Add crash handler stuff.

Penumbra.CrashHandler/GameEventLogReader.cs

@@ -0,0 +1,53 @@
+using System.Text.Json.Nodes;
+using Penumbra.CrashHandler.Buffers;
+
+namespace Penumbra.CrashHandler;
+
+public interface IBufferReader
+{
+    public uint                    TotalCount { get; }
+    public IEnumerable<JsonObject> GetLines(DateTimeOffset crashTime);
+}
+
+public sealed class GameEventLogReader : IDisposable
+{
+    public readonly (IBufferReader Reader, string TypeSingular, string TypePlural)[] Readers =
+    [
+        (CharacterBaseBuffer.CreateReader(), "CharacterLoaded", "CharactersLoaded"),
+        (ModdedFileBuffer.CreateReader(), "ModdedFileLoaded", "ModdedFilesLoaded"),
+        (AnimationInvocationBuffer.CreateReader(), "VFXFuncInvoked", "VFXFuncsInvoked"),
+    ];
+
+    public void Dispose()
+    {
+        foreach (var (reader, _, _) in Readers)
+            (reader as IDisposable)?.Dispose();
+    }
+
+
+    public JsonObject Dump(string mode, int processId, int exitCode)
+    {
+        var crashTime = DateTimeOffset.UtcNow;
+        var obj = new JsonObject
+        {
+            [nameof(CrashData.Mode)]      = mode,
+            [nameof(CrashData.CrashTime)] = DateTimeOffset.UtcNow,
+            [nameof(CrashData.ProcessId)] = processId,
+            [nameof(CrashData.ExitCode)]  = exitCode,
+        };
+
+        foreach (var (reader, singular, _) in Readers)
+            obj["Last" + singular] = reader.GetLines(crashTime).FirstOrDefault();
+
+        foreach (var (reader, _, plural) in Readers)
+        {
+            obj["Total" + plural] = reader.TotalCount;
+            var array = new JsonArray();
+            foreach (var file in reader.GetLines(crashTime))
+                array.Add(file);
+            obj["Last" + plural] = array;
+        }
+
+        return obj;
+    }
+}