Implement a batched presence_handler.get_state and use it

1 files changed, 63 insertions, 0 deletions

diff --git a/synapse/handlers/presence.py b/synapse/handlers/presence.py
index 341a516da2..33d76efe08 100644
--- a/synapse/handlers/presence.py
+++ b/synapse/handlers/presence.py
@@ -233,6 +233,69 @@ class PresenceHandler(BaseHandler):
             defer.returnValue(state)
 
     @defer.inlineCallbacks
+    def get_states(self, target_users, auth_user, as_event=False, check_auth=True):
+        try:
+            local_users, remote_users = partitionbool(
+                target_users,
+                lambda u: self.hs.is_mine(u)
+            )
+
+            if check_auth:
+                for u in local_users:
+                    visible = yield self.is_presence_visible(
+                        observer_user=auth_user,
+                        observed_user=u
+                    )
+
+                    if not visible:
+                        raise SynapseError(404, "Presence information not visible")
+
+            results = {}
+            if local_users:
+                for u in local_users:
+                    if u in self._user_cachemap:
+                        results[u] = self._user_cachemap[u].get_state()
+
+                local_to_user = {u.localpart: u for u in local_users}
+
+                states = yield self.store.get_presence_states(
+                    [u.localpart for u in local_users if u not in results]
+                )
+
+                for local_part, state in states.items():
+                    res = {"presence": state["state"]}
+                    if "status_msg" in state and state["status_msg"]:
+                        res["status_msg"] = state["status_msg"]
+                    results[local_to_user[local_part]] = res
+
+            for u in remote_users:
+                # TODO(paul): Have remote server send us permissions set
+                results[u] = self._get_or_offline_usercache(u).get_state()
+
+            for state in results.values():
+                if "last_active" in state:
+                    state["last_active_ago"] = int(
+                        self.clock.time_msec() - state.pop("last_active")
+                    )
+
+            if as_event:
+                for user, state in results.items():
+                    content = state
+                    content["user_id"] = user.to_string()
+
+                    if "last_active" in content:
+                        content["last_active_ago"] = int(
+                            self._clock.time_msec() - content.pop("last_active")
+                        )
+
+                    results[user] = {"type": "m.presence", "content": content}
+        except:
+            logger.exception(":(")
+            raise
+
+        defer.returnValue(results)
+
+    @defer.inlineCallbacks
     @log_function
     def set_state(self, target_user, auth_user, state):
         # return