From c3b037795a927ecf58fd3ab099c2a751f05de4d5 Mon Sep 17 00:00:00 2001 From: Šimon Brandner Date: Wed, 28 Jul 2021 10:05:11 +0200 Subject: Support for MSC2285 (hidden read receipts) (#10413) Implementation of matrix-org/matrix-doc#2285 --- synapse/handlers/initial_sync.py | 7 ++++- synapse/handlers/receipts.py | 58 ++++++++++++++++++++++++++++++++++++---- 2 files changed, 59 insertions(+), 6 deletions(-) (limited to 'synapse/handlers') diff --git a/synapse/handlers/initial_sync.py b/synapse/handlers/initial_sync.py index 5d49640760..e1c544a3c9 100644 --- a/synapse/handlers/initial_sync.py +++ b/synapse/handlers/initial_sync.py @@ -21,6 +21,7 @@ from synapse.api.constants import EduTypes, EventTypes, Membership from synapse.api.errors import SynapseError from synapse.events.validator import EventValidator from synapse.handlers.presence import format_user_presence_state +from synapse.handlers.receipts import ReceiptEventSource from synapse.logging.context import make_deferred_yieldable, run_in_background from synapse.storage.roommember import RoomsForUser from synapse.streams.config import PaginationConfig @@ -134,6 +135,8 @@ class InitialSyncHandler(BaseHandler): joined_rooms, to_key=int(now_token.receipt_key), ) + if self.hs.config.experimental.msc2285_enabled: + receipt = ReceiptEventSource.filter_out_hidden(receipt, user_id) tags_by_room = await self.store.get_tags_for_user(user_id) @@ -430,7 +433,9 @@ class InitialSyncHandler(BaseHandler): room_id, to_key=now_token.receipt_key ) if not receipts: - receipts = [] + return [] + if self.hs.config.experimental.msc2285_enabled: + receipts = ReceiptEventSource.filter_out_hidden(receipts, user_id) return receipts presence, receipts, (messages, token) = await make_deferred_yieldable( diff --git a/synapse/handlers/receipts.py b/synapse/handlers/receipts.py index 283483fc2c..b9085bbccb 100644 --- a/synapse/handlers/receipts.py +++ b/synapse/handlers/receipts.py @@ -14,9 +14,10 @@ import logging from typing import TYPE_CHECKING, List, Optional, Tuple +from synapse.api.constants import ReadReceiptEventFields from synapse.appservice import ApplicationService from synapse.handlers._base import BaseHandler -from synapse.types import JsonDict, ReadReceipt, get_domain_from_id +from synapse.types import JsonDict, ReadReceipt, UserID, get_domain_from_id if TYPE_CHECKING: from synapse.server import HomeServer @@ -137,7 +138,7 @@ class ReceiptsHandler(BaseHandler): return True async def received_client_receipt( - self, room_id: str, receipt_type: str, user_id: str, event_id: str + self, room_id: str, receipt_type: str, user_id: str, event_id: str, hidden: bool ) -> None: """Called when a client tells us a local user has read up to the given event_id in the room. @@ -147,23 +148,67 @@ class ReceiptsHandler(BaseHandler): receipt_type=receipt_type, user_id=user_id, event_ids=[event_id], - data={"ts": int(self.clock.time_msec())}, + data={"ts": int(self.clock.time_msec()), "hidden": hidden}, ) is_new = await self._handle_new_receipts([receipt]) if not is_new: return - if self.federation_sender: + if self.federation_sender and not ( + self.hs.config.experimental.msc2285_enabled and hidden + ): await self.federation_sender.send_read_receipt(receipt) class ReceiptEventSource: def __init__(self, hs: "HomeServer"): self.store = hs.get_datastore() + self.config = hs.config + + @staticmethod + def filter_out_hidden(events: List[JsonDict], user_id: str) -> List[JsonDict]: + visible_events = [] + + # filter out hidden receipts the user shouldn't see + for event in events: + content = event.get("content", {}) + new_event = event.copy() + new_event["content"] = {} + + for event_id in content.keys(): + event_content = content.get(event_id, {}) + m_read = event_content.get("m.read", {}) + + # If m_read is missing copy over the original event_content as there is nothing to process here + if not m_read: + new_event["content"][event_id] = event_content.copy() + continue + + new_users = {} + for rr_user_id, user_rr in m_read.items(): + hidden = user_rr.get("hidden", None) + if hidden is not True or rr_user_id == user_id: + new_users[rr_user_id] = user_rr.copy() + # If hidden has a value replace hidden with the correct prefixed key + if hidden is not None: + new_users[rr_user_id].pop("hidden") + new_users[rr_user_id][ + ReadReceiptEventFields.MSC2285_HIDDEN + ] = hidden + + # Set new users unless empty + if len(new_users.keys()) > 0: + new_event["content"][event_id] = {"m.read": new_users} + + # Append new_event to visible_events unless empty + if len(new_event["content"].keys()) > 0: + visible_events.append(new_event) + + return visible_events async def get_new_events( - self, from_key: int, room_ids: List[str], **kwargs + self, from_key: int, room_ids: List[str], user: UserID, **kwargs ) -> Tuple[List[JsonDict], int]: from_key = int(from_key) to_key = self.get_current_key() @@ -175,6 +220,9 @@ class ReceiptEventSource: room_ids, from_key=from_key, to_key=to_key ) + if self.config.experimental.msc2285_enabled: + events = ReceiptEventSource.filter_out_hidden(events, user.to_string()) + return (events, to_key) async def get_new_events_as( -- cgit 1.4.1