Paper/nms-patches/WorldNBTStorage.patch

--- a/net/minecraft/server/WorldNBTStorage.java
+++ b/net/minecraft/server/WorldNBTStorage.java
@@ -10,6 +10,10 @@
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
+// CraftBukkit start
+import org.bukkit.craftbukkit.entity.CraftPlayer;
+// CraftBukkit end
+
 public class WorldNBTStorage {
 
     private static final Logger LOGGER = LogManager.getLogger();
@@ -53,6 +57,16 @@
         }
 
         if (nbttagcompound != null) {
+            // CraftBukkit start
+            if (entityhuman instanceof EntityPlayer) {
+                CraftPlayer player = (CraftPlayer) entityhuman.getBukkitEntity();
+                // Only update first played if it is older than the one we have
+                long modified = new File(this.playerDir, entityhuman.getUniqueID().toString() + ".dat").lastModified();
+                if (modified < player.getFirstPlayed()) {
+                    player.setFirstPlayed(modified);
+                }
+            }
+            // CraftBukkit end
             int i = nbttagcompound.hasKeyOfType("DataVersion", 3) ? nbttagcompound.getInt("DataVersion") : -1;
 
             entityhuman.load(GameProfileSerializer.a(this.a, DataFixTypes.PLAYER, nbttagcompound, i));
@@ -61,6 +75,22 @@
         return nbttagcompound;
     }
 
+    // CraftBukkit start
+    public NBTTagCompound getPlayerData(String s) {
+        try {
+            File file1 = new File(this.playerDir, s + ".dat");
+
+            if (file1.exists()) {
+                return NBTCompressedStreamTools.a((InputStream) (new FileInputStream(file1)));
+            }
+        } catch (Exception exception) {
+            LOGGER.warn("Failed to load player data for " + s);
+        }
+
+        return null;
+    }
+    // CraftBukkit end
+
     public String[] getSeenPlayers() {
         String[] astring = this.playerDir.list();
 
@@ -76,4 +106,10 @@
 
         return astring;
     }
+
+    // CraftBukkit start
+    public File getPlayerDir() {
+        return playerDir;
+    }
+    // CraftBukkit end
 }