dynatrace-cordova-outsystems-plugin/node_modules/ws/lib/event-target.js

This plugin gives you the ability to use the Dynatrace instrumentation in your hybrid application (Cordova, Ionic, ..). It uses the Mobile Agent, the JavaScript Agent and the Javascript Bridge. The Mobile Agent will give you all device specific values con

'use strict';

/**
 * Class representing an event.
 *
 * @private
 */
class Event {
  /**
   * Create a new `Event`.
   *
   * @param {String} type The name of the event
   * @param {Object} target A reference to the target to which the event was dispatched
   */
  constructor(type, target) {
    this.target = target;
    this.type = type;
  }
}

/**
 * Class representing a message event.
 *
 * @extends Event
 * @private
 */
class MessageEvent extends Event {
  /**
   * Create a new `MessageEvent`.
   *
   * @param {(String|Buffer|ArrayBuffer|Buffer[])} data The received data
   * @param {WebSocket} target A reference to the target to which the event was dispatched
   */
  constructor(data, target) {
    super('message', target);

    this.data = data;
  }
}

/**
 * Class representing a close event.
 *
 * @extends Event
 * @private
 */
class CloseEvent extends Event {
  /**
   * Create a new `CloseEvent`.
   *
   * @param {Number} code The status code explaining why the connection is being closed
   * @param {String} reason A human-readable string explaining why the connection is closing
   * @param {WebSocket} target A reference to the target to which the event was dispatched
   */
  constructor(code, reason, target) {
    super('close', target);

    this.wasClean = target._closeFrameReceived && target._closeFrameSent;
    this.reason = reason;
    this.code = code;
  }
}

/**
 * Class representing an open event.
 *
 * @extends Event
 * @private
 */
class OpenEvent extends Event {
  /**
   * Create a new `OpenEvent`.
   *
   * @param {WebSocket} target A reference to the target to which the event was dispatched
   */
  constructor(target) {
    super('open', target);
  }
}

/**
 * Class representing an error event.
 *
 * @extends Event
 * @private
 */
class ErrorEvent extends Event {
  /**
   * Create a new `ErrorEvent`.
   *
   * @param {Object} error The error that generated this event
   * @param {WebSocket} target A reference to the target to which the event was dispatched
   */
  constructor(error, target) {
    super('error', target);

    this.message = error.message;
    this.error = error;
  }
}

/**
 * This provides methods for emulating the `EventTarget` interface. It's not
 * meant to be used directly.
 *
 * @mixin
 */
const EventTarget = {
  /**
   * Register an event listener.
   *
   * @param {String} method A string representing the event type to listen for
   * @param {Function} listener The listener to add
   * @public
   */
  addEventListener(method, listener) {
    if (typeof listener !== 'function') return;

    function onMessage(data) {
      listener.call(this, new MessageEvent(data, this));
    }

    function onClose(code, message) {
      listener.call(this, new CloseEvent(code, message, this));
    }

    function onError(error) {
      listener.call(this, new ErrorEvent(error, this));
    }

    function onOpen() {
      listener.call(this, new OpenEvent(this));
    }

    if (method === 'message') {
      onMessage._listener = listener;
      this.on(method, onMessage);
    } else if (method === 'close') {
      onClose._listener = listener;
      this.on(method, onClose);
    } else if (method === 'error') {
      onError._listener = listener;
      this.on(method, onError);
    } else if (method === 'open') {
      onOpen._listener = listener;
      this.on(method, onOpen);
    } else {
      this.on(method, listener);
    }
  },

  /**
   * Remove an event listener.
   *
   * @param {String} method A string representing the event type to remove
   * @param {Function} listener The listener to remove
   * @public
   */
  removeEventListener(method, listener) {
    const listeners = this.listeners(method);

    for (var i = 0; i < listeners.length; i++) {
      if (listeners[i] === listener || listeners[i]._listener === listener) {
        this.removeListener(method, listeners[i]);
      }
    }
  }
};

module.exports = EventTarget;