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 960e1fd4ad33ffc9d2baa302a407f9ad94d9a7ce..c5b8e76e2c8646a5da6ac640ee1047a1d00b6849 100644
--- a/src/main/java/net/minecraft/server/EntityPlayer.java
+++ b/src/main/java/net/minecraft/server/EntityPlayer.java
@@ -76,6 +76,7 @@ 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 6b67201852db53fee5e2ee79d41c13f675065f72..e148940ab3721cff27cf791c159c11b9b94191e4 100644
--- a/src/main/java/net/minecraft/server/PlayerList.java
+++ b/src/main/java/net/minecraft/server/PlayerList.java
@@ -94,6 +94,7 @@ 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 0e8a21b80371dd5ce833da3daf12fdcd9aabae9f..32e02af96e8f8db68509022f742a1239c9b7b4c7 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftOfflinePlayer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftOfflinePlayer.java
@@ -260,6 +260,61 @@ 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 a8f46ceb4b5a545bc4dd8d1e7d9438238f8af93a..8cf17e5ebf356d7a35535bacd6ebf44ff24e796e 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
@@ -139,6 +139,7 @@ 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) {
@@ -1349,6 +1350,18 @@ 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")) {
@@ -1371,6 +1384,8 @@ 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());
         }
@@ -1385,6 +1400,16 @@ 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
