<?php
/**
 * @version $Id$
 * @package DJ-MediaTools
 * @copyright Copyright (C) 2017 DJ-Extensions.com, All rights reserved.
 * @license http://www.gnu.org/licenses GNU/GPL
 * @author url: https://dj-extensions.com
 * @author email contact@dj-extensions.com
 * @developer Szymon Woronowski - szymon.woronowski@design-joomla.eu
 *
 * DJ-MediaTools 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.
 *
 * DJ-MediaTools 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 DJ-MediaTools. If not, see <http://www.gnu.org/licenses/>.
 *
 */

defined('_JEXEC') or die('Restricted access');

class DJLicense
{

    public static function getSubscription($name)
    {

        if (!in_array('curl', get_loaded_extensions())) {
            return self::renderAlert(JText::_('COM_DJMEDIATOOLS_DJLIC_CURL_NOT_INSTALLED'), 'error');
        }

	    $app	= JFactory::getApplication();

        $ext = 'pkg_dj-' . strtolower($name);

        self::setUpdateServer($name);

        $db = JFactory::getDBO();
        $query = "SELECT manifest_cache FROM #__extensions WHERE element ='" . $ext . "'";
        $db->setQuery($query);
        $result = $db->loadResult();

        // we change ext name to component, because package don't have assigned license
        $ext = 'com_dj' . strtolower($name);

        if (!$result) { // in case package wasn't installed check the version of the component
            $query = "SELECT manifest_cache FROM #__extensions WHERE element ='" . $ext . "'";
            $db->setQuery($query);
            $result = $db->loadResult();
        }

        $mc = json_decode($result);
        $version = $mc->version;
        $config = JFactory::getConfig();

        $secret_file = JFile::makeSafe('license_' . $config->get('secret') . '.txt');
        $license_file = JPath::clean(dirname(__FILE__) . '/../' . $secret_file);

        if (JFile::exists($license_file)) {
            $license = file_get_contents($license_file);
        } else {
            $license = '';
        }

	    $icon_class = ($license=='') ?  'djlic_invalid' : 'djlic_valid';
	    $u = JUri::getInstance();

	    $update = '<div class="djlic_box">';
	    $update .= '<div class="djlic_logo_wrapper">';
	    $update .= '<div class="djlic_logo"><img style="width: 70px;" alt="DJ-' . $name . '" src="' . JURI::base() . 'components/com_djcatalog2/assets/images/dj-catalog2.svg" /></div>';
	    $update .= '<div class="djlic_title">DJ-' . $name . '</div>';
	    $update .= '</div>';
	    $update .= '<div class="djlic_version">';
	    $update .= '<span class="' . $icon_class . '"></span>';
	    $update .= '<div class="djlic_info">';
	    $update .= '<a href="https://dj-extensions.com/changelog/dj-mediatools/" target="_blank">' . JText::_('COM_DJMEDIATOOLS_DJLIC_CHANGELOG') . '</a>';
	    $update .= '</div>';
	    $update .= '<div class="djlic_info">';

	    $update .= '<p>' . JText::_('COM_DJMEDIATOOLS_DJLIC_ENTER_LICENSE') . ' <a href="//' . $u->getHost() . '" target="_blank">' . $u->getHost() . '</a></p>';
	    $update .= '<input id="license" type="text" name="license" class="input input-large" placeholder="' . JText::_('DJUPDATER_PASTE_KEY') . '" value="' . trim($license) . '" /> ';
	    $update .= '<button id="register" class="btn btn-djex" href="#">' . JText::_('DJUPDATER_REGISTER_KEY') . '</button> ';
	    $update .= '<a class="btn btn-warning" target="_blank" href="https://dj-extensions.com/dj-mediatools">' . JText::_('DJUPDATER_BUY_LICENSE') . '</a><br /><br />';

	    if ($license == '') {
		    $update .= '<span class="djlic_iline3">' . JText::_('COM_DJMEDIATOOLS_DJLIC_INVALID_INFO') . '</span>';
	    }

	    $update .= '</div>';
	    $update .= '</div>';


        $js = "
			jQuery(document).ready(function(){
			
				var button = jQuery('#register');
				var loader = jQuery('<i class=\"icon-refresh djspin\" />');
				var input = jQuery('#license');
			
				if (input.val() != '') {
					input.addClass('readonly').attr('readonly', 'readonly');
				}
				input.click(function(){
					input.removeAttr('disabled')
						.removeAttr('readonly')
						.removeClass('readonly');
				});
			
				button.click(function(e){
					button.prop('disabled', true);
					button.prepend(loader);
					e.preventDefault();
			
					jQuery.ajax({
						data: {
							option: '" . $ext . "',
							task: 'license.save',
							extension: '" . $name . "',
							license: jQuery('#license').val()
						}
					}).done(function(data) {
						button.closest('.djlic_invalid, .djlic_expired').before(jQuery(data));
						setTimeout(function(){ location.reload(); }, 1000);
					})
					.fail(function() {
						alert( 'connection error' );
						button.prop('disabled', false);
						loader.detach();
					});
				});
								
			});
		";

        JFactory::getDocument()->addScriptDeclaration($js);

        return $update;

    }

    public static function renderAlert($msg, $type = '', $title = '')
    {
        if (!in_array($type, array('success', 'error', 'info', ''))) $type = 'info';

        $html = '<div class="alert alert-' . $type . '">'
            . (!empty($title) ? '<h3>' . $title . '</h3>' : '')
            . '<div class="alert-body">' . $msg . '</div>'
            . '</div>';

        return $html;
    }

    public static function setUpdateServer($name)
    {

        if (empty($name)) return;
        // update the update server information for package
        $db = JFactory::getDbo();
        $config = JFactory::getConfig();
        $secret_file = JFile::makeSafe('license_' . $config->get('secret') . '.txt');
        $license_file = JPath::clean(JPATH_ROOT . '/administrator/components/com_dj' . strtolower($name) . '/' . $secret_file);

        if (JFile::exists($license_file)) {
            $license = file_get_contents($license_file);
        } else {
            $license = '';
        }

        $query = "SELECT extension_id, manifest_cache FROM #__extensions WHERE element='pkg_dj-" . strtolower($name) . "' AND type='package' ";
        $db->setQuery($query);
        $pkg = $db->loadObject();

        if ($pkg) {
            $mc = json_decode($pkg->manifest_cache);
            $version = $mc->version;

            $extra_query = 'dlid=' . $license . '&v=' . $version . '&site=' . JURI::root();

            $db->setQuery("SELECT COUNT(*) FROM #__update_sites WHERE name='DJ-" . $name . "' AND type='extension'");
            if ($db->loadResult() > 0) {
                $db->setQuery("UPDATE #__update_sites SET
	                    extra_query='" . addslashes($extra_query) . "'
	                    WHERE name='DJ-" . $name . "' AND type='extension'");
            } else {
                $db->setQuery("INSERT INTO #__update_sites (`name`, `type`, `location`, `enabled`, `extra_query`) VALUES
	                    ('DJ-" . $name . "', 'extension', 'https://dj-extensions.com/index.php?option=com_ars&view=update&task=stream&format=xml&id=2', 1, '" . addslashes($extra_query) . "')");
                $db->execute();

                $update_site_id = $db->insertid();
                $db->setQuery("INSERT INTO #__update_sites_extensions (`update_site_id`, `extension_id`)
						VALUES (" . $update_site_id . ", " . $pkg->extension_id . ")");
            }
            $db->execute();
        }
    }
}