better handle issues of no permission

Author: Revxrsal

common/src/main/java/revxrsal/commands/node/DefaultFailureHandler.java

@@ -5,10 +5,13 @@
 import revxrsal.commands.Lamp;
 import revxrsal.commands.command.CommandActor;
 import revxrsal.commands.command.Potential;
+import revxrsal.commands.exception.NoPermissionException;
 import revxrsal.commands.stream.StringStream;
 
 import java.util.List;
 
+import static revxrsal.commands.util.Collections.any;
+
 /**
  * The default failure handler. This can be overridden in {@link DispatcherSettings}
  * from {@link Lamp.Builder#dispatcherSettings()}.
@@ -29,10 +32,17 @@ public static <A extends CommandActor> FailureHandler<A> defaultFailureHandler()
 
     @Override
     public void handleFailedAttempts(@NotNull A actor, @NotNull @Unmodifiable List<Potential<A>> failedAttempts, @NotNull StringStream input) {
+        if (failedAttempts.isEmpty()) {
+            return;
+        }
         if (failedAttempts.size() == 1) {
             failedAttempts.get(0).handleException();
             return;
         }
+        if (failedAttempts.get(0).error() instanceof NoPermissionException) {
+            failedAttempts.get(0).handleException();
+            return;
+        }
         actor.error("Failed to find a suitable command for your input (\"" + input.source() + "\"). Did you mean:");
         for (int i = 0; i < failedAttempts.size(); i++) {
             if (i >= MAX_NUMBER_OF_SUGGESTIONS)
@@ -41,4 +51,4 @@ public void handleFailedAttempts(@NotNull A actor, @NotNull @Unmodifiable List<P
             actor.reply("- " + failedAttempt.context().command().path());
         }
     }
-}
+}