From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: BillyGalbreath <Blake.Galbreath@GMail.com>
Date: Sat, 21 Jul 2018 01:59:59 -0500
Subject: [PATCH] PlayerElytraBoostEvent


diff --git a/src/main/java/net/minecraft/world/entity/projectile/Projectile.java b/src/main/java/net/minecraft/world/entity/projectile/Projectile.java
index 46eff02aa250890485d58a10e76d571052086aa8..fd8afa4b12d66d1e0a789cef41ca77c45c64e2e8 100644
--- a/src/main/java/net/minecraft/world/entity/projectile/Projectile.java
+++ b/src/main/java/net/minecraft/world/entity/projectile/Projectile.java
@@ -219,11 +219,34 @@ public abstract class Projectile extends Entity implements TraceableEntity {
         });
     }
 
+    // Paper start - delayed projectile spawning
+    public record Delayed<T extends Projectile>(
+        T projectile,
+        ServerLevel world,
+        ItemStack projectileStack
+    ) {
+        // Taken from net.minecraft.world.entity.projectile.Projectile.spawnProjectile(T, net.minecraft.server.level.ServerLevel, net.minecraft.world.item.ItemStack, java.util.function.Consumer<T>)
+        public boolean attemptSpawn() {
+            if (!world.addFreshEntity(projectile)) return false;
+            projectile.applyOnProjectileSpawned(this.world, this.projectileStack);
+            return true;
+        }
+
+        public T spawn() {
+            this.attemptSpawn();
+            return projectile();
+        }
+    }
+    // Paper end - delayed projectile spawning
+
     public static <T extends Projectile> T spawnProjectile(T projectile, ServerLevel world, ItemStack projectileStack, Consumer<T> beforeSpawn) {
+    // Paper start - delayed projectile spawning
+        return spawnProjectileDelayed(projectile, world, projectileStack, beforeSpawn).spawn();
+    }
+    public static <T extends Projectile> Delayed<T> spawnProjectileDelayed(T projectile, ServerLevel world, ItemStack projectileStack, Consumer<T> beforeSpawn) {
+    // Paper end - delayed projectile spawning
         beforeSpawn.accept(projectile);
-        if (world.addFreshEntity(projectile)) // CraftBukkit
-        projectile.applyOnProjectileSpawned(world, projectileStack);
-        return projectile;
+        return new Delayed<>(projectile, world, projectileStack); // Paper - delayed projectile spawning
     }
 
     public void applyOnProjectileSpawned(ServerLevel world, ItemStack projectileStack) {
diff --git a/src/main/java/net/minecraft/world/item/FireworkRocketItem.java b/src/main/java/net/minecraft/world/item/FireworkRocketItem.java
index 3929cb76f1c98c0a22eb2ab64c2ed09805ffe448..400ad0fa1d07c8b120e3c3b5488dfa315aa2d23f 100644
--- a/src/main/java/net/minecraft/world/item/FireworkRocketItem.java
+++ b/src/main/java/net/minecraft/world/item/FireworkRocketItem.java
@@ -56,9 +56,19 @@ public class FireworkRocketItem extends Item implements ProjectileItem {
         if (user.isFallFlying()) {
             ItemStack itemStack = user.getItemInHand(hand);
             if (world instanceof ServerLevel serverLevel) {
-                Projectile.spawnProjectile(new FireworkRocketEntity(world, itemStack, user), serverLevel, itemStack, f -> f.spawningEntity = user.getUUID());  // Paper - firework api - assign spawning entity uuid
-                itemStack.consume(1, user);
-                user.awardStat(Stats.ITEM_USED.get(this));
+                // Paper start - PlayerElytraBoostEvent
+                final Projectile.Delayed<FireworkRocketEntity> delayed = Projectile.spawnProjectileDelayed(new FireworkRocketEntity(world, itemStack, user), serverLevel, itemStack, f -> f.spawningEntity = user.getUUID());  // Paper - firework api - assign spawning entity uuid
+                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) delayed.projectile().getBukkitEntity(), org.bukkit.craftbukkit.CraftEquipmentSlot.getHand(hand));
+                if (event.callEvent() && delayed.attemptSpawn()) {
+                    user.awardStat(Stats.ITEM_USED.get(this)); // Moved up from below
+                    if (event.shouldConsume() && !user.hasInfiniteMaterials()) {
+                        itemStack.shrink(1); // Moved up from below
+                    } else ((net.minecraft.server.level.ServerPlayer) user).getBukkitEntity().updateInventory();
+                } else {
+                    ((net.minecraft.server.level.ServerPlayer) user).getBukkitEntity().updateInventory();
+                }
+                // Moved up consume/stat
+                // Paper end - PlayerElytraBoostEvent
             }
 
             return InteractionResult.SUCCESS;