Add PlayerResourcePackStatusEvent.

This event is called when the server received status updates about the progress of a resource pack which it attempted to send to the client.

By: Adam Thomas <aet2505@gmail.com>

paper-api/src/main/java/org/bukkit/event/player/PlayerResourcePackStatusEvent.java

@@ -0,0 +1,61 @@
+package org.bukkit.event.player;
+
+import org.bukkit.entity.Player;
+import org.bukkit.event.HandlerList;
+
+/**
+ * Called when a player takes action on a resource pack request sent via
+ * {@link Player#setResourcePack(java.lang.String)}.
+ */
+public class PlayerResourcePackStatusEvent extends PlayerEvent {
+
+    private static final HandlerList handlers = new HandlerList();
+    private final Status status;
+
+    public PlayerResourcePackStatusEvent(final Player who, Status resourcePackStatus) {
+        super(who);
+        this.status = resourcePackStatus;
+    }
+
+    /**
+     * Gets the status of this pack.
+     *
+     * @return the current status
+     */
+    public Status getStatus() {
+        return status;
+    }
+
+    @Override
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
+
+    /**
+     * Status of the resource pack.
+     */
+    public enum Status {
+
+        /**
+         * The resource pack has been successfully downloaded and applied to the
+         * client.
+         */
+        SUCCESSFULLY_LOADED,
+        /**
+         * The client refused to accept the resource pack.
+         */
+        DECLINED,
+        /**
+         * The client accepted the pack, but download failed.
+         */
+        FAILED_DOWNLOAD,
+        /**
+         * The client accepted the pack and is beginning a download of it.
+         */
+        ACCEPTED;
+    }
+}