Periklis

data/index.js

@@ -1,4 +1,4 @@
-const books = [
+  const books = [
   {
     id: 1,
     title: "1984",

package.json

@@ -1,7 +1,7 @@
 {
   "name": "express-router-with-in-memory-data-store",
   "version": "1.0.0",
-  "description": "",
+  "description": "In this exercise, you are going to extend the REST APIs you have been building to handle DELETE and PUT requests. You will also learn how to make your route handling more modular in express using express.Router.",
   "main": "index.js",
   "scripts": {
     "start": "npx nodemon src/index.js",
@@ -15,8 +15,14 @@
   },
   "devDependencies": {
     "jest": "^28.1.3",
-    "nodemon": "^2.0.22",
+    "nodemon": "^3.1.3",
     "supertest": "^6.3.3"
   },
-  "keywords": []
+  "keywords": [],
+  "directories": {
+    "doc": "docs",
+    "test": "test"
+  },
+  "author": "",
+  "license": "ISC"
 }

src/controllers/booksController.js

@@ -0,0 +1,94 @@
+const booksData = require("../../data/index.js")
+const {
+	MissingFieldsError,
+	ExistingDataError,
+	DataNotFoundError,
+} = require("../errors/errors.js")
+
+const books = booksData.books
+let newBookId = books.length + 1
+
+const getAllBooks = (req, res) => {
+	res.status(200).json({ books: books })
+}
+
+const createNewBook = (req, res) => {
+	const newBook = req.body
+
+	if (!newBook.title || !newBook.author || !newBook.type) {
+		throw new MissingFieldsError("Missing fields in request body")
+	}
+	if (books.find((b) => b.title === newBook.title)) {
+		throw new ExistingDataError(
+			"A book with the provided title already exists"
+		)
+	}
+	newBook.id = newBookId
+	newBookId += 1
+	books.push(newBook)
+	res.status(201).json({ book: newBook })
+}
+
+const getBookById = (req, res) => {
+	const bookId = Number(req.params.id)
+	const foundBook = books.find((b) => b.id === bookId)
+	if (!foundBook) {
+		throw new DataNotFoundError(
+			"A book the provided ID does not exist"
+		)
+	}
+	res.status(200).json({ book: foundBook })
+}
+
+const deleteBookById = (req, res) => {
+	const bookId = Number(req.params.id)
+	const bookToDelete = books.find((b) => b.id === bookId)
+	if (!bookToDelete) {
+		throw new DataNotFoundError(
+			"A book the provided ID does not exist"
+		)
+	}
+	const indexToDelete = books.indexOf(bookToDelete)
+	books.splice(indexToDelete, 1)
+	res.status(200).json({ book: bookToDelete })
+}
+
+const updateBookById = (req, res) => {
+	const bookId = Number(req.params.id)
+	const updateBook = req.body
+	const foundBook = books.find((b) => b.id === bookId)
+
+	if (
+		!updateBook.title ||
+		!updateBook.type ||
+		!updateBook.author 
+	) {
+		throw new MissingFieldsError('Missing fields in request body')
+	}
+
+	if (!foundBook) {
+		throw new DataNotFoundError(
+			"A book the provided ID does not exist"
+		)
+	}
+
+
+	const existingTitle = books.find((b) => b.title === updateBook.title)
+	if (existingTitle) {
+		throw new ExistingDataError(
+			"A book with the provided title already exists"
+		)
+	}
+
+	updateBook.id = bookId
+	books.splice(bookId - 1, 1, updateBook)
+	res.status(200).json({ book: updateBook })
+}
+
+module.exports = {
+	getAllBooks,
+	createNewBook,
+	getBookById,
+	deleteBookById,
+	updateBookById,
+}