Implemented NTtBProtocolParser.java.

Still needs to be tested.

src/main/java/ch/unibas/dmi/dbis/cs108/Multiplayer/Client/Client.java

@@ -28,7 +28,8 @@ public class Client {
             Scanner sc = new Scanner(System.in);
             while (socket.isConnected()) {
                 String msg = sc.nextLine();
-                out.write(userName + "says: " + msg);
+                String encodedMsg = encodeMessage(msg);
+                out.write(encodedMsg);
                 out.newLine();
                 out.flush();
             }
@@ -38,6 +39,18 @@ public class Client {
         }
     }
 
+    /**
+     * Uses <code>NTtBProtocolParser</code> to turn Client
+     * input into the NTtB Protocol format.
+     * Must be called before a client input is sent to the server.
+     * @param msg the msg to be encoded.
+     * @return Message encoded adhering to the NTtB Protocoll.
+     */
+    private String encodeMessage(String msg) {
+        NTtBProtocolParser pp = new NTtBProtocolParser(this);
+        return pp.parseMsg(msg);
+    }
+
     public void chatListener() {
         new Thread(new Runnable() {
             @Override
@@ -89,4 +102,8 @@ public class Client {
         }
 
     }
+
+    public String getUsername() {
+        return userName;
+    }
 }

src/main/java/ch/unibas/dmi/dbis/cs108/Multiplayer/Client/EmptyClientInputException.java

@@ -0,0 +1,15 @@
+package ch.unibas.dmi.dbis.cs108.Multiplayer.Client;
+
+public class EmptyClientInputException extends Exception {
+    String exceptionMsg;
+    Client whoDunIt;
+    public EmptyClientInputException(Client whoDunIt) {
+        this.whoDunIt = whoDunIt;
+        this.exceptionMsg = whoDunIt.getUsername() + " tried to send an empty message";
+    }
+
+    public String getExceptionMsg(){
+        return exceptionMsg;
+    }
+
+}

src/main/java/ch/unibas/dmi/dbis/cs108/Multiplayer/Client/InputToProtocolMap.java

@@ -0,0 +1,16 @@
+package ch.unibas.dmi.dbis.cs108.Multiplayer.Client;
+
+import ch.unibas.dmi.dbis.cs108.Multiplayer.Protocol.NTtBCommands;
+
+import java.util.HashMap;
+
+public class InputToProtocolMap extends HashMap<String, NTtBCommands> {
+    public InputToProtocolMap(){
+        super();
+        this.put("chat", NTtBCommands.CHATA);
+        this.put("cn", NTtBCommands.CUSRN);
+        this.put("list", NTtBCommands.LISTP);
+        this.put("exit", NTtBCommands.LEAVG);
+        //TODO extend according to extended function
+    }
+}

src/main/java/ch/unibas/dmi/dbis/cs108/Multiplayer/Client/NTtBProtocolParser.java

@@ -2,43 +2,86 @@ package ch.unibas.dmi.dbis.cs108.Multiplayer.Client;
 
 import ch.unibas.dmi.dbis.cs108.Multiplayer.Protocol.NTtBCommands;
 import ch.unibas.dmi.dbis.cs108.Multiplayer.Protocol.NTtBFormatMsg;
-import ch.unibas.dmi.dbis.cs108.Multiplayer.Protocol.NTtBParameter;
-import ch.unibas.dmi.dbis.cs108.Multiplayer.Protocol.ProtocolParser;
 
 import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.Locale;
 import java.util.Scanner;
 
+/**
+ * Implements a protocol parser for the NTtB protocoll,
+ * that transforms client input
+ * into a server readable format.
+ */
 public class NTtBProtocolParser implements ProtocolParser {
     //TODO Possibly bad name, rename to clientMsgParser?
-    public static HashMap<String, NTtBCommands> inputMapper;
+    public final Client caller;
+    public static InputToProtocolMap legalCommands = new InputToProtocolMap();
 
-    public NTtBProtocolParser(){
-        this.inputMapper = new HashMap<>();
-        this.inputMapper.put("chat",NTtBCommands.CHATG);
+
+    public NTtBProtocolParser(Client caller) {
+        this.caller = caller;
         //TODO by far not done!
     }
     @Override
-    public NTtBFormatMsg parseMsg(String msg) {
+    public String parseMsg(String msg) {
         Scanner sc = new Scanner(msg);
+        String parsedMsg;
+
         ArrayList<String> input = new ArrayList<>();
+
         while(sc.hasNext()){
             input.add(sc.next());
         }
-        buildProtocolMsg(input);
-        return null;
-        //TODO needs to be finnished
+
+        try {
+             parsedMsg = buildProtocolMsg(input);
+        } catch (EmptyClientInputException e) {
+            return e.getExceptionMsg();
+            //TODO Where to we log this?
         }
 
-    private String buildProtocolMsg(ArrayList<String> input) {
-        //TODO
-        String cmd = parseCmd(input.get(0));
-        input.remove(0);
-        return "";
+        return parsedMsg;
     }
 
-    private String parseCmd(String s){
+
+    private String buildProtocolMsg(ArrayList<String> input) throws EmptyClientInputException{
         //TODO
-        return "";
+        if(emptyClientInput(input)){
+            throw new EmptyClientInputException(caller);
+        }
+        StringBuilder s = new StringBuilder(); //friendly little helper
+        s.append(legalCommands.get(input.get(0)));
+        if (containsParameters(input)) {
+            int size = input.size();
+            for(int i = 1; i < size; i++) {
+                s.append("$");
+                s.append(input.get(i).toLowerCase());
+            }
+        }
+        return s.toString();
+    }
+
+    /**
+     * Checks if input has parameters
+     *
+     * if the list size is smaller than 2, i.e.
+     * not larger than 1, the input only contains
+     * a command.
+     *
+     * @param input the tokenized input string.
+     * @return true if input list is larger than 2.
+     */
+    private boolean containsParameters(ArrayList<String> input) {
+        return input.size() > 1;
+    }
+
+    /**
+     * checks if client input is empty
+     * @param clientInput the clients input.
+     * @return true if client didn't send any input besides whitespace
+     */
+    private boolean emptyClientInput(ArrayList<String> clientInput) {
+        return clientInput.isEmpty();
     }
 }

src/main/java/ch/unibas/dmi/dbis/cs108/Multiplayer/Client/ProtocolParser.java

@@ -0,0 +1,14 @@
+package ch.unibas.dmi.dbis.cs108.Multiplayer.Client;
+
+import ch.unibas.dmi.dbis.cs108.Multiplayer.Protocol.NTtBFormatMsg;
+import ch.unibas.dmi.dbis.cs108.Multiplayer.Protocol.ProtocolMessage;
+
+public interface ProtocolParser {
+    /**
+     * Takes a String from client input and parses into
+     * server readable message.
+     * @param msg the message to be parsed
+     * @return a String message formatted for the specific protocol
+     */
+    String parseMsg(String msg);
+}

src/main/java/ch/unibas/dmi/dbis/cs108/Multiplayer/Protocol/NTtBCommands.java

@@ -15,5 +15,5 @@ public enum NTtBCommands {
      * QUITS: quit server/ leave servr
      * LISTP: list players/clients in session with the Server
      */
-    CRTGM, CHATA, CHATW, CHATG, LEAVG, JOING, VOTEG, QUITS, LISTP
+    CRTGM, CHATA, CHATW, CHATG, LEAVG, JOING, VOTEG, QUITS, LISTP, CUSRN
 }

src/main/java/ch/unibas/dmi/dbis/cs108/Multiplayer/Protocol/ProtocolParser.java

@@ -1,8 +0,0 @@
-package ch.unibas.dmi.dbis.cs108.Multiplayer.Protocol;
-
-import ch.unibas.dmi.dbis.cs108.Multiplayer.Protocol.NTtBFormatMsg;
-
-public interface ProtocolParser {
-
-    ProtocolMessage parseMsg(String msg);
-}