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Java wrapper for the popular chat & VOIP service: Discord https://discord.com
/*
* Copyright 2015 Austin Keener, Michael Ritter, Florian Spieß, and the JDA contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.dv8tion.jda.internal.handle;
import net.dv8tion.jda.api.entities.Guild;
import net.dv8tion.jda.api.entities.MessageReaction;
import net.dv8tion.jda.api.entities.Role;
import net.dv8tion.jda.api.entities.User;
import net.dv8tion.jda.api.entities.channel.ChannelType;
import net.dv8tion.jda.api.entities.channel.middleman.GuildChannel;
import net.dv8tion.jda.api.entities.channel.middleman.MessageChannel;
import net.dv8tion.jda.api.entities.emoji.EmojiUnion;
import net.dv8tion.jda.api.events.message.react.MessageReactionAddEvent;
import net.dv8tion.jda.api.events.message.react.MessageReactionRemoveEvent;
import net.dv8tion.jda.api.utils.data.DataArray;
import net.dv8tion.jda.api.utils.data.DataObject;
import net.dv8tion.jda.internal.JDAImpl;
import net.dv8tion.jda.internal.entities.EntityBuilder;
import net.dv8tion.jda.internal.entities.GuildImpl;
import net.dv8tion.jda.internal.entities.MemberImpl;
import net.dv8tion.jda.internal.entities.channel.concrete.PrivateChannelImpl;
import net.dv8tion.jda.internal.requests.WebSocketClient;
import net.dv8tion.jda.internal.utils.JDALogger;
import java.util.List;
import java.util.Objects;
import java.util.Optional;
import java.util.stream.Collectors;
public class MessageReactionHandler extends SocketHandler
{
private final boolean add;
public MessageReactionHandler(JDAImpl api, boolean add)
{
super(api);
this.add = add;
}
@Override
protected Long handleInternally(DataObject content)
{
if (!content.isNull("guild_id"))
{
long guildId = content.getLong("guild_id");
if (api.getGuildSetupController().isLocked(guildId))
return guildId;
}
DataObject emoji = content.getObject("emoji");
final long userId = content.getLong("user_id");
final long messageId = content.getLong("message_id");
final long channelId = content.getLong("channel_id");
final Long emojiId = emoji.isNull("id") ? null : emoji.getLong("id");
String emojiName = emoji.getString("name", null);
if (emojiId == null && emojiName == null)
{
WebSocketClient.LOG.debug("Received a reaction {} with no name nor id. json: {}",
JDALogger.getLazyString(() -> add ? "add" : "remove"), content);
return null;
}
final long guildId = content.getUnsignedLong("guild_id", 0);
Guild guild = api.getGuildById(guildId);
MemberImpl member = null;
if (guild != null)
{
member = (MemberImpl) guild.getMemberById(userId);
// Attempt loading the member if possible
Optional memberJson = content.optObject("member");
if (memberJson.isPresent()) // Check if we can load a member here
{
DataObject json = memberJson.get();
if (member == null || !member.hasTimeJoined()) // do we need to load a member?
member = api.getEntityBuilder().createMember((GuildImpl) guild, json);
else // otherwise update the cache
{
List roles = json.getArray("roles")
.stream(DataArray::getUnsignedLong)
.map(guild::getRoleById)
.filter(Objects::nonNull)
.collect(Collectors.toList());
api.getEntityBuilder().updateMember((GuildImpl) guild, member, json, roles);
}
// update internal references
api.getEntityBuilder().updateMemberCache(member);
}
if (member == null && add && guild.isLoaded())
{
WebSocketClient.LOG.debug("Dropping reaction event for unknown member {}", content);
return null;
}
}
User user = api.getUserById(userId);
if (user == null && member != null)
user = member.getUser(); // this happens when we have guild subscriptions disabled
if (user == null)
{
// We expect there to be a user object already cached when we are in a guild and adding a new reaction as the user should be a member cached in the guild.
// The event in the context of a guild will also provide a member object, if the required intents are present.
// The only time we can receive a reaction add but not have the user cached would be if we receive the event in an uncached or partially built PrivateChannel.
if (add && guild != null)
{
api.getEventCache().cache(EventCache.Type.USER, userId, responseNumber, allContent, this::handle);
EventCache.LOG.debug("Received a reaction for a user that JDA does not currently have cached. " +
"UserID: {} ChannelId: {} MessageId: {}", userId, channelId, messageId);
return null;
}
}
MessageChannel channel = api.getChannelById(MessageChannel.class, channelId);
if (channel == null)
{
// If discord adds message support for unexpected types in the future, drop the event instead of caching it
if (guild != null)
{
GuildChannel actual = guild.getGuildChannelById(channelId);
if (actual != null)
{
WebSocketClient.LOG.debug("Dropping MESSAGE_REACTION event for unexpected channel of type {}", actual.getType());
return null;
}
}
if (guildId != 0)
{
api.getEventCache().cache(EventCache.Type.CHANNEL, channelId, responseNumber, allContent, this::handle);
EventCache.LOG.debug("Received a reaction for a channel that JDA does not currently have cached");
return null;
}
//create a new private channel with minimal information for this event
channel = getJDA().getEntityBuilder().createPrivateChannel(
DataObject.empty()
.put("id", channelId)
);
}
// reaction remove has null name sometimes
EmojiUnion rEmoji = EntityBuilder.createEmoji(emoji);
MessageReaction reaction = new MessageReaction(channel, rEmoji, messageId, userId == api.getSelfUser().getIdLong(), -1);
if (channel.getType() == ChannelType.PRIVATE)
{
api.usedPrivateChannel(reaction.getChannel().getIdLong());
PrivateChannelImpl priv = (PrivateChannelImpl) channel;
//try to add the user here if we need to, as we have their ID
if (priv.getUser() == null && user != null)
{
priv.setUser(user);
}
}
if (add)
{
api.handleEvent(
new MessageReactionAddEvent(
api, responseNumber,
user, member, reaction, userId, content.getUnsignedLong("message_author_id", 0L)));
}
else
{
api.handleEvent(
new MessageReactionRemoveEvent(
api, responseNumber,
user, member, reaction, userId));
}
return null;
}
}