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