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<?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/>.
/**
* repository_recent class is used to browse recent used files
*
* @since 2.0
* @package repository
* @subpackage recent
* @copyright 2010 Dongsheng Cai <dongsheng@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
define('DEFAULT_RECENT_FILES_NUM', 50);
class repository_recent extends repository {
/**
* Initialize recent plugin
* @param int $repositoryid
* @param int $context
* @param array $options
*/
public function __construct($repositoryid, $context = SYSCONTEXTID, $options = array()) {
parent::__construct($repositoryid, $context, $options);
$number = get_config('recent', 'recentfilesnumber');
$number = (int)$number;
if (empty($number)) {
$this->number = DEFAULT_RECENT_FILES_NUM;
} else {
$this->number = $number;
}
}
/**
* recent plugin doesn't require login, so list all files
* @return mixed
*/
public function print_login() {
return $this->get_listing();
}
private function get_recent_files($limitfrom = 0, $limit = DEFAULT_RECENT_FILES_NUM) {
// XXX: get current itemid
global $USER, $DB, $itemid;
$sql = 'SELECT * FROM {files} files1
JOIN (SELECT contenthash, filename, MAX(id) AS id
FROM {files}
WHERE userid = ? AND filename != ? AND ((filearea = ? AND itemid = ?) OR filearea != ?)
GROUP BY contenthash, filename) files2 ON files1.id = files2.id
ORDER BY files1.timemodified DESC';
$params = array('userid'=>$USER->id, 'filename'=>'.', 'filearea'=>'draft', 'itemid'=>$itemid, 'draft');
$rs = $DB->get_recordset_sql($sql, $params, $limitfrom, $limit);
$result = array();
foreach ($rs as $file_record) {
$info = array();
$info['contextid'] = $file_record->contextid;
$info['itemid'] = $file_record->itemid;
$info['filearea'] = $file_record->filearea;
$info['component'] = $file_record->component;
$info['filepath'] = $file_record->filepath;
$info['filename'] = $file_record->filename;
$result[$file_record->pathnamehash] = $info;
}
$rs->close();
return $result;
}
/**
* Get file listing
*
* @param string $encodedpath
* @param string $path not used by this plugin
* @return mixed
*/
public function get_listing($encodedpath = '', $page = '') {
global $CFG, $USER, $OUTPUT;
$ret = array();
$ret['dynload'] = true;
$ret['nosearch'] = true;
$ret['nologin'] = true;
$list = array();
$files = $this->get_recent_files(0, $this->number);
try {
foreach ($files as $file) {
$params = base64_encode(serialize($file));
$node = array(
'title' => $file['filename'],
'size' => 0,
'date' => '',
'source'=> $params,
'thumbnail' => $OUTPUT->pix_url(file_extension_icon($file['filename'], 32))->out(false),
);
$list[] = $node;
}
} catch (Exception $e) {
throw new repository_exception('emptyfilelist', 'repository_recent');
}
$ret['list'] = array_filter($list, array($this, 'filter'));
return $ret;
}
public static function get_type_option_names() {
return array('recentfilesnumber', 'pluginname');
}
public function type_config_form($mform) {
parent::type_config_form($mform);
$number = get_config('repository_recent', 'recentfilesnumber');
if (empty($number)) {
$number = DEFAULT_RECENT_FILES_NUM;
}
$mform->addElement('text', 'recentfilesnumber', get_string('recentfilesnumber', 'repository_recent'));
$mform->setDefault('recentfilesnumber', $number);
}
/**
* This plugin doesn't support to link to external links
*
* @return int
*/
public function supported_returntypes() {
return FILE_INTERNAL;
}
/**
* This function overwrite the default implement to copying file using file_storage
*
* @global object $USER
* @global object $DB
* @param string $encoded The information of file, it is base64 encoded php serialized data
* @param string $draftitemid itemid
* @param string $new_filename The intended name of file
* @param string $new_filepath the new path in draft area
* @return array The information of file
*/
public function copy_to_area($encoded, $draftitemid, $new_filepath, $new_filename) {
global $USER, $DB;
$user_context = get_context_instance(CONTEXT_USER, $USER->id);
$fs = get_file_storage();
$params = unserialize(base64_decode($encoded));
$contextid = clean_param($params['contextid'], PARAM_INT);
$fileitemid = clean_param($params['itemid'], PARAM_INT);
$filename = clean_param($params['filename'], PARAM_FILE);
$filepath = clean_param($params['filepath'], PARAM_PATH);;
$filearea = clean_param($params['filearea'], PARAM_ALPHAEXT);
$component = clean_param($params['component'], PARAM_ALPHAEXT);
// XXX:
// When user try to pick a file from other filearea, normally file api will use file browse to
// operate the files with capability check, but in some areas, users don't have permission to
// browse the files (for example, forum_attachment area).
//
// To get 'recent' plugin working, we need to use lower level file_stoarge class to bypass the
// capability check, we will use a better workaround to improve it.
if ($stored_file = $fs->get_file($contextid, $component, $filearea, $fileitemid, $filepath, $filename)) {
// verify user id
if ($USER->id != $stored_file->get_userid()) {
throw new moodle_exception('errornotyourfile', 'repository');
}
$file_record = array('contextid'=>$user_context->id, 'component'=>'user', 'filearea'=>'draft',
'itemid'=>$draftitemid, 'filepath'=>$new_filepath, 'filename'=>$new_filename, 'sortorder'=>0);
// test if file already exists
if (repository::draftfile_exists($draftitemid, $new_filepath, $new_filename)) {
// create new file
$unused_filename = repository::get_unused_filename($draftitemid, $new_filepath, $new_filename);
$file_record['filename'] = $unused_filename;
// create a tmp file
$fs->create_file_from_storedfile($file_record, $stored_file);
$event = array();
$event['event'] = 'fileexists';
$event['newfile'] = new stdClass;
$event['newfile']->filepath = $new_filepath;
$event['newfile']->filename = $unused_filename;
$event['newfile']->url = moodle_url::make_draftfile_url($draftitemid, $new_filepath, $unused_filename)->out();
$event['existingfile'] = new stdClass;
$event['existingfile']->filepath = $new_filepath;
$event['existingfile']->filename = $new_filename;
$event['existingfile']->url = moodle_url::make_draftfile_url($draftitemid, $new_filepath, $new_filename)->out();;
return $event;
} else {
$fs->create_file_from_storedfile($file_record, $stored_file);
$info = array();
$info['title'] = $new_filename;
$info['itemid'] = $draftitemid;
$info['filesize'] = $stored_file->get_filesize();
$info['contextid'] = $user_context->id;
return $info;
}
}
return false;
}
/**
* Does this repository used to browse moodle files?
*
* @return boolean
*/
public function has_moodle_files() {
return true;
}
}
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