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See Release Notes

  • Bug fixes for general core bugs in 4.2.x will end 22 April 2024 (12 months).
  • Bug fixes for security issues in 4.2.x will end 7 October 2024 (18 months).
  • PHP version: minimum PHP 8.0.0 Note: minimum PHP version has increased since Moodle 4.1. PHP 8.1.x is supported too.
<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.


/**
 * Base for all file browsing classes.
 *
 * @package    core_files
 * @copyright  2008 Petr Skoda (http://skodak.org)
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

defined('MOODLE_INTERNAL') || die();

/**
 * Base class for things in the tree navigated by {@link file_browser}.
 *
 * @package    core_files
 * @copyright  2008 Petr Skoda (http://skodak.org)
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
abstract class file_info {

< /** @var stdClass File context */
> /** @var context File context */
protected $context; /** @var file_browser File browser instance */ protected $browser; /** * Constructor * * @param file_browser $browser file_browser instance * @param stdClass $context */ public function __construct($browser, $context) { $this->browser = $browser; $this->context = $context; } /** * Returns list of standard virtual file/directory identification. * The difference from stored_file parameters is that null values * are allowed in all fields * * @return array with keys contextid, component, filearea, itemid, filepath and filename */ public function get_params() { return array('contextid' => $this->context->id, 'component' => null, 'filearea' => null, 'itemid' => null, 'filepath' => null, 'filename' => null); } /** * Returns localised visible name. * * @return string */ public abstract function get_visible_name(); /** * Whether or not this is a directory * * @return bool */ public abstract function is_directory(); /** * Returns list of children. * * @return array of file_info instances */ public abstract function get_children(); /** * Builds SQL sub query (WHERE clause) for selecting files with the specified extensions * * If $extensions == '*' (any file), the result is array('', array()) * otherwise the result is something like array('AND filename ...', array(...)) * * @param string|array $extensions - either '*' or array of lowercase extensions, i.e. array('.gif','.jpg') * @param string $prefix prefix for DB table files in the query (empty by default) * @return array of two elements: $sql - sql where clause and $params - array of parameters */ protected function build_search_files_sql($extensions, $prefix = null) { global $DB;
< if (strlen($prefix)) {
> if ($prefix && strlen($prefix)) {
$prefix = $prefix.'.'; } else { $prefix = ''; } $sql = ''; $params = array(); if (is_array($extensions) && !in_array('*', $extensions)) { $likes = array(); $cnt = 0; foreach ($extensions as $ext) { $cnt++; $likes[] = $DB->sql_like($prefix.'filename', ':filename'.$cnt, false); $params['filename'.$cnt] = '%'.$ext; } $sql .= ' AND (' . join(' OR ', $likes) . ')'; } return array($sql, $params); } /** * Returns list of children which are either files matching the specified extensions * or folders that contain at least one such file. * * It is recommended to overwrite this function so it uses a proper SQL * query and does not create unnecessary file_info objects (might require a lot of time * and memory usage on big sites). * * @param string|array $extensions, either '*' or array of lowercase extensions, i.e. array('.gif','.jpg') * @return array of file_info instances */ public function get_non_empty_children($extensions = '*') { $list = $this->get_children(); $nonemptylist = array(); foreach ($list as $fileinfo) { if ($fileinfo->is_directory()) { if ($fileinfo->count_non_empty_children($extensions)) { $nonemptylist[] = $fileinfo; } } else if ($extensions === '*') { $nonemptylist[] = $fileinfo; } else { $filename = $fileinfo->get_visible_name(); $extension = core_text::strtolower(pathinfo($filename, PATHINFO_EXTENSION)); if (!empty($extension) && in_array('.' . $extension, $extensions)) { $nonemptylist[] = $fileinfo; } } } return $nonemptylist; } /** * Returns the number of children which are either files matching the specified extensions * or folders containing at least one such file. * * We usually don't need the exact number of non empty children if it is >=2 (see param $limit) * This function is used by repository_local to evaluate if the folder is empty. But * it also can be used to check if folder has only one subfolder because in some cases * this subfolder can be skipped. * * It is strongly recommended to overwrite this function so it uses a proper SQL * query and does not create file_info objects (later might require a lot of time * and memory usage on big sites). * * @param string|array $extensions, for example '*' or array('.gif','.jpg') * @param int $limit stop counting after at least $limit non-empty children are found * @return int */ public function count_non_empty_children($extensions = '*', $limit = 1) { $list = $this->get_children(); $cnt = 0; // first loop through files foreach ($list as $fileinfo) { if (!$fileinfo->is_directory()) { if ($extensions !== '*') { $filename = $fileinfo->get_visible_name(); $extension = core_text::strtolower(pathinfo($filename, PATHINFO_EXTENSION)); if (empty($extension) || !in_array('.' . $extension, $extensions)) { continue; } } if ((++$cnt) >= $limit) { return $cnt; } } } // now loop through directories foreach ($list as $fileinfo) { if ($fileinfo->is_directory() && $fileinfo->count_non_empty_children($extensions)) { if ((++$cnt) >= $limit) { return $cnt; } } } return $cnt; } /** * Returns parent file_info instance * * @return file_info or null for root */ public abstract function get_parent(); /** * Returns array of url encoded params. * * @return array with numeric keys */ public function get_params_rawencoded() { $params = $this->get_params(); $encoded = array(); $encoded[] = 'contextid=' . $params['contextid']; $encoded[] = 'component=' . $params['component']; $encoded[] = 'filearea=' . $params['filearea']; $encoded[] = 'itemid=' . (is_null($params['itemid']) ? -1 : $params['itemid']); $encoded[] = 'filepath=' . (is_null($params['filepath']) ? '' : rawurlencode($params['filepath'])); $encoded[] = 'filename=' . ((is_null($params['filename']) or $params['filename'] === '.') ? '' : rawurlencode($params['filename'])); return $encoded; } /** * Returns file download url * * @param bool $forcedownload whether or not force download * @param bool $https whether or not force https * @return string url */ public function get_url($forcedownload=false, $https=false) { return null; } /** * Whether or not I can read content of this file or enter directory * * @return bool */ public function is_readable() { return true; } /** * Whether or not new files or directories can be added * * @return bool */ public function is_writable() { return true; } /** * Is this info area and is it "empty"? Are there any files in subfolders? * * This is used mostly in repositories to reduce the * number of empty folders. This method may be very slow, * use with care. * * @return bool */ public function is_empty_area() { return false; } /** * Returns file size in bytes, null for directories * * @return int bytes or null if not known */ public function get_filesize() { return null; } /** * Returns mimetype * * @return string mimetype or null if not known */ public function get_mimetype() { return null; } /** * Returns time created unix timestamp if known * * @return int timestamp or null */ public function get_timecreated() { return null; } /** * Returns time modified unix timestamp if known * * @return int timestamp or null */ public function get_timemodified() { return null; } /** * Returns the license type of the file * @return string license short name or null */ public function get_license() { return null; } /** * Returns the author name of the file * * @return string author name or null */ public function get_author() { return null; } /** * Returns the source of the file * * @return string a source url or null */ public function get_source() { return null; } /** * Returns the sort order of the file * * @return int */ public function get_sortorder() { return 0; } /** * Whether or not this is a external resource * * @return bool */ public function is_external_file() { return false; } /** * Returns file status flag. * * @return int 0 means file OK, anything else is a problem and file can not be used */ public function get_status() { return 0; } /** * Returns the localised human-readable name of the file together with virtual path * * @see file_info_stored::get_readable_fullname() * @return string */ public function get_readable_fullname() { return null; } /** * Create new directory, may throw exception - make sure * params are valid. * * @param string $newdirname name of new directory * @param int $userid id of author, default $USER->id * @return file_info new directory */ public function create_directory($newdirname, $userid = NULL) { return null; } /** * Create new file from string - make sure * params are valid. * * @param string $newfilename name of new file * @param string $content of file * @param int $userid id of author, default $USER->id * @return file_info new file */ public function create_file_from_string($newfilename, $content, $userid = NULL) { return null; } /** * Create new file from pathname - make sure * params are valid. * * @param string $newfilename name of new file * @param string $pathname location of file * @param int $userid id of author, default $USER->id * @return file_info new file */ public function create_file_from_pathname($newfilename, $pathname, $userid = NULL) { return null; } /** * Create new file from stored file - make sure * params are valid. * * @param string $newfilename name of new file * @param int|stored_file $fid id or stored_file of file * @param int $userid id of author, default $USER->id * @return file_info new file */ public function create_file_from_storedfile($newfilename, $fid, $userid = NULL) { return null; } /** * Delete file, make sure file is deletable first. * * @return bool success */ public function delete() { return false; } /** * Copy content of this file to local storage, overriding current file if needed. * * @param array|stdClass $filerecord contains contextid, component, filearea, * itemid, filepath, filename and optionally other attributes of the new file * @return bool success */ public function copy_to_storage($filerecord) { return false; } /** * Copy content of this file to local storage, overriding current file if needed. * * @todo MDL-31068 implement move() rename() unzip() zip() * @param string $pathname real local full file name * @return boolean success */ public function copy_to_pathname($pathname) { return false; } //TODO: following methods are not implemented yet ;-) //public abstract function move(location params); //public abstract function rename(new name); //public abstract function unzip(location params); //public abstract function zip(zip file, file info); }