index.js

const express = require("express");
const cors = require("cors");
const app = express();
const morgan = require("morgan");
require("dotenv").config();
const Person = require("./models/person");

morgan.token("post-body", function (req) {
  return req.method === "POST" ? JSON.stringify(req.body) : "";
});

app.use(express.json());
app.use(express.static("dist"));
app.use(cors());
app.use(
  morgan(
    ":method :url :status :res[content-length] - :response-time ms :post-body"
  )
);

app.get("/info", (request, response, next) => {
  Person.find({})
    .then((persons) => {
      const phonebookInfo = `Phonebook has info for ${persons.length} people`;
      const time = new Date().toString();

      response.send(`<p>${phonebookInfo}</p><p>${time}</p>`);
    })
    .catch((error) => next(error));
});

app.get("/api/persons", (request, response, next) => {
  Person.find({})
    .then((persons) => {
      response.json(persons);
    })
    .catch((error) => next(error));
});

app.post("/api/persons", (request, response, next) => {
  const body = request.body;

  if (!body.name) {
    return response.status(400).json({
      error: "name is required",
    });
  }

  if (!body.number) {
    return response.status(400).json({
      error: "number is required",
    });
  }

  const person = new Person({
    name: body.name,
    number: body.number,
  });

  person
    .save()
    .then(() => {
      response.json(person);
    })
    .catch((error) => next(error));
});

app.get("/api/persons/:id", (request, response, next) => {
  Person.findById(request.params.id)
    .then((person) => {
      if (person) {
        response.json(person);
      } else {
        response.status(404).end();
      }
    })
    .catch((error) => next(error));
});

app.put("/api/persons/:id", (request, response, next) => {
  const person = {
    name: request.body.name,
    number: request.body.number,
  };

  Person.findByIdAndUpdate(request.params.id, person, {
    new: true,
    runValidators: true,
  })
    .then((updatedPerson) => {
      if (updatedPerson) {
        response.json(updatedPerson);
      } else {
        return response.status(404).end();
      }
    })
    .catch((error) => next(error));
});

app.delete("/api/persons/:id", (request, response, next) => {
  Person.findByIdAndDelete(request.params.id)
    .then(() => {
      response.status(204).end();
    })
    .catch((error) => next(error));
});

const errorHandler = (error, request, response, next) => {
  console.error(error.message);

  if (error.name === "CastError") {
    return response.status(400).send({ error: "Invalid id format" });
  } else if (error.name === "ValidationError") {
    return response.status(400).send({ error: error.message });
  }

  next(error);
};

app.use(errorHandler);

const PORT = process.env.PORT;
app.listen(PORT, () => {
  console.log(`Server running on ${PORT}`);
});