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698 lines
24 KiB
698 lines
24 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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* Utility class for browsing of stored files.
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*
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* @package core_files
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* @copyright 2008 Petr Skoda (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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/**
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* Represents an actual file or folder - a row in the file table in the tree navigated by {@link file_browser}.
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*
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* @package core_files
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* @copyright 2008 Petr Skoda (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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class file_info_stored extends file_info {
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/** @var stored_file|virtual_root_file stored_file or virtual_root_file instance */
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protected $lf;
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/** @var string the serving script */
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protected $urlbase;
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/** @var string the human readable name of this area */
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protected $topvisiblename;
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/** @var int|bool it's false if itemid is 0 and not included in URL */
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protected $itemidused;
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/** @var bool allow file reading */
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protected $readaccess;
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/** @var bool allow file write, delee */
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protected $writeaccess;
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/** @var string do not show links to parent context/area */
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protected $areaonly;
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/**
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* Constructor
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*
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* @param file_browser $browser file browser instance
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* @param stdClass $context context object
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* @param stored_file|virtual_root_file $storedfile stored_file instance
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* @param string $urlbase the serving script - usually the $CFG->wwwroot/.'pluginfile.php'
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* @param string $topvisiblename the human readable name of this area
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* @param int|bool $itemidused false if itemid always 0 and not included in URL
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* @param bool $readaccess allow file reading
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* @param bool $writeaccess allow file write, delete
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* @param string $areaonly do not show links to parent context/area
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*/
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public function __construct(file_browser $browser, $context, $storedfile, $urlbase, $topvisiblename, $itemidused, $readaccess, $writeaccess, $areaonly) {
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parent::__construct($browser, $context);
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$this->lf = $storedfile;
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$this->urlbase = $urlbase;
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$this->topvisiblename = $topvisiblename;
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$this->itemidused = $itemidused;
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$this->readaccess = $readaccess;
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$this->writeaccess = $writeaccess;
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$this->areaonly = $areaonly;
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}
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/**
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* Returns list of standard virtual file/directory identification.
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* The difference from stored_file parameters is that null values
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* are allowed in all fields
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*
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* @return array with keys contextid, component, filearea, itemid, filepath and filename
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*/
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public function get_params() {
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return array('contextid'=>$this->context->id,
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'component'=>$this->lf->get_component(),
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'filearea' =>$this->lf->get_filearea(),
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'itemid' =>$this->lf->get_itemid(),
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'filepath' =>$this->lf->get_filepath(),
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'filename' =>$this->lf->get_filename());
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}
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/**
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* Returns localised visible name.
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*
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* @return string
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*/
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public function get_visible_name() {
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$filename = $this->lf->get_filename();
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$filepath = $this->lf->get_filepath();
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if ($filename !== '.') {
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return $filename;
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} else {
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$dir = trim($filepath, '/');
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$dir = explode('/', $dir);
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$dir = array_pop($dir);
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if ($dir === '') {
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return $this->topvisiblename;
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} else {
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return $dir;
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}
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}
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}
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/**
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* Returns the localised human-readable name of the file together with virtual path
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*
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* @return string
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*/
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public function get_readable_fullname() {
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global $CFG;
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// retrieve the readable path with all parents (excluding the top most 'System')
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$fpath = array();
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for ($parent = $this; $parent && $parent->get_parent(); $parent = $parent->get_parent()) {
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array_unshift($fpath, $parent->get_visible_name());
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}
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if ($this->lf->get_component() == 'user' && $this->lf->get_filearea() == 'private') {
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// use the special syntax for user private files - 'USERNAME Private files: PATH'
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$username = array_shift($fpath);
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array_shift($fpath); // get rid of "Private Files/" in the beginning of the path
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return get_string('privatefilesof', 'repository', $username). ': '. join('/', $fpath);
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} else {
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// for all other files (except user private files) return 'Server files: PATH'
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// first, get and cache the name of the repository_local (will be used as prefix for file names):
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static $replocalname = null;
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if ($replocalname === null) {
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require_once($CFG->dirroot . "/repository/lib.php");
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$instances = repository::get_instances(array('type' => 'local'));
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if (count($instances)) {
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$firstinstance = reset($instances);
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$replocalname = $firstinstance->get_name();
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} else if (get_string_manager()->string_exists('pluginname', 'repository_local')) {
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$replocalname = get_string('pluginname', 'repository_local');
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} else {
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$replocalname = get_string('arearoot', 'repository');
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}
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}
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return $replocalname. ': '. join('/', $fpath);
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}
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}
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/**
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* Returns file download url
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*
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* @param bool $forcedownload Whether or not force download
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* @param bool $https whether or not force https
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* @return string url
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*/
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public function get_url($forcedownload=false, $https=false) {
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if (!$this->is_readable()) {
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return null;
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}
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if ($this->is_directory()) {
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return null;
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}
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$this->urlbase;
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$contextid = $this->lf->get_contextid();
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$component = $this->lf->get_component();
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$filearea = $this->lf->get_filearea();
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$itemid = $this->lf->get_itemid();
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$filepath = $this->lf->get_filepath();
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$filename = $this->lf->get_filename();
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if ($this->itemidused) {
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$path = '/'.$contextid.'/'.$component.'/'.$filearea.'/'.$itemid.$filepath.$filename;
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} else {
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$path = '/'.$contextid.'/'.$component.'/'.$filearea.$filepath.$filename;
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}
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return file_encode_url($this->urlbase, $path, $forcedownload, $https);
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}
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/**
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* Whether or not I can read content of this file or enter directory
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*
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* @return bool
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*/
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public function is_readable() {
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return $this->readaccess;
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}
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/**
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* Whether or not new files or directories can be added
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*
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* @return bool
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*/
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public function is_writable() {
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return $this->writeaccess;
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}
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/**
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* Whether or not this is an empty area
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*
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* @return bool
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*/
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public function is_empty_area() {
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if ($this->lf->get_filepath() === '/' and $this->lf->get_filename() === '.') {
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// test the emptiness only in the top most level, it does not make sense at lower levels
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$fs = get_file_storage();
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return $fs->is_area_empty($this->lf->get_contextid(), $this->lf->get_component(), $this->lf->get_filearea(), $this->lf->get_itemid());
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} else {
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return false;
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}
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}
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/**
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* Returns file size in bytes, null for directories
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*
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* @return int bytes or null if not known
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*/
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public function get_filesize() {
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return $this->lf->get_filesize();
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}
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/**
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* Returns width, height and mimetype of the stored image, or false
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*
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* @see stored_file::get_imageinfo()
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* @return array|false
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*/
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public function get_imageinfo() {
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return $this->lf->get_imageinfo();
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}
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/**
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* Returns mimetype
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*
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* @return string mimetype or null if not known
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*/
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public function get_mimetype() {
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return $this->lf->get_mimetype();
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}
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/**
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* Returns time created unix timestamp if known
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*
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* @return int timestamp or null
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*/
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public function get_timecreated() {
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return $this->lf->get_timecreated();
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}
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/**
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* Returns time modified unix timestamp if known
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*
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* @return int timestamp or null
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*/
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public function get_timemodified() {
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return $this->lf->get_timemodified();
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}
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/**
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* Whether or not this is a directory
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*
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* @return bool
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*/
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public function is_directory() {
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return $this->lf->is_directory();
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}
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/**
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* Returns the license type of the file
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*
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* @return string license short name or null
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*/
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public function get_license() {
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return $this->lf->get_license();
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}
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/**
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* Returns the author name of the file
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*
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* @return string author name or null
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*/
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public function get_author() {
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return $this->lf->get_author();
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}
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/**
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* Returns the source of the file
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*
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* @return string a source url or null
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*/
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public function get_source() {
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return $this->lf->get_source();
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}
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/**
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* Returns the sort order of the file
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*
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* @return int
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*/
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public function get_sortorder() {
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return $this->lf->get_sortorder();
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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 $this->lf->is_external_file();
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}
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/**
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* Returns file status flag.
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*
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* @return int 0 means file OK, anything else is a problem and file can not be used
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*/
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public function get_status() {
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return $this->lf->get_status();
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}
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/**
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* Returns list of children.
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*
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* @return array of file_info instances
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*/
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public function get_children() {
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if (!$this->lf->is_directory()) {
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return array();
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}
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$result = array();
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$fs = get_file_storage();
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$storedfiles = $fs->get_directory_files($this->context->id, $this->lf->get_component(), $this->lf->get_filearea(), $this->lf->get_itemid(),
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$this->lf->get_filepath(), false, true, "filepath, filename");
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foreach ($storedfiles as $file) {
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$result[] = new file_info_stored($this->browser, $this->context, $file, $this->urlbase, $this->topvisiblename,
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$this->itemidused, $this->readaccess, $this->writeaccess, false);
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}
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return $result;
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}
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/**
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* Returns list of children which are either files matching the specified extensions
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* or folders that contain at least one such file.
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*
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* @param string|array $extensions, either '*' or array of lowercase extensions, i.e. array('.gif','.jpg')
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* @return array of file_info instances
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*/
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public function get_non_empty_children($extensions = '*') {
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$result = array();
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if (!$this->lf->is_directory()) {
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return $result;
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}
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$fs = get_file_storage();
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$storedfiles = $fs->get_directory_files($this->context->id, $this->lf->get_component(), $this->lf->get_filearea(), $this->lf->get_itemid(),
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$this->lf->get_filepath(), false, true, "filepath, filename");
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foreach ($storedfiles as $file) {
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$extension = core_text::strtolower(pathinfo($file->get_filename(), PATHINFO_EXTENSION));
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if ($file->is_directory() || $extensions === '*' || (!empty($extension) && in_array('.'.$extension, $extensions))) {
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$fileinfo = new file_info_stored($this->browser, $this->context, $file, $this->urlbase, $this->topvisiblename,
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$this->itemidused, $this->readaccess, $this->writeaccess, false);
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if (!$file->is_directory() || $fileinfo->count_non_empty_children($extensions)) {
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$result[] = $fileinfo;
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}
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}
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}
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return $result;
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}
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/**
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* Returns the number of children which are either files matching the specified extensions
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* or folders containing at least one such file.
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*
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* @param string|array $extensions, for example '*' or array('.gif','.jpg')
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* @param int $limit stop counting after at least $limit non-empty children are found
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* @return int
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*/
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public function count_non_empty_children($extensions = '*', $limit = 1) {
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global $DB;
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if (!$this->lf->is_directory()) {
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return 0;
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}
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$filepath = $this->lf->get_filepath();
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$length = core_text::strlen($filepath);
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$sql = "SELECT filepath, filename
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FROM {files} f
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WHERE f.contextid = :contextid AND f.component = :component AND f.filearea = :filearea AND f.itemid = :itemid
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AND ".$DB->sql_substr("f.filepath", 1, $length)." = :filepath
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AND filename <> '.' ";
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$params = array('contextid' => $this->context->id,
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'component' => $this->lf->get_component(),
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'filearea' => $this->lf->get_filearea(),
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'itemid' => $this->lf->get_itemid(),
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'filepath' => $filepath);
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list($sql2, $params2) = $this->build_search_files_sql($extensions);
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$rs = $DB->get_recordset_sql($sql.' '.$sql2, array_merge($params, $params2));
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$children = array();
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foreach ($rs as $record) {
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// we don't need to check access to individual files here, since the user can access parent
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if ($record->filepath === $filepath) {
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$children[] = $record->filename;
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} else {
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$path = explode('/', core_text::substr($record->filepath, $length));
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if (!in_array($path[0], $children)) {
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$children[] = $path[0];
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}
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}
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if (count($children) >= $limit) {
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break;
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}
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}
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$rs->close();
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return count($children);
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}
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/**
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* Returns parent file_info instance
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*
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* @return file_info|null file_info instance or null for root
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*/
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public function get_parent() {
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if ($this->lf->get_filepath() === '/' and $this->lf->is_directory()) {
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if ($this->areaonly) {
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return null;
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} else if ($this->itemidused) {
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return $this->browser->get_file_info($this->context, $this->lf->get_component(), $this->lf->get_filearea());
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} else {
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return $this->browser->get_file_info($this->context);
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}
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}
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if (!$this->lf->is_directory()) {
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return $this->browser->get_file_info($this->context, $this->lf->get_component(), $this->lf->get_filearea(), $this->lf->get_itemid(), $this->lf->get_filepath(), '.');
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}
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$filepath = $this->lf->get_filepath();
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$filepath = trim($filepath, '/');
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$dirs = explode('/', $filepath);
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array_pop($dirs);
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$filepath = implode('/', $dirs);
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$filepath = ($filepath === '') ? '/' : "/$filepath/";
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return $this->browser->get_file_info($this->context, $this->lf->get_component(), $this->lf->get_filearea(), $this->lf->get_itemid(), $filepath, '.');
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}
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/**
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* Create new directory, may throw exception - make sure
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* params are valid.
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*
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* @param string $newdirname name of new directory
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* @param int $userid id of author, default $USER->id
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* @return file_info|null new directory's file_info instance or null if failed
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*/
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public function create_directory($newdirname, $userid = NULL) {
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if (!$this->is_writable() or !$this->lf->is_directory()) {
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return null;
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}
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$newdirname = clean_param($newdirname, PARAM_FILE);
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if ($newdirname === '') {
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return null;
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}
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$filepath = $this->lf->get_filepath().'/'.$newdirname.'/';
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$fs = get_file_storage();
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if ($file = $fs->create_directory($this->lf->get_contextid(), $this->lf->get_component(), $this->lf->get_filearea(), $this->lf->get_itemid(), $filepath, $userid)) {
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return $this->browser->get_file_info($this->context, $this->lf->get_component(), $file->get_filearea(), $file->get_itemid(), $file->get_filepath(), $file->get_filename());
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}
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return null;
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}
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/**
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* Create new file from string - make sure
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* params are valid.
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*
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* @param string $newfilename name of new file
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* @param string $content of file
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* @param int $userid id of author, default $USER->id
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* @return file_info|null new file's file_info instance or null if failed
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*/
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public function create_file_from_string($newfilename, $content, $userid = NULL) {
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if (!$this->is_writable() or !$this->lf->is_directory()) {
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return null;
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}
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$newfilename = clean_param($newfilename, PARAM_FILE);
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if ($newfilename === '') {
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return null;
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}
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$fs = get_file_storage();
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|
$now = time();
|
|
|
|
$newrecord = new stdClass();
|
|
$newrecord->contextid = $this->lf->get_contextid();
|
|
$newrecord->component = $this->lf->get_component();
|
|
$newrecord->filearea = $this->lf->get_filearea();
|
|
$newrecord->itemid = $this->lf->get_itemid();
|
|
$newrecord->filepath = $this->lf->get_filepath();
|
|
$newrecord->filename = $newfilename;
|
|
|
|
if ($fs->file_exists($newrecord->contextid, $newrecord->component, $newrecord->filearea, $newrecord->itemid, $newrecord->filepath, $newrecord->filename)) {
|
|
// file already exists, sorry
|
|
return null;
|
|
}
|
|
|
|
$newrecord->timecreated = $now;
|
|
$newrecord->timemodified = $now;
|
|
$newrecord->mimetype = mimeinfo('type', $newfilename);
|
|
$newrecord->userid = $userid;
|
|
|
|
if ($file = $fs->create_file_from_string($newrecord, $content)) {
|
|
return $this->browser->get_file_info($this->context, $file->get_component(), $file->get_filearea(), $file->get_itemid(), $file->get_filepath(), $file->get_filename());
|
|
}
|
|
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 $USER->id
|
|
* @return file_info|null new file's file_info instance or null if failed
|
|
*/
|
|
public function create_file_from_pathname($newfilename, $pathname, $userid = NULL) {
|
|
if (!$this->is_writable() or !$this->lf->is_directory()) {
|
|
return null;
|
|
}
|
|
|
|
$newfilename = clean_param($newfilename, PARAM_FILE);
|
|
if ($newfilename === '') {
|
|
return null;
|
|
}
|
|
|
|
$fs = get_file_storage();
|
|
|
|
$now = time();
|
|
|
|
$newrecord = new stdClass();
|
|
$newrecord->contextid = $this->lf->get_contextid();
|
|
$newrecord->component = $this->lf->get_component();
|
|
$newrecord->filearea = $this->lf->get_filearea();
|
|
$newrecord->itemid = $this->lf->get_itemid();
|
|
$newrecord->filepath = $this->lf->get_filepath();
|
|
$newrecord->filename = $newfilename;
|
|
|
|
if ($fs->file_exists($newrecord->contextid, $newrecord->component, $newrecord->filearea, $newrecord->itemid, $newrecord->filepath, $newrecord->filename)) {
|
|
// file already exists, sorry
|
|
return null;
|
|
}
|
|
|
|
$newrecord->timecreated = $now;
|
|
$newrecord->timemodified = $now;
|
|
$newrecord->mimetype = mimeinfo('type', $newfilename);
|
|
$newrecord->userid = $userid;
|
|
|
|
if ($file = $fs->create_file_from_pathname($newrecord, $pathname)) {
|
|
return $this->browser->get_file_info($this->context, $file->get_component(), $file->get_filearea(), $file->get_itemid(), $file->get_filepath(), $file->get_filename());
|
|
}
|
|
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 file id or stored_file of file
|
|
* @param int $userid id of author, default $USER->id
|
|
* @return file_info|null new file's file_info instance or null if failed
|
|
*/
|
|
public function create_file_from_storedfile($newfilename, $fid, $userid = NULL) {
|
|
if (!$this->is_writable() or $this->lf->get_filename() !== '.') {
|
|
return null;
|
|
}
|
|
|
|
$newfilename = clean_param($newfilename, PARAM_FILE);
|
|
if ($newfilename === '') {
|
|
return null;
|
|
}
|
|
|
|
$fs = get_file_storage();
|
|
|
|
$now = time();
|
|
|
|
$newrecord = new stdClass();
|
|
$newrecord->contextid = $this->lf->get_contextid();
|
|
$newrecord->component = $this->lf->get_component();
|
|
$newrecord->filearea = $this->lf->get_filearea();
|
|
$newrecord->itemid = $this->lf->get_itemid();
|
|
$newrecord->filepath = $this->lf->get_filepath();
|
|
$newrecord->filename = $newfilename;
|
|
|
|
if ($fs->file_exists($newrecord->contextid, $newrecord->component, $newrecord->filearea, $newrecord->itemid, $newrecord->filepath, $newrecord->filename)) {
|
|
// file already exists, sorry
|
|
return null;
|
|
}
|
|
|
|
$newrecord->timecreated = $now;
|
|
$newrecord->timemodified = $now;
|
|
$newrecord->mimetype = mimeinfo('type', $newfilename);
|
|
$newrecord->userid = $userid;
|
|
|
|
if ($file = $fs->create_file_from_storedfile($newrecord, $fid)) {
|
|
return $this->browser->get_file_info($this->context, $file->get_component(), $file->get_filearea(), $file->get_itemid(), $file->get_filepath(), $file->get_filename());
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Delete file, make sure file is deletable first.
|
|
*
|
|
* @return bool success
|
|
*/
|
|
public function delete() {
|
|
if (!$this->is_writable()) {
|
|
return false;
|
|
}
|
|
|
|
if ($this->is_directory()) {
|
|
$filepath = $this->lf->get_filepath();
|
|
$fs = get_file_storage();
|
|
$storedfiles = $fs->get_area_files($this->context->id, $this->get_component(), $this->lf->get_filearea(), $this->lf->get_itemid());
|
|
foreach ($storedfiles as $file) {
|
|
if (strpos($file->get_filepath(), $filepath) === 0) {
|
|
$file->delete();
|
|
}
|
|
}
|
|
}
|
|
|
|
return $this->lf->delete();
|
|
}
|
|
|
|
/**
|
|
* 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) {
|
|
if (!$this->is_readable() or $this->is_directory()) {
|
|
return false;
|
|
}
|
|
$filerecord = (array)$filerecord;
|
|
|
|
$fs = get_file_storage();
|
|
if ($existing = $fs->get_file($filerecord['contextid'], $filerecord['component'], $filerecord['filearea'], $filerecord['itemid'], $filerecord['filepath'], $filerecord['filename'])) {
|
|
$existing->delete();
|
|
}
|
|
$fs->create_file_from_storedfile($filerecord, $this->lf);
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Copy content of this file to local storage, overriding current file if needed.
|
|
*
|
|
* @param string $pathname real local full file name
|
|
* @return bool success
|
|
*/
|
|
public function copy_to_pathname($pathname) {
|
|
if (!$this->is_readable() or $this->is_directory()) {
|
|
return false;
|
|
}
|
|
|
|
if (file_exists($pathname)) {
|
|
if (!unlink($pathname)) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
$this->lf->copy_content_to($pathname);
|
|
|
|
return true;
|
|
}
|
|
}
|
|
|