Game state now updates based on boat position. Arrows drawn as boat travels course. Currently do not point in correct direction, also the sparkline does not work.

#bug #refactor #implement #story[1118]

src/main/java/seng302/gameServer/messages/Heartbeat.java

@@ -0,0 +1,27 @@
+package seng302.gameServer.messages;
+
+public class Heartbeat extends Message {
+    private final int MESSAGE_SIZE = 4;
+
+    /**
+     * Heartbeat from the AC35 Streaming data spec
+     * @param seqNo Increment every time a message is sent
+     */
+    public Heartbeat(int seqNo){
+        setHeader(new Header(MessageType.HEARTBEAT, 0x01, (short) getSize()));
+
+        allocateBuffer();
+        writeHeaderToBuffer();
+
+        putUnsignedInt(seqNo, 4);
+
+        writeCRC();
+        rewind();
+    }
+
+    @Override
+    public int getSize() {
+        return MESSAGE_SIZE;
+    }
+
+}