/**
* Get the {@link OAuth2Providers} for the Github
* authentication handler.
*
* @param $redirect the `redirectUri` to provide the provider.
* @return A {@link OAuth2Providers}
*/
static function github($redirect)
{
if (!$redirect) {
throw new \InvalidArgumentException("No redirect provided.");
}
return new OAuth2Providers('github', OAuth2Providers::loadProvider("github", $redirect));
}
/**
* @throws UserSignupException if the user could not be signed up, with a reason
* @throws UserAlreadyExistsException if the identity already exists in the database
*/
static function addIdentity(\Db\Connection $db, User $user, OAuth2Providers $provider)
{
if (!$user) {
throw new \InvalidArgumentException("No user provided.");
}
$identity = UserOAuth2::auth($provider->getProvider());
if (!$identity) {
throw new UserSignupException("Could not login with OAuth2.");
}
$uid = $identity->uid;
if (!$uid) {
throw new UserSignupException("No UID found.");
}
// does such an identity already exist?
$q = $db->prepare("SELECT * FROM user_oauth2_identities WHERE provider=? AND uid=? LIMIT 1");
$q->execute(array($provider->getKey(), $uid));
if ($q->fetch()) {
throw new UserAlreadyExistsException("That OAuth2 identity is already in use.");
}
// create a new identity
$q = $db->prepare("INSERT INTO user_oauth2_identities SET user_id=?, provider=?, uid=?");
$q->execute(array($user->getId(), $provider->getKey(), $uid));
return true;
}