Feature/logging-for-disabled-features (#1048)

* Added Logging for disabled features

Author: Suleman70

application/src/main/java/org/togetherjava/tjbot/config/FeatureBlacklist.java

@@ -1,8 +1,12 @@
 package org.togetherjava.tjbot.config;
 
 import com.fasterxml.jackson.annotation.JsonCreator;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import java.util.Set;
+import java.util.function.Function;
+import java.util.stream.Stream;
 
 /**
  * Blacklist of features, use {@link FeatureBlacklist#isEnabled(T)} to test if a feature is enabled.
@@ -13,6 +17,8 @@
 public class FeatureBlacklist<T> {
     private final Set<T> featureIdentifierBlacklist;
 
+    private static final Logger logger = LoggerFactory.getLogger(FeatureBlacklist.class);
+
     /**
      * Creates a feature blacklist
      * 
@@ -32,4 +38,25 @@ public FeatureBlacklist(Set<T> featureIdentifierBlacklist) {
     public boolean isEnabled(T featureId) {
         return !featureIdentifierBlacklist.contains(featureId);
     }
+
+    /**
+     * Filters features stream to only having enabled features and logs any disabled features.
+     *
+     * @param features the feature stream to be filtered
+     * @param idExtractor function to get the class name of an object
+     * @return stream of features that are enabled
+     */
+    public <F> Stream<F> filterStream(Stream<F> features,
+            Function<? super F, ? extends T> idExtractor) {
+        return features.filter(f -> {
+            T id = idExtractor.apply(f);
+            if (!this.isEnabled(id)) {
+                logger.info("Feature {} is disabled", id);
+                return false;
+            }
+            return true;
+        });
+    }
+
+
 }

application/src/main/java/org/togetherjava/tjbot/features/Features.java

@@ -168,6 +168,6 @@ public static Collection<Feature> createFeatures(JDA jda, Database database, Con
         features.add(new JShellCommand(jshellEval));
 
         FeatureBlacklist<Class<?>> blacklist = blacklistConfig.normal();
-        return features.stream().filter(f -> blacklist.isEnabled(f.getClass())).toList();
+        return blacklist.filterStream(features.stream(), Object::getClass).toList();
     }
 }

application/src/main/java/org/togetherjava/tjbot/features/code/CodeMessageHandler.java

@@ -71,10 +71,10 @@ public final class CodeMessageHandler extends MessageReceiverAdapter implements
     public CodeMessageHandler(FeatureBlacklist<String> blacklist, JShellEval jshellEval) {
         componentIdInteractor = new ComponentIdInteractor(getInteractionType(), getName());
 
-        List<CodeAction> codeActions =
-                Stream.of(new FormatCodeCommand(), new EvalCodeCommand(jshellEval))
-                    .filter(a -> blacklist.isEnabled(a.getClass().getSimpleName()))
-                    .toList();
+        List<CodeAction> codeActions = blacklist
+            .filterStream(Stream.of(new FormatCodeCommand(), new EvalCodeCommand(jshellEval)),
+                    codeAction -> codeAction.getClass().getName())
+            .toList();
 
         labelToCodeAction = codeActions.stream()
             .collect(Collectors.toMap(CodeAction::getLabel, Function.identity(), (x, y) -> y,