Merge pull request #105 from mohammadKarimi/100-custom-back-half-validation

Add Validation for Back-Half.

Author: mohammadKarimi

src/SwiftLink.Application/UseCases/Links/Commands/GenerateShortCode/GenerateShortCodeValidator.cs

@@ -16,6 +16,8 @@ public GenerateShortCodeValidator(IApplicationDbContext dbContext)
             .Must(BeAValidUrl).WithMessage(LinkMessages.InvalidUrlFormat.Message);
 
         RuleFor(x => x.BackHalf)
+            .MaximumLength(16).WithMessage(LinkMessages.BackHalfLength.Message)
+            .Must(BeAValidCharacters).WithMessage(LinkMessages.BackHalfInvalidFormat.Message)
             .MustAsync(BeAValidBackHalf).WithMessage(LinkMessages.BackHalfIsExist.Message);
 
         RuleFor(x => x.ExpirationDate)
@@ -25,6 +27,9 @@ public GenerateShortCodeValidator(IApplicationDbContext dbContext)
     private bool BeAValidUrl(string url)
        => UrlFormatChecker.UrlRegex().IsMatch(url);
 
+    private bool BeAValidCharacters(string backHalf)
+      => BackHalfFormatChecker.WordRegex().IsMatch(backHalf);
+
     private bool BeAValidExpirationDate(DateTime? date)
         => date is null || date.Value > DateTime.Now;
 

src/SwiftLink.Application/UseCases/Links/LinkMessages.cs

@@ -13,8 +13,10 @@ internal record LinkMessages
     public static readonly Error InvalidLinkId = Error.Validation("LinkValidation", "Invalid LinkId or Subscriber Token.");
     public static readonly Error InvalidSubscriberId = Error.Validation("LinkValidation", "Invalid SubscriberId.");
     public static readonly Error BackHalfIsExist = Error.Failure("LinkValidation", "This back-half text is used before.");
+    public static readonly Error BackHalfLength = Error.Validation("BackHalf Validation", "Back-Half must be less than 16 characters.");
+    public static readonly Error BackHalfInvalidFormat = Error.Validation("BackHalf Validation", "Back-Half must be contain words and numbers.");
+
     public static readonly Error GroupNameMustBeSent = Error.Validation("GroupName Validation", "GroupName field can not be null.");
     public static readonly Error InvalidBackHalfLength = Error.Validation("LinkValidation", "maximum length for back-half text is 30.");
     public static readonly Error InvalidBackHalf = Error.Validation("LinkValidation", "maximum length for back-half text is 30.");
-
 }

src/SwiftLink.Shared/Regx/BackHalfFormatChecker.cs

@@ -0,0 +1,11 @@
+using System.Text.RegularExpressions;
+
+namespace SwiftLink.Shared;
+
+public static partial class BackHalfFormatChecker
+{
+    private const string Pattern = @"^[a-zA-Z0-9]*$";
+
+    [GeneratedRegex(Pattern, RegexOptions.IgnoreCase, "en-US")]
+    public static partial Regex WordRegex();
+}