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Refactors in _generate_sync_entry_for_rooms (#11515)
* Move sync_token up to the top * Pull out _get_ignored_users * Try to signpost the body of `_generate_sync_entry_for_rooms` * Pull out _calculate_user_changes Co-authored-by: Patrick Cloke <clokep@users.noreply.github.com>
This commit is contained in:
David Robertson
GitHub
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14d593f72d
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Add comments to various parts of the `/sync` handler.
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Refactor various parts of the `/sync` handler.
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1
changelog.d/11515.misc
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1
changelog.d/11515.misc
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Refactor various parts of the `/sync` handler.
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@ -1506,16 +1506,22 @@ class SyncHandler:
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account_data_by_room: Dictionary of per room account data
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Returns:
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Returns a 4-tuple whose entries are:
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Returns a 4-tuple describing rooms the user has joined or left, and users who've
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joined or left rooms any rooms the user is in. This gets used later in
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`_generate_sync_entry_for_device_list`.
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Its entries are:
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- newly_joined_rooms
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- newly_joined_or_invited_or_knocked_users
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- newly_left_rooms
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- newly_left_users
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"""
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# Start by fetching all ephemeral events in rooms we've joined (if required).
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since_token = sync_result_builder.since_token
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# 1. Start by fetching all ephemeral events in rooms we've joined (if required).
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user_id = sync_result_builder.sync_config.user.to_string()
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block_all_room_ephemeral = (
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sync_result_builder.since_token is None
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since_token is None
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and sync_result_builder.sync_config.filter_collection.blocks_all_room_ephemeral()
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)
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@ -1529,9 +1535,8 @@ class SyncHandler:
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)
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sync_result_builder.now_token = now_token
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# We check up front if anything has changed, if it hasn't then there is
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# 2. We check up front if anything has changed, if it hasn't then there is
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# no point in going further.
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since_token = sync_result_builder.since_token
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if not sync_result_builder.full_state:
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if since_token and not ephemeral_by_room and not account_data_by_room:
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have_changed = await self._have_rooms_changed(sync_result_builder)
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@ -1544,20 +1549,8 @@ class SyncHandler:
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logger.debug("no-oping sync")
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return set(), set(), set(), set()
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ignored_account_data = (
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await self.store.get_global_account_data_by_type_for_user(
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AccountDataTypes.IGNORED_USER_LIST, user_id=user_id
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)
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)
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# If there is ignored users account data and it matches the proper type,
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# then use it.
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ignored_users: FrozenSet[str] = frozenset()
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if ignored_account_data:
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ignored_users_data = ignored_account_data.get("ignored_users", {})
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if isinstance(ignored_users_data, dict):
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ignored_users = frozenset(ignored_users_data.keys())
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# 3. Work out which rooms need reporting in the sync response.
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ignored_users = await self._get_ignored_users(user_id)
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if since_token:
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room_changes = await self._get_rooms_changed(
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sync_result_builder, ignored_users
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@ -1567,7 +1560,6 @@ class SyncHandler:
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)
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else:
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room_changes = await self._get_all_rooms(sync_result_builder, ignored_users)
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tags_by_room = await self.store.get_tags_for_user(user_id)
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log_kv({"rooms_changed": len(room_changes.room_entries)})
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@ -1578,6 +1570,8 @@ class SyncHandler:
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newly_joined_rooms = room_changes.newly_joined_rooms
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newly_left_rooms = room_changes.newly_left_rooms
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# 4. We need to apply further processing to `room_entries` (rooms considered
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# joined or archived).
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async def handle_room_entries(room_entry: "RoomSyncResultBuilder") -> None:
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logger.debug("Generating room entry for %s", room_entry.room_id)
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await self._generate_room_entry(
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@ -1596,31 +1590,13 @@ class SyncHandler:
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sync_result_builder.invited.extend(invited)
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sync_result_builder.knocked.extend(knocked)
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# Now we want to get any newly joined, invited or knocking users
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newly_joined_or_invited_or_knocked_users = set()
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newly_left_users = set()
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if since_token:
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for joined_sync in sync_result_builder.joined:
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it = itertools.chain(
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joined_sync.timeline.events, joined_sync.state.values()
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)
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for event in it:
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if event.type == EventTypes.Member:
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if (
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event.membership == Membership.JOIN
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or event.membership == Membership.INVITE
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or event.membership == Membership.KNOCK
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):
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newly_joined_or_invited_or_knocked_users.add(
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event.state_key
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)
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else:
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prev_content = event.unsigned.get("prev_content", {})
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prev_membership = prev_content.get("membership", None)
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if prev_membership == Membership.JOIN:
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newly_left_users.add(event.state_key)
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newly_left_users -= newly_joined_or_invited_or_knocked_users
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# 5. Work out which users have joined or left rooms we're in. We use this
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# to build the device_list part of the sync response in
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# `_generate_sync_entry_for_device_list`.
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(
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newly_joined_or_invited_or_knocked_users,
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newly_left_users,
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) = sync_result_builder.calculate_user_changes()
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return (
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set(newly_joined_rooms),
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@ -1629,6 +1605,29 @@ class SyncHandler:
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newly_left_users,
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)
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async def _get_ignored_users(self, user_id: str) -> FrozenSet[str]:
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"""Retrieve the users ignored by the given user from their global account_data.
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Returns an empty set if
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- there is no global account_data entry for ignored_users
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- there is such an entry, but it's not a JSON object.
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"""
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# TODO: Can we `SELECT ignored_user_id FROM ignored_users WHERE ignorer_user_id=?;` instead?
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ignored_account_data = (
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await self.store.get_global_account_data_by_type_for_user(
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AccountDataTypes.IGNORED_USER_LIST, user_id=user_id
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)
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)
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# If there is ignored users account data and it matches the proper type,
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# then use it.
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ignored_users: FrozenSet[str] = frozenset()
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if ignored_account_data:
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ignored_users_data = ignored_account_data.get("ignored_users", {})
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if isinstance(ignored_users_data, dict):
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ignored_users = frozenset(ignored_users_data.keys())
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return ignored_users
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async def _have_rooms_changed(
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self, sync_result_builder: "SyncResultBuilder"
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) -> bool:
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@ -2341,6 +2340,39 @@ class SyncResultBuilder:
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groups: Optional[GroupsSyncResult] = None
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to_device: List[JsonDict] = attr.Factory(list)
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def calculate_user_changes(self) -> Tuple[Set[str], Set[str]]:
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"""Work out which other users have joined or left rooms we are joined to.
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This data only is only useful for an incremental sync.
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The SyncResultBuilder is not modified by this function.
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"""
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newly_joined_or_invited_or_knocked_users = set()
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newly_left_users = set()
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if self.since_token:
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for joined_sync in self.joined:
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it = itertools.chain(
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joined_sync.timeline.events, joined_sync.state.values()
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)
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for event in it:
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if event.type == EventTypes.Member:
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if (
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event.membership == Membership.JOIN
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or event.membership == Membership.INVITE
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or event.membership == Membership.KNOCK
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):
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newly_joined_or_invited_or_knocked_users.add(
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event.state_key
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)
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else:
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prev_content = event.unsigned.get("prev_content", {})
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prev_membership = prev_content.get("membership", None)
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if prev_membership == Membership.JOIN:
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newly_left_users.add(event.state_key)
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newly_left_users -= newly_joined_or_invited_or_knocked_users
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return newly_joined_or_invited_or_knocked_users, newly_left_users
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@attr.s(slots=True, auto_attribs=True)
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class RoomSyncResultBuilder:
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