2 files changed, 52 insertions, 6 deletions
diff --git a/synapse/handlers/typing.py b/synapse/handlers/typing.py
index d88a53242c..912cfd708b 100644
--- a/synapse/handlers/typing.py
+++ b/synapse/handlers/typing.py
@@ -43,7 +43,8 @@ class TypingNotificationHandler(BaseHandler):
 
         self.federation.register_edu_handler("m.typing", self._recv_edu)
 
-        self._member_typing_until = {}
+        self._member_typing_until = {} # clock time we expect to stop
+        self._member_typing_timer = {} # deferreds to manage theabove
 
     @defer.inlineCallbacks
     def started_typing(self, target_user, auth_user, room_id, timeout):
@@ -58,7 +59,13 @@ class TypingNotificationHandler(BaseHandler):
 
         was_present = member in self._member_typing_until
 
+        if member in self._member_typing_timer:
+            self.clock.cancel_call_later(self._member_typing_timer[member])
+
         self._member_typing_until[member] = until
+        self._member_typing_timer[member] = self.clock.call_later(
+            timeout / 1000, lambda: self._stopped_typing(member)
+        )
 
         if was_present:
             # No point sending another notification
@@ -80,16 +87,25 @@ class TypingNotificationHandler(BaseHandler):
 
         member = RoomMember(room_id=room_id, user=target_user)
 
+        yield self._stopped_typing(member)
+
+    @defer.inlineCallbacks
+    def _stopped_typing(self, member):
         if member not in self._member_typing_until:
             # No point
             defer.returnValue(None)
 
         yield self._push_update(
-            room_id=room_id,
-            user=target_user,
+            room_id=member.room_id,
+            user=member.user,
             typing=False,
         )
 
+        del self._member_typing_until[member]
+
+        self.clock.cancel_call_later(self._member_typing_timer[member])
+        del self._member_typing_timer[member]
+
     @defer.inlineCallbacks
     def _push_update(self, room_id, user, typing):
         localusers = set()
diff --git a/tests/handlers/test_typing.py b/tests/handlers/test_typing.py
index 7e6ed9a42f..6b9e22d396 100644
--- a/tests/handlers/test_typing.py
+++ b/tests/handlers/test_typing.py
@@ -238,9 +238,11 @@ class TypingNotificationsTestCase(unittest.TestCase):
 
         # Gut-wrenching
         from synapse.handlers.typing import RoomMember
-        self.handler._member_typing_until[
-            RoomMember(self.room_id, self.u_apple)
-        ] = 1002000
+        member = RoomMember(self.room_id, self.u_apple)
+        self.handler._member_typing_until[member] = 1002000
+        self.handler._member_typing_timer[member] = (
+            self.clock.call_later(1002, lambda: 0)
+        )
 
         yield self.handler.stopped_typing(
             target_user=self.u_apple,
@@ -256,3 +258,31 @@ class TypingNotificationsTestCase(unittest.TestCase):
         ])
 
         yield put_json.await_calls()
+
+    @defer.inlineCallbacks
+    def test_typing_timeout(self):
+        self.room_members = [self.u_apple, self.u_banana]
+
+        yield self.handler.started_typing(
+            target_user=self.u_apple,
+            auth_user=self.u_apple,
+            room_id=self.room_id,
+            timeout=10000,
+        )
+
+        self.mock_update_client.assert_has_calls([
+            call(observer_user=self.u_banana,
+                observed_user=self.u_apple,
+                room_id=self.room_id,
+                typing=True),
+        ])
+        self.mock_update_client.reset_mock()
+
+        self.clock.advance_time(11)
+
+        self.mock_update_client.assert_has_calls([
+            call(observer_user=self.u_banana,
+                observed_user=self.u_apple,
+                room_id=self.room_id,
+                typing=False),
+        ])