Added Encoding to RaceVisionByteEncoder

- Added chatterText

src/main/java/seng302/Networking/RaceVisionByteEncoder.java

@@ -3,7 +3,9 @@ package seng302.Networking;
 import seng302.Model.BoatInRace;
 
 import java.nio.ByteBuffer;
+import java.nio.charset.Charset;
 import java.util.ArrayList;
+import java.util.Arrays;
 
 /**
  * Created by fwy13 on 19/04/17.
@@ -139,39 +141,53 @@ public class RaceVisionByteEncoder {
         result.put(event);
         return result.array();
     }
-/*
+
     public byte[] chatterText(int messageType, String message){
         int messageVersion = 0b1;
         byte[] type = convert(messageType, 1);
         byte[] length = convert(message.length(), 1);
-        byte[] messageBytes = message.getBytes(Charset.forName("UTF-8"));
+        byte[] text = convert(message, length[0]);
 
-        //byte[] text =
-        return;
-    }*/
+        ByteBuffer result = ByteBuffer.allocate(3 + text.length);
+        result.put(convert(messageVersion, 1));
+        result.put(type);
+        result.put(length);
+        result.put(text);
+
+        return result.array();
+    }
 /*
+    public byte[] boatLocation(){
+
+    }*/
+
     public byte[] convert(String s, int size){
         byte[] m = s.getBytes(Charset.forName("UTF-8"));
         int length = m.length;
+        byte[] result;
         if (length > 255){
             length = 255;
+        } else if (size < 1){
+            result = new byte[0];
+            return result;
         }
-        byte[] result = Arrays.copyOfRange(m, 0, length + 1);
+        result = Arrays.copyOfRange(m, 0, length + 1);
+        return result;
     }
-*/
+
     public byte[] convert(int n, int size){
         byte[] result;
         if (size > 4){
             result = new byte[4];
             return result;
+        } else if (size < 1){
+            result = new byte[0];
+            return result;
         }
         ByteBuffer byteBuffer = ByteBuffer.allocate(4);
         byteBuffer.putInt(n);
         byte[] bytes = byteBuffer.array();
-        result = new byte[size];
-        for (int i = 4 - size ; i < 4; i++){
-            result[i-size] = bytes[i];
-        }
+        result = Arrays.copyOfRange(bytes, 4 - size, 4);
         return result;
     }
 
@@ -180,14 +196,14 @@ public class RaceVisionByteEncoder {
         if (size > 8){
             result = new byte[8];
             return result;
+        } else if (size < 1){
+            result = new byte[0];
+            return result;
         }
         ByteBuffer byteBuffer = ByteBuffer.allocate(8);
         byteBuffer.putLong(n);
         byte[] bytes = byteBuffer.array();
-        result = new byte[size];
-        for (int i = 8 - size ; i < 8; i++){
-            result[i-size] = bytes[i];
-        }
+        result = Arrays.copyOfRange(bytes, 8 - size, 8);
         return result;
     }
 
@@ -197,14 +213,14 @@ public class RaceVisionByteEncoder {
         if (size > 2){
             result = new byte[2];
             return result;
+        } else if (size < 1){
+            result = new byte[0];
+            return result;
         }
         ByteBuffer byteBuffer = ByteBuffer.allocate(2);
         byteBuffer.putLong(n);
         byte[] bytes = byteBuffer.array();
-        result = new byte[size];
-        for (int i = 2 - size ; i < 2; i++){
-            result[i-size] = bytes[i];
-        }
+        result = Arrays.copyOfRange(bytes, 2 - size, 2);
         return result;
     }