Resolve "Join tournament"

Closes #28 (closed)

backend/api/tournament.js

@@ -85,19 +85,68 @@ router.post("/join", (req, res) => {
       const db = client.db("gameWare");
       const collection = "tournaments";
 
-      db.collection(collection)
-        .find({
-          $expr: { $lt: ["$maxPlayers", "$players.length"] }
-        })
-        .toArray((err, result) => {
+      db.collection(collection).findOneAndUpdate(
+        {
+          // the length of the array of players must be less than the maximum amount
+          $expr: { $lt: ["$maxPlayers", "$players.length"] },
+          currentRound: 1,
+          active: true,
+          // the array of players cannot already contain the player
+          players: { $nin: [mongo.ObjectID(req.body.userid)] }
+        },
+        // Add the player to the array
+        { $push: { players: mongo.ObjectID(req.body.userid) } },
+        {
+          // make sure we join the oldest tournament that matches our query.
+          sort: { dateCreated: 1 },
+          // the returned document should be the modified version
+          returnNewDocument: true
+        },
+        (err, result) => {
           if (err) {
-            res.sendStatus(500);
-            console.log(err);
+            res.sendStatus(500); // Internal server error
             return;
           }
-          res.json(result);
-        });
-      db.collection("rounds").insertOne({});
+          try {
+            tournamentdate = result.value.dateCreated;
+            tournamentdate.setTime(
+              tournamentdate.getTime() +
+                result.value.timePerRound * 60 * 60 * 1000
+            );
+            // create the first round for the newly joined player
+            createFirstRound(
+              result.value._id,
+              result.value,
+              tournamentdate,
+              req.body.userid,
+              result.value.games[0]
+            );
+          } catch (err) {
+            res.json(404); // Element not found
+          }
+        }
+      );
+      //Function for creating first round of tournament for hosting player
+      function createFirstRound(tournyid, tournyresult, date, userid, gameid) {
+        db.collection("rounds").insertOne(
+          {
+            tournamentId: mongo.ObjectID(tournyid),
+            playerId: mongo.ObjectID(userid),
+            gameId: mongo.ObjectID(gameid),
+            scoreValue: 0,
+            roundNr: 1,
+            hasPlayed: false,
+            deadlineDate: date
+          },
+          err => {
+            if (err) {
+              res.sendStatus(500); // Internal server error
+              return;
+            }
+            res.json(tournyresult);
+          }
+        );
+      }
     }
   );
 });