From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: William Blake Galbreath <blake.galbreath@gmail.com>
Date: Sun, 14 Jul 2019 19:52:47 -0500
Subject: [PATCH] Mending mends most damages equipment first


diff --git a/src/main/java/net/minecraft/world/entity/ExperienceOrb.java b/src/main/java/net/minecraft/world/entity/ExperienceOrb.java
index eca634792d2a7cc649675e3394e84dbaf1453905..2bd576849403bc2cfae298c2210616192ddc38db 100644
--- a/src/main/java/net/minecraft/world/entity/ExperienceOrb.java
+++ b/src/main/java/net/minecraft/world/entity/ExperienceOrb.java
@@ -331,7 +331,7 @@ public class ExperienceOrb extends Entity {
     }
 
     private int repairPlayerItems(Player player, int amount) {
-        Entry<EquipmentSlot, ItemStack> entry = EnchantmentHelper.getRandomItemWith(Enchantments.MENDING, player, ItemStack::isDamaged);
+        Entry<EquipmentSlot, ItemStack> entry = level().purpurConfig.useBetterMending ? EnchantmentHelper.getMostDamagedEquipment(Enchantments.MENDING, player) : EnchantmentHelper.getRandomItemWith(Enchantments.MENDING, player, ItemStack::isDamaged); // Purpur
 
         if (entry != null) {
             ItemStack itemstack = (ItemStack) entry.getValue();
diff --git a/src/main/java/net/minecraft/world/item/ItemStack.java b/src/main/java/net/minecraft/world/item/ItemStack.java
index 879cc823d56625867eb73bb621db6a13f40ad81c..d8c1c16d3c4b35860e860cf6aef774916822ec9c 100644
--- a/src/main/java/net/minecraft/world/item/ItemStack.java
+++ b/src/main/java/net/minecraft/world/item/ItemStack.java
@@ -583,6 +583,16 @@ public final class ItemStack {
         return this.isDamageableItem() && this.getDamageValue() > 0;
     }
 
+    // Purpur start
+    public float getDamagePercent() {
+        if (isDamaged()) {
+            return (float) getDamageValue() / (float) getItem().getMaxDamage();
+        } else {
+            return 0F;
+        }
+    }
+    // Purpur end
+
     public int getDamageValue() {
         return this.tag == null ? 0 : this.tag.getInt("Damage");
     }
diff --git a/src/main/java/net/minecraft/world/item/enchantment/EnchantmentHelper.java b/src/main/java/net/minecraft/world/item/enchantment/EnchantmentHelper.java
index ecf640b00007a386290f8dfe9935a8aa610079fd..2048899f8e4c8211e8dde0d11148d647678009fa 100644
--- a/src/main/java/net/minecraft/world/item/enchantment/EnchantmentHelper.java
+++ b/src/main/java/net/minecraft/world/item/enchantment/EnchantmentHelper.java
@@ -278,6 +278,29 @@ public class EnchantmentHelper {
         return getItemEnchantmentLevel(Enchantments.CHANNELING, stack) > 0;
     }
 
+    // Purpur start
+    @Nullable
+    public static Map.Entry<EquipmentSlot, ItemStack> getMostDamagedEquipment(Enchantment enchantment, LivingEntity entity) {
+        Map<EquipmentSlot, ItemStack> map = enchantment.getSlotItems(entity);
+        if (map.isEmpty()) {
+            return null;
+        }
+        Map.Entry<EquipmentSlot, ItemStack> item = null;
+        float maxPercent = 0F;
+        for (Map.Entry<EquipmentSlot, ItemStack> entry : map.entrySet()) {
+            ItemStack itemstack = entry.getValue();
+            if (!itemstack.isEmpty() && itemstack.isDamaged() && getItemEnchantmentLevel(enchantment, itemstack) > 0) {
+                float percent = itemstack.getDamagePercent();
+                if (item == null || percent > maxPercent) {
+                    item = entry;
+                    maxPercent = percent;
+                }
+            }
+        }
+        return item;
+    }
+    // Purpur end
+
     @Nullable
     public static Map.Entry<EquipmentSlot, ItemStack> getRandomItemWith(Enchantment enchantment, LivingEntity entity) {
         return getRandomItemWith(enchantment, entity, (stack) -> {
diff --git a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
index d935bc8e47b31ff8ec66cd3c6a5b19450b4684d5..9e4428db0ffa0f1b0e0ae11af903d3449c782ee4 100644
--- a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
+++ b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
@@ -95,6 +95,7 @@ public class PurpurWorldConfig {
         armorstandStepHeight = (float) getDouble("gameplay-mechanics.armorstand.step-height", armorstandStepHeight);
     }
 
+    public boolean useBetterMending = false;
     public boolean boatEjectPlayersOnLand = false;
     public boolean disableDropsOnCrammingDeath = false;
     public boolean milkCuresBadOmen = true;
@@ -102,6 +103,7 @@ public class PurpurWorldConfig {
     public double voidDamageHeight = -64.0D;
     public double voidDamageDealt = 4.0D;
     private void miscGameplayMechanicsSettings() {
+        useBetterMending = getBoolean("gameplay-mechanics.use-better-mending", useBetterMending);
         boatEjectPlayersOnLand = getBoolean("gameplay-mechanics.boat.eject-players-on-land", boatEjectPlayersOnLand);
         disableDropsOnCrammingDeath = getBoolean("gameplay-mechanics.disable-drops-on-cramming-death", disableDropsOnCrammingDeath);
         milkCuresBadOmen = getBoolean("gameplay-mechanics.milk-cures-bad-omen", milkCuresBadOmen);