Fix music playback

Author: duncte123

bot/build.gradle.kts

@@ -36,7 +36,7 @@ plugins {
 
 val pmdVersion = "7.0.0-rc4"
 
-val numberVersion = "3.109.1"
+val numberVersion = "3.109.2"
 
 project.group = "me.duncte123.skybot"
 project.version = "${numberVersion}_${getGitHash()}"

bot/src/main/java/fredboat/audio/player/LavalinkManager.java

@@ -105,7 +105,17 @@ public boolean isConnected(Guild guild) {
     }
 
     public boolean isConnected(long guildId) {
-        return !isEnabled() || lavalink.getLink(guildId).getState() == LinkState.CONNECTED;
+        if (!isEnabled()) {
+            return false;
+        }
+
+        final var link = lavalink.getLinkIfCached(guildId);
+
+        if (link == null) {
+            return false;
+        }
+
+        return link.getState() == LinkState.CONNECTED;
     }
 
     @SuppressWarnings("ConstantConditions") // cache is enabled

bot/src/main/java/me/duncte123/skybot/audio/GuildMusicManager.java

@@ -27,6 +27,7 @@
 import net.dv8tion.jda.api.entities.channel.middleman.MessageChannel;
 
 import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
 import java.util.Optional;
 import java.util.concurrent.atomic.AtomicLong;
 import java.util.function.Supplier;
@@ -81,14 +82,19 @@ public Optional<MessageChannel> getLatestChannel() {
         );
     }
 
+    @Nullable
     public Link getLink() {
-        return LavalinkManager.INS.getLavalink().getLink(this.guildId);
+        return LavalinkManager.INS.getLavalink().getLinkIfCached(this.guildId);
     }
 
     public Optional<LavalinkPlayer> getPlayer() {
-        return Optional.ofNullable(
-            this.getLink().getCachedPlayer()
-        );
+        final var link = this.getLink();
+
+        if (link == null) {
+            return Optional.empty();
+        }
+
+        return Optional.ofNullable(link.getCachedPlayer());
     }
 
     public long getGuildId() {

bot/src/main/kotlin/me/duncte123/skybot/commands/music/LyricsCommand.kt

@@ -70,7 +70,7 @@ class LyricsCommand : MusicCommand() {
             return
         }
 
-        loadLyricsFromLavalink(mng.link) {
+        loadLyricsFromLavalink(mng.link!!) {
             if (it == null) {
                 sendMsg(ctx, "There where no lyrics found for `${playingTrack.info.title}`")
                 return@loadLyricsFromLavalink
@@ -106,7 +106,7 @@ class LyricsCommand : MusicCommand() {
 
             event.deferReply().queue()
 
-            loadLyricsFromLavalink(mng.link) {
+            loadLyricsFromLavalink(mng.link!!) {
                 if (it == null) {
                     event.hook.sendMessage("There where no lyrics found for `${playingTrack.info.title}`")
                         .queue()

bot/src/main/kotlin/me/duncte123/skybot/commands/music/PlayCommand.kt

@@ -170,6 +170,11 @@ open class PlayCommand(private val skipParsing: Boolean = false) : MusicCommand(
     }
 
     override fun handleEvent(event: SlashCommandInteractionEvent, variables: Variables) {
+        if (!event.member!!.voiceState!!.inAudioChannel()) {
+            event.reply("Auto-join is not yet supported for slash commands. Sorry about that").queue()
+            return
+        }
+
         var toPlay = event.getOption("item")!!.asString
 
         if (toPlay.contains(pornhubRegex.toRegex()) && !event.channel.isNSFW) {

bot/src/main/kotlin/me/duncte123/skybot/objects/AudioData.kt

@@ -20,7 +20,7 @@ package me.duncte123.skybot.objects
 
 import me.duncte123.skybot.Variables
 import net.dv8tion.jda.api.JDA
-import net.dv8tion.jda.api.entities.channel.unions.MessageChannelUnion
+import net.dv8tion.jda.api.entities.channel.middleman.MessageChannel
 import net.dv8tion.jda.api.events.interaction.command.SlashCommandInteractionEvent
 
 data class AudioData(
@@ -31,7 +31,8 @@ data class AudioData(
     val jda: JDA,
     val variables: Variables,
 ) {
-    fun getChannel() = jda.getChannelById(MessageChannelUnion::class.java, channelId)!!
+    val channel: MessageChannel
+        get() = jda.getChannelById(MessageChannel::class.java, channelId)!!
 
     companion object {
         fun fromSlash(event: SlashCommandInteractionEvent, variables: Variables): AudioData = AudioData(