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 6f7188ccba2675264ba8fbfd05cacc1c60211157..b183a9e42178ff02c5d70abacee3cfaa7b7b93c3 100644
--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
@@ -3558,7 +3558,16 @@ public abstract class LivingEntity extends Entity implements Attackable {
                     int j = i / 10;
 
                     if (j % 2 == 0) {
-                        itemstack.hurtAndBreak(1, this, EquipmentSlot.CHEST);
+                        // 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, EquipmentSlot.CHEST);
+                        // Purpur end
                     }
 
                     this.gameEvent(GameEvent.ELYTRA_GLIDE);
diff --git a/src/main/java/net/minecraft/world/item/FireworkRocketItem.java b/src/main/java/net/minecraft/world/item/FireworkRocketItem.java
index 218f2f085309f04438f8b07bc41cf242583db2dc..ea8e49b42b9dde74784189430be66ed6978015dd 100644
--- a/src/main/java/net/minecraft/world/item/FireworkRocketItem.java
+++ b/src/main/java/net/minecraft/world/item/FireworkRocketItem.java
@@ -65,6 +65,14 @@ public class FireworkRocketItem extends Item implements ProjectileItem {
                 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(net.minecraft.world.entity.EquipmentSlot.CHEST);
+                        if (chestItem.getItem() == Items.ELYTRA) {
+                            chestItem.hurtAndBreak(world.purpurConfig.elytraDamagePerFireworkBoost, user, net.minecraft.world.entity.EquipmentSlot.CHEST);
+                        }
+                    }
+                    // Purpur end
                     if (event.shouldConsume() && !user.hasInfiniteMaterials()) {
                         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 930cc4c38a7c7631b140f7735cb03f4c82553375..bb9f480e5a2083633ddde5607b05048bab5f1b52 100644
--- a/src/main/java/net/minecraft/world/item/ItemStack.java
+++ b/src/main/java/net/minecraft/world/item/ItemStack.java
@@ -675,6 +675,7 @@ public final class ItemStack implements DataComponentHolder {
             if (player == null || !player.hasInfiniteMaterials() || force) { // Paper
                 if (amount > 0) {
                     int originalDamage = amount; // Paper - Expand PlayerItemDamageEvent
+                    // (getItem() == Items.ELYTRA && player != null && player.level().purpurConfig.elytraIgnoreUnbreaking) ? 0 : // Purpur
                     amount = EnchantmentHelper.processDurabilityChange(world, this, amount);
                     // CraftBukkit start
                     if (player instanceof ServerPlayer serverPlayer) { // Paper - Add EntityDamageItemEvent
@@ -740,6 +741,12 @@ public final class ItemStack implements DataComponentHolder {
             }
 
             this.hurtAndBreak(amount, worldserver, entity, (item) -> { // Paper - Add EntityDamageItemEvent
+                // Purpur start - TODO: 1-21: check later
+                // if (item == Items.ELYTRA) {
+                //     setDamageValue(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 f1b2d388a1a40a1d909a2e726f32d6c15e1eb0eb..4934bae61114b49a9f8d0ed044fbb881210df32a 100644
--- a/src/main/java/net/minecraft/world/item/TridentItem.java
+++ b/src/main/java/net/minecraft/world/item/TridentItem.java
@@ -127,6 +127,14 @@ public class TridentItem extends Item implements ProjectileItem {
                             f4 *= f / f6;
                             f5 *= f / f6;
                             org.bukkit.craftbukkit.event.CraftEventFactory.callPlayerRiptideEvent(entityhuman, stack, f3, f4, f5); // CraftBukkit
+
+                            // Purpur start
+                            ItemStack chestItem = entityhuman.getItemBySlot(EquipmentSlot.CHEST);
+                            if (chestItem.getItem() == Items.ELYTRA && world.purpurConfig.elytraDamagePerTridentBoost > 0) {
+                                chestItem.hurtAndBreak(world.purpurConfig.elytraDamagePerTridentBoost, entityhuman, EquipmentSlot.CHEST);
+                            }
+                            // Purpur end
+
                             entityhuman.push((double) f3, (double) f4, (double) f5);
                             entityhuman.startAutoSpinAttack(20, 8.0F, stack);
                             if (entityhuman.onGround()) {
diff --git a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
index 9c87144050ed62ca030e51ae08d8a977e935ba68..e408d9753b6e2bae9bf276e60c3670654ab4782f 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;