Added gallery artworks caching

MyWebsite/MyWebsite/Areas/Admin/Controllers/GalleryController.cs

@@ -6,6 +6,8 @@ using MyWebsite.Models;
 using MyWebsite.Models.Databases;
 using System;
 using System.IO;
+using System.Drawing;
+using System.Threading;
 
 namespace MyWebsite.Areas.Admin.Controllers
 {
@@ -50,6 +52,8 @@ namespace MyWebsite.Areas.Admin.Controllers
 			System.IO.File.SetAttributes(Directory.GetCurrentDirectory() + "/wwwroot/images/Gallery/" + model?.FileName, FileAttributes.Normal);
 			System.IO.File.Delete(Directory.GetCurrentDirectory() + "/wwwroot/images/Gallery/" + model?.FileName);
 
+			UpdateCache();
+
 			return RedirectToAction("Index");
 		}
 
@@ -79,6 +83,39 @@ namespace MyWebsite.Areas.Admin.Controllers
 			Database.Gallery.Add(model);
 			Database.SaveChanges();
 
+			UpdateCache();
+
+			return RedirectToAction("Index");
+		}
+
+		[HttpGet]
+		public IActionResult UpdateCache()
+		{
+			if (Directory.Exists(Directory.GetCurrentDirectory() + "/wwwroot/images/Gallery/Cache"))
+				Directory.Delete(Directory.GetCurrentDirectory() + "/wwwroot/images/Gallery/Cache", true);
+
+			Thread.Sleep(10);
+			DirectoryInfo cache = Directory.CreateDirectory(Directory.GetCurrentDirectory() + "/wwwroot/images/Gallery/Cache");
+
+			foreach (string file in Directory.GetFiles(Directory.GetCurrentDirectory() + "/wwwroot/images/Gallery"))
+			{
+				if (file.EndsWith(".svg", StringComparison.OrdinalIgnoreCase))
+					continue;
+
+				FileInfo info = new FileInfo(file);
+
+				using Bitmap original = new Bitmap(file);
+				using Bitmap resized = new Bitmap(600, (int)(600d / original.Width * original.Height));
+				using Graphics grapics = Graphics.FromImage(resized);
+
+				grapics.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighSpeed;
+				grapics.CompositingMode = System.Drawing.Drawing2D.CompositingMode.SourceCopy;
+				grapics.DrawImage(original, 0, 0, resized.Width, resized.Height);
+
+				using Stream writeStream = System.IO.File.Open(cache.FullName + "\\" + info.Name + ".jpg", FileMode.Create);
+				resized.Save(writeStream, System.Drawing.Imaging.ImageFormat.Jpeg);
+			}
+
 			return RedirectToAction("Index");
 		}
 	}

MyWebsite/MyWebsite/Areas/Admin/Views/Gallery/Index.cshtml

@@ -6,7 +6,8 @@
 <header>
 	&#xE760; <a asp-action="Index" asp-controller="Admin" asp-area="">Back to main menu</a>
 	<h1>Gallery</h1>
-	<a asp-action="Upload" class="comment">// &#xE11C; Upload new</a>
+	<a asp-action="Upload" class="comment">// &#xE11C; Upload new</a><br />
+	<a asp-action="UpdateCache" class="comment">// Cache gallery</a>
 </header>
 
 <article>
@@ -16,7 +17,7 @@
 			<tr>
 				<td>
 					<a asp-area="" asp-controller="Gallery" asp-action="Details" asp-route-id="@item.FileName" target="_blank">
-						<img title="@item.Title" src="~/images/Gallery/@item.FileName" />
+						<img title="@item.Title" src="~/images/Gallery/@(item.FileName.EndsWith(".svg", StringComparison.OrdinalIgnoreCase) ? item.FileName : $"Cache/{item.FileName}.jpg")" onerror="this.src = '/images/Gallery/@item.FileName'" />
 					</a>
 				</td>
 				<td>

MyWebsite/MyWebsite/Views/Gallery/Index.cshtml

@@ -11,7 +11,7 @@
 	@if (Model.Images.Count > 0)
 		foreach (ImageModel image in Model.Images)
 		{
-			<a asp-action="Details" asp-route-id="@image.FileName"><img title="@image.Title" src="~/images/Gallery/@image.FileName" /></a>
+			<a asp-action="Details" asp-route-id="@image.FileName"><img title="@image.Title" src="~/images/Gallery/@(image.FileName.EndsWith(".svg", StringComparison.OrdinalIgnoreCase) ? image.FileName : $"Cache/{image.FileName}.jpg")" onerror="this.src = '/images/Gallery/@image.FileName'" /></a>
 		}
 	else
 	{