From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: William Blake Galbreath <blake.galbreath@gmail.com>
Date: Thu, 25 Jul 2019 18:07:37 -0500
Subject: [PATCH] Implement elytra settings


diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
index 2ebe8c165c8b425d437e0b359e3f2ad851b84273..56ffc7ae9bf9dabcbe6e993475a9bf5c0e337926 100644
--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
@@ -3589,7 +3589,16 @@ public abstract class LivingEntity extends Entity implements Attackable {
                     int j = i / 10;
 
                     if (j % 2 == 0) {
-                        itemstack.hurtAndBreak(1, this, (entityliving) -> {
+                        // Purpur start
+                        int damage = level().purpurConfig.elytraDamagePerSecond;
+                        if (level().purpurConfig.elytraDamageMultiplyBySpeed > 0) {
+                            double speed = getDeltaMovement().lengthSqr();
+                            if (speed > level().purpurConfig.elytraDamageMultiplyBySpeed) {
+                                damage *= (int) speed;
+                            }
+                        }
+                        itemstack.hurtAndBreak(damage, this, (entityliving) -> {
+                        // Purpur end
                             entityliving.broadcastBreakEvent(EquipmentSlot.CHEST);
                         });
                     }
diff --git a/src/main/java/net/minecraft/world/item/FireworkRocketItem.java b/src/main/java/net/minecraft/world/item/FireworkRocketItem.java
index 409c6d5820d4ab3a84e64a3837a83d3ef28a38c7..b70ed576b304bcc383a3d67f36be6575b39b1280 100644
--- a/src/main/java/net/minecraft/world/item/FireworkRocketItem.java
+++ b/src/main/java/net/minecraft/world/item/FireworkRocketItem.java
@@ -15,6 +15,7 @@ import net.minecraft.util.ByIdMap;
 import net.minecraft.world.InteractionHand;
 import net.minecraft.world.InteractionResult;
 import net.minecraft.world.InteractionResultHolder;
+import net.minecraft.world.entity.EquipmentSlot;
 import net.minecraft.world.entity.player.Player;
 import net.minecraft.world.entity.projectile.FireworkRocketEntity;
 import net.minecraft.world.item.context.UseOnContext;
@@ -76,6 +77,14 @@ public class FireworkRocketItem extends Item {
                 com.destroystokyo.paper.event.player.PlayerElytraBoostEvent event = new com.destroystokyo.paper.event.player.PlayerElytraBoostEvent((org.bukkit.entity.Player) user.getBukkitEntity(), org.bukkit.craftbukkit.inventory.CraftItemStack.asCraftMirror(itemStack), (org.bukkit.entity.Firework) fireworkRocketEntity.getBukkitEntity(), org.bukkit.craftbukkit.CraftEquipmentSlot.getHand(hand));
                 if (event.callEvent() && world.addFreshEntity(fireworkRocketEntity)) {
                     user.awardStat(Stats.ITEM_USED.get(this));
+                    // Purpur start
+                    if (world.purpurConfig.elytraDamagePerFireworkBoost > 0) {
+                        ItemStack chestItem = user.getItemBySlot(EquipmentSlot.CHEST);
+                        if (chestItem.getItem() == Items.ELYTRA) {
+                            chestItem.hurtAndBreak(world.purpurConfig.elytraDamagePerFireworkBoost, user, (entityliving) -> entityliving.broadcastBreakEvent(EquipmentSlot.CHEST));
+                        }
+                    }
+                    // Purpur end
                     if (event.shouldConsume() && !user.getAbilities().instabuild) {
                     itemStack.shrink(1);
                     } else ((net.minecraft.server.level.ServerPlayer) user).getBukkitEntity().updateInventory();
diff --git a/src/main/java/net/minecraft/world/item/ItemStack.java b/src/main/java/net/minecraft/world/item/ItemStack.java
index 38e097807c5034c077a10d3af08bf348a008d229..5b0816b6c01912c41e588559597edf8b5902fcd3 100644
--- a/src/main/java/net/minecraft/world/item/ItemStack.java
+++ b/src/main/java/net/minecraft/world/item/ItemStack.java
@@ -642,7 +642,7 @@ public final class ItemStack {
             int j;
 
             if (amount > 0) {
-                j = EnchantmentHelper.getItemEnchantmentLevel(Enchantments.UNBREAKING, this);
+                j = (getItem() == Items.ELYTRA && player != null && player.level().purpurConfig.elytraIgnoreUnbreaking) ? 0 : EnchantmentHelper.getItemEnchantmentLevel(Enchantments.UNBREAKING, this);
                 int k = 0;
 
                 for (int l = 0; j > 0 && l < amount; ++l) {
@@ -697,6 +697,12 @@ public final class ItemStack {
                 if (this.hurt(amount, entity.getRandom(), entity /*instanceof ServerPlayer ? (ServerPlayer) entity : null*/)) { // Paper - Add EntityDamageItemEvent
                     breakCallback.accept(entity);
                     Item item = this.getItem();
+                    // Purpur start
+                    if (item == Items.ELYTRA) {
+                        setDamageValue(item.getMaxDamage() - 1);
+                        return;
+                    }
+                    // Purpur end
                     // CraftBukkit start - Check for item breaking
                     if (this.count == 1 && entity instanceof net.minecraft.world.entity.player.Player) {
                         org.bukkit.craftbukkit.event.CraftEventFactory.callPlayerItemBreakEvent((net.minecraft.world.entity.player.Player) entity, this);
diff --git a/src/main/java/net/minecraft/world/item/TridentItem.java b/src/main/java/net/minecraft/world/item/TridentItem.java
index a792c7b7a6179aa88fc473b27ef0ca13bd91a395..c2218c2dd46641ebb4c9278fa0d6015122b1905c 100644
--- a/src/main/java/net/minecraft/world/item/TridentItem.java
+++ b/src/main/java/net/minecraft/world/item/TridentItem.java
@@ -128,6 +128,14 @@ public class TridentItem extends Item implements Vanishable {
                         f3 *= f6 / f5;
                         f4 *= f6 / f5;
                         org.bukkit.craftbukkit.event.CraftEventFactory.callPlayerRiptideEvent(entityhuman, stack, f2, f3, f4); // CraftBukkit
+
+                        // Purpur start
+                        ItemStack chestItem = entityhuman.getItemBySlot(EquipmentSlot.CHEST);
+                        if (chestItem.getItem() == Items.ELYTRA && world.purpurConfig.elytraDamagePerTridentBoost > 0) {
+                            chestItem.hurtAndBreak(world.purpurConfig.elytraDamagePerTridentBoost, entityhuman, (entity) -> entity.broadcastBreakEvent(EquipmentSlot.CHEST));
+                        }
+                        // Purpur end
+
                         entityhuman.push((double) f2, (double) f3, (double) f4);
                         entityhuman.startAutoSpinAttack(20);
                         if (entityhuman.onGround()) {
diff --git a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
index 6705d722e1abe678a5cb90503904dc7888bf55ee..88aabe09118cbbad3add3cee44e237580294f685 100644
--- a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
+++ b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
@@ -112,6 +112,19 @@ public class PurpurWorldConfig {
         voidDamageDealt = getDouble("gameplay-mechanics.void-damage-dealt", voidDamageDealt);
     }
 
+    public int elytraDamagePerSecond = 1;
+    public double elytraDamageMultiplyBySpeed = 0;
+    public boolean elytraIgnoreUnbreaking = false;
+    public int elytraDamagePerFireworkBoost = 0;
+    public int elytraDamagePerTridentBoost = 0;
+    private void elytraSettings() {
+        elytraDamagePerSecond = getInt("gameplay-mechanics.elytra.damage-per-second", elytraDamagePerSecond);
+        elytraDamageMultiplyBySpeed = getDouble("gameplay-mechanics.elytra.damage-multiplied-by-speed", elytraDamageMultiplyBySpeed);
+        elytraIgnoreUnbreaking = getBoolean("gameplay-mechanics.elytra.ignore-unbreaking", elytraIgnoreUnbreaking);
+        elytraDamagePerFireworkBoost = getInt("gameplay-mechanics.elytra.damage-per-boost.firework", elytraDamagePerFireworkBoost);
+        elytraDamagePerTridentBoost = getInt("gameplay-mechanics.elytra.damage-per-boost.trident", elytraDamagePerTridentBoost);
+    }
+
     public double minecartMaxSpeed = 0.4D;
     public boolean minecartPlaceAnywhere = false;
     public boolean minecartControllable = false;