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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 1.0 */ class Negan_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::$active_language = ICL_LANGUAGE_CODE; if ( 'all' == ICL_LANGUAGE_CODE ) { Negan::set_language_is_all( true ); if ( self::$is_wpml ) { global $sitepress; self::$active_language = $sitepress->get_default_language(); } elseif ( self::$is_pll ) { self::$active_language = pll_default_language( 'slug' ); } } } else { if ( function_exists( 'PLL' ) ) { $pll_obj = PLL(); if ( is_object( $pll_obj ) && property_exists( $pll_obj, 'curlang' ) ) { if ( is_object( $pll_obj->curlang ) && property_exists( $pll_obj->curlang, 'slug' ) ) { self::$active_language = $pll_obj->curlang->slug; } elseif ( false === $pll_obj->curlang ) { self::$active_language = 'all'; Negan::set_language_is_all( true ); } } } } } } /** * 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 = wpml_get_active_languages_filter( NULL, '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; } }
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