Got the sliders extracted to their own page

OpenArchival.Blazor.AdminPages.Shared/ArchiveItems/ValidationModels/ArtifactEntryValidationModel.cs

@@ -3,22 +3,20 @@
 using OpenArchival.DataAccess;
 using System.ComponentModel.DataAnnotations;
 
-public class ArtifactEntryValidationModel 
+public class ArtifactEntryValidationModel:IValidatableObject 
 {
     /// <summary>
     /// Used when translating between the validation model and the database model
     /// </summary>
     public int? Id { get; set; }
 
-    [Required(AllowEmptyStrings = false, ErrorMessage = "An artifact numbering must be supplied")]
-    public string? ArtifactNumber { get; set; }
+    public string ArtifactNumber { get; set; }
 
-    [Required(AllowEmptyStrings = false, ErrorMessage = "A title must be provided")]
-    public string? Title { get; set; }
+    public string Title { get; set; }
 
     public string? Description { get; set; }
 
-    public string? Type { get; set; }
+    public string Type { get; set; }
 
     public string? StorageLocation { get; set; }
 
@@ -94,4 +92,19 @@ public class ArtifactEntryValidationModel
 
         return entry;
     }
+
+    public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
+    {
+        if (string.IsNullOrWhiteSpace(Title))
+            yield return new ValidationResult("An artifact title must be provided.", [nameof(Title)]);
+
+        if (string.IsNullOrWhiteSpace(ArtifactNumber))
+            yield return new ValidationResult("An artifact numbering must be supplied.", [nameof(ArtifactNumber)]);
+
+        if (string.IsNullOrWhiteSpace(Type))
+            yield return new ValidationResult("An artifact type must be provided.", [nameof(Type)]);
+
+        if (string.IsNullOrEmpty(StorageLocation))
+            yield return new ValidationResult("An artifact storage location must be provided.");
+    }
 }