pushFile.js

const fs = require("fs").promises;
const path = require("path")
let issets = [];
module.exports.pushFile = (name, data, dirname = './') => {
    console.log('Processing request: ', name);
    name = name.replace(/(\(|\)|:| )/g,'');
    if(issets.includes(name)){
        console.log(`Duplicate found: `,name);
        return fs.appendFile(`${path.join(__dirname,dirname)}/${name}.css`,data, function(error){
            if(error) throw error; // если возникла ошибка  
            console.log(`Asynchronous recording of a take to a file ${name}.css complited.`);
        });
    }else{
        issets.push(name); // сбор пройденых запросов
        return fs.writeFile(`${path.join(__dirname,dirname)}/${name}.css`,data, function(error){
            if(error) throw error; // если возникла ошибка
            console.log(`Writing a file asynchronously ${name}.css complited.`);
        });
    }
}