62 lines
1.8 KiB
C#
62 lines
1.8 KiB
C#
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using LibraryContracts.BindingModels;
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using LibraryContracts.BusinessLogicsContracts;
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using LibraryContracts.StorageContracts;
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using LibraryContracts.ViewModels;
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namespace LibraryBusinessLogic.BusinessLogics
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{
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public class GenreLogic : IGenreLogic
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{
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private readonly IGenreStorage _genreStorage;
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public GenreLogic(IGenreStorage genreStorage)
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{
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_genreStorage = genreStorage;
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}
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public List<GenreViewModel> Read(GenreBindingModel model)
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{
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if (model == null)
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{
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return _genreStorage.GetFullList();
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}
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if (model.Id.HasValue)
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{
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return new List<GenreViewModel> { _genreStorage.GetElement(model) };
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}
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return _genreStorage.GetFilteredList(model);
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}
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public void CreateOrUpdate(GenreBindingModel model)
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{
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var element = _genreStorage.GetElement(
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new GenreBindingModel
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{
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Name = model.Name
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});
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if (element != null && element.Id != model.Id)
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{
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throw new Exception("Такой жанр уже существует");
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}
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if (model.Id.HasValue)
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{
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_genreStorage.Update(model);
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}
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else
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{
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_genreStorage.Insert(model);
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}
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}
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public void Delete(GenreBindingModel model)
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{
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var element = _genreStorage.GetElement(new GenreBindingModel { Id = model.Id });
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if (element == null)
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{
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throw new Exception("Жанр не найден");
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}
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_genreStorage.Delete(model);
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}
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}
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}
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