<?php
//fixes preview function for the case of using separate domains for the language negotion

global $sitepress, $sitepress_settings;
if(isset($_GET['preview']) && $sitepress_settings['language_negotiation_type'] == 2 && $sitepress->get_current_language() != $sitepress->get_default_language()){
    $post_id = $_GET['p'];
    $lang = $sitepress->get_current_language();
    $default_home = get_option('home');    
    $_GET['lang'] = $lang;
    $redir = $default_home . '?' . http_build_query($_GET);
    wp_redirect($redir);
    exit;
}

if(isset($_GET['preview']) && $sitepress_settings['language_negotiation_type'] == 2){
    add_filter('icl_current_language', 'icl_current_language_preview_hack_filter');
    function icl_current_language_preview_hack_filter($lang){
        if(isset($_GET['lang'])){
            $lang = esc_html($_GET['lang']);
        }
        return $lang;
    }   
}

?>