Enchantment and potions

src/main/java/ru/betterend/BetterEnd.java

@@ -5,6 +5,8 @@ import net.fabricmc.api.ModInitializer;
 import net.minecraft.util.Identifier;
 
 import ru.betterend.config.MainConfig;
+import ru.betterend.effects.EndEnchantments;
+import ru.betterend.effects.EndPotions;
 import ru.betterend.recipe.CraftingRecipes;
 import ru.betterend.registry.BiomeRegistry;
 import ru.betterend.registry.BlockEntityRegistry;
@@ -38,6 +40,8 @@ public class BetterEnd implements ModInitializer {
 		BetterEndBiomeSource.register();
 		ItemTagRegistry.register();
 		BlockTagRegistry.register();
+		EndEnchantments.register();
+		EndPotions.register();
 		CraftingRecipes.register();
 		StructureRegistry.register();
 	}

src/main/java/ru/betterend/effects/EndEnchantments.java

@@ -0,0 +1,16 @@
+package ru.betterend.effects;
+
+import net.minecraft.enchantment.Enchantment;
+import net.minecraft.util.registry.Registry;
+import ru.betterend.BetterEnd;
+import ru.betterend.effects.enchantment.EndVeilEnchantment;
+
+public class EndEnchantments {
+	public final static Enchantment END_VEIL = registerEnchantment("end_veil", new EndVeilEnchantment());
+	
+	public static Enchantment registerEnchantment(String name, Enchantment enchantment) {
+		return Registry.register(Registry.ENCHANTMENT, BetterEnd.makeID(name), enchantment);
+	}
+	
+	public static void register() {}
+}

src/main/java/ru/betterend/effects/EndPotions.java

@@ -0,0 +1,29 @@
+package ru.betterend.effects;
+
+import net.minecraft.entity.effect.StatusEffect;
+import net.minecraft.entity.effect.StatusEffectInstance;
+import net.minecraft.item.Items;
+import net.minecraft.potion.Potion;
+import net.minecraft.potion.Potions;
+import net.minecraft.util.registry.Registry;
+import ru.betterend.BetterEnd;
+import ru.betterend.mixin.common.BrewingAccessor;
+import ru.betterend.registry.ItemRegistry;
+
+public class EndPotions {
+	public final static Potion END_VEIL = registerPotion("end_veil", EndStatusEffects.END_VEIL, 3600);
+	public final static Potion LONG_END_VEIL = registerPotion("long_end_veil", EndStatusEffects.END_VEIL, 9600);
+	
+	public static Potion registerPotion(String name, StatusEffect effect, int duration) {
+		return registerPotion(name, new Potion(name, new StatusEffectInstance[]{ new StatusEffectInstance(effect, duration) }));
+	}
+	
+	public static Potion registerPotion(String name, Potion potion) {
+		return Registry.register(Registry.POTION, BetterEnd.makeID(name), potion);
+	}
+	
+	public static void register() {
+		BrewingAccessor.callRegisterPotionRecipe(Potions.AWKWARD, ItemRegistry.ENDER_DUST, END_VEIL);
+		BrewingAccessor.callRegisterPotionRecipe(END_VEIL, Items.REDSTONE, LONG_END_VEIL);
+	}
+}

src/main/java/ru/betterend/effects/EndStatusEffects.java

@@ -0,0 +1,15 @@
+package ru.betterend.effects;
+
+import net.minecraft.entity.effect.StatusEffect;
+import net.minecraft.util.registry.Registry;
+import ru.betterend.BetterEnd;
+import ru.betterend.effects.status.EndVeilEffect;
+
+public class EndStatusEffects {
+	
+	public final static StatusEffect END_VEIL = registerEffect("end_veil", new EndVeilEffect());
+	
+	public static <E extends StatusEffect> StatusEffect registerEffect(String name, E effect) {
+		return Registry.register(Registry.STATUS_EFFECT, BetterEnd.makeID(name), effect);
+	}
+}

src/main/java/ru/betterend/effects/enchantment/EndVeilEnchantment.java

@@ -0,0 +1,17 @@
+package ru.betterend.effects.enchantment;
+
+import net.minecraft.enchantment.Enchantment;
+import net.minecraft.enchantment.EnchantmentTarget;
+import net.minecraft.entity.EquipmentSlot;
+
+public class EndVeilEnchantment extends Enchantment {
+
+	public EndVeilEnchantment() {
+		super(Enchantment.Rarity.VERY_RARE, EnchantmentTarget.ARMOR_HEAD, new EquipmentSlot[] { EquipmentSlot.HEAD });
+	}
+	
+	@Override
+	public boolean isAvailableForRandomSelection() {
+		return false;
+	}
+}

src/main/java/ru/betterend/effects/status/EndVeilEffect.java

@@ -0,0 +1,16 @@
+package ru.betterend.effects.status;
+
+import net.minecraft.entity.effect.StatusEffect;
+import net.minecraft.entity.effect.StatusEffectType;
+
+public class EndVeilEffect extends StatusEffect {
+
+	public EndVeilEffect() {
+		super(StatusEffectType.BENEFICIAL, 0x0D554A);
+	}
+	
+	@Override
+	public boolean canApplyUpdateEffect(int duration, int amplifier) {
+		return false;
+	}
+}

src/main/java/ru/betterend/mixin/common/BrewingAccessor.java

@@ -0,0 +1,16 @@
+package ru.betterend.mixin.common;
+
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.gen.Invoker;
+
+import net.minecraft.item.Item;
+import net.minecraft.potion.Potion;
+import net.minecraft.recipe.BrewingRecipeRegistry;
+
+@Mixin(BrewingRecipeRegistry.class)
+public interface BrewingAccessor {
+	@Invoker
+	static void callRegisterPotionRecipe(Potion input, Item item, Potion output) {
+		throw new AssertionError("@Invoker dummy body called");
+	}
+}

src/main/java/ru/betterend/mixin/common/EndermanEntityMixin.java

@@ -0,0 +1,26 @@
+package ru.betterend.mixin.common;
+
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
+import net.minecraft.enchantment.EnchantmentHelper;
+import net.minecraft.entity.mob.EndermanEntity;
+import net.minecraft.entity.player.PlayerEntity;
+
+import ru.betterend.effects.EndEnchantments;
+import ru.betterend.effects.EndStatusEffects;
+
+@Mixin(EndermanEntity.class)
+public abstract class EndermanEntityMixin {
+	
+	@Inject(method = "isPlayerStaring", at = @At("HEAD"), cancellable = true)
+	private void isPlayerStaring(PlayerEntity player, CallbackInfoReturnable<Boolean> info) {
+		if (player.isCreative() || player.hasStatusEffect(EndStatusEffects.END_VEIL) ||
+				EnchantmentHelper.getEquipmentLevel(EndEnchantments.END_VEIL, player) > 0) {
+			info.setReturnValue(false);
+			info.cancel();
+		}
+	}
+}