Add whitelist events

paper-server/patches/sources/net/minecraft/server/players/UserWhiteList.java.patch

@@ -0,0 +1,26 @@
+--- a/net/minecraft/server/players/UserWhiteList.java
++++ b/net/minecraft/server/players/UserWhiteList.java
+@@ -28,4 +28,23 @@
+     protected String getKeyForUser(GameProfile gameProfile) {
+         return gameProfile.getId().toString();
+     }
++    // Paper start - Add whitelist events
++    @Override
++    public void add(UserWhiteListEntry entry) {
++        if (!new io.papermc.paper.event.server.WhitelistStateUpdateEvent(com.destroystokyo.paper.profile.CraftPlayerProfile.asBukkitCopy(entry.getUser()), io.papermc.paper.event.server.WhitelistStateUpdateEvent.WhitelistStatus.ADDED).callEvent()) {
++            return;
++        }
++
++        super.add(entry);
++    }
++
++    @Override
++    public void remove(GameProfile profile) {
++        if (!new io.papermc.paper.event.server.WhitelistStateUpdateEvent(com.destroystokyo.paper.profile.CraftPlayerProfile.asBukkitCopy(profile), io.papermc.paper.event.server.WhitelistStateUpdateEvent.WhitelistStatus.REMOVED).callEvent()) {
++            return;
++        }
++
++        super.remove(profile);
++    }
++    // Paper end - Add whitelist events
+ }