+
−/*
+
− * Java net client for Hedgewars, a free turn based strategy game
+
− * Copyright (c) 2011 Richard Karolyi <sheepluva@ercatec.net>
+
− *
+
− * This program is free software; you can redistribute it and/or modify
+
− * it under the terms of the GNU General Public License as published by
+
− * the Free Software Foundation; version 2 of the License
+
− *
+
− * This program is distributed in the hope that it will be useful,
+
− * but WITHOUT ANY WARRANTY; without even the implied warranty of
+
− * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+
− * GNU General Public License for more details.
+
− *
+
− * You should have received a copy of the GNU General Public License
+
− * along with this program; if not, write to the Free Software
+
− * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+
− */
+
−
+
−package net.ercatec.hw;
+
−
+
−import java.util.Arrays;
+
−import java.util.List;
+
−import java.util.Iterator;
+
−
+
−public final class ProtocolMessage
+
−{
+
−    public static final int ROOM_FIELD_COUNT = 9;
+
−
+
−    private static int minServerVersion = 49;
+
−
+
−    public static enum Type {
+
−        // for unknown message types
+
−        _UNKNOWN_MESSAGETYPE_,
+
−        // server messages
+
−        ERROR,
+
−        PING,
+
−        PONG,
+
−        NICK,
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−        PROTO,
+
−        ASKPASSWORD,
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−        SERVER_AUTH,
+
−        CONNECTED,
+
−        SERVER_MESSAGE,
+
−        BYE,
+
−        INFO,
+
−        NOTICE,
+
−        CHAT,
+
−        LOBBY__JOINED,
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−        LOBBY__LEFT,
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−        ROOMS,
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−        ROOM,
+
−        ROOM_ADD,
+
−        ROOM_DEL,
+
−        ROOM_UPD,
+
−        ROOM__JOINED,
+
−        ROOM__LEFT,
+
−        CFG,
+
−        TOGGLE_RESTRICT_TEAMS,
+
−        CLIENT_FLAGS,
+
−        CF, // this just an alias and will be mapped to CLIENT_FLAGS
+
−        EM // engine messages
+
−    }
+
−
+
−    public final boolean isValid;
+
−    private Type type;
+
−    private String[] args;
+
−
+
−/*
+
−    public ProtocolMessage(String messageType)
+
−    {
+
−        args = new String[0];
+
−
+
−        try
+
−        {
+
−            type = Type.valueOf(messageType);
+
−            isValid = messageSyntaxIsValid();
+
−        }
+
−        catch (IllegalArgumentException whoops)
+
−        {
+
−            type = Type._UNKNOWN_MESSAGETYPE_;
+
−            args = new String[] { messageType };
+
−            isValid = false;
+
−        }
+
−    }
+
−*/
+
−
+
−    private final String[] emptyArgs = new String[0];
+
−
+
−    private String[] withoutFirst(final String[] array, final int amount) {
+
−        return Arrays.copyOfRange(array, amount, array.length);
+
−    }
+
−
+
−    private final List<String> parts;
+
−
+
−    // invalid Message
+
−    public ProtocolMessage() {
+
−        this.parts =  Arrays.asList(emptyArgs);
+
−        this.args = emptyArgs;
+
−        this.isValid = false;
+
−    }
+
−
+
−    public ProtocolMessage(final List<String> parts)
+
−    {
+
−        this.parts = parts;
+
−        this.args = emptyArgs;
+
−
+
−        final int partc = parts.size();
+
−
+
−        if (partc < 1) {
+
−            isValid = false;
+
−            return;
+
−        }
+
−
+
−        try {
+
−            type = Type.valueOf(parts.get(0).replaceAll(":", "__"));
+
−        }
+
−        catch (IllegalArgumentException whoops) {
+
−            type = Type._UNKNOWN_MESSAGETYPE_;
+
−        }
+
−
+
−        if (type == Type._UNKNOWN_MESSAGETYPE_) {
+
−            args = parts.toArray(args);
+
−            isValid = false;
+
−        }
+
−        else {
+
−            // all parts after command become arguments
+
−            if (partc > 1)
+
−                args = withoutFirst(parts.toArray(args), 1);
+
−            isValid = checkMessage();
+
−        }
+
−    }
+
−
+
−    private boolean checkMessage()
+
−    {
+
−        int argc = args.length;
+
−
+
−        switch (type)
+
−        {
+
−            // no arguments allowed
+
−            case PING:
+
−            case PONG:
+
−            case TOGGLE_RESTRICT_TEAMS:
+
−                if (argc != 0)
+
−                    return false;
+
−                break;
+
−
+
−            // one argument or more
+
−            case EM: // engine messages
+
−            case LOBBY__JOINED: // list of joined players
+
−            case ROOM__JOINED: // list of joined players
+
−                if (argc < 1)
+
−                    return false;
+
−                break;
+
−
+
−            // one argument
+
−            case SERVER_MESSAGE:
+
−            case BYE: // disconnect reason
+
−            case ERROR: // error message
+
−            case NICK: // nickname
+
−            case PROTO: // protocol version
+
−            case SERVER_AUTH: // last stage of mutual of authentication
+
−            case ASKPASSWORD: // request for auth with salt
+
−                if (argc != 1)
+
−                    return false;
+
−                break;
+
−
+
−            case NOTICE: // argument should be a number
+
−                if (argc != 1)
+
−                    return false;
+
−                try {
+
−                    Integer.parseInt(args[0]);
+
−                } 
+
−                catch (NumberFormatException e) {
+
−                    return false;
+
−                }
+
−                break;
+
−
+
−            // two arguments
+
−            case CONNECTED: // server description and version
+
−            case CHAT: // player nick and chat message
+
−            case LOBBY__LEFT: // player nick and leave reason
+
−            case ROOM__LEFT: // player nick and leave reason
+
−                if (argc != 2)
+
−                    return false;
+
−                break;
+
−                
+
−            case ROOM: // "ADD" (or "UPD" + room name ) + room attrs or "DEL" and room name
+
−                if(argc < 2)
+
−                    return false;
+
−
+
−                final String subC = args[0];
+
−
+
−                if (subC.equals("ADD")) {
+
−                    if(argc != ROOM_FIELD_COUNT + 1)
+
−                        return false;
+
−                    this.type = Type.ROOM_ADD;
+
−                    this.args = withoutFirst(args, 1);
+
−                }
+
−                else if (subC.equals("UPD")) {
+
−                    if(argc != ROOM_FIELD_COUNT + 2)
+
−                        return false;
+
−                    this.type = Type.ROOM_UPD;
+
−                    this.args = withoutFirst(args, 1);
+
−                }
+
−                else if (subC.equals("DEL") && (argc == 2)) {
+
−                    this.type = Type.ROOM_DEL;
+
−                    this.args = withoutFirst(args, 1);
+
−                }
+
−                else
+
−                    return false;
+
−                break;
+
−
+
−            // two arguments or more
+
−            case CFG: // setting name and list of setting parameters
+
−                if (argc < 2)
+
−                    return false;
+
−                break;
+
−            case CLIENT_FLAGS: // string of changed flags and player name(s)
+
−            case CF: // alias of CLIENT_FLAGS
+
−                if (argc < 2)
+
−                    return false;
+
−                if (this.type == Type.CF)
+
−                    this.type = Type.CLIENT_FLAGS;
+
−                break;
+
−
+
−            // four arguments
+
−            case INFO: // info about a player, name, ip/id, version, room
+
−                if (argc != 4)
+
−                    return false;
+
−                break;
+
−
+
−            // multiple of ROOM_FIELD_COUNT arguments (incl. 0)
+
−            case ROOMS:
+
−                if (argc % ROOM_FIELD_COUNT != 0)
+
−                    return false;
+
−                break;
+
−        }
+
−
+
−        return true;
+
−    }
+
−
+
−    private void maybeSendPassword() {
+
−        
+
−    }
+
−
+
−    public Type getType()
+
−    {
+
−        return type;
+
−    }
+
−
+
−    public String[] getArguments()
+
−    {
+
−        return args;
+
−    }
+
−
+
−    public boolean isValid()
+
−    {
+
−        return isValid;
+
−    }
+
−
+
−    public static String partsToString(final List<String> parts)
+
−    {
+
−        final Iterator<String> iter = parts.iterator();
+
−
+
−        if (!iter.hasNext())
+
−            return "( -EMPTY- )";
+
−
+
−        String result = "(\"" + iter.next();
+
−
+
−        while (iter.hasNext()) {
+
−            result += "\", \"" + iter.next();
+
−        }
+
−
+
−        return result + "\")";
+
−    }
+
−
+
−    public String toString() {
+
−        return partsToString(this.parts);
+
−    }
+
−}