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1133 lines
38 KiB
1133 lines
38 KiB
<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Definition of a class stored_file.
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*
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* @package core_files
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* @copyright 2008 Petr Skoda {@link http://skodak.org}
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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defined('MOODLE_INTERNAL') || die();
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require_once($CFG->dirroot . '/lib/filestorage/file_progress.php');
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require_once($CFG->dirroot . '/lib/filestorage/file_system.php');
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/**
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* Class representing local files stored in a sha1 file pool.
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*
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* Since Moodle 2.0 file contents are stored in sha1 pool and
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* all other file information is stored in new "files" database table.
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*
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* @package core_files
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* @category files
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* @copyright 2008 Petr Skoda {@link http://skodak.org}
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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* @since Moodle 2.0
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*/
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class stored_file {
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/** @var file_storage file storage pool instance */
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private $fs;
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/** @var stdClass record from the files table left join files_reference table */
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private $file_record;
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/** @var repository repository plugin instance */
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private $repository;
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/** @var file_system filesystem instance */
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private $filesystem;
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/**
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* @var int Indicates a file handle of the type returned by fopen.
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*/
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const FILE_HANDLE_FOPEN = 0;
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/**
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* @var int Indicates a file handle of the type returned by gzopen.
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*/
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const FILE_HANDLE_GZOPEN = 1;
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/**
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* Constructor, this constructor should be called ONLY from the file_storage class!
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*
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* @param file_storage $fs file storage instance
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* @param stdClass $file_record description of file
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* @param string $deprecated
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*/
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public function __construct(file_storage $fs, stdClass $file_record, $deprecated = null) {
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global $DB, $CFG;
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$this->fs = $fs;
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$this->file_record = clone($file_record); // prevent modifications
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if (!empty($file_record->repositoryid)) {
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require_once("$CFG->dirroot/repository/lib.php");
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$this->repository = repository::get_repository_by_id($file_record->repositoryid, SYSCONTEXTID);
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if ($this->repository->supported_returntypes() & FILE_REFERENCE != FILE_REFERENCE) {
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// Repository cannot do file reference.
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throw new moodle_exception('error');
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}
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} else {
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$this->repository = null;
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}
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// make sure all reference fields exist in file_record even when it is not a reference
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foreach (array('referencelastsync', 'referencefileid', 'reference', 'repositoryid') as $key) {
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if (empty($this->file_record->$key)) {
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$this->file_record->$key = null;
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}
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}
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$this->filesystem = $fs->get_file_system();
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}
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/**
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* Magic method, called during serialization.
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*
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* @return array
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*/
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public function __sleep() {
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// We only ever want the file_record saved, not the file_storage object.
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return ['file_record'];
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}
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/**
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* Magic method, called during unserialization.
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*/
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public function __wakeup() {
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// Recreate our stored_file based on the file_record, and using file storage retrieved the correct way.
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$this->__construct(get_file_storage(), $this->file_record);
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}
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/**
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* Whether or not this is a external resource
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*
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* @return bool
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*/
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public function is_external_file() {
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return !empty($this->repository);
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}
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/**
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* Whether or not this is a controlled link. Note that repositories cannot support FILE_REFERENCE and FILE_CONTROLLED_LINK.
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*
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* @return bool
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*/
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public function is_controlled_link() {
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return $this->is_external_file() && $this->repository->supported_returntypes() & FILE_CONTROLLED_LINK;
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}
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/**
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* Update some file record fields
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* NOTE: Must remain protected
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*
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* @param stdClass $dataobject
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*/
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protected function update($dataobject) {
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global $DB;
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$updatereferencesneeded = false;
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$updatemimetype = false;
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$keys = array_keys((array)$this->file_record);
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$filepreupdate = clone($this->file_record);
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foreach ($dataobject as $field => $value) {
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if (in_array($field, $keys)) {
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if ($field == 'contextid' and (!is_number($value) or $value < 1)) {
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throw new file_exception('storedfileproblem', 'Invalid contextid');
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}
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if ($field == 'component') {
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$value = clean_param($value, PARAM_COMPONENT);
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if (empty($value)) {
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throw new file_exception('storedfileproblem', 'Invalid component');
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}
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}
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if ($field == 'filearea') {
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$value = clean_param($value, PARAM_AREA);
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if (empty($value)) {
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throw new file_exception('storedfileproblem', 'Invalid filearea');
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}
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}
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if ($field == 'itemid' and (!is_number($value) or $value < 0)) {
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throw new file_exception('storedfileproblem', 'Invalid itemid');
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}
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if ($field == 'filepath') {
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$value = clean_param($value, PARAM_PATH);
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if (strpos($value, '/') !== 0 or strrpos($value, '/') !== strlen($value)-1) {
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// path must start and end with '/'
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throw new file_exception('storedfileproblem', 'Invalid file path');
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}
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}
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if ($field == 'filename') {
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// folder has filename == '.', so we pass this
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if ($value != '.') {
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$value = clean_param($value, PARAM_FILE);
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}
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if ($value === '') {
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throw new file_exception('storedfileproblem', 'Invalid file name');
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}
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}
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if ($field === 'timecreated' or $field === 'timemodified') {
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if (!is_number($value)) {
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throw new file_exception('storedfileproblem', 'Invalid timestamp');
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}
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if ($value < 0) {
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$value = 0;
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}
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}
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if ($field === 'referencefileid') {
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if (!is_null($value) and !is_number($value)) {
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throw new file_exception('storedfileproblem', 'Invalid reference info');
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}
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}
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if (($field == 'contenthash' || $field == 'filesize') && $this->file_record->$field != $value) {
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$updatereferencesneeded = true;
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}
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if ($updatereferencesneeded || ($field === 'filename' && $this->file_record->filename != $value)) {
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$updatemimetype = true;
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}
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// adding the field
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$this->file_record->$field = $value;
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} else {
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throw new coding_exception("Invalid field name, $field doesn't exist in file record");
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}
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}
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// Validate mimetype field
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if ($updatemimetype) {
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$mimetype = $this->filesystem->mimetype_from_storedfile($this);
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$this->file_record->mimetype = $mimetype;
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}
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$DB->update_record('files', $this->file_record);
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if ($updatereferencesneeded) {
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// Either filesize or contenthash of this file have changed. Update all files that reference to it.
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$this->fs->update_references_to_storedfile($this);
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}
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// Callback for file update.
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if (!$this->is_directory()) {
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if ($pluginsfunction = get_plugins_with_function('after_file_updated')) {
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foreach ($pluginsfunction as $plugintype => $plugins) {
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foreach ($plugins as $pluginfunction) {
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$pluginfunction($this->file_record, $filepreupdate);
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}
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}
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}
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}
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}
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/**
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* Rename filename
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*
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* @param string $filepath file path
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* @param string $filename file name
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*/
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public function rename($filepath, $filename) {
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if ($this->fs->file_exists($this->get_contextid(), $this->get_component(), $this->get_filearea(), $this->get_itemid(), $filepath, $filename)) {
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$a = new stdClass();
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$a->contextid = $this->get_contextid();
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$a->component = $this->get_component();
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$a->filearea = $this->get_filearea();
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$a->itemid = $this->get_itemid();
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$a->filepath = $filepath;
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$a->filename = $filename;
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throw new file_exception('storedfilenotcreated', $a, 'file exists, cannot rename');
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}
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$filerecord = new stdClass;
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$filerecord->filepath = $filepath;
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$filerecord->filename = $filename;
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// populate the pathname hash
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$filerecord->pathnamehash = $this->fs->get_pathname_hash($this->file_record->contextid, $this->file_record->component, $this->file_record->filearea, $this->file_record->itemid, $filepath, $filename);
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$this->update($filerecord);
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}
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/**
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* Function stored_file::replace_content_with() is deprecated. Please use stored_file::replace_file_with()
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*
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* @deprecated since Moodle 2.6 MDL-42016 - please do not use this function any more.
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* @see stored_file::replace_file_with()
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*/
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public function replace_content_with(stored_file $storedfile) {
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throw new coding_exception('Function stored_file::replace_content_with() can not be used any more . ' .
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'Please use stored_file::replace_file_with()');
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}
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/**
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* Replaces the fields that might have changed when file was overriden in filepicker:
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* reference, contenthash, filesize, userid
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*
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* Note that field 'source' must be updated separately because
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* it has different format for draft and non-draft areas and
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* this function will usually be used to replace non-draft area
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* file with draft area file.
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*
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* @param stored_file $newfile
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* @throws coding_exception
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*/
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public function replace_file_with(stored_file $newfile) {
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if ($newfile->get_referencefileid() &&
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$this->fs->get_references_count_by_storedfile($this)) {
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// The new file is a reference.
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// The current file has other local files referencing to it.
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// Double reference is not allowed.
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throw new moodle_exception('errordoublereference', 'repository');
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}
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$filerecord = new stdClass;
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if ($this->filesystem->is_file_readable_remotely_by_storedfile($newfile)) {
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$contenthash = $newfile->get_contenthash();
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$filerecord->contenthash = $contenthash;
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} else {
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throw new file_exception('storedfileproblem', 'Invalid contenthash, content must be already in filepool', $contenthash);
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}
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$filerecord->filesize = $newfile->get_filesize();
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$filerecord->referencefileid = $newfile->get_referencefileid();
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$filerecord->userid = $newfile->get_userid();
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$oldcontenthash = $this->get_contenthash();
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$this->update($filerecord);
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$this->filesystem->remove_file($oldcontenthash);
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}
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/**
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* Unlink the stored file from the referenced file
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*
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* This methods destroys the link to the record in files_reference table. This effectively
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* turns the stored file from being an alias to a plain copy. However, the caller has
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* to make sure that the actual file's content has beed synced prior to calling this method.
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*/
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public function delete_reference() {
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global $DB;
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if (!$this->is_external_file()) {
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throw new coding_exception('An attempt to unlink a non-reference file.');
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}
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$transaction = $DB->start_delegated_transaction();
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// Are we the only one referring to the original file? If so, delete the
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// referenced file record. Note we do not use file_storage::search_references_count()
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// here because we want to count draft files too and we are at a bit lower access level here.
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$countlinks = $DB->count_records('files',
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array('referencefileid' => $this->file_record->referencefileid));
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if ($countlinks == 1) {
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$DB->delete_records('files_reference', array('id' => $this->file_record->referencefileid));
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}
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// Update the underlying record in the database.
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$update = new stdClass();
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$update->referencefileid = null;
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$this->update($update);
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$transaction->allow_commit();
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// Update our properties and the record in the memory.
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$this->repository = null;
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$this->file_record->repositoryid = null;
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$this->file_record->reference = null;
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$this->file_record->referencefileid = null;
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$this->file_record->referencelastsync = null;
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}
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/**
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* Is this a directory?
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*
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* Directories are only emulated, internally they are stored as empty
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* files with a "." instead of name - this means empty directory contains
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* exactly one empty file with name dot.
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*
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* @return bool true means directory, false means file
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*/
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public function is_directory() {
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return ($this->file_record->filename === '.');
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}
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/**
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* Delete file from files table.
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*
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* The content of files stored in sha1 pool is reclaimed
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* later - the occupied disk space is reclaimed much later.
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*
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* @return bool always true or exception if error occurred
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*/
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public function delete() {
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global $DB;
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if ($this->is_directory()) {
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// Directories can not be referenced, just delete the record.
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$DB->delete_records('files', array('id'=>$this->file_record->id));
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} else {
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$transaction = $DB->start_delegated_transaction();
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// If there are other files referring to this file, convert them to copies.
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if ($files = $this->fs->get_references_by_storedfile($this)) {
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foreach ($files as $file) {
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$this->fs->import_external_file($file);
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}
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}
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// If this file is a reference (alias) to another file, unlink it first.
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if ($this->is_external_file()) {
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$this->delete_reference();
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}
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// Now delete the file record.
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$DB->delete_records('files', array('id'=>$this->file_record->id));
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$transaction->allow_commit();
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if (!$this->is_directory()) {
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// Callback for file deletion.
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if ($pluginsfunction = get_plugins_with_function('after_file_deleted')) {
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foreach ($pluginsfunction as $plugintype => $plugins) {
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foreach ($plugins as $pluginfunction) {
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$pluginfunction($this->file_record);
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}
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}
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}
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}
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}
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// Move pool file to trash if content not needed any more.
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$this->filesystem->remove_file($this->file_record->contenthash);
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return true; // BC only
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}
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/**
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* adds this file path to a curl request (POST only)
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*
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* @param curl $curlrequest the curl request object
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* @param string $key what key to use in the POST request
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* @return void
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*/
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public function add_to_curl_request(&$curlrequest, $key) {
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return $this->filesystem->add_to_curl_request($this, $curlrequest, $key);
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}
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/**
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* Returns file handle - read only mode, no writing allowed into pool files!
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*
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* When you want to modify a file, create a new file and delete the old one.
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*
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* @param int $type Type of file handle (FILE_HANDLE_xx constant)
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* @return resource file handle
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*/
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public function get_content_file_handle($type = self::FILE_HANDLE_FOPEN) {
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return $this->filesystem->get_content_file_handle($this, $type);
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}
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/**
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* Dumps file content to page.
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*/
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public function readfile() {
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return $this->filesystem->readfile($this);
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}
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/**
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* Returns file content as string.
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*
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* @return string content
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*/
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public function get_content() {
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return $this->filesystem->get_content($this);
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}
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/**
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* Copy content of file to given pathname.
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*
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* @param string $pathname real path to the new file
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* @return bool success
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*/
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public function copy_content_to($pathname) {
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return $this->filesystem->copy_content_from_storedfile($this, $pathname);
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}
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/**
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* Copy content of file to temporary folder and returns file path
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*
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* @param string $dir name of the temporary directory
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* @param string $fileprefix prefix of temporary file.
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* @return string|bool path of temporary file or false.
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*/
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public function copy_content_to_temp($dir = 'files', $fileprefix = 'tempup_') {
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$tempfile = false;
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if (!$dir = make_temp_directory($dir)) {
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return false;
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}
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if (!$tempfile = tempnam($dir, $fileprefix)) {
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return false;
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}
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if (!$this->copy_content_to($tempfile)) {
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// something went wrong
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@unlink($tempfile);
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return false;
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}
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return $tempfile;
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}
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/**
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* List contents of archive.
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*
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* @param file_packer $packer file packer instance
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* @return array of file infos
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*/
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public function list_files(file_packer $packer) {
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return $this->filesystem->list_files($this, $packer);
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}
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/**
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* Extract file to given file path (real OS filesystem), existing files are overwritten.
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*
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* @param file_packer $packer file packer instance
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* @param string $pathname target directory
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* @param file_progress $progress Progress indicator callback or null if not required
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* @return array|bool list of processed files; false if error
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*/
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public function extract_to_pathname(file_packer $packer, $pathname,
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file_progress $progress = null) {
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return $this->filesystem->extract_to_pathname($this, $packer, $pathname, $progress);
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}
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/**
|
|
* Extract file to given file path (real OS filesystem), existing files are overwritten.
|
|
*
|
|
* @param file_packer $packer file packer instance
|
|
* @param int $contextid context ID
|
|
* @param string $component component
|
|
* @param string $filearea file area
|
|
* @param int $itemid item ID
|
|
* @param string $pathbase path base
|
|
* @param int $userid user ID
|
|
* @param file_progress $progress Progress indicator callback or null if not required
|
|
* @return array|bool list of processed files; false if error
|
|
*/
|
|
public function extract_to_storage(file_packer $packer, $contextid,
|
|
$component, $filearea, $itemid, $pathbase, $userid = null, file_progress $progress = null) {
|
|
|
|
return $this->filesystem->extract_to_storage($this, $packer, $contextid, $component, $filearea,
|
|
$itemid, $pathbase, $userid, $progress);
|
|
}
|
|
|
|
/**
|
|
* Add file/directory into archive.
|
|
*
|
|
* @param file_archive $filearch file archive instance
|
|
* @param string $archivepath pathname in archive
|
|
* @return bool success
|
|
*/
|
|
public function archive_file(file_archive $filearch, $archivepath) {
|
|
if ($this->repository) {
|
|
$this->sync_external_file();
|
|
if ($this->compare_to_string('')) {
|
|
// This file is not stored locally - attempt to retrieve it from the repository.
|
|
// This may happen if the repository deliberately does not fetch files, or if there is a failure with the sync.
|
|
$fileinfo = $this->repository->get_file($this->get_reference());
|
|
if (isset($fileinfo['path'])) {
|
|
return $filearch->add_file_from_pathname($archivepath, $fileinfo['path']);
|
|
}
|
|
}
|
|
}
|
|
|
|
return $this->filesystem->add_storedfile_to_archive($this, $filearch, $archivepath);
|
|
}
|
|
|
|
/**
|
|
* Returns information about image,
|
|
* information is determined from the file content
|
|
*
|
|
* @return mixed array with width, height and mimetype; false if not an image
|
|
*/
|
|
public function get_imageinfo() {
|
|
return $this->filesystem->get_imageinfo($this);
|
|
}
|
|
|
|
/**
|
|
* Verifies the file is a valid web image - gif, png and jpeg only.
|
|
*
|
|
* It should be ok to serve this image from server without any other security workarounds.
|
|
*
|
|
* @return bool true if file ok
|
|
*/
|
|
public function is_valid_image() {
|
|
$mimetype = $this->get_mimetype();
|
|
if (!file_mimetype_in_typegroup($mimetype, 'web_image')) {
|
|
return false;
|
|
}
|
|
if (!$info = $this->get_imageinfo()) {
|
|
return false;
|
|
}
|
|
if ($info['mimetype'] !== $mimetype) {
|
|
return false;
|
|
}
|
|
// ok, GD likes this image
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Returns parent directory, creates missing parents if needed.
|
|
*
|
|
* @return stored_file
|
|
*/
|
|
public function get_parent_directory() {
|
|
if ($this->file_record->filepath === '/' and $this->file_record->filename === '.') {
|
|
//root dir does not have parent
|
|
return null;
|
|
}
|
|
|
|
if ($this->file_record->filename !== '.') {
|
|
return $this->fs->create_directory($this->file_record->contextid, $this->file_record->component, $this->file_record->filearea, $this->file_record->itemid, $this->file_record->filepath);
|
|
}
|
|
|
|
$filepath = $this->file_record->filepath;
|
|
$filepath = trim($filepath, '/');
|
|
$dirs = explode('/', $filepath);
|
|
array_pop($dirs);
|
|
$filepath = implode('/', $dirs);
|
|
$filepath = ($filepath === '') ? '/' : "/$filepath/";
|
|
|
|
return $this->fs->create_directory($this->file_record->contextid, $this->file_record->component, $this->file_record->filearea, $this->file_record->itemid, $filepath);
|
|
}
|
|
|
|
/**
|
|
* Set synchronised content from file.
|
|
*
|
|
* @param string $path Path to the file.
|
|
*/
|
|
public function set_synchronised_content_from_file($path) {
|
|
$this->fs->synchronise_stored_file_from_file($this, $path, $this->file_record);
|
|
}
|
|
|
|
/**
|
|
* Set synchronised content from content.
|
|
*
|
|
* @param string $content File content.
|
|
*/
|
|
public function set_synchronised_content_from_string($content) {
|
|
$this->fs->synchronise_stored_file_from_string($this, $content, $this->file_record);
|
|
}
|
|
|
|
/**
|
|
* Synchronize file if it is a reference and needs synchronizing
|
|
*
|
|
* Updates contenthash and filesize
|
|
*/
|
|
public function sync_external_file() {
|
|
if (!empty($this->repository)) {
|
|
$this->repository->sync_reference($this);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns context id of the file
|
|
*
|
|
* @return int context id
|
|
*/
|
|
public function get_contextid() {
|
|
return $this->file_record->contextid;
|
|
}
|
|
|
|
/**
|
|
* Returns component name - this is the owner of the areas,
|
|
* nothing else is allowed to read or modify the files directly!!
|
|
*
|
|
* @return string
|
|
*/
|
|
public function get_component() {
|
|
return $this->file_record->component;
|
|
}
|
|
|
|
/**
|
|
* Returns file area name, this divides files of one component into groups with different access control.
|
|
* All files in one area have the same access control.
|
|
*
|
|
* @return string
|
|
*/
|
|
public function get_filearea() {
|
|
return $this->file_record->filearea;
|
|
}
|
|
|
|
/**
|
|
* Returns returns item id of file.
|
|
*
|
|
* @return int
|
|
*/
|
|
public function get_itemid() {
|
|
return $this->file_record->itemid;
|
|
}
|
|
|
|
/**
|
|
* Returns file path - starts and ends with /, \ are not allowed.
|
|
*
|
|
* @return string
|
|
*/
|
|
public function get_filepath() {
|
|
return $this->file_record->filepath;
|
|
}
|
|
|
|
/**
|
|
* Returns file name or '.' in case of directories.
|
|
*
|
|
* @return string
|
|
*/
|
|
public function get_filename() {
|
|
return $this->file_record->filename;
|
|
}
|
|
|
|
/**
|
|
* Returns id of user who created the file.
|
|
*
|
|
* @return int
|
|
*/
|
|
public function get_userid() {
|
|
return $this->file_record->userid;
|
|
}
|
|
|
|
/**
|
|
* Returns the size of file in bytes.
|
|
*
|
|
* @return int bytes
|
|
*/
|
|
public function get_filesize() {
|
|
$this->sync_external_file();
|
|
return $this->file_record->filesize;
|
|
}
|
|
|
|
/**
|
|
* Function stored_file::set_filesize() is deprecated. Please use stored_file::replace_file_with
|
|
*
|
|
* @deprecated since Moodle 2.6 MDL-42016 - please do not use this function any more.
|
|
* @see stored_file::replace_file_with()
|
|
*/
|
|
public function set_filesize($filesize) {
|
|
throw new coding_exception('Function stored_file::set_filesize() can not be used any more. ' .
|
|
'Please use stored_file::replace_file_with()');
|
|
}
|
|
|
|
/**
|
|
* Returns mime type of file.
|
|
*
|
|
* @return string
|
|
*/
|
|
public function get_mimetype() {
|
|
return $this->file_record->mimetype;
|
|
}
|
|
|
|
/**
|
|
* Returns unix timestamp of file creation date.
|
|
*
|
|
* @return int
|
|
*/
|
|
public function get_timecreated() {
|
|
return $this->file_record->timecreated;
|
|
}
|
|
|
|
/**
|
|
* Returns unix timestamp of last file modification.
|
|
*
|
|
* @return int
|
|
*/
|
|
public function get_timemodified() {
|
|
$this->sync_external_file();
|
|
return $this->file_record->timemodified;
|
|
}
|
|
|
|
/**
|
|
* set timemodified
|
|
*
|
|
* @param int $timemodified
|
|
*/
|
|
public function set_timemodified($timemodified) {
|
|
$filerecord = new stdClass;
|
|
$filerecord->timemodified = $timemodified;
|
|
$this->update($filerecord);
|
|
}
|
|
|
|
/**
|
|
* 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 $this->file_record->status;
|
|
}
|
|
|
|
/**
|
|
* Returns file id.
|
|
*
|
|
* @return int
|
|
*/
|
|
public function get_id() {
|
|
return $this->file_record->id;
|
|
}
|
|
|
|
/**
|
|
* Returns sha1 hash of file content.
|
|
*
|
|
* @return string
|
|
*/
|
|
public function get_contenthash() {
|
|
$this->sync_external_file();
|
|
return $this->file_record->contenthash;
|
|
}
|
|
|
|
/**
|
|
* Returns sha1 hash of all file path components sha1("contextid/component/filearea/itemid/dir/dir/filename.ext").
|
|
*
|
|
* @return string
|
|
*/
|
|
public function get_pathnamehash() {
|
|
return $this->file_record->pathnamehash;
|
|
}
|
|
|
|
/**
|
|
* Returns the license type of the file, it is a short name referred from license table.
|
|
*
|
|
* @return string
|
|
*/
|
|
public function get_license() {
|
|
return $this->file_record->license;
|
|
}
|
|
|
|
/**
|
|
* Set license
|
|
*
|
|
* @param string $license license
|
|
*/
|
|
public function set_license($license) {
|
|
$filerecord = new stdClass;
|
|
$filerecord->license = $license;
|
|
$this->update($filerecord);
|
|
}
|
|
|
|
/**
|
|
* Returns the author name of the file.
|
|
*
|
|
* @return string
|
|
*/
|
|
public function get_author() {
|
|
return $this->file_record->author;
|
|
}
|
|
|
|
/**
|
|
* Set author
|
|
*
|
|
* @param string $author
|
|
*/
|
|
public function set_author($author) {
|
|
$filerecord = new stdClass;
|
|
$filerecord->author = $author;
|
|
$this->update($filerecord);
|
|
}
|
|
|
|
/**
|
|
* Returns the source of the file, usually it is a url.
|
|
*
|
|
* @return string
|
|
*/
|
|
public function get_source() {
|
|
return $this->file_record->source;
|
|
}
|
|
|
|
/**
|
|
* Set license
|
|
*
|
|
* @param string $license license
|
|
*/
|
|
public function set_source($source) {
|
|
$filerecord = new stdClass;
|
|
$filerecord->source = $source;
|
|
$this->update($filerecord);
|
|
}
|
|
|
|
|
|
/**
|
|
* Returns the sort order of file
|
|
*
|
|
* @return int
|
|
*/
|
|
public function get_sortorder() {
|
|
return $this->file_record->sortorder;
|
|
}
|
|
|
|
/**
|
|
* Set file sort order
|
|
*
|
|
* @param int $sortorder
|
|
* @return int
|
|
*/
|
|
public function set_sortorder($sortorder) {
|
|
$oldorder = $this->file_record->sortorder;
|
|
$filerecord = new stdClass;
|
|
$filerecord->sortorder = $sortorder;
|
|
$this->update($filerecord);
|
|
if (!$this->is_directory()) {
|
|
// Callback for file sort order change.
|
|
if ($pluginsfunction = get_plugins_with_function('after_file_sorted')) {
|
|
foreach ($pluginsfunction as $plugintype => $plugins) {
|
|
foreach ($plugins as $pluginfunction) {
|
|
$pluginfunction($this->file_record, $oldorder, $sortorder);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns repository id
|
|
*
|
|
* @return int|null
|
|
*/
|
|
public function get_repository_id() {
|
|
if (!empty($this->repository)) {
|
|
return $this->repository->id;
|
|
} else {
|
|
return null;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns repository type.
|
|
*
|
|
* @return mixed str|null the repository type or null if is not an external file
|
|
* @since Moodle 3.3
|
|
*/
|
|
public function get_repository_type() {
|
|
|
|
if (!empty($this->repository)) {
|
|
return $this->repository->get_typename();
|
|
} else {
|
|
return null;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* get reference file id
|
|
* @return int
|
|
*/
|
|
public function get_referencefileid() {
|
|
return $this->file_record->referencefileid;
|
|
}
|
|
|
|
/**
|
|
* Get reference last sync time
|
|
* @return int
|
|
*/
|
|
public function get_referencelastsync() {
|
|
return $this->file_record->referencelastsync;
|
|
}
|
|
|
|
/**
|
|
* Function stored_file::get_referencelifetime() is deprecated as reference
|
|
* life time is no longer stored in DB or returned by repository. Each
|
|
* repository should decide by itself when to synchronise the references.
|
|
*
|
|
* @deprecated since Moodle 2.6 MDL-42016 - please do not use this function any more.
|
|
* @see repository::sync_reference()
|
|
*/
|
|
public function get_referencelifetime() {
|
|
throw new coding_exception('Function stored_file::get_referencelifetime() can not be used any more. ' .
|
|
'See repository::sync_reference().');
|
|
}
|
|
/**
|
|
* Returns file reference
|
|
*
|
|
* @return string
|
|
*/
|
|
public function get_reference() {
|
|
return $this->file_record->reference;
|
|
}
|
|
|
|
/**
|
|
* Get human readable file reference information
|
|
*
|
|
* @return string
|
|
*/
|
|
public function get_reference_details() {
|
|
return $this->repository->get_reference_details($this->get_reference(), $this->get_status());
|
|
}
|
|
|
|
/**
|
|
* Called after reference-file has been synchronized with the repository
|
|
*
|
|
* We update contenthash, filesize and status in files table if changed
|
|
* and we always update lastsync in files_reference table
|
|
*
|
|
* @param null|string $contenthash if set to null contenthash is not changed
|
|
* @param int $filesize new size of the file
|
|
* @param int $status new status of the file (0 means OK, 666 - source missing)
|
|
* @param int $timemodified last time modified of the source, if known
|
|
*/
|
|
public function set_synchronized($contenthash, $filesize, $status = 0, $timemodified = null) {
|
|
if (!$this->is_external_file()) {
|
|
return;
|
|
}
|
|
$now = time();
|
|
if ($contenthash === null) {
|
|
$contenthash = $this->file_record->contenthash;
|
|
}
|
|
if ($contenthash != $this->file_record->contenthash) {
|
|
$oldcontenthash = $this->file_record->contenthash;
|
|
}
|
|
// this will update all entries in {files} that have the same filereference id
|
|
$this->fs->update_references($this->file_record->referencefileid, $now, null, $contenthash, $filesize, $status, $timemodified);
|
|
// we don't need to call update() for this object, just set the values of changed fields
|
|
$this->file_record->contenthash = $contenthash;
|
|
$this->file_record->filesize = $filesize;
|
|
$this->file_record->status = $status;
|
|
$this->file_record->referencelastsync = $now;
|
|
if ($timemodified) {
|
|
$this->file_record->timemodified = $timemodified;
|
|
}
|
|
if (isset($oldcontenthash)) {
|
|
$this->filesystem->remove_file($oldcontenthash);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Sets the error status for a file that could not be synchronised
|
|
*/
|
|
public function set_missingsource() {
|
|
$this->set_synchronized($this->file_record->contenthash, $this->file_record->filesize, 666);
|
|
}
|
|
|
|
/**
|
|
* Send file references
|
|
*
|
|
* @param int $lifetime Number of seconds before the file should expire from caches (default 24 hours)
|
|
* @param int $filter 0 (default)=no filtering, 1=all files, 2=html files only
|
|
* @param bool $forcedownload If true (default false), forces download of file rather than view in browser/plugin
|
|
* @param array $options additional options affecting the file serving
|
|
*/
|
|
public function send_file($lifetime, $filter, $forcedownload, $options) {
|
|
$this->repository->send_file($this, $lifetime, $filter, $forcedownload, $options);
|
|
}
|
|
|
|
/**
|
|
* Imports the contents of an external file into moodle filepool.
|
|
*
|
|
* @throws moodle_exception if file could not be downloaded or is too big
|
|
* @param int $maxbytes throw an exception if file size is bigger than $maxbytes (0 means no limit)
|
|
*/
|
|
public function import_external_file_contents($maxbytes = 0) {
|
|
if ($this->repository) {
|
|
$this->repository->import_external_file_contents($this, $maxbytes);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Gets a file relative to this file in the repository and sends it to the browser.
|
|
* Checks the function repository::supports_relative_file() to make sure it can be used.
|
|
*
|
|
* @param string $relativepath the relative path to the file we are trying to access
|
|
*/
|
|
public function send_relative_file($relativepath) {
|
|
if ($this->repository && $this->repository->supports_relative_file()) {
|
|
$relativepath = clean_param($relativepath, PARAM_PATH);
|
|
$this->repository->send_relative_file($this, $relativepath);
|
|
} else {
|
|
send_file_not_found();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Generates a thumbnail for this stored_file.
|
|
*
|
|
* If the GD library has at least version 2 and PNG support is available, the returned data
|
|
* is the content of a transparent PNG file containing the thumbnail. Otherwise, the function
|
|
* returns contents of a JPEG file with black background containing the thumbnail.
|
|
*
|
|
* @param int $width the width of the requested thumbnail
|
|
* @param int $height the height of the requested thumbnail
|
|
* @return string|bool false if a problem occurs, the thumbnail image data otherwise
|
|
*/
|
|
public function generate_image_thumbnail($width, $height) {
|
|
global $CFG;
|
|
require_once($CFG->libdir . '/gdlib.php');
|
|
|
|
if (empty($width) or empty($height)) {
|
|
return false;
|
|
}
|
|
|
|
$content = $this->get_content();
|
|
|
|
// Fetch the image information for this image.
|
|
$imageinfo = @getimagesizefromstring($content);
|
|
if (empty($imageinfo)) {
|
|
return false;
|
|
}
|
|
|
|
// Create a new image from the file.
|
|
$original = @imagecreatefromstring($content);
|
|
|
|
// Generate the thumbnail.
|
|
return generate_image_thumbnail_from_image($original, $imageinfo, $width, $height);
|
|
}
|
|
|
|
/**
|
|
* Generate a resized image for this stored_file.
|
|
*
|
|
* @param int|null $width The desired width, or null to only use the height.
|
|
* @param int|null $height The desired height, or null to only use the width.
|
|
* @return string|false False when a problem occurs, else the image data.
|
|
*/
|
|
public function resize_image($width, $height) {
|
|
global $CFG;
|
|
require_once($CFG->libdir . '/gdlib.php');
|
|
|
|
$content = $this->get_content();
|
|
|
|
// Fetch the image information for this image.
|
|
$imageinfo = @getimagesizefromstring($content);
|
|
if (empty($imageinfo)) {
|
|
return false;
|
|
}
|
|
|
|
// Create a new image from the file.
|
|
$original = @imagecreatefromstring($content);
|
|
|
|
// Generate the resized image.
|
|
return resize_image_from_image($original, $imageinfo, $width, $height);
|
|
}
|
|
|
|
/**
|
|
* Check whether the supplied file is the same as this file.
|
|
*
|
|
* @param string $path The path to the file on disk
|
|
* @return boolean
|
|
*/
|
|
public function compare_to_path($path) {
|
|
return $this->get_contenthash() === file_storage::hash_from_path($path);
|
|
}
|
|
|
|
/**
|
|
* Check whether the supplied content is the same as this file.
|
|
*
|
|
* @param string $content The file content
|
|
* @return boolean
|
|
*/
|
|
public function compare_to_string($content) {
|
|
return $this->get_contenthash() === file_storage::hash_from_string($content);
|
|
}
|
|
}
|
|
|