/**
* Validate Html
* This method scans the outgoing HTML for any forms, if found it will save the form to the session in order to validate.
* If any errors previously existed in the session, this method will apply `bootstrap` style css error classes.
* @pararm string &$htmlDocument - The outgoing HTML string
* @return VOID
*/
private function validateHtml(&$htmlDocument)
{
if (!empty($htmlDocument)) {
$dom = new DOMDocument();
$dom->loadHtml($htmlDocument, LIBXML_NOWARNING | LIBXML_NOERROR | LIBXML_NOENT | LIBXML_HTML_NOIMPLIED);
//Automatically apply an active class to links that relate to the current URL
foreach ($dom->getElementsByTagName('a') as $link) {
if (Router::isSiteUrl($href = Router::relativeURL($link->getAttribute("href")))) {
$currentClasses = explode(" ", $link->getAttribute("class"));
if (strcasecmp($href, $this->controller->request()->url()) == 0) {
$currentClasses[] = 'active';
}
if (strpos($this->controller->request()->url(), $href) === 0) {
$currentClasses[] = 'child-active';
}
$link->setAttribute('class', implode(" ", $currentClasses));
}
}
//Save the outgoing form elements for future validation.
foreach ($dom->getElementsByTagName('form') as $form) {
$savedom = new \DOMDocument();
if ($formAction = $form->getAttribute("action") && !Router::isSiteUrl($formAction)) {
continue;
}
//Add CSRF
$rand = function_exists('random_bytes') ? random_bytes(32) : null;
$rand = !$rand && function_exists('mcrypt_create_iv') ? mcrypt_create_iv(32, MCRYPT_DEV_URANDOM) : $rand;
$rand = $rand ? $rand : openssl_random_pseudo_bytes(32);
$csrfToken = bin2hex($rand);
$formName = $form->getAttribute("name");
$formNameToken = $formName . "_" . $csrfToken;
$csrf = $dom->createDocumentFragment();
$csrf->appendXML(HTML::input()->attr("type", "hidden")->attr("name", "tb_form_token")->attr("value", $formNameToken)->attr("readonly", true));
$form->insertBefore($csrf, $form->firstChild);
//TODO: Should we assume the form will allways have content
foreach (["input", "textarea", "select"] as $tag) {
foreach ($form->getElementsByTagName($tag) as $input) {
$savedom->appendChild($savedom->importNode($input->cloneNode()));
//Populate form with previous data
if (($newValue = SessionStore::get("touchbase.key.session.post")->get($input->getAttribute("name"), false)) !== false) {
if (is_scalar($newValue) && $input->getAttribute("type") !== "hidden" && !$input->hasAttribute("readonly")) {
$input->setAttribute('value', $newValue);
}
}
//Populate errors
if ($errorMessage = $this->controller->errors($formName)->get($input->getAttribute("name"), false)) {
$currentClasses = explode(" ", $input->parentNode->getAttribute("class"));
foreach (["has-feedback", "has-error"] as $class) {
if (!in_array($class, $currentClasses)) {
$currentClasses[] = $class;
}
}
$input->parentNode->setAttribute('class', implode(" ", $currentClasses));
$input->setAttribute("data-error", $errorMessage);
}
}
}
SessionStore::recycle($formName, $formNameToken, base64_encode(gzdeflate($savedom->saveHTML(), 9)));
}
//Move body scripts to bottom
$bodies = $dom->getElementsByTagName('body');
$body = $bodies->item(0);
if ($body) {
foreach ($body->getElementsByTagName('script') as $script) {
if ($script->parentNode->nodeName === "body") {
break;
}
$body->appendChild($dom->importNode($script));
}
}
//Look for the special attribute that moves nodes.
//This is useful for moving modals from the template files to the bottom output.
$xpath = new \DOMXPath($dom);
$appendToBodyRef = NULL;
foreach ($xpath->query("//*[@tb-append]") as $element) {
$appendTo = $xpath->query($element->getAttribute("tb-append"))->item(0);
$element->removeAttribute("tb-append");
if ($appendTo) {
if ($appendTo->nodeName === "body") {
//Special case to append above the included javascript files.
if (!$appendToBodyRef) {
$appendToBodyRef = $xpath->query('/html/body/comment()[. = " END CONTENT "][1]')->item(0);
}
$body->insertBefore($dom->importNode($element), $appendToBodyRef);
} else {
$appendTo->appendChild($dom->importNode($element));
}
}
}
//Save the HTML with the updates.
if ($this->controller->request()->isAjax() || !$this->controller->request()->isMainRequest()) {
//This will remove the doctype that's automatically appended.
$htmlDocument = $dom->saveHTML($dom->documentElement);
} else {
$htmlDocument = $dom->saveHTML();
}
}
}
