizeMessage(msg: proto.IWebMessageInfo): NormalizedMessage
     senderJid: key.participant ?? '',
     senderName: msg.pushName ?? undefined,
     content,
+    accountId,
+  };
+}
+
+export function normalizeReaction(
+  msg: proto.IWebMessageInfo,
+  accountId: string,
+): NormalizedReaction | null {
+  const key = msg.key;
+  if (!key) return null;
+
+  const remoteJid = key.remoteJid ?? '';
+  if (!remoteJid.endsWith('@g.us')) return null;
+  if (key.fromMe) return null;
+
+  const reaction = msg.message?.reactionMessage;
+  if (!reaction) return null;
+
+  const targetMsgId = reaction.key?.id;
+  if (!targetMsgId) return null;
+
+  return {
+    reactorJid: key.participant ?? '',
+    targetMsgId,
+    sourceGroupJid: remoteJid,
+    emoji: reaction.text ?? '',
+    accountId,
   };
 }