Hw02 express

models/contacts.js

@@ -1,19 +1,95 @@
-// const fs = require('fs/promises')
+const fs = require("fs").promises;
+const { nanoid } = require("nanoid");
+const path = require("path");
 
-const listContacts = async () => {}
+const contactsPath = path.join(__dirname, "../models/contacts.json");
 
-const getContactById = async (contactId) => {}
+const Joi = require("joi");
 
-const removeContact = async (contactId) => {}
+const schema = Joi.object({
+  name: Joi.string().min(3).max(30).required(),
+  email: Joi.string().email().required(),
+  phone: Joi.string()
+    .pattern(/^[0-9\-()+ ]+$/)
+    .required(),
+});
 
-const addContact = async (body) => {}
+const updateSchema = Joi.object({
+  name: Joi.string().min(3).max(30),
+  email: Joi.string().email(),
+  phone: Joi.string().pattern(/^[0-9\-()+ ]+$/),
+});
 
-const updateContact = async (contactId, body) => {}
+const listContacts = async () => {
+  const data = await fs.readFile(contactsPath, "utf8");
+  const contacts = JSON.parse(data);
+  return contacts;
+};
+
+const getContactById = async (contactId) => {
+  const contacts = await listContacts();
+  const contact = contacts.find((contact) => contact.id === contactId);
+
+  return contact || null;
+};
+
+const removeContact = async (contactId) => {
+  const contacts = await listContacts();
+  const filteredContacts = contacts.filter(
+    (contact) => contact.id !== contactId
+  );
+
+  if (contacts.length === filteredContacts.length) {
+    return null;
+  }
+
+  await fs.writeFile(contactsPath, JSON.stringify(filteredContacts, null, 2));
+
+  return true;
+};
+
+const addContact = async (name, email, phone) => {
+  const contacts = await listContacts();
+
+  const isDuplicate = contacts.some(
+    (contact) => contact.email === email || contact.phone === phone
+  );
+
+  if (isDuplicate) {
+    return null;
+  }
+
+  const newContact = {
+    id: nanoid(),
+    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,
-}
+  schema,
+  updateSchema,
+};

models/contacts.json

@@ -58,5 +58,11 @@
     "name": "Alec Howard",
     "email": "Donec.elementum@scelerisquescelerisquedui.net",
     "phone": "(748) 206-2688"
+  },
+  {
+    "id": "dZ7QVAS8InYXlOwOeLN9X",
+    "name": "Magda",
+    "email": "magdat@gmail.com",
+    "phone": "123456789"
   }
-]
+]