server.js

//  test
var express = require("express");
var df = require("./date_format.js");
var app = express();
var request = require("request");

app.use(express.static(__dirname + "/static"));
app.set("views", __dirname + "/views");
app.engine("html", require("ejs").renderFile);
var bodyParser = require("body-parser");

// it is necesscory. Otherwise you can not get the request body.
app.use(
  bodyParser.urlencoded({
    extended: true
  })
);
app.use(bodyParser.json());

app.set("view engine", "ejs");

/*
just for test
*/
app.get("/hello", function(req, res) {
  // return ;
  res.send("Hello Express");
});

/*
leading to list page.
*/
app.get("/", function(req, res) {
  res.render("index.html");
});

/*
get product
*/
app.get("/product", function(req, res) {
  // read from DDB
  read_product_ddb();
});

app.put("/product/", function(req, res) {
  console.log(req.body);
  //write information of req.body into DDB
  write_into_ddb();
});
/*
leading to the insert form page.
*/
app.get("/new", function(req, res) {
  console.log("new get");
  res.render("newItem.html");
});

/*
leading to the insert form page.
*/
let base_get_url = "https://kgng8eutc9.execute-api.us-west-2.amazonaws.com/orders/";
app.get("/detail/:id", function(req, res) {
  console.log(req.params.id);
  request.get(base_get_url + req.params.id, function(error, response, body) {
    if (error) {
      res.send(err);
    } else {
      console.log(body);
      let data = JSON.parse(body);
      let dateTime = new Date(parseInt(data.date));
      data.date_format = dateTime.format(df.masks.isoDateTime2);
      res.render("detail", data);
    }
  });
});

/*
add a new item.
*/
let insert_url = "https://kgng8eutc9.execute-api.us-west-2.amazonaws.com/orders";
app.post("/new", function(req, res) {
  request.put({ url: insert_url, json: req.body }, function(err, response, data) {
    if (err) {
      res.send(err);
    } else {
      console.log(data);
      // res.render("index.html");
      res.redirect("/");
    }
  });
});

app.listen(8083);
console.log("Server is running on port 8083");