Return author on GET book endpoints

src/routes/books/get.ts

@@ -1,6 +1,7 @@
 import { FastifyInstance } from "fastify";
 import { Type, Static } from "@sinclair/typebox";
 
+import * as Authors from "../../services/authors";
 import * as Books from "../../services/books";
 import * as Errors from "../../services/errors";
 
@@ -9,24 +10,33 @@ const GetBookParams = Type.Object({
 });
 type GetBookParams = Static<typeof GetBookParams>;
 
+const GetBookResponse = Type.Composite([
+  Books.BookResponse,
+  Type.Object({
+    author: Type.Optional(Authors.AuthorResponse),
+  }),
+]);
+type GetBookResponse = Static<typeof GetBookResponse>;
+
 export const registerGetBook = (app: FastifyInstance) => {
   app.get<{
     Params: GetBookParams;
-    Reply: Books.BookResponse | Errors.NotFound;
+    Reply: GetBookResponse | Errors.NotFound;
   }>(
     `/books/:bookId`,
     {
       schema: {
         params: GetBookParams,
-        response: { 200: Books.BookResponse, 404: Errors.NotFound },
+        response: { 200: GetBookResponse, 404: Errors.NotFound },
       },
     },
     (request, reply) => {
       const book = Books.get(request.params.bookId);
       if (!book) {
         reply.code(404).send({ message: "Not Found" });
       } else {
-        reply.code(200).send(book);
+        const author = Authors.get(book.author_id) ?? undefined;
+        reply.code(200).send({ ...book, author: author });
       }
     }
   );

src/routes/books/getMany.ts

@@ -1,10 +1,19 @@
 import { FastifyInstance } from "fastify";
 import { Type, Static } from "@sinclair/typebox";
 
+import * as Authors from "../../services/authors";
 import * as Books from "../../services/books";
 import { PaginatedTypeBox } from "../../services/paginated";
 
-const GetBooksResponse = PaginatedTypeBox(Books.BookResponse);
+const BookWithAuthor = Type.Composite([
+  Books.BookResponse,
+  Type.Object({
+    author: Type.Optional(Authors.AuthorResponse),
+  }),
+]);
+type BookWithAuthor = Static<typeof BookWithAuthor>;
+
+const GetBooksResponse = PaginatedTypeBox(BookWithAuthor);
 type GetBooksResponse = Static<typeof GetBooksResponse>;
 
 const GetBooksQuery = Type.Object({
@@ -41,7 +50,10 @@ export const registerGetBooks = (app: FastifyInstance) => {
       const books = Books.getMany(sort);
       reply.code(200).send({
         has_more_data: false,
-        data: books,
+        data: books.map((b) => ({
+          ...b,
+          author: Authors.get(b.author_id) ?? undefined,
+        })),
         next: null,
       });
     }