galactic-bot/structure/language/LocaleLoader.js

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

const { Util } = require('../../util/');

class LocaleLoader {

    constructor(client) {

        this.client = client;
        this.languages = {};

    }

    template(locale, index) {

        // console.log(String.raw`${this.languages[locale][index]}`);
        return (this.languages[locale] ? this.languages[locale][index] : `Locale \`${locale}\` does not exist.`) || `Language entry \`${locale}:${index}\` does not exist.`;

    }

    async loadLanguages() {

        const _directory = path.join(process.cwd(), 'structure/language/languages');
        const directories = fs.readdirSync(_directory); //locale directories, ex. en_us, fi
        
        for (const directory of directories) this.loadLanguage(directory);

    }

    loadLanguage(language) {

        const directory = path.join(process.cwd(), `structure/language/languages/${language}`);
        const files = Util.readdirRecursive(directory);

        const combined = {};
        for(let file of files) {
            file = fs.readFileSync(file, {
                encoding: 'utf8'
            });
            const result = this.loadFile(file);
            Object.assign(combined, result);
        }

        this.languages[language] = combined;
        this.client.logger.info(`${chalk.bold('[LOCAL]')} Language ${chalk.bold(language)} was ${chalk.bold("loaded")}.`);

    }

    loadFile(file) {

        if(process.platform === 'win32') {
            file = file.split('\n').join('');
            file = file.replace(/\r/gu, '\n');
        }

        const lines = file.split('\n');
        const parsed = {};

        let matched = null;
        let text = [];
        for(const line of lines) {
            if(line.startsWith('//') || line.startsWith('#')) continue;
            const matches = line.match(/\[([_A-Z0-9]{1,})\]/u);
            if(matches) {
                if (matched) {
                    parsed[matched] = text.join('\n').trim();
                    [, matched] = matches;
                    text = [];
                } else {
                    [, matched] = matches;
                }
            } else if (matched) {
                text.push(line);
            } else {
                continue;
            }
        }

        parsed[matched] = text.join('\n').trim();
        return parsed;

    }

} 

module.exports = LocaleLoader;