add solution

src/controllers/categories.controller.js

@@ -0,0 +1,81 @@
+const categoriesService = require('../services/categories.service');
+
+const getAll = async (req, res) => {
+  const categories = await categoriesService.getAll();
+
+  res.send(categories);
+};
+
+const getOne = async (req, res) => {
+  const id = Number(req.params.id);
+
+  if (!Number.isInteger(id) || id < 1) {
+    return res.sendStatus(400);
+  }
+
+  const category = await categoriesService.getById(id);
+
+  if (!category) {
+    return res.sendStatus(404);
+  }
+
+  res.send(category);
+};
+
+const create = async (req, res) => {
+  const name = req.body.name;
+
+  if (!name || typeof name !== 'string') {
+    return res.sendStatus(400);
+  }
+
+  const category = await categoriesService.create(name);
+
+  res.status(201).json(category);
+};
+
+const deleteOne = async (req, res) => {
+  const id = Number(req.params.id);
+
+  if (!Number.isInteger(id) || id < 1) {
+    return res.sendStatus(400);
+  }
+
+  const category = await categoriesService.deleteById(id);
+
+  if (!category) {
+    return res.sendStatus(404);
+  }
+
+  res.sendStatus(204);
+};
+
+async function update(req, res) {
+  const id = Number(req.params.id);
+
+  if (!Number.isInteger(id) || id < 1) {
+    return res.sendStatus(400);
+  }
+
+  const { name } = req.body;
+
+  if (!name || typeof name !== 'string') {
+    return res.sendStatus(400);
+  }
+
+  const category = await categoriesService.update(id, name);
+
+  if (!category) {
+    return res.sendStatus(404);
+  }
+
+  res.send(category);
+}
+
+module.exports = {
+  getAll,
+  getOne,
+  create,
+  update,
+  deleteOne,
+};

src/controllers/expenses.controller.js

@@ -0,0 +1,197 @@
+const expensesService = require('../services/expenses.service');
+const usersService = require('../services/users.service');
+
+const getAll = async (req, res) => {
+  const expenses = await expensesService.getAll(req.query);
+
+  res
+    .status(200)
+    .send(expenses.map((expense) => expensesService.normalize(expense)));
+};
+
+const getOne = async (req, res) => {
+  const id = Number(req.params.id);
+
+  if (!Number.isInteger(id) || id < 1) {
+    return res.sendStatus(400);
+  }
+
+  const expense = await expensesService.getById(id);
+
+  if (!expense) {
+    return res.sendStatus(404);
+  }
+
+  res.status(200).send(expensesService.normalize(expense));
+};
+
+const create = async (req, res) => {
+  const required = ['userId', 'spentAt', 'title', 'amount'];
+
+  const hasMissingField = required.some(
+    (field) => req.body[field] === undefined,
+  );
+
+  if (hasMissingField) {
+    return res.sendStatus(400);
+  }
+
+  const { userId, spentAt, title, amount, category, note } = req.body;
+  const parsedUserId = Number(userId);
+
+  if (!Number.isInteger(parsedUserId) || parsedUserId < 1) {
+    return res.sendStatus(400);
+  }
+
+  const user = await usersService.getById(parsedUserId);
+
+  if (!user) {
+    return res.sendStatus(400);
+  }
+
+  if (
+    typeof spentAt !== 'string' ||
+    Number.isNaN(new Date(spentAt).getTime())
+  ) {
+    return res.sendStatus(400);
+  }
+
+  if (typeof title !== 'string' || title.trim() === '') {
+    return res.sendStatus(400);
+  }
+
+  const parsedAmount = Number(amount);
+
+  if (!Number.isInteger(parsedAmount) || parsedAmount < 1) {
+    return res.sendStatus(400);
+  }
+
+  if (
+    category != null &&
+    (typeof category !== 'string' || category.trim() === '')
+  ) {
+    return res.sendStatus(400);
+  }
+
+  if (note != null && typeof note !== 'string') {
+    return res.sendStatus(400);
+  }
+
+  const newExpense = await expensesService.create({
+    userId: parsedUserId,
+    spentAt: spentAt,
+    title: title.trim(),
+    amount: parsedAmount,
+    category: category?.trim() || null,
+    note: typeof note === 'string' ? note : null,
+  });
+
+  return res.status(201).send(newExpense);
+};
+
+const deleteOne = async (req, res) => {
+  const id = Number(req.params.id);
+
+  if (!Number.isInteger(id) || id < 1) {
+    return res.sendStatus(400);
+  }
+
+  const expense = await expensesService.deleteById(id);
+
+  if (!expense) {
+    return res.sendStatus(404);
+  }
+
+  res.sendStatus(204);
+};
+
+const update = async (req, res) => {
+  const id = Number(req.params.id);
+
+  if (!Number.isInteger(id) || id < 1) {
+    return res.sendStatus(400);
+  }
+
+  const expense = await expensesService.getById(id);
+
+  if (!expense) {
+    return res.sendStatus(404);
+  }
+
+  const { userId, spentAt, title, amount, category, note } = req.body;
+
+  const updateData = {};
+
+  if (userId !== undefined) {
+    const parsedUserId = Number(userId);
+
+    if (!Number.isInteger(parsedUserId) || parsedUserId < 1) {
+      return res.sendStatus(400);
+    }
+
+    updateData.userId = parsedUserId;
+  }
+
+  if (spentAt !== undefined) {
+    if (typeof spentAt !== 'string') {
+      return res.sendStatus(400);
+    }
+
+    const parsedDate = new Date(spentAt);
+
+    if (Number.isNaN(parsedDate.getTime())) {
+      return res.sendStatus(400);
+    }
+
+    updateData.spentAt = parsedDate;
+  }
+
+  if (title !== undefined) {
+    if (typeof title !== 'string' || title.trim() === '') {
+      return res.sendStatus(400);
+    }
+
+    updateData.title = title.trim();
+  }
+
+  if (amount !== undefined) {
+    const parsedAmount = Number(amount);
+
+    if (!Number.isInteger(parsedAmount) || parsedAmount < 1) {
+      return res.sendStatus(400);
+    }
+
+    updateData.amount = parsedAmount;
+  }
+
+  if (category !== undefined) {
+    if (
+      category !== null &&
+      (typeof category !== 'string' || category.trim() === '')
+    ) {
+      return res.sendStatus(400);
+    }
+
+    updateData.category = category?.trim() || null;
+  }
+
+  if (note !== undefined) {
+    if (note !== null && typeof note !== 'string') {
+      return res.sendStatus(400);
+    }
+
+    updateData.note = note ?? null;
+  }
+
+  const updatedExpense = await expensesService.update(id, updateData);
+
+  return res.status(200).send(expensesService.normalize(updatedExpense));
+};
+
+module.exports = {
+  getAll,
+  getOne,
+  create,
+  update,
+  deleteOne,
+};

src/controllers/users.controller.js

@@ -0,0 +1,81 @@
+const usersService = require('../services/users.service');
+
+const getAll = async (req, res) => {
+  const users = await usersService.getAll();
+
+  res.send(users);
+};
+
+const getOne = async (req, res) => {
+  const id = Number(req.params.id);
+
+  if (!Number.isInteger(id) || id < 1) {
+    return res.sendStatus(400);
+  }
+
+  const user = await usersService.getById(id);
+
+  if (!user) {
+    return res.sendStatus(404);
+  }
+
+  res.send(user);
+};
+
+const create = async (req, res) => {
+  const name = req.body.name;
+
+  if (!name || typeof name !== 'string') {
+    return res.sendStatus(400);
+  }
+
+  const user = await usersService.create(name);
+
+  res.status(201).json(user);
+};
+
+const deleteOne = async (req, res) => {
+  const id = Number(req.params.id);
+
+  if (!Number.isInteger(id) || id < 1) {
+    return res.sendStatus(400);
+  }
+
+  const user = await usersService.deleteById(id);
+
+  if (!user) {
+    return res.sendStatus(404);
+  }
+
+  res.sendStatus(204);
+};
+
+async function update(req, res) {
+  const id = Number(req.params.id);
+
+  if (!Number.isInteger(id) || id < 1) {
+    return res.sendStatus(400);
+  }
+
+  const { name } = req.body;
+
+  if (!name || typeof name !== 'string') {
+    return res.sendStatus(400);
+  }
+
+  const user = await usersService.update(id, name);
+
+  if (!user) {
+    return res.sendStatus(404);
+  }
+
+  res.send(user);
+}
+
+module.exports = {
+  getAll,
+  getOne,
+  create,
+  update,
+  deleteOne,
+};

src/createServer.js

@@ -1,8 +1,21 @@
 'use strict';
 
-const createServer = () => {
-  // your code goes here
-};
+const express = require('express');
+const { usersRouter } = require('./routes/users.route');
+const { expensesRouter } = require('./routes/expenses.route');
+const { categoriesRouter } = require('./routes/categories.route');
+
+function createServer() {
+  const app = express();
+
+  app.use(express.json());
+
+  app.use('/users', usersRouter);
+  app.use('/expenses', expensesRouter);
+  app.use('/categories', categoriesRouter);
+
+  return app;
+}
 
 module.exports = {
   createServer,