<?php
/**
 * Example of retrieving an authentication token of the Twitter service
 *
 * PHP version 5.4
 *
 * @author     David Desberg <david@daviddesberg.com>
 * @author     Pieter Hordijk <info@pieterhordijk.com>
 * @copyright  Copyright (c) 2012 The authors
 * @license    http://www.opensource.org/licenses/mit-license.html  MIT License
 */
use OAuth\OAuth1\Signature\Signature;
use OAuth\OAuth1\Service\Twitter;
use OAuth\Common\Storage\Session;
use OAuth\Common\Consumer\Credentials;
use OAuth\Common\Http\Uri\Uri;

/**
 * Bootstrap the example
 */
require_once __DIR__ . '/bootstrap.php';

// We need to use a persistent storage to save the token, because oauth1 requires the token secret received before'
// the redirect (request token request) in the access token request.
$storage = new Session();

// Setup the credentials for the requests
$credentials = new Credentials(
    $servicesCredentials['twitter']['key'],
    $servicesCredentials['twitter']['secret'],
    $currentUri->getAbsoluteUri()
);

// Instantiate the twitter service using the credentials, http client and storage mechanism for the token
/** @var $twitterService Twitter */
$twitterService = $serviceFactory->createService('twitter', $credentials, $storage);

if( !empty( $_GET['oauth_token'] ) ) {
    $token = $storage->retrieveAccessToken('Twitter');
    // This was a callback request from twitter, get the token
    $twitterService->requestAccessToken( $_GET['oauth_token'], $_GET['oauth_verifier'], $token->getRequestTokenSecret() );

    // Send a request now that we have access token
    $result = json_decode( $twitterService->request( 'account/verify_credentials.json') );

    echo 'result: <pre>' . print_r($result, true) . '</pre>';

} elseif( !empty($_GET['go'] ) && $_GET['go'] == 'go' ) {
    // extra request needed for oauth1 to request a request token :-)
    $token = $twitterService->requestRequestToken();

    $url = $twitterService->getAuthorizationUri(array('oauth_token' => $token->getRequestToken()));
    header('Location: ' . $url);
} else {
    $url = $currentUri->getRelativeUri() . '?go=go';
    echo "<a href='$url'>Login with Twitter!</a>";
}
