/*
* This file is part of LanternServer, licensed under the MIT License (MIT).
*
* Copyright (c) LanternPowered <https://www.lanternpowered.org>
* Copyright (c) SpongePowered <https://www.spongepowered.org>
* Copyright (c) contributors
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the Software), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package org.lanternpowered.server.network.vanilla.message.handler.play;
import static org.lanternpowered.server.text.translation.TranslationHelper.t;
import static org.spongepowered.api.command.CommandMessageFormatting.error;
import io.netty.util.Attribute;
import io.netty.util.AttributeKey;
import org.apache.commons.lang3.StringUtils;
import org.lanternpowered.server.entity.living.player.LanternPlayer;
import org.lanternpowered.server.game.Lantern;
import org.lanternpowered.server.network.NetworkContext;
import org.lanternpowered.server.network.message.handler.Handler;
import org.lanternpowered.server.network.NetworkSession;
import org.lanternpowered.server.network.vanilla.message.type.play.MessagePlayInChatMessage;
import org.lanternpowered.server.text.TextConstants;
import org.lanternpowered.server.text.action.LanternClickActionCallbacks;
import org.spongepowered.api.Sponge;
import org.spongepowered.api.command.CommandSource;
import org.spongepowered.api.event.SpongeEventFactory;
import org.spongepowered.api.event.cause.Cause;
import org.spongepowered.api.event.cause.NamedCause;
import org.spongepowered.api.event.message.MessageChannelEvent;
import org.spongepowered.api.event.message.MessageEvent;
import org.spongepowered.api.text.Text;
import org.spongepowered.api.text.action.TextActions;
import org.spongepowered.api.text.channel.MessageChannel;
import org.spongepowered.api.text.chat.ChatTypes;
import org.spongepowered.api.text.format.TextColors;
import org.spongepowered.api.text.format.TextStyles;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.Optional;
import java.util.UUID;
import java.util.function.Consumer;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public final class HandlerPlayInChatMessage implements Handler<MessagePlayInChatMessage> {
private final static AttributeKey<Long> LAST_CHAT_TIME = AttributeKey.valueOf("last-chat-time");
@Override
public void handle(NetworkContext context, MessagePlayInChatMessage message) {
final NetworkSession session = context.getSession();
final LanternPlayer player = session.getPlayer();
player.resetIdleTimeoutCounter();
final String message0 = message.getMessage();
// Check for a valid click action callback
Matcher matcher = LanternClickActionCallbacks.COMMAND_PATTERN.matcher(message0);
if (matcher.matches()) {
UUID uniqueId = UUID.fromString(matcher.group(1));
Optional<Consumer<CommandSource>> callback = LanternClickActionCallbacks.getInstance().getCallbackForUUID(uniqueId);
if (callback.isPresent()) {
callback.get().accept(player);
} else {
player.sendMessage(error(t("The callback you provided was not valid. Keep in mind that callbacks will expire "
+ "after 10 minutes, so you might want to consider clicking faster next time!")));
}
return;
}
String message1 = StringUtils.normalizeSpace(message0);
if (!isAllowedString(message0)) {
session.disconnect(t("disconnect.invalidChatCharacters"));
return;
}
if (message1.startsWith("/")) {
Lantern.getSyncExecutorService().submit(() -> Sponge.getCommandManager().process(player, message1.substring(1)));
} else {
Text nameText = Text.of(player.getName()); // TODO: player.getDisplayNameData().displayName().get();
Text rawMessageText = Text.of(message0);
Text messageText = newTextWithLinks(message0, true);
MessageChannel channel = player.getMessageChannel();
MessageChannelEvent.Chat event = SpongeEventFactory.createMessageChannelEventChat(Cause.of(NamedCause.source(player)),
channel, Optional.of(channel), new MessageEvent.MessageFormatter(nameText, messageText), rawMessageText, false);
if (!Sponge.getEventManager().post(event) && !event.isMessageCancelled()) {
event.getChannel().ifPresent(c -> c.send(player, event.getMessage(), ChatTypes.CHAT));
}
}
Attribute<Long> attr = context.getChannel().attr(LAST_CHAT_TIME);
long currentTime = System.currentTimeMillis();
Long lastTime = attr.getAndSet(currentTime);
if (lastTime != null && currentTime - lastTime < Lantern.getGame().getGlobalConfig().getChatSpamThreshold()) {
session.disconnect(t("disconnect.spam"));
}
}
private static final Pattern URL_PATTERN = Pattern.compile(
"((?:[a-z0-9]{2,}://)?(?:(?:[0-9]{1,3}\\.){3}[0-9]{1,3}|(?:[-\\w_]+\\.[a-z]{2,}?))(?::[0-9]{1,5})?.*?(?=[!\"\u00A7 \n]|$))",
Pattern.CASE_INSENSITIVE);
private static Text newTextWithLinks(String message, boolean allowMissingHeader) {
Text.Builder builder = null;
StringBuilder lastMessage = null;
Matcher matcher = URL_PATTERN.matcher(message);
int lastEnd = 0;
while (matcher.find()) {
int start = matcher.start();
int end = matcher.end();
String part = message.substring(lastEnd, start);
if (part.length() > 0) {
if (lastMessage != null) {
lastMessage.append(part);
} else {
lastMessage = new StringBuilder(part);
}
}
lastEnd = end;
String url = message.substring(start, end);
URL urlInstance = null;
try {
URI uri = new URI(url);
if (uri.getScheme() == null) {
if (!allowMissingHeader) {
uri = null;
} else {
uri = new URI("http://" + url);
}
}
if (uri != null) {
urlInstance = uri.toURL();
}
} catch (URISyntaxException | MalformedURLException ignored) {
}
if (urlInstance == null) {
if (lastMessage != null) {
lastMessage.append(url);
} else {
lastMessage = new StringBuilder(url);
}
} else {
if (builder == null) {
builder = Text.builder();
}
if (lastMessage != null) {
builder.append(Text.of(lastMessage.toString()));
lastMessage = null;
}
builder.append(Text.builder(url)
.onClick(TextActions.openUrl(urlInstance))
.color(TextColors.BLUE)
.style(TextStyles.UNDERLINE)
.build());
}
}
if (builder == null) {
return Text.of(message);
} else {
if (lastMessage != null) {
builder.append(Text.of(lastMessage.toString()));
}
String end = message.substring(lastEnd);
if (end.length() > 0) {
builder.append(Text.of(message.substring(lastEnd)));
}
return builder.build();
}
}
private static boolean isAllowedString(String string) {
for (char character : string.toCharArray()) {
if (!isAllowedCharacter(character)) {
return false;
}
}
return true;
}
private static boolean isAllowedCharacter(char character) {
return character != TextConstants.LEGACY_CHAR && character >= ' ' && character != '\u007F';
}
}