Mashroom I18N

Plugin for Mashroom Server, a Microfrontend Integration Platform.

This plugin adds a service for internationalization. It determines the language from the HTTP headers and supports translation of messages.

Usage

If node_modules/@mashroom is configured as plugin path just add @mashroom/mashroom-i18n as dependency.

After that you can use the service like this:

import type {MashroomI18NService} from '@mashroom/mashroom-i18n/type-definitions';

export default (req: Request, res: Response) => {
    const i18nService: MashroomI18NService = req.pluginContext.services.i18n.service;

    const currentLang = i18nService.getLanguage(req);
    const message =  i18nService.getMessage('username', 'de');
    // message will be 'Benutzernamen'

    // ...
}

You can override the default config in your Mashroom config file like this:

{
    "plugins": {
        "Mashroom Internationalization Services": {
            "availableLanguages": ["en", "de", "fr"],
            "defaultLanguage": "en",
            "messages": "./messages"
        }
    }
}

• availableLanguages: A list of available languages (Default: ["en"])
• defaultLanguage: The default language if it can not be determined from the request (Default: en)
• messages: The folder with custom i18n messages (Default: ./messages). There are default messages in the messages folder of this package.

The lookup for message files works like this:

• <messages_folder>/messages.<lang>.json
• <built_in_messages_folder>/messages.<lang>.json
• <messages_folder>/messages.json
• <built_in_messages_folder>/messages.json

And a messages file (e.g. messages.de.json) looks like this:

{
    "message_key": "Die Nachricht"
}

Services

MashroomI18NService

The exposed service is accessible through pluginContext.services.i18n.service

Interface:

export interface MashroomI18NService {
    /**
     * Get the currently set language (for current session)
     */
    getLanguage(req: Request): string;

    /**
     * Set session language
     */
    setLanguage(language: string, req: Request): void;

    /**
     * Get the message for given key and language
     */
    getMessage(key: string, language: string): string;

    /**
     * Get plain string in the current users language from a I18NString
     */
    translate(req: Request, str: I18NString): string;

    /**
     * Get available languages
     */
    readonly availableLanguages: Readonly<Array<string>>;

    /**
     * Get the default languages
     */
    readonly defaultLanguage: string;
}