Löschen implementiert

Components/Pages/Storage.razor

@@ -57,6 +57,7 @@
                 <MudTh>Geändert</MudTh>
                 <MudTh></MudTh>
                 <MudTh></MudTh>
+                <MudTh></MudTh>
             </HeaderContent>
             <RowTemplate>
                 <MudTd DataLabel="Key">@context.Key</MudTd>
@@ -73,10 +74,17 @@
                     }
                     <MudButton Variant="Variant.Outlined" Color="Color.Primary" Href="@($"/api/storage/buckets/{selectedBucket}/files/{encodedName}/download")" Target="_blank" StartIcon="@Icons.Material.Filled.Download">Download by Name</MudButton>
                 </MudTd>
+
+                <MudTd>
+                    <MudButton Variant="Variant.Text" Color="Color.Error" StartIcon="@Icons.Material.Filled.Delete"
+                               OnClick="@(async () => await ConfirmAndDelete(context.Key))">
+                        Löschen
+                    </MudButton>
+                </MudTd>
             </RowTemplate>
         </MudTable>
     </MudPaper>
-}
+    }
 
 @code {
     private record BucketVm(string Name, DateTime? CreationDate);
@@ -149,4 +157,41 @@
     }
 
 
+    private async Task ConfirmAndDelete(string key)
+    {
+        // Simple Bestätigung; alternativ MudDialog verwenden
+        var really = await JSConfirm($"Objekt löschen?\n\nBucket: {selectedBucket}\nKey: {key}");
+        if (really)
+        {
+            await DeleteObject(key);
+        }
+    }
+
+
+    private async Task DeleteObject(string key)
+    {
+        if (string.IsNullOrEmpty(selectedBucket)) return;
+
+        var encodedKey = Uri.EscapeDataString(key);
+        var url = $"/api/storage/buckets/{selectedBucket}/objects/{encodedKey}";
+
+        var resp = await Http!.DeleteAsync(url);
+        if (resp.IsSuccessStatusCode)
+        {
+            // Liste aktualisieren
+            objects = await Http!.GetFromJsonAsync<List<ObjectVm>>($"/api/storage/buckets/{selectedBucket}/objects") ?? new();
+            StateHasChanged();
+        }
+        else
+        {
+            var msg = await resp.Content.ReadAsStringAsync();
+            throw new InvalidOperationException($"Delete fehlgeschlagen: {(int)resp.StatusCode} {resp.ReasonPhrase}\n{msg}");
+        }
+    }
+
+    // Sehr einfache JS-Confirm-Hilfe (füge IJSRuntime-Injection hinzu)
+    [Inject] private IJSRuntime JS { get; set; } = default!;
+    private async Task<bool> JSConfirm(string message)
+        => await JS.InvokeAsync<bool>("confirm", message);
 }
+

Program.cs

@@ -178,5 +178,19 @@ storage.MapGet("/buckets/{bucket}/files/{fileName}/download", async (
 });
 
 
+storage.MapDelete("/buckets/{bucket}/objects/{*key}", async(
+IStorageService svc,
+IStorageMetadataRepository meta,
+string bucket,
+string key,
+CancellationToken ct) =>
+ {
+    await svc.DeleteObjectAsync(bucket, key);
+    await meta.DeleteByKeyAsync(bucket, key, ct);
+         return Results.NoContent();
+     });
+
+
+
 
 app.Run();

Services/IStorageService.cs

@@ -9,5 +9,6 @@ public interface IStorageService
     Task CreateBucketAsync(string bucketName, CancellationToken ct = default);
     Task<IEnumerable<ObjectItem>> ListObjectsAsync(string bucket, CancellationToken ct = default);
     Task UploadObjectAsync(string bucket, string key, Stream content, string contentType, CancellationToken ct = default);
+    Task DeleteObjectAsync(string bucket, string key);
     Task<(Stream Stream, string ContentType, long? ContentLength)> GetObjectAsync(string bucket, string key, CancellationToken ct = default);
 }

Services/S3StorageService.cs

@@ -74,4 +74,15 @@ public sealed class S3StorageService(IAmazonS3 s3) : IStorageService
         return (resp.ResponseStream, contentType, len);
     }
 
+
+    public async Task DeleteObjectAsync(string bucket, string key)
+    {
+        // S3-Delete ist idempotent: 204 auch wenn das Objekt nicht existiert.
+        await _s3.DeleteObjectAsync(new Amazon.S3.Model.DeleteObjectRequest
+        {
+            BucketName = bucket,
+            Key = key
+        });
+    }
+
 }

Services/Storage/IStorageMetadataRepository.cs

@@ -6,6 +6,7 @@ public interface IStorageMetadataRepository
     Task EnsureSchemaAsync(CancellationToken ct = default);
     Task UpsertAsync(string bucket, string fileName, string? path, string key, long? size, string? contentType, CancellationToken ct = default);
     Task<StorageObject?> TryGetAsync(string bucket, string fileName, CancellationToken ct = default);
+    Task DeleteByKeyAsync(string bucket, string key, CancellationToken ct = default);
 }
 
 public sealed record StorageObject(

Services/Storage/StorageMetaDataRepository.cs

@@ -90,4 +90,19 @@ public sealed class StorageMetadataRepository : IStorageMetadataRepository
         }
         return null;
     }
+
+    public async Task DeleteByKeyAsync(string bucket, string key, CancellationToken ct = default)
+    {
+        const string sql = """
+        DELETE FROM storage_objects
+        WHERE bucket = @bucket AND s3_key = @key;
+        """;
+        await using var conn = new MySqlConnector.MySqlConnection(_connStr);
+        await conn.OpenAsync(ct);
+        await using var cmd = new MySqlConnector.MySqlCommand(sql, conn);
+        cmd.Parameters.AddWithValue("@bucket", bucket);
+        cmd.Parameters.AddWithValue("@key", key);
+        await cmd.ExecuteNonQueryAsync(ct);
+    }
+
 }