for #101: check session cache for results

db/utils.js

@@ -134,6 +134,8 @@ const DBUtils = {
       return await aEntry
         .$relatedQuery("breaches")
         .orderBy("name");
+    }, async () => {
+      return [];
     });
   },
 

routes/home.js

@@ -27,8 +27,16 @@ router.get("/monitor", urlEncodedParser, handleIndexRoute);
 router.post("/scan", urlEncodedParser, async (req, res) => {
   const email = req.body.email;
   let foundBreaches;
+
   if (email) {
-    foundBreaches = await DBUtils.getBreachesForEmail(email);
+    if (req.session.scanResults && req.session.scanResults[email]) {
+      foundBreaches = req.session.scanResults[email];
+    } else {
+      req.session.scanResults = {};
+      console.log("querying database for breaches");
+      foundBreaches = await DBUtils.getBreachesForEmail(email);
+      req.session.scanResults[email] = foundBreaches;
+    }
   }
 
   res.render("scan", {