C:/xampp/htdocs/moodle/lib/filestorage/stored_file.php

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<?php

// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.


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

require_once("$CFG->libdir/filestorage/stored_file.php");

class stored_file {
    private $fs;
    private $file_record;
    private $filedir;

    public function __construct(file_storage $fs, stdClass $file_record, $filedir) {
        $this->fs          = $fs;
        $this->file_record = clone($file_record); // prevent modifications
        $this->filedir     = $filedir; // keep secret, do not expose!
    }

    public function is_directory() {
        return ($this->file_record->filename === '.');
    }

    public function delete() {
        global $DB;
        $DB->delete_records('files', array('id'=>$this->file_record->id));
        // moves pool file to trash if content not needed any more
        $this->fs->deleted_file_cleanup($this->file_record->contenthash);
        return true; // BC only
    }

    protected function get_content_file_location() {
        $contenthash = $this->file_record->contenthash;
        $l1 = $contenthash[0].$contenthash[1];
        $l2 = $contenthash[2].$contenthash[3];
        return "$this->filedir/$l1/$l2/$contenthash";
    }

    public function add_to_curl_request(&$curlrequest, $key) {
        $curlrequest->_tmp_file_post_params[$key] = '@' . $this->get_content_file_location();
    }

    public function get_content_file_handle() {
        $path = $this->get_content_file_location();
        if (!is_readable($path)) {
            if (!$this->fs->try_content_recovery($this) or !is_readable($path)) {
                throw new file_exception('storedfilecannotread', '', $path);
            }
        }
        return fopen($path, 'rb'); //binary reading only!!
    }

    public function readfile() {
        $path = $this->get_content_file_location();
        if (!is_readable($path)) {
            if (!$this->fs->try_content_recovery($this) or !is_readable($path)) {
                throw new file_exception('storedfilecannotread', '', $path);
            }
        }
        readfile($path);
    }

    public function get_content() {
        $path = $this->get_content_file_location();
        if (!is_readable($path)) {
            if (!$this->fs->try_content_recovery($this) or !is_readable($path)) {
                throw new file_exception('storedfilecannotread', '', $path);
            }
        }
        return file_get_contents($this->get_content_file_location());
    }

    public function copy_content_to($pathname) {
        $path = $this->get_content_file_location();
        if (!is_readable($path)) {
            if (!$this->fs->try_content_recovery($this) or !is_readable($path)) {
                throw new file_exception('storedfilecannotread', '', $path);
            }
        }
        return copy($path, $pathname);
    }

    public function list_files(file_packer $packer) {
        $archivefile = $this->get_content_file_location();
        return $packer->list_files($archivefile);
    }

    public function extract_to_pathname(file_packer $packer, $pathname) {
        $archivefile = $this->get_content_file_location();
        return $packer->extract_to_pathname($archivefile, $pathname);
    }

    public function extract_to_storage(file_packer $packer, $contextid, $component, $filearea, $itemid, $pathbase, $userid = NULL) {
        $archivefile = $this->get_content_file_location();
        return $packer->extract_to_storage($archivefile, $contextid, $component, $filearea, $itemid, $pathbase);
    }

    public function archive_file(file_archive $filearch, $archivepath) {
        if ($this->is_directory()) {
            return $filearch->add_directory($archivepath);
        } else {
            $path = $this->get_content_file_location();
            if (!is_readable($path)) {
                return false;
            }
            return $filearch->add_file_from_pathname($archivepath, $path);
        }
    }

    public function get_imageinfo() {
        if (!$imageinfo = getimagesize($this->get_content_file_location())) {
            return false;
        }
        $image = array('width'=>$imageinfo[0], 'height'=>$imageinfo[1], 'mimetype'=>image_type_to_mime_type($imageinfo[2]));
        if (empty($image['width']) or empty($image['height']) or empty($image['mimetype'])) {
            // gd can not parse it, sorry
            return false;
        }
        return $image;
    }

    public function is_valid_image() {
        $mimetype = $this->get_mimetype();
        if ($mimetype !== 'image/gif' and $mimetype !== 'image/jpeg' and $mimetype !== 'image/png') {
            return false;
        }
        if (!$info = $this->get_imageinfo()) {
            return false;
        }
        if ($info['mimetype'] !== $mimetype) {
            return false;
        }
        // ok, GD likes this image
        return true;
    }

    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);
    }

    public function get_contextid() {
        return $this->file_record->contextid;
    }

    public function get_component() {
        return $this->file_record->component;
    }

    public function get_filearea() {
        return $this->file_record->filearea;
    }

    public function get_itemid() {
        return $this->file_record->itemid;
    }

    public function get_filepath() {
        return $this->file_record->filepath;
    }

    public function get_filename() {
        return $this->file_record->filename;
    }

    public function get_userid() {
        return $this->file_record->userid;
    }

    public function get_filesize() {
        return $this->file_record->filesize;
    }

    public function get_mimetype() {
        return $this->file_record->mimetype;
    }

    public function get_timecreated() {
        return $this->file_record->timecreated;
    }

    public function get_timemodified() {
        return $this->file_record->timemodified;
    }

    public function get_status() {
        return $this->file_record->status;
    }

    public function get_id() {
        return $this->file_record->id;
    }

    public function get_contenthash() {
        return $this->file_record->contenthash;
    }

    public function get_pathnamehash() {
        return $this->file_record->pathnamehash;
    }

    public function get_license() {
        return $this->file_record->license;
    }

    public function get_author() {
        return $this->file_record->author;
    }

    public function get_source() {
        return $this->file_record->source;
    }

    public function get_sortorder() {
        return $this->file_record->sortorder;
    }
}