index.php

<?php

// Include init file
require_once ('init.php');

// Initialize user class
$user = new User();
$output = '';

// Initialize GitHub Client class
$gitClient = new Github_OAuth_Client(
    array(
        'CLIENT_ID'     => CLIENT_ID,
        'CLIENT_SECRET' => CLIENT_SECRET,
        'REDIRECT_URL'  => REDIRECT_URL
    )
);

if(isset($accessToken))
{
    /**
     * ETAPE 3. Validation du profil GitHub
     */

    // Get the user profile data from GitHub
    $gitUser = $gitClient->getAuthenticatedUser($accessToken);

    if( !empty($gitUser) )
    {
        // Getting user profile details
        $gitUserData                    = array();
        $gitUserData['oauth_uid']       = !empty($gitUser->id)?$gitUser->id:'';
        $gitUserData['name']            = !empty($gitUser->name)?$gitUser->name:'';
        $gitUserData['username']        = !empty($gitUser->login)?$gitUser->login:'';
        $gitUserData['email']           = !empty($gitUser->email)?$gitUser->email:'';
        $gitUserData['location']        = !empty($gitUser->location)?$gitUser->location:'';
        $gitUserData['picture']         = !empty($gitUser->avatar_url)?$gitUser->avatar_url:'';
        $gitUserData['link']            = !empty($gitUser->html_url)?$gitUser->html_url:'';

        $gitUserData['oauth_provider'] = 'github';

        // Insert or update user data to the database
        $userData = $user->checkUser($gitUserData);

        // Storing user data in the session
        $_SESSION['userData'] = $userData;

        // Render Github profile data
        $output     = '<h2>GitHub Account Details</h2>';
        $output .= '<div class="ac-data">';
        $output .= '<img src="'.$userData['picture'].'">';
        $output .= '<p><b>ID:</b> '.$userData['oauth_uid'].'</p>';
        $output .= '<p><b>Name:</b> '.$userData['name'].'</p>';
        $output .= '<p><b>Login Username:</b> '.$userData['username'].'</p>';
        $output .= '<p><b>Email:</b> '.$userData['email'].'</p>';
        $output .= '<p><b>Location:</b> '.$userData['location'].'</p>';
        $output .= '<p><b>Profile Link:</b> <a href="'.$userData['link'].'" target="_blank">Click to visit GitHub page</a></p>';
        $output .= '<p>Logout from <a href="logout.php">GitHub</a></p>';
        $output .= '</div>';
    }else{
        $output = '<h3 style="color:red">Something went wrong, please try again!</h3>';
    }

}elseif( isset($_GET['code']) )
{
    /**
     * ETAPE 2. Récupération du code fourni par GitHub
     */

    // *****
    // Debug
    // *****
    $log = "\nEtape 2:\n";
    $log .= "Reçu:\n";
    $log .= "    code " . $_GET['code'] . "\n";
    $log .= "    state " . $_GET['state'] . "\n";

    $log .= "Session:\n";
    $log .= "    state " . $_SESSION['state'] . "\n";

    file_put_contents(__DIR__ . '/var/log/oauth.log', print_r($log, true), FILE_APPEND);
    // *****
    // Debug
    // *****


    // Verify the state matches the stored state
    if(!$_GET['state'] || $_SESSION['state'] != $_GET['state'])
    {
        header("Location: ".$_SERVER['PHP_SELF']);
    }

    // Exchange the auth code for a token
    $accessToken = $gitClient->getAccessToken($_GET['state'], $_GET['code']);

    $_SESSION['access_token'] = $accessToken;

    // *****
    // Debug
    // *****
    $log = "\nEtape 2.2:\n";
    $log .= "Génération AccessToken:\n";
    $log .= "    access_token " . $accessToken . "\n";

    file_put_contents(__DIR__ . '/var/log/oauth.log', print_r($log, true), FILE_APPEND);
    // *****
    // Debug
    // *****

    header('Location: ./');

}elseif( isset($_GET['purge']) ){

    // Purge de la base
    $user->purge();


    header('Location: ./');
}else{
    /**
     * ETAPE 1. Affiche le bouton de connexion
     */

    // Generate a random hash and store in the session for security
    $_SESSION['state'] = hash('sha256', microtime(TRUE) . rand() . $_SERVER['REMOTE_ADDR']);

    // Remove access token from the session
    unset($_SESSION['access_token']);

    // Get the URL to authorize
    $authUrl = $gitClient->getAuthorizeURL($_SESSION['state']);

    // Render Github login button
    $output = '<h1>Etape 1</h1><br><br><a href="'.htmlspecialchars($authUrl).'"><img src="images/github-login.png"></a>';

    // Display all existing users in database
    $output .= $user->displayAll();
}
?>

<div class="container">
    <!-- Display login button / GitHub profile information -->
    <?php echo $output; ?>
</div>