AdminLanguageSwitcher.php
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<?php
namespace WPML\AdminLanguageSwitcher;
use WPML\Element\API\Languages;
use WPML\FP\Maybe;
use WPML\FP\Obj;
use WPML\FP\Relation;
use WPML\FP\Str;
use WPML\LIB\WP\Option;
use WPML\UrlHandling\WPLoginUrlConverter;
class AdminLanguageSwitcher implements \IWPML_Frontend_Action {
const LANGUAGE_SWITCHER_KEY = 'wpml_show_login_page_language_switcher';
public function add_hooks() {
add_action( 'login_footer', [ $this, 'triggerDropdown' ] );
add_action( 'plugins_loaded', [ $this, 'maybeSaveNewLanguage' ] );
}
public function maybeSaveNewLanguage() {
if ( ! $this->isLanguageSwitcherShown() ) {
return;
}
$selectedLocale = $this->getSelectedLocale();
if ( $selectedLocale ) {
$languageCode = Languages::localeToCode( $selectedLocale );
if ( ! is_string( $languageCode ) ) {
return;
}
$secure = ( 'https' === parse_url( wp_login_url(), PHP_URL_SCHEME ) );
setcookie( 'wp-wpml_login_lang', $languageCode, time() + 120, COOKIEPATH, COOKIE_DOMAIN, $secure );
setcookie( 'wp_lang', '', time() - 3600, COOKIEPATH, COOKIE_DOMAIN, $secure );
global $sitepress;
wp_safe_redirect( $this->prepareRedirectLink( $sitepress, $languageCode ) );
}
}
public function triggerDropdown() {
if ( ! $this->isLanguageSwitcherShown() ) {
return;
}
wp_register_style(
'wpml-login-language-switcher',
ICL_PLUGIN_URL . '/res/css/login-language-switcher.css'
);
wp_enqueue_style( 'wpml-login-language-switcher' );
$selectedLocale = determine_locale();
$languages = wpml_collect( Languages::getActive() );
$prepareOptions = function ( $languages ) use ( $selectedLocale ) {
return $languages->sortBy( function ( $language ) use ( $selectedLocale ) {
return $language['default_locale'] !== $selectedLocale;
} )
->map( Obj::addProp( 'selected', Relation::propEq( 'default_locale', $selectedLocale ) ) )
->map( function ( $language ) {
return sprintf( '<option value="%s" lang="%s" %s>%s</option>',
esc_attr( Obj::prop( 'default_locale', $language ) ),
esc_attr( Obj::prop( 'code', $language ) ),
esc_attr( Obj::prop( 'selected', $language ) ? 'selected' : '' ),
esc_html( Obj::prop( 'native_name', $language ) )
);
} );
};
AdminLanguageSwitcherRenderer::render( $prepareOptions( $languages )->all() );
}
private function isOnWpLoginPage( $url ) {
return Str::includes( 'wp-login.php', $url )
|| Str::includes( 'wp-signup.php', $url )
|| Str::includes( 'wp-activate.php', $url );
}
/**
* @return string|false
*/
private function getSelectedLocale() {
return Maybe::of( $_GET )
->map( Obj::prop('wpml_lang' ) )
->map( 'sanitize_text_field' )
->getOrElse( false );
}
/**
* @return bool
*/
private function isLanguageSwitcherShown() {
return $this->isOnWpLoginPage( site_url( $_SERVER['REQUEST_URI'], 'login' ) ) && WPLoginUrlConverter::isEnabled() && self::isEnabled();
}
/**
* @param $sitepress
* @param string $languageCode
*
* @return string
*/
private function prepareRedirectLink( $sitepress, $languageCode ) {
$redirectTo = $sitepress->convert_url( site_url( 'wp-login.php' ), $languageCode );
$redirectToParam = Maybe::of( $_GET )
->map( Obj::prop( 'redirect_to' ) )
->map( 'esc_url_raw' )
->getOrElse( false );
$action = Maybe::of( $_GET )
->map( Obj::prop( 'action' ) )
->map( 'esc_attr' )
->getOrElse( false );
if ( $redirectToParam ) {
$redirectTo = add_query_arg( 'redirect_to', $redirectToParam, $redirectTo );
}
if ( $action ) {
$redirectTo = add_query_arg( 'action', $action, $redirectTo );
}
return $redirectTo;
}
/**
* @param bool $state
*/
public static function saveState( $state ) {
Option::updateWithoutAutoLoad( self::LANGUAGE_SWITCHER_KEY, $state );
}
/**
* @return bool
*/
public static function isEnabled() {
return Option::getOr( self::LANGUAGE_SWITCHER_KEY, true );
}
public static function enable() {
self::saveState( true );
}
public static function disable() {
self::saveState( false );
}
}