Handle incoming remove messages

blink/messages.py

@@ -327,7 +327,7 @@ class OTRInternalMessage(BlinkMessage):
 @implementer(IObserver)
 class OutgoingMessage(object):
     __ignored_content_types__ = {IsComposingDocument.content_type, IMDNDocument.content_type}  # Content types to ignore in notifications
-    __disabled_imdn_content_types__ = {'text/pgp-public-key', 'text/pgp-private-key'}.union(__ignored_content_types__)  # Content types to ignore in notifications
+    __disabled_imdn_content_types__ = {'text/pgp-public-key', 'text/pgp-private-key', 'application/sylk-api-message-remove'}.union(__ignored_content_types__)  # Content types to ignore in notifications
 
     def __init__(self, account, contact, content, content_type='text/plain', recipients=None, courtesy_recipients=None, subject=None, timestamp=None, required=None, additional_headers=None, id=None, session=None):
         self.lookup = None
@@ -583,7 +583,7 @@ class RequestList(list):
 
 @implementer(IObserver)
 class MessageManager(object, metaclass=Singleton):
-    __ignored_content_types__ = {IsComposingDocument.content_type, IMDNDocument.content_type, 'text/pgp-public-key', 'text/pgp-private-key'}
+    __ignored_content_types__ = {IsComposingDocument.content_type, IMDNDocument.content_type, 'text/pgp-public-key', 'text/pgp-private-key', 'application/sylk-message-remove'}
 
     def __init__(self):
         self.sessions = []
@@ -1056,6 +1056,18 @@ class MessageManager(object, metaclass=Singleton):
         session_manager = SessionManager()
         notification_center = NotificationCenter()
 
+        if content_type == 'application/sylk-message-remove':
+            payload = json.loads(body)
+            notification_center.post_notification('BlinkGotHistoryMessageRemove', data=payload['message_id'])
+
+            try:
+                blink_session = next(session for session in self.sessions if session.contact.settings is contact.settings)
+            except StopIteration:
+                pass
+            else:
+                notification_center.post_notification('BlinkMessageWillRemove', sender=blink_session, data=payload['message_id'])
+            return
+
         timestamp = cpim_message.timestamp if cpim_message is not None and cpim_message.timestamp is not None else ISOTimestamp.now()
         if timestamp.tzinfo is tzutc():
             timestamp = timestamp.replace(tzinfo=timezone.utc).astimezone(tzlocal())