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Create setHasDiff helper and use it 

The usage here is identical to how it'll work in Spaces
pull/21833/head
Michael Telatynski 2021-02-19 12:58:23 +00:00
parent 02ae1e954b
commit 63d95706e9
2 changed files with 41 additions and 8 deletions
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15
src/stores/room-list/filters/CommunityFilterCondition.ts
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@ -19,17 +19,17 @@ import { FILTER_CHANGED, FilterPriority, IFilterCondition } from "./IFilterCondi
import { Group } from "matrix-js-sdk/src/models/group";
import { EventEmitter } from "events";
import GroupStore from "../../GroupStore";
import { arrayHasDiff } from "../../../utils/arrays";
import { IDestroyable } from "../../../utils/IDestroyable";
import DMRoomMap from "../../../utils/DMRoomMap";
import { setHasDiff } from "../../../utils/sets";
/**
* A filter condition for the room list which reveals rooms which
* are a member of a given community.
*/
export class CommunityFilterCondition extends EventEmitter implements IFilterCondition, IDestroyable {
private roomIds: string[] = [];
private userIds: string[] = [];
private roomIds = new Set<string>();
private userIds = new Set<string>();
constructor(private community: Group) {
super();
@ -45,19 +45,18 @@ export class CommunityFilterCondition extends EventEmitter implements IFilterCon
}
public isVisible(room: Room): boolean {
return this.roomIds.includes(room.roomId) ||
this.userIds.includes(DMRoomMap.shared().getUserIdForRoomId(room.roomId));
return this.roomIds.has(room.roomId) || this.userIds.has(DMRoomMap.shared().getUserIdForRoomId(room.roomId));
}
private onStoreUpdate = async (): Promise<any> => {
// We don't actually know if the room list changed for the community, so just check it again.
const beforeRoomIds = this.roomIds;
this.roomIds = (await GroupStore.getGroupRooms(this.community.groupId)).map(r => r.roomId);
this.roomIds = new Set((await GroupStore.getGroupRooms(this.community.groupId)).map(r => r.roomId));
const beforeUserIds = this.userIds;
this.userIds = (await GroupStore.getGroupMembers(this.community.groupId)).map(u => u.userId);
this.userIds = new Set((await GroupStore.getGroupMembers(this.community.groupId)).map(u => u.userId));
if (arrayHasDiff(beforeRoomIds, this.roomIds) || arrayHasDiff(beforeUserIds, this.userIds)) {
if (setHasDiff(beforeRoomIds, this.roomIds) || setHasDiff(beforeUserIds, this.userIds)) {
this.emit(FILTER_CHANGED);
}
};

34
src/utils/sets.ts Normal file
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@ -0,0 +1,34 @@
/*
Copyright 2021 The Matrix.org Foundation C.I.C.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/**
* Determines if two sets are different through a shallow comparison.
* @param a The first set. Must be defined.
* @param b The second set. Must be defined.
* @returns True if they are different, false otherwise.
*/
export function setHasDiff<T>(a: Set<T>, b: Set<T>): boolean {
if (a.size === b.size) {
// When the lengths are equal, check to see if either set is missing an element from the other.
if (Array.from(b).some(i => !a.has(i))) return true;
if (Array.from(a).some(i => !b.has(i))) return true;
// if all the keys are common, say so
return false;
} else {
return true; // different lengths means they are naturally diverged
}
}