small update

src/main/java/pers/xanadu/enderdragon/config/Config.java

@@ -6,6 +6,7 @@ import java.io.*;
 import java.lang.reflect.Field;
 import java.lang.reflect.Type;
 import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
 import java.util.*;
 import java.util.jar.JarEntry;
 import java.util.jar.JarFile;
@@ -21,6 +22,7 @@ public class Config {
     public static boolean advanced_setting_save_respawn_status;
     public static boolean advanced_setting_save_bossbar;
     public static boolean advanced_setting_glowing_fix;
+    //public static boolean advanced_setting_can_spawn_not_the_end;
     public static boolean advanced_setting_backslash_split_reward;
     public static String damage_visible_mode;
     public static int damage_statistics_limit;
@@ -98,10 +100,7 @@ public class Config {
             }
         } catch (IOException ignored) {}
     }
-    public static void copyFile(String source, String dest,boolean replace) {
-        if (source == null || source.equals("")) return;
-        source = source.replace('\\', '/');
-        File inFile = new File("plugins/EnderDragon", source);
+    public static void copyFile(File source, String dest, boolean replace) {
         File outFile = new File("plugins/EnderDragon", dest);
         int lastIndex = dest.lastIndexOf('/');
         File outDir = new File("plugins/EnderDragon", dest.substring(0, Math.max(lastIndex, 0)));
@@ -110,8 +109,8 @@ public class Config {
         }
         try {
             if (!outFile.exists() || replace) {
-                InputStream in = new FileInputStream(inFile);
-                OutputStream out = new FileOutputStream(outFile);
+                InputStream in = Files.newInputStream(source.toPath());
+                OutputStream out = Files.newOutputStream(outFile.toPath());
                 byte[] buf = new byte[1024];
                 int len;
                 while ((len = in.read(buf)) > 0) {
@@ -121,9 +120,15 @@ public class Config {
                 in.close();
             }
         } catch (IOException ignored) {
-            Lang.error("Failed to copy file: "+inFile.getPath()+" -> "+outFile.getPath());
+            Lang.error("Failed to copy file: "+source.getPath()+" -> "+outFile.getPath());
         }
     }
+    public static void copyFile(String source, String dest,boolean replace) {
+        if (source == null || source.equals("")) return;
+        source = source.replace('\\', '/');
+        File inFile = new File("plugins/EnderDragon", source);
+        copyFile(inFile, dest, replace);
+    }
     public static void saveDirectoryResource(String srcDirectory,boolean replace) {
         String destDirectory = new File(plugin.getDataFolder(),srcDirectory).getPath();
         try {

src/main/java/pers/xanadu/enderdragon/manager/DragonManager.java

@@ -27,6 +27,7 @@ import java.io.File;
 import java.lang.reflect.Field;
 import java.lang.reflect.Method;
 import java.util.*;
+import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ThreadLocalRandom;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
@@ -37,6 +38,8 @@ public class DragonManager {
     static final ArrayList<MyDragon> dragons = new ArrayList<>();
     static final Map<String, MyDragon> mp = new HashMap<>();
     public static List<String> dragon_names = new ArrayList<>();
+    public static final Map<UUID,DragonInfo> existing_dragon = new ConcurrentHashMap<>();
+    public static final Map<String,DragonInfo> main_dragon = new ConcurrentHashMap<>();
     private static int sum = 0;
     private static final int[][] nxt = {{3,0},{0,3},{-3,0},{0,-3}};
     private static final int[][] nxt_2 = {{2,0},{0,2},{-2,0},{0,-2}};
@@ -485,6 +488,39 @@ public class DragonManager {
             return false;
         }
     }
+
+    /**
+     * Only used to initialize. DON'T use this if speed is essential.
+     * @param world world
+     * @return The dragon found in this world.
+     */
+    public static EnderDragon getEnderDragon(final World world){
+        if(world.getEnvironment() != World.Environment.THE_END){
+            return world.getEntitiesByClass(EnderDragon.class).iterator().next();
+        }
+        if(Version.mcMainVersion >= 16){
+            DragonBattle battle = world.getEnderDragonBattle();
+            assert battle != null;
+            return battle.getEnderDragon();
+        }
+        try {
+            Object battle = getEnderDragonBattle(world);
+            assert battle != null;
+            Field k = EnderDragonBattleClass.getDeclaredField("k");
+            k.setAccessible(true);
+            Object dragonKilled = k.get(battle);
+            if((boolean) dragonKilled) return null;
+            Field m = EnderDragonBattleClass.getDeclaredField("m");
+            m.setAccessible(true);
+            Object uuid = m.get(battle);
+//            Field d = EnderDragonBattleClass.getDeclaredField("d");
+//            d.setAccessible(true);
+//            Object worldServer = d.get(battle);
+            return (EnderDragon) Bukkit.getEntity((UUID) uuid);
+        } catch (ReflectiveOperationException e) {
+            return null;
+        }
+    }
     public static Location getEndPortalLocation(final World world){
         if(world == null) return null;
         if(world.getEnvironment() != World.Environment.THE_END) return null;

src/main/java/pers/xanadu/enderdragon/metadata/DragonInfo.java

@@ -1,8 +1,15 @@
 package pers.xanadu.enderdragon.metadata;
 
+import org.bukkit.entity.EnderDragon;
+
 public class DragonInfo {
+    private final EnderDragon handle;
     public String unique_name;
-    public DragonInfo(String unique_name){
+    public DragonInfo(final EnderDragon dragon, String unique_name){
+        this.handle = dragon;
         this.unique_name = unique_name;
     }
+    public EnderDragon getHandle(){
+        return handle;
+    }
 }

src/main/resources/config-zhcn.yml

@@ -97,5 +97,7 @@ advanced_setting:
   world_env_fix: false
   save_respawn_status: false
   save_bossbar: false
+  # to do: 允许在非末地环境使用/ed spawn或respawn复活末影龙
+  # can_spawn_not_the_end: false
   backslash_split:
     reward: false

src/main/resources/config.yml

@@ -96,5 +96,7 @@ advanced_setting:
   world_env_fix: false
   save_respawn_status: false
   save_bossbar: false
+  # to-do
+  # can_spawn_not_the_end: false
   backslash_split:
     reward: false

src/main/resources/plugin.yml

@@ -1,5 +1,5 @@
 name: EnderDragon
-version: 2.5.0-dev
+version: 2.5.0
 main: pers.xanadu.enderdragon.EnderDragon
 author: Xanadu13
 api-version: 1.13