Fixes inventory item removal bug (for sure this time).

Also saves player data after player completes a challenge or the
challenge is reset. Now reloading challenges doesn't cause challenge
completion loss.

#27
#30

src/main/java/bentobox/addon/challenges/ChallengesAddon.java

@@ -1,18 +1,21 @@
 package bentobox.addon.challenges;
 
 import org.bukkit.Bukkit;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
 
 import bentobox.addon.challenges.commands.ChallengesCommand;
 import bentobox.addon.challenges.commands.admin.Challenges;
 import world.bentobox.bentobox.api.addons.Addon;
 import world.bentobox.bentobox.api.commands.CompositeCommand;
+import world.bentobox.level.event.IslandLevelCalculatedEvent;
 
 /**
  * Add-on to BSkyBlock that enables challenges
  * @author tastybento
  *
  */
-public class ChallengesAddon extends Addon {
+public class ChallengesAddon extends Addon implements Listener {
 
     private ChallengesManager challengesManager;
     private String permissionPrefix = "addon";
@@ -24,9 +27,15 @@ public void onLoad() {
         // Save default config.yml
         saveDefaultConfig();
     }
-
+    @EventHandler
+    public void onIslandLevelChange(IslandLevelCalculatedEvent event)
+    {
+        event.getResults();
+        Bukkit.getLogger().info("DEBUG: event called");
+    }
     @Override
     public void onEnable() {
+        this.registerListener(this);
         // Check if it is enabled - it might be loaded, but not enabled.
         if (getPlugin() == null || !getPlugin().isEnabled()) {
             Bukkit.getLogger().severe("BentoBox is not available or disabled!");

src/main/java/bentobox/addon/challenges/ChallengesManager.java

@@ -372,9 +372,19 @@ private void save() {
             lvConfig.saveConfigObject(en.getKey());
             en.getValue().forEach(chConfig::saveConfigObject);
         });
+        savePlayers();
+    }
+
+    private void savePlayers() {
         playerData.values().forEach(players :: saveObject);
     }
 
+    private void savePlayer(UUID playerUUID) {
+        if (playerData.containsKey(playerUUID)) {
+            players.saveObject(playerData.get(playerUUID));
+        }
+    }
+
     /**
      * Save to the database
      * @param async - if true, saving will be done async
@@ -396,6 +406,8 @@ public void save(boolean async) {
     public void setChallengeComplete(User user, String challengeUniqueId, World world) {
         addPlayer(user);
         playerData.get(user.getUniqueId()).setChallengeDone(world, challengeUniqueId);
+        // Save
+        savePlayer(user.getUniqueId());
     }
 
     /**
@@ -407,7 +419,8 @@ public void setChallengeComplete(User user, String challengeUniqueId, World worl
     public void setResetChallenge(User user, String challengeUniqueId, World world) {
         addPlayer(user);
         playerData.get(user.getUniqueId()).setChallengeTimes(world, challengeUniqueId, 0);
-
+        // Save
+        savePlayer(user.getUniqueId());
     }
 
     /**

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

@@ -261,17 +261,21 @@ public Map<Material, Integer> removeItems(List<ItemStack> required) {
             for (ItemStack i : itemsInInv) {
                 if (amountToBeRemoved > 0) {
                     // Remove either the full amount or the remaining amount
-                    i.setAmount(Math.min(i.getAmount(), amountToBeRemoved));
-                    // Remove all of this item
-                    HashMap<Integer, ItemStack> remaining = user.getInventory().removeItem(i);
-                    if (!remaining.isEmpty()) {
-                        remaining.forEach((k,v) -> addon.logError("Could not remove items: " + v.getType() + " x " + v.getAmount()));
+                    if (i.getAmount() >= amountToBeRemoved) {
+                        i.setAmount(i.getAmount() - amountToBeRemoved);
+                        removed.merge(i.getType(), amountToBeRemoved, Integer::sum);
+                        amountToBeRemoved = 0;
                     } else {
-                        amountToBeRemoved -= i.getAmount();
                         removed.merge(i.getType(), i.getAmount(), Integer::sum);
+                        amountToBeRemoved -= i.getAmount();
+                        i.setAmount(0);
+
                     }
                 }
             }
+            if (amountToBeRemoved > 0) {
+                addon.logError("Could not remove " + amountToBeRemoved + " of " + req.getType() + " from player's inventory!");
+            }
         }
         return removed;
     }

src/test/java/bentobox/addon/challenges/panel/TryToCompleteTest.java

@@ -8,7 +8,6 @@
 import static org.mockito.Mockito.when;
 
 import java.util.ArrayList;
-import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
@@ -153,14 +152,13 @@ public void testRemoveItemsMultipleOtherFail() {
      */
     @Test
     public void testRemoveItemsFail() {
-        HashMap<Integer, ItemStack> unremovable = new HashMap<>();
-        unremovable.put(0, new ItemStack(Material.GOLD_BLOCK, 2));
-        when(inv.removeItem(Mockito.any(ItemStack.class))).thenReturn(unremovable);
-        required.add(new ItemStack(Material.GOLD_BLOCK, 5));
+        required.add(new ItemStack(Material.GOLD_BLOCK, 55));
         TryToComplete x = new TryToComplete(addon);
         x.user(user);
         Map<Material, Integer> removed = x.removeItems(required);
-        assertTrue(removed.isEmpty());
+        // It will remove 32, but not any more
+        assertTrue(removed.get(Material.GOLD_BLOCK) == 32);
+        // An error will be thrown
         Mockito.verify(addon, Mockito.times(1)).logError(Mockito.anyString());
     }
 }