From 0611f5d6954cb35cf10ea5a1163113deb83d2bfa Mon Sep 17 00:00:00 2001
From: Len <40720638+destro174@users.noreply.github.com>
Date: Tue, 24 May 2022 21:03:47 +0200
Subject: [PATCH] revert e18ec1

---
 .../GriefPrevention/GriefPrevention.java      | 51 ++++++++++++++++++-
 1 file changed, 50 insertions(+), 1 deletion(-)

diff --git a/src/main/java/me/ryanhamshire/GriefPrevention/GriefPrevention.java b/src/main/java/me/ryanhamshire/GriefPrevention/GriefPrevention.java
index 8ad2a1c..e2258d7 100644
--- a/src/main/java/me/ryanhamshire/GriefPrevention/GriefPrevention.java
+++ b/src/main/java/me/ryanhamshire/GriefPrevention/GriefPrevention.java
@@ -374,6 +374,12 @@ public class GriefPrevention extends JavaPlugin
         economyHandler = new EconomyHandler(this);
         pluginManager.registerEvents(economyHandler, this);
 
+        //cache offline players
+        OfflinePlayer[] offlinePlayers = this.getServer().getOfflinePlayers();
+        CacheOfflinePlayerNamesThread namesThread = new CacheOfflinePlayerNamesThread(offlinePlayers, this.playerNameToIDMap);
+        namesThread.setPriority(Thread.MIN_PRIORITY);
+        namesThread.start();
+
         new AltitudeListener(this.dataStore, this);
         if (getServer().getPluginManager().isPluginEnabled("Pl3xMap")) {
             pl3xmapHook = new Pl3xMapHook(this);
@@ -2744,7 +2750,50 @@ public class GriefPrevention extends JavaPlugin
     }
 
     //helper method to resolve a player by name
-    ConcurrentHashMap<String, UUID> playerNameToIDMap = new ConcurrentHashMap<>(); // TODO REMOVE ME
+    ConcurrentHashMap<String, UUID> playerNameToIDMap = new ConcurrentHashMap<>();
+
+    //thread to build the above cache
+    private class CacheOfflinePlayerNamesThread extends Thread
+    {
+        private final OfflinePlayer[] offlinePlayers;
+        private final ConcurrentHashMap<String, UUID> playerNameToIDMap;
+
+        CacheOfflinePlayerNamesThread(OfflinePlayer[] offlinePlayers, ConcurrentHashMap<String, UUID> playerNameToIDMap)
+        {
+            this.offlinePlayers = offlinePlayers;
+            this.playerNameToIDMap = playerNameToIDMap;
+        }
+
+        public void run()
+        {
+            long now = System.currentTimeMillis();
+            final long millisecondsPerDay = 1000 * 60 * 60 * 24;
+            for (OfflinePlayer player : offlinePlayers)
+            {
+                try
+                {
+                    UUID playerID = player.getUniqueId();
+                    if (playerID == null) continue;
+                    long lastSeen = player.getLastPlayed();
+
+                    //if the player has been seen in the last 90 days, cache his name/UUID pair
+                    long diff = now - lastSeen;
+                    long daysDiff = diff / millisecondsPerDay;
+                    if (daysDiff <= config_advanced_offlineplayer_cache_days)
+                    {
+                        String playerName = player.getName();
+                        if (playerName == null) continue;
+                        this.playerNameToIDMap.put(playerName, playerID);
+                        this.playerNameToIDMap.put(playerName.toLowerCase(), playerID);
+                    }
+                }
+                catch (Exception e)
+                {
+                    e.printStackTrace();
+                }
+            }
+        }
+    }
 
 
     public OfflinePlayer resolvePlayerByName(String name)