feat: add authors resource

src/app.js

@@ -5,7 +5,7 @@ import bodyParser from 'body-parser';
 import logger from './utils/logger';
 
 // import routes here
-
+import authorsRoutes from './components/authors/authors.routes';
 
 // init express app
 const app = express();
@@ -27,10 +27,8 @@ app.get('/', async (req, res) => {
 });
 
 // Add your routes here
-/**
- * for example,
- * app.use('/api/v1/authors', authorsRoutes);
- */
+app.use('/api/v1/authors', authorsRoutes);
+
 
 // routes end here
 

src/components/authors/authors.controller.js

@@ -0,0 +1,48 @@
+import { Prisma } from '@prisma/client';
+import authorsService from './authors.service';
+
+class AuthorsController {
+  async getAuthors(req, res, next) {
+    try {
+      const authors = await authorsService.findAll();
+      return res.status(200).json(authors);
+    } catch (error) {
+      console.error(error);
+      return next(error);
+    }
+  }
+
+  async createAuthor(req, res, next) {
+    try {
+      const createdAuthor = await authorsService.create(req.body);
+      return res.status(201).json(createdAuthor);
+    } catch (error) {
+      // Prisma client errors
+      // read more about errors https://www.prisma.io/docs/reference/api-reference/error-reference
+      if (error instanceof Prisma.PrismaClientKnownRequestError) {
+        // The .code property can be accessed in a type-safe manner
+        if (error.code === 'P2002') {
+          return res.status(400).json({
+            error: true,
+            message: 'Author already exists with the same email.',
+          });
+        }
+      }
+      return next(error);
+    }
+  }
+
+  async getAuthor(req, res, next) {
+    try {
+      const authorId = parseInt(req.params.authorId, 10);
+      const author = await authorsService.findOne(authorId);
+
+      return res.status(200).json(author);
+    } catch (error) {
+      console.error(error.message);
+      return next(error);
+    }
+  }
+}
+
+export default new AuthorsController();

src/components/authors/authors.dao.js

@@ -0,0 +1,37 @@
+import { prisma } from '../../config/prismaClient';
+
+class AuthorDAO {
+  create(data) {
+    return prisma.author.create({ data });
+  }
+
+  findAll() {
+    return prisma.author.findMany();
+  }
+
+  findOne(id) {
+    return prisma.author.findUnique({
+      where: {
+        id,
+      },
+    });
+  }
+
+  update(id, updatedData) {
+    return prisma.author.update({
+      where: { id },
+      data: updatedData,
+    });
+  }
+
+  getBooksByAuthor(id) {
+    return prisma.author.findUnique({
+      where: { id },
+      select: {
+        books: true,
+      },
+    });
+  }
+}
+
+export default new AuthorDAO();

src/components/authors/authors.routes.js

@@ -0,0 +1,16 @@
+import express from 'express';
+
+import AuthorsController from './authors.controller';
+
+const router = express.Router();
+
+// get all authors
+router.get('/', AuthorsController.getAuthors);
+
+// create author
+router.post('/', AuthorsController.createAuthor);
+
+// get single author
+router.get('/:authorId', AuthorsController.getAuthor);
+
+export default router;

src/components/authors/authors.service.js

@@ -0,0 +1,17 @@
+import authorDAO from './authors.dao';
+
+class AuthorsService {
+  findAll() {
+    return authorDAO.findAll();
+  }
+
+  findOne(id) {
+    return authorDAO.findOne(id);
+  }
+
+  async create(data) {
+    return authorDAO.create(data);
+  }
+}
+
+export default new AuthorsService();

src/components/books/books.dao.js

@@ -0,0 +1,34 @@
+import { prisma } from '../../config/prismaClient';
+
+class BooksDAO {
+  create(data) {
+    return prisma.book.create({ data });
+  }
+
+  findAll() {
+    return prisma.book.findMany();
+  }
+
+  findOne(id) {
+    return prisma.book.findUnique({
+      where: {
+        id,
+      },
+    });
+  }
+
+  update(id, updatedData) {
+    return prisma.book.update({
+      where: { id },
+      data: updatedData,
+    });
+  }
+
+  getBooksByAuthor(authorId) {
+    return prisma.book.findMany({
+      where: { authorId },
+    });
+  }
+}
+
+export const authorDAO = new BooksDAO();