88 lines
3 KiB
TypeScript
88 lines
3 KiB
TypeScript
/*
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Copyright 2020 Bruno Windels <bruno@windels.cloud>
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Copyright 2020, 2021 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 {MAX_UNICODE} from "./common";
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import {Store} from "../Store";
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function encodeKey(roomId: string, userId: string) {
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return `${roomId}|${userId}`;
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}
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function decodeKey(key: string): { roomId: string, userId: string } {
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const [roomId, userId] = key.split("|");
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return {roomId, userId};
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}
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// TODO: Move to RoomMember when that's TypeScript.
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export interface MemberData {
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roomId: string;
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userId: string;
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avatarUrl: string;
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displayName: string;
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membership: "join" | "leave" | "invite" | "ban";
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}
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type MemberStorageEntry = MemberData & { key: string }
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// no historical members
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export class RoomMemberStore {
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private _roomMembersStore: Store<MemberStorageEntry>;
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constructor(roomMembersStore: Store<MemberStorageEntry>) {
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this._roomMembersStore = roomMembersStore;
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}
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get(roomId: string, userId: string): Promise<MemberStorageEntry | undefined> {
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return this._roomMembersStore.get(encodeKey(roomId, userId));
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}
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set(member: MemberData): void {
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// Object.assign would be more typesafe, but small objects
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(member as MemberStorageEntry).key = encodeKey(member.roomId, member.userId);
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this._roomMembersStore.put(member as MemberStorageEntry);
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}
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getAll(roomId: string): Promise<MemberData[]> {
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const range = this._roomMembersStore.IDBKeyRange.lowerBound(encodeKey(roomId, ""));
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return this._roomMembersStore.selectWhile(range, member => {
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return member.roomId === roomId;
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});
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}
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async getAllUserIds(roomId: string): Promise<string[]> {
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const userIds: string[] = [];
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const range = this._roomMembersStore.IDBKeyRange.lowerBound(encodeKey(roomId, ""));
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await this._roomMembersStore.iterateKeys(range, key => {
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const decodedKey = decodeKey(key as string);
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// prevent running into the next room
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if (decodedKey.roomId === roomId) {
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userIds.push(decodedKey.userId);
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return false; // fetch more
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}
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return true; // done
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});
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return userIds;
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}
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removeAllForRoom(roomId: string): void {
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// exclude both keys as they are theoretical min and max,
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// but we should't have a match for just the room id, or room id with max
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const range = this._roomMembersStore.IDBKeyRange.bound(roomId, `${roomId}|${MAX_UNICODE}`, true, true);
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this._roomMembersStore.delete(range);
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}
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}
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