From 79c759075fbd20f6892a434118387b95359b2af8 Mon Sep 17 00:00:00 2001
From: Amy <a258wang@uwaterloo.ca>
Date: Mon, 15 Nov 2021 23:46:25 -0500
Subject: [PATCH] Add basic error checking

---
 pages/api/books.ts | 26 +++++++++++++++++++-------
 1 file changed, 19 insertions(+), 7 deletions(-)

diff --git a/pages/api/books.ts b/pages/api/books.ts
index 0fb1562..1a127f9 100644
--- a/pages/api/books.ts
+++ b/pages/api/books.ts
@@ -3,18 +3,30 @@ import sqlite3 from "sqlite3";
 
 const DATABASE_PATH = "catalogue.db";
 
-export default async function getAllBooks(
+export default function getAllBooks(
   request: NextApiRequest,
   response: NextApiResponse
 ) {
+  if (request.method !== "GET") {
+    response.status(405);
+    return;
+  }
+
   const database = new sqlite3.Database(DATABASE_PATH, sqlite3.OPEN_READONLY);
 
-  database.all(
-    "SELECT title, authors, isbn FROM books",
-    (error, rows: SimpleBook[]) => {
-      response.status(200).json(rows);
-    }
-  );
+  try {
+    database.all(
+      "SELECT title, authors, isbn FROM books",
+      (error: Error | null, rows: SimpleBook[]) => {
+        if (error) {
+          throw error;
+        }
+        response.status(200).json(rows);
+      }
+    );
+  } catch (error) {
+    response.status(500);
+  }
 
   database.close();
 }