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/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java
index b81314654d562036680666bd95be4ec21d9b66e1..3f9b13048eff59094a229d1a41d219bbd7f3eb01 100644
--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
@@ -230,6 +230,7 @@ public class ServerPlayer extends Player {
     public int latency;
     public boolean wonGame;
     private int containerUpdateDelay; // Paper
+    public long loginTime; // Paper
     // Paper start - cancellable death event
     public boolean queueHealthUpdatePacket = false;
     public net.minecraft.network.protocol.game.ClientboundSetHealthPacket queuedHealthUpdatePacket;
diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java
index f8ad63b05ece77cf973ef41ef40111780f0d2d04..bb0c40246f70deecf10b9540d6cba7f65cc91372 100644
--- a/src/main/java/net/minecraft/server/players/PlayerList.java
+++ b/src/main/java/net/minecraft/server/players/PlayerList.java
@@ -178,6 +178,7 @@ public abstract class PlayerList {
     }
 
     public void placeNewPlayer(Connection connection, ServerPlayer player) {
+        player.loginTime = System.currentTimeMillis(); // Paper
         GameProfile gameprofile = player.getGameProfile();
         GameProfileCache usercache = this.server.getProfileCache();
         Optional<GameProfile> optional = usercache.get(gameprofile.getId());
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftOfflinePlayer.java b/src/main/java/org/bukkit/craftbukkit/CraftOfflinePlayer.java
index e7442952ef1f03969949014492a7ddc6d0796ba5..d7823d7dc88cfba6f6ac9dae220e03dea4a0bcdd 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftOfflinePlayer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftOfflinePlayer.java
@@ -250,6 +250,61 @@ public class CraftOfflinePlayer implements OfflinePlayer, ConfigurationSerializa
         return this.getData() != null;
     }
 
+    // Paper start
+    @Override
+    public long getLastLogin() {
+        Player player = getPlayer();
+        if (player != null) return player.getLastLogin();
+
+        CompoundTag data = getPaperData();
+
+        if (data != null) {
+            if (data.contains("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();
+
+        CompoundTag data = getPaperData();
+
+        if (data != null) {
+            if (data.contains("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 CompoundTag getPaperData() {
+        CompoundTag result = getData();
+
+        if (result != null) {
+            if (!result.contains("Paper")) {
+                result.put("Paper", new CompoundTag());
+            }
+            result = result.getCompound("Paper");
+        }
+
+        return result;
+    }
+    // Paper end
+
     @Override
     public Location getLastDeathLocation() {
         if (this.getData().contains("LastDeathLocation", 10)) {
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
index 0fcde65af63c4fcfbbef5875bec759b209cfd5f1..1a7f5978ad9ab1ee15f2e40e8109cf6dad5f890c 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
@@ -168,6 +168,7 @@ 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, ServerPlayer entity) {
@@ -1686,6 +1687,18 @@ 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(CompoundTag nbttagcompound) {
         this.hasPlayedBefore = true;
         if (nbttagcompound.contains("bukkit")) {
@@ -1708,6 +1721,8 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
     }
 
     public void setExtraData(CompoundTag nbttagcompound) {
+        this.lastSaveTime = System.currentTimeMillis(); // Paper
+
         if (!nbttagcompound.contains("bukkit")) {
             nbttagcompound.put("bukkit", new CompoundTag());
         }
@@ -1722,6 +1737,16 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
         data.putLong("firstPlayed", this.getFirstPlayed());
         data.putLong("lastPlayed", System.currentTimeMillis());
         data.putString("lastKnownName", handle.getScoreboardName());
+
+        // Paper start - persist for use in offline save data
+        if (!nbttagcompound.contains("Paper")) {
+            nbttagcompound.put("Paper", new CompoundTag());
+        }
+
+        CompoundTag paper = nbttagcompound.getCompound("Paper");
+        paper.putLong("LastLogin", handle.loginTime);
+        paper.putLong("LastSeen", System.currentTimeMillis());
+        // Paper end
     }
 
     @Override