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/server/EntityLiving.java b/src/main/java/net/minecraft/server/EntityLiving.java
index 435726651ada6ccb4bbd31fe21a439d29f131098..be5f2147e9cded85620a57a90c7d800262fc3d6e 100644
--- a/src/main/java/net/minecraft/server/EntityLiving.java
+++ b/src/main/java/net/minecraft/server/EntityLiving.java
@@ -2851,7 +2851,16 @@ public abstract class EntityLiving extends Entity {
             if (itemstack.getItem() == Items.ELYTRA && ItemElytra.d(itemstack)) {
                 flag = true;
                 if (!this.world.isClientSide && (this.be + 1) % 20 == 0) {
-                    itemstack.damage(1, this, (entityliving) -> {
+                    // Purpur start
+                    int damage = world.purpurConfig.elytraDamagePerSecond;
+                    if (world.purpurConfig.elytraDamageMultiplyBySpeed > 0) {
+                        double speed = getMot().magnitudeSquared();
+                        if (speed > world.purpurConfig.elytraDamageMultiplyBySpeed) {
+                            damage *= (int) speed;
+                        }
+                    }
+                    itemstack.damage(damage, this, (entityliving) -> {
+                    // Purpur end
                         entityliving.broadcastItemBreak(EnumItemSlot.CHEST);
                     });
                 }
diff --git a/src/main/java/net/minecraft/server/ItemFireworks.java b/src/main/java/net/minecraft/server/ItemFireworks.java
index e775fe69ee7e555721bc73e7cb0dd3136736bc9c..990eb656699d9ead26b42fbb305530b7ae860ee8 100644
--- a/src/main/java/net/minecraft/server/ItemFireworks.java
+++ b/src/main/java/net/minecraft/server/ItemFireworks.java
@@ -43,6 +43,14 @@ public class ItemFireworks extends Item {
                 // Paper start
                 com.destroystokyo.paper.event.player.PlayerElytraBoostEvent event = new com.destroystokyo.paper.event.player.PlayerElytraBoostEvent((org.bukkit.entity.Player) entityhuman.getBukkitEntity(), org.bukkit.craftbukkit.inventory.CraftItemStack.asCraftMirror(itemstack), (org.bukkit.entity.Firework) entityfireworks.getBukkitEntity());
                 if (event.callEvent() && world.addEntity(entityfireworks)) {
+                    // Purpur start
+                    if (world.purpurConfig.elytraDamagePerFireworkBoost > 0) {
+                        ItemStack chestItem = entityhuman.getEquipment(EnumItemSlot.CHEST);
+                        if (chestItem.getItem() == Items.ELYTRA) {
+                            chestItem.damage(world.purpurConfig.elytraDamagePerFireworkBoost, entityhuman, (entityliving) -> entityliving.broadcastItemBreak(EnumItemSlot.CHEST));
+                        }
+                    }
+                    // Purpur end
                     if (event.shouldConsume() && !entityhuman.abilities.canInstantlyBuild) {
                         itemstack.subtract(1);
                     } else ((EntityPlayer) entityhuman).getBukkitEntity().updateInventory();
diff --git a/src/main/java/net/minecraft/server/ItemStack.java b/src/main/java/net/minecraft/server/ItemStack.java
index 0d011a1aae667f473f1ad2ec60d8506cd32dff6d..623bcb93cbdf0f67ee999104936f9d60c5228037 100644
--- a/src/main/java/net/minecraft/server/ItemStack.java
+++ b/src/main/java/net/minecraft/server/ItemStack.java
@@ -450,7 +450,7 @@ public final class ItemStack {
             int j;
 
             if (i > 0) {
-                j = EnchantmentManager.getEnchantmentLevel(Enchantments.DURABILITY, this);
+                j = (getItem() == Items.ELYTRA && entityplayer != null && entityplayer.world.purpurConfig.elytraIgnoreUnbreaking) ? 0 : EnchantmentManager.getEnchantmentLevel(Enchantments.DURABILITY, this); // Purpur
                 int k = 0;
 
                 for (int l = 0; j > 0 && l < i; ++l) {
@@ -496,6 +496,12 @@ public final class ItemStack {
                 if (this.isDamaged(i, t0.getRandom(), t0 instanceof EntityPlayer ? (EntityPlayer) t0 : null)) {
                     consumer.accept(t0);
                     Item item = this.getItem();
+                    // Purpur start
+                    if (item == Items.ELYTRA) {
+                        setDamage(item.getMaxDurability() - 1);
+                        return;
+                    }
+                    // Purpur end
                     // CraftBukkit start - Check for item breaking
                     if (this.count == 1 && t0 instanceof EntityHuman) {
                         org.bukkit.craftbukkit.event.CraftEventFactory.callPlayerItemBreakEvent((EntityHuman) t0, this);
diff --git a/src/main/java/net/minecraft/server/ItemTrident.java b/src/main/java/net/minecraft/server/ItemTrident.java
index 3663b701736b583db80e3119b642e47b8a0e6ff3..18f767dc574e7345d2db73e6be44f4e65eb58c63 100644
--- a/src/main/java/net/minecraft/server/ItemTrident.java
+++ b/src/main/java/net/minecraft/server/ItemTrident.java
@@ -102,6 +102,16 @@ public class ItemTrident extends Item implements ItemVanishable {
                         f2 *= f6 / f5;
                         f3 *= f6 / f5;
                         f4 *= f6 / f5;
+
+                        // Purpur start
+                        ItemStack chestItem = entityhuman.getEquipment(EnumItemSlot.CHEST);
+                        if (chestItem.getItem() == Items.ELYTRA && world.purpurConfig.elytraDamagePerTridentBoost > 0) {
+                            chestItem.damage(world.purpurConfig.elytraDamagePerTridentBoost, entityhuman, (entity) -> {
+                                entity.broadcastItemBreak(EnumItemSlot.CHEST);
+                            });
+                        }
+                        // Purpur end
+
                         entityhuman.i((double) f2, (double) f3, (double) f4);
                         entityhuman.r(20);
                         if (entityhuman.isOnGround()) {
diff --git a/src/main/java/net/pl3x/purpur/PurpurWorldConfig.java b/src/main/java/net/pl3x/purpur/PurpurWorldConfig.java
index d61a96f0d9fc92780da0c698ffb4b903878a4198..886c3b98d6bff04a93cd963a092654ef1c9729d1 100644
--- a/src/main/java/net/pl3x/purpur/PurpurWorldConfig.java
+++ b/src/main/java/net/pl3x/purpur/PurpurWorldConfig.java
@@ -129,6 +129,19 @@ public class PurpurWorldConfig {
         voidDamageHeight = getDouble("gameplay-mechanics.void-damage-height", voidDamageHeight);
     }
 
+    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 String playerDeathExpDropEquation = "expLevel * 7";
     public int playerDeathExpDropMax = 100;
     private void playerDeathExpSettings() {