Add log level configuration (#1156)

* Add loglevel config

* Change order of fields

---------

Co-authored-by: John Grosh <john.a.grosh@gmail.com>

src/main/java/com/jagrosh/jmusicbot/BotConfig.java

@@ -39,7 +39,7 @@ public class BotConfig
     private final static String END_TOKEN = "/// END OF JMUSICBOT CONFIG ///";
 
     private Path path = null;
-    private String token, prefix, altprefix, helpWord, playlistsFolder,
+    private String token, prefix, altprefix, helpWord, playlistsFolder, logLevel,
             successEmoji, warningEmoji, errorEmoji, loadingEmoji, searchingEmoji;
     private boolean stayInChannel, songInGame, npImages, updatealerts, useEval, dbots;
     private long owner, maxSeconds, aloneTimeUntilStop;
@@ -86,6 +86,7 @@ public void load()
             songInGame = config.getBoolean("songinstatus");
             npImages = config.getBoolean("npimages");
             updatealerts = config.getBoolean("updatealerts");
+            logLevel = config.getString("loglevel");
             useEval = config.getBoolean("eval");
             maxSeconds = config.getLong("maxtime");
             aloneTimeUntilStop = config.getLong("alonetimeuntilstop");
@@ -312,7 +313,12 @@ public boolean useUpdateAlerts()
     {
         return updatealerts;
     }
-
+
+    public String getLogLevel()
+    {
+        return logLevel;
+    }
+
     public boolean useEval()
     {
         return useEval;

src/main/java/com/jagrosh/jmusicbot/JMusicBot.java

@@ -38,6 +38,7 @@
 import net.dv8tion.jda.api.exceptions.ErrorResponseException;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import ch.qos.logback.classic.Level;
 
 /**
  *
@@ -82,6 +83,10 @@ private static void startBot()
         if(!config.isValid())
             return;
         LOG.info("Loaded config from " + config.getConfigLocation());
+
+        // set log level from config
+        ((ch.qos.logback.classic.Logger) LoggerFactory.getLogger(Logger.ROOT_LOGGER_NAME)).setLevel(
+                Level.toLevel(config.getLogLevel(), Level.INFO));
 
         // set up the listener
         EventWaiter waiter = new EventWaiter();

src/main/resources/reference.conf

@@ -182,6 +182,15 @@ aliases {
 }
 
 
+// This sets the logging verbosity.
+// Available levels: off, error, warn, info, debug, trace, all
+//
+// It is recommended to leave this at info. Debug log levels might help with troubleshooting,
+// but can contain sensitive data.
+
+loglevel = info
+
+
 // Transforms are used to modify specific play inputs and convert them to different kinds of inputs
 // These are quite complicated to use, and have limited use-cases, but in theory allow for rough
 // whitelists or blacklists, roundabout loading from some sources, and customization of how things are