Set up notifier infrastructure

Penumbra/Import/Models/IoNotifier.cs

@@ -0,0 +1,52 @@
+using Dalamud.Interface.Internal.Notifications;
+using OtterGui.Classes;
+
+namespace Penumbra.Import.Models;
+
+public record class IoNotifier
+{
+    /// <summary> Notification subclass so that we have a distinct type to filter by. </summary>
+    private class LegallyDistinctNotification : Notification
+    {
+        public LegallyDistinctNotification(string content, NotificationType type): base(content, type)
+        {}
+    }
+
+    private readonly DateTime _startTime = DateTime.UtcNow;
+    private          string   _context   = "";
+
+    /// <summary> Create a new notifier with the specified context appended to any other context already present. </summary>
+    public IoNotifier WithContext(string context)
+        => this with { _context = $"{_context}{context}: "};
+
+    /// <summary> Send a warning with any current context to notification channels. </summary>
+    public void Warning(string content)
+        => SendNotification(content, NotificationType.Warning);
+
+    /// <summary> Get the current warnings for this notifier. </summary>
+    /// <remarks> This does not currently filter to notifications with the current notifier's context - it will return all IO notifications from all notifiers. </remarks>
+    public IEnumerable<string> GetWarnings()
+        => GetFilteredNotifications(NotificationType.Warning);
+
+    /// <summary> Create an exception with any current context. </summary>
+    [StackTraceHidden]
+    public Exception Exception(string message)
+        => Exception<Exception>(message);
+
+    /// <summary> Create an exception of the provided type with any current context. </summary>
+    [StackTraceHidden]
+    public TException Exception<TException>(string message)
+        where TException : Exception, new()
+        => (TException)Activator.CreateInstance(typeof(TException), $"{_context}{message}")!;
+
+    private void SendNotification(string message, NotificationType type)
+        => Penumbra.Messager.AddMessage(
+            new LegallyDistinctNotification($"{_context}{message}", type),
+            true, false, true, false
+        );
+
+    private IEnumerable<string> GetFilteredNotifications(NotificationType type)
+        => Penumbra.Messager
+            .Where(p => p.Key >= _startTime && p.Value is LegallyDistinctNotification && p.Value.NotificationType == type)
+            .Select(p => p.Value.PrintMessage);
+}

Penumbra/UI/AdvancedWindow/ModEditWindow.Models.MdlTab.cs

@@ -25,6 +25,7 @@ public partial class ModEditWindow
         private bool            _dirty;
         public  bool            PendingIo    { get; private set; }
         public  List<Exception> IoExceptions { get; private set; } = [];
+        public  List<string>    IoWarnings   { get; private set; } = [];
 
         public MdlTab(ModEditWindow edit, byte[] bytes, string path)
         {

Penumbra/UI/AdvancedWindow/ModEditWindow.Models.cs

@@ -63,6 +63,7 @@ public partial class ModEditWindow
         DrawExport(tab, childSize, disabled);
 
         DrawIoExceptions(tab);
+        DrawIoWarnings(tab);
     }
 
     private void DrawImport(MdlTab tab, Vector2 size, bool _1)
@@ -148,9 +149,45 @@ public partial class ModEditWindow
 
             using var exceptionNode = ImRaii.TreeNode(message);
             if (exceptionNode)
+            {
+                ImGui.Dummy(new Vector2(ImGui.GetStyle().IndentSpacing, 0));
+                ImGui.SameLine();
                 ImGuiUtil.TextWrapped(exception.ToString());
             }
         }
+    }
+
+    private static void DrawIoWarnings(MdlTab tab)
+    {
+        if (tab.IoWarnings.Count == 0)
+            return;
+
+        var size = new Vector2(ImGui.GetContentRegionAvail().X, 0);
+        using var frame = ImRaii.FramedGroup("Warnings", size, headerPreIcon: FontAwesomeIcon.ExclamationCircle, borderColor: 0xFF40FFFF);
+
+        var spaceAvail = ImGui.GetContentRegionAvail().X - ImGui.GetStyle().ItemSpacing.X - 100;
+        foreach (var (warning, index) in tab.IoWarnings.WithIndex())
+        {
+            using var id       = ImRaii.PushId(index);
+            var       textSize = ImGui.CalcTextSize(warning).X;
+
+            if (textSize <= spaceAvail)
+            {
+                ImRaii.TreeNode(warning, ImGuiTreeNodeFlags.Leaf).Dispose();
+                continue;
+            }
+
+            var firstLine = warning[..(int)Math.Floor(warning.Length * (spaceAvail / textSize))] + "...";
+
+            using var warningNode = ImRaii.TreeNode(firstLine);
+            if (warningNode)
+            {
+                ImGui.Dummy(new Vector2(ImGui.GetStyle().IndentSpacing, 0));
+                ImGui.SameLine();
+                ImGuiUtil.TextWrapped(warning.ToString());
+            }
+        }
+    }
 
     private void DrawGamePathCombo(MdlTab tab)
     {