/**
* Process AJAX requests.
*
* @return Response
*/
public function checkLinkAvailability(Request $request)
{
$link_ending = $request->input('link_ending');
$ending_conforms = LinkHelper::validateEnding($link_ending);
if (!$ending_conforms) {
return "invalid";
} else {
if (LinkHelper::linkExists($link_ending)) {
// if ending already exists
return "unavailable";
} else {
return "available";
}
}
}
public static function createLink($long_url, $is_secret = false, $custom_ending = null, $link_ip = '127.0.0.1', $creator = false, $return_object = false)
{
/**
* Given parameters needed to create a link, generate appropriate ending and
* return formatted link.
*
* @param string $custom_ending
* @param boolean (optional) $is_secret
* @param string (optional) $custom_ending
* @param string $link_ip
* @param string $creator
* @return string $formatted_link
*/
$is_already_short = LinkHelper::checkIfAlreadyShortened($long_url);
if ($is_already_short) {
throw new \Exception('Sorry, but your link already
looks like a shortened URL.');
}
if (!$is_secret && !$custom_ending && ($existing_link = LinkHelper::longLinkExists($long_url))) {
// if link is not specified as secret, is non-custom, and
// already exists in Polr, lookup the value and return
return self::formatLink($existing_link);
}
if ($custom_ending) {
// has custom ending
$ending_conforms = LinkHelper::validateEnding($custom_ending);
if (!$ending_conforms) {
throw new \Exception('Sorry, but custom endings
can only contain alphanumeric characters');
}
$ending_in_use = LinkHelper::linkExists($custom_ending);
if ($ending_in_use) {
throw new \Exception('Sorry, but this URL ending is already in use.');
}
$link_ending = $custom_ending;
} else {
// no custom ending
$link_ending = LinkHelper::findSuitableEnding();
}
$link = new Link();
$link->short_url = $link_ending;
$link->long_url = $long_url;
$link->ip = $link_ip;
$link->is_custom = $custom_ending != null;
if ($creator) {
// if user is logged in, save user as creator
$link->creator = $creator;
}
if ($is_secret) {
$rand_bytes_num = intval(env('POLR_SECRET_BYTES'));
$secret_key = CryptoHelper::generateRandomHex($rand_bytes_num);
$link->secret_key = $secret_key;
} else {
$secret_key = false;
}
$link->save();
$formatted_link = self::formatLink($link_ending, $secret_key);
if ($return_object) {
return $link;
}
return $formatted_link;
}
