/**
* Hook executed before saving url_preview user type value. Checks and removes signature of the $value.
* If signature is correct, checks current user's access to $value.
*
* @param array $userField Array containing parameters of the user field.
* @param string $value Signed value of the user field.
* @return int Unsigned value of the user field, or null in case of errors.
*/
public static function onBeforeSave($userField, $value)
{
$imageUrl = null;
if (strpos($value, ';') !== false) {
list($value, $imageUrl) = explode(';', $value);
}
$signer = new Signer();
try {
$value = $signer->unsign($value, UrlPreview::SIGN_SALT);
} catch (SystemException $e) {
return null;
}
$metadata = UrlMetadataTable::getById($value)->fetch();
if (!is_array($metadata)) {
return null;
}
if ($metadata['TYPE'] === UrlMetadataTable::TYPE_STATIC) {
if ($imageUrl && is_array($metadata['EXTRA']['IMAGES']) && in_array($imageUrl, $metadata['EXTRA']['IMAGES'])) {
UrlPreview::setMetadataImage((int) $value, $imageUrl);
}
return $value;
} else {
if ($metadata['TYPE'] === UrlMetadataTable::TYPE_DYNAMIC && UrlPreview::checkDynamicPreviewAccess($metadata['URL'])) {
return $value;
}
}
return null;
}
/**
* Sets main image url for the metadata with given id.
* @param int $id Id of the metadata to set image url.
* @param string $imageUrl Url of the image.
* @return bool Returns true in case of successful update, or false otherwise.
* @throws ArgumentException
*/
public static function setMetadataImage($id, $imageUrl)
{
if (!is_int($id)) {
throw new ArgumentException("Id of the metadata must be an integer", "id");
}
if (!is_string($imageUrl) && !is_null($imageUrl)) {
throw new ArgumentException("Url of the image must be a string", "imageUrl");
}
$metadata = UrlMetadataTable::getList(array('select' => array('IMAGE', 'IMAGE_ID', 'EXTRA'), 'filter' => array('=ID' => $id)))->fetch();
if (isset($metadata['EXTRA']['IMAGES'])) {
$imageIndex = array_search($imageUrl, $metadata['EXTRA']['IMAGES']);
if ($imageIndex === false) {
unset($metadata['EXTRA']['SELECTED_IMAGE']);
} else {
$metadata['EXTRA']['SELECTED_IMAGE'] = $imageIndex;
}
}
if (static::getOptionSaveImages()) {
$metadata['IMAGE_ID'] = static::saveImage($imageUrl);
$metadata['IMAGE'] = null;
} else {
$metadata['IMAGE'] = $imageUrl;
$metadata['IMAGE_ID'] = null;
}
return UrlMetadataTable::update($id, $metadata)->isSuccess();
}