Refactoring, database structure changed

WatchIt.DTO/Models/Generics/Rating/RatingMappers.cs

@@ -0,0 +1,51 @@
+using WatchIt.Database.Model;
+
+namespace WatchIt.DTO.Models.Generics.Rating;
+
+public static class RatingMappers
+{
+    #region PUBLIC METHODS
+    
+    public static void UpdateWithRequest(this IRatingEntity entity, RatingRequest ratingRequest)
+    {
+        entity.Rating = ratingRequest.Rating;
+    }
+    
+    public static RatingOverallResponse ToOverallResponse(this IEnumerable<IRatingEntity> entities)
+    {
+        IEnumerable<IRatingEntity> ratingEntities = entities.ToList();
+        
+        long sum = ratingEntities.Sum(x => x.Rating);
+        long count = ratingEntities.Count();
+        
+        return new RatingOverallResponse
+        {
+            Rating = count > 0 ? (decimal)sum / count : null,
+            Count = count
+        };
+    }
+
+    public static RatingUserResponse ToUserResponse(this IRatingEntity entity) => new RatingUserResponse
+    {
+        Date = entity.Date,
+        Rating = entity.Rating,
+    };
+
+    public static RatingUserOverallResponse ToUserOverallResponse(this IEnumerable<IRatingEntity> entities)
+    {
+        IEnumerable<IRatingEntity> ratingEntities = entities.ToList();
+        
+        long sum = ratingEntities.Sum(x => x.Rating);
+        long count = ratingEntities.Count();
+        DateTimeOffset? lastDate = count == 0 ? null : ratingEntities.Max(x => x.Date);
+        
+        return new RatingUserOverallResponse
+        {
+            Rating = count > 0 ? (decimal)sum / count : null,
+            Date = lastDate,
+            Count = count
+        };
+    }
+    
+    #endregion
+}