Add player elytra boost API

Spigot-API-Patches/0230-Player-elytra-boost-API.patch

@@ -0,0 +1,30 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Trigary <trigary0@gmail.com>
+Date: Tue, 14 Apr 2020 12:06:14 +0200
+Subject: [PATCH] Player elytra boost API
+
+
+diff --git a/src/main/java/org/bukkit/entity/Player.java b/src/main/java/org/bukkit/entity/Player.java
+index 991f757a89d2e917186bb152a2f92bad8b6c2897..16bdb4b717368d121e84121f85bbf3de5fb642f1 100644
+--- a/src/main/java/org/bukkit/entity/Player.java
++++ b/src/main/java/org/bukkit/entity/Player.java
+@@ -1777,6 +1777,19 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
+      */
+     @NotNull
+     <T> T getClientOption(@NotNull ClientOption<T> option);
++
++    /**
++     * Boost a Player that's {@link #isGliding()} using a {@link Firework}.
++     * If the creation of the entity is cancelled, no boosting is done.
++     * This method does not fire {@link com.destroystokyo.paper.event.player.PlayerElytraBoostEvent}.
++     *
++     * @param firework The {@link Material#FIREWORK_ROCKET} to boost the player with
++     * @return The {@link Firework} boosting the Player or null if the spawning of the entity was cancelled
++     * @throws IllegalArgumentException if {@link #isGliding()} is false
++     * or if the {@code firework} isn't a {@link Material#FIREWORK_ROCKET}
++     */
++    @Nullable
++    Firework boostElytra(@NotNull ItemStack firework);
+     // Paper end
+ 
+     // Spigot start

Spigot-Server-Patches/0592-Player-elytra-boost-API.patch

@@ -0,0 +1,31 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Trigary <trigary0@gmail.com>
+Date: Tue, 14 Apr 2020 12:05:22 +0200
+Subject: [PATCH] Player elytra boost API
+
+
+diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+index fb1852ea6bf6997771a3522079bf3a32ebca357c..9f04172fb28b89f57515191204c62148d14e0034 100644
+--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
++++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+@@ -2086,6 +2086,20 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
+         }
+         throw new RuntimeException("Unknown settings type");
+     }
++
++    @Override
++    public org.bukkit.entity.Firework boostElytra(ItemStack firework) {
++        Validate.isTrue(isGliding(), "Player must be gliding");
++        Validate.isTrue(firework != null, "firework == null");
++        Validate.isTrue(firework.getType() == Material.FIREWORK_ROCKET, "Firework must be Material.FIREWORK_ROCKET");
++
++        net.minecraft.server.ItemStack item = org.bukkit.craftbukkit.inventory.CraftItemStack.asNMSCopy(firework);
++        net.minecraft.server.World world = ((CraftWorld) getWorld()).getHandle();
++        net.minecraft.server.EntityFireworks entity = new net.minecraft.server.EntityFireworks(world, item, getHandle());
++        return world.addEntity(entity)
++            ? (org.bukkit.entity.Firework) entity.getBukkitEntity()
++            : null;
++    }
+     // Paper end
+ 
+     // Spigot start