com.threerings.crowd.chat.client.ChatDirector Maven / Gradle / Ivy
//
// $Id$
//
// Narya library - tools for developing networked games
// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
// http://code.google.com/p/narya/
//
// This library is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License as published
// by the Free Software Foundation; either version 2.1 of the License, or
// (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
package com.threerings.crowd.chat.client;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.Map;
import java.util.StringTokenizer;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import com.google.common.base.Joiner;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.google.common.collect.Sets;
import com.samskivert.util.HashIntMap;
import com.samskivert.util.ObserverList;
import com.samskivert.util.ResultListener;
import com.samskivert.util.StringUtil;
import com.threerings.util.MessageBundle;
import com.threerings.util.Name;
import com.threerings.util.TimeUtil;
import com.threerings.presents.client.BasicDirector;
import com.threerings.presents.client.Client;
import com.threerings.presents.data.ClientObject;
import com.threerings.presents.dobj.DObject;
import com.threerings.presents.dobj.MessageEvent;
import com.threerings.presents.dobj.MessageListener;
import com.threerings.crowd.chat.data.ChatCodes;
import com.threerings.crowd.chat.data.ChatMessage;
import com.threerings.crowd.chat.data.SystemMessage;
import com.threerings.crowd.chat.data.TellFeedbackMessage;
import com.threerings.crowd.chat.data.UserMessage;
import com.threerings.crowd.chat.data.UserSystemMessage;
import com.threerings.crowd.client.LocationObserver;
import com.threerings.crowd.data.BodyObject;
import com.threerings.crowd.data.CrowdCodes;
import com.threerings.crowd.data.PlaceObject;
import com.threerings.crowd.util.CrowdContext;
import static com.threerings.crowd.Log.log;
/**
* The chat director is the client side coordinator of all chat related services. It handles both
* place constrained chat as well as direct messaging.
*/
public class ChatDirector extends BasicDirector
implements ChatCodes, LocationObserver, MessageListener
{
/**
* An interface to receive information about the {@link #MAX_CHATTERS} most recent users that
* we've been chatting with.
*/
public static interface ChatterObserver
{
/**
* Called when the list of chatters has been changed.
*/
void chattersUpdated (Iterator chatternames);
}
/**
* An interface for those who would like to validate whether usernames may be added to the
* chatter list.
*/
public static interface ChatterValidator
{
/**
* Returns whether the username may be added to the chatters list.
*/
boolean isChatterValid (Name username);
}
/**
* Used to implement a slash command (e.g. /who).
*/
public abstract static class CommandHandler
{
/**
* Returns the translatable usage message for the specified command.
*/
public String getUsage (String command)
{
return MessageBundle.tcompose(_usageKey,
_showAliasesInUsage ? Joiner.on('|').join(_aliases) : command);
}
/**
* Handles the specified chat command.
*
* @param speakSvc an optional SpeakService object representing the object to send the chat
* message on.
* @param command the slash command that was used to invoke this handler
* (e.g. /tell).
* @param args the arguments provided along with the command (e.g. Bob hello)
* or null if no arguments were supplied.
* @param history an in/out parameter that allows the command to modify the text that will
* be appended to the chat history. If this is set to null, nothing will be appended.
*
* @return an untranslated string that will be reported to the chat box to convey an error
* response to the user, or {@link ChatCodes#SUCCESS}.
*/
public abstract String handleCommand (SpeakService speakSvc, String command, String args,
String[] history);
/**
* Returns true if this user should have access to this chat command.
*/
public boolean checkAccess (BodyObject user) {
return true;
}
/** The command's usage message translation key. */
protected String _usageKey;
/** The command's translated aliases. */
protected String[] _aliases;
}
/**
* Creates a chat director and initializes it with the supplied context. The chat director will
* register itself as a location observer so that it can automatically process place
* constrained chat.
*
* @param bundle the message bundle from which we obtain our chat-related translation strings.
*/
public ChatDirector (CrowdContext ctx, String bundle)
{
super(ctx);
// keep the context around
_ctx = ctx;
_bundle = bundle;
// register ourselves as a location observer
_ctx.getLocationDirector().addLocationObserver(this);
// register our default chat handlers
if (_bundle == null || _ctx.getMessageManager() == null) {
log.warning("Null bundle or message manager given to ChatDirector");
return;
}
registerCommandHandlers();
}
/**
* Adds the supplied chat display to the front of the chat display list. It will subsequently
* be notified of incoming chat messages as well as tell responses.
*/
public void pushChatDisplay (ChatDisplay display)
{
_displays.add(0, display);
}
/**
* Adds the supplied chat display to the end of the chat display list. It will subsequently be
* notified of incoming chat messages as well as tell responses.
*/
public boolean addChatDisplay (ChatDisplay display)
{
return _displays.add(display);
}
/**
* Removes the specified chat display from the chat display list. The display will no longer
* receive chat related notifications.
*/
public boolean removeChatDisplay (ChatDisplay display)
{
return _displays.remove(display);
}
/**
* Adds the specified chat filter to the list of filters. All chat requests and receipts will
* be filtered with all filters before they being sent or dispatched locally.
*/
public boolean addChatFilter (ChatFilter filter)
{
return _filters.add(filter);
}
/**
* Removes the specified chat filter from the list of chat filter.
*/
public boolean removeChatFilter (ChatFilter filter)
{
return _filters.remove(filter);
}
/**
* Adds an observer that watches the chatters list, and updates it immediately.
*/
public boolean addChatterObserver (ChatterObserver co)
{
boolean added = _chatterObservers.add(co);
co.chattersUpdated(_chatters.listIterator());
return added;
}
/**
* Removes an observer from the list of chatter observers.
*/
public boolean removeChatterObserver (ChatterObserver co)
{
return _chatterObservers.remove(co);
}
/**
* Sets the validator that decides if a username is valid to be added to the chatter list, or
* null if no such filtering is desired.
*/
public void setChatterValidator (ChatterValidator validator)
{
_chatterValidator = validator;
}
/**
* Enables or disables the chat mogrifier. The mogrifier converts chat speak like LOL, WTF,
* etc. into phrases, words and can also transform them into emotes. The mogrifier is
* configured via the x.mogrifies and x.transforms translation
* properties.
*/
public void setMogrifyChat (boolean mogrifyChat)
{
_mogrifyChat = mogrifyChat;
}
/**
* Registers a chat command handler.
*
* @param msg the message bundle via which the slash command will be translated (as
* c.command). If no translation exists the command will be
* /command.
* @param command the name of the command that will be used to invoke this handler (e.g.
* tell if the command will be invoked as /tell).
* @param handler the chat command handler itself.
*/
public void registerCommandHandler (MessageBundle msg, String command, CommandHandler handler)
{
// the usage key is derived from the untranslated command
handler._usageKey = "m.usage_" + command;
String key = "c." + command;
handler._aliases = msg.exists(key) ? msg.get(key).split("\\s+") : new String[] { command };
for (String alias : handler._aliases) {
_handlers.put(alias, handler);
}
}
/**
* Return the current size of the history.
*/
public int getCommandHistorySize ()
{
return _history.size();
}
/**
* Get the chat history entry at the specified index, with 0 being the oldest.
*/
public String getCommandHistory (int index)
{
return _history.get(index);
}
/**
* Clear the chat command history.
*/
public void clearCommandHistory ()
{
_history.clear();
}
/**
* Requests that all chat displays clear their contents.
*/
public void clearDisplays ()
{
_displays.apply(new ObserverList.ObserverOp() {
public boolean apply (ChatDisplay observer) {
observer.clear();
return true;
}
});
}
/**
* Display a system INFO message as if it had come from the server. The localtype of the
* message will be PLACE_CHAT_TYPE.
*
* Info messages are sent when something happens that was neither directly triggered by the
* user, nor requires direct action.
*/
public void displayInfo (String bundle, String message)
{
displaySystem(bundle, message, SystemMessage.INFO, PLACE_CHAT_TYPE);
}
/**
* Display a system INFO message as if it had come from the server.
*
* Info messages are sent when something happens that was neither directly triggered by the
* user, nor requires direct action.
*/
public void displayInfo (String bundle, String message, String localtype)
{
displaySystem(bundle, message, SystemMessage.INFO, localtype);
}
/**
* Display a system FEEDBACK message as if it had come from the server. The localtype of the
* message will be PLACE_CHAT_TYPE.
*
* Feedback messages are sent in direct response to a user action, usually to indicate success
* or failure of the user's action.
*/
public void displayFeedback (String bundle, String message)
{
displaySystem(bundle, message, SystemMessage.FEEDBACK, PLACE_CHAT_TYPE);
}
/**
* Display a system ATTENTION message as if it had come from the server. The localtype of the
* message will be PLACE_CHAT_TYPE.
*
* Attention messages are sent when something requires user action that did not result from
* direct action by the user.
*/
public void displayAttention (String bundle, String message)
{
displaySystem(bundle, message, SystemMessage.ATTENTION, PLACE_CHAT_TYPE);
}
/**
* Dispatches the provided message to our chat displays.
*/
public void dispatchMessage (ChatMessage message, String localType)
{
setClientInfo(message, localType);
dispatchPreparedMessage(message);
}
/**
* Parses and delivers the supplied chat message. Slash command processing and mogrification
* are performed and the message is added to the chat history if appropriate.
*
* @param speakSvc the SpeakService representing the target dobj of the speak or null if we
* should speak in the "default" way.
* @param text the text to be parsed and sent.
* @param record if text is a command, should it be added to the history?
*
* @return ChatCodes#SUCCESS if the message was parsed and sent correctly, a
* translatable error string if there was some problem.
*/
public String requestChat (SpeakService speakSvc, String text, boolean record)
{
if (text.startsWith("/")) {
// split the text up into a command and arguments
String command = text.substring(1).toLowerCase();
String[] hist = new String[1];
String args = "";
int sidx = text.indexOf(" ");
if (sidx != -1) {
command = text.substring(1, sidx).toLowerCase();
args = text.substring(sidx + 1).trim();
}
Map possibleCommands = getCommandHandlers(command);
switch (possibleCommands.size()) {
case 0:
StringTokenizer tok = new StringTokenizer(text);
return MessageBundle.tcompose("m.unknown_command", tok.nextToken());
case 1:
Map.Entry entry =
possibleCommands.entrySet().iterator().next();
String cmdName = entry.getKey();
CommandHandler cmd = entry.getValue();
String result = cmd.handleCommand(speakSvc, cmdName, args, hist);
if (!result.equals(ChatCodes.SUCCESS)) {
return result;
}
if (record) {
// get the final history-ready command string
hist[0] = "/" + ((hist[0] == null) ? command : hist[0]);
// remove from history if it was present and add it to the end
addToHistory(hist[0]);
}
return result;
default:
StringBuilder buf = new StringBuilder();
for (String pcmd : Sets.newTreeSet(possibleCommands.keySet())) {
buf.append(" /").append(pcmd);
}
return MessageBundle.tcompose("m.unspecific_command", buf.toString());
}
}
// if not a command then just speak
String message = text.trim();
if (StringUtil.isBlank(message)) {
// report silent failure for now
return ChatCodes.SUCCESS;
}
return deliverChat(speakSvc, message, ChatCodes.DEFAULT_MODE);
}
/**
* Requests that a speak message with the specified mode be generated and delivered via the
* supplied speak service instance (which will be associated with a particular "speak
* object"). The message will first be validated by all registered {@link ChatFilter}s (and
* possibly vetoed) before being dispatched.
*
* @param speakService the speak service to use when generating the speak request or null if we
* should speak in the current "place".
* @param message the contents of the speak message.
* @param mode a speech mode that will be interpreted by the {@link ChatDisplay}
* implementations that eventually display this speak message.
*/
public void requestSpeak (SpeakService speakService, String message, byte mode)
{
if (speakService == null) {
if (_place == null) {
return;
}
speakService = _place.speakService;
}
// make sure they can say what they want to say
message = filter(message, null, true);
if (message == null) {
return;
}
// dispatch a speak request using the supplied speak service
speakService.speak(message, mode);
}
/**
* Requests to send a site-wide broadcast message.
*
* @param message the contents of the message.
*/
public void requestBroadcast (String message)
{
message = filter(message, null, true);
if (message == null) {
displayFeedback(_bundle, MessageBundle.compose("m.broadcast_failed", "m.filtered"));
return;
}
_cservice.broadcast(message, new ChatService.InvocationListener() {
public void requestFailed (String reason) {
reason = MessageBundle.compose("m.broadcast_failed", reason);
displayFeedback(_bundle, reason);
}
});
}
/**
* Requests that a tell message be delivered to the specified target user.
*
* @param target the username of the user to which the tell message should be delivered.
* @param msg the contents of the tell message.
* @param rl an optional result listener if you'd like to be notified of success or failure.
*/
public void requestTell (
final T target, String msg, final ResultListener rl)
{
// make sure they can say what they want to say
final String message = filter(msg, target, true);
if (message == null) {
if (rl != null) {
rl.requestFailed(null);
}
return;
}
// create a listener that will report success or failure
ChatService.TellListener listener = new ChatService.TellListener() {
public void tellSucceeded (long idletime, String awayMessage) {
success();
// if they have an away message, report that
if (awayMessage != null) {
awayMessage = filter(awayMessage, target, false);
if (awayMessage != null) {
String msg = MessageBundle.tcompose("m.recipient_afk", target, awayMessage);
displayFeedback(_bundle, msg);
}
}
// if they are idle, report that
if (idletime > 0L) {
// adjust by the time it took them to become idle
idletime += _ctx.getConfig().getValue(IDLE_TIME_KEY, DEFAULT_IDLE_TIME);
String msg = MessageBundle.compose(
"m.recipient_idle", MessageBundle.taint(target),
TimeUtil.getTimeOrderString(idletime, TimeUtil.MINUTE));
displayFeedback(_bundle, msg);
}
}
protected void success () {
dispatchMessage(new TellFeedbackMessage(target, message, false),
ChatCodes.PLACE_CHAT_TYPE);
addChatter(target);
if (rl != null) {
rl.requestCompleted(target);
}
}
public void requestFailed (String reason) {
String msg = MessageBundle.compose(
"m.tell_failed", MessageBundle.taint(target), reason);
TellFeedbackMessage tfm = new TellFeedbackMessage(target, msg, true);
tfm.bundle = _bundle;
dispatchMessage(tfm, ChatCodes.PLACE_CHAT_TYPE);
if (rl != null) {
rl.requestFailed(null);
}
}
};
_cservice.tell(target, message, listener);
}
/**
* Configures a message that will be automatically reported to anyone that sends a tell message
* to this client to indicate that we are busy or away from the keyboard.
*/
public void setAwayMessage (String message)
{
if (message != null) {
message = filter(message, null, true);
if (message == null) {
// they filtered away their own away message... change it to something
message = "...";
}
}
// pass the buck right on along
_cservice.away(message);
}
/**
* Adds an additional object via which chat messages may arrive. The chat director assumes the
* caller will be managing the subscription to this object and will remain subscribed to it for
* as long as it remains in effect as an auxiliary chat source.
*
* @param localtype a type to be associated with all chat messages that arrive on the specified
* DObject.
*/
public void addAuxiliarySource (DObject source, String localtype)
{
source.addListener(this);
_auxes.put(source.getOid(), localtype);
}
/**
* Removes a previously added auxiliary chat source.
*/
public void removeAuxiliarySource (DObject source)
{
source.removeListener(this);
_auxes.remove(source.getOid());
}
/**
* Returns the history list containing a trailing window of messages that have passed through
* this chat director. The history list is created on demand so that systems which don't make
* use of chat history need not incur the overhead of tracking historical chat messages. Thus
* messages will only be added to the history after this method has been called at
* least once.
*/
public HistoryList getHistory ()
{
if (_hlist == null) {
addChatDisplay(_hlist = new HistoryList());
}
return _hlist;
}
/**
* Run a message through all the currently registered filters.
*/
public String filter (String msg, Name otherUser, boolean outgoing)
{
_filterMessageOp.setMessage(msg, otherUser, outgoing);
_filters.apply(_filterMessageOp);
return _filterMessageOp.getMessage();
}
/**
* Runs the supplied message through the various chat mogrifications.
*/
public String mogrifyChat (String text)
{
return mogrifyChat(text, (byte)-1, false, true);
}
// documentation inherited
public boolean locationMayChange (int placeId)
{
// we accept all location change requests
return true;
}
// documentation inherited
public void locationDidChange (PlaceObject place)
{
if (_place != null) {
// unlisten to our old object
_place.removeListener(this);
}
// listen to the new object
_place = place;
if (_place != null) {
_place.addListener(this);
}
}
// documentation inherited
public void locationChangeFailed (int placeId, String reason)
{
// nothing we care about
}
// documentation inherited
public void messageReceived (MessageEvent event)
{
if (CHAT_NOTIFICATION.equals(event.getName())) {
ChatMessage msg = (ChatMessage)event.getArgs()[0];
String localtype = getLocalType(event.getTargetOid());
processReceivedMessage(msg, localtype);
}
}
@Override
public void clientDidLogon (Client client)
{
super.clientDidLogon(client);
// listen on the client object for tells
addAuxiliarySource(_clobj = client.getClientObject(), USER_CHAT_TYPE);
}
@Override
public void clientObjectDidChange (Client client)
{
super.clientObjectDidChange(client);
// change what we're listening to for tells
removeAuxiliarySource(_clobj);
addAuxiliarySource(_clobj = client.getClientObject(), USER_CHAT_TYPE);
clearDisplays();
}
@Override
public void clientDidLogoff (Client client)
{
super.clientDidLogoff(client);
// stop listening to it for tells
if (_clobj != null) {
removeAuxiliarySource(_clobj);
_clobj = null;
}
// in fact, clear out all auxiliary sources
_auxes.clear();
clearDisplays();
// clear out the list of people we've chatted with
_chatters.clear();
notifyChatterObservers();
// clear the _place
locationDidChange(null);
// clear our service
_cservice = null;
}
/**
* Registers all the chat-command handlers.
*/
protected void registerCommandHandlers ()
{
MessageBundle msg = _ctx.getMessageManager().getBundle(_bundle);
registerCommandHandler(msg, "help", new HelpHandler());
registerCommandHandler(msg, "clear", new ClearHandler());
registerCommandHandler(msg, "speak", new SpeakHandler());
registerCommandHandler(msg, "emote", new EmoteHandler());
registerCommandHandler(msg, "think", new ThinkHandler());
registerCommandHandler(msg, "tell", new TellHandler());
registerCommandHandler(msg, "broadcast", new BroadcastHandler());
}
/**
* Processes and dispatches the specified chat message.
*/
protected void processReceivedMessage (ChatMessage msg, String localtype)
{
String autoResponse = null;
Name speaker = null;
Name speakerDisplay = null;
byte mode = (byte)-1;
// figure out if the message was triggered by another user
if (msg instanceof UserMessage) {
UserMessage umsg = (UserMessage)msg;
speaker = umsg.speaker;
speakerDisplay = umsg.getSpeakerDisplayName();
mode = umsg.mode;
} else if (msg instanceof UserSystemMessage) {
speaker = ((UserSystemMessage)msg).speaker;
speakerDisplay = speaker;
}
// Translate and timestamp the message. This would happen during dispatch but we
// need to do it ahead of filtering.
setClientInfo(msg, localtype);
// if there was an originating speaker, see if we want to hear it
if (speaker != null) {
if (shouldFilter(msg) && (msg.message = filter(msg.message, speaker, false)) == null) {
return;
}
if (USER_CHAT_TYPE.equals(localtype) &&
mode == ChatCodes.DEFAULT_MODE) {
// if it was a tell, add the speaker as a chatter
addChatter(speaker);
// note whether or not we have an auto-response
BodyObject self = (BodyObject)_ctx.getClient().getClientObject();
if (!StringUtil.isBlank(self.awayMessage)) {
autoResponse = self.awayMessage;
}
}
}
// and send it off!
dispatchMessage(msg, localtype);
// if we auto-responded, report as much
if (autoResponse != null) {
String amsg = MessageBundle.tcompose(
"m.auto_responded", speakerDisplay, autoResponse);
displayFeedback(_bundle, amsg);
}
}
/**
* Checks whether we should filter the supplied incoming message.
*/
protected boolean shouldFilter (ChatMessage msg)
{
return true;
}
/**
* Dispatch a message to chat displays once it is fully prepared with the clientinfo.
*/
protected void dispatchPreparedMessage (ChatMessage message)
{
_displayMessageOp.setMessage(message);
_displays.apply(_displayMessageOp);
}
/**
* Called to determine whether we are permitted to post the supplied chat message. Derived
* classes may wish to throttle chat or restrict certain types in certain circumstances for
* whatever reason.
*
* @return null if the chat is permitted, SUCCESS if the chat is permitted and has already been
* dealt with, or a translatable string indicating the reason for rejection if not.
*/
protected String checkCanChat (SpeakService speakSvc, String message, byte mode)
{
return null;
}
/**
* Delivers a plain chat message (not a slash command) on the specified speak service in the
* specified mode. The message will be mogrified and filtered prior to delivery.
*
* @return {@link ChatCodes#SUCCESS} if the message was delivered or a string indicating why it
* failed.
*/
protected String deliverChat (SpeakService speakSvc, String message, byte mode)
{
// run the message through our mogrification process
message = mogrifyChat(message, mode, true, mode != ChatCodes.EMOTE_MODE);
// mogrification may result in something being turned into a slash command, in which case
// we have to run everything through again from the start
if (message.startsWith("/")) {
return requestChat(speakSvc, message, false);
}
// make sure this client is not restricted from performing this chat message for some
// reason or other
String errmsg = checkCanChat(speakSvc, message, mode);
if (errmsg != null) {
return errmsg;
}
// speak on the specified service
requestSpeak(speakSvc, message, mode);
return ChatCodes.SUCCESS;
}
/**
* Adds the specified command to the history.
*/
protected void addToHistory (String cmd)
{
// remove any previous instance of this command
_history.remove(cmd);
// append it to the end
_history.add(cmd);
// prune the history once it extends beyond max size
if (_history.size() > MAX_COMMAND_HISTORY) {
_history.remove(0);
}
}
/**
* Mogrifies common literary crutches into more appealing chat or commands.
*
* @param mode the chat mode, or -1 if unknown.
* @param transformsAllowed if true, the chat may transformed into a different mode. (lol ->
* /emote laughs)
* @param capFirst if true, the first letter of the text is capitalized. This is not desired if
* the chat is already an emote.
*/
protected String mogrifyChat (
String text, byte mode, boolean transformsAllowed, boolean capFirst)
{
int tlen = text.length();
if (tlen == 0) {
return text;
// check to make sure there aren't too many caps
} else if (tlen > 7 && suppressTooManyCaps()) {
// count caps
int caps = 0;
for (int ii=0; ii < tlen; ii++) {
if (Character.isUpperCase(text.charAt(ii))) {
caps++;
if (caps > (tlen / 2)) {
// lowercase the whole string if there are
text = text.toLowerCase();
break;
}
}
}
}
StringBuffer buf = new StringBuffer(text);
buf = mogrifyChat(buf, transformsAllowed, capFirst);
return buf.toString();
}
/** Helper function for {@link #mogrifyChat(String,byte,boolean,boolean)}. */
protected StringBuffer mogrifyChat (
StringBuffer buf, boolean transformsAllowed, boolean capFirst)
{
if (_mogrifyChat) {
// do the generic mogrifications and translations
buf = translatedReplacements("x.mogrifies", buf);
// perform themed expansions and transformations
if (transformsAllowed) {
buf = translatedReplacements("x.transforms", buf);
}
}
/*
// capitalize the first letter
if (capFirst) {
buf.setCharAt(0, Character.toUpperCase(buf.charAt(0)));
}
// and capitalize any letters after a sentence-ending punctuation
Pattern p = Pattern.compile("([^\\.][\\.\\?\\!](\\s)+\\p{Ll})");
Matcher m = p.matcher(buf);
if (m.find()) {
buf = new StringBuilder();
m.appendReplacement(buf, m.group().toUpperCase());
while (m.find()) {
m.appendReplacement(buf, m.group().toUpperCase());
}
m.appendTail(buf);
}
*/
return buf;
}
/**
* Do all the replacements (mogrifications) specified in the translation string specified by
* the key.
*/
protected StringBuffer translatedReplacements (String key, StringBuffer buf)
{
MessageBundle bundle = _ctx.getMessageManager().getBundle(_bundle);
if (!bundle.exists(key)) {
return buf;
}
StringTokenizer st = new StringTokenizer(bundle.get(key), "#");
// apply the replacements to each mogrification that matches
while (st.hasMoreTokens()) {
String pattern = st.nextToken();
String replace = st.nextToken();
Matcher m = Pattern.compile(pattern, Pattern.CASE_INSENSITIVE).matcher(buf);
if (m.find()) {
buf = new StringBuffer();
m.appendReplacement(buf, replace);
// they may match more than once
while (m.find()) {
m.appendReplacement(buf, replace);
}
m.appendTail(buf);
}
}
return buf;
}
/**
* Return true if we should lowercase messages containing more than half upper-case characters.
*/
protected boolean suppressTooManyCaps ()
{
return true;
}
/**
* Check that after mogrification the message is not too long.
* @return an error message if it is too long, or null.
*/
protected String checkLength (String msg)
{
return null; // everything's ok by default
}
/**
* Returns a map containing all command handlers that match the specified command (i.e. the
* specified command is a prefix of their registered command string). If there's an exact
* match, only that match is returned, even if the command is a prefix of other handlers.
*/
protected Map getCommandHandlers (String command)
{
HashMap matches = Maps.newHashMap();
BodyObject user = (BodyObject)_ctx.getClient().getClientObject();
for (Map.Entry entry : _handlers.entrySet()) {
if (!isCommandPrefix(command, entry.getKey(), entry.getValue(), user)) {
continue;
}
if (entry.getKey().equals(command)) {// If we hit an exact match, it wins
matches.clear();
matches.put(entry.getKey(), entry.getValue());
return matches;
}
// if we're providing the full list and we show aliases in the usage text,
// only map to the first alias
String key = (_showAliasesInUsage && command.equals("")) ?
entry.getValue()._aliases[0] : entry.getKey();
matches.put(key, entry.getValue());
}
return matches;
}
/**
* Returns true if enteredCommand equals or is a prefix of
* handlerCommand and if the handler is available for user.
*/
protected boolean isCommandPrefix (String enteredCommand, String handlerCommand,
CommandHandler handler, BodyObject user)
{
return handlerCommand.startsWith(enteredCommand) && handler.checkAccess(user);
}
/**
* Adds a chatter to our list of recent chatters.
*/
protected void addChatter (Name name)
{
// check to see if the chatter validator approves..
if ((_chatterValidator != null) && (!_chatterValidator.isChatterValid(name))) {
return;
}
boolean wasthere = _chatters.remove(name);
_chatters.addFirst(name);
if (!wasthere) {
if (_chatters.size() > MAX_CHATTERS) {
_chatters.removeLast();
}
notifyChatterObservers();
}
}
/**
* Notifies all registered {@link ChatterObserver}s that the list of chatters has changed.
*/
protected void notifyChatterObservers ()
{
_chatterObservers.apply(new ObserverList.ObserverOp() {
public boolean apply (ChatterObserver observer) {
observer.chattersUpdated(_chatters.listIterator());
return true;
}
});
}
/**
* Set the "client info" on the specified message, if not already set.
*/
protected void setClientInfo (ChatMessage msg, String localType)
{
if (msg.localtype == null) {
msg.setClientInfo(xlate(msg.bundle, msg.message), localType);
}
}
/**
* Translates the specified message using the specified bundle.
*/
protected String xlate (String bundle, String message)
{
if (bundle != null && _ctx.getMessageManager() != null) {
MessageBundle msgb = _ctx.getMessageManager().getBundle(bundle);
if (msgb == null) {
log.warning("No message bundle available to translate message", "bundle", bundle,
"message", message);
} else {
message = msgb.xlate(message);
}
}
return message;
}
/**
* Display the specified system message as if it had come from the server.
*/
protected void displaySystem (String bundle, String message, byte attLevel, String localtype)
{
// nothing should be untranslated, so pass the default bundle if need be.
if (bundle == null) {
bundle = _bundle;
}
SystemMessage msg = new SystemMessage(message, bundle, attLevel);
dispatchMessage(msg, localtype);
}
/**
* Looks up and returns the message type associated with the specified oid.
*/
protected String getLocalType (int oid)
{
String type = _auxes.get(oid);
return (type == null) ? PLACE_CHAT_TYPE : type;
}
@Override
protected void registerServices (Client client)
{
client.addServiceGroup(CrowdCodes.CROWD_GROUP);
}
@Override
protected void fetchServices (Client client)
{
// get a handle on our chat service
_cservice = client.requireService(ChatService.class);
}
/**
* An operation that checks with all chat filters to properly filter a message prior to sending
* to the server or displaying.
*/
protected static class FilterMessageOp
implements ObserverList.ObserverOp
{
public void setMessage (String msg, Name otherUser, boolean outgoing)
{
_msg = msg;
_otherUser = otherUser;
_out = outgoing;
}
public boolean apply (ChatFilter observer)
{
if (_msg != null) {
_msg = observer.filter(_msg, _otherUser, _out);
}
return true;
}
public String getMessage ()
{
return _msg;
}
protected Name _otherUser;
protected String _msg;
protected boolean _out;
}
/**
* An observer op used to dispatch ChatMessages on the client.
*/
protected static class DisplayMessageOp
implements ObserverList.ObserverOp
{
public void setMessage (ChatMessage message)
{
_message = message;
_displayed = false;
}
public boolean apply (ChatDisplay observer)
{
if (observer.displayMessage(_message, _displayed)) {
_displayed = true;
}
return true;
}
protected ChatMessage _message;
protected boolean _displayed;
}
/** Implements /help. */
protected class HelpHandler extends CommandHandler
{
@Override
public String getUsage (String command)
{
Map possibleCommands = getCommandHandlers("");
possibleCommands.remove(command);
return getUsage(command, possibleCommands);
}
@Override
public String handleCommand (SpeakService speakSvc, String command,
String args, String[] history)
{
// put "/help " in the history
history[0] = command + " ";
String hcmd = "";
// grab the command they want help on
if (!StringUtil.isBlank(args)) {
hcmd = args;
int sidx = args.indexOf(" ");
if (sidx != -1) {
hcmd = args.substring(0, sidx);
}
}
// let the user give commands with or with the /
if (hcmd.startsWith("/")) {
hcmd = hcmd.substring(1);
}
// handle "/help help" and "/help someboguscommand"
Map possibleCommands = getCommandHandlers(hcmd);
String usage;
if (_handlers.get(hcmd) == this || possibleCommands.isEmpty()) {
usage = getUsage(command);
} else if (possibleCommands.size() > 1) {
usage = getUsage(command, possibleCommands);
} else {
// if there is only one possible command display its usage
Map.Entry entry =
possibleCommands.entrySet().iterator().next();
usage = entry.getValue().getUsage(entry.getKey());
}
// this is a little funny, but we display the feedback message by hand and return
// SUCCESS so that the chat entry field doesn't think that we've failed and
// preserve our command text
displayFeedback(null, usage);
return ChatCodes.SUCCESS;
}
/**
* Returns a usage message listing the provided commands.
*/
protected String getUsage (String command, Map possibleCommands)
{
Object[] commands = possibleCommands.keySet().toArray();
Arrays.sort(commands);
String commandList = "";
for (Object element : commands) {
commandList += " /" + element;
}
return MessageBundle.tcompose("m.usage_help", commandList, command);
}
}
/** Implements /clear. */
protected class ClearHandler extends CommandHandler
{
@Override
public String handleCommand (SpeakService speakSvc, String command,
String args, String[] history)
{
clearDisplays();
return ChatCodes.SUCCESS;
}
}
/** Implements /speak. */
protected class SpeakHandler extends CommandHandler
{
@Override
public String handleCommand (SpeakService speakSvc, String command,
String args, String[] history)
{
if (StringUtil.isBlank(args)) {
return getUsage(command);
}
// note the command to be stored in the history
history[0] = command + " ";
// we do not propogate the speakSvc, because /speak means use
// the default channel..
return requestChat(null, args, true);
}
}
/** Implements /emote. */
protected class EmoteHandler extends CommandHandler
{
@Override
public String handleCommand (SpeakService speakSvc, String command,
String args, String[] history)
{
if (StringUtil.isBlank(args)) {
return getUsage(command);
}
// note the command to be stored in the history
history[0] = command + " ";
return deliverChat(speakSvc, args, ChatCodes.EMOTE_MODE);
}
}
/** Implements /think. */
protected class ThinkHandler extends CommandHandler
{
@Override
public String handleCommand (SpeakService speakSvc, String command,
String args, String[] history)
{
if (StringUtil.isBlank(args)) {
return getUsage(command);
}
// note the command to be stored in the history
history[0] = command + " ";
return deliverChat(speakSvc, args, ChatCodes.THINK_MODE);
}
}
/** Implements /tell. */
protected class TellHandler extends CommandHandler
{
@Override
public String handleCommand (SpeakService speakSvc, final String command,
String args, String[] history)
{
if (StringUtil.isBlank(args)) {
return getUsage(command);
}
final boolean useQuotes = args.startsWith("\"");
String[] bits = parseTell(args);
String handle = bits[0];
String message = bits[1];
// validate that we didn't eat all the tokens making the handle
if (StringUtil.isBlank(message)) {
return getUsage(command);
}
// make sure we're not trying to tell something to ourselves
BodyObject self = (BodyObject)_ctx.getClient().getClientObject();
if (handle.equalsIgnoreCase(self.getVisibleName().toString())) {
return "m.talk_self";
}
// and lets just give things an opportunity to sanitize the name
Name target = normalizeAsName(handle);
// mogrify the chat
message = mogrifyChat(message);
String err = checkLength(message);
if (err != null) {
return err;
}
// clear out from the history any tells that are mistypes
for (Iterator iter = _history.iterator(); iter.hasNext(); ) {
String hist = iter.next();
if (hist.startsWith("/" + command)) {
String harg = hist.substring(command.length() + 1).trim();
// we blow away any historic tells that have msg content
if (!StringUtil.isBlank(parseTell(harg)[1])) {
iter.remove();
}
}
}
// store the full command in the history, even if it was mistyped
final String histEntry = command + " " +
(useQuotes ? ("\"" + target + "\"") : target.toString()) + " " + message;
history[0] = histEntry;
// request to send this text as a tell message
requestTell(target, escapeMessage(message), new ResultListener() {
public void requestCompleted (Name target) {
// replace the full one in the history with just: /tell ""
String newEntry = "/" + command + " " +
(useQuotes ? ("\"" + target + "\"") : String.valueOf(target)) + " ";
_history.remove(newEntry);
int dex = _history.lastIndexOf("/" + histEntry);
if (dex >= 0) {
_history.set(dex, newEntry);
} else {
_history.add(newEntry);
}
}
public void requestFailed (Exception cause) {
// do nothing
}
});
return ChatCodes.SUCCESS;
}
/**
* Parse the tell into two strings, handle and message. If either one is null then the
* parsing did not succeed.
*/
protected String[] parseTell (String args)
{
String handle, message;
if (args.startsWith("\"")) {
int nextQuote = args.indexOf('"', 1);
if (nextQuote == -1 || nextQuote == 1) {
handle = message = null; // bogus parsing
} else {
handle = args.substring(1, nextQuote).trim();
message = args.substring(nextQuote + 1).trim();
}
} else {
StringTokenizer st = new StringTokenizer(args);
handle = st.nextToken();
message = args.substring(handle.length()).trim();
}
return new String[] { handle, message };
}
/**
* Turn the user-entered string into a Name object, doing any particular normalization we
* want to do along the way so that "/tell Bob" and "/tell BoB" don't both show up in
* history.
*/
protected Name normalizeAsName (String handle)
{
return new Name(handle);
}
/**
* Escape or otherwise do any final processing on the message prior to sending it.
*/
protected String escapeMessage (String msg)
{
return msg;
}
}
/** Implements /broadcast. */
protected class BroadcastHandler extends CommandHandler
{
@Override
public String handleCommand (SpeakService speakSvc, String command,
String args, String[] history)
{
if (StringUtil.isBlank(args)) {
return getUsage(command);
}
// mogrify and verify length
args = mogrifyChat(args);
String err = checkLength(args);
if (err != null) {
return err;
}
// request the broadcast
requestBroadcast(args);
// note the command to be stored in the history
history[0] = command + " ";
return ChatCodes.SUCCESS;
}
@Override
public boolean checkAccess (BodyObject user)
{
return user.checkAccess(ChatCodes.BROADCAST_ACCESS) == null;
}
}
/** Our active chat context. */
protected CrowdContext _ctx;
/** Provides access to chat-related server-side services. */
protected ChatService _cservice;
/** The bundle to use for our own internal messages. */
protected String _bundle;
/** The place object that we currently occupy. */
protected PlaceObject _place;
/** The client object that we're listening to for tells. */
protected ClientObject _clobj;
/** Whether or not to run chat through the mogrifier. */
protected boolean _mogrifyChat= true;
/** A list of registered chat displays. */
protected ObserverList _displays = ObserverList.newSafeInOrder();
/** A list of registered chat filters. */
protected ObserverList _filters = ObserverList.newSafeInOrder();
/** A mapping from auxiliary chat objects to the types under which
* they are registered. */
protected HashIntMap _auxes = new HashIntMap();
/** Validator of who may be added to the chatters list. */
protected ChatterValidator _chatterValidator;
/** Usernames of users we've recently chatted with. */
protected LinkedList _chatters = new LinkedList();
/** Observers that are watching our chatters list. */
protected ObserverList _chatterObservers = ObserverList.newSafeInOrder();
/** Operation used to filter chat messages. */
protected FilterMessageOp _filterMessageOp = new FilterMessageOp();
/** Operation used to display chat messages. */
protected DisplayMessageOp _displayMessageOp = new DisplayMessageOp();
/** A rolling chat history, or null if {@link #getHistory} is never called. */
protected HistoryList _hlist;
/** Registered chat command handlers. */
protected static HashMap _handlers = Maps.newHashMap();
/** A history of chat commands. */
protected static ArrayList _history = Lists.newArrayList();
/** If set, only show the first alias (translation) of each command in the full list
* and show the full list of aliases in the command usage. */
protected static boolean _showAliasesInUsage;
/** The maximum number of chatter usernames to track. */
protected static final int MAX_CHATTERS = 6;
/** The maximum number of commands to keep in the chat history. */
protected static final int MAX_COMMAND_HISTORY = 10;
}
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