Spam fix for older versions

src/main/java/io/github/znetworkw/znpcservers/commands/list/DefaultCommand.java

@@ -84,6 +84,10 @@ public class DefaultCommand extends Command {
             return;
         }
         NPCType npcType = NPCType.valueOf(args.get("type").toUpperCase());
+        if (npcType.getConstructor() == null && !npcType.equals(NPCType.PLAYER)) {
+            Configuration.MESSAGES.sendMessage(sender.getCommandSender(), ConfigurationValue.NOT_SUPPORTED_NPC_TYPE);
+            return;
+        }
         ZNPCsPlus.createNPC(id, npcType, sender.getPlayer().getLocation(), name);
         Configuration.MESSAGES.sendMessage(sender.getCommandSender(), ConfigurationValue.SUCCESS);
     }
@@ -116,7 +120,13 @@ public class DefaultCommand extends Command {
             sender.sendMessage(ChatColor.DARK_GREEN + "NPC list:");
             for (NPCModel npcModel : ConfigurationConstants.NPC_LIST) {
                 List<BaseComponent> parts = new ArrayList<>();
-                String message = "- " + npcModel.getId() + " " + npcModel.getHologramLines().toString() + " (" + npcModel.getLocation().getWorldName() + " " + (int) npcModel.getLocation().getX() + " " + (int) npcModel.getLocation().getY() + " " + (int) npcModel.getLocation().getZ() + ") ";
+                TextComponent component1 = new TextComponent("-");
+                component1.setColor(ChatColor.GREEN);
+                parts.add(component1);
+                TextComponent idComponent = new TextComponent(" " + npcModel.getId());
+                idComponent.setColor(npcModel.getShouldSpawn() ? ChatColor.GREEN : ChatColor.RED);
+                parts.add(idComponent);
+                String message = " " + npcModel.getHologramLines().toString() + " (" + npcModel.getLocation().getWorldName() + " " + (int) npcModel.getLocation().getX() + " " + (int) npcModel.getLocation().getY() + " " + (int) npcModel.getLocation().getZ() + ") ";
                 TextComponent textComponent = new TextComponent(message);
                 textComponent.setColor(ChatColor.GREEN);
                 parts.add(textComponent);

src/main/java/io/github/znetworkw/znpcservers/configuration/ConfigurationConstants.java

@@ -7,6 +7,7 @@ import java.util.List;
 
 public final class ConfigurationConstants {
     public static final String SPACE_SYMBOL = Configuration.CONFIGURATION.getValue(ConfigurationValue.REPLACE_SYMBOL);
+    public static final boolean DEBUG_ENABLED = Configuration.CONFIGURATION.getValue(ConfigurationValue.DEBUG_ENABLED);
     public static final int VIEW_DISTANCE = Configuration.CONFIGURATION.<Integer>getValue(ConfigurationValue.VIEW_DISTANCE);
     public static final int SAVE_DELAY = Configuration.CONFIGURATION.<Integer>getValue(ConfigurationValue.SAVE_NPCS_DELAY_SECONDS);
     public static final boolean RGB_ANIMATION = Configuration.CONFIGURATION.<Boolean>getValue(ConfigurationValue.ANIMATION_RGB);

src/main/java/io/github/znetworkw/znpcservers/configuration/ConfigurationValue.java

@@ -51,6 +51,7 @@ public enum ConfigurationValue {
     FETCHING_SKIN("messages", "&aFetching skin for name: &f%s&a. Please wait...", String.class),
     CANT_GET_SKIN("messages", "&cCould not fetch skin for name: %s.", String.class),
     GET_SKIN("messages", "&aSkin successfully fetched!", String.class),
+    NOT_SUPPORTED_NPC_TYPE("messages", "&cThis NPC type doesn't exists or is not supported in your current server version.", String.class),
     CONVERSATION_LIST("conversations" /* Leave this lowercase or it will break */, new ArrayList<>(), Conversation.class);
 
     public static final Map<String, ImmutableSet<ConfigurationValue>> VALUES_BY_NAME;

src/main/java/io/github/znetworkw/znpcservers/npc/NPC.java

@@ -12,6 +12,8 @@ import com.mojang.authlib.properties.Property;
 import com.mojang.authlib.properties.PropertyMap;
 import io.github.retrooper.packetevents.util.SpigotConversionUtil;
 import io.github.znetworkw.znpcservers.UnexpectedCallException;
+import io.github.znetworkw.znpcservers.configuration.ConfigurationConstants;
+import io.github.znetworkw.znpcservers.configuration.ConfigurationValue;
 import io.github.znetworkw.znpcservers.hologram.Hologram;
 import io.github.znetworkw.znpcservers.nms.PacketCache;
 import io.github.znetworkw.znpcservers.npc.conversation.ConversationModel;
@@ -81,6 +83,13 @@ public class NPC {
         if (NPC_MAP.containsKey(getNpcPojo().getId())) throw new IllegalStateException("npc with id " + getNpcPojo().getId() + " already exists.");
         this.gameProfile = new GameProfile(this.uuid, "[ZNPC] " + this.npcName);
         this.gameProfile.getProperties().put("textures", new Property("textures", this.npcPojo.getSkin(), this.npcPojo.getSignature()));
+        if (this.npcPojo.getNpcType().getConstructor() == null && !this.npcPojo.getNpcType().equals(NPCType.PLAYER)) {
+            this.npcPojo.setShouldSpawn(false);
+            if (ConfigurationConstants.DEBUG_ENABLED) {
+                ZNPCsPlus.LOGGER.warning("The NPC Type " + npcPojo.getNpcType().name() + " does not exist or is not supported in this version.");
+            }
+        } else {
+            this.npcPojo.setShouldSpawn(true);
             changeType(this.npcPojo.getNpcType());
             updateProfile(this.gameProfile.getProperties());
             setLocation(getNpcPojo().getLocation().toBukkitLocation(), false);
@@ -88,6 +97,7 @@ public class NPC {
             if (this.npcPojo.getPathName() != null)
                 setPath(NPCPath.AbstractTypeWriter.find(this.npcPojo.getPathName()));
             this.npcPojo.getCustomizationMap().forEach((key, value) -> this.npcPojo.getNpcType().updateCustomization(this, key, value));
+        }
         NPC_MAP.put(getNpcPojo().getId(), this);
     }
 
@@ -212,6 +222,9 @@ public class NPC {
         if (this.viewers.contains(user)) {
             return;
         }
+        if (!getNpcPojo().getShouldSpawn()) {
+            return;
+        }
         try {
             this.viewers.add(user);
             boolean npcIsPlayer = (this.npcPojo.getNpcType() == NPCType.PLAYER);

src/main/java/io/github/znetworkw/znpcservers/npc/NPCModel.java

@@ -19,6 +19,7 @@ public class NPCModel {
     private ConversationModel conversation;
     private ZLocation location;
     private NPCType npcType;
+    private boolean shouldSpawn;
     private List<String> hologramLines;
     private List<NPCAction> clickActions;
     private Map<EquipmentSlot, ItemStack> npcEquip;
@@ -31,6 +32,7 @@ public class NPCModel {
         this.skin = "";
         this.signature = "";
         this.npcType = NPCType.PLAYER;
+        this.shouldSpawn = true;
         this.hologramLines = Collections.singletonList("/znpcs lines");
         this.clickActions = new ArrayList<>();
         this.npcEquip = new HashMap<>();
@@ -178,6 +180,19 @@ public class NPCModel {
         return this;
     }
 
+    public boolean getShouldSpawn() {
+        return this.shouldSpawn;
+    }
+
+    public void setShouldSpawn(boolean shouldSpawn) {
+        this.shouldSpawn = shouldSpawn;
+    }
+
+    public NPCModel withShouldSpawn(boolean shouldSpawn) {
+        setShouldSpawn(shouldSpawn);
+        return this;
+    }
+
     public List<NPCAction> getClickActions() {
         return this.clickActions;
     }