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<?php

if (!array_key_exists('stateid', $_REQUEST)) {
        throw new Exception('State Lost - not returned by MySpace Auth');
}
$state = SimpleSAML_Auth_State::loadState($_REQUEST['stateid'], sspmod_authmyspace_Auth_Source_MySpace::STAGE_INIT);

if (array_key_exists('oauth_problem', $_REQUEST)) {
        // oauth_problem of 'user_refused' means user chose not to login with MySpace
        if (strcmp($_REQUEST['oauth_problem'],'user_refused') == 0) {
                $e = new SimpleSAML_Error_UserAborted();
                SimpleSAML_Auth_State::throwException($state, $e);
        }

        // Error
        $e = new SimpleSAML_Error_Error('Authentication failed: ' . $_REQUEST['oauth_problem']);
        SimpleSAML_Auth_State::throwException($state, $e);
}

if (array_key_exists('oauth_verifier', $_REQUEST)) {
        $state['authmyspace:oauth_verifier'] = $_REQUEST['oauth_verifier'];
} else {
        throw new Exception('OAuth verifier not returned.');;
}

// Find authentication source
assert('array_key_exists(sspmod_authmyspace_Auth_Source_MySpace::AUTHID, $state)');
$sourceId = $state[sspmod_authmyspace_Auth_Source_MySpace::AUTHID];

$source = SimpleSAML_Auth_Source::getById($sourceId);
if ($source === NULL) {
        throw new Exception('Could not find authentication source with id ' . $sourceId);
}

$source->finalStep($state);

SimpleSAML_Auth_Source::completeAuth($state);