Olaoluwa Oyebode_Pull Request

package.json

@@ -2,7 +2,7 @@
   "name": "express-router-with-in-memory-data-store",
   "version": "1.0.0",
   "description": "",
-  "main": "index.js",
+  "main": "src/index.js",
   "scripts": {
     "start": "npx nodemon src/index.js",
     "test": "npx jest -i test/api/routes --forceExit --runInBand",
@@ -15,7 +15,7 @@
   },
   "devDependencies": {
     "jest": "^28.1.3",
-    "nodemon": "^2.0.22",
+    "nodemon": "^3.1.4",
     "supertest": "^6.3.3"
   },
   "keywords": []

src/index.js

@@ -1,5 +1,5 @@
 /* REQUIRE APP */
-const app = require('./server.js')
+const app = require("./server.js");
 const port = 3030;
 
 /* START SERVER */

src/routers/books.js

@@ -1,4 +1,124 @@
-// Import data here...
+const express = require("express");
+const router = express.Router();
 
+const books = [
+  { id: 1, title: "1984", type: "fiction", author: "George Orwell", pages: 5 },
+  {
+    id: 2,
+    title: "Life of Pi",
+    type: "fiction",
+    author: "Yann Martel",
+    pages: 4,
+  },
+  {
+    id: 3,
+    title: "How to Win Friends and Influence People",
+    type: "non-fiction",
+    author: "Dale Carnegie",
+    pages: 3,
+  },
+  {
+    id: 4,
+    title: "The Lean Startup",
+    type: "non-fiction",
+    author: "Eric Reis",
+    pages: 2,
+  },
+];
 
-// Write routes here...
+// Endpoint to get all books
+router.get("/", (req, res) => {
+  res.json({ books });
+});
+
+// Endpoint to get a book by ID
+router.get("/:id", (req, res) => {
+  const book = books.find((b) => b.id === parseInt(req.params.id));
+  if (!book) {
+    return res
+      .status(404)
+      .send({ error: "A book the provided ID does not exist" });
+  }
+  res.json({ book });
+});
+
+// Endpoint to create a new book
+router.post("/", (req, res) => {
+  const { title, type, author, pages } = req.body;
+  if (!title || !type || !author || pages === undefined) {
+    return res.status(400).send({ error: "Missing fields in request body" });
+  }
+  const existingBook = books.find((b) => b.title === title);
+  if (existingBook) {
+    return res
+      .status(409)
+      .send({ error: "A book with the provided title already exists" });
+  }
+  const newBook = {
+    id: books.length + 1,
+    title,
+    type,
+    author,
+    pages,
+  };
+  books.push(newBook);
+  res.status(201).json({ book: newBook });
+});
+
+// Endpoint to update a book by ID
+router.put("/:id", (req, res) => {
+  const { title, type, author, pages } = req.body;
+  if (!title || !type || !author || pages === undefined) {
+    return res.status(400).send({ error: "Missing fields in request body" });
+  }
+  const book = books.find((b) => b.id === parseInt(req.params.id));
+  if (!book) {
+    return res
+      .status(404)
+      .send({ error: "A book with the provided ID does not exist" });
+  }
+  const existingBook = books.find((b) => b.title === title && b.id !== book.id);
+  if (existingBook) {
+    return res
+      .status(409)
+      .send({ error: "A book with the provided title already exists" });
+  }
+  Object.assign(book, req.body);
+  res.status(200).json({ book });
+});
+
+// Endpoint to partially update a book by ID
+router.patch("/:id", (req, res) => {
+  const book = books.find((b) => b.id === parseInt(req.params.id));
+  if (!book) {
+    return res
+      .status(404)
+      .send({ error: "A book with the provided ID does not exist" });
+  }
+  if (req.body.title) {
+    const existingBook = books.find(
+      (b) => b.title === req.body.title && b.id !== book.id
+    );
+    if (existingBook) {
+      return res
+        .status(409)
+        .send({ error: "A book with the provided title already exists" });
+    }
+  }
+  Object.assign(book, req.body);
+  res.status(200).json({ book });
+});
+
+// Endpoint to delete a book by ID
+router.delete("/:id", (req, res) => {
+  const bookIndex = books.findIndex((b) => b.id === parseInt(req.params.id));
+  if (bookIndex === -1) {
+    return res
+      .status(404)
+      .send({ error: "A book the provided ID does not exist" });
+  }
+  const deletedBook = books.splice(bookIndex, 1);
+  res.status(200).json({ book: deletedBook[0] });
+});
+
+module.exports = router;