Add download links

Web/Controllers/LeafCharterController.cs

@@ -94,10 +94,13 @@ namespace LeafWeb.Web.Controllers
 
 		private Bitmap CombineBitmaps(IList<Bitmap> bitmaps, int columnCount = 2)
 		{
+			if (!bitmaps.Any())
+				return null;
+			// bitmaps assumed to have same dimensions, use the first one to define that
 			var cellWidth = bitmaps[0].Width;
 			var cellHeight = bitmaps[0].Height;
-			var width = cellWidth * 2;
-			var height = cellHeight * bitmaps.Count / 2;
+			var width = cellWidth * columnCount;
+			var height = cellHeight * bitmaps.Count / columnCount;
 
 			var combinedBitmap = new Bitmap(width, height);
 			using (var g = Graphics.FromImage(combinedBitmap))

Web/Controllers/LeafInputController.cs

@@ -100,6 +100,7 @@ namespace LeafWeb.Web.Controllers
 			return View("Index", viewModel);
 		}
 
+		// Callback from Piscal
 		public void NotifyComplete()
 		{
 			HangfireStartup.TriggerPiscalProcessQueue();

Web/Controllers/ResultsController.cs

@@ -19,9 +19,12 @@ namespace LeafWeb.Web.Controllers
 		}
 
 		[ActionLog]
-		public FileContentResult DownloadResults(int id)
+		public ActionResult Download(string token)
 		{
-			var leafInput = DataService.GetLeafInput(id);
+			var leafInput = DataService.GetLeafInput(token);
+
+			if (leafInput == null)
+				return View("DownloadNotFound");
 
 			var zip = leafInput.GetOutputFileZip();