Fix #14

Plugin/src/main/resources/config.yml

@@ -4,5 +4,8 @@ ask-for-name-after-taming: true
 max-fox-tames: 0
 prefix: "&c[Tamable Foxes] "
 
+no-tame-worlds:
+  - world_nether
+
 tamed-behavior:
   attack-wild-animals: true

Plugin/src/main/resources/plugin.yml

@@ -20,3 +20,6 @@ permissions:
   tamablefoxes.tame.unlimited:
     description: "Lets players bypass the tame limit."
     default: op
+  tamablefoxes.tame.anywhere:
+    description: "Lets players bypass the banned worlds in config.yml (so they can tame in any world)."
+    default: op

Utility/src/main/java/net/seanomik/tamablefoxes/util/io/Config.java

@@ -5,6 +5,9 @@ import org.bukkit.configuration.file.FileConfiguration;
 import org.bukkit.entity.Player;
 import org.bukkit.plugin.Plugin;
 
+import java.util.ArrayList;
+import java.util.List;
+
 public class Config {
     private static FileConfiguration config = null;
 
@@ -23,9 +26,15 @@ public class Config {
     // Check if a tamed fox attacks wild animals.
     public static boolean doesTamedAttackWildAnimals() { return config.getBoolean("tamed-behavior.attack-wild-animals"); }
 
+    // Get worlds that taming is not allowed in.
+    public static List<String> BannedWorlds() {
+        return config.contains("no-tame-worlds") ? config.getStringList("no-tame-worlds") : new ArrayList<>();
+    }
+
     // Check if the player can tame the fox.
     public static boolean canPlayerTameFox(Player player) {
-        return player.hasPermission("tamablefoxes.tame") || player.isOp();
+        return ( player.hasPermission("tamablefoxes.tame") || player.isOp() ) &&
+            ( !BannedWorlds().contains(player.getWorld().getName()) || player.hasPermission("tamablefoxes.tame.anywhere") );
     }
 
     public static int getMaxPlayerFoxTames() {