move damage events before damage effects are applied

src/main/java/carpet/mixins/PlayerEntity_scarpetEventsMixin.java

@@ -0,0 +1,46 @@
+package carpet.mixins;
+
+import carpet.CarpetSettings;
+import carpet.fakes.EntityInterface;
+import carpet.script.EntityEventsGroup;
+import net.minecraft.entity.EntityType;
+import net.minecraft.entity.LivingEntity;
+import net.minecraft.entity.damage.DamageSource;
+import net.minecraft.entity.player.PlayerEntity;
+import net.minecraft.server.network.ServerPlayerEntity;
+import net.minecraft.world.World;
+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.CallbackInfo;
+import org.spongepowered.asm.mixin.injection.callback.LocalCapture;
+
+import static carpet.script.CarpetEventServer.Event.PLAYER_DEALS_DAMAGE;
+import static carpet.script.CarpetEventServer.Event.PLAYER_TAKES_DAMAGE;
+
+@Mixin(PlayerEntity.class)
+public abstract class PlayerEntity_scarpetEventsMixin extends LivingEntity
+{
+    protected PlayerEntity_scarpetEventsMixin(EntityType<? extends LivingEntity> type, World world)
+    {
+        super(type, world);
+    }
+
+    @Inject(method = "applyDamage", locals = LocalCapture.CAPTURE_FAILHARD, at = @At(
+            value = "INVOKE",
+            target = "Lnet/minecraft/entity/player/PlayerEntity;addExhaustion(F)V"
+    ))
+    private void playerTakingDamage(DamageSource source, float amount, CallbackInfo ci)
+    {
+        // version of LivingEntity_scarpetEventsMixin::entityTakingDamage
+        ((EntityInterface)this).getEventContainer().onEvent(EntityEventsGroup.EntityEventType.ON_DAMAGE, amount, source);
+        if (PLAYER_TAKES_DAMAGE.isNeeded())
+        {
+            PLAYER_TAKES_DAMAGE.onDamage(this, amount, source);
+        }
+        if (source.getAttacker() instanceof ServerPlayerEntity && PLAYER_DEALS_DAMAGE.isNeeded())
+        {
+            PLAYER_DEALS_DAMAGE.onDamage(this, amount, source);
+        }
+    }
+}