Get All Books API (#13)

Closes #2

This PR implements the getAllBooks function that can be used to get summary information about all the books, in order to display them on the main page.

I'm not sure why I waited so long to create this PR, but I suspect that we were blocked by #11 (which has now been merged).

Co-authored-by: Amy <a258wang@uwaterloo.ca>
Reviewed-on: #13
Reviewed-by: j285he <j285he@localhost>

lib/books.ts

@@ -0,0 +1,30 @@
+import sqlite3 from "sqlite3";
+
+const DATABASE_PATH = "catalogue.db";
+
+export async function getAllBooks() {
+  const database = new sqlite3.Database(DATABASE_PATH, sqlite3.OPEN_READONLY);
+
+  const books = new Promise<SimpleBook[]>((resolve, reject) => {
+    database.all(
+      "SELECT id, title, authors, isbn FROM books WHERE deleted = 0",
+      (error: Error | null, rows: SimpleBook[]) => {
+        if (error) {
+          reject(error);
+        }
+        resolve(rows);
+      }
+    );
+  });
+
+  database.close();
+
+  return books;
+}
+
+export interface SimpleBook {
+  id: number;
+  title: string | null;
+  authors: string | null;
+  isbn: string | null;
+}

pages/index.tsx

@@ -1,8 +1,29 @@
-import type { NextPage } from "next";
 import React from "react";
 
-const Home: NextPage = () => {
-  return <main>I am a book</main>;
-};
+import { getAllBooks, SimpleBook } from "../lib/books";
 
-export default Home;
+export default function Home(props: Props) {
+  return (
+    <ul>
+      {props.books.map((book, idx) => {
+        return (
+          <li key={`${idx}_${book.id}`}>
+            {book.id}; {book.title}; {book.authors}; {book.isbn}
+          </li>
+        );
+      })}
+    </ul>
+  );
+}
+
+interface Props {
+  books: SimpleBook[];
+}
+
+export async function getServerSideProps() {
+  return {
+    props: {
+      books: await getAllBooks(),
+    },
+  };
+}