solution

src/controllers/expense.controller.js

@@ -0,0 +1,175 @@
+const expenseService = require('../services/expense.service');
+const userService = require('../services/user.service');
+
+const get = async (req, res) => {
+  const query = req.query;
+
+  let { userId } = query;
+  const { categories } = query;
+  const filter = {};
+
+  if (userId) {
+    userId = Number(userId);
+
+    if (!Number.isInteger(userId)) {
+      res.sendStatus(400);
+
+      return;
+    }
+
+    filter.userId = userId;
+  }
+
+  if (categories) {
+    filter.category = categories;
+  }
+
+  try {
+    const expenses = await expenseService.get(filter);
+
+    res.send(expenses);
+  } catch {
+    res.sendStatus(500);
+  }
+};
+
+const getExpense = async (req, res) => {
+  let { id } = req.params;
+
+  id = Number(id);
+
+  try {
+    const expense = await expenseService.getExpenseById(id);
+
+    if (!expense) {
+      res.sendStatus(404);
+
+      return;
+    }
+
+    res.send(expense);
+  } catch {
+    res.sendStatus(500);
+  }
+};
+
+const createExpense = async (req, res) => {
+  const { userId, spentAt, title, amount, category, note } = req.body;
+
+  const expenseBody = {
+    userId,
+    spentAt,
+    title,
+    amount,
+    category: category || null,
+    note: note || null,
+  };
+
+  if (!Object.values(expenseBody).every((v) => v !== undefined)) {
+    res.sendStatus(400);
+
+    return;
+  }
+
+  const isUser = await userService.getUserById(Number(userId));
+
+  if (!isUser) {
+    res.sendStatus(400);
+
+    return;
+  }
+
+  try {
+    const expense = await expenseService.createExpense(expenseBody);
+
+    res.statusCode = 201;
+    res.send(expense);
+  } catch {
+    res.sendStatus(400);
+  }
+};
+
+const removeExpense = async (req, res) => {
+  let { id } = req.params;
+
+  id = Number(id);
+
+  if (!Number.isInteger(id)) {
+    res.sendStatus(400);
+
+    return;
+  }
+
+  try {
+    const isExpense = await expenseService.getExpenseById(id);
+
+    if (!isExpense) {
+      res.sendStatus(404);
+
+      return;
+    }
+
+    await expenseService.removeExpense(id);
+
+    res.sendStatus(204);
+  } catch {
+    res.sendStatus(400);
+  }
+};
+
+const updateExpense = async (req, res) => {
+  let { id } = req.params;
+  const { spentAt, title, amount, category, note } = req.body;
+
+  id = Number(id);
+
+  if (!Number.isInteger(id)) {
+    res.sendStatus(400);
+
+    return;
+  }
+
+  const isExpense = await expenseService.getExpenseById(id);
+
+  if (!isExpense) {
+    res.sendStatus(404);
+
+    return;
+  }
+
+  const newExpenseBody = {
+    spentAt,
+    title,
+    amount,
+    category,
+    note,
+  };
+
+  for (const key in newExpenseBody) {
+    if (!newExpenseBody[key]) {
+      delete newExpenseBody[key];
+    }
+  }
+
+  if (!Object.values(newExpenseBody).length) {
+    res.sendStatus(422);
+
+    return;
+  }
+
+  try {
+    const expense = await expenseService.updateExpense(id, newExpenseBody);
+
+    res.send(expense[1][0]);
+  } catch {
+    res.sendStatus(400);
+  }
+};
+
+module.exports = {
+  get,
+  getExpense,
+  createExpense,
+  removeExpense,
+  updateExpense,
+};

src/controllers/user.controller.js

@@ -0,0 +1,115 @@
+const userService = require('../services/user.service');
+
+const get = async (req, res) => {
+  try {
+    const data = await userService.getUsers();
+
+    res.send(data);
+  } catch {
+    res.sendStatus(500);
+  }
+};
+
+const getUser = async (req, res) => {
+  let { id } = req.params;
+
+  id = Number(id);
+
+  try {
+    const user = await userService.getUserById(id);
+
+    if (user === null) {
+      res.sendStatus(404);
+
+      return;
+    }
+
+    res.send(user);
+  } catch {
+    res.sendStatus(500);
+  }
+};
+
+const createUser = async (req, res) => {
+  const { name } = req.body;
+
+  if (!name) {
+    res.sendStatus(400);
+
+    return;
+  }
+
+  try {
+    const user = await userService.createUser(name);
+
+    res.statusCode = 201;
+    res.send(user);
+  } catch {
+    res.sendStatus(400);
+  }
+};
+
+const removeUser = async (req, res) => {
+  let { id } = req.params;
+
+  id = Number(id);
+
+  if (!Number.isInteger(id)) {
+    res.sendStatus(400);
+
+    return;
+  }
+
+  try {
+    const deletedUser = await userService.getUserById(id);
+
+    if (!deletedUser) {
+      res.sendStatus(404);
+
+      return;
+    }
+
+    await userService.deleteUser(id);
+
+    res.sendStatus(204);
+  } catch {
+    res.sendStatus(400);
+  }
+};
+
+const updateUser = async (req, res) => {
+  let { id } = req.params;
+  const { name } = req.body;
+
+  id = Number(id);
+
+  if (typeof name !== 'string') {
+    res.sendStatus(400);
+
+    return;
+  }
+
+  try {
+    const isUser = await userService.getUserById(id);
+
+    if (!isUser) {
+      res.sendStatus(404);
+
+      return;
+    }
+
+    const updatedUser = await userService.updateUser(id, name);
+
+    res.send(updatedUser[1][0]);
+  } catch {
+    res.sendStatus(400);
+  }
+};
+
+module.exports = {
+  get,
+  getUser,
+  createUser,
+  removeUser,
+  updateUser,
+};

src/createServer.js

@@ -1,8 +1,17 @@
 'use strict';
 
-const createServer = () => {
-  // your code goes here
-};
+const express = require('express');
+const { router: userRouter } = require('./routes/user.route');
+const { router: expenseRouter } = require('./routes/expense.route');
+
+function createServer() {
+  const app = express();
+
+  app.use('/users', express.json(), userRouter);
+  app.use('/expenses', express.json(), expenseRouter);
+
+  return app;
+}
 
 module.exports = {
   createServer,

src/db.js

@@ -26,7 +26,7 @@ const sequelize = new Sequelize({
   host: POSTGRES_HOST || 'localhost',
   dialect: 'postgres',
   port: POSTGRES_PORT || 5432,
-  password: POSTGRES_PASSWORD || '123',
+  password: POSTGRES_PASSWORD || '123456',
 });
 
 module.exports = {

src/models/Expense.model.js

@@ -1,9 +1,46 @@
 'use strict';
 
 const { sequelize } = require('../db.js');
+const { DataTypes } = require('sequelize');
 
 const Expense = sequelize.define(
-  // your code goes here
+  'Expense',
+  {
+    id: {
+      type: DataTypes.INTEGER,
+      primaryKey: true,
+      autoIncrement: true,
+    },
+    userId: {
+      type: DataTypes.INTEGER,
+      allowNull: false,
+    },
+    spentAt: {
+      type: DataTypes.DATE,
+      allowNull: false,
+      defaultValue: DataTypes.NOW,
+    },
+    title: {
+      type: DataTypes.STRING,
+      allowNull: false,
+    },
+    amount: {
+      type: DataTypes.INTEGER,
+      defaultValue: 0,
+      allowNull: false,
+    },
+    category: {
+      type: DataTypes.STRING,
+    },
+    note: {
+      type: DataTypes.STRING,
+    },
+  },
+  {
+    tableName: 'expenses',
+    createdAt: false,
+    updatedAt: false,
+  },
 );
 
 module.exports = {

src/models/User.model.js

@@ -1,9 +1,26 @@
 'use strict';
 
 const { sequelize } = require('../db.js');
+const { DataTypes } = require('sequelize');
 
 const User = sequelize.define(
-  // your code goes here
+  'User',
+  {
+    id: {
+      type: DataTypes.INTEGER,
+      primaryKey: true,
+      autoIncrement: true,
+    },
+    name: {
+      type: DataTypes.STRING,
+      allowNull: false,
+    },
+  },
+  {
+    tableName: 'users',
+    createdAt: false,
+    updatedAt: false,
+  },
 );
 
 module.exports = {