104 lines
2.9 KiB
C#
104 lines
2.9 KiB
C#
using ForumContracts.BindingModels;
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using ForumContracts.BusinessLogicContracts;
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using ForumContracts.SearchModels;
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using ForumContracts.StoragesContracts;
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using ForumContracts.ViewModels;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace ForumBusinessLogic
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{
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public class CategoryLogic : ICategoryLogic
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{
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private readonly ICategoryStorage _categoryStorage;
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public CategoryLogic(ICategoryStorage categoryStorage)
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{
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_categoryStorage = categoryStorage;
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}
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public bool Create(CategoryBindingModel model)
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{
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CheckModel(model);
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if (_categoryStorage.Insert(model) == null)
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{
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return false;
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}
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return true;
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}
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public bool Delete(CategoryBindingModel model)
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{
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CheckModel(model, false);
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if (_categoryStorage.Delete(model) == null)
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{
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return false;
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}
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return true;
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}
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public CategoryViewModel? ReadElement(CategorySearchModel model)
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{
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if (model == null)
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{
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throw new ArgumentNullException(nameof(model));
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}
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var element = _categoryStorage.GetElement(model);
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if (element == null)
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{
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return null;
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}
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return element;
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}
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public List<CategoryViewModel>? ReadList(CategorySearchModel? model)
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{
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var list = model == null ? _categoryStorage.GetFullList() : _categoryStorage.GetFilteredList(model);
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if (list == null)
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{
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return null;
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}
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return list;
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}
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public bool Update(CategoryBindingModel model)
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{
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CheckModel(model);
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if (_categoryStorage.Update(model) == null)
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{
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return false;
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}
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return true;
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}
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private void CheckModel(CategoryBindingModel model, bool withParams = true)
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{
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if (model == null)
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{
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throw new ArgumentNullException(nameof(model));
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}
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if (!withParams)
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{
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return;
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}
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if (string.IsNullOrEmpty(model.Name))
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{
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throw new ArgumentNullException("Нет названия категории", nameof(model.Name));
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}
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var element = _categoryStorage.GetElement(new CategorySearchModel
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{
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Name = model.Name
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}
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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 InvalidOperationException("Категория с таким названием уже есть");
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}
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}
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}
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}
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