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188 lines
8.1 KiB
188 lines
8.1 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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/**
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* Code
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*/
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set_time_limit(0);
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require_once '../inc/global.inc.php';
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api_protect_course_script();
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$document_data = DocumentManager::get_document_data_by_id($_GET['id'], api_get_course_id());
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$path = $document_data['path'];
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$sys_course_path = api_get_path(SYS_COURSE_PATH);
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if (empty($path)) {
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$path = '/';
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}
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if (empty($document_data)) {
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//api_not_allowed();
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}
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//a student should not be able to download a root shared directory
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if (($path == '/shared_folder' || $path=='/shared_folder_session_'.api_get_session_id()) && (!api_is_allowed_to_edit() || !api_is_platform_admin())){
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echo '<div align="center">';
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Display::display_error_message(get_lang('NotAllowedClickBack'));
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echo '</div>';
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exit;
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}
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//zip library for creation of the zipfile
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require api_get_path(LIBRARY_PATH).'pclzip/pclzip.lib.php';
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//Creating a ZIP file
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$temp_zip_file = api_get_path(SYS_ARCHIVE_PATH).api_get_unique_id().".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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$course_id = api_get_course_int_id();
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$session_id = api_get_session_id();
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//$to_group_id = api_get_group_id(); variable loaded in document.php
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// We need this path to clean it out of the zip file
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// I'm not using dirname as it gives too much problems (cfr.)
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$remove_dir = ($path != '/') ? substr($path, 0, strlen($path) - strlen(basename($path))) : '/';
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// 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 (api_is_allowed_to_edit()) {
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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 = $path;
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}
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$querypath = Database::escape_string($querypath);
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// Search for all files that are not deleted => visibility != 2
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$sql = "SELECT path FROM $doc_table AS docs, $prop_table AS props
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WHERE props.tool ='".TOOL_DOCUMENT."' AND
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docs.id = props.ref AND
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docs.path LIKE '".$querypath."/%' AND
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docs.filetype = 'file' AND props.visibility<>'2' AND
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props.to_group_id = ".$to_group_id." AND
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props.c_id = ".$course_id." AND
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props.id_session IN ('0', '$session_id') AND
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docs.c_id = ".$course_id." ";
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$query = Database::query($sql);
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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'.$remove_dir);
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}
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} else {
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// For other users, we need to create a zipfile with only visible files and folders
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if ($path == '/') {
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$querypath = ''; // To prevent ...path LIKE '//%'... in query
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} else {
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$querypath = $path;
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}
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// A big problem: Visible files that are in a hidden folder are included when we do a query for visiblity='v'
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// So... I do it in a couple of steps:
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// 1st: Get all files that are visible in the given path
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$querypath = Database::escape_string($querypath);
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$query = Database::query("SELECT path FROM $doc_table AS docs, $prop_table AS props
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WHERE docs.c_id = $course_id AND
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props.c_id = $course_id AND
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props.tool = '".TOOL_DOCUMENT."' AND
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docs.id = props.ref AND
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docs.path LIKE '".$querypath."/%' AND
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props.visibility = '1' AND
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docs.filetype = 'file' AND
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props.id_session IN ('0', '$session_id') AND
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props.to_group_id = ".$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[] = $all_visible_files['path'];
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}
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// 2nd: Get all folders that are invisible in the given path
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$query2 = Database::query("SELECT path FROM $doc_table AS docs, $prop_table AS props
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WHERE docs.c_id = $course_id AND
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props.c_id = $course_id AND
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props.tool = '".TOOL_DOCUMENT."' AND
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docs.id = props.ref AND
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docs.path LIKE '".$querypath."/%' AND
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props.visibility <> '1' AND
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props.id_session IN ('0', '$session_id') AND
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docs.filetype = 'folder'");
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// If we get invisible folders, we have to filter out these results from all visible files we found
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if (Database::num_rows($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
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WHERE docs.c_id = $course_id AND
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props.c_id = $course_id AND
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props.tool ='".TOOL_DOCUMENT."' AND
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docs.id = props.ref AND
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docs.path LIKE '".$invisible_folders['path']."/%' AND
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docs.filetype ='file' AND
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props.id_session IN ('0', '$session_id') AND
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props.visibility ='1'");
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// Add tem to an array
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while ($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 = $all_visible_files_path;
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}
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// Add all files in our final array to the zipfile
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for ($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'.$remove_dir);
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}
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} // end for other users
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// Launch event
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event_download(($path == '/') ? 'documents.zip (folder)' : basename($path).'.zip (folder)');
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// Start download of created file
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$name = ($path == '/') ? 'documents.zip' : $document_data['title'].'.zip';
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if (Security::check_abs_path($temp_zip_file, api_get_path(SYS_ARCHIVE_PATH))) {
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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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/**
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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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