downloadfolder.inc.php 11 KB

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  1. <?php
  2. /* For licensing terms, see /license.txt */
  3. /**
  4. * Functions and main code for the download folder feature
  5. *
  6. * @package chamilo.document
  7. */
  8. use ChamiloSession as Session;
  9. set_time_limit(0);
  10. require_once '../inc/global.inc.php';
  11. api_protect_course_script();
  12. $sysCoursePath = api_get_path(SYS_COURSE_PATH);
  13. $courseInfo = api_get_course_info();
  14. $courseId = api_get_course_int_id();
  15. $sessionId = api_get_session_id();
  16. $groupId = api_get_group_id();
  17. $courseCode = api_get_course_id();
  18. // Check if folder exists in current course.
  19. $documentInfo = DocumentManager::get_document_data_by_id(
  20. $_GET['id'],
  21. $courseCode,
  22. false,
  23. 0
  24. );
  25. if (!empty($sessionId)) {
  26. /* If no data found and session id exists
  27. try to look the file inside the session */
  28. if (empty($documentInfo)) {
  29. $documentInfo = DocumentManager::get_document_data_by_id(
  30. $_GET['id'],
  31. $courseCode,
  32. false,
  33. $sessionId
  34. );
  35. }
  36. }
  37. $path = $documentInfo['path'];
  38. if (empty($path)) {
  39. $path = '/';
  40. }
  41. // A student should not be able to download a root shared directory
  42. if (($path == '/shared_folder' ||
  43. $path == '/shared_folder_session_' . api_get_session_id()) &&
  44. (!api_is_allowed_to_edit() || !api_is_platform_admin())
  45. ) {
  46. api_not_allowed(true);
  47. exit;
  48. }
  49. // Creating a ZIP file.
  50. $tempZipFile = api_get_path(SYS_ARCHIVE_PATH).api_get_unique_id().".zip";
  51. $zip = new PclZip($tempZipFile);
  52. $doc_table = Database::get_course_table(TABLE_DOCUMENT);
  53. $prop_table = Database::get_course_table(TABLE_ITEM_PROPERTY);
  54. // We need this path to clean it out of the zip file
  55. // I'm not using dir name as it gives too much problems (cfr.)
  56. $remove_dir = ($path != '/') ? substr($path, 0, strlen($path) - strlen(basename($path))) : '/';
  57. // Put the files in the zip
  58. // 2 possibilities: Admins get all files and folders in the selected folder (except for the deleted ones)
  59. // Normal users get only visible files that are in visible folders
  60. function fixDocumentNameCallback($p_event, &$p_header)
  61. {
  62. global $remove_dir;
  63. $files = Session::read('doc_files_to_download');
  64. $storedFile = $remove_dir.$p_header['stored_filename'];
  65. if (!isset($files[$storedFile])) {
  66. return 0;
  67. }
  68. $documentData = $files[$storedFile];
  69. $documentNameFixed = DocumentManager::undoFixDocumentName(
  70. $documentData['path'],
  71. $documentData['c_id'],
  72. $documentData['session_id'],
  73. $documentData['to_group_id']
  74. );
  75. // Changes file.phps to file.php
  76. $basename = basename($documentNameFixed);
  77. $basenamePHPFixed = str_replace('.phps', '.php', $basename);
  78. $documentNameFixed = str_replace($basename, $basenamePHPFixed, $basenamePHPFixed);
  79. $p_header['stored_filename'] = $documentNameFixed;
  80. return 1;
  81. }
  82. $groupCondition = " props.to_group_id = ".$groupId;
  83. if (empty($groupId)) {
  84. $groupCondition = " (props.to_group_id = 0 OR props.to_group_id IS NULL ) ";
  85. }
  86. // Admins are allowed to download invisible files
  87. if (api_is_allowed_to_edit()) {
  88. // Set the path that will be used in the query
  89. if ($path == '/') {
  90. $querypath = ''; // To prevent ...path LIKE '//%'... in query
  91. } else {
  92. $querypath = $path;
  93. }
  94. $querypath = Database::escape_string($querypath);
  95. // Search for all files that are not deleted => visibility != 2
  96. $sql = "SELECT
  97. path,
  98. docs.session_id,
  99. docs.id,
  100. props.to_group_id,
  101. docs.c_id
  102. FROM $doc_table AS docs
  103. INNER JOIN $prop_table AS props
  104. ON
  105. docs.id = props.ref AND
  106. docs.c_id = props.c_id
  107. WHERE
  108. props.tool ='".TOOL_DOCUMENT."' AND
  109. docs.path LIKE '".$querypath."/%' AND
  110. docs.filetype = 'file' AND
  111. props.visibility <> '2' AND
  112. $groupCondition AND
  113. (props.session_id IN ('0', '$sessionId') OR props.session_id IS NULL) AND
  114. docs.c_id = ".$courseId." ";
  115. $sql.= DocumentManager::getSessionFolderFilters($querypath, $sessionId);
  116. $result = Database::query($sql);
  117. $files = array();
  118. while ($row = Database::fetch_array($result)) {
  119. $files[$row['path']] = $row;
  120. }
  121. Session::write('doc_files_to_download', $files);
  122. foreach ($files as $not_deleted_file) {
  123. // Filtering folders and
  124. if (strpos($not_deleted_file['path'], 'chat_files') > 0 ||
  125. strpos($not_deleted_file['path'], 'shared_folder') > 0
  126. ) {
  127. if (!empty($sessionId)) {
  128. if ($not_deleted_file['session_id'] != $sessionId) {
  129. continue;
  130. }
  131. }
  132. }
  133. $zip->add(
  134. $sysCoursePath.$courseInfo['path'].'/document'.$not_deleted_file['path'],
  135. PCLZIP_OPT_REMOVE_PATH,
  136. $sysCoursePath.$courseInfo['path'].'/document'.$remove_dir,
  137. PCLZIP_CB_PRE_ADD,
  138. 'fixDocumentNameCallback'
  139. );
  140. }
  141. Session::erase('doc_files_to_download');
  142. } else {
  143. // For other users, we need to create a zip file with only visible files and folders
  144. if ($path == '/') {
  145. $querypath = ''; // To prevent ...path LIKE '//%'... in query
  146. } else {
  147. $querypath = $path;
  148. }
  149. /* A big problem: Visible files that are in a hidden folder are
  150. included when we do a query for visiblity='v'
  151. So... I do it in a couple of steps:
  152. 1st: Get all files that are visible in the given path
  153. */
  154. $querypath = Database::escape_string($querypath);
  155. $sql = "SELECT path, session_id, docs.id, props.to_group_id, docs.c_id
  156. FROM $doc_table AS docs
  157. INNER JOIN $prop_table AS props
  158. ON
  159. docs.id = props.ref AND
  160. docs.c_id = props.c_id
  161. WHERE
  162. docs.c_id = $courseId AND
  163. props.tool = '".TOOL_DOCUMENT."' AND
  164. docs.path LIKE '".$querypath."/%' AND
  165. props.visibility = '1' AND
  166. docs.filetype = 'file' AND
  167. (props.session_id IN ('0', '$sessionId') OR props.session_id IS NULL) AND
  168. $groupCondition
  169. ";
  170. $sql.= DocumentManager::getSessionFolderFilters($querypath, $sessionId);
  171. $result = Database::query($sql);
  172. $files = array();
  173. // Add them to an array
  174. while ($all_visible_files = Database::fetch_assoc($result)) {
  175. if (strpos($all_visible_files['path'], 'chat_files') > 0 ||
  176. strpos($all_visible_files['path'], 'shared_folder') > 0
  177. ) {
  178. if (!empty($sessionId)) {
  179. if ($all_visible_files['session_id'] != $sessionId) {
  180. continue;
  181. }
  182. }
  183. }
  184. $all_visible_files_path[] = $all_visible_files['path'];
  185. $files[$all_visible_files['path']] = $all_visible_files;
  186. }
  187. // 2nd: Get all folders that are invisible in the given path
  188. $sql = "SELECT path, session_id, docs.id, props.to_group_id, docs.c_id
  189. FROM $doc_table AS docs INNER JOIN $prop_table AS props
  190. ON
  191. docs.id = props.ref AND
  192. docs.c_id = props.c_id
  193. WHERE
  194. docs.c_id = $courseId AND
  195. props.tool = '".TOOL_DOCUMENT."' AND
  196. docs.path LIKE '".$querypath."/%' AND
  197. props.visibility <> '1' AND
  198. (props.session_id IN ('0', '$sessionId') OR props.session_id IS NULL) AND
  199. docs.filetype = 'folder'";
  200. $query2 = Database::query($sql);
  201. // If we get invisible folders, we have to filter out these results from all visible files we found
  202. if (Database::num_rows($query2) > 0) {
  203. $files = array();
  204. // Add item to an array
  205. while ($invisible_folders = Database::fetch_assoc($query2)) {
  206. //3rd: Get all files that are in the found invisible folder (these are "invisible" too)
  207. $sql = "SELECT path, docs.id, props.to_group_id, docs.c_id
  208. FROM $doc_table AS docs
  209. INNER JOIN $prop_table AS props
  210. ON
  211. docs.id = props.ref AND
  212. docs.c_id = props.c_id
  213. WHERE
  214. docs.c_id = $courseId AND
  215. props.tool ='".TOOL_DOCUMENT."' AND
  216. docs.path LIKE '".$invisible_folders['path']."/%' AND
  217. docs.filetype ='file' AND
  218. (props.session_id IN ('0', '$sessionId') OR props.session_id IS NULL) AND
  219. props.visibility ='1'";
  220. $query3 = Database::query($sql);
  221. // Add tem to an array
  222. while ($files_in_invisible_folder = Database::fetch_assoc($query3)) {
  223. $files_in_invisible_folder_path[] = $files_in_invisible_folder['path'];
  224. $files[$files_in_invisible_folder['path']] = $files_in_invisible_folder;
  225. }
  226. }
  227. // Compare the array with visible files and the array with files in invisible folders
  228. // and keep the difference (= all visible files that are not in an invisible folder)
  229. $files_for_zipfile = diff(
  230. (array) $all_visible_files_path,
  231. (array) $files_in_invisible_folder_path
  232. );
  233. } else {
  234. // No invisible folders found, so all visible files can be added to the zipfile
  235. $files_for_zipfile = $all_visible_files_path;
  236. }
  237. Session::write('doc_files_to_download', $files);
  238. // Add all files in our final array to the zipfile
  239. for ($i = 0; $i < count($files_for_zipfile); $i++) {
  240. $zip->add(
  241. $sysCoursePath . $courseInfo['path'] . '/document' . $files_for_zipfile[$i],
  242. PCLZIP_OPT_REMOVE_PATH,
  243. $sysCoursePath . $courseInfo['path'] . '/document' . $remove_dir,
  244. PCLZIP_CB_PRE_ADD,
  245. 'fixDocumentNameCallback'
  246. );
  247. }
  248. Session::erase('doc_files_to_download');
  249. }
  250. // Launch event
  251. Event::event_download(($path == '/') ? 'documents.zip (folder)' : basename($path).'.zip (folder)');
  252. // Start download of created file
  253. $name = ($path == '/') ? 'documents.zip' : $documentInfo['title'].'.zip';
  254. if (Security::check_abs_path($tempZipFile, api_get_path(SYS_ARCHIVE_PATH))) {
  255. $result = DocumentManager::file_send_for_download($tempZipFile, true, $name);
  256. @unlink($tempZipFile);
  257. exit;
  258. } else {
  259. api_not_allowed(true);
  260. }
  261. /**
  262. * Returns the difference between two arrays, as an array of those key/values
  263. * Use this as array_diff doesn't give the
  264. *
  265. * @param array $arr1 first array
  266. * @param array $arr2 second array
  267. *
  268. * @return array difference between the two arrays
  269. */
  270. function diff($arr1, $arr2)
  271. {
  272. $res = array();
  273. $r = 0;
  274. foreach ($arr1 as & $av) {
  275. if (!in_array($av, $arr2)) {
  276. $res[$r] = $av;
  277. $r++;
  278. }
  279. }
  280. return $res;
  281. }