@w6s/codash/src/core/interceptor.js

A Cordova utility library.

'use strict';

import { each } from '../utils';

class Interceptor {
  constructor() {
    this.handlers = [];
  }

  /**
   * Add a new interceptor to the stack
   *
   * @param {Function} fulfilled The function to handle `then` for a `Promise`
   * @param {Function} rejected The function to handle `reject` for a `Promise`
   *
   * @return {Number} An ID used to remove interceptor later
   */
  use(fulfilled, rejected) {
    this.handlers.push({
      fulfilled: fulfilled,
      rejected: rejected
    });
    return this.handlers.length - 1;
  }

  /**
   * Remove an interceptor from the stack
   *
   * @param {Number} id The ID that was returned by `use`
   */
  eject(id) {
    if (this.handlers[id]) {
      this.handlers[id] = null;
    }
  }

  /**
   * Iterate over all the registered interceptors
   *
   * This method is particularly useful for skipping over any
   * interceptors that may have become `null` calling `eject`.
   *
   * @param {Function} fn The function to call for each interceptor
   */
  forEach(fn) {
    each(this.handlers, (h) => {
      if (h !== null) {
        fn(h);
      }
    });
  }
}

export default Interceptor;