public bool CheckPromotionUnique(PromotionDataModel promotionDataModel)
{
var result = _dbContext.Promotions.AsNoTracking().FirstOrDefault(c => c.PromotionId != promotionDataModel.PromotionId &&
c.UrlName == promotionDataModel.UrlName) == null;
return(result);
}
public PromotionDataModel CreatePromotion(PromotionDataModel promotionDataModel)
{
var result = _dbContext.Promotions.Add(promotionDataModel).Entity;
_dbContext.SaveChanges();
return(result);
}
private void DeleteImages(PromotionDataModel promotionDataModel, ICollection <PromotionImage> promotionImages)
{
var promotionImageForDeleteCollection = promotionDataModel.PromotionImages.Where(db => promotionImages.All(i => i.ImageId != db.ImageId)).ToList();
foreach (var countryImageForDelete in promotionImageForDeleteCollection)
{
promotionDataModel.PromotionImages.Remove(countryImageForDelete);
}
}
private void AddImages(PromotionDataModel promotionDataModel, ICollection <PromotionImage> promotionImages)
{
var newImageCollection = promotionImages
.Where(i => promotionDataModel.PromotionImages
.All(db => db.ImageId != i.ImageId))
.ToList();
foreach (var newImage in newImageCollection)
{
promotionDataModel.PromotionImages.Add(newImage);
}
}
public void DeletePromotion(PromotionDataModel promotionDataModel)
{
var promotion = _dbContext.Promotions
.Include(p => p.PromotionImages)
.FirstOrDefault(p => p.PromotionId == promotionDataModel.PromotionId);
if (promotion != null)
{
RemovePromotionImages(promotion);
_dbContext.Promotions.Remove(promotion);
_dbContext.SaveChanges();
}
}
public void UpdatePromotion(PromotionDataModel promotionDataModel)
{
var promotionImages = promotionDataModel.PromotionImages;
promotionDataModel.PromotionImages = new HashSet <PromotionImage>();
var entry = _dbContext.Entry(promotionDataModel);
entry.State = EntityState.Modified;
entry.Collection(c => c.PromotionImages).Load();
UpdateImages(promotionDataModel, promotionImages);
_dbContext.SaveChanges();
}
private void RemovePromotionImages(PromotionDataModel promotionDataModel)
{
var promotionImageCollection = promotionDataModel.PromotionImages?.ToList();
if (promotionImageCollection != null && promotionImageCollection.Any())
{
foreach (var promotionImage in promotionImageCollection)
{
var image = promotionImage.Image;
if (image != null)
{
_dbContext.Images.Remove(image);
}
}
}
}
private void UpdateImages(PromotionDataModel promotionDataModel, ICollection <PromotionImage> promotionImages)
{
AddImages(promotionDataModel, promotionImages);
DeleteImages(promotionDataModel, promotionImages);
}