Add inventory check and confirmation for island teleportation.

- Introduced inventory validation to prevent accidental item loss.
- Added `/skyblock confirm` command for explicit teleport confirmation.

src/main/java/com/ncguy/usefulskyblock/command/SkyblockGenCommand.java

@@ -13,7 +13,6 @@ import com.ncguy.usefulskyblock.IslandNetworkGenerator;
 import com.ncguy.usefulskyblock.Reference;
 import com.ncguy.usefulskyblock.StructureRef;
 import com.ncguy.usefulskyblock.data.BiomedStructure;
-import com.ncguy.usefulskyblock.utils.MathsUtils;
 import com.ncguy.usefulskyblock.utils.TextUtils;
 import io.papermc.paper.command.brigadier.CommandSourceStack;
 import io.papermc.paper.command.brigadier.Commands;
@@ -30,6 +29,7 @@ import org.bukkit.block.structure.StructureRotation;
 import org.bukkit.entity.Entity;
 import org.bukkit.entity.Player;
 import org.bukkit.event.player.PlayerTeleportEvent;
+import org.bukkit.inventory.PlayerInventory;
 import org.bukkit.scoreboard.Scoreboard;
 import org.bukkit.scoreboard.ScoreboardManager;
 import org.bukkit.scoreboard.Team;
@@ -37,6 +37,7 @@ import org.bukkit.util.BlockVector;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import java.util.Arrays;
 import java.util.Objects;
 import java.util.Optional;
 import java.util.Set;
@@ -217,22 +218,26 @@ public class SkyblockGenCommand extends AbstractSkyblockCommand {
         return gen.generateIslandNetwork(origin, def);
     }
 
-    private int executeRoot(CommandContext<CommandSourceStack> ctx) {
+    private int executeRoot(CommandContext<CommandSourceStack> ctx, boolean confirmationGiven) {
         Entity executor = ctx.getSource().getExecutor();
         if (!(executor instanceof Player)) return 0;
 
         Player player = (Player) executor;
         var islandHomeLoc = Reference.ISLAND_HOME_LOC.assign(player);
-
         World overworld = getServer().getWorld(new NamespacedKey("minecraft", "overworld"));
 
         if (islandHomeLoc.has()) {
+
+            if (!isInventoryEmpty(confirmationGiven, executor, player))
+                return -1;
+
             BlockVector blockVector = islandHomeLoc.get();
             Location loc = new Location(overworld, blockVector.getX(), blockVector.getY(), blockVector.getZ());
             if (!player.teleport(loc, PlayerTeleportEvent.TeleportCause.COMMAND)) {
                 player.sendMessage("Failed to teleport you to your island home, please notify an administrator");
                 return -1;
             }
+            player.getInventory().clear();
             return 0;
         }
 
@@ -250,6 +255,10 @@ public class SkyblockGenCommand extends AbstractSkyblockCommand {
         String sanitizedTeamName = playerTeamName.replaceAll("[^a-z0-9_.]", "_");
         var teamSpawn = Reference.SKYBLOCK_TEAM_ROOT.withSuffix("." + sanitizedTeamName).assign(overworld);
         if (teamSpawn.has()) {
+
+            if (!isInventoryEmpty(confirmationGiven, executor, player))
+                return -1;
+
             islandHomeLoc.set(teamSpawn.get());
             executor.sendMessage("Teleported to island home..");
             BlockVector blockVector = islandHomeLoc.get();
@@ -258,6 +267,7 @@ public class SkyblockGenCommand extends AbstractSkyblockCommand {
                 player.sendMessage("Failed to teleport you to your island home, please notify an administrator");
                 return -1;
             }
+            player.getInventory().clear();
             return 0;
         }
 
@@ -268,6 +278,22 @@ public class SkyblockGenCommand extends AbstractSkyblockCommand {
         return 0;
     }
 
+    private boolean isInventoryEmpty(boolean confirmationGiven, Entity executor, Player player) {
+        PlayerInventory inventory = player.getInventory();
+        boolean hasArmour = Arrays.stream(inventory.getArmorContents()).anyMatch(Objects::nonNull);
+        boolean hasItemInOffhand = inventory.getItemInOffHand().getType() != Material.AIR;
+        boolean hasItemInInventory = Arrays.stream(inventory.getContents()).anyMatch(Objects::nonNull);
+
+        if(hasArmour || hasItemInOffhand || hasItemInInventory) {
+            if(!confirmationGiven) {
+                executor.sendMessage(Component.text("You have items in your inventory, teleporting you to your island will remove them."));
+                executor.sendMessage(Component.text("If you wish to keep your items, please confirm via the command ").append(Component.text("/skyblock confirm", Style.style(TextColor.color(0x00, 0xff, 0xff)))));
+                return false;
+            }
+        }
+        return true;
+    }
+
     public static LiteralCommandNode<CommandSourceStack> create() {
         var root = Commands.literal("skyblock");
 
@@ -295,11 +321,20 @@ public class SkyblockGenCommand extends AbstractSkyblockCommand {
                                         .executes(cmd::executeTeamRemove)));
 
         root.then(team);
-        root.executes(cmd::executeRoot);
+        root.executes(cmd::executeRootNoConfirm);
+        root.then(Commands.literal("confirm").executes(cmd::executeRootConfirm));
 
         return root.build();
     }
 
+    private int executeRootConfirm(CommandContext<CommandSourceStack> ctx) {
+        return executeRoot(ctx, true);
+    }
+
+    private int executeRootNoConfirm(CommandContext<CommandSourceStack> ctx) {
+        return executeRoot(ctx, false);
+    }
+
     private int executeGetProgress(CommandContext<CommandSourceStack> ctx) {
         Entity executor = ctx.getSource().getExecutor();
         if (!(executor instanceof Player player)) return -1;