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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/>.
/**
* Blackboard V5 and V6 question importer.
*
* @package qformat_blackboard_six
* @copyright 2012 Jean-Michel Vedrine
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die();
/**
* Base class question import format for zip files with images
*
* @package qformat_blackboard_six
* @copyright 2012 Jean-Michel Vedrine
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class qformat_blackboard_six_base extends qformat_based_on_xml {
/** @var string path to path to root of image tree in unzipped archive. */
public $filebase = '';
/** @var string path to the temporary directory. */
public $tempdir = '';
/**
* This plugin provide import
* @return bool true
*/
public function provide_import() {
return true;
}
/**
* Check if the given file is capable of being imported by this plugin.
* As {@link file_storage::mimetype()} may use finfo PHP extension if available,
* the value returned by $file->get_mimetype for a .dat file is not the same on all servers.
* So we must made 2 checks to verify if the plugin can import the file.
* @param stored_file $file the file to check
* @return bool whether this plugin can import the file
*/
public function can_import_file($file) {
$mimetypes = array(
mimeinfo('type', '.dat'),
mimeinfo('type', '.zip')
);
return in_array($file->get_mimetype(), $mimetypes) || in_array(mimeinfo('type', $file->get_filename()), $mimetypes);
}
public function mime_type() {
return mimeinfo('type', '.zip');
}
/**
* Does any post-processing that may be desired
* Clean the temporary directory if a zip file was imported
* @return bool success
*/
public function importpostprocess() {
if ($this->tempdir != '') {
fulldelete($this->tempdir);
}
return true;
}
/**
* Set the path to the root of images tree
* @param string $path path to images root
*/
public function set_filebase($path) {
$this->filebase = $path;
}
/**
* Store an image file in a draft filearea
* @param array $text, if itemid element don't exists it will be created
* @param string $tempdir path to root of image tree
* @param string $filepathinsidetempdir path to image in the tree
* @param string $filename image's name
* @return string new name of the image as it was stored
*/
protected function store_file_for_text_field(&$text, $tempdir, $filepathinsidetempdir, $filename) {
global $USER;
$fs = get_file_storage();
if (empty($text['itemid'])) {
$text['itemid'] = file_get_unused_draft_itemid();
}
// As question file areas don't support subdirs,
// convert path to filename.
// So that images with same name can be imported.
$newfilename = clean_param(str_replace('/', '__', $filepathinsidetempdir . '__' . $filename), PARAM_FILE);
$filerecord = array(
'contextid' => context_user::instance($USER->id)->id,
'component' => 'user',
'filearea' => 'draft',
'itemid' => $text['itemid'],
'filepath' => '/',
'filename' => $newfilename,
);
$fs->create_file_from_pathname($filerecord, $tempdir . '/' . $filepathinsidetempdir . '/' . $filename);
return $newfilename;
}
/**
* Given an HTML text with references to images files,
* store all images in a draft filearea,
* and return an array with all urls in text recoded,
* format set to FORMAT_HTML, and itemid set to filearea itemid
* @param string $text text to parse and recode
* @return array with keys text, format, itemid.
*/
public function text_field($text) {
$data = array();
// Step one, find all file refs then add to array.
preg_match_all('|<img[^>]+src="([^"]*)"|i', $text, $out); // Find all src refs.
$filepaths = array();
foreach ($out[1] as $path) {
$fullpath = $this->filebase . '/' . $path;
if (is_readable($fullpath) && !in_array($path, $filepaths)) {
$dirpath = dirname($path);
$filename = basename($path);
$newfilename = $this->store_file_for_text_field($data, $this->filebase, $dirpath, $filename);
$text = preg_replace("|{$path}|", "@@PLUGINFILE@@/" . $newfilename, $text);
$filepaths[] = $path;
}
}
$data['text'] = $text;
$data['format'] = FORMAT_HTML;
return $data;
}
/**
* Same as text_field but text is cleaned.
* @param string $text text to parse and recode
* @return array with keys text, format, itemid.
*/
public function cleaned_text_field($text) {
return $this->text_field($this->cleaninput($text));
}
}