diff options
Diffstat (limited to 'synapse/handlers/appservice.py')
| -rw-r--r-- | synapse/handlers/appservice.py | 148 |
1 files changed, 142 insertions, 6 deletions
diff --git a/synapse/handlers/appservice.py b/synapse/handlers/appservice.py index bd913e524e..316c4b677c 100644 --- a/synapse/handlers/appservice.py +++ b/synapse/handlers/appservice.py @@ -33,7 +33,13 @@ from synapse.metrics.background_process_metrics import ( wrap_as_background_process, ) from synapse.storage.databases.main.directory import RoomAliasMapping -from synapse.types import JsonDict, RoomAlias, RoomStreamToken, UserID +from synapse.types import ( + DeviceListUpdates, + JsonDict, + RoomAlias, + RoomStreamToken, + UserID, +) from synapse.util.async_helpers import Linearizer from synapse.util.metrics import Measure @@ -58,6 +64,9 @@ class ApplicationServicesHandler: self._msc2409_to_device_messages_enabled = ( hs.config.experimental.msc2409_to_device_messages_enabled ) + self._msc3202_transaction_extensions_enabled = ( + hs.config.experimental.msc3202_transaction_extensions + ) self.current_max = 0 self.is_processing = False @@ -204,9 +213,9 @@ class ApplicationServicesHandler: Args: stream_key: The stream the event came from. - `stream_key` can be "typing_key", "receipt_key", "presence_key" or - "to_device_key". Any other value for `stream_key` will cause this function - to return early. + `stream_key` can be "typing_key", "receipt_key", "presence_key", + "to_device_key" or "device_list_key". Any other value for `stream_key` + will cause this function to return early. Ephemeral events will only be pushed to appservices that have opted into receiving them by setting `push_ephemeral` to true in their registration @@ -230,6 +239,7 @@ class ApplicationServicesHandler: "receipt_key", "presence_key", "to_device_key", + "device_list_key", ): return @@ -253,15 +263,37 @@ class ApplicationServicesHandler: ): return + # Ignore device lists if the feature flag is not enabled + if ( + stream_key == "device_list_key" + and not self._msc3202_transaction_extensions_enabled + ): + return + # Check whether there are any appservices which have registered to receive # ephemeral events. # # Note that whether these events are actually relevant to these appservices # is decided later on. + services = self.store.get_app_services() services = [ service - for service in self.store.get_app_services() - if service.supports_ephemeral + for service in services + # Different stream keys require different support booleans + if ( + stream_key + in ( + "typing_key", + "receipt_key", + "presence_key", + "to_device_key", + ) + and service.supports_ephemeral + ) + or ( + stream_key == "device_list_key" + and service.msc3202_transaction_extensions + ) ] if not services: # Bail out early if none of the target appservices have explicitly registered @@ -336,6 +368,20 @@ class ApplicationServicesHandler: service, "to_device", new_token ) + elif stream_key == "device_list_key": + device_list_summary = await self._get_device_list_summary( + service, new_token + ) + if device_list_summary: + self.scheduler.enqueue_for_appservice( + service, device_list_summary=device_list_summary + ) + + # Persist the latest handled stream token for this appservice + await self.store.set_appservice_stream_type_pos( + service, "device_list", new_token + ) + async def _handle_typing( self, service: ApplicationService, new_token: int ) -> List[JsonDict]: @@ -542,6 +588,96 @@ class ApplicationServicesHandler: return message_payload + async def _get_device_list_summary( + self, + appservice: ApplicationService, + new_key: int, + ) -> DeviceListUpdates: + """ + Retrieve a list of users who have changed their device lists. + + Args: + appservice: The application service to retrieve device list changes for. + new_key: The stream key of the device list change that triggered this method call. + + Returns: + A set of device list updates, comprised of users that the appservices needs to: + * resync the device list of, and + * stop tracking the device list of. + """ + # Fetch the last successfully processed device list update stream ID + # for this appservice. + from_key = await self.store.get_type_stream_id_for_appservice( + appservice, "device_list" + ) + + # Fetch the users who have modified their device list since then. + users_with_changed_device_lists = ( + await self.store.get_users_whose_devices_changed(from_key, to_key=new_key) + ) + + # Filter out any users the application service is not interested in + # + # For each user who changed their device list, we want to check whether this + # appservice would be interested in the change. + filtered_users_with_changed_device_lists = { + user_id + for user_id in users_with_changed_device_lists + if await self._is_appservice_interested_in_device_lists_of_user( + appservice, user_id + ) + } + + # Create a summary of "changed" and "left" users. + # TODO: Calculate "left" users. + device_list_summary = DeviceListUpdates( + changed=filtered_users_with_changed_device_lists + ) + + return device_list_summary + + async def _is_appservice_interested_in_device_lists_of_user( + self, + appservice: ApplicationService, + user_id: str, + ) -> bool: + """ + Returns whether a given application service is interested in the device list + updates of a given user. + + The application service is interested in the user's device list updates if any + of the following are true: + * The user is the appservice's sender localpart user. + * The user is in the appservice's user namespace. + * At least one member of one room that the user is a part of is in the + appservice's user namespace. + * The appservice is explicitly (via room ID or alias) interested in at + least one room that the user is in. + + Args: + appservice: The application service to gauge interest of. + user_id: The ID of the user whose device list interest is in question. + + Returns: + True if the application service is interested in the user's device lists, False + otherwise. + """ + # This method checks against both the sender localpart user as well as if the + # user is in the appservice's user namespace. + if appservice.is_interested_in_user(user_id): + return True + + # Determine whether any of the rooms the user is in justifies sending this + # device list update to the application service. + room_ids = await self.store.get_rooms_for_user(user_id) + for room_id in room_ids: + # This method covers checking room members for appservice interest as well as + # room ID and alias checks. + if await appservice.is_interested_in_room(room_id, self.store): + return True + + return False + async def query_user_exists(self, user_id: str) -> bool: """Check if any application service knows this user_id exists. |