ScheduledDate should be in the future

Author: linkdotnet

src/LinkDotNet.Blog.Web/Features/Admin/BlogPostEditor/Components/CreateNewModel.cs

@@ -88,6 +88,7 @@ public bool ShouldUpdateDate
         }
     }
 
+    [FutureDateValidation]
     public DateTime? ScheduledPublishDate
     {
         get => scheduledPublishDate;

src/LinkDotNet.Blog.Web/Features/Admin/BlogPostEditor/Components/FallbackUrlValidationAttribute.cs

@@ -4,7 +4,7 @@
 namespace LinkDotNet.Blog.Web.Features.Admin.BlogPostEditor.Components;
 
 [AttributeUsage(AttributeTargets.Property)]
-public class FallbackUrlValidationAttribute : ValidationAttribute
+public sealed class FallbackUrlValidationAttribute : ValidationAttribute
 {
     protected override ValidationResult IsValid(object value, ValidationContext validationContext)
     {

src/LinkDotNet.Blog.Web/Features/Admin/BlogPostEditor/Components/FutureDateValidationAttribute.cs

@@ -0,0 +1,20 @@
+using System;
+using System.ComponentModel.DataAnnotations;
+
+namespace LinkDotNet.Blog.Web.Features.Admin.BlogPostEditor.Components;
+
+[AttributeUsage(AttributeTargets.Property)]
+public sealed class FutureDateValidationAttribute : ValidationAttribute
+{
+    protected override ValidationResult IsValid(object value, ValidationContext validationContext)
+    {
+        if (value is null)
+        {
+            return ValidationResult.Success;
+        }
+
+        return (DateTime)value <= DateTime.UtcNow
+            ? new ValidationResult("The scheduled publish date must be in the future.")
+            : ValidationResult.Success;
+    }
+}

tests/LinkDotNet.Blog.UnitTests/Web/Features/Admin/BlogPostEditor/Components/FutureDateValidationAttributeTests.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using LinkDotNet.Blog.Web.Features.Admin.BlogPostEditor.Components;
+
+namespace LinkDotNet.Blog.UnitTests.Web.Features.Admin.BlogPostEditor.Components;
+
+public class FutureDateValidationAttributeTests
+{
+    [Fact]
+    public void GivenScheduledDateIsInThePast_WhenValidating_ThenError()
+    {
+        var model = new CreateNewModel
+        {
+            Title = "Title",
+            ShortDescription = "Desc",
+            Content = "Content",
+            IsPublished = false,
+            ScheduledPublishDate = DateTime.Now.AddDays(-1),
+            PreviewImageUrl = "https://steven-giesel.com",
+        };
+        var validationContext = new ValidationContext(model);
+        var results = new List<ValidationResult>();
+
+        var result = Validator.TryValidateObject(model, validationContext, results, true);
+
+        result.Should().BeFalse();
+        results.Count.Should().Be(1);
+    }
+}