Current File : //lib/node_modules/pm2/node_modules/ws/lib/event-target.js
'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} type A string representing the event type to listen for
* @param {Function} listener The listener to add
* @param {Object} [options] An options object specifies characteristics about
* the event listener
* @param {Boolean} [options.once=false] A `Boolean`` indicating that the
* listener should be invoked at most once after being added. If `true`,
* the listener would be automatically removed when invoked.
* @public
*/
addEventListener(type, listener, options) {
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));
}
const method = options && options.once ? 'once' : 'on';
if (type === 'message') {
onMessage._listener = listener;
this[method](type, onMessage);
} else if (type === 'close') {
onClose._listener = listener;
this[method](type, onClose);
} else if (type === 'error') {
onError._listener = listener;
this[method](type, onError);
} else if (type === 'open') {
onOpen._listener = listener;
this[method](type, onOpen);
} else {
this[method](type, listener);
}
},
/**
* Remove an event listener.
*
* @param {String} type A string representing the event type to remove
* @param {Function} listener The listener to remove
* @public
*/
removeEventListener(type, listener) {
const listeners = this.listeners(type);
for (let i = 0; i < listeners.length; i++) {
if (listeners[i] === listener || listeners[i]._listener === listener) {
this.removeListener(type, listeners[i]);
}
}
}
};
module.exports = EventTarget;
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