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

@@ -34,6 +34,9 @@ import java.util.stream.Collectors;
 
 public abstract class SWCommand {
 
+    private boolean hasHelp = false;
+    private final List<String> help = new ArrayList<>();
+
     private final Command command;
     private final List<SubCommand> commandList = new ArrayList<>();
     private final List<SubCommand> commandHelpList = new ArrayList<>();
@@ -87,6 +90,14 @@ public abstract class SWCommand {
                     Bukkit.getLogger().log(Level.WARNING, "The method '" + method.toString() + "' is lacking the varArgs parameters of type '" + String.class.getTypeName() + "' as last Argument");
                     return;
                 }
+                if (method.getName().equals("internalHelp") && method.getDeclaringClass() == SWCommand.class) {
+                    if (hasHelp) {
+                        return;
+                    }
+                } else if (!hasHelp) {
+                    commandHelpList.clear();
+                    hasHelp = true;
+                }
                 commandHelpList.add(new SubCommand(this, method, anno.value(), new HashMap<>()));
             });
         }
@@ -166,6 +177,36 @@ public abstract class SWCommand {
         SWCommandUtils.commandMap.register("steamwar", this.command);
     }
 
+    @Register
+    private void internalHelp(CommandSender sender, String... args){
+        if (help.isEmpty()) {
+            commandList.forEach(subCommand -> {
+                StringBuilder st = new StringBuilder();
+                st.append("§8/§7").append(command.getName()).append(" ");
+                st.append("§7").append(String.join(" ", subCommand.subCommand)).append(" ");
+                int i = 1;
+                while (i < subCommand.parameters.length) {
+                    Parameter parameter = subCommand.parameters[i];
+                    Name name = parameter.getAnnotation(Name.class);
+                    st.append("§8[§7");
+                    if (name != null) {
+                        st.append(name.name());
+                    } else {
+                        st.append(parameter.getName());
+                    }
+                    st.append("§8]");
+                    i++;
+                }
+                if (subCommand.varArgType != null) {
+                    st.append("§7...");
+                }
+                help.add(st.toString());
+            });
+        }
+        sender.sendMessage("§7Help§8: §e" + command.getName());
+        help.forEach(sender::sendMessage);
+    }
+
     @Retention(RetentionPolicy.RUNTIME)
     @Target({ElementType.METHOD})
     @Repeatable(Register.Registeres.class)
@@ -196,4 +237,10 @@ public abstract class SWCommand {
 
         boolean local() default false;
     }
+
+    @Retention(RetentionPolicy.RUNTIME)
+    @Target({ElementType.PARAMETER})
+    protected @interface Name {
+        String name();
+    }
 }

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

@@ -34,6 +34,7 @@ class SubCommand {
 
     private SWCommand swCommand;
     private Method method;
+    Parameter[] parameters;
     String[] subCommand;
     TypeMapper<?>[] arguments;
     private Predicate<CommandSender> commandSenderPredicate;
@@ -44,7 +45,7 @@ class SubCommand {
         this.swCommand = swCommand;
         this.method = method;
 
-        Parameter[] parameters = method.getParameters();
+        parameters = method.getParameters();
         commandSenderPredicate = sender -> parameters[0].getType().isAssignableFrom(sender.getClass());
         commandSenderFunction = sender -> parameters[0].getType().cast(sender);
         this.subCommand = subCommand;