🎨 change creative tab format in preparation for porting

Signed-off-by: LocusAzzurro <[email protected]>

src/main/java/com/voxelutopia/ultramarine/data/CreativeTabs.java → src/main/java/com/voxelutopia/ultramarine/data/CreativeTabDefinitions.java

@@ -5,7 +5,7 @@
 import net.minecraft.world.item.CreativeModeTab;
 import net.minecraft.world.item.ItemStack;
 
-public class CreativeTabs {
+public class CreativeTabDefinitions {
 
     public static final CreativeModeTab MATERIALS = new CreativeModeTab(Ultramarine.MOD_ID + ".materials") {
         @Override public ItemStack makeIcon() {

src/main/java/com/voxelutopia/ultramarine/data/ModCreativeTab.java

@@ -0,0 +1,44 @@
+package com.voxelutopia.ultramarine.data;
+
+import net.minecraft.world.item.CreativeModeTab;
+import net.minecraft.world.item.Item;
+import net.minecraftforge.registries.RegistryObject;
+
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+public enum ModCreativeTab {
+    MATERIALS(CreativeTabDefinitions.MATERIALS),
+    TOOLS(CreativeTabDefinitions.TOOLS),
+    BUILDING_BLOCKS(CreativeTabDefinitions.BUILDING_BLOCKS),
+    DECORATIVE_BLOCKS(CreativeTabDefinitions.DECORATIVE_BLOCKS),
+    DECORATIONS(CreativeTabDefinitions.DECORATIONS),
+    FURNITURE(CreativeTabDefinitions.FURNITURE),
+    WINDOWS_AND_DOORS(CreativeTabDefinitions.WINDOWS_AND_DOORS),
+    LAMPS(CreativeTabDefinitions.LAMPS);
+
+    final CreativeModeTab tab;
+
+    static final Map<ModCreativeTab, Set<RegistryObject<Item>>> itemSets = Map.of(
+            MATERIALS, new HashSet<>(),
+            TOOLS, new HashSet<>(),
+            BUILDING_BLOCKS, new HashSet<>(),
+            DECORATIVE_BLOCKS, new HashSet<>(),
+            DECORATIONS, new HashSet<>(),
+            FURNITURE, new HashSet<>(),
+            WINDOWS_AND_DOORS, new HashSet<>(),
+            LAMPS, new HashSet<>()
+    );
+    ModCreativeTab(CreativeModeTab tab){
+        this.tab = tab;
+    }
+
+    public CreativeModeTab getTab() {
+        return tab;
+    }
+
+    public static void putItemInSet(RegistryObject<Item> item, ModCreativeTab tab){
+        itemSets.get(tab).add(item);
+    }
+}