Timestamp Microservice Preoblem

JavaScript
1

Hello, I am try to solve the Timestamp Microservice project. I ended the project with all the functionalities, and I pass the first 4 tasks, but not the last 2. I be grateful for any help.

Your code so far

let express = require('express');
let cors = require('cors');

let app = express();
app.use(cors());

app.set('port', process.env.PORT || 3000);

function ResponseDate(date){
    return { "unix": date.getTime(), "utc": date.toUTCString() };
}

function ResponseTime(time) {
    let date = new Date(time);
    return ResponseDate(date);
}

function ResponseUnix(unix) {
    let date = new Date(parseInt(unix));
    return ResponseDate(date);
}

function ResponseCurrentTime(){
    let date = new Date();
    return ResponseDate(date);
}

app.get('/api/timestamp/:date?', function (req, res) {
    if (req.params.date !== undefined) {
        if ((new Date(parseInt(req.params.date * 1))).toString() !== "Invalid Date") {
            res.json(ResponseUnix(parseInt(req.params.date)));
        }
        else if ((new Date(req.params.date)).toString() !== "Invalid Date") {
            res.json(ResponseTime(req.params.date));
        }
        else {
            res.json({ "error": "Invalid Date" });
        }
    }
    else {
        res.json(ResponseCurrentTime());
    }
});

app.use(function (req, res, next) {
    res.status(404);
    res.send('NOT FOUND');
});

app.use(function (err, req, res, next) {
    res.status(500);
    res.send('ERROR');
});


app.listen(app.get('port'), function () {
});

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.108 Safari/537.36.

Challenge: Timestamp Microservice

Link to the challenge: