Homework02

app.js

@@ -1,25 +1,38 @@
-const express = require('express')
-const logger = require('morgan')
-const cors = require('cors')
+const express = require("express");
+const logger = require("morgan");
+const cors = require("cors");
 
-const contactsRouter = require('./routes/api/contacts')
+const contactsRouter = require("./routes/api/contacts");
 
-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.get("/", (req, res) => {
+  res.send("API is up and running!");
+});
+
+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 })
-})
-
-module.exports = app
+  console.error(err.stack);
+  res.status(err.status || 500).json({
+    message: err.message || "Server error",
+    stack: process.env.NODE_ENV === "development" ? err.stack : undefined,
+  });
+});
+
+const PORT = process.env.PORT || 4000;
+app.listen(PORT, () => {
+  console.log(`Server is running on port ${PORT}`);
+});
+
+module.exports = app;

models/contacts.js

@@ -1,19 +1,53 @@
-// const fs = require('fs/promises')
+const fs = require("fs/promises");
+const path = require("path");
+const { v4: uuidv4 } = require("uuid");
 
-const listContacts = async () => {}
+const contactsPath = path.join(__dirname, "contacts.json");
 
-const getContactById = async (contactId) => {}
+const listContacts = async () => {
+  const data = await fs.readFile(contactsPath, "utf8");
+  return JSON.parse(data);
+};
 
-const removeContact = async (contactId) => {}
+const getContactById = async (contactId) => {
+  const contacts = await listContacts();
+  return contacts.find((contact) => contact.id === contactId) || null;
+};
 
-const addContact = async (body) => {}
+const removeContact = async (contactId) => {
+  const contacts = await listContacts();
+  const index = contacts.findIndex((contact) => contact.id === contactId);
+  if (index === -1) {
+    return null;
+  }
+  const [removedContact] = contacts.splice(index, 1);
+  await fs.writeFile(contactsPath, JSON.stringify(contacts, null, 2));
+  return removedContact;
+};
 
-const updateContact = async (contactId, body) => {}
+const addContact = async ({ name, email, phone }) => {
+  const contacts = await listContacts();
+  const newContact = { id: uuidv4(), name, email, phone };
+  contacts.push(newContact);
+  await fs.writeFile(contactsPath, JSON.stringify(contacts, null, 2));
+  return newContact;
+};
+
+const updateContact = async (contactId, body) => {
+  const contacts = await listContacts();
+  const index = contacts.findIndex((contact) => contact.id === contactId);
+  if (index === -1) {
+    return null;
+  }
+  contacts[index] = { ...contacts[index], ...body };
+  await fs.writeFile(contactsPath, JSON.stringify(contacts, null, 2));
+  return contacts[index];
+};
 
 module.exports = {
   listContacts,
   getContactById,
   removeContact,
   addContact,
   updateContact,
-}
+};

package.json

@@ -1,5 +1,5 @@
 {
-  "name": "template",
+  "name": "silvia",
   "version": "0.0.0",
   "private": true,
   "scripts": {
@@ -12,7 +12,9 @@
     "cors": "2.8.5",
     "cross-env": "7.0.3",
     "express": "4.17.1",
-    "morgan": "1.10.0"
+    "joi": "^17.13.3",
+    "morgan": "1.10.0",
+    "uuid": "^11.0.3"
   },
   "devDependencies": {
     "eslint": "7.19.0",