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MyOffice.Web/Infrastructure/Attributes/AsGuidAttribute.cs

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+namespace MyOffice.Web.Infrastructure.Attributes
+{
+	using System.ComponentModel.DataAnnotations;
+	using Core.Extensions;
+
+	public class AsGuidAttribute: ValidationAttribute
+	{
+		private readonly bool _nullable;
+
+		public AsGuidAttribute(bool nullable = false)
+		{
+			_nullable = nullable;
+		}
+
+		protected override ValidationResult? IsValid(object? value, ValidationContext validationContext)
+		{
+			if (value == null && _nullable)
+			{
+				return ValidationResult.Success;
+			}
+
+			if (value == null || value.ToString().IsMissing())
+			{
+				return new ValidationResult("Id parameter is not valid");
+			}
+
+			if (!Guid.TryParse(value.ToString(), out _))
+			{
+				return new ValidationResult("Id parameter is not valid");
+			}
+
+			return ValidationResult.Success;
+		}
+	}
+}