From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Zach Brown <zach@zachbr.io>
Date: Wed, 2 Jan 2019 00:35:43 -0600
Subject: [PATCH] Add APIs to replace OfflinePlayer#getLastPlayed

Currently OfflinePlayer#getLastPlayed could more accurately be described
as "OfflinePlayer#getLastTimeTheirDataWasSaved".

The API doc says it should return the last time the server "witnessed"
the player, whilst also saying it should return the last time they
logged in. The current implementation does neither.

Given this interesting contradiction in the API documentation and the
current defacto implementation, I've elected to deprecate (with no
intent to remove) and replace it with two new methods, clearly named and
documented as to their purpose.

diff --git a/src/main/java/net/minecraft/server/EntityPlayer.java b/src/main/java/net/minecraft/server/EntityPlayer.java
index f68d5931a3d2df5f69032c49a4b2b80a0783f504..ce43462b9a9a393b51a2c4b96467ebd007fd7126 100644
--- a/src/main/java/net/minecraft/server/EntityPlayer.java
+++ b/src/main/java/net/minecraft/server/EntityPlayer.java
@@ -82,6 +82,7 @@ public class EntityPlayer extends EntityHuman implements ICrafting {
     public int ping;
     public boolean viewingCredits;
     private int containerUpdateDelay; // Paper
+    public long loginTime; // Paper
     // Paper start - cancellable death event
     public boolean queueHealthUpdatePacket = false;
     public net.minecraft.server.PacketPlayOutUpdateHealth queuedHealthUpdatePacket;
diff --git a/src/main/java/net/minecraft/server/PlayerList.java b/src/main/java/net/minecraft/server/PlayerList.java
index 3501588adf539a05a5056c9a4f45d49d9d656a37..fdc541c6867a7b7c03d622bddeb55f528086407b 100644
--- a/src/main/java/net/minecraft/server/PlayerList.java
+++ b/src/main/java/net/minecraft/server/PlayerList.java
@@ -97,6 +97,7 @@ public abstract class PlayerList {
     }
 
     public void a(NetworkManager networkmanager, EntityPlayer entityplayer) {
+        entityplayer.loginTime = System.currentTimeMillis(); // Paper
         GameProfile gameprofile = entityplayer.getProfile();
         UserCache usercache = this.server.getUserCache();
         GameProfile gameprofile1 = usercache.getProfile(gameprofile.getId());
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftOfflinePlayer.java b/src/main/java/org/bukkit/craftbukkit/CraftOfflinePlayer.java
index 00333548b470435aa89fb0f4b29047eb1461e992..5770d4183c1b9ab6119a25930283c0235250ed6e 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftOfflinePlayer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftOfflinePlayer.java
@@ -244,6 +244,61 @@ public class CraftOfflinePlayer implements OfflinePlayer, ConfigurationSerializa
         return getData() != null;
     }
 
+    // Paper start
+    @Override
+    public long getLastLogin() {
+        Player player = getPlayer();
+        if (player != null) return player.getLastLogin();
+
+        NBTTagCompound data = getPaperData();
+
+        if (data != null) {
+            if (data.hasKey("LastLogin")) {
+                return data.getLong("LastLogin");
+            } else {
+                // if the player file cannot provide accurate data, this is probably the closest we can approximate
+                File file = getDataFile();
+                return file.lastModified();
+            }
+        } else {
+            return 0;
+        }
+    }
+
+    @Override
+    public long getLastSeen() {
+        Player player = getPlayer();
+        if (player != null) return player.getLastSeen();
+
+        NBTTagCompound data = getPaperData();
+
+        if (data != null) {
+            if (data.hasKey("LastSeen")) {
+                return data.getLong("LastSeen");
+            } else {
+                // if the player file cannot provide accurate data, this is probably the closest we can approximate
+                File file = getDataFile();
+                return file.lastModified();
+            }
+        } else {
+            return 0;
+        }
+    }
+
+    private NBTTagCompound getPaperData() {
+        NBTTagCompound result = getData();
+
+        if (result != null) {
+            if (!result.hasKey("Paper")) {
+                result.set("Paper", new NBTTagCompound());
+            }
+            result = result.getCompound("Paper");
+        }
+
+        return result;
+    }
+    // Paper end
+
     @Override
     public Location getBedSpawnLocation() {
         NBTTagCompound data = getData();
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
index 28a04cb8a90ad82b86f658ad17675ab58f7e8d41..806c621c6dfec93b7d0e46471dc2757998c90486 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
@@ -142,6 +142,7 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
     private org.bukkit.event.player.PlayerResourcePackStatusEvent.Status resourcePackStatus;
     private String resourcePackHash;
     private static final boolean DISABLE_CHANNEL_LIMIT = System.getProperty("paper.disableChannelLimit") != null; // Paper - add a flag to disable the channel limit
+    private long lastSaveTime;
     // Paper end
 
     public CraftPlayer(CraftServer server, EntityPlayer entity) {
@@ -1405,6 +1406,18 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
         this.firstPlayed = firstPlayed;
     }
 
+    // Paper start
+    @Override
+    public long getLastLogin() {
+        return getHandle().loginTime;
+    }
+
+    @Override
+    public long getLastSeen() {
+        return isOnline() ? System.currentTimeMillis() : this.lastSaveTime;
+    }
+    // Paper end
+
     public void readExtraData(NBTTagCompound nbttagcompound) {
         hasPlayedBefore = true;
         if (nbttagcompound.hasKey("bukkit")) {
@@ -1427,6 +1440,8 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
     }
 
     public void setExtraData(NBTTagCompound nbttagcompound) {
+        this.lastSaveTime = System.currentTimeMillis(); // Paper
+
         if (!nbttagcompound.hasKey("bukkit")) {
             nbttagcompound.set("bukkit", new NBTTagCompound());
         }
@@ -1441,6 +1456,16 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
         data.setLong("firstPlayed", getFirstPlayed());
         data.setLong("lastPlayed", System.currentTimeMillis());
         data.setString("lastKnownName", handle.getName());
+
+        // Paper start - persist for use in offline save data
+        if (!nbttagcompound.hasKey("Paper")) {
+            nbttagcompound.set("Paper", new NBTTagCompound());
+        }
+
+        NBTTagCompound paper = nbttagcompound.getCompound("Paper");
+        paper.setLong("LastLogin", handle.loginTime);
+        paper.setLong("LastSeen", System.currentTimeMillis());
+        // Paper end
     }
 
     @Override