server.js

const http = require("http");
const { v4: uuidv4 } = require("uuid");
const errorHandle = require("./errorHandle");
const todoListData = [];

const requestListener = (req, res) => {
  const headers = {
    "Access-Control-Allow-Headers": "Content-Type, Authorization, Content-Length, X-Requested-With",
    "Access-Control-Allow-Origin": "*",
    "Access-Control-Allow-Methods": "PATCH, POST, GET,OPTIONS,DELETE",
    "Content-Type": "application/json"
  }
  let bodyData = "";
  req.on("data", chunk => {
    bodyData += chunk;
  })

  if (req.url == "/todos" && req.method == "GET"){
    res.writeHead(200, headers);
    res.write(JSON.stringify({
      "status": "success",
      "message": "取得待辦列表",
      "data": todoListData
    }))
    res.end();
  } else if (req.url == "/todos" && req.method == "POST") {
    req.on("end", () => {
      try {
        const todoTitle = JSON.parse(bodyData).title;
        if (!!todoTitle) {
          const newTodoData = {
            "title": todoTitle,
            "uuid": uuidv4()
          }
          todoListData.push(newTodoData);
          res.writeHead(200, headers);
          res.write(JSON.stringify({
            "status": "success",
            "message": "新增一筆待辦",
            "data": todoListData
          }))
          res.end();
        } else {
          errorHandle(res);
        }
      } catch (error) {
        errorHandle(res);
      }
    })
  } else if (req.url == "/todos" && req.method == "DELETE") {
    todoListData.length = 0;
    res.writeHead(200, headers);
    res.write(JSON.stringify({
      "status": "success",
      "message": "刪除所有待辦",
      "data": todoListData
    }))
    res.end();
  } else if (req.url.startsWith("/todos/") && req.method == "DELETE") {
    const uuid = req.url.split("/").pop();
    const todoIndex = todoListData.findIndex(element => element.uuid == uuid);
    if (todoIndex > -1) {
      todoListData.splice(todoIndex, 1);
      res.writeHead(200, headers);
      res.write(JSON.stringify({
        "status": "success",
        "message": "刪除一筆待辦",
        "data": todoListData
      }))
      res.end();
    } else {
      errorHandle(res);
    }
  } else if (req.url.startsWith("/todos/") && req.method == "PATCH") {
    req.on("end", () => {
      try {
        const editTitle = JSON.parse(bodyData).title;
        const uuid = req.url.split("/").pop();
        const todoIndex = todoListData.findIndex(element => element.uuid == uuid);
        if (!!editTitle && todoIndex > -1) {
          todoListData[todoIndex].title = editTitle;
          res.writeHead(200, headers);
          res.write(JSON.stringify({
            "status": "success",
            "message": "編輯一筆待辦",
            "data": todoListData
          }))
          res.end();
        } else {
          errorHandle(res);
        }
        res.end();
      } catch (error) {
        errorHandle(res);
      }
    })
  } else if (req.method == "OPTIONS") {
    res.writeHead(200, headers);
    res.end();
  } else {
    res.writeHead(404, headers);
    res.write(JSON.stringify({
      "status": "false",
      "message":"路徑錯誤"
    }))
    res.end();
  }
}

const server = http.createServer(requestListener);
server.listen(process.env.PORT || 3005);