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C#
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using DressAtelierContracts.BindingModels;
using DressAtelierContracts.BusinessLogicContracts;
using DressAtelierContracts.SearchModels;
using DressAtelierContracts.StorageContracts;
using DressAtelierContracts.ViewModels;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace DressAtelierBusinessLogic.BusinessLogic
{
public class DressLogic : IDressLogic
{
private readonly ILogger _logger;
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private readonly IDressStorage _dressStorage;
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public DressLogic(ILogger<DressLogic> logger, IDressStorage dressStorage)
{
_logger = logger;
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_dressStorage = dressStorage;
}
public bool Create(DressBindingModel model)
{
CheckModel(model);
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if(_dressStorage.Insert(model) == null)
{
_logger.LogWarning("Insert operation failed");
return false;
}
return true;
}
public bool Update(DressBindingModel model)
{
CheckModel(model);
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if (_dressStorage.Update(model) == null)
{
_logger.LogWarning("Update operation failed");
return false;
}
return true;
}
public bool Delete(DressBindingModel model)
{
CheckModel(model, false);
_logger.LogInformation("Delete. ID:{ID}", model.ID);
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if (_dressStorage.Delete(model) == null)
{
_logger.LogWarning("Delete operation failed");
return false;
}
return true;
}
public DressViewModel? ReadElement(DressSearchModel model)
{
if (model == null)
{
throw new ArgumentNullException(nameof(model));
}
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_logger.LogInformation("ReadElement. DressName:{DressName}.ID:{ ID}", model.DressName, model.ID);
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var element = _dressStorage.GetElement(model);
if (element == null)
{
_logger.LogWarning("ReadElement element not found");
return null;
}
_logger.LogInformation("ReadElement find. ID:{ID}", element.ID);
return element;
}
public List<DressViewModel>? ReadList(DressSearchModel? model)
{
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_logger.LogInformation("ReadList. DressName:{DressName}. ID:{ ID}", model?.DressName, model?.ID);
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var list = model == null ? _dressStorage.GetFullList() : _dressStorage.GetFilteredList(model);
if (list == null)
{
_logger.LogWarning("ReadList return null list");
return null;
}
_logger.LogInformation("ReadList. Count:{Count}", list.Count);
return list;
}
private void CheckModel(DressBindingModel model, bool withParams = true)
{
if (model == null)
{
throw new ArgumentNullException(nameof(model));
}
if (!withParams)
{
return;
}
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if (string.IsNullOrEmpty(model.DressName))
{
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throw new ArgumentNullException("Invalid name of dress",nameof(model.DressName));
}
if (model.Price <= 0)
{
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throw new ArgumentNullException("Price of dress should be higher than 0", nameof(model.Price));
}
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_logger.LogInformation("Product. DressName:{DressName}. Cost:{Cost}. ID: {ID}", model.DressName, model.Price, model.ID);
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var element = _dressStorage.GetElement(new DressSearchModel
{
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DressName = model.DressName,
});
if (element != null && element.ID != model.ID)
{
throw new InvalidOperationException("Product with such name already exists");
}
}
}
}