Merge branch '95-backend-cleanup' into 'dev'

Resolve "Backend cleanup"

Closes #95

See merge request tobiasio/progark-gruppe-3!96

backend/api/functions.js

@@ -68,7 +68,6 @@ module.exports = {
         {
           $pull: { players: { $in: players } },
           $inc: { currentPlayers: -players.length },
-          $set: { active: !end },
         },
         (err, result) => {
           if (err) {

backend/api/tournament.js

@@ -175,7 +175,7 @@ router.post("/new", (req, res) => {
               return;
             }
             // returns the tournament
-            res.json(result);
+            res.json(result.ops[0]);
             client.close();
           }
         );
@@ -195,6 +195,11 @@ router.post("/join", (req, res) => {
         res.sendStatus(500); // Internal server error
         return;
       }
+
+      if (!req.body.playerId) {
+        res.sendStatus(400);
+        return;
+      }
       let playerId;
       try {
         playerId = mongo.ObjectID(req.body.playerId);