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87fe9db467
Since MSC3715 has passed FCP, the stable parameter can be used. This currently falls back to the unstable parameter if the stable parameter is not provided (and MSC3715 support is enabled in the configuration).
102 lines
3.5 KiB
Python
102 lines
3.5 KiB
Python
# Copyright 2019 New Vector Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import logging
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from typing import TYPE_CHECKING, Optional, Tuple
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from synapse.http.server import HttpServer
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from synapse.http.servlet import RestServlet, parse_integer, parse_string
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from synapse.http.site import SynapseRequest
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from synapse.rest.client._base import client_patterns
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from synapse.types import JsonDict, StreamToken
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if TYPE_CHECKING:
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from synapse.server import HomeServer
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logger = logging.getLogger(__name__)
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class RelationPaginationServlet(RestServlet):
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"""API to paginate relations on an event by topological ordering, optionally
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filtered by relation type and event type.
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"""
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PATTERNS = client_patterns(
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"/rooms/(?P<room_id>[^/]*)/relations/(?P<parent_id>[^/]*)"
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"(/(?P<relation_type>[^/]*)(/(?P<event_type>[^/]*))?)?$",
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releases=("v1",),
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)
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def __init__(self, hs: "HomeServer"):
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super().__init__()
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self.auth = hs.get_auth()
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self.store = hs.get_datastores().main
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self._relations_handler = hs.get_relations_handler()
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self._msc3715_enabled = hs.config.experimental.msc3715_enabled
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async def on_GET(
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self,
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request: SynapseRequest,
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room_id: str,
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parent_id: str,
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relation_type: Optional[str] = None,
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event_type: Optional[str] = None,
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) -> Tuple[int, JsonDict]:
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requester = await self.auth.get_user_by_req(request, allow_guest=True)
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limit = parse_integer(request, "limit", default=5)
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# Fetch the direction parameter, if provided.
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#
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# TODO Use PaginationConfig.from_request when the unstable parameter is
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# no longer needed.
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direction = parse_string(request, "dir", allowed_values=["f", "b"])
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if direction is None:
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if self._msc3715_enabled:
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direction = parse_string(
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request,
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"org.matrix.msc3715.dir",
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default="b",
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allowed_values=["f", "b"],
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)
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else:
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direction = "b"
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from_token_str = parse_string(request, "from")
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to_token_str = parse_string(request, "to")
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# Return the relations
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from_token = None
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if from_token_str:
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from_token = await StreamToken.from_string(self.store, from_token_str)
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to_token = None
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if to_token_str:
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to_token = await StreamToken.from_string(self.store, to_token_str)
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result = await self._relations_handler.get_relations(
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requester=requester,
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event_id=parent_id,
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room_id=room_id,
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relation_type=relation_type,
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event_type=event_type,
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limit=limit,
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direction=direction,
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from_token=from_token,
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to_token=to_token,
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)
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return 200, result
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def register_servlets(hs: "HomeServer", http_server: HttpServer) -> None:
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RelationPaginationServlet(hs).register(http_server)
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