languee/index.js

The most and powerfull way to work with multi language project

const fs = require('fs')
const path = require('path');

var locale = new Intl.DateTimeFormat().resolvedOptions().locale.replace(`-`, `_`)
var directory = `locales`
var file = `main`
var maps = []

const setLocale = ( l ) =>  locale = l
const setDirectory = ( d ) => directory = d
const setFile = ( f ) => file = f

const getDirectory = () => directory
const getFile = () => file
const getLocale = () => locale
const setMaps = ( main_locale,  locales = [] ) => maps.push({[main_locale]:[ ...locales]})

const map = ( l ) =>
{
    for ( let [okey, ovalue] of Object.entries(maps))
        for ( let [lkey, lvalue] of Object.entries(ovalue))
            if ( lvalue.indexOf(l) !== -1 )
                l = lkey

    return l
}

const load = ( my_locale ) =>
{
    let _locale = my_locale || getLocale()

    _locale = map(_locale)

    try
    {
        let dir = path.dirname(require.main.filename);
        dir = `${dir}/${getDirectory()}`

        if ( fs.existsSync(dir) )
        {
            dir = `${dir}/${_locale}`
            if ( fs.existsSync(dir) )
            {
                dir = `${dir}/${getFile()}.json`
                if ( fs.existsSync(dir) )
                {
                    return require(dir)
                }
                else
                {
                    throw(`Directory no found '${dir}' in your project!`)
                }
            }
            else
            {
                throw(`Directory '${dir}' not found in your project!`)
            }

        }
        else
        {
            throw(`Directory '${dir}' not found  on the root of your project!`)
        }
    }
    catch (e)
    {
        try
        {
            const translations = require('../../locales/index')
            return translations[`${_locale}_${getFile()}`] || {}
        }
        catch (e)
        {
            return {}
        }
    }
}

const t = ( text, arr = {}, locale = null ) =>
{
    const translator = load(locale)

    text = translator[text] || text

    for ( let key in arr )
        text = text.replace(`{${key}}`, arr[key])

    return text
}

module.exports = {
    t, setLocale, setDirectory, setFile, getDirectory, getFile, getLocale, setMaps
}