Refactoring

AMWD.Common.AspNetCore/Extensions/HtmlExtensions.cs

@@ -0,0 +1,80 @@
+using System;
+using Microsoft.AspNetCore.Mvc.Razor;
+using Microsoft.AspNetCore.Mvc.Rendering;
+
+namespace AMWD.Common.AspNetCore.Extensions
+{
+	/// <summary>
+	/// Extensions for the HTML (e.g. <see cref="IHtmlHelper"/>).
+	/// </summary>
+	public static class HtmlExtensions
+	{
+		/// <summary>
+		/// The prefix used to identify JavaScript parts.
+		/// </summary>
+		public static string JSPrefix { get; set; } = "_JS_";
+
+		/// <summary>
+		/// The prefix used to identify CascadingStyleSheet parts.
+		/// </summary>
+		public static string CSSPrefix { get; set; } = "_CSS_";
+
+		/// <summary>
+		/// Add a js snippet.
+		/// </summary>
+		/// <typeparam name="T">The dynamic type of the <see cref="IHtmlHelper"/>.</typeparam>
+		/// <param name="htmlHelper">The <see cref="IHtmlHelper"/> instance.</param>
+		/// <param name="template">The template to use to add the snippet.</param>
+		/// <returns></returns>
+		public static T AddJS<T>(this IHtmlHelper<T> htmlHelper, Func<object, HelperResult> template)
+		{
+			htmlHelper.ViewContext.HttpContext.Items[$"{JSPrefix}{Guid.NewGuid()}"] = template;
+			return default;
+		}
+
+		/// <summary>
+		/// Renders the js snippets into the view.
+		/// </summary>
+		/// <typeparam name="T">The dynamic type of the <see cref="IHtmlHelper"/>.</typeparam>
+		/// <param name="htmlHelper">The <see cref="IHtmlHelper"/> instance.</param>
+		/// <returns></returns>
+		public static T RenderJS<T>(this IHtmlHelper<T> htmlHelper)
+		{
+			foreach (object key in htmlHelper.ViewContext.HttpContext.Items.Keys)
+			{
+				if (key.ToString().StartsWith(JSPrefix) && htmlHelper.ViewContext.HttpContext.Items[key] is Func<object, HelperResult> template)
+					htmlHelper.ViewContext.Writer.WriteLine(template(null));
+			}
+			return default;
+		}
+
+		/// <summary>
+		/// Add a css snippet.
+		/// </summary>
+		/// <typeparam name="T">The dynamic type of the <see cref="IHtmlHelper"/>.</typeparam>
+		/// <param name="htmlHelper">The <see cref="IHtmlHelper"/> instance.</param>
+		/// <param name="template">The template to use to add the snippet.</param>
+		/// <returns></returns>
+		public static T AddCSS<T>(this IHtmlHelper<T> htmlHelper, Func<object, HelperResult> template)
+		{
+			htmlHelper.ViewContext.HttpContext.Items[$"{CSSPrefix}{Guid.NewGuid()}"] = template;
+			return default;
+		}
+
+		/// <summary>
+		/// Renders the css snippets into the view.
+		/// </summary>
+		/// <typeparam name="T">The dynamic type of the <see cref="IHtmlHelper"/>.</typeparam>
+		/// <param name="htmlHelper">The <see cref="IHtmlHelper"/> instance.</param>
+		/// <returns></returns>
+		public static T RenderCSS<T>(this IHtmlHelper<T> htmlHelper)
+		{
+			foreach (object key in htmlHelper.ViewContext.HttpContext.Items.Keys)
+			{
+				if (key.ToString().StartsWith(CSSPrefix) && htmlHelper.ViewContext.HttpContext.Items[key] is Func<object, HelperResult> template)
+					htmlHelper.ViewContext.Writer.WriteLine(template(null));
+			}
+			return default;
+		}
+	}
+}