Feature/clear on empty

FredBoat/src/main/java/fredboat/command/config/ConfigCommand.kt

@@ -58,6 +58,7 @@ class ConfigCommand(name: String, vararg aliases: String) : Command(name, *alias
                 .append(context.i18nFormat("configNoArgs", context.guild.name)).append("\n")
                 .append("track_announce = ${gc.isTrackAnnounce}\n")
                 .append("auto_resume = ${gc.isAutoResume}\n")
+                .append("clear_on_empty = ${gc.isClearOnEmpty}")
                 .append("```") //opening ``` is part of the configNoArgs language string
 
         context.reply(mb.build())
@@ -94,6 +95,13 @@ class ConfigCommand(name: String, vararg aliases: String) : Command(name, *alias
             } else {
                 context.reply(context.i18nFormat("configMustBeBoolean", invoker.effectiveName.escapeAndDefuse()))
             }
+        } else if (key == "clear_on_empty") {
+            if (`val`.equals("true", ignoreCase = true) or `val`.equals("false", ignoreCase = true)) {
+                Launcher.botController.guildConfigService.transformGuildConfig(context.guild.id) {
+                    gc -> gc.setClearOnEmpty(java.lang.Boolean.parseBoolean(`val`))
+                }
+                context.replyWithName("`clear_on_empty`" + context.i18nFormat("configSetTo", `val`))
+            }
         } else context.reply(context.i18nFormat("configUnknownKey", invoker.effectiveName.escapeAndDefuse()))
     }
 

FredBoat/src/main/java/fredboat/db/transfer/GuildConfig.java

@@ -35,6 +35,7 @@ public class GuildConfig implements TransferObject<String> {
     private String guildId = "";
     private boolean trackAnnounce = false;
     private boolean autoResume = false;
+    private boolean clearOnEmpty = true;
     private String lang = "en_US";
 
     @Override
@@ -65,6 +66,15 @@ public GuildConfig setAutoResume(boolean autoplay) {
         return this;
     }
 
+    public boolean isClearOnEmpty() {
+        return clearOnEmpty;
+    }
+
+    public GuildConfig setClearOnEmpty(boolean clearOnEmpty) {
+        this.clearOnEmpty = clearOnEmpty;
+        return this;
+    }
+
     public String getLang() {
         return lang;
     }

FredBoat/src/main/java/fredboat/event/AudioEventHandler.kt

@@ -25,14 +25,18 @@ class AudioEventHandler(
     }
 
     override fun onVoiceLeave(channel: VoiceChannel, member: Member) {
-        checkForAutoPause(channel)
+        if (!checkForAutoStop(channel))
+            checkForAutoPause(channel)
+
         if (!member.isUs) return
         getLink(channel).onDisconnected()
     }
 
     override fun onVoiceMove(oldChannel: VoiceChannel, newChannel: VoiceChannel, member: Member) {
         checkForAutoResume(newChannel, member)
-        checkForAutoPause(oldChannel)
+        if (!checkForAutoStop(newChannel))
+            checkForAutoPause(oldChannel)
+
         if (!member.isUs) return
         getLink(newChannel).setChannel(newChannel.id.toString())
     }
@@ -77,4 +81,25 @@ class AudioEventHandler(
         }
     }
 
+    /**
+     * Check if the player should be stopped, if yes it will stop the player and return true
+     * else returns false
+     *
+     * @return Boolean if player has been stopped
+     **/
+    private fun checkForAutoStop(channel: VoiceChannel): Boolean {
+        val player = playerRegistry.getExisting(channel.guild) ?: return false
+
+        if (!player.isQueueEmpty
+                && player.humanUsersInCurrentVC.isEmpty()
+                && guildConfigService.fetchGuildConfig(channel.guild.id).isClearOnEmpty) {
+            player.stop()
+            player.activeTextChannel?.send(I18n.get(channel.guild).getString("eventAutoStop"))?.subscribe()
+
+            return true
+        }
+
+        return false
+    }
+
 }

FredBoat/src/main/resources/lang/en_US.properties

@@ -211,6 +211,7 @@ userinfoBlacklisted=Blacklisted\:
 skipDeniedTooManyTracks=You can't skip someone else's tracks if you are not a DJ.\nConsider using the Voteskip command.
 eventUsersLeftVC=All users have left the voice channel. The player has been paused.
 eventAutoResumed=User presence detected, automatically resuming the player.
+eventAutoStop=All user have left the voice channel. The player has been cleared.
 commandsFun=Fun
 commandsMemes=Memes
 commandsUtility=Utility