tab completion

common/src/main/java/com/dfsek/terra/commands/structure/RotationCompleter.java

@@ -0,0 +1,14 @@
+package com.dfsek.terra.commands.structure;
+
+import com.dfsek.terra.api.command.tab.TabCompleter;
+import com.dfsek.terra.api.platform.CommandSender;
+
+import java.util.Arrays;
+import java.util.List;
+
+public class RotationCompleter implements TabCompleter {
+    @Override
+    public List<String> complete(CommandSender sender) {
+        return Arrays.asList("0", "90", "180", "270");
+    }
+}

common/src/main/java/com/dfsek/terra/commands/structure/StructureLoadCommand.java

@@ -11,7 +11,8 @@ import com.dfsek.terra.api.command.annotation.Switch;
                 @Argument(
                         value = "rotation",
                         required = false,
-                        type = int.class
+                        type = int.class,
+                        tabCompleter = RotationCompleter.class
                 )
         },
         switches = {