feat: server commands added

megamek/src/megamek/client/ui/swing/gmCommands/GamemasterCommandPanel.java

@@ -102,7 +102,7 @@ private JComboBox<String> createOptionalEnumComboBox(OptionalEnumArgument<?> enu
             comboBox.setSelectedItem("-");
         }
         for (var arg : enumArg.getEnumType().getEnumConstants()) {
-            comboBox.addItem(arg.ordinal() + ": " + arg.toString());
+            comboBox.addItem(arg.ordinal() + ": " + arg);
         }
         if (enumArg.getValue() != null) {
             comboBox.setSelectedItem(enumArg.getValue().ordinal() + ": " + enumArg.getValue().toString());

megamek/src/megamek/server/commands/GamemasterServerCommand.java

@@ -148,7 +148,7 @@ public String getHelpHtml() {
             this.getHelp()
                 .replaceAll("<", "&lt;")
                 .replaceAll(">", "&gt;")
-                .replaceAll("   ", "| ")
+                .replaceAll(LONG_WHITESPACE, "| ")
                 .replaceAll(NEWLINE, "<br>")+
             "</html>";
     }

megamek/src/megamek/server/commands/arguments/OptionalEnumArgument.java

@@ -0,0 +1,52 @@
+package megamek.server.commands.arguments;
+
+import megamek.client.ui.Messages;
+
+import java.util.Arrays;
+
+public class OptionalEnumArgument<E extends Enum<E>> extends EnumArgument<E> {
+
+    public OptionalEnumArgument(String name, String description, Class<E> enumType) {
+        super(name, description, enumType, null);
+    }
+
+    @Override
+    public void parse(String input) throws IllegalArgumentException {
+        if (input == null) {
+            return;
+        }
+        try {
+            value = enumType.getEnumConstants()[Integer.parseInt(input)];
+        } catch (IllegalArgumentException e) {
+            throw new IllegalArgumentException(getName() + " must be one of: " + getEnumConstantsString());
+        }
+    }
+
+    public boolean isPresent() {
+        return value != null;
+    }
+
+    public boolean isEmpty() {
+        return value == null;
+    }
+
+    private String getEnumConstantsString() {
+        var sb = new StringBuilder();
+        for (int i = 0; i < enumType.getEnumConstants().length; i++) {
+            sb.append(i).append(": ").append(enumType.getEnumConstants()[i]);
+            if (i < enumType.getEnumConstants().length - 1) {
+                sb.append(", ");
+            }
+        }
+        return sb.toString();
+    }
+
+    @Override
+    public String getHelp() {
+        return getDescription() +
+            " [" + getEnumConstantsString() + "] " +
+            (defaultValue != null ? " [default: " + defaultValue + "]. " : ". ") +
+            Messages.getString("Gamemaster.cmd.params.optional");
+    }
+
+}