Java tutorial
/* * 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, either version 3 of the License, or (at your option) any later * version. * * 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, see <http://www.gnu.org/licenses/>. */ package com.l2jfree.gameserver; import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.FileWriter; import java.io.IOException; import java.io.InputStreamReader; import java.util.ArrayList; import java.util.Date; import java.util.List; import java.util.StringTokenizer; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import com.l2jfree.Config; import com.l2jfree.gameserver.cache.HtmCache; import com.l2jfree.gameserver.gameobjects.L2Player; import com.l2jfree.gameserver.instancemanager.IrcManager; import com.l2jfree.gameserver.model.world.L2World; import com.l2jfree.gameserver.network.SystemChatChannelId; import com.l2jfree.gameserver.network.SystemMessageId; import com.l2jfree.gameserver.network.packets.L2ServerPacket; import com.l2jfree.gameserver.network.packets.server.CreatureSay; import com.l2jfree.gameserver.network.packets.server.NpcHtmlMessage; import com.l2jfree.gameserver.network.packets.server.SystemMessage; import com.l2jfree.gameserver.script.DateRange; import com.l2jfree.lang.L2TextBuilder; /** * This class ... * * @version $Revision: 1.5.2.1.2.7 $ $Date: 2005/03/29 23:15:14 $ */ public class Announcements { private final static Log _log = LogFactory.getLog(Announcements.class); private final List<String> _announcements = new ArrayList<String>(); private final List<List<Object>> _eventAnnouncements = new ArrayList<List<Object>>(); private Announcements() { loadAnnouncements(); } public static Announcements getInstance() { return SingletonHolder._instance; } public void loadAnnouncements() { _announcements.clear(); File file = new File(Config.DATAPACK_ROOT, "data/announcements.txt"); if (file.exists()) { readFromDisk(file); } else { _log.info("data/announcements.txt doesn't exist"); } } public void showAnnouncements(L2Player activeChar) { for (int i = 0; i < _announcements.size(); i++) { CreatureSay cs = new CreatureSay(0, SystemChatChannelId.Chat_Announce, activeChar.getName(), _announcements.get(i).replace("%name%", activeChar.getName())); activeChar.sendPacket(cs); } Date currentDate = new Date(); for (int i = 0; i < _eventAnnouncements.size(); i++) { List<Object> entry = _eventAnnouncements.get(i); DateRange validDateRange = (DateRange) entry.get(0); String[] msg = (String[]) entry.get(1); if (validDateRange.isValid() && validDateRange.isWithinRange(currentDate)) { SystemMessage sm = new SystemMessage(SystemMessageId.S1); for (String element : msg) sm.addString(element); activeChar.sendPacket(sm); } } } public void addEventAnnouncement(DateRange validDateRange, String[] msg) { ArrayList<Object> entry = new ArrayList<Object>(); entry.add(validDateRange); entry.add(msg); entry.trimToSize(); _eventAnnouncements.add(entry); } public void listAnnouncements(L2Player activeChar) { String content = HtmCache.getInstance().getHtmForce("data/html/admin/announce.htm"); NpcHtmlMessage adminReply = new NpcHtmlMessage(5); adminReply.setHtml(content); L2TextBuilder replyMSG = L2TextBuilder.newInstance(); replyMSG.append("<br>"); for (int i = 0; i < _announcements.size(); i++) { replyMSG.append("<table width=260><tr><td width=220>"); replyMSG.append(_announcements.get(i)); replyMSG.append( "</td><td width=40><button value=\"Delete\" action=\"bypass -h admin_del_announcement "); replyMSG.append(i); replyMSG.append( "\" width=60 height=15 back=\"L2UI_ct1.button_df\" fore=\"L2UI_ct1.button_df\"></td></tr></table>"); } adminReply.replace("%announces%", replyMSG.moveToString()); activeChar.sendPacket(adminReply); } public void addAnnouncement(String text) { _announcements.add(text); saveToDisk(); } public void delAnnouncement(int line) { _announcements.remove(line); saveToDisk(); } private void readFromDisk(File file) { BufferedReader lnr = null; try { int i = 0; String line = null; lnr = new BufferedReader(new InputStreamReader(new FileInputStream(file), "UTF-8")); while ((line = lnr.readLine()) != null) { StringTokenizer st = new StringTokenizer(line, "\n\r"); if (st.hasMoreTokens()) { String announcement = st.nextToken(); _announcements.add(announcement); i++; } } if (_log.isDebugEnabled()) _log.info("Announcements: Loaded " + i + " Announcements."); } catch (IOException e1) { _log.fatal("Error reading announcements", e1); } finally { try { if (lnr != null) lnr.close(); } catch (Exception e) { e.printStackTrace(); } } } private void saveToDisk() { File file = new File("data/announcements.txt"); FileWriter save = null; try { save = new FileWriter(file); for (int i = 0; i < _announcements.size(); i++) { save.write(_announcements.get(i)); save.write("\r\n"); } } catch (IOException e) { _log.warn("saving the announcements file has failed: ", e); } finally { try { if (save != null) save.close(); } catch (Exception e) { } } } public void announceToAll(String text) { CreatureSay cs = new CreatureSay(0, SystemChatChannelId.Chat_Announce, "", text); if (Config.IRC_ENABLED && Config.IRC_ANNOUNCE) IrcManager.getInstance().getConnection().sendChan("10Announce: " + text); for (L2Player player : L2World.getInstance().getAllPlayers()) { player.sendPacket(cs); } } public void announceToAll(L2ServerPacket gsp) { for (L2Player player : L2World.getInstance().getAllPlayers()) { player.sendPacket(gsp); } } public void announceToAll(SystemMessageId sm) { for (L2Player player : L2World.getInstance().getAllPlayers()) { player.sendPacket(sm); } } public void announceToInstance(L2ServerPacket gsp, int instanceId) { for (L2Player player : L2World.getInstance().getAllPlayers()) { if (player.isSameInstance(instanceId)) player.sendPacket(gsp); } } // Method fo handling announcements from admin public void handleAnnounce(String command, int lengthToTrim) { try { // Announce string to everyone on server String text = command.substring(lengthToTrim); announceToAll(text); } // No body cares! catch (StringIndexOutOfBoundsException e) { // empty message.. ignore } } /** * Announce to players.<BR> * <BR> * * @param message * The String of the message to send to player */ public void announceToPlayers(String message) { // Get all players for (L2Player player : L2World.getInstance().getAllPlayers()) player.sendMessage(message); } @SuppressWarnings("synthetic-access") private static class SingletonHolder { protected static final Announcements _instance = new Announcements(); } }