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<?php
namespace Courseware\BlockTypes;
/**
* This class represents the content of a Courseware text block.
*
* @author Ron Lucke <lucke@elan-ev.de>
* @license GPL2 or any later version
*
* @since Stud.IP 5.0
*/
class Text extends BlockType
{
public static function getType(): string
{
return 'text';
}
public static function getTitle(): string
{
return _('Text');
}
public static function getDescription(): string
{
return _('Erstellen von Inhalten mit dem WYSIWYG-Editor.');
}
public function initialPayload(): array
{
return ['text' => ''];
}
public function getPayload()
{
$payload = parent::getPayload();
$payload['text'] = \Studip\Markup::purifyHtml(\Studip\Markup::markAsHtml($payload['text']));
return $payload;
}
public function setPayload($payload): void
{
$document = new \DOMDocument();
$old_libxml_error = libxml_use_internal_errors(true);
if (!empty($payload['text'])) {
$document->loadHTML($payload['text']);
libxml_use_internal_errors($old_libxml_error);
$imageElements = $document->getElementsByTagName('img');
foreach ($imageElements as $element) {
if (!$element instanceof \DOMElement || !$element->hasAttribute('src')) {
continue;
}
$src = $element->getAttribute('src');
if (str_contains($src, 'sendfile.php') && !str_contains($src, $GLOBALS['ABSOLUTE_URI_STUDIP'])) {
$find = explode('sendfile.php', $src)[0];
$payload['text'] = str_replace($find, $GLOBALS['ABSOLUTE_URI_STUDIP'], $payload['text']);
}
}
}
$payload['text'] = \Studip\Markup::purifyHtml(\Studip\Markup::markAsHtml($payload['text']));
parent::setPayload($payload);
}
public static function getJsonSchema(): string
{
$schemaFile = __DIR__.'/Text.json';
return file_get_contents($schemaFile);
}
/**
* get all files related to this block.
*
* @return \FileRef[] list of file references realted to this block
*/
public function getFiles(): array
{
$payload = $this->getPayload();
$document = new \DOMDocument();
$files = [];
if ($payload['text']) {
$old_libxml_error = libxml_use_internal_errors(true);
$document->loadHTML($payload['text']);
libxml_use_internal_errors($old_libxml_error);
$imageElements = $document->getElementsByTagName('img');
foreach ($imageElements as $element) {
if (!$element instanceof \DOMElement || !$element->hasAttribute('src')) {
continue;
}
$file = $this->extractFile($element->getAttribute('src'));
if ($file !== null) {
$files[] = $file;
}
}
}
return $files;
}
public function copyPayload(string $rangeId = ''): array
{
$payload = $this->getPayload();
$document = new \DOMDocument();
if ($payload['text']) {
$document->loadHTML(mb_convert_encoding($payload['text'], 'HTML-ENTITIES', 'UTF-8'));
$imageElements = $document->getElementsByTagName('img');
foreach ($imageElements as $element) {
if (!$element instanceof \DOMElement || !$element->hasAttribute('src')) {
continue;
}
$file = $this->extractFile($element->getAttribute('src'));
if ($file !== null) {
$file_copy_id = $this->copyFileById($file->id, $rangeId);
if ($file_copy_id) {
$element->setAttribute('src', \FileRef::find($file_copy_id)->getDownloadURL());
}
}
}
$payload['text'] = $document->saveHTML();
}
return $payload;
}
public static function getCategories(): array
{
return ['text'];
}
public static function getContentTypes(): array
{
return ['text'];
}
public static function getFileTypes(): array
{
return [];
}
public static function getTags(): array
{
return [
_('Text'), _('Bild'), _('schreiben'), _('WYSIWIG'), _('eintippen'),
_('Editor'), _('Eingabe'), _('Eingabefeld'), _('Skript'), _('einfügen'),
_('Foto'), _('Inhalt'), _('Tabelle'), _('Inhalt erstellen'),
_('Veranschaulichung'), _('Visualisierung'), 'png', 'jpg', 'gif',
];
}
/**
* Calls a callback if a given URL is an internal URL.
*
* @param string $url The url to check
* @param callable $callback A callable to execute
*
* @return mixed The return value of the callback or null if the callback
* is not executed
*/
private function applyCallbackOnInternalUrl($url, $callback)
{
if (! \Studip\MarkupPrivate\MediaProxy\isInternalLink($url)) {
return null;
}
$components = parse_url($url);
if (
isset($components['path'])
&& substr($components['path'], -13) == '/sendfile.php'
&& isset($components['query'])
&& $components['query'] != ''
) {
parse_str($components['query'], $queryParams);
return $callback($components, $queryParams);
}
return null;
}
private function extractFile($url)
{
return $this->applyCallbackOnInternalUrl($url, function ($components, $queryParams) {
if (isset($queryParams['file_id'])) {
$file_ref = new \FileRef($queryParams['file_id']);
return $file_ref;
}
return null;
});
}
}
|
