Macros.java

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/*
 * This file is part of JXClient, the Fullscreen Java Crossfire Client.
 *
 * JXClient 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; either version 2 of the License, or
 * (at your option) any later version.
 *
 * JXClient 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 JXClient; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Copyright (C) 2005-2008 Yann Chachkoff.
 * Copyright (C) 2006-2011 Andreas Kirschbaum.
 */

package com.realtime.crossfire.jxclient.settings;

import com.realtime.crossfire.jxclient.protocol.MessageTypes;
import com.realtime.crossfire.jxclient.server.crossfire.CrossfireDrawextinfoListener;
import com.realtime.crossfire.jxclient.server.crossfire.CrossfireServerConnection;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.jetbrains.annotations.NotNull;

public class Macros {

    @NotNull
    private static final String REPLY_TO = "reply_to";

    @NotNull
    private final Pattern macroPattern = Pattern.compile("<<([a-z_]+)>>");

    @NotNull
    private final Map<String, String> expansions = new HashMap<>();

    @NotNull
    @SuppressWarnings("FieldCanBeLocal")
    private final CrossfireDrawextinfoListener crossfireDrawextinfoListener = new CrossfireDrawextinfoListener() {

        @Override
        public void commandDrawextinfoReceived(final int color, final int type, final int subtype, @NotNull final String message) {
            switch (type) {
            case MessageTypes.MSG_TYPE_BOOK:
            case MessageTypes.MSG_TYPE_CARD:
            case MessageTypes.MSG_TYPE_PAPER:
            case MessageTypes.MSG_TYPE_SIGN:
            case MessageTypes.MSG_TYPE_MONUMENT:
            case MessageTypes.MSG_TYPE_DIALOG:
            case MessageTypes.MSG_TYPE_MOTD:
            case MessageTypes.MSG_TYPE_ADMIN:
            case MessageTypes.MSG_TYPE_SHOP:
            case MessageTypes.MSG_TYPE_COMMAND:
            case MessageTypes.MSG_TYPE_ATTRIBUTE:
            case MessageTypes.MSG_TYPE_SKILL:
            case MessageTypes.MSG_TYPE_APPLY:
            case MessageTypes.MSG_TYPE_ATTACK:
                break;

            case MessageTypes.MSG_TYPE_COMMUNICATION:
                if (subtype == MessageTypes.MSG_TYPE_COMMUNICATION_TELL) {
                    final int index = message.indexOf(" tells you:");
                    if (index != -1) {
                        final String name = message.substring(0, index);
                        expansions.put(REPLY_TO, name);
                    }
                }
                break;

            case MessageTypes.MSG_TYPE_SPELL:
            case MessageTypes.MSG_TYPE_ITEM:
            case MessageTypes.MSG_TYPE_MISC:
            case MessageTypes.MSG_TYPE_VICTIM:
            default:
                break;
            }
        }

        @Override
        public void setDebugMode(final boolean printMessageTypes) {
            // ignore
        }

    };

    public Macros(@NotNull final CrossfireServerConnection crossfireServerConnection) {
        expansions.put(REPLY_TO, "");
        crossfireServerConnection.addCrossfireDrawextinfoListener(crossfireDrawextinfoListener);
    }

    @NotNull
    public String expandMacros(@NotNull final String string) {
        StringBuilder result = null;
        int index = 0;
        final Matcher macroMatcher = macroPattern.matcher(string);
        while (macroMatcher.find()) {
            if (result == null) {
                result = new StringBuilder();
            }

            final String name = macroMatcher.group(1);
            String expansion = expansions.get(name);
            if (expansion == null) {
                expansion = macroMatcher.group(); // do not expand unknown macro names
            }
            result.append(string.substring(index, macroMatcher.start()));
            result.append(expansion);
            index = macroMatcher.end();
        }
        if (result != null) {
            result.append(string.substring(index, string.length()));
        }
        return result == null ? string : result.toString();
    }

}