ConstructionWand/src/main/java/thetadev/constructionwand/basics/ReplacementRegistry.java

package thetadev.constructionwand.basics;

import net.minecraft.resources.ResourceLocation;
import net.minecraft.world.item.Item;
import net.minecraft.world.item.Items;
import net.minecraft.world.level.block.Block;
import net.minecraft.world.level.block.Blocks;
import net.minecraftforge.registries.ForgeRegistries;
import thetadev.constructionwand.ConstructionWand;

import java.util.HashSet;
import java.util.Set;

public class ReplacementRegistry
{
    private static final HashSet<HashSet<Item>> replacements = new HashSet<>();

    public static void init() {
        replacements.clear();

        for(Object key : ConfigServer.SIMILAR_BLOCKS.get()) {
            if(!(key instanceof String)) continue;
            HashSet<Item> set = new HashSet<>();

            for(String id : ((String) key).split(";")) {
                Item item = ForgeRegistries.ITEMS.getValue(new ResourceLocation(id));
                if(item == null || item == Items.AIR) {
                    ConstructionWand.LOGGER.warn("Replacement Registry: Could not find item " + id);
                    continue;
                }
                set.add(item);
            }
            if(!set.isEmpty()) replacements.add(set);
        }
    }

    public static Set<Item> getMatchingSet(Item item) {
        HashSet<Item> res = new HashSet<>();

        for(HashSet<Item> set : replacements) {
            if(set.contains(item)) res.addAll(set);
        }
        res.remove(item);
        return res;
    }

    public static boolean matchBlocks(Block b1, Block b2) {
        if(b1 == b2) return true;
        if(b1 == Blocks.AIR || b2 == Blocks.AIR) return false;

        for(HashSet<Item> set : replacements) {
            if(set.contains(b1.asItem()) && set.contains(b2.asItem())) return true;
        }
        return false;
    }
}