Add SWCommand multilingual

SpigotCore_Main/src/de/steamwar/command/SWCommand.java

@@ -26,10 +26,10 @@ import org.bukkit.plugin.Plugin;
 import org.bukkit.scheduler.BukkitRunnable;
 
 import java.lang.annotation.*;
-import java.lang.reflect.Method;
-import java.lang.reflect.Parameter;
+import java.lang.reflect.*;
 import java.util.*;
 import java.util.function.BiConsumer;
+import java.util.function.BiFunction;
 import java.util.function.IntPredicate;
 import java.util.logging.Level;
 import java.util.stream.Collectors;
@@ -43,6 +43,8 @@ public abstract class SWCommand {
     private final List<SubCommand> commandHelpList = new ArrayList<>();
     private final Map<String, TypeMapper<?>> localTypeMapper = new HashMap<>();
 
+    private BiFunction<String, CommandSender, String> message = (s, commandSender) -> s;
+
     protected SWCommand(String command) {
         this(command, new String[0]);
     }
@@ -71,6 +73,8 @@ public abstract class SWCommand {
         unregister();
         register();
 
+        messageSystem();
+
         List<Method> methods = methods();
         for (Method method : methods) {
             addMapper(Mapper.class, method, i -> i == 0, false, TypeMapper.class, (anno, typeMapper) -> {
@@ -141,6 +145,26 @@ public abstract class SWCommand {
         }
     }
 
+    private void messageSystem() {
+        try {
+            Field field = getClass().getDeclaredField("MESSAGE");
+            if (!field.getType().getTypeName().equals("de.steamwar.message.Message")) {
+                return;
+            }
+            Object o = Modifier.isStatic(field.getModifiers()) ? field.get(null) : field.get(this);
+            Method method = o.getClass().getMethod("parse");
+            message = (s, commandSender) -> {
+                try {
+                    return (String) method.invoke(o, s, commandSender);
+                } catch (IllegalAccessException | InvocationTargetException e) {
+                    return s;
+                }
+            };
+        } catch (NoSuchFieldException | IllegalAccessException | NoSuchMethodException e) {
+            // Ignored
+        }
+    }
+
     private <T extends Annotation> void add(Class<T> annotation, Method method, IntPredicate parameterTester, boolean firstParameter, Class<?> returnType, BiConsumer<T, Parameter[]> consumer) {
         T[] anno = SWCommandUtils.getAnnotation(method, annotation);
         if (anno == null || anno.length == 0) return;