Add a fortification status effect so earth ponies can see when they're fortified

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/AttractionUtils.java

@@ -3,6 +3,7 @@ package com.minelittlepony.unicopia.ability.magic.spell.effect;
 import org.jetbrains.annotations.Nullable;
 
 import com.minelittlepony.unicopia.entity.Living;
+import com.minelittlepony.unicopia.entity.effect.EffectUtils;
 import com.minelittlepony.unicopia.entity.player.Pony;
 import com.minelittlepony.unicopia.item.enchantment.UEnchantments;
 
@@ -61,12 +62,10 @@ public interface AttractionUtils {
         return Pony.of(entity).map(pony -> {
             double force = 0.75;
 
-            if (pony.getCompositeRace().canUseEarth()) {
+            if (EffectUtils.hasExtraDefenses(pony.asEntity())) {
+                force /= 12;
+            } else if (pony.getCompositeRace().canUseEarth()) {
                 force /= 2;
-
-                if (pony.asEntity().isSneaking()) {
-                    force /= 6;
-                }
             } else if (pony.getCompositeRace().canFly()) {
                 force *= 2;
             }

src/main/java/com/minelittlepony/unicopia/entity/effect/EffectUtils.java

@@ -2,6 +2,7 @@ package com.minelittlepony.unicopia.entity.effect;
 
 import net.minecraft.entity.LivingEntity;
 import net.minecraft.entity.effect.StatusEffect;
+import net.minecraft.entity.effect.StatusEffectInstance;
 
 public interface EffectUtils {
     static boolean isPoisoned(LivingEntity entity) {
@@ -15,4 +16,26 @@ public interface EffectUtils {
     static boolean isChangingRace(LivingEntity entity) {
         return entity.getStatusEffects().stream().anyMatch(effect -> effect.getEffectType() instanceof RaceChangeStatusEffect);
     }
+
+    static boolean hasExtraDefenses(LivingEntity entity) {
+        return entity.hasStatusEffect(UEffects.FORTIFICATION);
+    }
+
+    static boolean applyStatusEffect(LivingEntity entity, StatusEffect effect, boolean apply) {
+        if (entity.getWorld().isClient) {
+            return false;
+        }
+        boolean has = entity.hasStatusEffect(effect);
+        if (has != apply) {
+            if (has) {
+                if (entity.getStatusEffect(effect).getDuration() == StatusEffectInstance.INFINITE) {
+                    entity.removeStatusEffect(effect);
+                }
+            } else {
+                entity.addStatusEffect(new StatusEffectInstance(effect, StatusEffectInstance.INFINITE, 0, false, false, true));
+            }
+            return true;
+        }
+        return false;
+    }
 }

src/main/java/com/minelittlepony/unicopia/entity/effect/SimpleStatusEffect.java

@@ -0,0 +1,33 @@
+package com.minelittlepony.unicopia.entity.effect;
+
+import org.jetbrains.annotations.Nullable;
+
+import net.minecraft.entity.Entity;
+import net.minecraft.entity.LivingEntity;
+import net.minecraft.entity.effect.StatusEffect;
+import net.minecraft.entity.effect.StatusEffectCategory;
+
+public class SimpleStatusEffect extends StatusEffect {
+
+    private final boolean instant;
+
+    public SimpleStatusEffect(StatusEffectCategory category, int color, boolean instant) {
+        super(category, color);
+        this.instant = instant;
+    }
+
+    @Override
+    public void applyUpdateEffect(LivingEntity entity, int amplifier) {
+
+    }
+
+    @Override
+    public void applyInstantEffect(@Nullable Entity source, @Nullable Entity attacker, LivingEntity target, int amplifier, double proximity) {
+
+    }
+
+    @Override
+    public final boolean isInstant() {
+        return instant;
+    }
+}

src/main/java/com/minelittlepony/unicopia/entity/effect/UEffects.java

@@ -15,7 +15,8 @@ public interface UEffects {
      * When affecting an entity, will give them a random chance to reproduce or duplicate themselves when they die.
      */
     StatusEffect CORRUPT_INFLUENCE = register("corrupt_influence", new CorruptInfluenceStatusEffect(0x00FF00));
-    StatusEffect PARALYSIS = register("paralysis", new StatusEffect(StatusEffectCategory.HARMFUL, 0) {});
+    StatusEffect PARALYSIS = register("paralysis", new SimpleStatusEffect(StatusEffectCategory.HARMFUL, 0, false));
+    StatusEffect FORTIFICATION = register("fortification", new SimpleStatusEffect(StatusEffectCategory.BENEFICIAL, 0x000077, false));
     /**
      * Side-effect of wearing the alicorn amulet.
      * Causes the player to lose grip on whatever item they're holding.

src/main/java/com/minelittlepony/unicopia/entity/player/PlayerAttributes.java

@@ -6,6 +6,8 @@ import java.util.function.Predicate;
 
 import com.minelittlepony.unicopia.Race;
 import com.minelittlepony.unicopia.ability.magic.spell.effect.SpellType;
+import com.minelittlepony.unicopia.entity.effect.EffectUtils;
+import com.minelittlepony.unicopia.entity.effect.UEffects;
 import com.minelittlepony.unicopia.entity.mob.UEntityAttributes;
 import com.minelittlepony.unicopia.util.Tickable;
 
@@ -87,6 +89,7 @@ public class PlayerAttributes implements Tickable {
     @Override
     public void tick() {
         ATTRIBUTES.forEach(attribute -> attribute.update(pony));
+        EffectUtils.applyStatusEffect(pony.asEntity(), UEffects.FORTIFICATION, pony.getCompositeRace().canUseEarth() && pony.asEntity().isSneaking());
     }
 
     record ToggleableAttribute(EntityAttributeModifier modifier, List<EntityAttribute> attributes, Predicate<Pony> test) {

src/main/java/com/minelittlepony/unicopia/entity/player/Pony.java

@@ -21,6 +21,7 @@ import com.minelittlepony.unicopia.advancement.UCriteria;
 import com.minelittlepony.unicopia.entity.*;
 import com.minelittlepony.unicopia.entity.behaviour.EntityAppearance;
 import com.minelittlepony.unicopia.entity.duck.LivingEntityDuck;
+import com.minelittlepony.unicopia.entity.effect.EffectUtils;
 import com.minelittlepony.unicopia.entity.effect.MetamorphosisStatusEffect;
 import com.minelittlepony.unicopia.entity.effect.SunBlindnessStatusEffect;
 import com.minelittlepony.unicopia.entity.effect.UEffects;
@@ -700,19 +701,18 @@ public class Pony extends Living<PlayerEntity> implements Copyable<Pony>, Update
             }
         }
 
-        if (!cause.isIn(DamageTypeTags.BYPASSES_SHIELD)
+        if (EffectUtils.hasExtraDefenses(entity)
+                && !cause.isIn(DamageTypeTags.BYPASSES_SHIELD)
                 && !cause.isOf(DamageTypes.MAGIC)
                 && !cause.isIn(DamageTypeTags.IS_FIRE)
                 && !cause.isIn(DamageTypeTags.BYPASSES_INVULNERABILITY)
                 && !cause.isOf(DamageTypes.THORNS)
                 && !cause.isOf(DamageTypes.FREEZE)) {
 
-            if (getCompositeRace().canUseEarth() && entity.isSneaking()) {
             amount /= (cause.isOf(DamageTypes.MOB_PROJECTILE) ? 3 : 2) * (entity.getHealth() < 5 ? 3 : 1);
 
             return Optional.of(amount);
         }
-        }
         return Optional.empty();
     }
 
@@ -727,7 +727,7 @@ public class Pony extends Living<PlayerEntity> implements Copyable<Pony>, Update
     public float onImpact(float distance, float damageMultiplier, DamageSource cause) {
         distance = super.onImpact(distance, damageMultiplier, cause);
 
-        if (getCompositeRace().canUseEarth() && entity.isSneaking()) {
+        if (EffectUtils.hasExtraDefenses(entity)) {
             double radius = distance / 10;
             if (radius > 0) {
                 EarthPonyStompAbility.spawnEffectAround(entity, entity.getSteppingPos(), radius, radius);
@@ -750,7 +750,7 @@ public class Pony extends Living<PlayerEntity> implements Copyable<Pony>, Update
                 }
             }
 
-            if (getCompositeRace().canFly() || (getCompositeRace().canUseEarth() && entity.isSneaking())) {
+            if (getCompositeRace().canFly() || EffectUtils.hasExtraDefenses(entity)) {
                 distance -= 5;
             }
         }

src/main/resources/assets/unicopia/lang/en_us.json

@@ -406,6 +406,7 @@
   "effect.unicopia.corrupt_influence": "Corrupt Influence",
   "effect.unicopia.paralysis": "Paralysis",
   "effect.unicopia.butter_fingers": "Butterfingers",
+  "effect.unicopia.fortification": "Fortification",
 
   "effect.unicopia.change_race_earth": "Earth Pony Metamorphosis",
   "effect.unicopia.change_race_unicorn": "Unicorn Metamorphosis",