var fs = require('fs');
var JsBarcode = require('jsbarcode');
var { createCanvas } = require("canvas");
var canvas = createCanvas();
var JSZip = require("jszip");
var zip = new JSZip();

function NovoGeradorBarCode(numBarCodeGerado) {
    for (i = 0; i < numBarCodeGerado; i++) {
        let random = Math.random();
        console.log(random);
        let date = new Date;
        random = random.toString().match(/[^.][0-9]{6}/)[0];
        let month = (date.getMonth() + 1).toString().padStart(2, "0");
        let day = date.getDate().toString().padStart(2, "0");
        let milli = date.getMilliseconds().toString().slice(1,3);
        let barCode = random.concat(month, day, milli);
        console.log('barcode',barCode);
        JsBarcode(canvas, barCode);
        zip.file(`barcode_${i}.png`, canvas.toBuffer());
    }
    
    zip.generateNodeStream({type:'nodebuffer',streamFiles:true})
    .pipe(fs.createWriteStream('C:\\Users\\Maker\\Desktop\\out.zip'))
    .on('finish', function () {
        console.log("out.zip written.");
    });
}