start new controllers

zero.Backoffice/Controllers/ZeroBackofficeControllerExtensions.cs

@@ -0,0 +1,115 @@
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.StaticFiles;
+using System.IO;
+
+namespace zero.Backoffice.Controllers;
+
+public static class ZeroBackofficeControllerExtensions
+{
+  /// <summary>
+  /// Transform entities to a preview list
+  /// </summary>
+  public static List<PreviewModel> TransformToPreviewModels<T>(this ZeroBackofficeController controller, Dictionary<string, T> items, Action<T, PreviewModel> transform = null) where T : ZeroIdEntity
+  {
+    List<PreviewModel> previews = new();
+
+    foreach (var item in items)
+    {
+      if (item.Value == null)
+      {
+        previews.Add(new PreviewModel()
+        {
+          HasError = true,
+          Icon = "fth-alert-circle color-red",
+          Id = item.Key,
+          Name = "@errors.preview.notfound",
+          Text = "@errors.preview.notfound_text"
+        });
+        continue;
+      }
+
+      PreviewModel model = new() { Id = item.Value.Id };
+
+      if (item.Value is ZeroEntity)
+      {
+        model.Name = (item.Value as ZeroEntity).Name;
+      }
+
+      transform?.Invoke(item.Value, model);
+      previews.Add(model);
+    }
+
+    return previews;
+  }
+
+
+  /// <summary>
+  /// Transform entities to a select list
+  /// </summary>
+  public static List<SelectModel> TransformToSelectModels<T>(this ZeroBackofficeController controller, IEnumerable<T> enumerable, Action<T, SelectModel> transform = null) where T : ZeroIdEntity
+  {
+    List<SelectModel> items = new();
+
+    foreach (T item in enumerable)
+    {
+      SelectModel model = new()
+      {
+        Id = item.Id
+      };
+
+      if (item is ZeroEntity)
+      {
+        model.Name = (item as ZeroEntity).Name;
+        model.IsActive = (item as ZeroEntity).IsActive;
+      }
+
+      transform?.Invoke(item, model);
+
+      items.Add(model);
+    }
+
+    return items;
+  }
+
+
+  /// <summary>
+  /// Provides a file stream for download in the browser
+  /// </summary>
+  public static IActionResult DownloadFile(this ZeroBackofficeController controller, Stream stream, string filename)
+  {
+    if (stream == null)
+    {
+      // TODO add success property + return error response
+    }
+
+    if (filename.Contains("{date}"))
+    {
+      filename = filename.Replace("{date}", DateTimeOffset.Now.ToString("yyyy-MM-dd"));
+    }
+
+    var provider = new FileExtensionContentTypeProvider();
+    if (filename == null || !provider.TryGetContentType(Path.GetFileName(filename), out string contentType))
+    {
+      contentType = "application/octet-stream";
+    }
+
+    controller.Response.Headers.Add("zero-filename", filename);
+
+    return controller.File(stream, contentType, filename, true);
+  }
+
+
+  /// <summary>
+  /// Provides a file stream to the browser
+  /// </summary>
+  public static IActionResult File(this ZeroBackofficeController controller, FileStorage.FileResult file)
+  {
+    if (file == null)
+    {
+      return controller.NotFound();
+    }
+
+    FileStream stream = System.IO.File.OpenRead(file.Path);
+    return controller.File(stream, file.ContentType, file.Filename);
+  }
+}