$l10n = new OC_L10N('contacts');
// Check if we are a user
OC_JSON::checkLoggedIn();
OC_JSON::checkAppEnabled('contacts');
$card = OC_Contacts_VCard::find($id);
if ($card === false) {
    OC_JSON::error(array('data' => array('message' => $l10n->t('Contact could not be found.'))));
    exit;
}
$addressbook = OC_Contacts_Addressbook::find($card['addressbookid']);
if ($addressbook === false || $addressbook['userid'] != OC_USER::getUser()) {
    OC_JSON::error(array('data' => array('message' => $l10n->t('This is not your contact.'))));
    exit;
}
$vcard = OC_Contacts_VCard::parse($card['carddata']);
// Check if the card is valid
if (is_null($vcard)) {
    OC_JSON::error(array('data' => array('message' => $l10n->t('vCard could not be read.'))));
    exit;
}
$name = $_POST['name'];
$value = $_POST['value'];
$parameters = isset($_POST['parameteres']) ? $_POST['parameters'] : array();
$property = OC_Contacts_VCard::addVCardProperty($vcard, $name, $value, $parameters);
$line = count($vcard->children) - 1;
$checksum = md5($property->serialize());
OC_Contacts_VCard::edit($id, $vcard->serialize());
$tmpl = new OC_Template('contacts', 'part.property');
$tmpl->assign('property', OC_Contacts_VCard::structureProperty($property, $line));
$page = $tmpl->fetchPage();
OC_JSON::success(array('data' => array('page' => $page)));