Cleanup

core/src/mindustry/world/meta/BuildPlaceability.java

@@ -0,0 +1,32 @@
+package mindustry.world.meta;
+
+import arc.*;
+import arc.func.*;
+import mindustry.*;
+
+import java.util.*;
+
+/**
+ * Like BuildVisiblity, but defines whether a block can be *placed*, with an extra message.
+ * This is like defining a conditionally banned block.
+ * */
+public enum BuildPlaceability{
+    always(() -> true),
+    sectorCaptured(() -> Vars.state.rules.sector != null && Vars.state.rules.sector.isCaptured());
+
+    private final Boolp placeability;
+
+    BuildPlaceability(Boolp placeability){
+        this.placeability = placeability;
+    }
+
+    public boolean placeable(){
+        return placeability.get();
+    }
+
+    /** @return why this block is banned. */
+    public String message(){
+        return Core.bundle.get("unplaceable." + name().toLowerCase(Locale.ROOT));
+    }
+
+}