public function createShortUrl(EventInterface $event)
{
$request = $event->getRequest();
$image = $request->getContent();
if (empty($image)) {
throw new InvalidArgumentException('Missing JSON data', 400);
} else {
$image = json_decode($image, true);
if ($image === null || json_last_error() !== JSON_ERROR_NONE) {
throw new InvalidArgumentException('Invalid JSON data', 400);
}
}
if (!isset($image['user']) || $image['user'] !== $request->getUser()) {
throw new InvalidArgumentException('Missing or invalid user', 400);
}
if (!isset($image['imageIdentifier']) || $image['imageIdentifier'] !== $request->getImageIdentifier()) {
throw new InvalidArgumentException('Missing or invalid image identifier', 400);
}
$extension = isset($image['extension']) ? strtolower($image['extension']) : null;
if ($extension !== null && !in_array($extension, ImageModel::$mimeTypes)) {
throw new InvalidArgumentException('Extension provided is not a recognized format', 400);
}
$queryString = isset($image['query']) ? $image['query'] : null;
if ($queryString) {
parse_str(urldecode(ltrim($queryString, '?')), $query);
} else {
$query = [];
}
$database = $event->getDatabase();
if (!$database->imageExists($image['user'], $image['imageIdentifier'])) {
throw new InvalidArgumentException('Image does not exist', 404);
}
// See if a short URL ID already exists the for given parameters
$exists = true;
$shortUrlId = $database->getShortUrlId($image['user'], $image['imageIdentifier'], $extension, $query);
if (!$shortUrlId) {
$exists = false;
do {
// No short URL exists, generate an ID and insert. If the generated short URL ID
// already exists, insert again.
$shortUrlId = $this->getShortUrlId();
} while ($database->getShortUrlParams($shortUrlId));
// We have an ID that does not already exist
$database->insertShortUrl($shortUrlId, $image['user'], $image['imageIdentifier'], $extension, $query);
}
// Attach the header
$model = new ArrayModel();
$model->setData(['id' => $shortUrlId]);
$event->getResponse()->setModel($model)->setStatusCode($exists ? 200 : 201);
}
