Refactor code and remove naga class

src/main/java/net/babamod/mineclass/classes/MineClassImpl.java

@@ -0,0 +1,54 @@
+package net.babamod.mineclass.classes;
+
+import org.bukkit.Material;
+import org.bukkit.entity.Player;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.potion.PotionEffect;
+
+import java.util.ArrayList;
+import java.util.stream.Collectors;
+
+public abstract class MineClassImpl implements MineClass {
+
+  @Override
+  public boolean is(Player player) {
+    return player.getActivePotionEffects().stream()
+        .map(PotionEffect::getType)
+        .collect(Collectors.toList())
+        .containsAll(getPotionEffects().keySet());
+  }
+
+  @Override
+  public void reapplyEffects(Player player) {
+    getPotionEffects()
+        .forEach(
+            (key, value) -> {
+              if (player.hasPotionEffect(key)) {
+                player.removePotionEffect(key);
+              }
+              player.addPotionEffect(
+                  new PotionEffect(key, Integer.MAX_VALUE, value - 1, false, false));
+            });
+  }
+
+  @Override
+  public boolean isItemForbidden(Material type) {
+    return getForbiddenItems().contains(type);
+  }
+
+  @Override
+  public boolean isItemEnchantable(Material type) {
+    return getClassEnchantments().containsKey(type);
+  }
+
+  @Override
+  public void enchantItem(ItemStack itemStack) {
+    getClassEnchantments()
+        .getOrDefault(itemStack.getType(), new ArrayList<>())
+        .forEach(
+            enchantmentIntegerPair ->
+                itemStack.addUnsafeEnchantment(
+                    enchantmentIntegerPair.getFirst(), enchantmentIntegerPair.getSecond()));
+    MineClassFactory.setUnbreakableAndSoulbound(itemStack);
+  }
+}