65 lines
1.8 KiB
TypeScript
65 lines
1.8 KiB
TypeScript
/*
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* Copyright (C) 2023 - present Instructure, Inc.
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*
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* This file is part of Canvas.
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*
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* Canvas is free software: you can redistribute it and/or modify it under
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* the terms of the GNU Affero General Public License as published by the Free
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* Software Foundation, version 3 of the License.
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*
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* Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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* A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Affero General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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type EventType = 'message'
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type Callback = (event: {data: any}) => void
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let messageListeners: Callback[] = []
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export default class MockBroadcastChannel {
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private channel: string
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private listeners: Callback[]
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constructor(channel: string) {
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this.channel = channel
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this.listeners = []
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}
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postMessage(message: any): void {
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this.listeners.forEach(listener => listener({data: message}))
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}
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onmessage: Callback | null = null
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addEventListener(type: EventType, callback: Callback): void {
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if (type === 'message') {
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this.listeners.push(callback)
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messageListeners.push(callback)
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}
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}
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removeEventListener(type: EventType, callback: Callback): void {
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if (type === 'message') {
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this.listeners = this.listeners.filter(listener => listener !== callback)
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messageListeners = messageListeners.filter(listener => listener !== callback)
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}
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}
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close(): void {
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this.listeners.forEach(listener => {
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const index = messageListeners.indexOf(listener)
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if (index !== -1) {
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messageListeners.splice(index, 1)
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}
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})
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this.listeners = []
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}
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}
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