t

models/contacts.js

@@ -1,14 +1,120 @@
-// const fs = require('fs/promises')
+const { v4: uuidv4 } = require("uuid");
+const fs = require('fs').promises;
+const path = require('path');
+const contactsPath = path.join(__dirname, 'contacts.json');
 
-const listContacts = async () => {}
+const listContacts = async () => {
+  try {
+    const data = await fs.readFile(contactsPath);
+    const contacts = JSON.parse(data);
+    return contacts;
+  } catch (err) {
+    console.error("Error reading contacts file in listContacts:", err);
+    throw err;
+  }
+};
 
-const getContactById = async (contactId) => {}
+const getContactById = async (contactId) => {
+  let contacts;
+
+  try {
+    const data = await fs.readFile(contactsPath);
+    contacts = JSON.parse(data);
+  } catch (err) {
+    console.error("Error reading contacts file in getContactById:", err);
+    throw err;
+  }
 
-const removeContact = async (contactId) => {}
+  const contact = contacts.filter((contact) => contact.id === contactId);
+  if (contact.length === 0) {
+    return null;
+  }
+  return contact;
+};
 
-const addContact = async (body) => {}
+const removeContact = async (contactId) => {
+  let contacts;
 
-const updateContact = async (contactId, body) => {}
+  try {
+    contacts = await listContacts();
+  } catch (err) {
+    console.error("Error reading contacts file in removeContact:", err);
+    throw err;
+  }
+
+  const index = contacts.findIndex((contact) => contact.id === contactId);
+  if (index === -1) {
+    return null;
+  }
+
+  contacts.splice(index, 1);
+
+  try {
+    await fs.writeFile(contactsPath, JSON.stringify(contacts, null, 2));
+  } catch (err) {
+    console.error("Error writing to contacts file in removeContact:", err);
+    throw err;
+  }
+
+  return contacts;
+};
+
+const addContact = async (body) => {
+  let contacts;
+
+  try {
+    contacts = await listContacts();
+  } catch (err) {
+    console.error("Error reading contacts file in addContact:", err);
+    throw err;
+  }
+
+  const newContact = {
+    id: uuidv4(),
+    ...body,
+  };
+
+  contacts.push(newContact);
+
+  try {
+    await fs.writeFile(contactsPath, JSON.stringify(contacts, null, 2));
+    return newContact;
+  } catch (err) {
+    console.error("Error writing to contacts file in addContact:", err);
+    throw err;
+  }
+};
+
+const updateContact = async (contactId, body) => {
+  let contacts;
+
+  try {
+    contacts = await listContacts();
+  } catch (err) {
+    console.error("Error reading contacts file in updateContact:", err);
+    throw err;
+  }
+
+  const index = contacts.findIndex((contact) => contact.id === contactId);
+  if (index === -1) {
+    return null;
+  }
+
+  const newContact = {
+    id: uuidv4(),
+    ...body,
+  };
+
+  contacts.splice(index, 1, newContact);
+
+  try {
+    await fs.writeFile(contactsPath, JSON.stringify(contacts, null, 2));
+    return newContact;
+  } catch (err) {
+    console.error("Error writing to contacts file in updateContact:", err);
+    throw err;
+  }
+};
 
 module.exports = {
   listContacts,

package.json

@@ -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": "^11.1.0"
   },
   "devDependencies": {
     "eslint": "7.19.0",