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EDITING: pubsub.js

/*
 * Copyright (C) 2020 - present Instructure, Inc.
 *
 * This file is part of Canvas.
 *
 * Canvas is free software: you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by the Free
 * Software Foundation, version 3 of the License.
 *
 * Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Affero General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 */

// A simple pubsub engine for sending messages between Canvas components
import uuid from 'uuid'

export default class PubSub {
  topics = {}

subscribe(topic, fn) {
    if (!this.topics[topic]) this.topics[topic] = {}
    const id = uuid.v4()
    this.topics[topic][id] = fn
    return () => {
      this.topics[topic][id] = null
      delete this.topics[topic][id]
    }
  }

publish(topic, args) {
    if (!this.topics[topic]) return
    Object.values(this.topics[topic]).forEach(fn => {
      if (fn) fn(args)
    })
  }
}

CANCEL

Name	Type	Size	Modified	Actions
↩ ..	DIR	—	—
📁 __tests__/	DIR	—	2023-09-24 03:36
📄 index.js	JS	789 B	2023-09-24 03:36	EDIT
📄 package.json	JSON	121 B	2023-09-24 03:36	EDIT
📄 pubsub.js	JS	1.2 KB	2023-09-24 03:36	EDIT