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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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           /**
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            * This file is part of the Database module for Moodle
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            *
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            * @copyright 2005 Martin Dougiamas  http://dougiamas.com
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            * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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            * @package mod_data
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            */
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           use mod_data\manager;
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           use mod_data\preset;
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           define('NO_MOODLE_COOKIES', true); // Session not used here.
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           require_once('../../config.php');
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           $id = optional_param('id', 0, PARAM_INT); // Course module id.
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           $d = optional_param('d', 0, PARAM_INT); // Database id.
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           $presetfullname = optional_param('preset', '', PARAM_PATH); // The directory the preset is in.
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           $lifetime  = 600; // Seconds to cache this stylesheet.
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           $url = new moodle_url('/mod/data/css.php');
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           $manager = null;
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           if ($id) {
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               list($course, $cm) = get_course_and_cm_from_cmid($id, manager::MODULE);
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               $manager = manager::create_from_coursemodule($cm);
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               $instance = $manager->get_instance();
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           } else {
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               // We must have the database activity id.
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               $d = required_param('d', PARAM_INT);
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               $instance = $DB->get_record('data', ['id' => $d], '*', MUST_EXIST);
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               $manager = manager::create_from_instance($instance);
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           }
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           $url->param('d', $instance->id);
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           // Get the content.
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           if ($presetfullname) {
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               $url->param('preset', $presetfullname);
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               $preset = preset::create_from_fullname($manager, $presetfullname);
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               $content = $preset->get_template_content('csstemplate');
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               $lifetime  = 60; // Preset preview does not need a long cache.
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           } else {
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               $content = $instance->csstemplate;
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           }
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           $PAGE->set_url($url);
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           header('Last-Modified: ' . gmdate('D, d M Y H:i:s', time()) . ' GMT');
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           header('Expires: ' . gmdate("D, d M Y H:i:s", time() + $lifetime) . ' GMT');
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           header('Cache-control: max_age = '. $lifetime);
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           header('Pragma: ');
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           header('Content-type: text/css; charset=utf-8');  // Correct MIME type.
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           echo $content;
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