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445 lines
14 KiB
PHP
445 lines
14 KiB
PHP
<?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 moodlecore
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* @subpackage file-browser
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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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/**
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* Represents an actual file or folder - a row in the file table -
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* in the tree navigated by @see{file_browser}.
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*/
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class file_info_stored extends file_info {
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protected $lf;
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protected $urlbase;
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protected $topvisiblename;
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protected $itemidused;
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protected $readaccess;
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protected $writeaccess;
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protected $areaonly;
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public function __construct($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 = $areaonly;
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}
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/**
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* Returns list of standard virtual file/directory identification.
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* The difference from stored_file parameters is that null values
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* are allowed in all fields
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* @return array with keys contextid, filearea, itemid, filepath and filename
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*/
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public function get_params() {
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return array('contextid'=>$this->context->id,
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'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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* @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 file download url
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* @param bool $forcedownload
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* @param bool $htts force https
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* @return string url
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*/
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public function get_url($forcedownload=false, $https=false) {
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global $CFG;
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if (!$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 = $this->lf->get_contextid();
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$filearea = $this->lf->get_filearea();
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$filepath = $this->lf->get_filepath();
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$filename = $this->lf->get_filename();
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$itemid = $this->lf->get_itemid();
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if ($this->itemidused) {
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$path = '/'.$contextid.'/'.$filearea.'/'.$itemid.$filepath.$filename;
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} else {
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$path = '/'.$contextid.'/'.$filearea.$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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* Can I read content of this file or enter directory?
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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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* Can I add new files or directories?
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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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* Returns file size in bytes, null for directories
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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 mimetype
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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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* @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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* @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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* Is directory?
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* @return bool
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*/
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public function is_directory() {
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return $this->lf->is_directory();
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}
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/**
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* Returns list of children.
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* @return array of file_info instances
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*/
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public function get_children() {
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if (!$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_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 $result;
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}
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/**
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* Returns parent file_info instance
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* @return file_info or null for root
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*/
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public function get_parent() {
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if ($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_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_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_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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* @param string $newdirname name of new directory
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* @param int id of author, default $USER->id
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* @return file_info new directory
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*/
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public function create_directory($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_filearea(), $this->lf->get_itemid(), $filepath, $userid)) {
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return $this->browser->get_file_info($this->context, $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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* @param string $newfilename name of new file
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* @param string $content of file
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* @param int id of author, default $USER->id
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* @return file_info new file
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*/
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public function create_file_from_string($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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$now = time();
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$newrecord = new object();
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$newrecord->contextid = $this->lf->get_contextid();
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$newrecord->filearea = $this->lf->get_filearea();
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$newrecord->itemid = $this->lf->get_itemid();
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$newrecord->filepath = $this->lf->get_filepath();
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$newrecord->filename = $newfilename;
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$newrecord->timecreated = $now;
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$newrecord->timemodified = $now;
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$newrecord->mimetype = mimeinfo('type', $newfilename);
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$newrecord->userid = $userid;
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$fs = get_file_storage();
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if ($file = $fs->create_file_from_string($newrecord, $content)) {
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return $this->browser->get_file_info($this->context, $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 pathname - make sure
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* params are valid.
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* @param string $newfilename name of new file
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* @param string $pathname location of file
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* @param int id of author, default $USER->id
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* @return file_info new file
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*/
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public function create_file_from_pathname($newfilename, $pathname, $userid=null) {
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if (!$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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$now = time();
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$newrecord = new object();
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$newrecord->contextid = $this->lf->get_contextid();
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$newrecord->filearea = $this->lf->get_filearea();
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$newrecord->itemid = $this->lf->get_itemid();
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$newrecord->filepath = $this->lf->get_filepath();
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$newrecord->filename = $newfilename;
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$newrecord->timecreated = $now;
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$newrecord->timemodified = $now;
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$newrecord->mimetype = mimeinfo('type', $newfilename);
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$newrecord->userid = $userid;
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$fs = get_file_storage();
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if ($file = $fs->create_file_from_pathname($newrecord, $pathname)) {
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return $this->browser->get_file_info($this->context, $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 stored file - make sure
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* params are valid.
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* @param string $newfilename name of new file
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* @param mixed dile id or stored_file of file
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* @param int id of author, default $USER->id
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* @return file_info new file
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*/
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public function create_file_from_storedfile($newfilename, $fid, $userid=null) {
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if (!$this->is_writable() or $this->lf->get_filename() !== '.') {
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return null;
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}
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$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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$now = time();
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$newrecord = new object();
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$newrecord->contextid = $this->lf->get_contextid();
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$newrecord->filearea = $this->lf->get_filearea();
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$newrecord->itemid = $this->lf->get_itemid();
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$newrecord->filepath = $this->lf->get_filepath();
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$newrecord->filename = $newfilename;
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$newrecord->timecreated = $now;
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$newrecord->timemodified = $now;
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$newrecord->mimetype = mimeinfo('type', $newfilename);
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$newrecord->userid = $userid;
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$fs = get_file_storage();
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if ($file = $fs->create_file_from_storedfile($newrecord, $fid)) {
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return $this->browser->get_file_info($this->context, $file->get_filearea(), $file->get_itemid(), $file->get_filepath(), $file->get_filename());
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}
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return null;
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}
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/**
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* Delete file, make sure file is deletable first.
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* @return bool success
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*/
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public function delete() {
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if (!$this->is_writable()) {
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return false;
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}
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if ($this->is_directory()) {
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$filepath = $this->lf->get_filepath();
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$fs = get_file_storage();
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$storedfiles = $fs->get_area_files($this->context->id, $this->lf->get_filearea(), $this->lf->get_itemid(), "");
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foreach ($storedfiles as $file) {
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if (strpos($file->get_filepath(), $filepath) === 0) {
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$file->delete();
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}
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}
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}
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return $this->lf->delete();
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}
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/**
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* Copy content of this file to local storage, overriding current file if needed.
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* @param int $contextid
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* @param string $filearea
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* @param int $itemid
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* @param string $filepath
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* @param string $filename
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* @return boolean success
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*/
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public function copy_to_storage($contextid, $filearea, $itemid, $filepath, $filename) {
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if (!$this->is_readable() or $this->is_directory()) {
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return false;
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}
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$fs = get_file_storage();
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if ($existing = $fs->get_file($contextid, $filearea, $itemid, $filepath, $filename)) {
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$existing->delete();
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}
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$file_record = array('contextid'=>$contextid, 'filearea'=>$filearea, 'itemid'=>$itemid, 'filepath'=>$fileapth, 'filename'=>$filename);
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$fs->create_file_from_storedfile($file_record, $this->lf);
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return true;
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}
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/**
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* Copy content of this file to local storage, overriding current file if needed.
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* @param string $pathname real local full file name
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* @return boolean success
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*/
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public function copy_to_pathname($pathname) {
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if (!$this->is_readable() or $this->is_directory()) {
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return false;
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}
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if (file_exists($pathname)) {
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if (!unlink($pathname)) {
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return false;
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}
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}
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$this->lf->copy_content_to($pathname);
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return true;
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}
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}
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