Refactor ResourcePacks handling (#1225)

* Initial ResourcePack refactor

* Implement sendResourcePacks method

* Initializes the ResourcePackHandler at player initialization

* Move adventure to velocity resource pack conversion to the same class

* Added some internal resource pack documentation

* Refactored Modern ResourcePack handling

* Handle RemoveResourcePackPacket from backend server

* Fixed license

* Use removeIf instead of manual iteration

* Improve ModernResourcePackHandler

* fix hash conversion

* bundle resource packs

* keep old constructors of PlayerResourcePackStatusEvent

* add @Nullable to PlayerResourcePackStatusEvent#getPackId

* Use a single instance of BundleDelimiterPacket

* Throw UnSupportedOperationException on operations not supported by LegacyResourcePackHandler

* Use a single instance on empty packets

* Handle active packet bundle sending from backend server in case of sending a packet bundle of resource packs

* Improve packet bundling

* Fixed login for players with version 1.20.2

---------

Co-authored-by: Gero <gecam59@gmail.com>

api/src/main/java/com/velocitypowered/api/event/player/PlayerResourcePackStatusEvent.java

@@ -12,6 +12,7 @@ import com.velocitypowered.api.event.annotation.AwaitingEvent;
 import com.velocitypowered.api.network.ProtocolVersion;
 import com.velocitypowered.api.proxy.Player;
 import com.velocitypowered.api.proxy.player.ResourcePackInfo;
+import java.util.UUID;
 import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
@@ -24,6 +25,7 @@ import org.checkerframework.checker.nullness.qual.Nullable;
 public class PlayerResourcePackStatusEvent {
 
   private final Player player;
+  private final @MonotonicNonNull UUID packId;
   private final Status status;
   private final @MonotonicNonNull ResourcePackInfo packInfo;
   private boolean overwriteKick;
@@ -32,20 +34,31 @@ public class PlayerResourcePackStatusEvent {
    * Instantiates this event.
    *
    * @deprecated Use {@link PlayerResourcePackStatusEvent#PlayerResourcePackStatusEvent
-   *             (Player, Status, ResourcePackInfo)} instead.
+   *             (Player, UUID, Status, ResourcePackInfo)} instead.
    */
   @Deprecated
   public PlayerResourcePackStatusEvent(Player player, Status status) {
-    this.player = Preconditions.checkNotNull(player, "player");
-    this.status = Preconditions.checkNotNull(status, "status");
-    this.packInfo = null;
+    this(player, null, status, null);
+  }
+
+  /**
+   * Instantiates this event.
+   *
+   * @deprecated Use {@link PlayerResourcePackStatusEvent#PlayerResourcePackStatusEvent
+   *             (Player, UUID, Status, ResourcePackInfo)} instead.
+   */
+  @Deprecated
+  public PlayerResourcePackStatusEvent(Player player, Status status, ResourcePackInfo packInfo) {
+    this(player, null, status, packInfo);
   }
 
   /**
    * Instantiates this event.
    */
-  public PlayerResourcePackStatusEvent(Player player, Status status, ResourcePackInfo packInfo) {
+  public PlayerResourcePackStatusEvent(
+          Player player, UUID packId, Status status, ResourcePackInfo packInfo) {
     this.player = Preconditions.checkNotNull(player, "player");
+    this.packId = packId == null ? packInfo == null ? null : packInfo.getId() : packId;
     this.status = Preconditions.checkNotNull(status, "status");
     this.packInfo = packInfo;
   }
@@ -59,6 +72,16 @@ public class PlayerResourcePackStatusEvent {
     return player;
   }
 
+  /**
+   * Returns the id of the resource pack.
+   *
+   * @return the id
+   */
+  @Nullable
+  public UUID getPackId() {
+    return packId;
+  }
+
   /**
    * Returns the new status for the resource pack.
    *

api/src/main/java/com/velocitypowered/api/proxy/player/ResourcePackInfo.java

@@ -8,13 +8,14 @@
 package com.velocitypowered.api.proxy.player;
 
 import java.util.UUID;
+import net.kyori.adventure.resource.ResourcePackRequestLike;
 import net.kyori.adventure.text.Component;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
 /**
  * Represents the information for a resource pack to apply that can be sent to the client.
  */
-public interface ResourcePackInfo {
+public interface ResourcePackInfo extends ResourcePackRequestLike {
 
   /**
    * Gets the id of this resource-pack.