From fa03ea06694f6a90f698e42b30dfb61bd1bced8f Mon Sep 17 00:00:00 2001
From: BONNe <bonne@bonne.id.lv>
Date: Tue, 5 Feb 2019 08:43:58 +0200
Subject: [PATCH] Fix issue when users could open challenges gui, even if
 challenges in that world does not exist (#69)

---
 .../bentobox/challenges/panel/user/ChallengesGUI.java     | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/main/java/world/bentobox/challenges/panel/user/ChallengesGUI.java b/src/main/java/world/bentobox/challenges/panel/user/ChallengesGUI.java
index 223876f..bca04af 100644
--- a/src/main/java/world/bentobox/challenges/panel/user/ChallengesGUI.java
+++ b/src/main/java/world/bentobox/challenges/panel/user/ChallengesGUI.java
@@ -73,6 +73,14 @@ public class ChallengesGUI extends CommonGUI
 	@Override
 	public void build()
 	{
+		// Do not open gui if there is no challenges.
+		if (this.challengesManager.getAllChallenges(this.world).isEmpty())
+		{
+			this.addon.getLogger().severe("There are no challenges set up!");
+			this.user.sendMessage("general.errors.general");
+			return;
+		}
+
 		PanelBuilder panelBuilder = new PanelBuilder().user(this.user).
 			name(this.user.getTranslation("challenges.gui.title"));