Adds level calculation on login option.

https://github.com/BentoBoxWorld/Level/issues/36

src/main/java/world/bentobox/level/Level.java

@@ -5,6 +5,7 @@ import java.util.Map;
 import java.util.UUID;
 
 import org.bukkit.World;
+import org.eclipse.jdt.annotation.Nullable;
 
 import world.bentobox.bentobox.api.addons.Addon;
 import world.bentobox.bentobox.api.user.User;
@@ -54,7 +55,7 @@ public class Level extends Addon {
      * @param user - the user who is asking, or null if none
      * @param playerUUID - the target island member's UUID
      */
-    public void calculateIslandLevel(World world, User user, UUID playerUUID) {
+    public void calculateIslandLevel(World world, @Nullable User user, UUID playerUUID) {
         levelCalc.calculateIslandLevel(world, user, playerUUID);
     }
 
@@ -208,7 +209,7 @@ public class Level extends Addon {
     public long getInitialIslandLevel(Island island) {
         return levelsCache.containsKey(island.getOwner()) ? levelsCache.get(island.getOwner()).getInitialLevel(island.getWorld()) : 0L;
     }
-    
+
     public Database<LevelsData> getHandler() {
         return handler;
     }

src/main/java/world/bentobox/level/LevelPresenter.java

@@ -41,16 +41,18 @@ class LevelPresenter {
                 targetPlayer = plugin.getIslands().getOwner(world, targetPlayer);
                 inTeam = true;
             } else {
-                sender.sendMessage("general.errors.player-has-no-island");
+                if (sender != null) sender.sendMessage("general.errors.player-has-no-island");
                 return;
             }
         }
         // Player asking for their own island calc
-        if (inTeam || !sender.isPlayer() || sender.getUniqueId().equals(targetPlayer) || sender.isOp() || sender.hasPermission(permPrefix + "mod.info")) {
+        if (sender == null || inTeam || !sender.isPlayer() || sender.getUniqueId().equals(targetPlayer) || sender.isOp() || sender.hasPermission(permPrefix + "mod.info")) {
             // Newer better system - uses chunks
-            if (!onLevelWaitTime(sender) || levelWait <= 0 || sender.isOp() || sender.hasPermission(permPrefix + "mod.info")) {
-                sender.sendMessage("island.level.calculating");
-                setLevelWaitTime(sender);
+            if (sender == null || !onLevelWaitTime(sender) || levelWait <= 0 || sender.isOp() || sender.hasPermission(permPrefix + "mod.info")) {
+                if (sender != null) {
+                    sender.sendMessage("island.level.calculating");
+                    setLevelWaitTime(sender);
+                }
                 new PlayerLevel(addon, plugin.getIslands().getIsland(world, targetPlayer), targetPlayer, sender);
             } else {
                 // Cooldown

src/main/java/world/bentobox/level/calculators/PlayerLevel.java

@@ -5,6 +5,7 @@ import java.util.Map;
 import java.util.UUID;
 
 import org.bukkit.World;
+import org.eclipse.jdt.annotation.Nullable;
 
 import world.bentobox.bentobox.api.events.addon.AddonEvent;
 import world.bentobox.bentobox.api.user.User;
@@ -34,7 +35,7 @@ public class PlayerLevel {
     private CalcIslandLevel calc;
 
 
-    public PlayerLevel(final Level addon, final Island island, final UUID targetPlayer, final User asker) {
+    public PlayerLevel(final Level addon, final Island island, final UUID targetPlayer, @Nullable final User asker) {
         this.addon = addon;
         this.island = island;
         this.world = island.getCenter().getWorld();
@@ -70,7 +71,7 @@ public class PlayerLevel {
         // Save the results
         island.getMemberSet().forEach(m -> addon.setIslandLevel(world, m, results.getLevel()));
         // Display result if event is not cancelled
-        if (!ilce.isCancelled()) {
+        if (!ilce.isCancelled() && asker != null) {
             informPlayers(results);
         }
     }

src/main/java/world/bentobox/level/commands/admin/AdminLevelCommand.java

@@ -13,11 +13,11 @@ import world.bentobox.level.Level;
 
 public class AdminLevelCommand extends CompositeCommand {
 
-    private final Level levelPlugin;
+    private final Level addon;
 
-    public AdminLevelCommand(Level levelPlugin, CompositeCommand parent) {
+    public AdminLevelCommand(Level addon, CompositeCommand parent) {
         super(parent, "level");
-        this.levelPlugin = levelPlugin;
+        this.addon = addon;
     }
 
     @Override
@@ -38,7 +38,7 @@ public class AdminLevelCommand extends CompositeCommand {
                 user.sendMessage("general.errors.unknown-player", TextVariables.NAME, args.get(0));
                 return true;
             } else {
-                levelPlugin.calculateIslandLevel(getWorld(), user, playerUUID);
+                addon.calculateIslandLevel(getWorld(), user, playerUUID);
             }
             return true;
         } else {

src/main/java/world/bentobox/level/config/Settings.java

@@ -205,4 +205,11 @@ public class Settings {
         return level.getConfig().getBoolean("end");
     }
 
+    /**
+     * @return true if level should be calculated on login
+     */
+    public boolean isLogin() {
+        return level.getConfig().getBoolean("login");
+    }
+
 }

src/main/java/world/bentobox/level/listeners/JoinLeaveListener.java

@@ -28,6 +28,14 @@ public class JoinLeaveListener implements Listener {
     public void onPlayerJoin(PlayerJoinEvent e) {
         // Load player into cache
         addon.getLevelsData(e.getPlayer().getUniqueId());
+        // If level calc on login is enabled, run through all the worlds and calculate the level
+        if (addon.getSettings().isLogin()) {
+            addon.getPlugin().getAddonsManager().getGameModeAddons().stream()
+            .filter(gm -> addon.getSettings().getGameModes().contains(gm.getDescription().getName()))
+            .forEach(gm -> {
+                addon.calculateIslandLevel(gm.getOverWorld(), null, e.getPlayer().getUniqueId());
+            });
+        }
     }
 
     @EventHandler(priority = EventPriority.NORMAL, ignoreCancelled = true)

src/main/resources/config.yml

@@ -14,6 +14,11 @@ game-modes:
 # Players with the permission askyblock.island.multiplier.# will have their blocks
 # multiplied in value by that amount.
 
+# Calculate island level on login
+# This silently calculates the player's island level when they login
+# This applies to all islands the player has on the server, e.g., BSkyBlock, AcidIsland
+login: false
+
 # Include nether island in level calculations.
 # Warning: Enabling this mid-game will give players with an island a jump in
 # island level. New islands will be correctly zeroed.