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// This file is part of Moodle - http://moodle.org/ // // Moodle is free software: you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // // Moodle is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with Moodle. If not, see <http://www.gnu.org/licenses/>. /** * A helper used to inform Behat that an operation is in progress and that Behat must wait for it to complete. * * @module core/pending * @copyright 2018 Andrew Nicols <andrew@nicols.co.uk> * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later * @since 3.6 / /* * A helper used to register any long-running operations that are in-progress and that Behat must wait for it to complete. * * This is useful in cases where the user interface may be updated and take some time to change - for example where * applying a transition. * * This data is used by Behat, but may also be consumed by other location too. * * By informing Behat that an action is about to happen, and then that it is complete, allows * Behat to wait for that completion and avoid random failures in automated testing. * * Note: It is recommended that a descriptive key be used to aid in debugging where possible, but this is optional. / export default class { /* * Create a new Pending Promise statically. * * @param {String} pendingKey An identifier to help in debugging * @return {Promise} A Native Promise * @deprecated since Moodle 4.2 / static request(pendingKey) { window.console.error( `The core/pending::request method has been deprecated. ` + `Please use one of the alternative calls to core/pending, for example "new Pending('${pendingKey}')". ` + `Called with ${pendingKey}` ); return new this(pendingKey); } /* * Request a new pendingPromise for later resolution. * * When the action you are performing is complete, simply call resolve on the returned Promise. * * @param {String} [pendingKey='pendingPromise'] An identifier to help in debugging * @return {Promise} A Native Promise * @example * import Pending from 'core/pending'; * import {getString} from 'core/str'; * * const stringPromise = new Pending('mod_myexample/setup'); * const myString = getString('ok') * .then(okay => { * window.console.log(okay); * }) * .then(okay => stringPromise.resolve(okay)); / constructor(pendingKey = 'pendingPromise') { let resolver; let rejector; const pendingPromise = this.constructor.Promise((resolve, reject) => { resolver = resolve; rejector = reject; }, pendingKey); pendingPromise.resolve = resolver; pendingPromise.reject = rejector; return pendingPromise; } /* * Create a new Pending Promise with the same interface as a native Promise. * * @param {Callable} fn A callable which takes the resolve and reject arguments as in a Native Promise constructor. * @param {String} [pendingKey='pendingPromise'] An identifier to help in debugging * @returns {Promise} * @since Moodle 4.2 * @example * // Use the Pending class in the same way that you would a Native Promise. * import Pending from 'core/pending'; * import {getString} from 'core/str'; * * export const init => { * Pending.Promise((resolve, reject) => { * getString('ok') * .then(okay => { * window.console.log(okay); * return okay; * }) * .then(resolve) * .catch(reject); * }, 'mod_myexample/setup:init'); * }; */ static Promise(fn, pendingKey = 'pendingPromise') { const resolver = new Promise((resolve, reject) => { M.util.js_pending(pendingKey); fn(resolve, reject); }); resolver.then(() => { M.util.js_complete(pendingKey); return; }).catch(); return resolver; } }

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