'use strict';

/**
 * Licensed Materials - Property of IBM
 * IBM Cognos Products: BI Cloud (C) Copyright IBM Corp. 2017
 * US Government Users Restricted Rights - Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
 */
define(['require'], function (require) {
	'use strict';

	/**
 * This loader does dynamic requires based on relative paths. It must be located under dashboard-analytics/,
 * all paths it requires are relative to dashboard-analytics/[module]
 */

	if (require.toUrl('./').indexOf('dashboard-analytics') === -1) {
		throw new Error('Loader.js MUST be in the dashboard-analytics folder');
	}

	return {
		_require: require,
		/**
   * Loads a module relative to dashboard core. DONT MOVE THIS FILE
   * @param array
   */
		load: function load(modules) {
			if (!Array.isArray(modules)) {
				throw new Error('modules must be an array');
			}

			var ModulesToLoad = [];
			modules.forEach(function (element) {
				if (!element || !element.length) {
					ModulesToLoad.push('');
				} else if (element.indexOf('text!') !== -1) {
					ModulesToLoad.push(element.replace('text!', 'text!../'));
				} else {
					ModulesToLoad.push('../' + element);
				}
			});

			var promises = [];
			var deferreds = [];
			ModulesToLoad.forEach(function () {
				var dfd = {};
				var promise = new Promise(function (resolve, reject) {
					dfd.resolve = resolve;
					dfd.reject = reject;
				});
				deferreds.push(dfd);
				promises.push(promise);
			});

			this._require(ModulesToLoad, function () {
				for (var i = 0; i < ModulesToLoad.length; i++) {
					deferreds[i].resolve(i < arguments.length ? arguments[i] : undefined);
				}
			}, function (err) {
				deferreds[0].reject(err);
			});
			return Promise.all(promises);
		}
	};
});
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