Resolve "Sort highscores"

Closes #57 (closed)

backend/api/highscores.js

@@ -61,6 +61,7 @@ router.post("/highscore", async (req, res) => {
   try {
     gameId = mongo.ObjectID(req.body.gameId);
     playerId = mongo.ObjectID(req.body.playerId);
+    value = !isNaN(parseInt(req.body.value)) ? parseInt(req.body.value) : null;
   } catch (err) {
     res.status(400).send("Invalid IDs");
     return;
@@ -75,8 +76,6 @@ router.post("/highscore", async (req, res) => {
     return;
   }
 
-  value = parseInt(req.body.value);
-
   updateHighscore(gameId, playerId, value).then(result => {
     if (result == 500) {
       res.sendStatus(500);