New Tweak: Remember Selected World

Tweaks/RememberSelectedWorld.cs

@@ -0,0 +1,56 @@
+using System.Collections.Generic;
+using FFXIVClientStructs.FFXIV.Client.UI.Agent;
+using FFXIVClientStructs.FFXIV.Component.GUI;
+using SimpleTweaksPlugin.Events;
+using SimpleTweaksPlugin.TweakSystem;
+using SimpleTweaksPlugin.Utility;
+
+namespace SimpleTweaksPlugin.Tweaks; 
+
+[TweakName("Remember Selected World")]
+[TweakDescription("Remembers which world was selected for each datacentre.")]
+[TweakReleaseVersion(UnreleasedVersion)]
+public unsafe class RememberSelectedWorld : Tweak {
+    private class Configs : TweakConfig {
+        public Dictionary<uint, short> DataCenterWorldSelect = new();
+    }
+
+    private Configs? Config { get; set; }
+    private short setting = -1;
+    private bool isSetting;
+
+    [AddonPreSetup("CharaSelect")]
+    private void AddonSetup() {
+        isSetting = true;
+        setting = -1;
+    }
+
+    [AddonPostUpdate("CharaSelect")]
+    public void AddonUpdate(AtkUnitBase* unitBase) {
+        var lobby = AgentLobby.Instance();
+        if (lobby == null || lobby->WorldId == 0 || lobby->WorldIndex < 0) return;
+        Config ??= LoadConfig<Configs>() ?? new Configs();
+
+        if (isSetting) {
+            if (setting == -1) {
+                if (Config.DataCenterWorldSelect.TryGetValue(lobby->DataCenter, out setting)) return;
+                isSetting = false;
+                return;
+            }
+
+            if (setting == lobby->WorldIndex) {
+                isSetting = false;
+                return;
+            }
+            SimpleLog.Verbose($"Setting selected world to Index#{setting}");
+            Common.GenerateCallback(unitBase, 10, 0, (int) setting);
+            Common.GenerateCallback(unitBase, 6, 0, 0);
+            setting = -1;
+            return;
+        }
+
+        if (Config.DataCenterWorldSelect.TryGetValue(lobby->DataCenter, out var worldIndex) && worldIndex == lobby->WorldIndex) return;
+        Config.DataCenterWorldSelect[lobby->DataCenter] = lobby->WorldIndex;
+        SaveConfig(Config);
+    }
+}