css.php

<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle 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.
//
// Moodle 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 Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**
 * @package mod_dataform
 * @copyright 2011 Itamar Tzadok
 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 *
 * The Dataform has been developed as an enhanced counterpart
 * of Moodle's Database activity module (1.9.11+ (20110323)).
 * To the extent that Dataform code corresponds to Database code,
 * certain copyrights on the Database module may obtain.
 */

require_once('../../config.php');

$urlparams = new \stdClass;
$urlparams->d = optional_param('d', 0, PARAM_INT);
$urlparams->id = optional_param('id', 0, PARAM_INT);
$urlparams->cssedit = optional_param('cssedit', 0, PARAM_BOOL);   // edit mode

if ($urlparams->cssedit) {
    require_once("$CFG->libdir/formslib.php");

    class mod_dataform_css_form extends moodleform {

        public function definition() {
            global $CFG, $COURSE;

            $mform = &$this->_form;

            // Buttons.
            $this->add_action_buttons(true);

            // Css.
            $mform->addElement('header', 'generalhdr', get_string('headercss', 'dataform'));

            // Includes.
            $attributes = array('wrap' => 'virtual', 'rows' => 3, 'style' => 'width:95%');
            $mform->addElement('textarea', 'cssincludes', get_string('cssincludes', 'dataform'), $attributes);

            // Code.
            $attributes = array('wrap' => 'virtual', 'rows' => 5, 'style' => 'width:95%');
            $mform->addElement('textarea', 'css', get_string('csscode', 'dataform'), $attributes);

            // Uploads.
            $options = array(
                'subdirs' => 0,
                'maxbytes' => $COURSE->maxbytes,
                'maxfiles' => 10,
                'accepted_types' => array('*.css')
            );
            $mform->addElement('filemanager', 'cssupload', get_string('cssupload', 'dataform'), null, $options);

            // Buttons.
            $this->add_action_buttons(true);
        }

    }

    // Set a dataform object.
    $df = mod_dataform_dataform::instance($urlparams->d, $urlparams->id);
    $df->require_manage_permission('css');

    $df->set_page('css', array('urlparams' => $urlparams));

    // Activate navigation node.
    navigation_node::override_active_url(new moodle_url('/mod/dataform/css.php', array('id' => $df->cm->id, 'cssedit' => 1)));

    $mform = new mod_dataform_css_form(new moodle_url('/mod/dataform/css.php', array('d' => $df->id, 'cssedit' => 1)));

    if ($data = $mform->get_data()) {
        // Update the dataform.
        $rec = new stdClass;
        $rec->css = $data->css;
        $rec->cssincludes = $data->cssincludes;
        $df->update($rec, get_string('csssaved', 'dataform'));

        // Add uploaded files.
        $options = array(
            'subdirs' => 0,
            'maxbytes' => $COURSE->maxbytes,
            'maxfiles' => 10,
            'accepted_types' => array('*.css')
        );
        file_save_draft_area_files($data->cssupload, $df->context->id, 'mod_dataform', 'css', 0, $options);
    }

    $output = $df->get_renderer();
    echo $output->header(array('tab' => 'css', 'heading' => $df->name, 'urlparams' => $urlparams));

    $options = array(
        'subdirs' => 0,
        'maxbytes' => $COURSE->maxbytes,
        'maxfiles' => 10,
    );
    $draftitemid = file_get_submitted_draft_itemid('cssupload');
    file_prepare_draft_area($draftitemid, $df->context->id, 'mod_dataform', 'css', 0, $options);

    $data = $df->data;
    $data->cssupload = $draftitemid;

    $mform->set_data($data);
    $mform->display();
    echo $output->footer();

} else {
    // Session not used here.
    defined('NO_MOODLE_COOKIES') or define('NO_MOODLE_COOKIES', true);

    // Seconds to cache this stylesheet.
    $lifetime  = 600;

    $PAGE->set_url('/mod/dataform/css.php', array('d' => $urlparams->d));

    if ($cssdata = $DB->get_field('dataform', 'css', array('id' => $urlparams->d))) {
        header('Last-Modified: ' . gmdate('D, d M Y H:i:s', time()) . ' GMT');
        header('Expires: ' . gmdate("D, d M Y H:i:s", time() + $lifetime) . ' GMT');
        header('Cache-control: max_age = '. $lifetime);
        header('Pragma: ');
        // Correct MIME type.
        header('Content-type: text/css; charset=utf-8');

        echo $cssdata;
    }
}