90 lines
3.1 KiB
JavaScript
90 lines
3.1 KiB
JavaScript
/*
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Copyright 2020 Bruno Windels <bruno@windels.cloud>
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Copyright 2020 The Matrix.org Foundation C.I.C.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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import {RoomMember} from "./RoomMember.js";
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async function loadMembers({roomId, storage}) {
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const txn = await storage.readTxn([
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storage.storeNames.roomMembers,
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]);
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const memberDatas = await txn.roomMembers.getAll(roomId);
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return memberDatas.map(d => new RoomMember(d));
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}
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async function fetchMembers({summary, roomId, hsApi, storage, setChangedMembersMap}) {
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// if any members are changed by sync while we're fetching members,
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// they will end up here, so we check not to override them
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const changedMembersDuringSync = new Map();
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setChangedMembersMap(changedMembersDuringSync);
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const memberResponse = await hsApi.members(roomId, {at: summary.lastPaginationToken}).response();
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const txn = await storage.readWriteTxn([
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storage.storeNames.roomSummary,
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storage.storeNames.roomMembers,
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]);
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let summaryChanges;
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let members;
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try {
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summaryChanges = summary.writeHasFetchedMembers(true, txn);
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const {roomMembers} = txn;
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const memberEvents = memberResponse.chunk;
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if (!Array.isArray(memberEvents)) {
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throw new Error("malformed");
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}
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members = await Promise.all(memberEvents.map(async memberEvent => {
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const userId = memberEvent?.state_key;
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if (!userId) {
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throw new Error("malformed");
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}
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// this member was changed during a sync that happened while calling /members
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// and thus is more recent, so don't overwrite
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const changedMember = changedMembersDuringSync.get(userId);
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if (changedMember) {
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return changedMember;
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} else {
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const member = RoomMember.fromMemberEvent(roomId, memberEvent);
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if (member) {
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roomMembers.set(member.serialize());
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}
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return member;
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}
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}));
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} catch (err) {
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// abort txn on any error
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txn.abort();
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throw err;
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} finally {
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// important this gets cleared
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// or otherwise Room remains in "fetching-members" mode
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setChangedMembersMap(null);
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}
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await txn.complete();
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summary.applyChanges(summaryChanges);
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return members;
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}
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export async function fetchOrLoadMembers(options) {
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const {summary} = options;
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if (!summary.hasFetchedMembers) {
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return fetchMembers(options);
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} else {
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return loadMembers(options);
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}
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}
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