public function postPhoto($path, $caption = null)
{
if (!$this->isLoggedIn()) {
throw new InstagramException("You must be logged in to call postPhoto().");
}
$request = new PhotoUploadRequest($this, $path);
$response = $request->execute();
if (!$response->isOk()) {
throw new InstagramException(sprintf("Failed to Upload Photo: [%s] %s", $response->getStatus(), $response->getMessage()));
}
$request = new ConfigureMediaRequest($this, $response->getUploadId(), $path, $caption);
$response = $request->execute();
if (!$response->isOk()) {
throw new InstagramException(sprintf("Failed to Configure Media: [%s] %s", $response->getStatus(), $response->getMessage()));
}
return $response;
}