Proyectos de Subversion Moodle

<?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/>.

/**

 * This file contains functions used by the admin pages

 *

 * @since Moodle 2.1

 * @package admin

 * @copyright 2011 Andrew Davis

 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

defined('MOODLE_INTERNAL') || die();

/**

 * Return a list of page types

 * @param string $pagetype current page type

 * @param stdClass $parentcontext Block's parent context

 * @param stdClass $currentcontext Current context of block

 */

function admin_page_type_list($pagetype, $parentcontext, $currentcontext) {

    $array = array(

        'admin-*' => get_string('page-admin-x', 'pagetype'),

        $pagetype => get_string('page-admin-current', 'pagetype')

    );

    return $array;

}

/**

 * File serving.

 *

 * @param stdClass $course The course object.

 * @param stdClass $cm The cm object.

 * @param context $context The context object.

 * @param string $filearea The file area.

 * @param array $args List of arguments.

 * @param bool $forcedownload Whether or not to force the download of the file.

 * @param array $options Array of options.

 * @return void|false

 */

function core_admin_pluginfile($course, $cm, $context, $filearea, $args, $forcedownload, array $options = array()) {

    global $CFG;

    if (in_array($filearea, ['logo', 'logocompact', 'favicon'])) {

        $size = array_shift($args); // The path hides the size.

        $itemid = clean_param(array_shift($args), PARAM_INT);

        $filename = clean_param(array_shift($args), PARAM_FILE);

        $themerev = theme_get_revision();

        if ($themerev <= 0) {

            // Normalise to 0 as -1 doesn't place well with paths.

             $themerev = 0;

        }

        // Extract the requested width and height.

        $maxwidth = 0;

        $maxheight = 0;

        if (preg_match('/^\d+x\d+$/', $size)) {

            list($maxwidth, $maxheight) = explode('x', $size);

            $maxwidth = clean_param($maxwidth, PARAM_INT);

            $maxheight = clean_param($maxheight, PARAM_INT);

        }

        $lifetime = 0;

        if ($itemid > 0 && $themerev == $itemid) {

            // The itemid is $CFG->themerev, when 0 or less no caching. Also no caching when they don't match.

            $lifetime = DAYSECS * 60;

        }

        // Anyone, including guests and non-logged in users, can view the logos.

        $options = ['cacheability' => 'public'];

        // Check if we've got a cached file to return. When lifetime is 0 then we don't want to cached one.

        $candidate = $CFG->localcachedir . "/core_admin/$themerev/$filearea/{$maxwidth}x{$maxheight}/$filename";

        if (file_exists($candidate) && $lifetime > 0) {

            send_file($candidate, $filename, $lifetime, 0, false, false, '', false, $options);

        }

        // Find the original file.

        $fs = get_file_storage();

        $filepath = "/{$context->id}/core_admin/{$filearea}/0/{$filename}";

        if (!$file = $fs->get_file_by_hash(sha1($filepath))) {

            send_file_not_found();

        }

        // Check whether width/height are specified, and we can resize the image (some types such as ICO cannot be resized).

        if (($maxwidth === 0 && $maxheight === 0) ||

                !$filedata = $file->resize_image($maxwidth, $maxheight)) {

            if ($lifetime) {

                file_safe_save_content($file->get_content(), $candidate);

            }

            send_stored_file($file, $lifetime, 0, false, $options);

        }

        // If we don't want to cached the file, serve now and quit.

        if (!$lifetime) {

            send_content_uncached($filedata, $filename);

        }

        // Save, serve and quit.

        file_safe_save_content($filedata, $candidate);

        send_file($candidate, $filename, $lifetime, 0, false, false, '', false, $options);

    }

    send_file_not_found();

}