/**
* Return server instance of GoogleAnalytics
* @link https://developers.google.com/identity/protocols/OAuth2ServiceAccount
*
* @param array $account Service account parameters
*
* @return GoogleAnalytics
* @throw Exception if $account is not valid
*/
public static function createFromServiceAccount($account)
{
if (empty($account)) {
throw new Exception("Invalid account");
}
if (is_string($account)) {
if (!is_file($account)) {
throw new Exception("Invalid account file path");
}
$account = json_decode(file_get_contents($account));
}
if (empty($account->client_email) || empty($account->token_uri) || empty($account->private_key)) {
throw new Exception("Invalid account");
}
$now = time();
$data = array('iss' => $account->client_email, 'scope' => "https://www.googleapis.com/auth/analytics.readonly", 'aud' => $account->token_uri, 'exp' => $now + 3600, 'iat' => $now);
$jwt = RestClient::createJwt($data, $account->private_key);
$params = array('grant_type' => "urn:ietf:params:oauth:grant-type:jwt-bearer", 'assertion' => $jwt);
$restClient = new RestClient();
$token = $restClient->curl($account->token_uri, "POST", $params);
$token = json_decode($token);
return new self(array('authMode' => "bearer", 'token' => $token->access_token));
}
