Add project files.

SaxoniteCoreWeb/Base/Middleware/SaxModelBinder.cs

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+using Microsoft.AspNetCore.Mvc.ModelBinding;
+using Microsoft.AspNetCore.Mvc.ModelBinding.Binders;
+using Sarand.Net.Standard.Base.App;
+using Sarand.Net.Standard.Base.Core;
+using Sarand.Net.Standard.Base.Utils;
+using Saxonite.Net.Core.Web.Base.App;
+using Saxonite.Net.Standard.Base.App;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Text.RegularExpressions;
+
+namespace Saxonite.Net.Core.Web.Base.Middleware
+{
+	//=======================================================================
+	/// <summary>
+	/// Maps a browser request to a data object. Default class provides a base implementation of a model binder.
+	/// <para>Overridden to trim whitespace from input values.</para>
+	/// </summary>
+	public class SaxModelBinder : ComplexTypeModelBinder
+	{
+		//-------------------------------------------------------------------
+		// Construction.
+		public SaxModelBinder(IDictionary<ModelMetadata, IModelBinder> propertyBinders, Microsoft.Extensions.Logging.ILoggerFactory loggerFactory) :
+			base(propertyBinders, loggerFactory)
+		{
+		}
+
+		//-------------------------------------------------------------------
+		/// <summary>
+		/// Creates the model with one (or more) injected service parameters.
+		/// </summary>
+		protected override object CreateModel(ModelBindingContext bindingContext)
+		{
+			var services = bindingContext.HttpContext.RequestServices;
+			var modelType = bindingContext.ModelType;
+			var ctors = modelType.GetConstructors();
+			foreach (var ctor in ctors)
+			{
+				var paramTypes = ctor.GetParameters().Select(p => p.ParameterType).ToList();
+				var parameters = paramTypes.Select(p => services.GetService(p)).ToArray();
+				if (parameters.All(p => p != null))
+				{
+					var model = ctor.Invoke(parameters);
+					return model;
+				}
+			}
+			return null;
+		}
+
+		//-------------------------------------------------------------------
+		/// <summary>
+		/// Intercept String properties and trim whitespace.
+		/// </summary>
+		protected override void SetProperty(ModelBindingContext bindingContext, string modelName, ModelMetadata propertyMetadata, ModelBindingResult result)
+		{
+			string fn = GetType().Name + ".SetProperty";
+			//if (SaxSystem.DebugMode) Logger.Debug(fn + " Form property " + modelName + ": '" + result.Model.ToString() + ".");
+			object originalValue = result.Model;
+			// Exclude properties that retain leading/trailing whitespace.
+			if (result.Model is string)
+			{
+				if (!modelName.ContainsCI("Password"))
+				{
+					string value = result.Model as string;
+
+					// Trim leading and trailing whitespace.
+					value = StringUtil.TrimAll(value);
+
+					// Check for multi-line.
+					if (value.Contains('\n'))
+					{
+						// Simplify line delimiters.
+						value = Regex.Replace(value, "\\r\\n", "\n");
+						// Remove white space in front of newlines.
+						value = Regex.Replace(value, "\\s+\\n", "\n");
+						// Remove multiple newlines.
+						value = Regex.Replace(value, "\\n+", "\n");
+					}
+
+					// Email addresses must be lowercase to ensure match to encrypted data.
+					if (modelName.EqualsCI("EmailAddress") || modelName.EqualsCI("AccountEmailAddress"))
+						value = value.ToLower();
+
+					// Uppercase selected values.
+					if (modelName.EqualsCI("Postcode") || modelName.EqualsCI("AccountPostcode") || modelName.EqualsCI("RegisteredAddressPostcode"))
+						value = value.ToUpper();
+
+					// Assign resulting value.
+					result = ModelBindingResult.Success(value);
+				}
+			}
+			if (result.Model != null && SaxSystem.DebugMode)
+				SaLogger.Debug(fn + " Form property " + modelName + ": '" + result.Model.ToString() + "'." + (originalValue != null && !originalValue.Equals(result.Model) ? " Original value: '" + originalValue.ToString() + "'" : ""));
+			base.SetProperty(bindingContext, modelName, propertyMetadata, result);
+		}
+
+		//-------------------------------------------------------------------
+	}
+	//=======================================================================
+}