PaperMC/patches/server/0302-Add-APIs-to-replace-OfflinePlayer-getLastPlayed.patch

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 42035548577b7c60806a557dd9f9931ca9584e8c..03257305e1364a6dbda3358ff2cfba5565b4d5da 100644
--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
@@ -219,6 +219,7 @@ 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 9ce6687635181ac3f28cf116fc0c3c6fda56f965..b345e46ac004b6854fa91b5c65ea873705e111ca 100644
--- a/src/main/java/net/minecraft/server/players/PlayerList.java
+++ b/src/main/java/net/minecraft/server/players/PlayerList.java
@@ -172,6 +172,7 @@ 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 93de44b05a698515457052c9c684c4ef44c5cc40..b20bfe5ab165bf86985e5ff2f93f415d9710e0e4 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 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 getBedSpawnLocation() {
         CompoundTag data = this.getData();
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
index 22d223e8da8ab80baafdad387c058a33e014501f..8da3e688db0df4644926c0d8335cd274d7f996c5 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
@@ -151,6 +151,7 @@ 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) {
@@ -1513,6 +1514,18 @@ 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")) {
@@ -1535,6 +1548,8 @@ 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());
         }
@@ -1549,6 +1564,16 @@ 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