Java tutorial
/* * Copyright 2015-2017 Austin Keener & Michael Ritter & Florian Spie * * 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.core.handle; import net.dv8tion.jda.core.entities.Role; import net.dv8tion.jda.core.entities.impl.GuildImpl; import net.dv8tion.jda.core.entities.impl.JDAImpl; import net.dv8tion.jda.core.entities.impl.MemberImpl; import net.dv8tion.jda.core.events.guild.member.GuildMemberNickChangeEvent; import net.dv8tion.jda.core.events.guild.member.GuildMemberRoleAddEvent; import net.dv8tion.jda.core.events.guild.member.GuildMemberRoleRemoveEvent; import org.json.JSONArray; import org.json.JSONObject; import java.util.*; public class GuildMemberUpdateHandler extends SocketHandler { public GuildMemberUpdateHandler(JDAImpl api) { super(api); } @Override protected Long handleInternally(JSONObject content) { final long id = content.getLong("guild_id"); if (api.getGuildLock().isLocked(id)) return id; JSONObject userJson = content.getJSONObject("user"); final long userId = userJson.getLong("id"); GuildImpl guild = (GuildImpl) api.getGuildMap().get(id); if (guild == null) { api.getEventCache().cache(EventCache.Type.GUILD, userId, () -> { handle(responseNumber, allContent); }); EventCache.LOG.debug("Got GuildMember update but JDA currently does not have the Guild cached. " + content.toString()); return null; } MemberImpl member = (MemberImpl) guild.getMembersMap().get(userId); if (member == null) { api.getEventCache().cache(EventCache.Type.USER, userId, () -> { handle(responseNumber, allContent); }); EventCache.LOG.debug( "Got GuildMember update but Member is not currently present in Guild. " + content.toString()); return null; } Set<Role> currentRoles = member.getRoleSet(); List<Role> newRoles = toRolesList(guild, content.getJSONArray("roles")); //If newRoles is null that means that we didn't find a role that was in the array and was cached this event if (newRoles == null) return null; //Find the roles removed. List<Role> removedRoles = new LinkedList<>(); each: for (Role role : currentRoles) { for (Iterator<Role> it = newRoles.iterator(); it.hasNext();) { Role r = it.next(); if (role.equals(r)) { it.remove(); continue each; } } removedRoles.add(role); } if (removedRoles.size() > 0) currentRoles.removeAll(removedRoles); if (newRoles.size() > 0) currentRoles.addAll(newRoles); if (removedRoles.size() > 0) { api.getEventManager() .handle(new GuildMemberRoleRemoveEvent(api, responseNumber, guild, member, removedRoles)); } if (newRoles.size() > 0) { api.getEventManager().handle(new GuildMemberRoleAddEvent(api, responseNumber, guild, member, newRoles)); } if (content.has("nick")) { String prevNick = member.getNickname(); String newNick = content.isNull("nick") ? null : content.getString("nick"); if (!Objects.equals(prevNick, newNick)) { member.setNickname(newNick); api.getEventManager().handle( new GuildMemberNickChangeEvent(api, responseNumber, guild, member, prevNick, newNick)); } } return null; } private List<Role> toRolesList(GuildImpl guild, JSONArray array) { LinkedList<Role> roles = new LinkedList<>(); for (int i = 0; i < array.length(); i++) { final long id = array.getLong(i); Role r = guild.getRolesMap().get(id); if (r != null) { roles.add(r); } else { api.getEventCache().cache(EventCache.Type.ROLE, id, () -> { handle(responseNumber, allContent); }); EventCache.LOG .debug("Got GuildMember update but one of the Roles for the Member is not yet cached."); return null; } } return roles; } }