import {Monster, Queue} from "./queue.js";
import {validateObject} from "./validate.js";
/**
* you can call the method via the monster namespace `new Monster.Types.Queue()`.
*
* ```
* <script type="module">
* import {Monster} from 'https://cdn.jsdelivr.net/npm/@schukai/monster@1.6.0/dist/modules/types/uniquequeue.js';
* console.log(new Monster.Types.UniqueQueue())
* </script>
* ```
*
* Alternatively, you can also integrate this function individually.
*
* ```
* <script type="module">
* import {ID} from 'https://cdn.jsdelivr.net/npm/@schukai/monster@1.6.0/dist/modules/types/uniquequeue.js';
* console.log(new UniqueQueue())
* </script>
* ```
*
* @since 1.4.0
* @copyright schukai GmbH
* @memberOf Monster/Types
*/
class UniqueQueue extends Queue {
/**
*
*/
constructor() {
super();
this.unique = new WeakSet();
}
/**
* Add a new element to the end of the queue.
*
* @param {object} value
* @returns {Queue}
* @throws {TypeError} value is not a object
*/
add(value) {
validateObject(value);
if (!this.unique.has(value)) {
this.unique.add(value);
super.add(value);
}
return this;
}
/**
* remove all entries
*
* @returns {Queue}
*/
clear() {
super.clear();
this.unique = new WeakSet;
return this;
}
/**
* Remove the element at the front of the queue
* If the queue is empty, return undefined.
*
* @return {object}
*/
poll() {
if (this.isEmpty()) {
return undefined;
}
let value = this.data.shift();
this.unique.delete(value);
return value;
}
}
Monster.assignToNamespace('Monster.Types', UniqueQueue);
export {Monster, UniqueQueue}