104 lines
2.8 KiB
C#
104 lines
2.8 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 TopicLogic : ITopicLogic
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{
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private readonly ITopicStorage _topicStorage;
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public TopicLogic(ITopicStorage topicStorage)
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{
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_topicStorage = topicStorage;
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}
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public bool Create(TopicBindingModel model)
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{
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CheckModel(model);
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if (_topicStorage.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(TopicBindingModel model)
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{
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CheckModel(model, false);
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if (_topicStorage.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 TopicViewModel? ReadElement(TopicSearchModel 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 = _topicStorage.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<TopicViewModel>? ReadList(TopicSearchModel? model)
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{
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var list = model == null ? _topicStorage.GetFullList() : _topicStorage.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(TopicBindingModel model)
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{
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CheckModel(model);
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if (_topicStorage.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(TopicBindingModel 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 темы", nameof(model.Name));
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}
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var element = _topicStorage.GetElement(new TopicSearchModel
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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("Тема 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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