Java tutorial
/* * MIT License * * Copyright (c) 2016 Frederik Ar. Mikkelsen * * 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 fredboat.command.music.control; import com.sedmelluq.discord.lavaplayer.track.AudioTrack; import fredboat.audio.GuildPlayer; import fredboat.audio.PlayerRegistry; import fredboat.audio.queue.AudioTrackContext; import fredboat.commandmeta.abs.Command; import fredboat.commandmeta.abs.IMusicCommand; import net.dv8tion.jda.core.entities.Guild; import net.dv8tion.jda.core.entities.Member; import net.dv8tion.jda.core.entities.Message; import net.dv8tion.jda.core.entities.TextChannel; import org.apache.commons.lang3.StringUtils; public class SkipCommand extends Command implements IMusicCommand { @Override public void onInvoke(Guild guild, TextChannel channel, Member invoker, Message message, String[] args) { GuildPlayer player = PlayerRegistry.get(guild); player.setCurrentTC(channel); if (player.isQueueEmpty()) { channel.sendMessage("The queue is empty!").queue(); } if (args.length == 1) { skipNext(guild, channel, invoker, message, args); } else if (args.length == 2 && StringUtils.isNumeric(args[1])) { int givenIndex = Integer.parseInt(args[1]); if (givenIndex == 1) { skipNext(guild, channel, invoker, message, args); return; } if (player.getRemainingTracks().size() < givenIndex) { channel.sendMessage("Can't remove track number " + givenIndex + " when there are only " + player.getRemainingTracks().size() + " tracks.").queue(); return; } else if (givenIndex < 1) { channel.sendMessage("Given number must be greater than 0.").queue(); return; } AudioTrackContext atc = player.getAudioTrackProvider().removeAt(givenIndex - 2); channel.sendMessage("Skipped track #" + givenIndex + ": **" + atc.getTrack().getInfo().title + "**") .queue(); } else { channel.sendMessage("Incorrect number of arguments. Proper usage: ```\n;;skip\n;;skip <index>```") .queue(); } } private void skipNext(Guild guild, TextChannel channel, Member invoker, Message message, String[] args) { GuildPlayer player = PlayerRegistry.get(guild); AudioTrackContext atc = player.getPlayingTrack(); player.skip(); if (atc == null) { channel.sendMessage("Couldn't find track to skip.").queue(); } else { channel.sendMessage("Skipped track #1: **" + atc.getTrack().getInfo().title + "**").queue(); } } }