class-wpml-url-converter-lang-param-helper.php
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<?php
use WPML\FP\Str;
class WPML_URL_Converter_Lang_Param_Helper {
/**
* @var array
*/
private static $cache = array();
/**
* @var array
*/
private $active_languages;
/**
* @param array $active_languages
*/
public function __construct( array $active_languages ) {
$this->active_languages = $active_languages;
}
/**
*
* @param string $url
* @param bool $only_admin If set to true only language parameters on Admin Screen URLs will be recognized. The
* function will return null for non-Admin Screens.
*
* @return null|string Language code
*/
public function lang_by_param( $url, $only_admin = true ) {
if ( isset( self::$cache[ $url ] ) ) {
return self::$cache[ $url ];
}
$lang = $this->extract_lang_param_from_url( $url, $only_admin );
self::$cache[ $url ] = $lang;
return $lang;
}
/**
* @param string $url
* @param bool $only_admin
*
* @return string|null
*/
private function extract_lang_param_from_url( $url, $only_admin ) {
$url = wpml_strip_subdir_from_url( $url );
$url_query_parts = wpml_parse_url( $url );
$url_query = $this->has_query_part( $only_admin, $url_query_parts ) ? untrailingslashit( $url_query_parts['query'] ) : null;
$isLoginPageUrl = Str::includes( 'wp-login.php', $_SERVER['REQUEST_URI'] );
$isLoginPage = function( $vars ) use ( $isLoginPageUrl ) {
return $isLoginPageUrl && isset( $vars['wp_lang'] ) && is_string( $vars['wp_lang'] );
};
$getWpLang = function( $vars ) {
$wp_lang = explode( '_', $vars['wp_lang'] );
return ( count( $wp_lang ) > 0 ) ? strtolower( $wp_lang[0] ) : null;
};
if ( null !== $url_query ) {
parse_str( $url_query, $vars );
if ( $this->can_retrieve_lang_from_query( $only_admin, $vars ) ) {
return $vars['lang'];
} else if ( $isLoginPage( $vars ) ) {
// Handling case when Language URL format is 'Language name added as a parameter'.
return $getWpLang( $vars );
}
}
// Handling case when Language URL format is 'Different languages in directories'.
if ( is_array( $url_query_parts ) && isset( $url_query_parts['query'] ) && is_string( $url_query_parts['query'] ) ) {
parse_str( $url_query_parts['query'], $vars );
if ( $isLoginPage( $vars ) ) {
return $getWpLang( $vars );
}
}
return null;
}
/**
* @param bool $only_admin
* @param array $url_query_parts
*
* @return bool
*/
private function has_query_part( $only_admin, $url_query_parts ) {
if ( ! isset( $url_query_parts['query'] ) ) {
return false;
}
if ( false === $only_admin ) {
return true;
}
if ( ! isset( $url_query_parts['path'] ) ) {
return false;
}
if ( false === strpos( $url_query_parts['path'], '/wp-admin' ) ) {
return false;
}
return true;
}
/**
* @param bool $only_admin
* @param array $vars
*
* @return bool
*/
private function can_retrieve_lang_from_query( $only_admin, $vars ) {
if ( ! isset( $vars['lang'] ) ) {
return false;
}
if ( $only_admin && 'all' === $vars['lang'] ) {
return true;
}
if ( in_array( $vars['lang'], $this->active_languages, true ) ) {
return true;
}
return false;
}
}