app.js

import express from "express";
import mongoose from "mongoose";
import Task from "./task.js";
import { DATABASE_URL } from "./constants.js";
import cors from "cors";

const app = express();

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

await mongoose.connect(DATABASE_URL);

app.get("/tasks", async (req, res) => {
  /** 쿼리 목록
   *  - count: 아이템 개수
   *  - sort: 정렬
   */
  const count = Number(req.query.count) || 0;

  if (count === 0) {
    return res.json([]);
  }

  const sortOption =
    req.query.sort === "oldest" ? ["createdAt", "asc"] : ["createdAt", "desc"];
  const tasks = await Task.find().limit(count).sort([sortOption]);
  res.send(tasks);
});

app.get("/tasks/:id", async (req, res) => {
  const task = await Task.findById(req.params.id);
  if (task) {
    res.send(task);
  } else {
    res.status(404).send({ message: "해당 id를 찾을 수 없습니다." });
  }
});

app.post("/tasks", async (req, res) => {
  const newTask = await Task.create(req.body);
  res.status(201).send(newTask);
});

app.patch("/tasks/:id", async (req, res) => {
  const task = await Task.findById(req.params.id);
  if (task) {
    const { body } = req;
    Object.keys(body).forEach((key) => {
      task[key] = body[key];
    });
    await task.save();
    res.send(task);
  } else {
    res.status(404).send({ message: "해당 id를 찾을 수 없습니다." });
  }
});

app.delete("/tasks/:id", async (req, res) => {
  const task = await Task.findByIdAndDelete(req.params.id);
  if (task) {
    res.sendStatus(200);
  } else {
    res.status(404).send({ message: "해당 id를 찾을 수 없습니다." });
  }
});

app.listen(process.env.PORT || 3000, () => console.log("Server Started"));