PIbd-23-Volkov-N.A.-Compute.../ComputersShop/ComputersShopFileImplement/Implements/ShopStorage.cs

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3.9 KiB
C#
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using ComputersShopContracts.BindingModels;
using ComputersShopContracts.SearchModels;
using ComputersShopContracts.StoragesContracts;
using ComputersShopContracts.ViewModels;
using ComputersShopDataModels.Models;
using ComputersShopFileImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ComputersShopFileImplement.Implements
{
public class ShopStorage : IShopStorage
{
private readonly DataFileSingleton source;
public ShopStorage()
{
source = DataFileSingleton.GetInstance();
}
public ShopViewModel? Delete(ShopBindingModel model)
{
var shop = source.Shops.FirstOrDefault(x => x.Id == model.Id);
if (shop != null)
{
source.Shops.Remove(shop);
source.SaveShops();
return shop.GetViewModel;
}
return null;
}
public ShopViewModel? GetElement(ShopSearchModel model)
{
if (string.IsNullOrEmpty(model.ShopName) && !model.Id.HasValue)
{
return null;
}
return source.Shops
.FirstOrDefault(x => (!string.IsNullOrEmpty(model.ShopName) && x.ShopName == model.ShopName) || (model.Id.HasValue && x.Id == model.Id))?.GetViewModel;
}
public List<ShopViewModel> GetFilteredList(ShopSearchModel model)
{
if (string.IsNullOrEmpty(model.ShopName))
{
return new();
}
return source.Shops
.Where(x => x.ShopName.Contains(model.ShopName))
.Select(x => x.GetViewModel)
.ToList();
}
public List<ShopViewModel> GetFullList()
{
return source.Shops.Select(x => x.GetViewModel).ToList();
}
public ShopViewModel? Insert(ShopBindingModel model)
{
model.Id = source.Shops.Count > 0 ? source.Shops.Max(x => x.Id) + 1 : 1;
var newShop = Shop.Create(model);
if (newShop == null)
{
return null;
}
source.Shops.Add(newShop);
source.SaveShops();
return newShop.GetViewModel;
}
public bool SellComputers(IComputerModel model, int quantity)
{
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int hasCount = source.Shops
.SelectMany(x => x.Computers)
.Where(pair => pair.Key == model.Id)
.Sum(pair => pair.Value.Item2);
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if (hasCount < quantity)
return false;
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source.Shops.ForEach(x =>
{
if (x.Computers.TryGetValue(model.Id, out var pair))
{
if (quantity >= pair.Item2)
{
quantity -= pair.Item2;
x.Computers[model.Id] = (model, 0);
}
else
{
x.Computers[model.Id] = (model, pair.Item2 - quantity);
quantity = 0;
}
x.Update(new ShopBindingModel
{
Id = x.Id,
ShopAddress = x.ShopAddress,
Capacity = x.Capacity,
DateOpening = x.DateOpening,
ShopName = x.ShopName,
Computers = x.Computers
});
}
});
source.SaveShops();
return true;
}
public ShopViewModel? Update(ShopBindingModel model)
{
var shop = source.Shops.FirstOrDefault(x => x.Id == model.Id);
if (shop == null)
{
return null;
}
shop.Update(model);
source.SaveShops();
return shop.GetViewModel;
}
}
}