11 changed files with 591 additions and 2 deletions
--- a/TravelCompany/TravelCompany.sln
+++ b/TravelCompany/TravelCompany.sln
@ -11,7 +11,9 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "TravelCompanyContracts", "T
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "TravelCompanyBusinessLogic", "TravelCompanyBusinessLogic\TravelCompanyBusinessLogic.csproj", "{A636CF3E-87F6-4C8B-99C6-8EA066516C0A}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "TravelCompanyListImplement", "TravelCompanyListImplement\TravelCompanyListImplement.csproj", "{0FF615FA-A053-4DF6-99E6-CFC50A1D88C9}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "TravelCompanyListImplement", "TravelCompanyListImplement\TravelCompanyListImplement.csproj", "{0FF615FA-A053-4DF6-99E6-CFC50A1D88C9}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "TravelCompanyFileImplement", "TravelCompanyFileImplement\TravelCompanyFileImplement.csproj", "{388A7F25-BA80-436B-85C2-479FFD9CD6F2}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@ -39,6 +41,10 @@ Global
 		{0FF615FA-A053-4DF6-99E6-CFC50A1D88C9}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{0FF615FA-A053-4DF6-99E6-CFC50A1D88C9}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{0FF615FA-A053-4DF6-99E6-CFC50A1D88C9}.Release|Any CPU.Build.0 = Release|Any CPU
+		{388A7F25-BA80-436B-85C2-479FFD9CD6F2}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{388A7F25-BA80-436B-85C2-479FFD9CD6F2}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{388A7F25-BA80-436B-85C2-479FFD9CD6F2}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{388A7F25-BA80-436B-85C2-479FFD9CD6F2}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
--- a/TravelCompany/TravelCompany/Program.cs
+++ b/TravelCompany/TravelCompany/Program.cs
@ -3,7 +3,7 @@ using Microsoft.Extensions.Logging;
 using NLog.Extensions.Logging;
 using TravelCompanyContracts.BusinessLogicsContracts;
 using TravelCompanyContracts.StoragesContracts;
-using TravelCompanyListImplement.Implements;
+using TravelCompanyFileImplement.Implements;
 using TravelCompanyBusinessLogic.BusinessLogic;

 namespace TravelCompany
--- a/TravelCompany/TravelCompany/TravelCompany.csproj
+++ b/TravelCompany/TravelCompany/TravelCompany.csproj
@ -29,6 +29,7 @@
    <ProjectReference Include="..\TravelCompanyBusinessLogic\TravelCompanyBusinessLogic.csproj" />
    <ProjectReference Include="..\TravelCompanyContracts\TravelCompanyContracts.csproj" />
    <ProjectReference Include="..\TravelCompanyDataModels\TravelCompanyDataModels.csproj" />
+    <ProjectReference Include="..\TravelCompanyFileImplement\TravelCompanyFileImplement.csproj" />
    <ProjectReference Include="..\TravelCompanyListImplement\TravelCompanyListImplement.csproj" />
  </ItemGroup>

--- a/TravelCompany/TravelCompanyFileImplement/DataFileSingleton.cs
+++ b/TravelCompany/TravelCompanyFileImplement/DataFileSingleton.cs
@ -0,0 +1,57 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using TravelCompanyFileImplement.Models;
+using System.Xml.Linq;
+using System.ComponentModel;
+
+namespace TravelCompanyFileImplement
+{
+    public class DataFileSingleton
+    {
+        private static DataFileSingleton? instance;
+        private readonly string ConditionFileName = "Condition.xml";
+        private readonly string OrderFileName = "Order.xml";
+        private readonly string ProductFileName = "Product.xml";
+        public List<Condition> Conditions { get; private set; }
+        public List<Order> Orders { get; private set; }
+        public List<Travel> Travels { get; private set; }
+        public static DataFileSingleton GetInstance()
+        {
+            if (instance == null)
+            {
+                instance = new DataFileSingleton();
+            }
+            return instance;
+        }
+        public void SaveConditions() => SaveData(Conditions, ConditionFileName,"Conditions", x => x.GetXElement);
+        public void SaveTravels() => SaveData(Travels, ProductFileName, "Travels", x => x.GetXElement);
+        public void SaveOrders() => SaveData(Orders, OrderFileName, "Orders", x => x.GetXElement);
+        private DataFileSingleton()
+        {
+            Conditions = LoadData(ConditionFileName, "Condition", x => Condition.Create(x)!)!;
+            Travels = LoadData(ProductFileName, "Travel", x => Travel.Create(x)!)!;
+            Orders = LoadData(OrderFileName, "Order", x => Order.Create(x)!)!;
+        }
+        private static List<T>? LoadData<T>(string filename, string xmlNodeName,
+       Func<XElement, T> selectFunction)
+        {
+            if (File.Exists(filename))
+            {
+                return
+               XDocument.Load(filename)?.Root?.Elements(xmlNodeName)?.Select(selectFunction)?.ToList();
+            }
+            return new List<T>();
+        }
+        private static void SaveData<T>(List<T> data, string filename, string xmlNodeName, Func<T, XElement> selectFunction)
+        {
+            if (data != null)
+            {
+                new XDocument(new XElement(xmlNodeName,
+               data.Select(selectFunction).ToArray())).Save(filename);
+            }
+        }
+    }
+}
--- a/TravelCompany/TravelCompanyFileImplement/Implements/ConditionStorage.cs
+++ b/TravelCompany/TravelCompanyFileImplement/Implements/ConditionStorage.cs
@ -0,0 +1,85 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using TravelCompanyContracts.StoragesContracts;
+using TravelCompanyContracts.BindingModels;
+using TravelCompanyContracts.SearchModels;
+using TravelCompanyContracts.ViewModels;
+using TravelCompanyFileImplement.Models;
+
+
+namespace TravelCompanyFileImplement.Implements
+{
+    public class ConditionStorage : IConditionStorage
+    {
+        private readonly DataFileSingleton source;
+        public ConditionStorage()
+        {
+            source = DataFileSingleton.GetInstance();
+        }
+        public List<ConditionViewModel> GetFullList()
+        {
+            return source.Conditions
+            .Select(x => x.GetViewModel)
+           .ToList();
+        }
+        public List<ConditionViewModel> GetFilteredList(ConditionSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.ConditionName))
+            {
+                return new();
+            }
+            return source.Conditions
+            .Where(x => x.ConditionName.Contains(model.ConditionName))
+           .Select(x => x.GetViewModel)
+           .ToList();
+        }
+        public ConditionViewModel? GetElement(ConditionSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.ConditionName) && !model.Id.HasValue)
+            {
+                return null;
+            }
+            return source.Conditions.FirstOrDefault(x =>(!string.IsNullOrEmpty(model.ConditionName) && x.ConditionName ==model.ConditionName) ||
+            (model.Id.HasValue && x.Id == model.Id))
+            ?.GetViewModel;
+        }
+        public ConditionViewModel? Insert(ConditionBindingModel model)
+        {
+            model.Id = source.Conditions.Count > 0 ? source.Conditions.Max(x =>x.Id) + 1 : 1;
+            var newCondition = Condition.Create(model);
+            if (newCondition == null)
+            {
+                return null;
+            }
+            source.Conditions.Add(newCondition);
+            source.SaveConditions();
+            return newCondition.GetViewModel;
+        }
+        public ConditionViewModel? Update(ConditionBindingModel model)
+        {
+            var condition = source.Conditions.FirstOrDefault(x => x.Id ==model.Id);
+            if (condition == null)
+            {
+                return null;
+            }
+            condition.Update(model);
+            source.SaveConditions();
+            return condition.GetViewModel;
+        }
+        public ConditionViewModel? Delete(ConditionBindingModel model)
+        {
+            var element = source.Conditions.FirstOrDefault(x => x.Id ==model.Id);
+            if (element != null)
+            {
+                source.Conditions.Remove(element);
+                source.SaveConditions();
+                return element.GetViewModel;
+            }
+            return null;
+        }
+    }
+}
--- a/TravelCompany/TravelCompanyFileImplement/Implements/OrderStorage.cs
+++ b/TravelCompany/TravelCompanyFileImplement/Implements/OrderStorage.cs
@ -0,0 +1,93 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Reflection;
+using System.Text;
+using System.Threading.Tasks;
+using TravelCompanyContracts.BindingModels;
+using TravelCompanyContracts.SearchModels;
+using TravelCompanyContracts.StoragesContracts;
+using TravelCompanyContracts.ViewModels;
+using TravelCompanyFileImplement.Models;
+
+
+namespace TravelCompanyFileImplement.Implements
+{
+    public class OrderStorage : IOrderStorage
+    {
+        private readonly DataFileSingleton _source;
+        public OrderStorage()
+        {
+            _source = DataFileSingleton.GetInstance();
+        }
+        public List<OrderViewModel> GetFullList()
+        {
+            return _source.Orders
+            .Select(x => InsertTravelName(x.GetViewModel))
+           .ToList();
+        }
+        public List<OrderViewModel> GetFilteredList(OrderSearchModel model)
+        {
+            if (!model.Id.HasValue)
+            {
+                return new();
+            }
+            return _source.Orders
+            .Where(x => x.Id == model.Id)
+            .Select(x => InsertTravelName(x.GetViewModel))
+            .ToList();
+        }
+        public OrderViewModel? GetElement(OrderSearchModel model)
+        {
+            if (!model.Id.HasValue)
+            {
+                return null;
+            }
+            return InsertTravelName(_source.Orders
+            .FirstOrDefault(x => model.Id.HasValue && x.Id == model.Id)
+            ?.GetViewModel);
+        }
+        public OrderViewModel? Insert(OrderBindingModel model)
+        {
+            model.Id = _source.Orders.Count > 0 ? _source.Orders.Max(x => x.Id) + 1 : 1;
+            var newOrder = Order.Create(model);
+            if (newOrder == null)
+            {
+                return null;
+            }
+            _source.Orders.Add(newOrder);
+            _source.SaveOrders();
+            return InsertTravelName(newOrder.GetViewModel);
+        }
+        public OrderViewModel? Update(OrderBindingModel model)
+        {
+            var order = _source.Orders.FirstOrDefault(x => x.Id == model.Id);
+            if (order == null)
+            {
+                return null;
+            }
+            order.Update(model);
+            _source.SaveOrders();
+            return InsertTravelName(order.GetViewModel);
+        }
+        public OrderViewModel? Delete(OrderBindingModel model)
+        {
+            var element = _source.Orders.FirstOrDefault(x => x.Id == model.Id);
+            if (element != null)
+            {
+                _source.Orders.Remove(element);
+                _source.SaveOrders();
+                return InsertTravelName(element.GetViewModel);
+            }
+            return null;
+        }
+
+        public OrderViewModel InsertTravelName(OrderViewModel fullModel)
+        {
+            string? travelName = _source.Travels.FirstOrDefault(x => x.Id == fullModel?.TravelId)?.TravelName;
+            if (travelName != null) fullModel.TravelName = travelName;
+            return fullModel;
+        }
+    }
+}
--- a/TravelCompany/TravelCompanyFileImplement/Implements/TravelStorage.cs
+++ b/TravelCompany/TravelCompanyFileImplement/Implements/TravelStorage.cs
@ -0,0 +1,85 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using TravelCompanyContracts.BindingModels;
+using TravelCompanyContracts.SearchModels;
+using TravelCompanyContracts.StoragesContracts;
+using TravelCompanyContracts.ViewModels;
+using TravelCompanyFileImplement.Models;
+
+namespace TravelCompanyFileImplement.Implements
+{
+    public class TravelStorage : ITravelStorage
+    {
+        private readonly DataFileSingleton _source;
+        public TravelStorage()
+        {
+            _source = DataFileSingleton.GetInstance();
+        }
+        public List<TravelViewModel> GetFullList()
+        {
+            return _source.Travels
+            .Select(x => x.GetViewModel)
+            .ToList();
+        }
+        public List<TravelViewModel> GetFilteredList(TravelSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.TravelName))
+            {
+                return new();
+            }
+            return _source.Travels
+            .Where(x => x.TravelName.Contains(model.TravelName))
+            .Select(x => x.GetViewModel)
+            .ToList();
+        }
+        public TravelViewModel? GetElement(TravelSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.TravelName) && !model.Id.HasValue)
+            {
+                return null;
+            }
+            return _source.Travels
+            .FirstOrDefault(x => (x.TravelName == model.TravelName && !string.IsNullOrEmpty(model.TravelName) ) ||
+            (model.Id.HasValue && x.Id == model.Id))
+            ?.GetViewModel;
+
+        }
+        public TravelViewModel? Insert(TravelBindingModel model)
+        {
+            model.Id = _source.Travels.Count > 0 ? _source.Travels.Max(x => x.Id) + 1 : 1;
+            var newTravel = Travel.Create(model);
+            if (newTravel == null)
+            {
+                return null;
+            }
+            _source.Travels.Add(newTravel);
+            _source.SaveTravels();
+            return newTravel.GetViewModel;
+        }
+        public TravelViewModel? Update(TravelBindingModel model)
+        {
+            var travel = _source.Travels.FirstOrDefault(x => x.Id == model.Id);
+            if (travel == null)
+            {
+                return null;
+            }
+            travel.Update(model);
+            _source.SaveTravels();
+            return travel.GetViewModel;
+        }
+        public TravelViewModel? Delete(TravelBindingModel model)
+        {
+            var element = _source.Travels.FirstOrDefault(x => x.Id == model.Id);
+            if (element != null)
+            {
+                _source.Travels.Remove(element);
+                _source.SaveTravels();
+                return element.GetViewModel;
+            }
+            return null;
+        }
+    }
+}
--- a/TravelCompany/TravelCompanyFileImplement/Models/Condition.cs
+++ b/TravelCompany/TravelCompanyFileImplement/Models/Condition.cs
@ -0,0 +1,66 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using TravelCompanyDataModels.Models;
+using TravelCompanyContracts.BindingModels;
+using TravelCompanyContracts.ViewModels;
+using System.Xml.Linq;
+
+
+namespace TravelCompanyFileImplement.Models
+{
+    public class Condition : IConditionModel
+    {
+        public int Id { get; private set; }
+        public string ConditionName { get; private set; } = string.Empty;
+        public double Cost { get; set; }
+        public static Condition? Create(ConditionBindingModel model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new Condition()
+            {
+                Id = model.Id,
+                ConditionName = model.ConditionName,
+                Cost = model.Cost
+            };
+        }
+        public static Condition? Create(XElement element)
+        {
+            if (element == null)
+            {
+                return null;
+            }
+            return new Condition()
+            {
+                Id = Convert.ToInt32(element.Attribute("Id")!.Value),
+                ConditionName = element.Element("ConditionName")!.Value,
+                Cost = Convert.ToDouble(element.Element("Cost")!.Value)
+            };
+        }
+        public void Update(ConditionBindingModel model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            ConditionName = model.ConditionName;
+            Cost = model.Cost;
+        }
+        public ConditionViewModel GetViewModel => new()
+        {
+            Id = Id,
+            ConditionName = ConditionName,
+            Cost = Cost
+        };
+        public XElement GetXElement => new("Condition",
+        new XAttribute("Id", Id),
+        new XElement("ConditionName", ConditionName),
+        new XElement("Cost", Cost.ToString()));
+    }
+}
+
--- a/TravelCompany/TravelCompanyFileImplement/Models/Order.cs
+++ b/TravelCompany/TravelCompanyFileImplement/Models/Order.cs
@ -0,0 +1,87 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using System.Text;
+using System.Threading.Tasks;
+using System.Xml.Linq;
+using TravelCompanyContracts.BindingModels;
+using TravelCompanyContracts.ViewModels;
+using TravelCompanyDataModels.Enums;
+using TravelCompanyDataModels.Models;
+
+namespace TravelCompanyFileImplement.Models
+{
+    public class Order : IOrderModel
+    {
+        public int Id { get; private set; }
+        public int TravelId { get; set; }
+        public int Count { get; set; }
+        public double Sum { get; set; }
+        public OrderStatus Status { get; set; }
+        public DateTime DateCreate { get; set; }
+        public DateTime? DateImplement { get; set; }
+        public static Order? Create(OrderBindingModel model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new Order()
+            {
+                Id = model.Id,
+                TravelId = model.TravelId,
+                Count = model.Count,
+                Sum = model.Sum,
+                Status = model.Status,
+                DateCreate = model.DateCreate,
+                DateImplement = model.DateImplement,
+            };
+        }
+        public static Order? Create(XElement element)
+        {
+            if (element == null)
+            {
+                return null;
+            }
+            return new Order()
+            {
+                Id = Convert.ToInt32(element.Attribute("Id")!.Value),
+                TravelId = Convert.ToInt32(element.Element("TravelId")!.Value),
+                Count = Convert.ToInt32(element.Element("Count")!.Value),
+                Sum = Convert.ToDouble(element.Element("Sum")!.Value),
+                Status = (OrderStatus) Convert.ToInt32(element.Element("Status")!.Value),
+                DateCreate = Convert.ToDateTime(element.Element("DateCreate")!.Value),
+                DateImplement = string.IsNullOrEmpty(element.Element("DateImplement")!.Value) ? null : Convert.ToDateTime(element.Element("DateImplement")!.Value)
+            };
+        }
+        public void Update(OrderBindingModel model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            Status = model.Status;
+            if (model.DateImplement.HasValue) { DateImplement = model.DateImplement; }
+        }
+        public OrderViewModel GetViewModel => new()
+        {
+            Id = Id,
+            TravelId = TravelId,
+            Count = Count,
+            Sum = Sum,
+            Status = Status,
+            DateCreate = DateCreate,
+            DateImplement = DateImplement,
+        };
+        public XElement GetXElement => new("Order",
+        new XAttribute("Id", Id),
+        new XElement("TravelId", TravelId),
+        new XElement("Count", Count.ToString()),
+        new XElement("Sum", Sum.ToString()),
+        new XElement("Status", ((int)Status).ToString()),
+        new XElement("DateCreate", DateCreate.ToString()),
+        new XElement("DateImplement", DateImplement.ToString()));
+    }
+}
+
--- a/TravelCompany/TravelCompanyFileImplement/Models/Travel.cs
+++ b/TravelCompany/TravelCompanyFileImplement/Models/Travel.cs
@ -0,0 +1,93 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using TravelCompanyDataModels.Models;
+using TravelCompanyContracts.ViewModels;
+using TravelCompanyContracts.BindingModels;
+using System.Xml.Linq;
+
+
+namespace TravelCompanyFileImplement.Models
+{
+    public class Travel : ITravelModel
+    {
+        public int Id { get; private set; }
+        public string TravelName { get; private set; } = string.Empty;
+        public double Price { get; private set; }
+        public Dictionary<int, int> Conditions { get; private set; } = new();
+        private Dictionary<int, (IConditionModel, int)>? _travelConditions = null;
+        public Dictionary<int, (IConditionModel, int)> TravelConditions
+        {
+            get
+            {
+                if (_travelConditions == null)
+                {
+                    var source = DataFileSingleton.GetInstance();
+                    _travelConditions = Conditions.ToDictionary(x => x.Key, y => ((source.Conditions.FirstOrDefault(z => z.Id == y.Key) as IConditionModel)!,y.Value));
+                }
+                return _travelConditions;
+            }
+        }
+        public static Travel? Create(TravelBindingModel model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new Travel()
+            {
+                Id = model.Id,
+                TravelName = model.TravelName,
+                Price = model.Price,
+                Conditions = model.TravelConditions.ToDictionary(x => x.Key, x=> x.Value.Item2)
+            };
+        }
+        public static Travel? Create(XElement element)
+        {
+            if (element == null)
+            {
+                return null;
+            }
+            return new Travel()
+            {
+                Id = Convert.ToInt32(element.Attribute("Id")!.Value),
+                TravelName = element.Element("TravelName")!.Value,
+                Price = Convert.ToDouble(element.Element("Price")!.Value),
+                Conditions = element.Element("TravelConditions")!.Elements("TravelCondition").ToDictionary(x =>Convert.ToInt32(x.Element("Key")?.Value), x =>Convert.ToInt32(x.Element("Value")?.Value))
+            };
+        }
+        public void Update(TravelBindingModel model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            TravelName = model.TravelName;
+            Price = model.Price;
+            Conditions = model.TravelConditions.ToDictionary(x => x.Key, x =>x.Value.Item2);
+            _travelConditions = null;
+        }
+        public TravelViewModel GetViewModel => new()
+        {
+            Id = Id,
+            TravelName = TravelName,
+            Price = Price,
+            TravelConditions = TravelConditions
+        };
+        public XElement GetXElement => new("Travel",
+        new XAttribute("Id", Id),
+        new XElement("TravelName", TravelName),
+        new XElement("Price", Price.ToString()),
+        new XElement("TravelConditions", Conditions.Select(x =>
+       new XElement("TravelCondition",
+
+       new XElement("Key", x.Key),
+
+       new XElement("Value", x.Value)))
+
+       .ToArray()));
+    }
+
+}
--- a/TravelCompany/TravelCompanyFileImplement/TravelCompanyFileImplement.csproj
+++ b/TravelCompany/TravelCompanyFileImplement/TravelCompanyFileImplement.csproj
@ -0,0 +1,16 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\TravelCompanyBusinessLogic\TravelCompanyBusinessLogic.csproj" />
+    <ProjectReference Include="..\TravelCompanyContracts\TravelCompanyContracts.csproj" />
+    <ProjectReference Include="..\TravelCompanyDataModels\TravelCompanyDataModels.csproj" />
+    <ProjectReference Include="..\TravelCompanyListImplement\TravelCompanyListImplement.csproj" />
+  </ItemGroup>
+
+</Project>