Created all validators

BookHive/Validators/Books/CreateBookDtoValidator.cs

@@ -14,9 +14,9 @@ public class CreateBookDtoValidator : Validator<CreateBookDto>
             .WithMessage("Le titre ne peut pas dépasser 200 caractères.");
         
         RuleFor(x => x.Isbn)
-            .NotEmpty().WithMessage("L’ISBN est obligatoire.")
-            .Matches(@"^\d{13}$")
-            .WithMessage("L’ISBN doit contenir exactement 13 chiffres.");
+            .NotEmpty()
+            .WithMessage("L’ISBN est obligatoire.")!
+            .IsValidIsbn13();
         
         RuleFor(x => x.PageCount)
             .GreaterThan(0)

BookHive/Validators/Loans/CreateLoanDtoValidator.cs

@@ -26,6 +26,17 @@ public class CreateLoanDtoValidator : Validator<CreateLoanDto>
             .GreaterThan(d => d.LoanDate)
             .WithMessage("Due date must be in the future.")
             .Must((loan, dueDate) => dueDate <= loan.LoanDate.AddDays(30))
-            .WithMessage("Due date must be in the future.");;
+            .WithMessage("Due date must be in the future.");
+        
+        RuleFor(x => x.DueDate)
+            .Must((dto, dueDate) =>
+            {
+                var dayOfWeek = dto.LoanDate.DayOfWeek;
+                var isWeekend = dayOfWeek == DayOfWeek.Saturday
+                                || dayOfWeek == DayOfWeek.Sunday;
+                var maxDays = isWeekend ? 14 : 30;
+                return dueDate <= dto.LoanDate.AddDays(maxDays);
+            })
+            .WithMessage("La durée max est de 14j (week-end) ou 30j (semaine).");
     }
 }

BookHive/Validators/Reviews/CreateReviewDtoValidator.cs

@@ -18,7 +18,7 @@ public class CreateReviewDtoValidator : Validator<CreateReviewDto>
         
         RuleFor(x => x.Rating)
             .InclusiveBetween(1, 5)
-            .WithMessage("Rating must be between 1 and 5.");
+            .WithMessage(x => $"La note {x.Rating} est invalide. Elle doit être comprise entre 1 et 5.");
 
         When(x => x.Comment is not null, () =>
         {

BookHive/Validators/Reviews/UpdateReviewDtoValidator.cs

@@ -22,7 +22,7 @@ public class UpdateReviewDtoValidator : Validator<UpdateReviewDto>
         
         RuleFor(x => x.Rating)
             .InclusiveBetween(1, 5)
-            .WithMessage("Rating must be between 1 and 5.");
+            .WithMessage(x => $"La note {x.Rating} est invalide. Elle doit être comprise entre 1 et 5.");
 
         When(x => x.Comment is not null, () =>
         {