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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/>.
/**
* @package moodlecore
* @subpackage backup-imscc
* @copyright 2009 Mauro Rondinelli (mauro.rondinelli [AT] uvcms.com)
* @copyright 2011 Darko Miletic (dmiletic@moodlerooms.com)
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') or die('Direct access to this script is forbidden.');
class entities {
/**
* Prepares convert for inclusion into XML
*
* @param string $value
* @return string
*/
public static function safexml($value) {
$result = htmlspecialchars(html_entity_decode($value, ENT_QUOTES, 'UTF-8'),
ENT_NOQUOTES,
'UTF-8',
false);
return $result;
}
protected function prepare_content($content) {
$result = $content;
if (empty($result)) {
return '';
}
$encoding = null;
$xml_error = new libxml_errors_mgr();
$dom = new DOMDocument();
$dom->validateOnParse = false;
$dom->strictErrorChecking = false;
if ($dom->loadHTML($content)) {
$encoding = $dom->xmlEncoding;
}
if (empty($encoding)) {
$encoding = mb_detect_encoding($content, 'auto', true);
}
if (!empty($encoding) && !mb_check_encoding($content, 'UTF-8')) {
$result = mb_convert_encoding($content, 'UTF-8', $encoding);
}
// See if we can strip off body tag and anything outside of it.
foreach (array('body', 'html') as $tagname) {
$regex = str_replace('##', $tagname, "/<##[^>]*>(.+)<\/##>/is");
if (preg_match($regex, $result, $matches)) {
$result = $matches[1];
break;
}
}
return $result;
}
public function load_xml_resource($path_to_file) {
$resource = new DOMDocument();
cc2moodle::log_action('Load the XML resource file: '.$path_to_file);
if (!$resource->load($path_to_file)) {
cc2moodle::log_action('Cannot load the XML resource file: ' . $path_to_file, true);
}
return $resource;
}
public function update_sources($html, $root_path = '') {
$document = $this->load_html($html);
$tags = array('img' => 'src' , 'a' => 'href');
foreach ($tags as $tag => $attribute) {
$elements = $document->getElementsByTagName($tag);
foreach ($elements as $element) {
$attribute_value = $element->getAttribute($attribute);
$protocol = parse_url($attribute_value, PHP_URL_SCHEME);
if (empty($protocol)) {
$attribute_value = str_replace("\$IMS-CC-FILEBASE\$", "", $attribute_value);
$attribute_value = $this->full_path($root_path . "/" . $attribute_value, "/");
$attribute_value = "\$@FILEPHP@\$" . "/" . $attribute_value;
}
$element->setAttribute($attribute, $attribute_value);
}
}
$html = $this->html_insidebody($document);
return $html;
}
public function full_path($path, $dir_sep = DIRECTORY_SEPARATOR) {
$token = '$IMS-CC-FILEBASE$';
$path = str_replace($token, '', $path);
if (is_string($path) && ($path != '')) {
$dot_dir = '.';
$up_dir = '..';
$length = strlen($path);
$rtemp = trim($path);
$start = strrpos($path, $dir_sep);
$can_continue = ($start !== false);
$result = $can_continue ? '' : $path;
$rcount = 0;
while ($can_continue) {
$dir_part = ($start !== false) ? substr($rtemp, $start + 1, $length - $start) : $rtemp;
$can_continue = ($dir_part !== false);
if ($can_continue) {
if ($dir_part != $dot_dir) {
if ($dir_part == $up_dir) {
$rcount++;
} else {
if ($rcount > 0) {
$rcount --;
} else {
$result = ($result == '') ? $dir_part : $dir_part . $dir_sep . $result;
}
}
}
$rtemp = substr($path, 0, $start);
$start = strrpos($rtemp, $dir_sep);
$can_continue = (($start !== false) || (strlen($rtemp) > 0));
}
}
}
return $result;
}
public function include_titles ($html) {
$document = $this->load_html($html);
$images = $document->getElementsByTagName('img');
foreach ($images as $image) {
$src = $image->getAttribute('src');
$alt = $image->getAttribute('alt');
$title = $image->getAttribute('title');
$filename = pathinfo($src);
$filename = $filename['filename'];
$alt = empty($alt) ? $filename : $alt;
$title = empty($title) ? $filename : $title;
$image->setAttribute('alt', $alt);
$image->setAttribute('title', $title);
}
$html = $this->html_insidebody($document);
return $html;
}
public function get_external_xml ($identifier) {
$xpath = cc2moodle::newx_path(cc2moodle::$manifest, cc2moodle::$namespaces);
$files = $xpath->query('/imscc:manifest/imscc:resources/imscc:resource[@identifier="'.
$identifier.'"]/imscc:file/@href');
if (empty($files)) {
$response = '';
} else {
$response = $files->item(0)->nodeValue;
}
return $response;
}
public function move_files($files, $destination_folder) {
global $CFG, $OUTPUT;
if (!empty($files)) {
foreach ($files as $file) {
$source = cc2moodle::$path_to_manifest_folder . DIRECTORY_SEPARATOR . $file;
$destination = $destination_folder . DIRECTORY_SEPARATOR . $file;
$destination_directory = dirname($destination);
cc2moodle::log_action('Copy the file: ' . $source . ' to ' . $destination);
if (!file_exists($destination_directory)) {
mkdir($destination_directory, $CFG->directorypermissions, true);
}
$copy_success = true;
if (is_file($source)) {
$copy_success = @copy($source, $destination);
}
if (!$copy_success) {
echo $OUTPUT->notification('WARNING: Cannot copy the file ' . $source . ' to ' . $destination);
cc2moodle::log_action('Cannot copy the file ' . $source . ' to ' . $destination, false);
}
}
}
}
protected function get_all_files () {
global $CFG;
$all_files = array();
$xpath = cc2moodle::newx_path(cc2moodle::$manifest, cc2moodle::$namespaces);
foreach (cc2moodle::$restypes as $type) {
$files = $xpath->query('/imscc:manifest/imscc:resources/imscc:resource[@type="' . $type . '"]/imscc:file/@href');
if (!empty($files) && ($files->length > 0)) {
foreach ($files as $file) {
// Omit html files.
$ext = strtolower(pathinfo($file->nodeValue, PATHINFO_EXTENSION));
if (in_array($ext, array('html', 'htm', 'xhtml'))) {
continue;
}
$all_files[] = $file->nodeValue;
}
}
unset($files);
}
// Are there any labels?
$xquery = "//imscc:item/imscc:item/imscc:item[imscc:title][not(@identifierref)]";
$labels = $xpath->query($xquery);
if (!empty($labels) && ($labels->length > 0)) {
$tname = 'course_files';
$dpath = cc2moodle::$path_to_manifest_folder . DIRECTORY_SEPARATOR . $tname;
$rfpath = 'files.gif';
$fpath = $dpath . DIRECTORY_SEPARATOR . $rfpath;
if (!file_exists($dpath)) {
mkdir($dpath, $CFG->directorypermissions, true);
}
// Copy the folder.gif file.
$folder_gif = "{$CFG->dirroot}/pix/i/files.gif";
copy($folder_gif, $fpath);
$all_files[] = $rfpath;
}
$all_files = empty($all_files) ? '' : $all_files;
return $all_files;
}
public function move_all_files() {
$files = $this->get_all_files();
if (!empty($files)) {
$this->move_files($files, cc2moodle::$path_to_manifest_folder . DIRECTORY_SEPARATOR . 'course_files', true);
}
}
/**
* @param string $html
* @return DOMDocument
*/
private function load_html($html) {
// Need to make sure that the html passed has charset meta tag.
$metatag = '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
if (strpos($html, $metatag) === false) {
$html = '<html><head>'.$metatag.'</head><body>'.$html.'</body></html>';
}
$document = new DOMDocument();
@$document->loadHTML($html);
return $document;
}
/**
* @param DOMDocument $domdocument
* @return string
*/
private function html_insidebody($domdocument) {
$html = '';
$bodyitems = $domdocument->getElementsByTagName('body');
if ($bodyitems->length > 0) {
$body = $bodyitems->item(0);
$html = str_ireplace(array('<body>', '</body>'), '', $body->C14N());
}
return $html;
}
public function generate_random_string ($length = 6) {
$response = '';
$source = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
if ($length > 0) {
$response = '';
$source = str_split($source, 1);
for ($i = 1; $i <= $length; $i++) {
$num = mt_rand(1, count($source));
$response .= $source[$num - 1];
}
}
return $response;
}
public function truncate_text($text, $max, $remove_html) {
if ($max > 10) {
$text = substr($text, 0, ($max - 6)) . ' [...]';
} else {
$text = substr($text, 0, $max);
}
$text = $remove_html ? strip_tags($text) : $text;
return $text;
}
}