Support filtering events.Raw by update type

telethon/events/raw.py

@@ -0,0 +1,30 @@
+from .common import EventBuilder
+from .. import utils
+
+
+class Raw(EventBuilder):
+    """
+    Represents a raw event. The event is the update itself.
+
+    Args:
+        types (`list` | `tuple` | `type`, optional):
+            The type or types that the :tl:`Update` instance must be.
+            Equivalent to ``if not isinstance(update, types): return``.
+    """
+    def __init__(self, types=None):
+        super().__init__()
+        if not types:
+            self.types = None
+        elif not utils.is_list_like(types):
+            assert isinstance(types, type)
+            self.types = types
+        else:
+            assert all(isinstance(x, type) for x in types)
+            self.types = tuple(types)
+
+    def resolve(self, client):
+        pass
+
+    def build(self, update):
+        if not self.types or isinstance(update, self.types):
+            return update