/**
 * Check for valid user via login form or stored cookie. Returns true or an error message
 *
 */
function yourls_is_valid_user()
{
    // Allow plugins to short-circuit the whole function
    $pre = yourls_apply_filter('shunt_is_valid_user', null);
    if (null !== $pre) {
        return $pre;
    }
    // $unfiltered_valid : are credentials valid? Boolean value. It's "unfiltered" to allow plugins to eventually filter it.
    $unfiltered_valid = false;
    // Logout request
    if (isset($_GET['action']) && $_GET['action'] == 'logout') {
        yourls_do_action('logout');
        yourls_store_cookie(null);
        return yourls__('Logged out successfully');
    }
    // Check cookies or login request. Login form has precedence.
    yourls_do_action('pre_login');
    // Determine auth method and check credentials
    if (yourls_is_API() && isset($_REQUEST['timestamp']) && !empty($_REQUEST['timestamp']) && isset($_REQUEST['signature']) && !empty($_REQUEST['signature'])) {
        yourls_do_action('pre_login_signature_timestamp');
        $unfiltered_valid = yourls_check_signature_timestamp();
    } elseif (yourls_is_API() && !isset($_REQUEST['timestamp']) && isset($_REQUEST['signature']) && !empty($_REQUEST['signature'])) {
        yourls_do_action('pre_login_signature');
        $unfiltered_valid = yourls_check_signature();
    } elseif (isset($_REQUEST['username']) && isset($_REQUEST['password']) && !empty($_REQUEST['username']) && !empty($_REQUEST['password'])) {
        yourls_do_action('pre_login_username_password');
        $unfiltered_valid = yourls_check_username_password();
    } elseif (!yourls_is_API() && isset($_COOKIE[yourls_cookie_name()])) {
        yourls_do_action('pre_login_cookie');
        $unfiltered_valid = yourls_check_auth_cookie();
    }
    // Regardless of validity, allow plugins to filter the boolean and have final word
    $valid = yourls_apply_filter('is_valid_user', $unfiltered_valid);
    // Login for the win!
    if ($valid) {
        yourls_do_action('login');
        // (Re)store encrypted cookie if needed
        if (!yourls_is_API()) {
            yourls_store_cookie(YOURLS_USER);
            // Login form : redirect to requested URL to avoid re-submitting the login form on page reload
            if (isset($_REQUEST['username']) && isset($_REQUEST['password']) && isset($_SERVER['REQUEST_URI'])) {
                $url = $_SERVER['REQUEST_URI'];
                yourls_redirect($url);
            }
        }
        // Login successful
        return true;
    }
    // Login failed
    yourls_do_action('login_failed');
    if (isset($_REQUEST['username']) || isset($_REQUEST['password'])) {
        return yourls__('Invalid username or password');
    } else {
        return yourls__('Please log in');
    }
}

function temp_instead_function($args)
{
    $url = $args[0];
    $code = $args[1];
    $match = strpos($url, yourls_site_url(false));
    $mode = intval(yourls_get_option('temp_instead_mode', 1));
    // We check here if the url contains the YOURLS installation address,
    // and if it doesn't we'll return a 302 redirect if it isn't getting
    // one already.
    if ($code != 302 && ($mode == 1 || $match === false && $mode == 3)) {
        yourls_redirect($url, 302);
    }
    // We check here if the url contains the YOURLS installation address,
    // and if it does we'll return a 301 redirect if it isn't getting
    // one already.
    if ($code != 301 && ($mode == 2 || $match !== false && $mode == 3)) {
        yourls_redirect($url, 301);
    }
}

    yourls_redirect(YOURLS_SITE, 302);
}
// Get basic infos for this shortened URL
$keyword = yourls_sanitize_string($keyword);
$longurl = yourls_get_keyword_longurl($keyword);
$clicks = yourls_get_keyword_clicks($keyword);
$timestamp = yourls_get_keyword_timestamp($keyword);
$title = yourls_get_keyword_title($keyword);
// Update title if it hasn't been stored yet
if ($title == '') {
    $title = yourls_get_remote_title($longurl);
    yourls_edit_link_title($keyword, $title);
}
if ($longurl === false) {
    yourls_do_action('infos_keyword_not_found');
    yourls_redirect(YOURLS_SITE, 302);
}
yourls_do_action('pre_yourls_infos', $keyword);
if (yourls_do_log_redirect()) {
    $table = YOURLS_DB_TABLE_LOG;
    $referrers = array();
    $direct = $notdirect = 0;
    $countries = array();
    $dates = array();
    $list_of_days = array();
    $list_of_months = array();
    $list_of_years = array();
    $last_24h = array();
    // Define keyword query range : either a single keyword or a list of keywords
    if ($aggregate) {
        $keyword_list = yourls_get_longurl_keywords($longurl);

    yourls_db_connect();
}
// Allow early inclusion of a cache layer
if (file_exists(YOURLS_USERDIR . '/cache.php')) {
    require_once YOURLS_USERDIR . '/cache.php';
}
// Read options right from start
yourls_get_all_options();
// Register shutdown function
register_shutdown_function('yourls_shutdown');
// Core now loaded
yourls_do_action('init');
// plugins can't see this, not loaded yet
// Check if need to redirect to install procedure
if (!yourls_is_installed() && !yourls_is_installing()) {
    yourls_redirect(yourls_admin_url('install.php'), 302);
}
// Check if upgrade is needed (bypassed if upgrading or installing)
if (!yourls_is_upgrading() && !yourls_is_installing()) {
    if (yourls_upgrade_is_needed()) {
        yourls_redirect(YOURLS_SITE . '/admin/upgrade.php', 302);
    }
}
// Init all plugins
yourls_load_plugins();
yourls_do_action('plugins_loaded');
// Is there a new version of YOURLS ?
yourls_new_core_version_notice();
if (yourls_is_admin()) {
    yourls_do_action('admin_init');
}

             $return['errorCode'] = 400;
             $return['message'] = yourls_s('Short URL created, but could not redirect to %s !', 'Twitter');
             break;
         case 'facebook':
             // share with Facebook
             $destination = sprintf("https://www.facebook.com/sharer/sharer.php?u=%s&t=%s", urlencode($return['shorturl']), urlencode($title));
             yourls_redirect($destination, 303);
             // Deal with the case when redirection failed:
             $return['status'] = 'error';
             $return['errorCode'] = 400;
             $return['message'] = yourls_s('Short URL created, but could not redirect to %s !', 'Facebook');
             break;
         case 'tumblr':
             // share with Tumblr
             $destination = sprintf("https://www.tumblr.com/share?v=3&u=%s&t=%s&s=%s", urlencode($return['shorturl']), urlencode($title), urlencode($text));
             yourls_redirect($destination, 303);
             // Deal with the case when redirection failed:
             $return['status'] = 'error';
             $return['errorCode'] = 400;
             $return['message'] = yourls_s('Short URL created, but could not redirect to %s !', 'Tumblr');
             break;
         default:
             // Is there a custom registered social bookmark?
             yourls_do_action('share_redirect_' . $_GET['share'], $return);
             // Still here? That was an unknown 'share' method, then.
             $return['status'] = 'error';
             $return['errorCode'] = 400;
             $return['message'] = yourls__('Unknown "Share" bookmarklet');
             break;
     }
 }

    $error_msg = "Signed off.";
}
if (!isLogged()) {
    yourls_html_head('login');
    mu_html_menu();
    // Login form
    switch ($act) {
        case "login":
            $username = yourls_escape($_POST['username']);
            $password = $_POST['password'];
            if (!empty($username) && !empty($password)) {
                if (isValidUser($username, $password)) {
                    $token = getUserTokenByEmail($username);
                    $id = getUserIdByToken($token);
                    $_SESSION['user'] = array("id" => $id, "user" => $username, "token" => $token);
                    yourls_redirect("index.php");
                } else {
                    $error_msg = "Problems to login.";
                    require_once 'form.php';
                }
            }
            break;
        case "joinform":
            require_once 'formjoin.php';
            break;
        case "join":
            $username = yourls_escape($_POST['username']);
            $password = $_POST['password'];
            if (captchaEnabled()) {
                require_once 'recaptchalib.php';
                $privatekey = YOURLS_MULTIUSER_CAPTCHA_PRIVATE_KEY;

function authmgr_require_capability($capability)
{
    if (!authmgr_have_capability($capability)) {
        // TODO: display a much nicer error page
        //die('Sorry, you are not authorized for the action: '.$capability);
        yourls_redirect(yourls_admin_url('?access=denied'), 302);
        die;
    }
}

    yourls_verify_nonce('manage_plugins', $_REQUEST['nonce']);
    // Check plugin file is valid
    if (isset($_GET['plugin']) && yourls_validate_plugin_file(YOURLS_PLUGINDIR . '/' . $_GET['plugin'] . '/plugin.php')) {
        global $ydb;
        // Activate / Deactive
        switch ($_GET['action']) {
            case 'activate':
                $result = yourls_activate_plugin($_GET['plugin'] . '/plugin.php');
                if ($result === true) {
                    yourls_redirect(yourls_admin_url('plugins.php?success=activated'), 302);
                }
                break;
            case 'deactivate':
                $result = yourls_deactivate_plugin($_GET['plugin'] . '/plugin.php');
                if ($result === true) {
                    yourls_redirect(yourls_admin_url('plugins.php?success=deactivated'), 302);
                }
                break;
            default:
                $result = 'Unsupported action';
                break;
        }
    } else {
        $result = 'No plugin specified, or not a valid plugin';
    }
    yourls_add_notice($result);
}
// Handle message upon succesfull (de)activation
if (isset($_GET['success'])) {
    if ($_GET['success'] == 'activated' or $_GET['success'] == 'deactivated') {
        yourls_add_notice('Plugin ' . $_GET['success']);

        } else {
            echo "<p>No referrer data.</p>";
        }
        ?>
				
		</div>
	
	<?php 
    }
    // endif do log redirect
    ?>
	
	
		<div id="stat_tab_share" class="tab">
			<h2>Share</h2>
			
			<?php 
    yourls_share_box($longurl, yourls_link($keyword), '', '', '<h3>Short link</h3>', '<h3>Quick Share</h3>');
    ?>
	
		</div>
		
	</div>
	

<?php 
    yourls_html_footer();
    die;
} else {
    yourls_redirect(YOURLS_SITE, 401);
}