#857 Create event for failed authentication

src/main/java/fr/xephi/authme/service/BukkitService.java

@@ -25,6 +25,7 @@ import java.util.Collection;
 import java.util.Collections;
 import java.util.Date;
 import java.util.Set;
+import java.util.function.Function;
 
 /**
  * Service for operations requiring the Bukkit API, such as for scheduling.
@@ -263,6 +264,20 @@ public class BukkitService implements SettingsDependent {
         Bukkit.getPluginManager().callEvent(event);
     }
 
+    /**
+     * Creates an event with the provided function and emits it.
+     *
+     * @param eventSupplier the event supplier: function taking a boolean specifying whether AuthMe is configured
+     *                      in async mode or not
+     * @param <E> the event type
+     * @return the event that was created and emitted
+     */
+    public <E extends Event> E createAndCallEvent(Function<Boolean, E> eventSupplier) {
+        E event = eventSupplier.apply(useAsyncTasks);
+        callEvent(event);
+        return event;
+    }
+
     /**
      * Gets the world with the given name.
      *