Started thinking about the implemtation of #11

api/src/main/java/net/jitse/npclib/internal/NPCBase.java

@@ -22,15 +22,13 @@ import org.bukkit.util.Vector;
 
 import java.util.*;
 
-public abstract class SimpleNPC implements NPC, PacketHandler {
+public abstract class NPCBase implements NPC, NPCPacketHandler {
 
     protected final UUID uuid = UUID.randomUUID();
     protected final int entityId = Integer.MAX_VALUE - NPCManager.getAllNPCs().size();
     protected final String name = uuid.toString().replace("-", "").substring(0, 10);
     protected final GameProfile gameProfile = new GameProfile(uuid, name);
 
-    protected final List<String> lines;
-
     private final Set<UUID> shown = new HashSet<>();
     private final Set<UUID> autoHidden = new HashSet<>();
 
@@ -38,15 +36,16 @@ public abstract class SimpleNPC implements NPC, PacketHandler {
     protected NPCState[] activeStates = new NPCState[]{};
 
     protected NPCLib instance;
+    protected List<String> text;
     protected Location location;
     protected Skin skin;
 
     // offHand support in 1.9 R1 and later.
     protected ItemStack helmet, chestplate, leggings, boots, inHand, offHand;
 
-    public SimpleNPC(NPCLib instance, List<String> lines) {
+    public NPCBase(NPCLib instance, List<String> text) {
         this.instance = instance;
-        this.lines = lines == null ? Collections.emptyList() : lines;
+        this.text = text == null ? Collections.emptyList() : text;
 
         NPCManager.add(this);
     }
@@ -299,4 +298,16 @@ public abstract class SimpleNPC implements NPC, PacketHandler {
         }
         return this;
     }
+
+    @Override
+    public NPC setText(List<String> text) {
+        for (UUID shownUuid : shown) {
+            Player player = Bukkit.getPlayer(shownUuid);
+            if (player != null && isShown(player)) {
+                sendTextUpdatePackets(this.text, text, player);
+            }
+        }
+        this.text = text;
+        return this;
+    }
 }

api/src/main/java/net/jitse/npclib/internal/NPCManager.java

@@ -12,17 +12,17 @@ import java.util.Set;
  */
 public final class NPCManager {
 
-    private static Set<SimpleNPC> npcs = new HashSet<>();
+    private static Set<NPCBase> npcs = new HashSet<>();
 
-    public static Set<SimpleNPC> getAllNPCs() {
+    public static Set<NPCBase> getAllNPCs() {
         return npcs;
     }
 
-    public static void add(SimpleNPC npc) {
+    public static void add(NPCBase npc) {
         npcs.add(npc);
     }
 
-    public static void remove(SimpleNPC npc) {
+    public static void remove(NPCBase npc) {
         npcs.remove(npc);
     }
 

api/src/main/java/net/jitse/npclib/internal/NPCPacketHandler.java

@@ -10,7 +10,7 @@ import org.bukkit.entity.Player;
 /**
  * @author Jitse Boonstra
  */
-interface PacketHandler {
+interface NPCPacketHandler {
 
     void createPackets();