Initial commit

Infrastructure/Persistence/AuditRepository.cs

@@ -0,0 +1,50 @@
+using System.Text;
+using System.Text.Json;
+using SharepointToolbox.Web.Core.Models;
+
+namespace SharepointToolbox.Web.Infrastructure.Persistence;
+
+/// <summary>Append-only JSONL audit log. Each line is one AuditEntry JSON object.</summary>
+public class AuditRepository
+{
+    private readonly string _filePath;
+    private readonly SemaphoreSlim _writeLock = new(1, 1);
+    private static readonly JsonSerializerOptions _opts = new()
+    {
+        PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
+        PropertyNameCaseInsensitive = true
+    };
+
+    public AuditRepository(string filePath) { _filePath = filePath; }
+
+    public async Task AppendAsync(AuditEntry entry)
+    {
+        await _writeLock.WaitAsync();
+        try
+        {
+            var dir = Path.GetDirectoryName(_filePath);
+            if (!string.IsNullOrEmpty(dir)) Directory.CreateDirectory(dir);
+            var line = JsonSerializer.Serialize(entry, _opts) + "\n";
+            await File.AppendAllTextAsync(_filePath, line, Encoding.UTF8);
+        }
+        finally { _writeLock.Release(); }
+    }
+
+    public async Task<IReadOnlyList<AuditEntry>> LoadAllAsync()
+    {
+        if (!File.Exists(_filePath)) return Array.Empty<AuditEntry>();
+        var lines = await File.ReadAllLinesAsync(_filePath, Encoding.UTF8);
+        var result = new List<AuditEntry>(lines.Length);
+        foreach (var line in lines)
+        {
+            if (string.IsNullOrWhiteSpace(line)) continue;
+            try
+            {
+                var entry = JsonSerializer.Deserialize<AuditEntry>(line, _opts);
+                if (entry != null) result.Add(entry);
+            }
+            catch { /* skip corrupt lines */ }
+        }
+        return result;
+    }
+}