new: CripplingEnchantmentEffect, blindness and weakness

src/main/java/dev/sillyangel/more_spear_enchantments/enchantment/ModEnchantmentEffects.java

@@ -13,11 +13,9 @@ import net.minecraft.enchantment.effect.EnchantmentEntityEffect;
 
 public class ModEnchantmentEffects {
 	public static final RegistryKey<Enchantment> THUNDERING = of("thundering");
-	public static MapCodec<LightningEnchantmentEffect> LIGHTNING_EFFECT = register("lightning_effect", LightningEnchantmentEffect.CODEC);
 	public static final RegistryKey<Enchantment> WITHERING = of("withering");
-	public static MapCodec<WitheringEnchantmentEffect> WITHERING_EFFECT = register("withering_effect", WitheringEnchantmentEffect.CODEC);
 	public static final RegistryKey<Enchantment> POISONING = of("poisoning");
-	public static MapCodec<PoisonEnchantmentEffect> POISONING_EFFECT = register("poisoning_effect", PoisonEnchantmentEffect.CODEC);
+	public static final RegistryKey<Enchantment> CRIPPLING = of("crippling");
 
 
 	private static RegistryKey<Enchantment> of(String path) {

src/main/java/dev/sillyangel/more_spear_enchantments/enchantment/ModEnchantmentGenerator.java

@@ -88,6 +88,25 @@ public class ModEnchantmentGenerator extends FabricDynamicRegistryProvider {
 					new WitheringEnchantmentEffect(EnchantmentLevelBasedValue.linear(2.0f, 1.0f)) // 2s base, +1s per level
 				)
 		);
+		// Our new enchantment, "Crippling."
+		register(entries, ModEnchantmentEffects.CRIPPLING, Enchantment.builder(
+				Enchantment.definition(
+					registries.getOrThrow(RegistryKeys.ITEM).getOrThrow(ModTags.Items.SPEARS),
+					10,
+					3,
+					Enchantment.leveledCost(1, 10),
+					Enchantment.leveledCost(1, 15),
+					5,
+					AttributeModifierSlot.HAND
+				)
+			)
+				.addEffect(
+					EnchantmentEffectComponentTypes.POST_ATTACK,
+					EnchantmentEffectTarget.ATTACKER,
+					EnchantmentEffectTarget.VICTIM,
+					new CripplingEnchantmentEffect(EnchantmentLevelBasedValue.linear(2.0f, 1.0f)) // 2s base, +1s per leve
+				)
+		);
 	}
 
 	private void register(Entries entries, RegistryKey<Enchantment> key, Enchantment.Builder builder, ResourceCondition... resourceConditions) {

src/main/java/dev/sillyangel/more_spear_enchantments/enchantment/effect/CripplingEnchantmentEffect.java

@@ -0,0 +1,52 @@
+package dev.sillyangel.more_spear_enchantments.enchantment.effect;
+
+import com.mojang.serialization.MapCodec;
+import com.mojang.serialization.codecs.RecordCodecBuilder;
+import net.minecraft.server.world.ServerWorld;
+import net.minecraft.entity.Entity;
+import net.minecraft.entity.LivingEntity;
+import net.minecraft.entity.effect.StatusEffectInstance;
+import net.minecraft.entity.effect.StatusEffects;
+import net.minecraft.entity.player.PlayerEntity;
+import net.minecraft.enchantment.EnchantmentEffectContext;
+import net.minecraft.enchantment.EnchantmentLevelBasedValue;
+import net.minecraft.enchantment.effect.EnchantmentEntityEffect;
+import net.minecraft.util.math.Vec3d;
+
+public record CripplingEnchantmentEffect(EnchantmentLevelBasedValue duartion) implements EnchantmentEntityEffect {
+    public static final MapCodec<CripplingEnchantmentEffect> CODEC = RecordCodecBuilder.mapCodec(instance ->
+            instance.group(
+                    EnchantmentLevelBasedValue.CODEC.fieldOf("duration").forGetter(CripplingEnchantmentEffect::duartion)
+            ).apply(instance, CripplingEnchantmentEffect::new)
+    );
+
+    @Override
+    public void apply(ServerWorld world, int level, EnchantmentEffectContext context, Entity target, Vec3d pos) {
+        if (target instanceof LivingEntity victim) {
+            if (context.owner() != null && context.owner() instanceof PlayerEntity player) {
+                int Duration = (int) (this.duartion.getValue(level) * 50); // Convert to ticks
+                int slownessAmplifier = level - 1; // Level 1 = Slowness 0, Level 2 = Slowness I, Level 3 = Slowness II
+                int weaknessAmplifier = level - 1; // Level 1 = Weakness 0, Level 2 = Weakness I, Level 3 = Weakness II
+                victim.addStatusEffect(new StatusEffectInstance(
+                        StatusEffects.SLOWNESS,
+                        Duration,
+                        slownessAmplifier,
+                        false,
+                        true
+                ));
+                victim.addStatusEffect(new StatusEffectInstance(
+                        StatusEffects.WEAKNESS,
+                        Duration,
+                        weaknessAmplifier,
+                        false,
+                        true
+                ));
+            }
+        }
+    }
+
+    @Override
+    public MapCodec<? extends EnchantmentEntityEffect> getCodec() {
+        return CODEC;
+    }
+}