index.js

require('dotenv').config();

const { response } = require('express');
//const { response } = require('express');
const express = require('express');
//const { Pool } = require('pg');
const app = express();
//const cors = require('cors');
const port = process.env.PORT_SRV || 3001;

const merchant_model = require('./merchant_model');

app.use(express.json());
//app.use(cors());

app.use(function (req, res, next) {
  res.setHeader('Access-Control-Allow-Origin', 'http://localhost:3000');
  res.setHeader('Access-Control-Allow-Methods', 'GET,POST,PUT,DELETE,OPTIONS');
  res.setHeader('Access-Control-Allow-Headers', 'Content-Type, Access-Control-Allow-Headers');
  next();
});

app.get('/', (req, res) => {
    merchant_model.getMerchants()
    .then(response => {
        res.status(200).send(response);
        //console.log(res)
    })
    .catch(error => {
        res.status(500).send(error);
    })
});

app.post('/merchants', (req, res) => {
    merchant_model.createMerchant(req.body)
    .then(response => {
        res.status(200).send(response)
    })
    .catch(error => {
        res.status(500).send(error)
    })
});

app.put('/merchants/:id', (req, res) => {
    const id = req.params.id
    const body = req.body
    merchant_model.updateMerchant(id, body)
    .then(response => {
        res.status(200).send(response)
    })
    .catch(error => {
        res.status(500).send(error)
    })
});

app.delete('/merchants/:id', (req, res) => {
    merchant_model.deleteMerchant(req.params.id)
    .then(response => {
      res.status(200).send(response);
    })
    .catch(error => {
      res.status(500).send(error);
    })
})

app.listen(port, () => {
    console.log(`App running on port ${port}.`);
});