Add basic sleep command to ScriptSystem

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

@@ -19,6 +19,7 @@
 
 package de.steamwar.bausystem.world;
 
+import de.steamwar.bausystem.BauSystem;
 import de.steamwar.core.Core;
 import org.bukkit.Bukkit;
 import org.bukkit.entity.Player;
@@ -30,10 +31,94 @@ import org.bukkit.event.player.PlayerInteractEvent;
 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 Map<BookMeta, Script> scriptMap = new HashMap<>();
+
+    private class Script {
+
+        private BookMeta bookMeta;
+        private List<String> commands = new ArrayList<>();
+        private int uses = 0;
+
+        public Script(BookMeta bookMeta) {
+            this.bookMeta = bookMeta;
+
+            for(String page : bookMeta.getPages()) {
+                for (String command : page.split("\n")) {
+                    if (command.startsWith("#")) continue;
+                    commands.add(command);
+                }
+            }
+        }
+
+        public void keep() {
+            uses++;
+        }
+
+        public void free() {
+            uses--;
+            if (uses < 0) {
+                scriptMap.remove(bookMeta);
+            }
+        }
+
+    }
+
+    private class ScriptExecutor {
+
+        private Player player;
+        private Script script;
+        private int index = 0;
+
+        public ScriptExecutor(BookMeta bookMeta, Player player) {
+            this.player = player;
+
+            if (!scriptMap.containsKey(bookMeta)) {
+                scriptMap.put(bookMeta, new Script(bookMeta));
+            }
+            script = scriptMap.get(bookMeta);
+            script.keep();
+        }
+
+        public void start() {
+            resume();
+        }
+
+        private void resume() {
+            while (index < script.commands.size()) {
+                String command = script.commands.get(index++);
+
+                if (command.startsWith("sleep")) {
+                    String sleepTimeString = command.substring(5).trim();
+                    int sleepTime = 1;
+                    try {
+                        Integer.parseInt(sleepTimeString);
+                    } catch (NumberFormatException e) {
+                        // Ignored
+                    }
+                    Bukkit.getScheduler().runTaskLater(BauSystem.getPlugin(), this::resume, sleepTime);
+                    break;
+                }
+
+                PlayerCommandPreprocessEvent preprocessEvent = new PlayerCommandPreprocessEvent(player, "/" + command);
+                Bukkit.getServer().getPluginManager().callEvent(preprocessEvent);
+                if(preprocessEvent.isCancelled())
+                    continue;
+
+                Bukkit.getLogger().log(Level.INFO, player.getName() + " dispatched command: " + command);
+                Bukkit.getServer().dispatchCommand(player, command);
+            }
+        }
+
+    }
+
     @EventHandler
     public void onLeftClick(PlayerInteractEvent event) {
         if(event.getAction() != Action.LEFT_CLICK_AIR && event.getAction() != Action.LEFT_CLICK_BLOCK)
@@ -46,19 +131,7 @@ public class ScriptListener implements Listener {
         event.setCancelled(true);
         Player player = event.getPlayer();
         BookMeta meta = (BookMeta) item.getItemMeta();
-        for(String page : meta.getPages()){
+        new ScriptExecutor(meta, player).resume();
-            for(String command : page.split("\n")){
-                if (command.startsWith("#")) continue;
-
-                PlayerCommandPreprocessEvent preprocessEvent = new PlayerCommandPreprocessEvent(player, "/" + command);
-                Bukkit.getServer().getPluginManager().callEvent(preprocessEvent);
-                if(preprocessEvent.isCancelled())
-                    continue;
-
-                Bukkit.getLogger().log(Level.INFO, player.getName() + " dispatched command: " + command);
-                Bukkit.getServer().dispatchCommand(player, command);
-            }
-        }
     }
 
     private boolean isNoBook(ItemStack item){