From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sun, 9 Aug 2020 21:19:15 +0300
Subject: [PATCH] Incremental player saving

Co-authored-by: MrIvanPlays <ivan@mrivanplays.com>
Ported to Yatopia and 1.16.1 by MrIvanPlays

diff --git a/src/main/java/dev/tr7zw/yatopia/YatopiaConfig.java b/src/main/java/dev/tr7zw/yatopia/YatopiaConfig.java
index 7503322478048cdcca7659202596aea4d95fd835..6d3a2c874077f3abaeda1e365963ce601c901085 100644
--- a/src/main/java/dev/tr7zw/yatopia/YatopiaConfig.java
+++ b/src/main/java/dev/tr7zw/yatopia/YatopiaConfig.java
@@ -223,4 +223,15 @@ public class YatopiaConfig {
 	fixFallDistance = getBoolean("settings.fixFallDistance", false);
     }
 
+    public static int maxPlayerAutoSavePerTick = 10;
+    public static int playerAutoSaveRate = -1;
+    private static void incrementalPlayerdataSaving() {
+        playerAutoSaveRate = getInt("settings.player-auto-save-rate", -1);
+        maxPlayerAutoSavePerTick = getInt("settings.max-player-auto-save-per-tick", -1);
+        if (maxPlayerAutoSavePerTick == -1) { // -1 Automatic / "Recommended"
+            // 10 should be safe for everyone unless you mass spamming player auto save
+            maxPlayerAutoSavePerTick = (playerAutoSaveRate == -1 || playerAutoSaveRate > 100) ? 10 : 20;
+        }
+    }
+
 }
\ No newline at end of file
diff --git a/src/main/java/net/minecraft/server/EntityPlayer.java b/src/main/java/net/minecraft/server/EntityPlayer.java
index f143624c072ddd300591bdadd3173c97e16973fe..348f25fb974a99e991090747cedb0acd7eade8e9 100644
--- a/src/main/java/net/minecraft/server/EntityPlayer.java
+++ b/src/main/java/net/minecraft/server/EntityPlayer.java
@@ -29,6 +29,7 @@ import java.util.concurrent.CompletableFuture;
 public class EntityPlayer extends EntityHuman implements ICrafting {
 
     private static final Logger LOGGER = LogManager.getLogger();
+    public long lastSave = MinecraftServer.currentTick; // Yatopia
     public PlayerConnection playerConnection;
     public NetworkManager networkManager; // Paper
     public final MinecraftServer server;
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 440c7f15e2e081ec13d6ab32177c70ef4959e8bb..6a151e60b7f203b629c55c80ac998a80fef2f67d 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -1282,9 +1282,15 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas
         //if (autosavePeriod > 0 && this.ticks % autosavePeriod == 0) { // CraftBukkit // Paper - move down
             //MinecraftServer.LOGGER.debug("Autosave started"); // Paper
             serverAutoSave = (autosavePeriod > 0 && this.ticks % autosavePeriod == 0); // Paper
+            // Yatopia start
+            int playerSaveInterval = dev.tr7zw.yatopia.YatopiaConfig.playerAutoSaveRate;
+            if (playerSaveInterval < 0) {
+                playerSaveInterval = autosavePeriod;
+            }
+            // Yatopia end
             //this.methodProfiler.enter("save"); // Akarin - remove caller
-            if (autosavePeriod > 0 && this.ticks % autosavePeriod == 0) { // Paper
-            this.playerList.savePlayers();
+            if (playerSaveInterval > 0) { // Yatopia
+            this.playerList.savePlayers(playerSaveInterval); // Yatopia
             }// Paper
             // Paper start
             for (WorldServer world : getWorlds()) {
diff --git a/src/main/java/net/minecraft/server/PlayerList.java b/src/main/java/net/minecraft/server/PlayerList.java
index 8498324704ea2e3178a46149b2cc2fd37682dbff..7ac8e538e98b027b5aea20231b2aad79f49e5cb5 100644
--- a/src/main/java/net/minecraft/server/PlayerList.java
+++ b/src/main/java/net/minecraft/server/PlayerList.java
@@ -468,6 +468,7 @@ public abstract class PlayerList {
     protected void savePlayerFile(EntityPlayer entityplayer) {
         if (!entityplayer.getBukkitEntity().isPersistent()) return; // CraftBukkit
         if (!entityplayer.didPlayerJoinEvent) return; // Paper - If we never fired PJE, we disconnected during login. Data has not changed, and additionally, our saved vehicle is not loaded! If we save now, we will lose our vehicle (CraftBukkit bug)
+        entityplayer.lastSave = MinecraftServer.currentTick; // Yatopia
         this.playerFileData.save(entityplayer);
         ServerStatisticManager serverstatisticmanager = entityplayer.getStatisticManager(); // CraftBukkit
 
@@ -1114,10 +1115,21 @@ public abstract class PlayerList {
     }
 
     public void savePlayers() {
+        // Yatopia start - incremental player saving
+        savePlayers(null);
+    }
+    public void savePlayers(Integer interval) {
         MCUtil.ensureMain("Save Players" , () -> { // Paper - Ensure main
         MinecraftTimings.savePlayers.startTiming(); // Paper
+        int numSaved = 0;
+        long now = MinecraftServer.currentTick;
         for (int i = 0; i < this.players.size(); ++i) {
-            this.savePlayerFile(this.players.get(i));
+            EntityPlayer entityplayer = this.players.get(i);
+            if (interval == null || now - entityplayer.lastSave >= interval) {
+                this.savePlayerFile(entityplayer);
+                if (interval != null && ++numSaved <= dev.tr7zw.yatopia.YatopiaConfig.maxPlayerAutoSavePerTick) { break; }
+            }
+            // Yatopia end
         }
         MinecraftTimings.savePlayers.stopTiming(); // Paper
         return null; }); // Paper - ensure main