feat: refactor book query to filter by title

Author: amalv

src/graphql/resolvers/Book.ts

@@ -3,11 +3,13 @@ import { Book } from "../../entity/Book";
 
 export const BookResolvers = {
   Query: {
-    books: async () => {
+    books: async (_: any, args: { title?: string }) => {
       try {
         const dataSourceInstance = await dataSource;
         const bookRepository = dataSourceInstance.getRepository(Book);
-        const books = await bookRepository.find();
+        const books = await bookRepository.find({
+          where: args.title ? { title: args.title } : {},
+        });
         return books;
       } catch (error) {
         console.error("Error fetching books:", error);

src/graphql/types/index.ts

@@ -7,7 +7,7 @@ export const typeDefs = `#graphql
   type Query {
     hello: String!
     dbInfo: String!
-    books: [Book!]!
     users: [User!]!
+    books(title: String): [Book!]!
   }
 `;