potential feature for per-player hologram names

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

@@ -16,7 +16,8 @@ public enum MinecraftVersion {
     V1_13_R1,
     V1_13_R2,
     V1_14_R1,
-    V1_15_R1;
+    V1_15_R1,
+    V1_16_R1;
 
     public boolean isAboveOrEqual(MinecraftVersion compare) {
         return ordinal() >= compare.ordinal();

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

@@ -49,6 +49,10 @@ public abstract class NPCBase implements NPC, NPCPacketHandler {
 
     protected final Map<NPCSlot, ItemStack> items = new EnumMap<>(NPCSlot.class);
 
+    // Storage for per-player text;
+    protected final Map<UUID, List<String>> uniqueText = new HashMap<>();
+    protected final Map<UUID, Hologram> textDisplayHolograms = new HashMap<>();
+
     public NPCBase(NPCLib instance, List<String> text) {
         this.instance = instance;
         this.text = text == null ? Collections.emptyList() : text;
@@ -60,6 +64,42 @@ public abstract class NPCBase implements NPC, NPCPacketHandler {
         return instance;
     }
 
+    @Override
+    public Hologram getPlayerHologram(Player player){
+        Hologram playerHologram = textDisplayHolograms.getOrDefault(player.getUniqueId(), null);
+        return playerHologram;
+    }
+
+    @Override
+    public NPC setPlayerLines(List<String> uniqueLines, Player targetPlayer) {
+        uniqueText.put(targetPlayer.getUniqueId(), uniqueLines);
+        return this;
+    }
+
+    @Override
+    public NPC setPlayerLines(List<String> uniqueLines, Player targetPlayer, boolean update) {
+        List<String> originalLines = getPlayerLines(targetPlayer);
+        setPlayerLines(uniqueLines, targetPlayer);
+        if (update){
+            if (originalLines.size() != uniqueLines.size()){ // recreate the entire hologram
+                Hologram originalhologram = getPlayerHologram(targetPlayer);
+                originalhologram.hide(targetPlayer); // essentially destroy the hologram
+                textDisplayHolograms.remove(targetPlayer.getUniqueId()); // remove the old obj
+            }
+
+            Hologram hologram = getPlayerHologram(targetPlayer); //
+            List<Object> updatePackets = hologram.getUpdatePackets(getPlayerLines(targetPlayer));
+            hologram.update(targetPlayer, updatePackets);
+            hologram.show(targetPlayer);
+        }
+        return this;
+    }
+
+    @Override
+    public List<String> getPlayerLines(Player targetPlayer) {
+        return uniqueText.getOrDefault(targetPlayer.getUniqueId(), text);
+    }
+
     @Override
     public UUID getUniqueId() {
         return uuid;
@@ -303,11 +343,16 @@ public abstract class NPCBase implements NPC, NPCPacketHandler {
 
     @Override
     public NPC setText(List<String> text) {
-        List<Object> updatePackets = hologram.getUpdatePackets(text);
+        uniqueText.clear();
 
         for (UUID shownUuid : shown) {
             Player player = Bukkit.getPlayer(shownUuid);
             if (player != null && isShown(player)) {
+                Hologram originalhologram = getPlayerHologram(player);
+                originalhologram.hide(player); // essentially destroy the hologram
+                textDisplayHolograms.remove(player.getUniqueId()); // remove the old obj
+                Hologram hologram = getPlayerHologram(player); // let it regenerate
+                List<Object> updatePackets = hologram.getUpdatePackets(getPlayerLines(player));
                 hologram.update(player, updatePackets);
             }
         }

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

@@ -15,6 +15,8 @@ interface NPCPacketHandler {
 
     void createPackets();
 
+    void createPackets(Player player);
+
     void sendShowPackets(Player player);
 
     void sendHidePackets(Player player);