Add back logback filter

src/main/java/com/jagrosh/jmusicbot/utils/LogBackTurboFilter.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2024 John Grosh <john.a.grosh@gmail.com>.
+ *
+ * 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 com.jagrosh.jmusicbot.utils;
+
+import ch.qos.logback.classic.Level;
+import ch.qos.logback.classic.Logger;
+import ch.qos.logback.classic.turbo.TurboFilter;
+import ch.qos.logback.core.spi.FilterReply;
+import org.slf4j.Marker;
+
+/**
+ * A TurboFilter, currently only used to suppress specific log messages from libraries.
+ *
+ * @author Michaili K. <git@michaili.dev>
+ */
+public class LogBackTurboFilter extends TurboFilter 
+{
+    @Override
+    public FilterReply decide(Marker marker, Logger logger, Level level, String format, Object[] params, Throwable t) 
+    {
+        // Suppresses the auth token warning from the YoutubeAudioSourceManager
+        // https://github.com/jagrosh/MusicBot/pull/1490#issuecomment-1974070225
+        if (logger.getName().equals("com.sedmelluq.discord.lavaplayer.source.youtube.YoutubeAccessTokenTracker")
+                && format.equals("YouTube auth tokens can't be retrieved because email and password is not set in YoutubeAudioSourceManager, age restricted videos will throw exceptions.")
+        ) {
+            return FilterReply.DENY;
+        }
+
+        return FilterReply.NEUTRAL;
+    }
+}

src/main/resources/logback.xml

@@ -14,4 +14,6 @@
         <appender-ref ref="Simple"/>
     </root>
 
+    <turboFilter class="com.jagrosh.jmusicbot.utils.LogBackTurboFilter" />
+
 </configuration>