Fix issue when completing challenge was not displayed in ChallengesGUI. (#60)

src/main/java/world/bentobox/challenges/panel/ChallengesPanels2.java

@@ -152,7 +152,7 @@ public class ChallengesPanels2 {
         } else {
             // Player click
             itemBuilder.clickHandler((panel, player, c, s) -> {
-                new TryToComplete(addon, player, challenge, world, label, permPrefix);
+                new TryToComplete(addon, player, challenge, world, label, permPrefix).build();
                 return true;
             });
         }

src/main/java/world/bentobox/challenges/panel/TryToComplete.java

@@ -161,8 +161,28 @@ public class TryToComplete
         this.manager = addon.getChallengesManager();
         this.challenge = challenge;
         this.topLabel = topLabel;
+    }
 
-        this.build();
+
+    /**
+     * This static method allows complete challenge and get result about completion.
+     * @param addon - Challenges Addon.
+     * @param user - User who performs challenge.
+     * @param challenge - Challenge that should be completed.
+     * @param world - World where completion may occur.
+     * @param topLabel - Label of the top command.
+     * @param permissionPrefix - Permission prefix for GameMode addon.
+     * @return true, if challenge is completed, otherwise false.
+     */
+    public static boolean complete(ChallengesAddon addon,
+        User user,
+        Challenge challenge,
+        World world,
+        String topLabel,
+        String permissionPrefix)
+    {
+        return new TryToComplete(addon, user, challenge, world, topLabel, permissionPrefix).
+            build().meetsRequirements;
     }
 
 

src/main/java/world/bentobox/challenges/panel/user/ChallengesGUI.java

@@ -325,12 +325,16 @@ public class ChallengesGUI extends CommonGUI
 			name(challenge.getFriendlyName().isEmpty() ? challenge.getUniqueId() : challenge.getFriendlyName()).
 			description(GuiUtils.stringSplit(this.createChallengeDescription(challenge))).
 			clickHandler((panel, user1, clickType, slot) -> {
-				new TryToComplete(this.addon,
+				if (TryToComplete.complete(this.addon,
 					this.user,
 					challenge,
 					this.world,
 					this.topLabel,
-					this.permissionPrefix);
+					this.permissionPrefix))
+				{
+					this.build();
+				}
+
 				return true;
 			}).
 			glow(this.challengesManager.isChallengeComplete(this.user, challenge)).