improve mailbox

src/main/java/cat/nyaa/HamsterEcoHelper/Events.java

@@ -10,13 +10,15 @@
 import org.bukkit.event.inventory.InventoryCloseEvent;
 import org.bukkit.event.player.PlayerJoinEvent;
 import org.bukkit.inventory.ItemStack;
+import org.bukkit.scheduler.BukkitRunnable;
 
 import java.util.HashMap;
 import java.util.List;
 import java.util.UUID;
 
 public class Events implements Listener {
     private final HamsterEcoHelper plugin;
+
     public Events(HamsterEcoHelper plugin) {
         this.plugin = plugin;
         plugin.getServer().getPluginManager().registerEvents(this, plugin);
@@ -28,6 +30,9 @@ public void onInventoryClose(InventoryCloseEvent e) {
         if (MarketManager.viewMailbox.contains(player)) {
             MarketManager.viewMailbox.remove(player);
             MarketManager.setMailbox(player, e.getInventory().getContents());
+            if (MarketManager.viewPage.get(player) != null) {
+                new openMarket(player, MarketManager.viewPage.get(player), MarketManager.viewSeller.get(player)).runTaskLater(this.plugin, 5);
+            }
             return;
         }
     }
@@ -79,3 +84,25 @@ public void onPlayerJoin(PlayerJoinEvent ev) {
         }
     }
 }
+
+class openMarket extends BukkitRunnable {
+
+    private final UUID seller;
+    private final int page;
+    private final Player player;
+
+    public openMarket(Player player, int page, UUID seller) {
+        this.player = player;
+        this.page = page;
+        this.seller = seller;
+    }
+
+    @Override
+    public void run() {
+        if (player.isOnline()) {
+            MarketManager.openGUI(player, page, seller);
+        }
+        this.cancel();
+    }
+
+}

src/main/java/cat/nyaa/HamsterEcoHelper/market/MarketCommands.java

@@ -18,6 +18,7 @@ public class MarketCommands {
     @SubCommand(value = "mailbox", permission = "heh.user")
     public static void openMailbox(CommandSender sender, Arguments args, HamsterEcoHelper plugin) {
         Player player = asPlayer(sender);
+        MarketManager.viewPage.put(player,null);
         MarketManager.openMailbox(player);
     }