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@@ -13,6 +13,7 @@
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# limitations under the License.
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from typing import Dict
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+from synapse.api.constants import EventTypes, Membership
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from synapse.events import EventBase
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from synapse.push.presentable_names import calculate_room_name, name_from_member_event
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from synapse.storage.controllers import StorageControllers
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@@ -49,7 +50,41 @@ async def get_badge_count(store: DataStore, user_id: str, group_by_room: bool) -
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async def get_context_for_event(
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storage: StorageControllers, ev: EventBase, user_id: str
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) -> Dict[str, str]:
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- ctx = {}
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+ ctx: Dict[str, str] = {}
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+
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+ if ev.internal_metadata.outlier:
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+ # We don't have state for outliers, so we can't compute the context
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+ # except for invites and knocks. (Such events are known as 'out-of-band
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+ # memberships' for the user).
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+ if ev.type != EventTypes.Member:
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+ return ctx
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+
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+ # We might be able to pull out the display name for the sender straight
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+ # from the membership event
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+ event_display_name = ev.content.get("displayname")
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+ if event_display_name and ev.state_key == ev.sender:
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+ ctx["sender_display_name"] = event_display_name
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+
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+ room_state = []
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+ if ev.content.get("membership") == Membership.INVITE:
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+ room_state = ev.unsigned.get("invite_room_state", [])
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+ elif ev.content.get("membership") == Membership.KNOCK:
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+ room_state = ev.unsigned.get("knock_room_state", [])
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+
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+ # Ideally we'd reuse the logic in `calculate_room_name`, but that gets
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+ # complicated to handle partial events vs pulling events from the DB.
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+ for state_dict in room_state:
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+ type_tuple = (state_dict["type"], state_dict.get("state_key"))
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+ if type_tuple == (EventTypes.Member, ev.sender):
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+ display_name = state_dict["content"].get("displayname")
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+ if display_name:
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+ ctx["sender_display_name"] = display_name
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+ elif type_tuple == (EventTypes.Name, ""):
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+ room_name = state_dict["content"].get("name")
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+ if room_name:
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+ ctx["name"] = room_name
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+
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+ return ctx
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room_state_ids = await storage.state.get_state_ids_for_event(ev.event_id)
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