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           efrain | 
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           <?php
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           // This file is part of Moodle - http://moodle.org/
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           //
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           // Moodle is free software: you can redistribute it and/or modify
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           // it under the terms of the GNU General Public License as published by
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           // the Free Software Foundation, either version 3 of the License, or
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           // (at your option) any later version.
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           //
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           // Moodle is distributed in the hope that it will be useful,
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           // but WITHOUT ANY WARRANTY; without even the implied warranty of
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           // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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           // GNU General Public License for more details.
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           //
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           // You should have received a copy of the GNU General Public License
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           // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
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           namespace tool_mobile;
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           use html_writer;
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           /**
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            * Allows plugins to add any elements to the footer.
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            *
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            * @package    tool_mobile
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            * @copyright  2024 Andrew Lyons <andrew@nicols.co.uk>
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            * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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            */
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           class hook_callbacks {
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               /**
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                * Callback to add head elements.
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                *
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                * @param \core\hook\output\before_standard_head_html_generation $hook
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                */
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               public static function before_standard_head_html_generation(
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                   \core\hook\output\before_standard_head_html_generation $hook,
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               ): void {
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                   global $CFG, $PAGE;
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                   // Smart App Banners meta tag is only displayed if mobile services are enabled and configured.
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                   if (!empty($CFG->enablemobilewebservice)) {
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                       $mobilesettings = get_config('tool_mobile');
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                       if (!empty($mobilesettings->enablesmartappbanners)) {
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                           if (!empty($mobilesettings->iosappid)) {
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                               $hook->add_html(
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                                   '<meta name="apple-itunes-app" content="app-id=' . s($mobilesettings->iosappid) . ', ' .
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                                       'app-argument=' . $PAGE->url->out() . '"/>'
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                               );
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                           }
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                           if (!empty($mobilesettings->androidappid)) {
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                               $mobilemanifesturl = "$CFG->wwwroot/$CFG->admin/tool/mobile/mobile.webmanifest.php";
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                               $hook->add_html('<link rel="manifest" href="' . $mobilemanifesturl . '" />');
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                           }
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                       }
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                   }
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               }
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               /**
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                * Callback to add head elements.
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                *
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                * @param \core\hook\output\before_standard_footer_html_generation $hook
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                */
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               public static function before_standard_footer_html_generation(
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                   \core\hook\output\before_standard_footer_html_generation $hook,
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               ): void {
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                   global $CFG;
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                   require_once(__DIR__ . '/../lib.php');
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                   if (empty($CFG->enablemobilewebservice)) {
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                       return;
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                   }
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                   $url = tool_mobile_create_app_download_url();
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                   if (empty($url)) {
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                       return;
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                   }
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                   $hook->add_html(
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           ariadna | 
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                       html_writer::div(
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                           html_writer::link($url, get_string('getmoodleonyourmobile', 'tool_mobile'), ['class' => 'mobilelink']),
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                       ),
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           efrain | 
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                   );
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               }
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               /**
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                * Callback to recover $SESSION->wantsurl.
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                *
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                * @param \core_user\hook\after_login_completed $hook
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                */
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               public static function after_login_completed(
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                   \core_user\hook\after_login_completed $hook,
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               ): void {
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                   global $SESSION, $CFG;
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                   // Check if the user is doing a mobile app launch, if that's the case, ensure $SESSION->wantsurl is correctly set.
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                   if (!NO_MOODLE_COOKIES && !empty($_COOKIE['tool_mobile_launch'])) {
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                       if (empty($SESSION->wantsurl) || strpos($SESSION->wantsurl, '/tool/mobile/launch.php') === false) {
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                           $params = json_decode($_COOKIE['tool_mobile_launch'], true);
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                           $SESSION->wantsurl = (new \moodle_url("/$CFG->admin/tool/mobile/launch.php", $params))->out(false);
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                       }
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                   }
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               }
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           }
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