Add some missing filters

telethon/_events/filters/messages.py

@@ -2,6 +2,24 @@ import re
 from .base import Filter
 
 
+class Incoming:
+    """
+    The update must be something the client received from another user,
+    and not something the current user sent.
+    """
+    def __call__(self, event):
+        return not event.out
+
+
+class Outgoing:
+    """
+    The update must be something the current user sent,
+    and not something received from another user.
+    """
+    def __call__(self, event):
+        return event.out
+
+
 class Pattern:
     """
     The update type must match the specified instances for the filter to return `True`.