Move PlayerProfile saving off the main thread

src/main/java/io/github/thebusybiscuit/slimefun4/api/player/PlayerProfile.java

@@ -8,7 +8,6 @@
 import java.util.Set;
 import java.util.UUID;
 import java.util.function.Consumer;
-import java.util.stream.IntStream;
 
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
@@ -35,6 +34,8 @@
 import io.github.thebusybiscuit.slimefun4.api.researches.Research;
 import io.github.thebusybiscuit.slimefun4.core.attributes.ProtectionType;
 import io.github.thebusybiscuit.slimefun4.core.attributes.ProtectiveArmor;
+import io.github.thebusybiscuit.slimefun4.core.debug.Debug;
+import io.github.thebusybiscuit.slimefun4.core.debug.TestCase;
 import io.github.thebusybiscuit.slimefun4.core.guide.GuideHistory;
 import io.github.thebusybiscuit.slimefun4.implementation.Slimefun;
 import io.github.thebusybiscuit.slimefun4.implementation.items.armor.SlimefunArmorPiece;
@@ -237,13 +238,15 @@ public void removeWaypoint(@Nonnull Waypoint waypoint) {
      * The profile can then be removed from RAM.
      */
     public final void markForDeletion() {
+        Debug.log(TestCase.PLAYER_PROFILE_DATA, "Marking {} ({}) profile for deletion", name, ownerId);
         markedForDeletion = true;
     }
 
     /**
      * Call this method if this Profile has unsaved changes.
      */
     public final void markDirty() {
+        Debug.log(TestCase.PLAYER_PROFILE_DATA, "Marking {} ({}) profile as dirty", name, ownerId);
         dirty = true;
     }
 

src/main/java/io/github/thebusybiscuit/slimefun4/core/commands/SlimefunTabCompleter.java

@@ -16,6 +16,7 @@
 
 import io.github.thebusybiscuit.slimefun4.api.items.SlimefunItem;
 import io.github.thebusybiscuit.slimefun4.api.researches.Research;
+import io.github.thebusybiscuit.slimefun4.core.debug.TestCase;
 import io.github.thebusybiscuit.slimefun4.implementation.Slimefun;
 
 class SlimefunTabCompleter implements TabCompleter {
@@ -33,6 +34,13 @@ public SlimefunTabCompleter(@Nonnull SlimefunCommand command) {
     public List<String> onTabComplete(CommandSender sender, Command cmd, String label, String[] args) {
         if (args.length == 1) {
             return createReturnList(command.getSubCommandNames(), args[0]);
+        } else if (args.length == 2) {
+            if (args[0].equalsIgnoreCase("debug")) {
+                return createReturnList(TestCase.VALUES_LIST, args[1]);
+            } else {
+                // Returning null will make it fallback to the default arguments (all online players)
+                return null;
+            }
         } else if (args.length == 3) {
             if (args[0].equalsIgnoreCase("give")) {
                 return createReturnList(getSlimefunItems(), args[2]);

src/main/java/io/github/thebusybiscuit/slimefun4/core/debug/TestCase.java

@@ -1,5 +1,7 @@
 package io.github.thebusybiscuit.slimefun4.core.debug;
 
+import java.util.Arrays;
+import java.util.List;
 import java.util.Locale;
 
 import javax.annotation.Nonnull;
@@ -17,7 +19,15 @@ public enum TestCase {
      * being checked and why it is comparing IDs or meta.
      * This is helpful for us to check into why input nodes are taking a while for servers.
      */
-    CARGO_INPUT_TESTING;
+    CARGO_INPUT_TESTING,
+
+    /**
+     * Debug information regarding player profile loading, saving and handling.
+     * This is an area we're currently changing quite a bit and this will help ensure we're doing it safely
+     */
+    PLAYER_PROFILE_DATA;
+
+    public static final List<String> VALUES_LIST = Arrays.stream(values()).map(TestCase::toString).toList();
 
     TestCase() {}
 

src/main/java/io/github/thebusybiscuit/slimefun4/core/services/AutoSavingService.java

@@ -13,6 +13,8 @@
 import org.bukkit.entity.Player;
 
 import io.github.thebusybiscuit.slimefun4.api.player.PlayerProfile;
+import io.github.thebusybiscuit.slimefun4.core.debug.Debug;
+import io.github.thebusybiscuit.slimefun4.core.debug.TestCase;
 import io.github.thebusybiscuit.slimefun4.implementation.Slimefun;
 
 import me.mrCookieSlime.Slimefun.api.BlockStorage;
@@ -39,9 +41,8 @@ public class AutoSavingService {
     public void start(@Nonnull Slimefun plugin, int interval) {
         this.interval = interval;
 
-        plugin.getServer().getScheduler().runTaskTimer(plugin, this::saveAllPlayers, 2000L, interval * 60L * 20L);
+        plugin.getServer().getScheduler().runTaskTimerAsynchronously(plugin, this::saveAllPlayers, 2000L, interval * 60L * 20L);
         plugin.getServer().getScheduler().runTaskTimerAsynchronously(plugin, this::saveAllBlocks, 2000L, interval * 60L * 20L);
-
     }
 
     /**
@@ -52,16 +53,30 @@ private void saveAllPlayers() {
         Iterator<PlayerProfile> iterator = PlayerProfile.iterator();
         int players = 0;
 
+        Debug.log(TestCase.PLAYER_PROFILE_DATA, "Saving all players data");
+
         while (iterator.hasNext()) {
             PlayerProfile profile = iterator.next();
 
             if (profile.isDirty()) {
                 players++;
                 profile.save();
+
+                Debug.log(TestCase.PLAYER_PROFILE_DATA, "Saved data for {} ({})",
+                    profile.getPlayer() != null ? profile.getPlayer().getName() : "Unknown", profile.getUUID()
+                );
             }
 
-            if (profile.isMarkedForDeletion()) {
+            // Remove the PlayerProfile from memory if the player has left the server (marked from removal)
+            // and they're still not on the server
+            // At this point, we've already saved their profile so we can safely remove it
+            // without worry for having a data sync issue (e.g. data is changed but then we try to re-load older data)
+            if (profile.isMarkedForDeletion() && profile.getPlayer() == null) {
                 iterator.remove();
+
+                Debug.log(TestCase.PLAYER_PROFILE_DATA, "Removed data from memory for {}",
+                    profile.getUUID()
+                );
             }
         }