/**
* Adds UUID data attributes to all elements in the document, skipping cdata blocks.
* @param $html html source
* @return string
*/
public function applyElementUuids($html)
{
//remove CDATA blocks from source and replace with tokens
$cdata = array();
$html = preg_replace_callback('/<!\\[CDATA\\[((?:[^]]|\\](?!\\]>))*)\\]\\]>/', function ($matches) use(&$cdata) {
$index = count($cdata);
$replacement = "{{{CDATA-{$index}" . "}}}";
$cdata[$index] = $matches[0];
return $replacement;
}, $html);
//Add uuid attribute to all tags
$content = preg_replace_callback("/(<([\\w]+)[^>]*>)/", function ($matches) {
if (strpos($matches[0], 'data-chaucer-element-id') === false) {
$id = Uuid::v4();
$search = '<' . $matches[2];
$replace = '<' . $matches[2] . ' data-chaucer-element-id="' . $id . '"';
return str_replace($search, $replace, $matches[0]);
}
return $matches[0];
}, $html);
//Put CDATA blocks back into source
if (count($cdata) > 0) {
for ($x = 0; $x < count($cdata); $x++) {
$search = "{{{CDATA-{$x}" . "}}}";
$content = str_replace($search, $cdata[$x], $content);
}
}
return $content;
}
/**
* @brief Generates a Universally Unique IDentifier, version 1, 3, 4 or 5.
*
* This function generates a truly random UUID. The built in CakePHP String::uuid() function
* is not cryptographically secure. You should uses this function instead.
*
* @see http://tools.ietf.org/html/rfc4122#section-4.4
* @see http://en.wikipedia.org/wiki/UUID
* @return string A UUID, made up of 32 hex digits and 4 hyphens.
*/
function generate($version = null, $ns = null, $name = null)
{
if ($version == null) {
$version = $this->version;
}
switch ($version) {
case Uuid::UUID_V1:
return Uuid::v1();
case Uuid::UUID_V3:
return Uuid::v3($ns, $name);
case Uuid::UUID_V4:
return Uuid::v4();
case Uuid::UUID_V5:
return Uuid::v5($ns, $name);
}
}
