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<?php
class OpenID_Connect_Generic_Login_Form {
private $settings;
private $client_wrapper;
/**
* @param $settings
* @param $client_wrapper
*/
function __construct( $settings, $client_wrapper ){
$this->settings = $settings;
$this->client_wrapper = $client_wrapper;
// maybe set redirect cookie on formular page
add_action('login_form_login', [$this, 'handle_redirect_cookie']);
}
/**
* @param $settings
* @param $client_wrapper
*
* @return \OpenID_Connect_Generic_Login_Form
*/
static public function register( $settings, $client_wrapper ){
$login_form = new self( $settings, $client_wrapper );
// alter the login form as dictated by settings
add_filter( 'login_message', array( $login_form, 'handle_login_page' ), 99 );
// if WooCommerce is active, also insert logic for the shopping cart
if ( in_array( 'woocommerce/woocommerce.php',
apply_filters( 'active_plugins',
get_option( 'active_plugins' ) ) ) ) {
// show login form at the shopping cart (if not logged in)
add_action( 'woocommerce_before_checkout_billing_form',
array( $login_form, 'action_login_page' ) );
// Add action to set cookie to redirect back to current
// (checkout) page after OIDC provided the data
// (see similar add_action()
// above for the 'login_form_login' - we must do the
// same on the 'Billing details' page!)
add_action('woocommerce_before_checkout_billing_form',
array( $login_form, 'handle_redirect_cookie' ) );
// hook to convert OIDC fields to WC checkout fields if logged in
add_filter( 'woocommerce_checkout_fields',
array( $login_form,
'filter_checkout_get_value' ) );
}
// add a shortcode for the login button
add_shortcode( 'openid_connect_generic_login_button', array( $login_form, 'make_login_button' ) );
$login_form->handle_redirect_login_type_auto();
return $login_form;
}
/**
* Auto Login redirect
*/
function handle_redirect_login_type_auto(){
if ( $GLOBALS['pagenow'] == 'wp-login.php'
&& ( $this->settings->login_type == 'auto' || ! empty( $_GET['force_redirect'] ) )
&& ( ! isset( $_GET[ 'action' ] ) || $_GET[ 'action' ] !== 'logout' )
&& ! isset( $_POST['wp-submit'] ) ) {
if ( ! isset( $_GET['login-error'] ) ) {
$this->handle_redirect_cookie();
wp_redirect( $this->client_wrapper->get_authentication_url() );
exit;
}
else {
add_action( 'login_footer', array( $this, 'remove_login_form' ), 99 );
}
}
}
/**
* Handle login related redirects
*/
function handle_redirect_cookie() {
if ( $GLOBALS['pagenow'] == 'wp-login.php' && isset( $_GET[ 'action' ] ) && $_GET[ 'action' ] === 'logout' ) {
return;
}
// record the URL of this page if set to redirect back to origin page
if ( $this->settings->redirect_user_back ){
$redirect_expiry = current_time('timestamp') + DAY_IN_SECONDS;
// default redirect to the homepage
$redirect_url = home_url( esc_url( add_query_arg( null, null ) ) );
if ( $GLOBALS['pagenow'] == 'wp-login.php' ){
// if using the login form, default redirect to the admin dashboard
$redirect_url = admin_url();
if ( isset( $_REQUEST['redirect_to'] ) ){
$redirect_url = esc_url_raw( $_REQUEST[ 'redirect_to' ] );
}
}
$redirect_url = apply_filters( 'openid-connect-generic-cookie-redirect-url', $redirect_url );
setcookie( $this->client_wrapper->cookie_redirect_key, $redirect_url, $redirect_expiry, COOKIEPATH, COOKIE_DOMAIN, is_ssl() );
}
}
/**
* WooCommerce integration.
* Action to output the login button inside the "Billing details" form
* just before the user would otherwise manually enter their details.
*/
function action_login_page () {
$user = wp_get_current_user ();
if (0 == $user->ID) {
// ID 0 is used to indicate user is not logged in.
// Re-use filter logic to generate login page
print ( $this->handle_login_page ('') );
}
}
/**
* WooCommerce integration.
* Filter to transform (defaults) for the Billing details according to
* the information obtained from OpenID Connect (OIDC). WooCommerce
* already grabs many of the values properly, but there are some fields
* which we have to convert manually.
*/
function filter_checkout_get_value ($in=array())
{
echo "<pre>"; // DEBUG
echo "FCG for" . json_encode ($in) . "<br>\n"; // DEBUG
$user = wp_get_current_user ();
if (0 != $user->ID) {
$token_response = $user->get ('openid-connect-generic-last-user-claim');
echo "OIDC has: " . json_encode ( $token_response ); // DEBUG
echo "SET: " . (isset( $token_response)) . " AND " .
is_array ($token_response) . " AND " .
(array_key_exists ('address', $token_response));
if ( (isset( $token_response)) &&
(array_key_exists ('address', $token_response)) ){
$address = $token_response [ 'address' ];
echo "OIDC has address: " . json_encode ( $address ); // DEBUG
if ( in_array( 'postal_code', $address ) ){
$postal_code = $address [ 'postal_code' ];
$in['billing']['billing_postcode']['default'] = $postal_code;
$in['shipping']['shipping_postcode']['default'] = $postal_code;
}
if ( in_array( 'country', $address ) ){
$country = $address [ 'country' ];
$in['billing']['billing_country']['default'] = $country;
$in['shipping']['shipping_country']['default'] = $country;
}
if ( in_array( 'locality', $address ) ){
$locality = $address [ 'locality' ];
$in['billing']['billing_city']['default'] = $locality;
$in['shipping']['shipping_city']['default'] = $locality;
}
if ( in_array ( 'region', $address ) ){
$region = $address [ 'region' ];
$in['billing']['billing_state']['default'] = $region;
$in['shipping']['shipping_state']['default'] = $region;
}
if ( in_array ( 'formatted', $address ) ){
$formatted = $address [ 'formatted' ];
$lines = explode ( '\r\n', $formatted );
if ( count($lines) > 0 ){
$in['billing']['billing_address_1']['default'] = $lines[0];
$in['shipping']['shipping_address_1']['default'] = $lines[0];
}
if ( count($lines) > 1 ){
$in['billing']['billing_address_2']['default'] = $lines[1];
$in['shipping']['shipping_address_2']['default'] = $lines[1];
}
}
if ( in_array ( 'street_address', $address ) ){
$street_address = $address [ 'street_address' ];
if ( ! in_array ( 'formatted', $address ) ){
$in['billing']['billing_address_1']['default'] = $street_address;
$in['shipping']['shipping_address_1']['default'] = $street_address;
}
}
}
}
echo "</pre>"; // DEBUG
return $in;
}
/**
* Implements filter login_message
*
* @param $message
* @return string
*/
function handle_login_page( $message ) {
if ( isset( $_GET['login-error'] ) ) {
$message .= $this->make_error_output( $_GET['login-error'], $_GET['message'] );
}
// login button is appended to existing messages in case of error
$message .= $this->make_login_button();
return $message;
}
/**
* Display an error message to the user
*
* @param $error_code
*
* @return string
*/
function make_error_output( $error_code, $error_message ) {
ob_start();
?>
<div id="login_error">
<strong><?php _e( 'ERROR'); ?>: </strong>
<?php print esc_html($error_message); ?>
</div>
<?php
return ob_get_clean();
}
/**
* Create a login button (link)
*
* @return string
*/
function make_login_button() {
$text = apply_filters( 'openid-connect-generic-login-button-text', __( 'Login with OpenID Connect' ) );
$href = apply_filters( 'openid-connect-generic-login-button-url', $this->client_wrapper->get_authentication_url() );
ob_start();
?>
<div class="openid-connect-login-button" style="margin: 1em 0; text-align: center;">
<a class="button button-large" href="<?php print esc_url( $href ); ?>"><?php print $text; ?></a>
</div>
<?php
return ob_get_clean();
}
/*
* Removes the login form from the HTML DOM
*/
function remove_login_form() {
?>
<script type="text/javascript">
(function() {
var loginForm = document.getElementById("user_login").form;
var parent = loginForm.parentNode;
parent.removeChild(loginForm);
})();
</script>
<?php
}
}
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