'use strict';
/**
* @author schukai GmbH
*/
import {Monster} from '../namespace.js';
import {Base} from './base.js';
/**
* With the help of the ObserverList class, observer can be managed.
*
* you can call the method via the monster namespace `new Monster.Types.ObserverList()`.
*
* ```
* <script type="module">
* import {Monster} from 'https://cdn.jsdelivr.net/npm/@schukai/monster@1.5.0/dist/modules/types/observerlist.js';
* console.log(new Monster.Types.ObserverList())
* console.log(new Monster.Types.ObserverList())
* </script>
* ```
*
* Alternatively, you can also integrate this function individually.
*
* ```
* <script type="module">
* import {ObserverList} from 'https://cdn.jsdelivr.net/npm/@schukai/monster@1.5.0/dist/modules/types/observerlist.js';
* console.log(ObserverList())
* console.log(ObserverList())
* </script>
* ```
*
* @since 1.0.0
* @copyright schukai GmbH
* @memberOf Monster/Types
*/
class ObserverList extends Base {
constructor() {
super();
this.observers = [];
}
attach(observer) {
checkIsObserver(observer);
this.observers.push(observer);
return this;
};
detach(observer) {
checkIsObserver(observer);
var i = 0, l = this.observers.length;
for (; i < l; i++) {
if (this.observers[i] === observer) {
this.observers.splice(i, 1);
}
}
return this;
};
contains(observer) {
checkIsObserver(observer);
var i = 0, l = this.observers.length;
for (; i < l; i++) {
if (this.observers[i] === observer) {
return true;
}
}
return false;
};
notify(subject) {
let pomises = []
var i = 0, l = this.observers.length;
for (; i < l; i++) {
pomises.push(this.observers[i].update(subject));
}
return Promise.all(pomises);
};
}
/**
*
* @param {Monster.Types.Observer} observer
* @returns {boolean}
* @private
*/
function checkIsObserver(observer) {
if (!(observer instanceof Monster.Types.Observer)) {
throw new Error("argument must be instance of observer")
}
return true;
}
Monster.assignToNamespace('Monster.Types', ObserverList);
export {Monster, ObserverList}