Añadido validador de límite para premios

1 files changed, 27 insertions, 0 deletions

diff --git a/Validations/MaximumWinners.cs b/Validations/MaximumWinners.cs
new file mode 100644
index 0000000..06a467a
--- /dev/null
+++ b/Validations/MaximumWinners.cs
@@ -0,0 +1,27 @@
+using System.ComponentModel.DataAnnotations;
+using BackendPIA.Models;
+
+namespace BackendPIA.Validations {
+    public class MaximumWinners : ValidationAttribute {
+        public string GetMaximumWinnersMessage(object? value) {
+          return $"The given raffle has reached the prize limit.";
+        }
+
+        public string GetNullRaffleErrorMessage(object? value) {
+            return $"The raffle with id {value} doesn't exist";
+        }
+
+        protected override ValidationResult? IsValid(object? value, ValidationContext validationContext) {
+            var db_context = (ApplicationDbContext) validationContext.GetService(typeof(ApplicationDbContext));
+            var raffle = db_context.Raffles.Find((long) value);
+
+            if(raffle == null)
+                return new ValidationResult(GetNullRaffleErrorMessage(value));
+
+            if(db_context.Prizes.Where(p => p.RaffleId == (long) value).Count() >= raffle.Winners) 
+                return new ValidationResult(GetMaximumWinnersMessage(value));
+            
+            return ValidationResult.Success;
+        }
+    }
+}
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