Make ScriptListener.ScriptExecutor.player final

Make ScriptListener.ScriptExecutor.commands final
Fixing commands without spaces
Fixing negative and zero sleepTime
Add Error message on sleep without number
Remove throw-away-references

BauSystem_Main/src/de/steamwar/bausystem/world/ScriptListener.java

@@ -32,17 +32,40 @@ import org.bukkit.inventory.ItemStack;
 import org.bukkit.inventory.meta.BookMeta;
 
 import java.util.ArrayList;
-import java.util.HashMap;
 import java.util.List;
-import java.util.Map;
 import java.util.logging.Level;
 
 public class ScriptListener implements Listener {
 
+    private static final String scriptPrefix = "§eScriptSystem§8» §7";
+
+    @EventHandler
+    public void onLeftClick(PlayerInteractEvent event) {
+        if(event.getAction() != Action.LEFT_CLICK_AIR && event.getAction() != Action.LEFT_CLICK_BLOCK)
+            return;
+
+        ItemStack item = event.getItem();
+        if(item == null || isNoBook(item) || item.getItemMeta() == null)
+            return;
+
+        event.setCancelled(true);
+        new ScriptExecutor((BookMeta) item.getItemMeta(), event.getPlayer());
+    }
+
+    private boolean isNoBook(ItemStack item){
+        switch(Core.getVersion()){
+            case 12:
+                return ScriptListener_12.isNoBook(item);
+            case 15:
+            default:
+                return ScriptListener_15.isNoBook(item);
+        }
+    }
+
     private static class ScriptExecutor {
 
-        private Player player;
-        private List<String> commands = new ArrayList<>();
+        private final Player player;
+        private final List<String> commands = new ArrayList<>();
         private int index = 0;
 
         public ScriptExecutor(BookMeta bookMeta, Player player) {
@@ -59,14 +82,13 @@ public class ScriptListener implements Listener {
 
         private void resume() {
             if (!player.isOnline()) {
-                player = null;
-                commands = null;
                 return;
             }
 
             while (index < commands.size()) {
                 String command = commands.get(index++);
 
+                if (command.contains(" ")) {
                     String[] strings = command.split(" ");
                     if (strings.length > 0) {
                         if (strings[0].equalsIgnoreCase("sleep")) {
@@ -74,14 +96,16 @@ public class ScriptListener implements Listener {
                             if (strings.length > 1) {
                                 try {
                                     sleepTime = Integer.parseInt(strings[1]);
+                                    if (sleepTime <= 0) sleepTime = 1;
                                 } catch (NumberFormatException e) {
-                                // Ignored
+                                    player.sendMessage(scriptPrefix + "Sleep ohne Zahl, default 1 GameTick");
                                 }
                             }
                             Bukkit.getScheduler().runTaskLater(BauSystem.getPlugin(), this::resume, sleepTime);
                             break;
                         }
                     }
+                }
 
                 PlayerCommandPreprocessEvent preprocessEvent = new PlayerCommandPreprocessEvent(player, "/" + command);
                 Bukkit.getServer().getPluginManager().callEvent(preprocessEvent);
@@ -95,29 +119,4 @@ public class ScriptListener implements Listener {
 
     }
 
-    @EventHandler
-    public void onLeftClick(PlayerInteractEvent event) {
-        if(event.getAction() != Action.LEFT_CLICK_AIR && event.getAction() != Action.LEFT_CLICK_BLOCK)
-            return;
-
-        ItemStack item = event.getItem();
-        if(item == null || isNoBook(item) || item.getItemMeta() == null)
-            return;
-
-        event.setCancelled(true);
-        Player player = event.getPlayer();
-        BookMeta meta = (BookMeta) item.getItemMeta();
-        new ScriptExecutor(meta, player);
-    }
-
-    private boolean isNoBook(ItemStack item){
-        switch(Core.getVersion()){
-            case 12:
-                return ScriptListener_12.isNoBook(item);
-            case 15:
-            default:
-                return ScriptListener_15.isNoBook(item);
-        }
-    }
-
 }