patchtester/media/com_patchtester/js/fetcher.js

/**
 * Patch testing component for the Joomla! CMS
 *
 * @copyright  Copyright (C) 2011 - 2012 Ian MacLennan, Copyright (C) 2013 - 2016 Open Source Matters, Inc. All rights reserved.
 * @license    GNU General Public License version 2 or later
 */

if (typeof jQuery === 'undefined') {
    throw new Error('PatchFetcher JavaScript requires jQuery')
}

if (typeof Joomla === 'undefined') {
    throw new Error('PatchFetcher JavaScript requires the Joomla core JavaScript API')
}

!function (jQuery, Joomla, window) {
    'use strict';

    /**
     * Initialize the PatchFetcher object
     *
     * @constructor
     */
    var PatchFetcher = function () {
        var offset = null,
            progress = null,
            path = 'index.php?option=com_patchtester&tmpl=component&format=json';

        var initialize = function () {
            offset = 0;
            progress = 0;
            path = path + '&' + jQuery('#patchtester-token').attr('name') + '=1';

            getRequest('startfetch');
        };

        var getRequest = function (task) {
            jQuery.ajax({
                type: 'GET',
                url: path,
                data: 'task=' + task,
                dataType: 'json',
                success: function (response, textStatus, xhr) {
                    try {
                        if (response === null) {
                            throw textStatus;
                        }
                        if (response.error) {
                            throw response;
                        }

                        jQuery('#patchtester-progress-message').html(response.message);

                        if (response.data.header) {
                            jQuery('#patchtester-progress-header').html(response.data.header);
                        }

                        if (!response.data.complete) {
                            // Send another request
                            getRequest('fetch');
                        }
                    } catch (error) {
                        try {
                            if (response.error) {
                                jQuery('#patchtester-progress-header').text(Joomla.JText._('COM_PATCHTESTER_FETCH_AN_ERROR_HAS_OCCURRED'));
                                jQuery('#patchtester-progress-message').html(response.message);
                            }
                        } catch (ignore) {
                            if (error === '') {
                                error = Joomla.JText._('COM_PATCHTESTER_NO_ERROR_RETURNED');
                            }

                            jQuery('#patchtester-progress-header').text(Joomla.JText._('COM_PATCHTESTER_FETCH_AN_ERROR_HAS_OCCURRED'));
                            jQuery('#patchtester-progress-message').html(error);
                        }
                    }
                    return true;
                },
                error: function (jqXHR, textStatus, errorThrown) {
                    var json = (typeof jqXHR == 'object' && jqXHR.responseText) ? jqXHR.responseText : null;
                    jQuery('#patchtester-progress-header').text(Joomla.JText._('COM_PATCHTESTER_FETCH_AN_ERROR_HAS_OCCURRED'));
                    jQuery('#patchtester-progress-message').html(json);
                }
            });
        }

        initialize();
    };

    jQuery(function () {
        new PatchFetcher();

        if (typeof window.parent.SqueezeBox == 'object') {
            jQuery(window.parent.SqueezeBox).on('close', function () {
                window.parent.location.reload(true);
            });
        }
    });
}(jQuery, Joomla, window);