extract chat (#10362)

* extract chatTextarea from group/tavern - extract staffList array

* fix lint / rewrite condition

* clean up - part 1

* rename chatTextarea to chat

* refactor timestamp check

website/server/models/group.js

@@ -346,7 +346,11 @@ schema.statics.toJSONCleanChat = async function groupToJSONCleanChat (group, use
 
   // Convert to timestamps because Android expects it
   toJSON.chat.forEach(chat => {
-    chat.timestamp = chat.timestamp ? chat.timestamp.getTime() : new Date().getTime();
+    // old chats are saved with a numeric timestamp
+    // new chats use `Date` which then has to be converted to the numeric timestamp
+    if (chat.timestamp.getTime) {
+      chat.timestamp = chat.timestamp.getTime();
+    }
   });
 
   return toJSON;
@@ -1537,4 +1541,4 @@ if (!nconf.get('IS_TEST')) {
       privacy: 'public',
     }).save();
   });
-}
+}