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<?php
// Do not allow directly accessing this file.
if ( ! defined( 'ABSPATH' ) ) {
exit( 'Direct script access denied.' );
}
/**
* A helper class that depending on the active multilingual plugin
* will get the available languages as well as the active language.
* Currently handles compatibility with WPML & PolyLang.
*
* @since 4.0.0
*/
class Avada_Multilingual {
/**
* Are we using WPML?
*
* @static
* @access private
* @var bool
*/
private static $is_wpml = false;
/**
* Are we using PolyLang?
*
* @static
* @access private
* @var bool
*/
private static $is_pll = false;
/**
* An array of all available languages.
*
* @static
* @access private
* @var array
*/
private static $available_languages = array();
/**
* The active language.
*
* @static
* @access private
* @var string
*/
private static $active_language = 'en';
/**
* The "main" language.
*
* @static
* @access private
* @var string
*/
private static $main_language = 'en';
/**
* The main class constructor.
* Sets the static properties of this object.
*
* @access public
*/
public function __construct() {
// Set the $is_pll property.
self::$is_pll = self::is_pll();
// Set the $is_wpml property.
self::$is_wpml = self::is_wpml();
// Set the $available_languages property.
self::set_available_languages();
// Set the $main_language properly.
self::set_main_language();
// Set the $active_language property.
self::set_active_language();
}
/**
* Sets the available languages depending on the active plugin.
*/
private static function set_available_languages() {
if ( self::$is_pll ) {
self::$available_languages = self::get_available_languages_pll();
} elseif ( self::$is_wpml ) {
self::$available_languages = self::get_available_languages_wpml();
}
}
/**
* Gets the $active_language protected property.
*/
public static function get_active_language() {
self::set_active_language();
return self::$active_language;
}
/**
* Sets the active language.
*
* @param string|bool $lang The language code to set.
*/
public static function set_active_language( $lang = false ) {
if ( is_string( $lang ) && ! empty( $lang ) ) {
self::$active_language = $lang;
}
// If we have not defined a language, then autodetect.
if ( false == $lang || empty( $lang ) ) {
// No need to proceed if both WPML & PLL are inactive.
if ( ! self::$is_pll && ! self::$is_wpml ) {
return 'en';
}
// Preliminary work for PLL.
// Adds the WPML compatibility layer.
if ( self::$is_pll && function_exists( 'pll_define_wpml_constants' ) ) {
pll_define_wpml_constants();
}
// PLL-WPML compatibility is active, we can now work easier.
if ( defined( 'ICL_LANGUAGE_CODE' ) ) {
self::$active_language = ICL_LANGUAGE_CODE;
if ( 'all' == ICL_LANGUAGE_CODE ) {
Avada::set_language_is_all( true );
if ( self::$is_wpml ) {
global $sitepress;
self::$active_language = $sitepress->get_default_language();
} elseif ( self::$is_pll ) {
self::$active_language = pll_default_language( 'slug' );
}
}
}
}
}
/**
* Gets the $available_languages protected property.
*/
public static function get_available_languages() {
if ( empty( self::$available_languages ) ) {
self::set_available_languages();
}
return self::$available_languages;
}
/**
* Get the available languages from WPML.
*
* @return array
*/
private static function get_available_languages_wpml() {
// Do not continue processing if we're not using WPML.
if ( ! self::$is_wpml ) {
return array();
}
$wpml_languages = icl_get_languages( 'skip_missing=0' );
$languages = array();
foreach ( $wpml_languages as $language_key => $args ) {
$languages[] = $args['code'];
}
return $languages;
}
/**
* Gets the default language.
*
* @return string
*/
public static function get_default_language() {
self::set_main_language();
return self::$main_language;
}
/**
* Sets the $main_language based on the active plugin.
*
* @return void
*/
private static function set_main_language() {
if ( self::$is_pll ) {
self::$main_language = self::get_main_language_pll();
} elseif ( self::$is_wpml ) {
self::$main_language = self::get_main_language_wpml();
}
}
/**
* Get the default language for WPML.
*
* @return string
*/
private static function get_main_language_wpml() {
global $sitepress;
return $sitepress->get_default_language();
}
/**
* Get the default language for PolyLang.
*
* @return string
*/
private static function get_main_language_pll() {
return pll_default_language( 'slug' );
}
/**
* Get the available languages from PolyLang.
*
* @return array
*/
private static function get_available_languages_pll() {
// Do not continue processing if we're not using PLL.
if ( ! self::$is_pll ) {
return array();
}
global $polylang;
// Get the PLL languages object.
$pll_languages_obj = $polylang->model->get_languages_list();
// Parse the object and get a usable array.
$pll_languages = array();
foreach ( $pll_languages_obj as $pll_language_obj ) {
$pll_languages[] = $pll_language_obj->slug;
}
return $pll_languages;
}
/**
* Determine if we're using PolyLang.
*
* @return bool
*/
private static function is_pll() {
return ( function_exists( 'pll_default_language' ) ) ? true : false;
}
/**
* Determine if we're using WPML.
* Since PLL has a compatibility layer for WPML, we'll have to consider that too.
*/
private static function is_wpml() {
return ( defined( 'ICL_SITEPRESS_VERSION' ) && false === self::$is_pll ) ? true : false;
}
}