Hw02 express

app.js

@@ -1,25 +1,27 @@
-const express = require('express')
-const logger = require('morgan')
-const cors = require('cors')
+import express from "express";
+import logger from "morgan";
+import cors from "cors";
 
-const contactsRouter = require('./routes/api/contacts')
+import { router as contactsRouter } from "./routes/api/contactsRouter.js";
 
-const app = express()
+const app = express();
 
-const formatsLogger = app.get('env') === 'development' ? 'dev' : 'short'
+const formatsLogger = app.get("env") === "development" ? "dev" : "short";
 
-app.use(logger(formatsLogger))
-app.use(cors())
-app.use(express.json())
+app.use(logger(formatsLogger));
+app.use(cors());
+app.use(express.json());
 
-app.use('/api/contacts', contactsRouter)
+app.use("/api/contacts", contactsRouter);
 
 app.use((req, res) => {
-  res.status(404).json({ message: 'Not found' })
-})
+  res.status(404).json({ message: "Not found" });
+});
 
-app.use((err, req, res, next) => {
-  res.status(500).json({ message: err.message })
-})
+app.use((err, _req, res, _next) => {
+  const { status = 500, message = "Server error" } = err;
+  res.status(status).json({ message });
+});
 
-module.exports = app
+// module.exports = app;
+export { app };

helpers/HttpError.js

@@ -0,0 +1,15 @@
+const messages = {
+  400: "Bad request",
+  401: "Unauthorized",
+  403: "Forbidden",
+  404: "Not found",
+  409: "Conflict",
+};
+
+const httpError = (status, message = messages[status]) => {
+  const error = new Error(message);
+  error.status = status;
+  return error;
+};
+
+export { httpError };

models/contacts.js

@@ -1,19 +1,64 @@
-// const fs = require('fs/promises')
+import fs from "fs/promises";
+import path from "path";
+import { nanoid } from "nanoid";
 
-const listContacts = async () => {}
+const contactsPath = path.join("models", "contacts.json");
 
-const getContactById = async (contactId) => {}
+const listContacts = async () => {
+  const contacts = await fs.readFile(contactsPath);
+  return JSON.parse(contacts);
+};
 
-const removeContact = async (contactId) => {}
+const getContactById = async (contactId) => {
+  const contacts = await listContacts();
+  const result = contacts.find((contact) => contact.id === contactId);
+  return result || null;
+};
 
-const addContact = async (body) => {}
+const removeContact = async (contactId) => {
+  const contacts = await listContacts();
+  const index = contacts.findIndex((item) => item.id === contactId);
 
-const updateContact = async (contactId, body) => {}
+  if (index === -1) {
+    return null;
+  }
 
-module.exports = {
-  listContacts,
-  getContactById,
-  removeContact,
-  addContact,
-  updateContact,
-}
+  const deletedContact = contacts.splice(index, 1);
+  await fs.writeFile(contactsPath, JSON.stringify(contacts, null, 2));
+  return deletedContact;
+};
+
+const addContact = async ({ name, email, phone }) => {
+  const contacts = await listContacts();
+  const newContact = {
+    id: nanoid(),
+    name,
+    email,
+    phone,
+  };
+  const allContacts = [...contacts, newContact];
+  await fs.writeFile(contactsPath, JSON.stringify(allContacts, null, 2));
+  return newContact;
+};
+
+const updateContact = async (id, { name, email, phone }) => {
+  const contacts = await listContacts();
+  const index = contacts.findIndex((item) => item.id === id);
+
+  if (index === -1) {
+    return null;
+  }
+
+  contacts[index] = {
+    id,
+    name,
+    email,
+    phone,
+  };
+
+  await fs.writeFile(contactsPath, JSON.stringify(contacts, null, 2));
+  return contacts[index];
+};
+
+// prettier-ignore
+export { listContacts, getContactById, removeContact, addContact, updateContact };