language-manager.php

<?php
require_once 'config/config.php';
require_once 'classes/UserProfile.php';

Config::load();

// Verificar que sea una petición AJAX
if (!isset($_SERVER['HTTP_X_REQUESTED_WITH']) || $_SERVER['HTTP_X_REQUESTED_WITH'] !== 'XMLHttpRequest') {
    header('HTTP/1.1 400 Bad Request');
    exit('Solo peticiones AJAX');
}

header('Content-Type: application/json');

$response = ['success' => false, 'message' => ''];

try {
    if ($_SERVER['REQUEST_METHOD'] === 'POST') {
        $input = json_decode(file_get_contents('php://input'), true);
        
        if (!$input || !isset($input['language'])) {
            throw new Exception('Idioma no especificado');
        }
        
        $language = $input['language'];
        
        // Validar idioma
        if (!in_array($language, ['es', 'en', 'de'])) {
            throw new Exception('Idioma no válido');
        }
        
        // Cambiar idioma en la clase I18n
        $i18n = I18n::getInstance();
        if ($i18n->setLanguage($language)) {
            $response['success'] = true;
            $response['message'] = 'Idioma cambiado correctamente';
            $response['data'] = [
                'language' => $language,
                'language_name' => $i18n->getCurrentLanguageName()
            ];
        } else {
            throw new Exception('Error al cambiar el idioma');
        }
        
    } else {
        throw new Exception('Método no permitido');
    }
    
} catch (Exception $e) {
    $response['message'] = $e->getMessage();
}

echo json_encode($response);