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Multi-Lingual Support

This document provides a guide for developers on how to deploy and configure multi-lingual support in an application using the WebFramework. The framework provides a robust translation system that allows you to manage translations for different languages.

Overview

The WebFramework uses a combination of translation services and loaders to manage translations. The TranslationService is the main service responsible for providing translation functionality, while the FileTranslationLoader is used to load translations from files. This is all handled by the BootstrapService, so you don't have to worry about it.

Setting Up Translations

Step 1: Define Translation Files

Translation files are PHP files that return an associative array of translation keys and their corresponding translations. These files are typically organized by language and category.

Example Translation File

Create a file named en.php in your translations directory. For all messages in the WebFramework there is already a default translation in English.You can override default translations by using the same key in your translation file.

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<?php

return [
    'authenticator' => [
        'auth_required_message' => 'Authentication required. Please login.',
    ],
    'change_email' => [
        'duplicate' => 'E-mail address is already in use in another account',
        'success' => 'E-mail address changed successfully',
    ],
    // Add more categories and translations as needed
];

Step 2: Configure Translation Directories

In your configuration file (e.g., config.php), specify the directories where translation files are located. This is done under the translations key.

For available configuration options and default settings, see config/base_config.php.

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<?php

return [
    // Other configuration settings...

    'translations' => [
        'default_language' => 'en',
        'directories' => [
            'translations', // Directory containing translation files
        ],
    ],
];

You can override the default language by setting the default_language in your configuration file.

Step 3: Use the Translation Functions

The WebFramework provides helper functions __() and __C() to retrieve translations in your application. These functions use the TranslationService to fetch translations.

Example Usage

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<?php

// Translate a specific tag within a category
$message = __('notifications', 'hello_world');

// Get all translations for a specific category
$genderOptions = __C('genders');

In this example, the __() function is used to retrieve a specific translation, while the __C() function is used to retrieve all translations for a specific category. This can be useful when you need to retrieve all options for a selection input in your template.

Handling Messages with Translations

The MessageService is used to manage messages in the application, including translating message keys into their corresponding translations.

Adding Messages

When adding a message, you can specify a translation key instead of a plain text message. The MessageService will automatically translate the key using the TranslationService.

Example

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<?php

use WebFramework\Presentation\MessageService;

class ExampleAction
{
    public function __construct(
        private MessageService $messageService,
    ) {}

    public function execute(): void
    {
        $this->messageService->add('info', 'authenticator.auth_required_message');
    }
}

In this example, the ExampleAction adds a message using a translation key. The MessageService translates the key into the corresponding message.