dev into fetch-tournament.

To allow testing before merging into dev.

backend/api/rounds.js

+const express = require("express");
+const router = express.Router();
+const mongo = require("mongodb");
+const MongoClient = mongo.MongoClient;
+const connectionUrl = process.env.MONGO_CONNECTION_STRING;
+
+router.get("/:roundid", (req, res) => {
+  // Connect to database
+  MongoClient.connect(
+    connectionUrl,
+    { useNewUrlParser: true, useUnifiedTopology: true },
+    (err, client) => {
+      // Unable to connect to database
+      if (err) {
+        res.sendStatus(500); // Internal server error
+        return;
+      }
+
+      // Using the database gameWare and collection rounds
+      const db = client.db("gameWare");
+      const collection = "rounds";
+
+      let id = undefined;
+      try {
+        id = mongo.ObjectID(req.params.roundid); // get roundId
+      } catch (error) {
+        res.status(404).send("No document with specified id was found");
+        return;
+      }
+
+      db.collection(collection)
+        .findOne({
+          _id: id
+        })
+        .then(result => {
+          if (!result) {
+            res.status(404).send("No document with specified id found");
+            return;
+          }
+          res.json(result);
+        })
+        .catch(err => console.log(err));
+    }
+  );
+});
+
+router.get("/:tournamentId/:playerId/:roundNr", (req, res) => {
+  // Connect to database
+  MongoClient.connect(
+    connectionUrl,
+    { useNewUrlParser: true, useUnifiedTopology: true },
+    (err, client) => {
+      // Unable to connect to database
+      if (err) {
+        res.sendStatus(500); // Internal server error
+        return;
+      }
+      // Using the database gameWare and collection rounds
+      const db = client.db("gameWare");
+      const collection = "rounds";
+
+      let tournamentId,
+        playerId,
+        roundNr = undefined;
+      try {
+        tournamentId = mongo.ObjectID(req.params.tournamentId); // get tournamentId
+        playerId = mongo.ObjectID(req.params.playerId); // get playerId
+        roundNr = parseInt(req.params.roundNr); // get roundNr
+      } catch (error) {
+        res.status(404).send("No document with specified params found");
+        return;
+      }
+
+      db.collection(collection)
+        .findOne({
+          tournamentId,
+          playerId,
+          roundNr
+        })
+        .then(result => {
+          if (!result) {
+            res.status(404).send("No document with specified id params found");
+            return;
+          }
+          res.json(result);
+        })
+        .catch(err => console.log(err));
+    }
+  );
+});
+
+router.post("/", (req, res) => {
+  // Connect to database
+  MongoClient.connect(
+    connectionUrl,
+    { useNewUrlParser: true, useUnifiedTopology: true },
+    (err, client) => {
+      // Unable to connect to database
+      if (err) {
+        res.sendStatus(500); // Internal server error
+        return;
+      }
+
+      // Using the database gameWare and collection rounds
+      const db = client.db("gameWare");
+      const collection = "rounds";
+
+      const values = {
+        tournamentId: null,
+        playerId: null,
+        gameId: null,
+        roundNr: null,
+        deadlineDate: null
+      };
+
+      try {
+        values.tournamentId = mongo.ObjectID(req.body.tournamentId);
+        values.playerId = mongo.ObjectID(req.body.playerId);
+        values.gameId = mongo.ObjectID(req.body.gameId);
+        values.roundNr = !isNaN(parseInt(req.body.roundNr))
+          ? parseInt(req.body.roundNr)
+          : null;
+        values.deadlineDate = getDate(req.body.deadlineDate);
+      } catch (error) {
+        res.status(404).send("No document with specified id was found");
+        console.log(error);
+        return;
+      }
+
+      // validating body
+      Object.keys(values).forEach(val => {
+        if (!req.body[val]) {
+          values[val] = null;
+        }
+      });
+      // values contains a null field
+      if (Object.values(values).some(x => x === null)) {
+        res.status(404).send("Missing fields in request");
+        return;
+      }
+
+      values.scoreValue = 0;
+      values.hasPlayed = false;
+
+      db.collection(collection).insertOne(values, (err, result) => {
+        if (err) {
+          res.sendStatus(500); // Internal server error
+          return;
+        }
+        res.json(result.ops[0]);
+      });
+    }
+  );
+});
+
+router.put("/:roundid", (req, res) => {
+  // Connect to database
+  MongoClient.connect(
+    connectionUrl,
+    { useNewUrlParser: true, useUnifiedTopology: true },
+    (err, client) => {
+      // Unable to connect to database
+      if (err) {
+        res.sendStatus(500); // Internal server error
+        return;
+      }
+
+      // Using the database gameWare and collection rounds
+      const db = client.db("gameWare");
+      const collection = "rounds";
+
+      let id,
+        scoreValue = null;
+      try {
+        id = mongo.ObjectID(req.params.roundid); // get roundId
+        scoreValue = !isNaN(parseInt(req.body.scoreValue))
+          ? parseInt(req.body.scoreValue)
+          : null;
+      } catch (error) {
+        res.status(400).send("No document with specified id was found");
+        return;
+      }
+      if (scoreValue === null) {
+        res.status(400).send("Request body not valid");
+        return;
+      }
+
+      db.collection(collection)
+        .findOneAndUpdate(
+          { _id: id },
+          { $set: { scoreValue: scoreValue } },
+          { returnOriginal: false }
+        )
+        .then(updatedDocument => {
+          if (updatedDocument.value) {
+            //console.log("Successfully updated document");
+            res.json(updatedDocument.value); // Return updated document
+          } else {
+            //console.log("Failed to update doucment");
+            res.status(404).send("No document with specified id was found");
+          }
+        })
+        .catch(err => console.log(err));
+    }
+  );
+});
+
+// Export API routes
+module.exports = router;
+
+function getDate(dateString) {
+  date = new Date(dateString);
+  if (isNaN(date.getTime())) {
+    return null;
+  }
+  return date;
+}