/**
* Validate the form
*
* @param array $data
* @return boolean
*/
public function isValid($data)
{
if (!parent::isValid($data)) {
return false;
}
$hasErrors = false;
$missingLabel = false;
$missingURI = false;
$duplicateURI = false;
$uids = array();
if ($pageLinks = $this->getValue(self::HIDDEN_ELEMENT_ID)) {
if ($pageLinks = json_decode($pageLinks, true)) {
foreach ($pageLinks as $pageLink) {
if (!$missingLabel && trim($pageLink['label']) == '') {
$this->addError('All navigation links must have both labels.');
$hasErrors = true;
$missingLabel = true;
}
if (!$missingURI && trim($pageLink['uri']) == '') {
$this->addError(__('All navigation links must have URIs.'));
$hasErrors = true;
$missingURI = true;
}
if (trim($pageLink['uri']) != '') {
try {
$page = new Omeka_Navigation_Page_Uri();
$page->setHref($pageLink['uri']);
$uid = $this->_nav->createPageUid($page->getHref());
if (!in_array($uid, $uids)) {
$uids[] = $uid;
} else {
if (!$duplicateURI) {
$this->addError(__('All navigation links must have different URIs.'));
$duplicateURI = true;
$hasErrors = true;
}
}
} catch (Omeka_Navigation_Page_Uri_Exception $e) {
$this->addError(__('Invalid URI for "%s" navigation link: "%s"', $pageLink['label'], $pageLink['uri']));
$hasErrors = true;
}
}
}
}
}
$hasErrors = $hasErrors || $this->_postHasDeletedUndeletablePage();
return !$hasErrors;
}