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- <?php // $Id: downloadfolder.inc.php 17989 2009-01-25 05:51:54Z yannoo $
- /* For licensing terms, see /dokeos_license.txt */
- /**
- ==============================================================================
- * Functions and main code for the download folder feature
- *
- * @package dokeos.work
- ==============================================================================
- */
- $path = $_GET['path'];
- //prevent some stuff
- if(empty($path))
- {
- $path='/';
- }
- //zip library for creation of the zipfile
- include(api_get_path(LIBRARY_PATH).'pclzip/pclzip.lib.php');
- //we need this path to clean it out of the zip file
- //I'm not using dirname as it gives too much problems (cfr. \)
- $remove_dir = ($path!='/') ? substr($path,0,strlen($path) - strlen(basename($path))) : '/';
- //place to temporarily stash the zipfiles
- $temp_zip_dir = $sys_course_path.$_course['path']."/temp";
- //create the temp dir if it doesn't exist
- //or do a cleanup befor creating the zipfile
- if (!is_dir($temp_zip_dir)) {
- mkdir($temp_zip_dir);
- } else {
- //cleanup: check the temp dir for old files and delete them
- $handle=opendir($temp_zip_dir);
- while (false!==($file = readdir($handle))) {
- if ($file != "." && $file != "..") {
- //the "age" of the file in hours
- $Diff = (time() - filemtime("$temp_zip_dir/$file"))/60/60;
- //delete files older than 4 hours
- if ($Diff > 4) {
- unlink("$temp_zip_dir/$file");
- }
- }
- }
- closedir($handle);
- }
- //create zipfile of given directory
- $temp_zip_file = $temp_zip_dir."/".md5(time()).".zip";
- $zip_folder= new PclZip($temp_zip_file);
- $tbl_student_publication = Database::get_course_table(TABLE_STUDENT_PUBLICATION);
- $prop_table = Database::get_course_table(TABLE_ITEM_PROPERTY);
- //Put the files in the zip
- //2 possibilities: admins get all files and folders in the selected folder (except for the deleted ones)
- //normal users get only visible files that are in visible folders
- //admins are allowed to download invisible files
- if (is_allowed_to_edit()) {
- //folder we want to zip --> no longer used, deleted files are included too like this
- //$what_to_zip = $sys_course_path.$_course['path']."/document".$path;
- //creation of the zipped folder
- //$zip_folder->create($what_to_zip ,PCLZIP_OPT_REMOVE_PATH, $sys_course_path.$_course['path']."/document".$remove_dir );
- //set the path that will be used in the query
- if($path=='/') {
- $querypath=''; // to prevent ...path LIKE '//%'... in query
- } else {
- $querypath=$path;
- }
- //search for all files that are not deleted => visibility != 2
- $query = Database::query("SELECT url FROM $tbl_student_publication AS work,$prop_table AS props WHERE props.tool='work' AND work.id=props.ref AND work.url LIKE 'work".$querypath."/%' AND work.filetype='file' AND props.visibility<>'2'",__FILE__,__LINE__);
- //add tem to the zip file
- while ($not_deleted_file = mysql_fetch_assoc($query)) { //var_dump($sys_course_path.$_course['path']."/".$not_deleted_file['url']);exit();
- $zip_folder->add($sys_course_path.$_course['path']."/".$not_deleted_file['url'],PCLZIP_OPT_REMOVE_PATH, $sys_course_path.$_course['path']."/work".$remove_dir);
- }
- }
- //for other users, we need to create a zipfile with only visible files and folders
- else
- {
- if ($path=='/') {
- $querypath=''; // to prevent ...path LIKE '//%'... in query
- } else {
- $querypath=$path;
- }
- //big problem: visible files that are in a hidden folder are included when we do a query for visiblity='v'!!!
- //so... I do it in a couple of steps:
- //1st: get all files that are visible in the given path
- $query = Database::query("SELECT url FROM $tbl_student_publication AS work,$prop_table AS props WHERE props.tool='work' AND work.id=props.ref AND work.url LIKE 'work".$querypath."/%' AND work.filetype='file' AND props.visibility='1' AND props.lastedit_user_id='".api_get_user_id()."'",__FILE__,__LINE__);
- //add them to an array
- $all_visible_files_path = array();
- while ($all_visible_files = mysql_fetch_assoc($query)) {
- $all_visible_files_path[] = $all_visible_files['url'];
- }
- //2nd: get all folders that are invisible in the given path
- $query2 = Database::query("SELECT url FROM $tbl_student_publication AS work,$prop_table AS props WHERE props.tool='work' AND work.id=props.ref AND work.url LIKE 'work".$querypath."/%' AND work.filetype='file' AND props.visibility<>'1' AND props.lastedit_user_id='".api_get_user_id()."'",__FILE__,__LINE__);
- //if we get invisible folders, we have to filter out these results from all visible files we found
- if (Database::num_rows($query2)>0) {
- //add tem to an array
- while ($invisible_folders = mysql_fetch_assoc($query2)) {
- //3rd: get all files that are in the found invisible folder (these are "invisible" too)
- $query3 = Database::query("SELECT url FROM $tbl_student_publication AS work,$prop_table AS props WHERE props.tool='work' AND work.id=props.ref AND work.url LIKE 'work".$invisible_folders['path']."/%' AND work.filetype='file' AND props.visibility='1' AND props.lastedit_user_id='".api_get_user_id()."'",__FILE__,__LINE__);
- //add tem to an array
- while ($files_in_invisible_folder = mysql_fetch_assoc($query3)) {
- $files_in_invisible_folder_path[] = $files_in_invisible_folder['url'];
- }
- }
- //compare the array with visible files and the array with files in invisible folders
- //and keep the difference (= all visible files that are not in an invisible folder)
- $files_for_zipfile = diff((array) $all_visible_files_path,(array) $files_in_invisible_folder_path);
- } else {
- //no invisible folders found, so all visible files can be added to the zipfile
- $files_for_zipfile = $all_visible_files_path;
- }
- //add all files in our final array to the zipfile
- for ($i=0;$i<count($files_for_zipfile);$i++) {
- $zip_folder->add($sys_course_path.$_course['path']."/".$files_for_zipfile[$i],PCLZIP_OPT_REMOVE_PATH, $sys_course_path.$_course['path']."/work".$remove_dir);
- }
- }//end for other users
- //logging
- // launch event
- event_download(basename($path).'.zip (folder)');
- //start download of created file
- $name = basename($path).'.zip';
- DocumentManager::file_send_for_download($temp_zip_file,true,$name);
- exit;
- /**
- ==============================================================================
- * Extra function (only used here)
- ==============================================================================
- */
- /**
- * Return the difference between two arrays, as an array of those key/values
- * Use this as array_diff doesn't give the
- *
- * @param array $arr1 first array
- * @param array $arr2 second array
- * @return difference between the two arrays
- */
- function diff($arr1,$arr2) {
- $res = array(); $r=0;
- foreach ($arr1 as $av) {
- if (!in_array($av,$arr2)){
- $res[$r]=$av; $r++;
- }
- }
- return $res;
- }
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