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170 lines
7.5 KiB
170 lines
7.5 KiB
<?php
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/* For licensing terms, see /license.txt */
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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 chamilo.document
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*/
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set_time_limit(0);
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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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$path = '/';
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}
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// Check to see if they want to download an existing folder
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if (($path != '/') && (!DocumentManager::get_document_id($_course, $path))) {
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$path = '/';
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}
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//a student should not be able to download a root shared directory
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if (($path == '/shared_folder' || $path=='/shared_folder_session_'.api_get_session_id()) && (!api_is_allowed_to_edit() || !api_is_platform_admin())){
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echo '<div align="center">';
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Display::display_error_message(get_lang('NotAllowedClickBack').'<br /><br /><a href="'.$_SERVER['HTTP_REFERER'].'">'.get_lang('BackToPreviousPage').'</a><br />', false);
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echo '</div>';
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exit;
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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 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, api_get_permissions_for_new_directories());
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}
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// Cleanup: check the temp dir for old files and delete them
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else {
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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 ($diff > 4) unlink("$temp_zip_dir/$file");
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}
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}
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closedir($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($temp_zip_file);
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$doc_table = Database::get_course_table(TABLE_DOCUMENT);
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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 = Database::query("SELECT path FROM $doc_table AS docs,$prop_table AS props WHERE props.tool='".TOOL_DOCUMENT."' AND docs.id=props.ref AND docs.path LIKE '".$querypath."/%' AND docs.filetype='file' AND props.visibility<>'2' AND props.to_group_id=".$to_group_id."");
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// Add tem to the zip file
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while ($not_deleted_file = Database::fetch_assoc($query)) {
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$zip_folder->add($sys_course_path.$_course['path'].'/document'.$not_deleted_file['path'], PCLZIP_OPT_REMOVE_PATH, $sys_course_path.$_course['path'].'/document'.$remove_dir);
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}
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}
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// For other users, we need to create a zipfile with only visible files and folders
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else {
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if ($path == '/') {
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$querypath = ''; // To prevent ...path LIKE '//%'... in query
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} else {
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$querypath = $path;
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}
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// A big problem: Visible files that are in a hidden folder are included when we do a query for visiblity='v'
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// So... I do it in a couple of steps:
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// 1st: Get all files that are visible in the given path
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$query = Database::query("SELECT path FROM $doc_table AS docs,$prop_table AS props WHERE props.tool='".TOOL_DOCUMENT."' AND docs.id=props.ref AND docs.path LIKE '".$querypath."/%' AND props.visibility='1' AND docs.filetype='file' AND props.to_group_id=".$to_group_id);
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// Add them to an array
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while ($all_visible_files = Database::fetch_assoc($query)) {
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$all_visible_files_path[] = $all_visible_files['path'];
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//echo "visible files: ".$sys_course_path.$_course['path'].'/document'.$all_visible_files['path']."<br>";
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}
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//echo('<pre>');
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//print_r($all_visible_files_path);
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//echo('</pre>');
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// 2nd: Get all folders that are invisible in the given path
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$query2 = Database::query("SELECT path FROM $doc_table AS docs,$prop_table AS props WHERE props.tool='".TOOL_DOCUMENT."' AND docs.id=props.ref AND docs.path LIKE '".$querypath."/%' AND props.visibility<>'1' AND docs.filetype='folder'");
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// If we get invisible folders, we have to filter out these results from all visible files we found
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if (Database::num_rows($query2) > 0) {
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// Add tem to an array
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while ($invisible_folders = Database::fetch_assoc($query2)) {
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//3rd: Get all files that are in the found invisible folder (these are "invisible" too)
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//echo "<br /><br />invisible folders: ".$sys_course_path.$_course['path'].'/document'.$invisible_folders['path'].'<br />';
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$query3 = Database::query("SELECT path FROM $doc_table AS docs,$prop_table AS props WHERE props.tool='".TOOL_DOCUMENT."' AND docs.id=props.ref AND docs.path LIKE '".$invisible_folders['path']."/%' AND docs.filetype='file' AND props.visibility='1'");
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// Add tem to an array
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while ($files_in_invisible_folder = Database::fetch_assoc($query3)) {
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$files_in_invisible_folder_path[] = $files_in_invisible_folder['path'];
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//echo '<br /><br />files in invisible folders: '.$sys_course_path.$_course['path'].'/document'.$files_in_invisible_folder['path'].' <b>id '.$files_in_invisible_folder['id'].'</b><br />';
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}
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}
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// Compare the array with visible files and the array with files in invisible folders
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// and keep the difference (= all visible files that are not in an invisible folder)
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$files_for_zipfile = diff((array)$all_visible_files_path, (array)$files_in_invisible_folder_path);
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}
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// No invisible folders found, so all visible files can be added to the zipfile
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else {
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$files_for_zipfile = $all_visible_files_path;
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}
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// Add all files in our final array to the zipfile
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//echo("path to remove from file ".$sys_course_path.$_course['path']."/document".$remove_dir.'<br>');
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//echo('<b>FILES FOR ZIP</b><br />');
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//print_r($files_for_zipfile);
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for ($i = 0; $i < count($files_for_zipfile); $i++) {
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$zip_folder->add($sys_course_path.$_course['path'].'/document'.$files_for_zipfile[$i], PCLZIP_OPT_REMOVE_PATH, $sys_course_path.$_course['path'].'/document'.$remove_dir);
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//echo $sys_course_path.$_course['path'].'/document'.$files_for_zipfile[$i].'<br />';
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}
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} // end for other users
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//exit;
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// Launch event
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event_download(($path == '/') ? 'documents.zip (folder)' : basename($path).'.zip (folder)');
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// Start download of created file
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//send_file_to_client($temp_zip_file, basename(empty($_GET['id']) ? 'documents' : $_GET['id']).'.zip');
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$name = ($path == '/') ? 'documents.zip' : basename($path).'.zip';
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DocumentManager::file_send_for_download($temp_zip_file, true, $name);
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@unlink($temp_zip_file);
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exit;
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/**
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* Returns 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();
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$r = 0;
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foreach ($arr1 as & $av) {
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if (!in_array($av, $arr2)) {
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$res[$r] = $av;
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$r++;
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}
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}
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return $res;
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}
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