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: / var / canvas / node_modules / karma / lib /

Filename : emitter_wrapper.js

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'use strict'

class EmitterWrapper {
  constructor (emitter) {
    this.listeners = {}
    this.emitter = emitter
  }

  addListener (event, listener) {
    this.emitter.addListener(event, listener)
    this.listeners[event] = this.listeners[event] || []
    this.listeners[event].push(listener)
    return this
  }

  on (event, listener) {
    return this.addListener(event, listener)
  }

  removeAllListeners (event) {
    const events = event ? [event] : Object.keys(this.listeners)
    events.forEach((event) => {
      this.listeners[event].forEach((listener) => {
        this.emitter.removeListener(event, listener)
      })
      delete this.listeners[event]
    })

    return this
  }
}

module.exports = EmitterWrapper