Travis Ralston
1b47999e80
Fixes https://github.com/vector-im/riot-web/issues/9421 This also adds a context to the ReEmitter so we have access to the Room at the time of read receipt. Without this, we have to bind handlers to every encrypted room (which is tedious to maintain) or figure out which room `$something` belong to (CPU intensive).
53 lines
1.6 KiB
JavaScript
53 lines
1.6 KiB
JavaScript
/*
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Copyright 2015, 2016 OpenMarket Ltd
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Copyright 2017 Vector Creations Ltd
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Copyright 2017 New Vector Ltd
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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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/**
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* @module
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*/
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export default class Reemitter {
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constructor(target) {
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this.target = target;
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// We keep one bound event handler for each event name so we know
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// what event is arriving
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this.boundHandlers = {};
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}
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_handleEvent(eventName, ...args) {
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this.target.emit(eventName, ...args);
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}
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reEmit(source, eventNames) {
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// We include the source as the last argument for event handlers which may need it,
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// such as read receipt listeners on the client class which won't have the context
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// of the room.
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const forSource = (handler, ...args) => {
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handler(...args, source);
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};
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for (const eventName of eventNames) {
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if (this.boundHandlers[eventName] === undefined) {
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this.boundHandlers[eventName] = this._handleEvent.bind(this, eventName);
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}
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const boundHandler = forSource.bind(this, this.boundHandlers[eventName]);
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source.on(eventName, boundHandler);
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}
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}
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}
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