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MagicCarpetProject/MagicCarpetBusinessLogic/Implementations/AgencyBusinessLogicContract.cs

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+using MagicCarpetContracts.BusinessLogicContracts;
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Enums;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.Extensions;
+using MagicCarpetContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Text.Json;
+using System.Threading.Tasks;
+
+namespace MagicCarpetBusinessLogic.Implementations;
+
+public class AgencyBusinessLogicContract(IAgencyStorageContract agencyStorageContract, ILogger logger) : IAgencyBusinessLogicContract
+{
+    private readonly IAgencyStorageContract _agencyStorageContract = agencyStorageContract;
+    private readonly ILogger _logger = logger;
+    public List<AgencyDataModel> GetAllComponents()
+    {
+        _logger.LogInformation("GetAllComponents");
+        return _agencyStorageContract.GetList() ?? throw new NullListException();
+
+        return [];
+    }
+
+    public AgencyDataModel GetComponentByData(string data)
+    {
+        _logger.LogInformation("Get element by data: {data}", data);
+        if (data.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+        if (!data.IsGuid())
+        {
+            throw new ElementNotFoundException(data);
+        }
+        return _agencyStorageContract.GetElementById(data) ?? throw new ElementNotFoundException(data);
+
+        return new("", TourType.None, 0, []);
+    }
+
+    public void InsertComponent(AgencyDataModel agencyDataModel)
+    {
+        _logger.LogInformation("New data: {json}", JsonSerializer.Serialize(agencyDataModel));
+        ArgumentNullException.ThrowIfNull(agencyDataModel);
+        agencyDataModel.Validate();
+        _agencyStorageContract.AddElement(agencyDataModel);
+    }
+
+    public void UpdateComponent(AgencyDataModel agencyDataModel)
+    {
+        _logger.LogInformation("Update data: {json}", JsonSerializer.Serialize(agencyDataModel));
+        ArgumentNullException.ThrowIfNull(agencyDataModel);
+        agencyDataModel.Validate();
+        _agencyStorageContract.UpdElement(agencyDataModel);
+    }
+
+    public void DeleteComponent(string id)
+    {
+        logger.LogInformation("Delete by id: {id}", id);
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("Id is not a unique identifier");
+        }
+        _agencyStorageContract.DelElement(id);
+    }
+}

MagicCarpetProject/MagicCarpetBusinessLogic/Implementations/ClientBusinessLogicContract.cs

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+using MagicCarpetContracts.BuisnessLogicContracts;
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.Extensions;
+using MagicCarpetContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Text.Json;
+using System.Text.RegularExpressions;
+using System.Threading.Tasks;
+
+namespace MagicCarpetBusinessLogic.Implementations;
+
+public class ClientBusinessLogicContract(IClientStorageContract clientStorageContract, ILogger logger)  : IClientBusinessLogicContract
+{
+    private readonly ILogger _logger = logger;
+    private readonly IClientStorageContract _clientStorageContract = clientStorageContract;
+
+    public List<ClientDataModel> GetAllClients()
+    {
+        _logger.LogInformation("GetAllClients");
+        return _clientStorageContract.GetList() ?? throw new NullListException();
+    }
+
+    public ClientDataModel GetClientByData(string data)
+    {
+        _logger.LogInformation("Get element by data: {data}", data);
+        if (data.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+        if (data.IsGuid())
+        {
+            return _clientStorageContract.GetElementById(data) ?? throw new ElementNotFoundException(data);
+        }
+        if (Regex.IsMatch(data, @"^((8|\+7)[\- ]?)?(\(?\d{3}\)?[\- ]?)?[\d\- ]{7,10}$"))
+        {
+            return _clientStorageContract.GetElementByPhoneNumber(data) ?? throw new ElementNotFoundException(data);
+        }
+        return _clientStorageContract.GetElementByFIO(data) ?? throw new ElementNotFoundException(data);
+    }
+
+    public void InsertClient(ClientDataModel clientDataModel)
+    {
+        _logger.LogInformation("New data: {json}", JsonSerializer.Serialize(clientDataModel));
+        ArgumentNullException.ThrowIfNull(clientDataModel);
+        clientDataModel.Validate();
+        _clientStorageContract.AddElement(clientDataModel);
+    }
+
+    public void UpdateClient(ClientDataModel clientDataModel)
+    {
+        _logger.LogInformation("Update data: {json}", JsonSerializer.Serialize(clientDataModel));
+        ArgumentNullException.ThrowIfNull(clientDataModel);
+        clientDataModel.Validate();
+        _clientStorageContract.UpdElement(clientDataModel);
+    }
+
+    public void DeleteClient(string id)
+    {
+        _logger.LogInformation("Delete by id: {id}", id);
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("Id is not a unique identifier");
+        }
+        _clientStorageContract.DelElement(id);
+    }
+}

MagicCarpetProject/MagicCarpetBusinessLogic/Implementations/EmployeeBusinessLogicContract.cs

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+using MagicCarpetContracts.BuisnessLogicContracts;
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.Extensions;
+using MagicCarpetContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Text.Json;
+using System.Text.RegularExpressions;
+using System.Threading.Tasks;
+
+namespace MagicCarpetBusinessLogic.Implementations;
+
+public class EmployeeBusinessLogicContract(IEmployeeStorageContract employeeStorageContract, ILogger logger) : IEmployeeBusinessLogicContract
+{
+    private readonly ILogger _logger = logger;
+    private readonly IEmployeeStorageContract _employeeStorageContract = employeeStorageContract;
+
+    public List<EmployeeDataModel> GetAllEmployees(bool onlyActive = true)
+    {
+        _logger.LogInformation("GetAllEmployees params: {onlyActive}", onlyActive);
+        return _employeeStorageContract.GetList(onlyActive) ?? throw new NullListException();
+    }
+
+    public List<EmployeeDataModel> GetAllEmployeesByPost(string postId, bool onlyActive = true)
+    {
+        _logger.LogInformation("GetAllEmployees params: {postId}, {onlyActive},", postId, onlyActive);
+        if (postId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(postId));
+        }
+        if (!postId.IsGuid())
+        {
+            throw new ValidationException("The value in the field postId is not a unique identifier.");
+        }
+        return _employeeStorageContract.GetList(onlyActive, postId) ?? throw new NullListException();
+    }
+
+    public List<EmployeeDataModel> GetAllEmployeesByBirthDate(DateTime fromDate, DateTime toDate, bool onlyActive = true)
+    {
+        _logger.LogInformation("GetAllEmployees params: {onlyActive}, {fromDate}, {toDate}", onlyActive, fromDate, toDate);
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        return _employeeStorageContract.GetList(onlyActive, fromBirthDate: fromDate, toBirthDate: toDate) ?? throw new NullListException();
+    }
+
+    public List<EmployeeDataModel> GetAllEmployeesByEmploymentDate(DateTime fromDate, DateTime toDate, bool onlyActive = true)
+    {
+        _logger.LogInformation("GetAllEmployees params: {onlyActive}, {fromDate}, {toDate}", onlyActive, fromDate, toDate);
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        return _employeeStorageContract.GetList(onlyActive, fromEmploymentDate: fromDate, toEmploymentDate: toDate) ?? throw new NullListException();
+    }
+
+    public EmployeeDataModel GetEmployeeByData(string data)
+    {
+        _logger.LogInformation("Get element by data: {data}", data);
+        if (data.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+        if (data.IsGuid())
+        {
+            return _employeeStorageContract.GetElementById(data) ?? throw new ElementNotFoundException(data);
+        }
+        if (Regex.IsMatch(data, @"^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$"))
+        {
+            return _employeeStorageContract.GetElementByEmail(data) ?? throw new ElementNotFoundException(data);
+        }
+        return _employeeStorageContract.GetElementByFIO(data) ?? throw new ElementNotFoundException(data);
+    }
+
+    public void InsertEmployee(EmployeeDataModel employeeDataModel)
+    {
+        _logger.LogInformation("New data: {json}", JsonSerializer.Serialize(employeeDataModel));
+        ArgumentNullException.ThrowIfNull(employeeDataModel);
+        employeeDataModel.Validate();
+        _employeeStorageContract.AddElement(employeeDataModel);
+    }
+
+    public void UpdateEmployee(EmployeeDataModel employeeDataModel)
+    {
+        _logger.LogInformation("Update data: {json}", JsonSerializer.Serialize(employeeDataModel));
+        ArgumentNullException.ThrowIfNull(employeeDataModel);
+        employeeDataModel.Validate();
+        _employeeStorageContract.UpdElement(employeeDataModel);
+    }
+
+    public void DeleteEmployee(string id)
+    {
+        _logger.LogInformation("Delete by id: {id}", id);
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("Id is not a unique identifier");
+        }
+        _employeeStorageContract.DelElement(id);
+    }
+}

MagicCarpetProject/MagicCarpetBusinessLogic/Implementations/PostBusinessLogicContract.cs

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+using MagicCarpetContracts.BuisnessLogicContracts;
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.Extensions;
+using MagicCarpetContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Text.Json;
+using System.Threading.Tasks;
+namespace MagicCarpetBusinessLogic.Implementations;
+
+public class PostBusinessLogicContract(IPostStorageContract postStorageContract, ILogger logger) : IPostBusinessLogicContract
+{
+    private readonly ILogger _logger = logger;
+    private readonly IPostStorageContract _postStorageContract = postStorageContract;
+    public List<PostDataModel> GetAllPosts()
+    {
+        _logger.LogInformation("GetAllPosts");
+        return _postStorageContract.GetList() ?? throw new NullListException();
+    }
+
+    public List<PostDataModel> GetAllDataOfPost(string postId)
+    {
+        _logger.LogInformation("GetAllDataOfPost for {postId}", postId);
+        if (postId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(postId));
+        }
+        if (!postId.IsGuid())
+        {
+            throw new ValidationException("The value in the field postId is not a unique identifier.");
+        }
+        return _postStorageContract.GetPostWithHistory(postId) ?? throw new NullListException();
+    }
+
+    public PostDataModel GetPostByData(string data)
+    {
+        _logger.LogInformation("Get element by data: {data}", data);
+        if (data.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+        if (data.IsGuid())
+        {
+            return _postStorageContract.GetElementById(data) ?? throw new ElementNotFoundException(data);
+        }
+        return _postStorageContract.GetElementByName(data) ?? throw new ElementNotFoundException(data);
+    }
+
+    public void InsertPost(PostDataModel postDataModel)
+    {
+        _logger.LogInformation("New data: {json}", JsonSerializer.Serialize(postDataModel));
+        ArgumentNullException.ThrowIfNull(postDataModel);
+        postDataModel.Validate();
+        _postStorageContract.AddElement(postDataModel);
+    }
+
+    public void UpdatePost(PostDataModel postDataModel)
+    {
+        _logger.LogInformation("Update data: {json}", JsonSerializer.Serialize(postDataModel));
+        ArgumentNullException.ThrowIfNull(postDataModel);
+        postDataModel.Validate();
+        _postStorageContract.UpdElement(postDataModel);
+    }
+
+    public void DeletePost(string id)
+    {
+        _logger.LogInformation("Delete by id: {id}", id);
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("Id is not a unique identifier");
+        }
+        _postStorageContract.DelElement(id);
+    }
+
+    public void RestorePost(string id)
+    {
+        _logger.LogInformation("Restore by id: {id}", id);
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("Id is not a unique identifier");
+        }
+        _postStorageContract.ResElement(id);
+    }
+}

MagicCarpetProject/MagicCarpetBusinessLogic/Implementations/SalaryBusinessLogicContract.cs

@@ -0,0 +1,124 @@
+using MagicCarpetContracts.BuisnessLogicContracts;
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.Extensions;
+using MagicCarpetContracts.Infrastructure;
+using MagicCarpetContracts.Infrastructure.PostConfigurations;
+using MagicCarpetContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetBusinessLogic.Implementations;
+public class SalaryBusinessLogicContract(ISalaryStorageContract salaryStorageContract,ISaleStorageContract saleStorageContract,
+    IPostStorageContract postStorageContract, IEmployeeStorageContract employeeStorageContract, ILogger logger, IConfigurationSalary сonfiguration) : ISalaryBusinessLogicContract
+{
+    private readonly ILogger _logger = logger;
+    private readonly ISalaryStorageContract _salaryStorageContract = salaryStorageContract;
+    private readonly ISaleStorageContract _saleStorageContract = saleStorageContract;
+    private readonly IPostStorageContract _postStorageContract = postStorageContract;
+    private readonly IEmployeeStorageContract _employeeStorageContract = employeeStorageContract;
+    private readonly IConfigurationSalary _salaryConfiguration = сonfiguration;
+    private readonly Lock _lockObject = new();
+    public List<SalaryDataModel> GetAllSalariesByPeriod(DateTime fromDate, DateTime toDate)
+    {
+        _logger.LogInformation("GetAllSalaries params: {fromDate}, {toDate}", fromDate, toDate);
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        return _salaryStorageContract.GetList(fromDate, toDate) ?? throw new NullListException();
+    }
+
+    public List<SalaryDataModel> GetAllSalariesByPeriodByEmployee(DateTime fromDate, DateTime toDate, string employeeId)
+    {
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        if (employeeId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(employeeId));
+        }
+        if (!employeeId.IsGuid())
+        {
+            throw new ValidationException("The value in the field employeeId is not a unique identifier.");
+        }
+        _logger.LogInformation("GetAllSalaries params: {fromDate}, {toDate}, {employeeId}", fromDate, toDate, employeeId);
+        return _salaryStorageContract.GetList(fromDate, toDate, employeeId) ?? throw new NullListException();
+    }
+
+    public void CalculateSalaryByMounth(DateTime date)
+    {
+        _logger.LogInformation("CalculateSalaryByMounth: {date}", date);
+        var startDate = new DateTime(date.Year, date.Month, 1);
+        var finishDate = new DateTime(date.Year, date.Month, DateTime.DaysInMonth(date.Year, date.Month));
+        var employees = _employeeStorageContract.GetList() ?? throw new NullListException();
+        foreach (var employee in employees)
+        {
+            var sales = _saleStorageContract.GetList(startDate, finishDate, employeeId: employee.Id) ?? throw new NullListException();
+            var post = _postStorageContract.GetElementById(employee.PostId) ?? throw new NullListException();
+            var salary = post.ConfigurationModel switch
+            {
+                null => 0,
+                TravelAgentPostConfiguration cpc => CalculateSalaryForTravelAgent(sales, startDate, finishDate, cpc),
+                ChiefPostConfiguration spc => CalculateSalaryForChief(startDate, finishDate, spc),
+                PostConfiguration pc => pc.Rate,
+            };
+            _logger.LogDebug("The employee {employeeId} was paid a salary of {salary}", employee.Id, salary);
+            _salaryStorageContract.AddElement(new SalaryDataModel(employee.Id, finishDate, salary));
+        }
+    }
+    private double CalculateSalaryForTravelAgent(List<SaleDataModel> sales, DateTime startDate, DateTime finishDate, TravelAgentPostConfiguration config)
+    {
+        var calcPercent = 0.0;
+        var dates = new List<DateTime>();
+        for (var date = startDate; date < finishDate; date = date.AddDays(1))
+        {
+            dates.Add(date);
+        }
+
+        var parallelOptions = new ParallelOptions
+        {
+            MaxDegreeOfParallelism = _salaryConfiguration.MaxConcurrentThreads
+        };
+
+        Parallel.ForEach(dates, parallelOptions, date =>
+        {
+            var salesInDay = sales.Where(x => x.SaleDate.Date == date.Date).ToArray();
+            if (salesInDay.Length > 0)
+            {
+                lock (_lockObject)
+                {
+                    calcPercent += (salesInDay.Sum(x => x.Sum) / salesInDay.Length) * config.SalePercent;
+                }
+            }
+        });
+
+        double calcBonusTask = 0;
+        try
+        {
+            calcBonusTask = sales.Where(x => x.Sum > _salaryConfiguration.ExtraSaleSum).Sum(x => x.Sum) * config.BonusForExtraSales;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Error in bonus calculation");
+        }
+        return config.Rate + calcPercent + calcBonusTask;
+    }
+    private double CalculateSalaryForChief(DateTime startDate, DateTime finishDate, ChiefPostConfiguration config)
+    {
+        try
+        {
+            return config.Rate + config.PersonalCountTrendPremium * _employeeStorageContract.GetEmployeeTrend(startDate, finishDate);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Error in the chief payroll process");
+            return 0;
+        }
+    }
+}

MagicCarpetProject/MagicCarpetBusinessLogic/Implementations/SaleBusinessLogicContract.cs

@@ -0,0 +1,156 @@
+using MagicCarpetContracts.BuisnessLogicContracts;
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.Extensions;
+using MagicCarpetContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Text.Json;
+using System.Threading.Tasks;
+
+namespace MagicCarpetBusinessLogic.Implementations;
+
+public class SaleBusinessLogicContract(ISaleStorageContract saleStorageContract,IAgencyStorageContract agencyStorageContract, ILogger logger) : ISaleBusinessLogicContract
+{
+    private readonly ILogger _logger = logger;
+    private readonly ISaleStorageContract _saleStorageContract = saleStorageContract;
+    private readonly IAgencyStorageContract _agencyStorageContract = agencyStorageContract;
+
+    public List<SaleDataModel> GetAllSalesByPeriod(DateTime fromDate, DateTime toDate)
+    {
+        _logger.LogInformation("GetAllSales params: {fromDate}, {toDate}", fromDate, toDate);
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        return _saleStorageContract.GetList(fromDate, toDate) ?? throw new NullListException();
+    }
+
+    public List<SaleDataModel> GetAllSalesByEmployeeByPeriod(string employeeId, DateTime fromDate, DateTime toDate)
+    {
+        _logger.LogInformation("GetAllSales params: {employeeId}, {fromDate}, {toDate}", employeeId, fromDate, toDate);
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        if (employeeId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(employeeId));
+        }
+        if (!employeeId.IsGuid())
+        {
+            throw new ValidationException("The value in the field employeeId is not a unique identifier.");
+        }
+        return _saleStorageContract.GetList(fromDate, toDate, employeeId: employeeId) ?? throw new NullListException();
+    }
+
+    public List<SaleDataModel> GetAllSalesByClientByPeriod(string clientId, DateTime fromDate, DateTime toDate)
+    {
+        _logger.LogInformation("GetAllSales params: {buyerId}, {fromDate}, {toDate}", clientId, fromDate, toDate);
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        if (clientId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(clientId));
+        }
+        if (!clientId.IsGuid())
+        {
+            throw new ValidationException("The value in the field clientId is not a unique identifier.");
+        }
+        return _saleStorageContract.GetList(fromDate, toDate, clientId: clientId) ?? throw new NullListException();
+    }
+
+    public List<SaleDataModel> GetAllSalesByTourByPeriod(string tourId, DateTime fromDate, DateTime toDate)
+    {
+        _logger.LogInformation("GetAllSales params: {tourId}, {fromDate}, {toDate}", tourId, fromDate, toDate);
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        if (tourId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(tourId));
+        }
+        if (!tourId.IsGuid())
+        {
+            throw new ValidationException("The value in the field tourId is not a unique identifier.");
+        }
+        return _saleStorageContract.GetList(fromDate, toDate, tourId: tourId) ?? throw new NullListException();
+    }
+
+    public SaleDataModel GetSaleByData(string data)
+    {
+        _logger.LogInformation("Get element by data: {data}", data);
+        if (data.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+        if (!data.IsGuid())
+        {
+            throw new ValidationException("Id is not a unique identifier");
+        }
+        return _saleStorageContract.GetElementById(data) ?? throw new ElementNotFoundException(data);
+    }
+
+    public void InsertSale(SaleDataModel saleDataModel)
+    {
+        _logger.LogInformation("New data: {json}", JsonSerializer.Serialize(saleDataModel));
+        ArgumentNullException.ThrowIfNull(saleDataModel);
+        saleDataModel.Validate();
+        if (!_agencyStorageContract.CheckComponents(saleDataModel))
+        {
+            throw new InsufficientException("Dont have tour in agency");
+        }
+        _saleStorageContract.AddElement(saleDataModel);
+    }
+
+    public void CancelSale(string id)
+    {
+        _logger.LogInformation("Cancel by id: {id}", id);
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("Id is not a unique identifier");
+        }
+        _saleStorageContract.DelElement(id);
+    }
+    //третье требование
+    public double CalculateSaleRevenue(DateTime fromDate, DateTime toDate)
+    {
+        _logger.LogInformation("CalculateSaleRevenue params: {fromDate}, {toDate}", fromDate, toDate);
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        var sales = GetAllSalesByPeriod(fromDate, toDate);
+        if (sales == null || !sales.Any())
+        {
+            return 0;
+        }
+
+        double totalRevenue = 0;
+        object lockObj = new object();
+
+        Parallel.ForEach(sales, sale =>
+        {
+            if (sale.IsCancel)
+                return;
+
+            lock (lockObj)
+            {
+                totalRevenue += sale.Sum;
+            }
+        });
+
+        _logger.LogInformation("Total revenue calculated: {totalRevenue}", totalRevenue);
+        return totalRevenue;
+    }
+}

MagicCarpetProject/MagicCarpetBusinessLogic/Implementations/SuppliesBusinessLogicContract.cs

@@ -0,0 +1,77 @@
+using MagicCarpetContracts.BusinessLogicContracts;
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Enums;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.Extensions;
+using MagicCarpetContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Text.Json;
+using System.Threading.Tasks;
+
+namespace MagicCarpetBusinessLogic.Implementations;
+
+public class SuppliesBusinessLogicContract(ISuppliesStorageContract suppliesStorageContract, ILogger logger) : ISuppliesBusinessLogicContract
+{
+    private readonly ISuppliesStorageContract _suppliesStorageContract = suppliesStorageContract;
+    private readonly ILogger _logger = logger;
+
+    public List<SuppliesDataModel> GetAllComponents()
+    {
+        _logger.LogInformation("GetAllComponents");
+        return _suppliesStorageContract.GetList() ?? throw new NullListException();
+    }
+
+    public SuppliesDataModel GetComponentByData(string data)
+    {
+        _logger.LogInformation("Get element by data: {data}", data);
+        if (data.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+        if (!data.IsGuid())
+        {
+            throw new ElementNotFoundException(data);
+        }
+        return _suppliesStorageContract.GetElementById(data) ?? throw new ElementNotFoundException(data);
+    }
+
+    public void InsertComponent(SuppliesDataModel suppliesDataModel)
+    {
+        _logger.LogInformation("New data: {json}", JsonSerializer.Serialize(suppliesDataModel));
+        ArgumentNullException.ThrowIfNull(suppliesDataModel);
+        suppliesDataModel.Validate();
+        _suppliesStorageContract.AddElement(suppliesDataModel);
+    }
+
+    public void UpdateComponent(SuppliesDataModel suppliesDataModel)
+    {
+        _logger.LogInformation("Update data: {json}", JsonSerializer.Serialize(suppliesDataModel));
+        ArgumentNullException.ThrowIfNull(suppliesDataModel);
+        suppliesDataModel.Validate();
+        _suppliesStorageContract.UpdElement(suppliesDataModel);
+    }
+    //первое требование
+    public int CalculateTourSupplies(DateTime? startDate, DateTime? endDate)
+    {
+        var supplies = _suppliesStorageContract.GetList(startDate, endDate);
+        if (supplies == null || supplies.Count == 0)
+        {
+            return 0;
+        }
+        int count = 0;
+        var lockObject = new object();
+        Parallel.ForEach(supplies, supply =>
+        {
+            int supplyCount = supply.Tours.Sum(component => component.Count);
+            lock (lockObject)
+            {
+                count += supplyCount;
+            }
+        });
+        return count;
+    }
+}

MagicCarpetProject/MagicCarpetBusinessLogic/Implementations/TourBusinessLogicContract.cs

@@ -0,0 +1,81 @@
+using MagicCarpetContracts.BuisnessLogicContracts;
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.Extensions;
+using MagicCarpetContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Text.Json;
+using System.Threading.Tasks;
+
+namespace MagicCarpetBusinessLogic.Implementations;
+
+public class TourBusinessLogicContract(ITourStorageContract tourStorageContract, ILogger logger) : ITourBusinessLogicContract
+{
+    private readonly ILogger _logger = logger;
+    private readonly ITourStorageContract _tourStorageContract = tourStorageContract;
+    public List<TourDataModel> GetAllTours()
+    {
+        _logger.LogInformation("GetAllTours");
+        return _tourStorageContract.GetList() ?? throw new NullListException();
+    }
+
+    public List<TourHistoryDataModel> GetTourHistoryByTour(string tourId)
+    {
+        _logger.LogInformation("GetTourHistoryByTour for {tourId}", tourId);
+        if (tourId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(tourId));
+        }
+        if (!tourId.IsGuid())
+        {
+            throw new ValidationException("The value in the field tourId is not a unique identifier.");
+        }
+        return _tourStorageContract.GetHistoryByTourId(tourId) ?? throw new NullListException();
+    }
+
+    public TourDataModel GetTourByData(string data)
+    {
+        _logger.LogInformation("Get element by data: {data}", data);
+        if (data.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+        if (data.IsGuid())
+        {
+            return _tourStorageContract.GetElementById(data) ?? throw new ElementNotFoundException(data);
+        }
+        return _tourStorageContract.GetElementByName(data) ?? throw new ElementNotFoundException(data);
+    }
+
+    public void InsertTour(TourDataModel tourDataModel)
+    {
+        _logger.LogInformation("New data: {json}", JsonSerializer.Serialize(tourDataModel));
+        ArgumentNullException.ThrowIfNull(tourDataModel);
+        tourDataModel.Validate();
+    }
+
+    public void UpdateTour(TourDataModel tourDataModel)
+    {
+        _logger.LogInformation("Update data: {json}", JsonSerializer.Serialize(tourDataModel));
+        ArgumentNullException.ThrowIfNull(tourDataModel);
+        tourDataModel.Validate();
+    }
+
+    public void DeleteTour(string id)
+    {
+        _logger.LogInformation("Delete by id: {id}", id);
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("Id is not a unique identifier");
+        }
+        _tourStorageContract.DelElement(id);
+    }
+}

MagicCarpetProject/MagicCarpetBusinessLogic/MagicCarpetBusinessLogic.csproj

@@ -0,0 +1,21 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+	<ItemGroup>
+		<InternalsVisibleTo Include="MagicCarpetTests" />
+		<InternalsVisibleTo Include="MagicCarpetWebApi" />
+		<InternalsVisibleTo Include="DynamicProxyGenAssembly2" />
+	</ItemGroup>
+	<ItemGroup>
+		<PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="9.0.2" />
+	</ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\MagicCarpetContracts\MagicCarpetContracts.csproj" />
+  </ItemGroup>
+
+</Project>

MagicCarpetProject/MagicCarpetContracts/AdapterContracts/IAgencyAdapter.cs

@@ -0,0 +1,18 @@
+using MagicCarpetContracts.AdapterContracts.OperationResponses;
+using MagicCarpetContracts.BindingModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.AdapterContracts;
+
+public interface IAgencyAdapter
+{
+    AgencyOperationResponse GetAllComponents();
+    AgencyOperationResponse GetComponentByData(string data);
+    AgencyOperationResponse InsertComponent(AgencyBindingModel warehouseDataModel);
+    AgencyOperationResponse UpdateComponent(AgencyBindingModel warehouseDataModel);
+    AgencyOperationResponse DeleteComponent(string id);
+}

MagicCarpetProject/MagicCarpetContracts/AdapterContracts/IClientAdapter.cs

@@ -0,0 +1,22 @@
+using MagicCarpetContracts.AdapterContracts.OperationResponses;
+using MagicCarpetContracts.BindingModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.AdapterContracts;
+
+public interface IClientAdapter
+{
+    ClientOperationResponse GetList();
+
+    ClientOperationResponse GetElement(string data);
+
+    ClientOperationResponse RegisterClient(ClientBindingModel clientModel);
+
+    ClientOperationResponse ChangeClientInfo(ClientBindingModel clientModel);
+
+    ClientOperationResponse RemoveClient(string id);
+}

MagicCarpetProject/MagicCarpetContracts/AdapterContracts/IEmployeeAdapter.cs

@@ -0,0 +1,28 @@
+using MagicCarpetContracts.AdapterContracts.OperationResponses;
+using MagicCarpetContracts.BindingModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.AdapterContracts;
+
+public interface IEmployeeAdapter
+{
+    EmployeeOperationResponse GetList(bool includeDeleted);
+
+    EmployeeOperationResponse GetPostList(string id, bool includeDeleted);
+
+    EmployeeOperationResponse GetListByBirthDate(DateTime fromDate, DateTime toDate, bool includeDeleted);
+
+    EmployeeOperationResponse GetListByEmploymentDate(DateTime fromDate, DateTime toDate, bool includeDeleted);
+
+    EmployeeOperationResponse GetElement(string data);
+
+    EmployeeOperationResponse RegisterEmployee(EmployeeBindingModel employeeModel);
+
+    EmployeeOperationResponse ChangeEmployeeInfo(EmployeeBindingModel employeeModel);
+
+    EmployeeOperationResponse RemoveEmployee(string id);
+}

MagicCarpetProject/MagicCarpetContracts/AdapterContracts/IPostAdapter.cs

@@ -0,0 +1,26 @@
+using MagicCarpetContracts.AdapterContracts.OperationResponses;
+using MagicCarpetContracts.BindingModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.AdapterContracts;
+
+public interface IPostAdapter
+{
+    PostOperationResponse GetList();
+
+    PostOperationResponse GetHistory(string id);
+
+    PostOperationResponse GetElement(string data);
+
+    PostOperationResponse RegisterPost(PostBindingModel postModel);
+
+    PostOperationResponse ChangePostInfo(PostBindingModel postModel);
+
+    PostOperationResponse RemovePost(string id);
+
+    PostOperationResponse RestorePost(string id);
+}

MagicCarpetProject/MagicCarpetContracts/AdapterContracts/ISalaryAdapter.cs

@@ -0,0 +1,15 @@
+using MagicCarpetContracts.AdapterContracts.OperationResponses;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.AdapterContracts;
+
+public interface ISalaryAdapter
+{
+    SalaryOperationResponse GetListByPeriod(DateTime fromDate, DateTime toDate);
+    SalaryOperationResponse GetListByPeriodByEmployee(DateTime fromDate, DateTime toDate, string employeeId);
+    SalaryOperationResponse CalculateSalary(DateTime date);
+}

MagicCarpetProject/MagicCarpetContracts/AdapterContracts/ISaleAdapter.cs

@@ -0,0 +1,26 @@
+using MagicCarpetContracts.AdapterContracts.OperationResponses;
+using MagicCarpetContracts.BindingModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.AdapterContracts;
+
+public interface ISaleAdapter
+{
+    SaleOperationResponse GetList(DateTime fromDate, DateTime toDate);
+
+    SaleOperationResponse GetEmployeeList(string id, DateTime fromDate, DateTime toDate);
+
+    SaleOperationResponse GetClientList(string id, DateTime fromDate, DateTime toDate);
+
+    SaleOperationResponse GetTourList(string id, DateTime fromDate, DateTime toDate);
+
+    SaleOperationResponse GetElement(string id);
+
+    SaleOperationResponse MakeSale(SaleBindingModel saleModel);
+
+    SaleOperationResponse CancelSale(string id);
+}

MagicCarpetProject/MagicCarpetContracts/AdapterContracts/ISuppliesAdapter.cs

@@ -0,0 +1,17 @@
+using MagicCarpetContracts.AdapterContracts.OperationResponses;
+using MagicCarpetContracts.BindingModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.AdapterContracts;
+
+public interface ISuppliesAdapter
+{
+    SuppliesOperationResponse GetAllComponents();
+    SuppliesOperationResponse GetComponentByData(string data);
+    SuppliesOperationResponse InsertComponent(SuppliesBindingModel componentDataModel);
+    SuppliesOperationResponse UpdateComponent(SuppliesBindingModel componentDataModel);
+}

MagicCarpetProject/MagicCarpetContracts/AdapterContracts/ITourAdapter.cs

@@ -0,0 +1,24 @@
+using MagicCarpetContracts.AdapterContracts.OperationResponses;
+using MagicCarpetContracts.BindingModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.AdapterContracts;
+
+public interface ITourAdapter
+{
+    TourOperationResponse GetList(bool includeDeleted);
+
+    TourOperationResponse GetHistory(string id);
+
+    TourOperationResponse GetElement(string data);
+
+    TourOperationResponse RegisterTour(TourBindingModel tourModel);
+
+    TourOperationResponse ChangeTourInfo(TourBindingModel tourModel);
+
+    TourOperationResponse RemoveTour(string id);
+}

MagicCarpetProject/MagicCarpetContracts/AdapterContracts/OperationResponses/AgencyOperationResponse .cs

@@ -0,0 +1,26 @@
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Infrastructure;
+using MagicCarpetContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.AdapterContracts.OperationResponses;
+
+public class AgencyOperationResponse : OperationResponse
+{
+    public static AgencyOperationResponse OK(List<AgencyViewModel> data) => OK<AgencyOperationResponse, List<AgencyViewModel>>(data);
+
+    public static AgencyOperationResponse OK(AgencyViewModel data) => OK<AgencyOperationResponse, AgencyViewModel>(data);
+
+    public static AgencyOperationResponse NoContent() => NoContent<AgencyOperationResponse>();
+
+    public static AgencyOperationResponse NotFound(string message) => NotFound<AgencyOperationResponse>(message);
+
+    public static AgencyOperationResponse BadRequest(string message) => BadRequest<AgencyOperationResponse>(message);
+
+    public static AgencyOperationResponse InternalServerError(string message) => InternalServerError<AgencyOperationResponse>(message);
+}
+

MagicCarpetProject/MagicCarpetContracts/AdapterContracts/OperationResponses/ClientOperationResponse.cs

@@ -0,0 +1,24 @@
+using MagicCarpetContracts.Infrastructure;
+using MagicCarpetContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.AdapterContracts.OperationResponses;
+
+public class ClientOperationResponse : OperationResponse
+{
+    public static ClientOperationResponse OK(List<ClientViewModel> data) => OK<ClientOperationResponse, List<ClientViewModel>>(data);
+
+    public static ClientOperationResponse OK(ClientViewModel data) => OK<ClientOperationResponse, ClientViewModel>(data);
+
+    public static ClientOperationResponse NoContent() => NoContent<ClientOperationResponse>();
+
+    public static ClientOperationResponse BadRequest(string message) => BadRequest<ClientOperationResponse>(message);
+
+    public static ClientOperationResponse NotFound(string message) => NotFound<ClientOperationResponse>(message);
+
+    public static ClientOperationResponse InternalServerError(string message) => InternalServerError<ClientOperationResponse>(message);
+}

MagicCarpetProject/MagicCarpetContracts/AdapterContracts/OperationResponses/EmployeeOperationResponse.cs

@@ -0,0 +1,24 @@
+using MagicCarpetContracts.Infrastructure;
+using MagicCarpetContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.AdapterContracts.OperationResponses;
+
+public class EmployeeOperationResponse : OperationResponse
+{
+    public static EmployeeOperationResponse OK(List<EmployeeViewModel> data) => OK<EmployeeOperationResponse, List<EmployeeViewModel>>(data);
+
+    public static EmployeeOperationResponse OK(EmployeeViewModel data) => OK<EmployeeOperationResponse, EmployeeViewModel>(data);
+
+    public static EmployeeOperationResponse NoContent() => NoContent<EmployeeOperationResponse>();
+
+    public static EmployeeOperationResponse NotFound(string message) => NotFound<EmployeeOperationResponse>(message);
+
+    public static EmployeeOperationResponse BadRequest(string message) => BadRequest<EmployeeOperationResponse>(message);
+
+    public static EmployeeOperationResponse InternalServerError(string message) => InternalServerError<EmployeeOperationResponse>(message);
+}

MagicCarpetProject/MagicCarpetContracts/AdapterContracts/OperationResponses/PostOperationResponse.cs

@@ -0,0 +1,24 @@
+using MagicCarpetContracts.Infrastructure;
+using MagicCarpetContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.AdapterContracts.OperationResponses;
+
+public class PostOperationResponse : OperationResponse
+{
+    public static PostOperationResponse OK(List<PostViewModel> data) => OK<PostOperationResponse, List<PostViewModel>>(data);
+
+    public static PostOperationResponse OK(PostViewModel data) => OK<PostOperationResponse, PostViewModel>(data);
+
+    public static PostOperationResponse NoContent() => NoContent<PostOperationResponse>();
+
+    public static PostOperationResponse NotFound(string message) => NotFound<PostOperationResponse>(message);
+
+    public static PostOperationResponse BadRequest(string message) => BadRequest<PostOperationResponse>(message);
+
+    public static PostOperationResponse InternalServerError(string message) => InternalServerError<PostOperationResponse>(message);
+}

MagicCarpetProject/MagicCarpetContracts/AdapterContracts/OperationResponses/SalaryOperationResponse.cs

@@ -0,0 +1,18 @@
+using MagicCarpetContracts.Infrastructure;
+using MagicCarpetContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.AdapterContracts.OperationResponses;
+
+public class SalaryOperationResponse : OperationResponse
+{
+    public static SalaryOperationResponse OK(List<SalaryViewModel> data) => OK<SalaryOperationResponse, List<SalaryViewModel>>(data);
+    public static SalaryOperationResponse NoContent() => NoContent<SalaryOperationResponse>();
+    public static SalaryOperationResponse NotFound(string message) => NotFound<SalaryOperationResponse>(message);
+    public static SalaryOperationResponse BadRequest(string message) => BadRequest<SalaryOperationResponse>(message);
+    public static SalaryOperationResponse InternalServerError(string message) => InternalServerError<SalaryOperationResponse>(message);
+}

MagicCarpetProject/MagicCarpetContracts/AdapterContracts/OperationResponses/SaleOperationResponse.cs

@@ -0,0 +1,24 @@
+using MagicCarpetContracts.Infrastructure;
+using MagicCarpetContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.AdapterContracts.OperationResponses;
+
+public class SaleOperationResponse : OperationResponse
+{
+    public static SaleOperationResponse OK(List<SaleViewModel> data) => OK<SaleOperationResponse, List<SaleViewModel>>(data);
+
+    public static SaleOperationResponse OK(SaleViewModel data) => OK<SaleOperationResponse, SaleViewModel>(data);
+
+    public static SaleOperationResponse NoContent() => NoContent<SaleOperationResponse>();
+
+    public static SaleOperationResponse NotFound(string message) => NotFound<SaleOperationResponse>(message);
+
+    public static SaleOperationResponse BadRequest(string message) => BadRequest<SaleOperationResponse>(message);
+
+    public static SaleOperationResponse InternalServerError(string message) => InternalServerError<SaleOperationResponse>(message);
+}

MagicCarpetProject/MagicCarpetContracts/AdapterContracts/OperationResponses/SuppliesOperationResponse .cs

@@ -0,0 +1,24 @@
+using MagicCarpetContracts.Infrastructure;
+using MagicCarpetContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.AdapterContracts.OperationResponses;
+
+public class SuppliesOperationResponse : OperationResponse
+{
+    public static SuppliesOperationResponse OK(List<SuppliesViewModel> data) => OK<SuppliesOperationResponse, List<SuppliesViewModel>>(data);
+
+    public static SuppliesOperationResponse OK(SuppliesViewModel data) => OK<SuppliesOperationResponse, SuppliesViewModel>(data);
+
+    public static SuppliesOperationResponse NoContent() => NoContent<SuppliesOperationResponse>();
+
+    public static SuppliesOperationResponse NotFound(string message) => NotFound<SuppliesOperationResponse>(message);
+
+    public static SuppliesOperationResponse BadRequest(string message) => BadRequest<SuppliesOperationResponse>(message);
+
+    public static SuppliesOperationResponse InternalServerError(string message) => InternalServerError<SuppliesOperationResponse>(message);
+}

MagicCarpetProject/MagicCarpetContracts/AdapterContracts/OperationResponses/TourOperationResponse.cs

@@ -0,0 +1,26 @@
+using MagicCarpetContracts.Infrastructure;
+using MagicCarpetContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.AdapterContracts.OperationResponses;
+
+public class TourOperationResponse : OperationResponse
+{
+    public static TourOperationResponse OK(List<TourViewModel> data) => OK<TourOperationResponse, List<TourViewModel>>(data);
+
+    public static TourOperationResponse OK(List<TourHistoryViewModel> data) => OK<TourOperationResponse, List<TourHistoryViewModel>>(data);
+
+    public static TourOperationResponse OK(TourViewModel data) => OK<TourOperationResponse, TourViewModel>(data);
+
+    public static TourOperationResponse NoContent() => NoContent<TourOperationResponse>();
+
+    public static TourOperationResponse NotFound(string message) => NotFound<TourOperationResponse>(message);
+
+    public static TourOperationResponse BadRequest(string message) => BadRequest<TourOperationResponse>(message);
+
+    public static TourOperationResponse InternalServerError(string message) => InternalServerError<TourOperationResponse>(message);
+}

MagicCarpetProject/MagicCarpetContracts/BindingModels/AgencyBindingModel.cs

@@ -0,0 +1,16 @@
+using MagicCarpetContracts.Enums;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.BindingModels;
+
+public class AgencyBindingModel
+{
+    public string? Id { get; set; }
+    public TourType? TourType { get; set; }
+    public int Count { get; set; }
+    public List<TourAgencyBindingModel>? Tours { get; set; }
+}

MagicCarpetProject/MagicCarpetContracts/BindingModels/ClientBindingModel.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.BindingModels;
+
+public class ClientBindingModel
+{
+    public string? Id { get; set; }
+
+    public string? FIO { get; set; }
+
+    public string? PhoneNumber { get; set; }
+
+    public double DiscountSize { get; set; }
+}

MagicCarpetProject/MagicCarpetContracts/BindingModels/EmployeeBindingModel.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.BindingModels;
+
+public class EmployeeBindingModel
+{
+    public string? Id { get; set; }
+
+    public string? FIO { get; set; }
+
+    public string? Email { get; set; }
+
+    public string? PostId { get; set; }
+
+    public DateTime BirthDate { get; set; }
+
+    public DateTime EmploymentDate { get; set; }
+}

MagicCarpetProject/MagicCarpetContracts/BindingModels/PostBindingModel.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.BindingModels;
+
+public class PostBindingModel
+{
+    public string? Id { get; set; }
+
+    public string? PostId => Id;
+
+    public string? PostName { get; set; }
+
+    public string? PostType { get; set; }
+
+    public string? ConfigurationJson { get; set; }
+}

MagicCarpetProject/MagicCarpetContracts/BindingModels/SaleBindingModel.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.BindingModels;
+
+public class SaleBindingModel
+{
+    public string? Id { get; set; }
+
+    public string? EmployeeId { get; set; }
+
+    public string? ClientId { get; set; }
+
+    public int DiscountType { get; set; }
+
+    public List<SaleTourBindingModel>? Tours { get; set; }
+}

MagicCarpetProject/MagicCarpetContracts/BindingModels/SaleTourBindingModel.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.BindingModels;
+
+public class SaleTourBindingModel
+{
+    public string? SaleId { get; set; }
+
+    public string? TourId { get; set; }
+
+    public int Count { get; set; }
+
+    public double Price { get; set; }
+}

MagicCarpetProject/MagicCarpetContracts/BindingModels/SuppliesBindingModel.cs

@@ -0,0 +1,17 @@
+using MagicCarpetContracts.Enums;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.BindingModels;
+
+public class SuppliesBindingModel
+{
+    public string? Id { get; set; }
+    public TourType? TourType { get; set; }
+    public DateTime ProductuionDate { get; set; }
+    public int Count { get; set; }
+    public List<TourSuppliesBindingModel>? Tours { get; set; }
+}

MagicCarpetProject/MagicCarpetContracts/BindingModels/TourAgencyBindingModel.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.BindingModels;
+
+public class TourAgencyBindingModel
+{
+    public string? AgencyId { get; set; }
+    public string? TourId { get; set; }
+    public int Count { get; set; }
+}

MagicCarpetProject/MagicCarpetContracts/BindingModels/TourBindingModel.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.BindingModels;
+
+public class TourBindingModel
+{
+    public string? Id { get; set; }
+    public string? TourName { get; set; }
+    public string? TourCountry { get; set; }
+    public double Price { get; set; }
+    public string? TourType { get; set; }
+}

MagicCarpetProject/MagicCarpetContracts/BindingModels/TourSuppliesBindingModel.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.BindingModels;
+
+public class TourSuppliesBindingModel
+{
+    public string? SuppliesId { get; set; }
+    public string? TourId { get; set; }
+    public int Count { get; set; }
+}

MagicCarpetProject/MagicCarpetContracts/BusinessLogicContracts/IAgencyBusinessLogicContract.cs

@@ -0,0 +1,17 @@
+using MagicCarpetContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.BusinessLogicContracts;
+
+public interface IAgencyBusinessLogicContract
+{
+    List<AgencyDataModel> GetAllComponents();
+    AgencyDataModel GetComponentByData(string data);
+    void InsertComponent(AgencyDataModel agencyDataModel);
+    void UpdateComponent(AgencyDataModel agencyDataModel);
+    void DeleteComponent(string id);
+}

MagicCarpetProject/MagicCarpetContracts/BusinessLogicContracts/IClientBusinessLogicContract.cs

@@ -0,0 +1,21 @@
+using MagicCarpetContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.BuisnessLogicContracts;
+
+public interface IClientBusinessLogicContract
+{
+    List<ClientDataModel> GetAllClients();
+
+    ClientDataModel GetClientByData(string data);
+
+    void InsertClient(ClientDataModel clientDataModel);
+
+    void UpdateClient(ClientDataModel clientDataModel);
+
+    void DeleteClient(string id);
+}

MagicCarpetProject/MagicCarpetContracts/BusinessLogicContracts/IEmployeeBusinessLogicContract.cs

@@ -0,0 +1,27 @@
+using MagicCarpetContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.BuisnessLogicContracts;
+
+public interface IEmployeeBusinessLogicContract
+{
+    List<EmployeeDataModel> GetAllEmployees(bool onlyActive = true);
+
+    List<EmployeeDataModel> GetAllEmployeesByPost(string employeeId, bool onlyActive = true);
+
+    List<EmployeeDataModel> GetAllEmployeesByBirthDate(DateTime fromDate, DateTime toDate, bool onlyActive = true);
+
+    List<EmployeeDataModel> GetAllEmployeesByEmploymentDate(DateTime fromDate, DateTime toDate, bool onlyActive = true);
+
+    EmployeeDataModel GetEmployeeByData(string data);
+
+    void InsertEmployee(EmployeeDataModel employeeDataModel);
+
+    void UpdateEmployee(EmployeeDataModel employeeDataModel);
+
+    void DeleteEmployee(string id);
+}

MagicCarpetProject/MagicCarpetContracts/BusinessLogicContracts/IPostBusinessLogicContract.cs

@@ -0,0 +1,25 @@
+using MagicCarpetContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.BuisnessLogicContracts;
+
+public interface IPostBusinessLogicContract
+{
+    List<PostDataModel> GetAllPosts();
+
+    List<PostDataModel> GetAllDataOfPost(string postId);
+
+    PostDataModel GetPostByData(string data);
+
+    void InsertPost(PostDataModel postDataModel);
+
+    void UpdatePost(PostDataModel postDataModel);
+
+    void DeletePost(string id);
+
+    void RestorePost(string id);
+}

MagicCarpetProject/MagicCarpetContracts/BusinessLogicContracts/ISalaryBusinessLogicContract.cs

@@ -0,0 +1,17 @@
+using MagicCarpetContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.BuisnessLogicContracts;
+
+public interface ISalaryBusinessLogicContract
+{
+    List<SalaryDataModel> GetAllSalariesByPeriod(DateTime fromDate, DateTime toDate);
+
+    List<SalaryDataModel> GetAllSalariesByPeriodByEmployee(DateTime fromDate, DateTime toDate, string employeeId);
+
+    void CalculateSalaryByMounth(DateTime date);
+}

MagicCarpetProject/MagicCarpetContracts/BusinessLogicContracts/ISaleBusinessLogicContract.cs

@@ -0,0 +1,27 @@
+using MagicCarpetContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.BuisnessLogicContracts;
+
+public interface ISaleBusinessLogicContract
+{
+    List<SaleDataModel> GetAllSalesByPeriod(DateTime fromDate, DateTime toDate);
+
+    List<SaleDataModel> GetAllSalesByEmployeeByPeriod(string employeeId, DateTime fromDate, DateTime toDate);
+
+    List<SaleDataModel> GetAllSalesByClientByPeriod(string clientId, DateTime fromDate, DateTime toDate);
+
+    List<SaleDataModel> GetAllSalesByTourByPeriod(string tourId, DateTime fromDate, DateTime toDate);
+
+    SaleDataModel GetSaleByData(string data);
+
+    void InsertSale(SaleDataModel saleDataModel);
+
+    void CancelSale(string id);
+
+    public double CalculateSaleRevenue(DateTime fromDate, DateTime toDate);
+}

MagicCarpetProject/MagicCarpetContracts/BusinessLogicContracts/ISuppliesBusinessLogicContract.cs

@@ -0,0 +1,17 @@
+using MagicCarpetContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.BusinessLogicContracts;
+
+public interface ISuppliesBusinessLogicContract
+{
+    List<SuppliesDataModel> GetAllComponents();
+    SuppliesDataModel GetComponentByData(string data);
+    void InsertComponent(SuppliesDataModel componentDataModel);
+    void UpdateComponent(SuppliesDataModel componentDataModel);
+    int CalculateTourSupplies(DateTime? startDate, DateTime? endDate);
+}

MagicCarpetProject/MagicCarpetContracts/BusinessLogicContracts/ITourBusinessLogicContract.cs

@@ -0,0 +1,23 @@
+using MagicCarpetContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.BuisnessLogicContracts;
+
+public interface ITourBusinessLogicContract
+{
+    List<TourDataModel> GetAllTours();
+
+    List<TourHistoryDataModel> GetTourHistoryByTour(string productId);
+
+    TourDataModel GetTourByData(string data);
+
+    void InsertTour(TourDataModel tourDataModel);
+
+    void UpdateTour(TourDataModel tourDataModel);
+
+    void DeleteTour(string id);
+}

MagicCarpetProject/MagicCarpetContracts/DataModels/AgencyDataModel.cs

@@ -0,0 +1,33 @@
+using MagicCarpetContracts.Enums;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.Extensions;
+using MagicCarpetContracts.Infrastructure;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.DataModels;
+
+public class AgencyDataModel(string id, TourType tourType, int count, List<TourAgencyDataModel> tours) : IValidation
+{
+    public string Id { get; private set; } = id;
+    public TourType TourType { get; private set; } = tourType;
+    public int Count { get; private set; } = count;
+    public List<TourAgencyDataModel> Tours { get; private set; } = tours;
+
+    public void Validate()
+    {
+        if (Id.IsEmpty())
+            throw new ValidationException("Field Id is empty");
+        if (!Id.IsGuid())
+            throw new ValidationException("The value in the field Id is not a unique identifier");
+        if (TourType == TourType.None)
+            throw new ValidationException("Field Type is empty");
+        if (Count <= 0)
+            throw new ValidationException("Field Count is less than or equal to 0");
+        if ((Tours?.Count ?? 0) == 0)
+            throw new ValidationException("The sale must include tours");
+    }
+}

MagicCarpetProject/MagicCarpetContracts/DataModels/EmployeeDataModel.cs

@@ -1,6 +1,7 @@
 using MagicCarpetContracts.Exceptions;
 using MagicCarpetContracts.Extensions;
 using MagicCarpetContracts.Infrastructure;
+using Microsoft.Extensions.Hosting;
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -12,6 +13,8 @@ namespace MagicCarpetContracts.DataModels;
 
 public class EmployeeDataModel(string id, string fio, string email, string postId, DateTime birthDate, DateTime employmentDate, bool isDeleted) : IValidation
 {
+    private readonly PostDataModel? _post;
+
     public string Id { get; private set; } = id;
 
     public string FIO { get; private set; } = fio;
@@ -26,6 +29,17 @@ public class EmployeeDataModel(string id, string fio, string email, string postI
 
     public bool IsDeleted { get; private set; } = isDeleted;
 
+    public string PostName => _post?.PostName ?? string.Empty;
+
+    public EmployeeDataModel(string id, string fio, string email, string postId, DateTime birthDate, DateTime employmentDate, 
+        bool isDeleted, PostDataModel post) : this(id, fio, email, postId, birthDate, employmentDate, isDeleted)
+    {
+        _post = post;
+    }
+
+    public EmployeeDataModel(string id, string fio, string email, string postId, DateTime birthDate, 
+        DateTime employmentDate) : this(id, fio, email, postId, birthDate, employmentDate, false) { }
+
     public void Validate()
     {
         if (Id.IsEmpty())

MagicCarpetProject/MagicCarpetContracts/DataModels/PostDataModel.cs

@@ -2,6 +2,10 @@
 using MagicCarpetContracts.Exceptions;
 using MagicCarpetContracts.Extensions;
 using MagicCarpetContracts.Infrastructure;
+using MagicCarpetContracts.Infrastructure.PostConfigurations;
+using Microsoft.Extensions.Configuration;
+using Newtonsoft.Json.Linq;
+using Newtonsoft.Json;
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -10,15 +14,26 @@ using System.Threading.Tasks;
 
 namespace MagicCarpetContracts.DataModels;
 
-public class PostDataModel(string id, string postId, string postName, PostType postType, double salary, bool isActual, DateTime changeDate) : IValidation
+public class PostDataModel(string postId, string postName, PostType postType, PostConfiguration configuration) : IValidation
 {
-    public string Id { get; private set; } = id;
-    public string PostId { get; private set; } = postId;
+    public string Id { get; private set; } = postId;
     public string PostName { get; private set; } = postName;
     public PostType PostType { get; private set; } = postType;
-    public double Salary { get; private set; } = salary;
-    public bool IsActual { get; private set; } = isActual;
-    public DateTime ChangeDate { get; private set; } = changeDate;
+    public PostConfiguration ConfigurationModel { get; private set; } = configuration;
+
+    public PostDataModel(string postId, string postName, PostType postType, string configurationJson) : this(postId, postName, postType, (PostConfiguration)null)
+    {
+        var obj = JToken.Parse(configurationJson);
+        if (obj is not null)
+        {
+            ConfigurationModel = obj.Value<string>("Type") switch
+            {
+                nameof(TravelAgentPostConfiguration) => JsonConvert.DeserializeObject<TravelAgentPostConfiguration>(configurationJson)!,
+                nameof(ChiefPostConfiguration) => JsonConvert.DeserializeObject<ChiefPostConfiguration>(configurationJson)!,
+                _ => JsonConvert.DeserializeObject<PostConfiguration>(configurationJson)!,
+            };
+        }
+    }
 
     public void Validate()
     {
@@ -26,15 +41,13 @@ public class PostDataModel(string id, string postId, string postName, PostType p
             throw new ValidationException("Field Id is empty");
         if (!Id.IsGuid())
             throw new ValidationException("The value in the field Id is not a unique identifier");
-        if (PostId.IsEmpty())
-            throw new ValidationException("Field PostId is empty");
-        if (!PostId.IsGuid())
-            throw new ValidationException("The value in the field PostId is not a unique identifier");
         if (PostName.IsEmpty())
             throw new ValidationException("Field PostName is empty");
         if (PostType == PostType.None)
             throw new ValidationException("Field PostType is empty");
-        if (Salary <= 0)
-            throw new ValidationException("Field Salary is empty");
+        if (ConfigurationModel is null)
+            throw new ValidationException("Field ConfigurationModel is not initialized");
+        if (ConfigurationModel!.Rate <= 0)
+            throw new ValidationException("Field Rate is less or equal zero");
     }
 }

MagicCarpetProject/MagicCarpetContracts/DataModels/SalaryDataModel.cs

@@ -11,12 +11,20 @@ namespace MagicCarpetContracts.DataModels;
 
 public class SalaryDataModel(string employeeId, DateTime salaryDate, double employeeSalary) : IValidation
 {
+    private readonly EmployeeDataModel? _employee;
     public string EmployeeId { get; private set; } = employeeId;
 
     public DateTime SalaryDate { get; private set; } = salaryDate;
 
     public double Salary { get; private set; } = employeeSalary;
 
+    public string EmployeeFIO => _employee?.FIO ?? string.Empty;
+
+    public SalaryDataModel(string employeeId, DateTime salaryDate, double employeeSalary, EmployeeDataModel employee) : this(employeeId, salaryDate, employeeSalary)
+    {
+        _employee = employee;
+    }
+
     public void Validate()
     {
         if (EmployeeId.IsEmpty())

MagicCarpetProject/MagicCarpetContracts/DataModels/SaleDataModel.cs

@@ -10,25 +10,78 @@ using System.Threading.Tasks;
 
 namespace MagicCarpetContracts.DataModels;
 
-public class SaleDataModel(string id, string employeeId, string? clientId, double sum, DiscountType discountType,
-    double discount, bool isCancel, List<SaleTourDataModel> tours) : IValidation
+public class SaleDataModel : IValidation
 {
-    public string Id { get; private set; } = id;
+    private readonly ClientDataModel? _client;
 
-    public string EmployeeId { get; private set; } = employeeId;
+    private readonly EmployeeDataModel? _employee;
 
-    public string? ClientId { get; private set; } = clientId;
+    public string Id { get; private set; }
+
+    public string EmployeeId { get; private set; }
+
+    public string? ClientId { get; private set; }
 
     public DateTime SaleDate { get; private set; } = DateTime.UtcNow;
-    public double Sum { get; private set; } = sum;
 
-    public DiscountType DiscountType { get; private set; } = discountType;
+    public double Sum { get; private set; }
 
-    public double Discount { get; private set; } = discount;
+    public DiscountType DiscountType { get; private set; }
 
-    public bool IsCancel { get; private set; } = isCancel;
+    public double Discount { get; private set; }
 
-    public List<SaleTourDataModel> Tours { get; private set; } = tours;
+    public bool IsCancel { get; private set; }
+
+    public List<SaleTourDataModel>? Tours { get; private set; }
+
+    public string ClientFIO => _client?.FIO ?? string.Empty;
+
+    public string EmployeeFIO => _employee?.FIO ?? string.Empty;
+
+    public SaleDataModel(string id, string employeeId, string? clientId, DiscountType discountType, bool isCancel, List<SaleTourDataModel> saleTours)
+    {
+        Id = id;
+        EmployeeId = employeeId;
+        ClientId = clientId;
+        DiscountType = discountType;
+        IsCancel = isCancel;
+        Tours = saleTours;
+        var percent = 0.0;
+        foreach (DiscountType elem in Enum.GetValues<DiscountType>())
+        {
+            if ((elem & discountType) != 0)
+            {
+                switch (elem)
+                {
+                    case DiscountType.None:
+                        break;
+                    case DiscountType.OnSale:
+                        percent += 0.1;
+                        break;
+                    case DiscountType.RegularCustomer:
+                        percent += 0.5;
+                        break;
+                    case DiscountType.Certificate:
+                        percent += 0.3;
+                        break;
+                }
+            }
+        }
+        Sum = Tours?.Sum(x => x.Price * x.Count) ?? 0;
+        Discount = Sum * percent;
+    }
+
+    public SaleDataModel(string id, string employeeId, string? clientId, double sum, DiscountType discountType, double discount, bool isCancel,
+        List<SaleTourDataModel> saleTours, EmployeeDataModel employee, ClientDataModel? client) : this(id, employeeId, clientId, discountType, isCancel, saleTours)
+    {
+        Sum = sum;
+        Discount = discount;
+        _employee = employee;
+        _client = client;
+    }
+
+    public SaleDataModel(string id, string employeeId, string? clientId, int discountType, 
+        List<SaleTourDataModel> tours) : this(id, employeeId, clientId, (DiscountType)discountType, false, tours) { }
 
     public void Validate()
     {

MagicCarpetProject/MagicCarpetContracts/DataModels/SaleTourDataModel.cs

@@ -3,20 +3,32 @@ using MagicCarpetContracts.Extensions;
 using MagicCarpetContracts.Infrastructure;
 using System;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 
 namespace MagicCarpetContracts.DataModels;
 
-public class SaleTourDataModel(string saleId, string cocktailId, int count) : IValidation
+public class SaleTourDataModel(string saleId, string tourId, int count, double price) : IValidation
 {
+    private readonly TourDataModel? _tour;
+
     public string SaleId { get; private set; } = saleId;
 
-    public string TourId { get; private set; } = cocktailId;
+    public string TourId { get; private set; } = tourId;
 
     public int Count { get; private set; } = count;
 
+    public double Price { get; private set; } = price;
+
+    public string TourName => _tour?.TourName ?? string.Empty;
+
+    public SaleTourDataModel(string saleId, string tourId, int count, double price, TourDataModel tour) : this(saleId, tourId, count, price)
+    {
+        _tour = tour;
+    }
+
     public void Validate()
     {
         if (SaleId.IsEmpty())
@@ -33,5 +45,8 @@ public class SaleTourDataModel(string saleId, string cocktailId, int count) : IV
 
         if (Count <= 0)
             throw new ValidationException("Field Count is less than or equal to 0");
+
+        if (Price <= 0)
+            throw new ValidationException("Field Price is less than or equal to 0");
     }
 }

MagicCarpetProject/MagicCarpetContracts/DataModels/SuppliesDataModel.cs

@@ -0,0 +1,35 @@
+using MagicCarpetContracts.Enums;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.Extensions;
+using MagicCarpetContracts.Infrastructure;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using static System.Runtime.InteropServices.JavaScript.JSType;
+
+namespace MagicCarpetContracts.DataModels;
+
+public class SuppliesDataModel(string id, TourType tourType, DateTime productuionDate, int count, List<TourSuppliesDataModel> tours) : IValidation
+{
+    public string Id { get; private set; } = id;
+    public TourType TourType { get; private set; } = tourType;
+    public DateTime ProductuionDate { get; private set; } = productuionDate;
+    public int Count { get; private set; } = count;
+    public List<TourSuppliesDataModel> Tours { get; private set; } = tours;
+
+    public void Validate()
+    {
+        if (Id.IsEmpty())
+            throw new ValidationException("Field Id is empty");
+        if (!Id.IsGuid())
+            throw new ValidationException("The value in the field Id is not a unique identifier");
+        if (TourType == TourType.None)
+            throw new ValidationException("Field Type is empty");
+        if (Count <= 0)
+            throw new ValidationException("Field Count is less than or equal to 0");
+        if ((Tours?.Count ?? 0) == 0)
+            throw new ValidationException("The sale must include tours");
+    }
+}

MagicCarpetProject/MagicCarpetContracts/DataModels/TourAgencyDataModel.cs

@@ -0,0 +1,32 @@
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.Extensions;
+using MagicCarpetContracts.Infrastructure;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.DataModels;
+
+public class TourAgencyDataModel(string agencyId, string tourId, int count) : IValidation
+{
+    public string AgencyId { get; private set; } = agencyId;
+    public string TourId { get; private set; } = tourId;
+    public int Count { get; private set; } = count;
+
+    public void Validate()
+    {
+        if (AgencyId.IsEmpty())
+            throw new ValidationException("Field AgencyId is empty");
+        if (!AgencyId.IsGuid())
+            throw new ValidationException("The value in the field AgencyId is not a unique identifier");
+        if (TourId.IsEmpty())
+            throw new ValidationException("Field TourId is empty");
+        if (!TourId.IsGuid())
+            throw new ValidationException("The value in the field TourId is not a unique identifier");
+        if (Count <= 0)
+            throw new ValidationException("Field Count is less than or equal to 0");
+    }
+}

MagicCarpetProject/MagicCarpetContracts/DataModels/TourDataModel.cs

@@ -18,7 +18,7 @@ public class TourDataModel(string id, string tourName, string tourCountry, doubl
     public string TourName { get; private set; } = tourName;
     public string TourCountry { get; private set; } = tourCountry;
     public double Price { get; private set; } = price;
-    public TourType Type { get; private set; } = tourType;
+    public TourType TourType { get; private set; } = tourType;
 
     public void Validate()
     {
@@ -32,7 +32,7 @@ public class TourDataModel(string id, string tourName, string tourCountry, doubl
             throw new ValidationException("Field TourCountry is empty");
         if (Price <= 0)
             throw new ValidationException("Field Price is less than or equal to 0");
-        if (Type == TourType.None)
+        if (TourType == TourType.None)
             throw new ValidationException("Field Type is empty");
     }
 }

MagicCarpetProject/MagicCarpetContracts/DataModels/TourHistoryDataModel.cs

@@ -11,12 +11,22 @@ namespace MagicCarpetContracts.DataModels;
 
 public class TourHistoryDataModel(string tourId, double oldPrice) : IValidation
 {
+    private readonly TourDataModel? _tour;
+
     public string TourId { get; private set; } = tourId;
 
     public double OldPrice { get; private set; } = oldPrice;
 
     public DateTime ChangeDate { get; private set; } = DateTime.UtcNow;
 
+    public string TourName => _tour?.TourName ?? string.Empty;
+
+    public TourHistoryDataModel(string tourId, double oldPrice, DateTime changeDate, TourDataModel tour) : this(tourId, oldPrice)
+    {
+        ChangeDate = changeDate;
+        _tour = tour;
+    }
+
     public void Validate()
     {
         if (TourId.IsEmpty())

MagicCarpetProject/MagicCarpetContracts/DataModels/TourSuppliesDataModel.cs

@@ -0,0 +1,32 @@
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.Extensions;
+using MagicCarpetContracts.Infrastructure;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.DataModels;
+
+public class TourSuppliesDataModel(string suppliesId, string tourId, int count) : IValidation
+{
+    public string SuppliesId { get; private set; } = suppliesId;
+    public string TourId { get; private set; } = tourId;
+    public int Count { get; private set; } = count;
+
+    public void Validate()
+    {
+        if (SuppliesId.IsEmpty())
+            throw new ValidationException("Field SuppliesId is empty");
+        if (!SuppliesId.IsGuid())
+            throw new ValidationException("The value in the field SuppliesId is not a unique identifier");
+        if (TourId.IsEmpty())
+            throw new ValidationException("Field TourId is empty");
+        if (!TourId.IsGuid())
+            throw new ValidationException("The value in the field BlandId is not a unique identifier");
+        if (Count <= 0)
+            throw new ValidationException("Field Count is less than or equal to 0");
+    }
+}

MagicCarpetProject/MagicCarpetContracts/Exceptions/ElementDeletedException.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.Exceptions;
+
+public class ElementDeletedException : Exception
+{
+    public ElementDeletedException(string id) : base($"Cannot modify a deleted item (id: {id})") { }
+}

MagicCarpetProject/MagicCarpetContracts/Exceptions/ElementExistsException.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.Exceptions;
+
+public class ElementExistsException : Exception
+{
+    public string ParamName { get; private set; }
+
+    public string ParamValue { get; private set; }
+
+    public ElementExistsException(string paramName, string paramValue) : base($"There is already an element with value{paramValue} of parameter {paramName}")
+    {
+        ParamName = paramName;
+        ParamValue = paramValue;
+    }
+}

MagicCarpetProject/MagicCarpetContracts/Exceptions/ElementNotFoundException .cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.Exceptions;
+
+public class ElementNotFoundException : Exception
+{
+    public string Value { get; private set; }
+
+    public ElementNotFoundException(string value) : base($"Element not found at value = {value}")
+    {
+        Value = value;
+    }
+}

MagicCarpetProject/MagicCarpetContracts/Exceptions/IncorrectDatesException .cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.Exceptions;
+
+public class IncorrectDatesException : Exception
+{
+    public IncorrectDatesException(DateTime start, DateTime end) : base($"The end date must be later than the start date.. StartDate: " +
+        $"{start:dd.MM.YYYY}. EndDate: {end:dd.MM.YYYY}") { }
+}

MagicCarpetProject/MagicCarpetContracts/Exceptions/InsufficientException.cs

@@ -0,0 +1,11 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.Exceptions;
+
+public class InsufficientException(string message) : Exception(message)
+{
+}

MagicCarpetProject/MagicCarpetContracts/Exceptions/NullListException.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.Exceptions;
+
+public class NullListException : Exception
+{
+    public NullListException() : base("The returned list is null") { }
+}

MagicCarpetProject/MagicCarpetContracts/Exceptions/StorageException .cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.Exceptions;
+
+public class StorageException : Exception
+{
+    public StorageException(Exception ex) : base($"Error while working in storage: {ex.Message}", ex) { }
+}

MagicCarpetProject/MagicCarpetContracts/Extensions/DateTimeExtensions.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.Extensions;
+
+public static class DateTimeExtensions
+{
+    public static bool IsDateNotOlder(this DateTime date, DateTime olderDate)
+    {
+        return date >= olderDate;
+    }
+}

MagicCarpetProject/MagicCarpetContracts/Infrastructure/IConfigurationDatabase.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.Infrastructure;
+
+public interface IConfigurationDatabase
+{
+    string ConnectionString { get; }
+}

MagicCarpetProject/MagicCarpetContracts/Infrastructure/IConfigurationSalary.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.Infrastructure;
+
+public interface IConfigurationSalary
+{
+    double ExtraSaleSum { get; }
+
+    int MaxConcurrentThreads { get; }
+}

MagicCarpetProject/MagicCarpetContracts/Infrastructure/OperationResponse.cs

@@ -0,0 +1,47 @@
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.Infrastructure;
+
+public class OperationResponse
+{
+    public HttpStatusCode StatusCode { get; set; }
+
+    public object? Result { get; set; }
+
+    public IActionResult GetResponse(HttpRequest request, HttpResponse response)
+    {
+        ArgumentNullException.ThrowIfNull(request);
+        ArgumentNullException.ThrowIfNull(response);
+
+        response.StatusCode = (int)StatusCode;
+
+        if (Result is null)
+        {
+            return new StatusCodeResult((int)StatusCode);
+        }
+
+        return new ObjectResult(Result);
+    }
+
+    protected static TResult OK<TResult, TData>(TData data) where TResult : OperationResponse,
+        new() => new() { StatusCode = HttpStatusCode.OK, Result = data };
+
+    protected static TResult NoContent<TResult>() where TResult : OperationResponse,
+        new() => new() { StatusCode = HttpStatusCode.NoContent };
+
+    protected static TResult BadRequest<TResult>(string? errorMessage = null) where TResult : OperationResponse,
+        new() => new() { StatusCode = HttpStatusCode.BadRequest, Result = errorMessage };
+
+    protected static TResult NotFound<TResult>(string? errorMessage = null) where TResult : OperationResponse,
+        new() => new() { StatusCode = HttpStatusCode.NotFound, Result = errorMessage };
+
+    protected static TResult InternalServerError<TResult>(string? errorMessage = null) where TResult : OperationResponse,
+        new() => new() { StatusCode = HttpStatusCode.InternalServerError, Result = errorMessage };
+}

MagicCarpetProject/MagicCarpetContracts/Infrastructure/PostConfigurations/ChiefPostConfiguration.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.Infrastructure.PostConfigurations;
+
+public class ChiefPostConfiguration : PostConfiguration
+{
+    public override string Type => nameof(ChiefPostConfiguration);
+    public double PersonalCountTrendPremium { get; set; }
+}

MagicCarpetProject/MagicCarpetContracts/Infrastructure/PostConfigurations/PostConfiguration.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.Infrastructure.PostConfigurations;
+
+public class PostConfiguration
+{
+    public virtual string Type => nameof(PostConfiguration);
+    public double Rate { get; set; }
+}

MagicCarpetProject/MagicCarpetContracts/Infrastructure/PostConfigurations/TravelAgentPostConfiguration.cs

@@ -0,0 +1,15 @@
+using Microsoft.Extensions.Configuration;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.Infrastructure.PostConfigurations;
+
+public class TravelAgentPostConfiguration : PostConfiguration
+{
+    public override string Type => nameof(TravelAgentPostConfiguration);
+    public double SalePercent { get; set; }
+    public double BonusForExtraSales { get; set; }
+}

MagicCarpetProject/MagicCarpetContracts/MagicCarpetContracts.csproj

@@ -6,4 +6,10 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="Microsoft.AspNetCore.Http.Abstractions" Version="2.3.0" />
+    <PackageReference Include="Microsoft.AspNetCore.Mvc.Abstractions" Version="2.3.0" />
+    <PackageReference Include="Microsoft.AspNetCore.Mvc.Core" Version="2.3.0" />
+  </ItemGroup>
+
 </Project>

MagicCarpetProject/MagicCarpetContracts/StoragesContracts/IAgencyStorageContract.cs

@@ -0,0 +1,18 @@
+using MagicCarpetContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.StoragesContracts;
+
+public interface IAgencyStorageContract
+{
+    List<AgencyDataModel> GetList();
+    AgencyDataModel GetElementById(string id);
+    void AddElement(AgencyDataModel agencyDataModel);
+    void UpdElement(AgencyDataModel agencyDataModel);
+    void DelElement(string id);
+    bool CheckComponents(SaleDataModel saleDataModel);
+}

MagicCarpetProject/MagicCarpetContracts/StoragesContracts/IClientStorageContract.cs

@@ -0,0 +1,25 @@
+using MagicCarpetContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.StoragesContracts;
+
+public interface IClientStorageContract
+{
+    List<ClientDataModel> GetList();
+
+    ClientDataModel? GetElementById(string id);
+
+    ClientDataModel? GetElementByPhoneNumber(string phoneNumber);
+
+    ClientDataModel? GetElementByFIO(string fio);
+
+    void AddElement(ClientDataModel clientDataModel);
+
+    void UpdElement(ClientDataModel clientDataModel);
+
+    void DelElement(string id);
+}

MagicCarpetProject/MagicCarpetContracts/StoragesContracts/IEmployeeStorageContract.cs

@@ -0,0 +1,28 @@
+using MagicCarpetContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.StoragesContracts;
+
+public interface IEmployeeStorageContract
+{
+    List<EmployeeDataModel> GetList(bool onlyActive = true, string? postId = null, DateTime? fromBirthDate = null,
+        DateTime? toBirthDate = null, DateTime? fromEmploymentDate = null, DateTime? toEmploymentDate = null);
+
+    EmployeeDataModel? GetElementById(string id);
+
+    EmployeeDataModel? GetElementByFIO(string fio);
+
+    EmployeeDataModel? GetElementByEmail(string email);
+
+    void AddElement(EmployeeDataModel employeeDataModel);
+
+    void UpdElement(EmployeeDataModel employeeDataModel);
+
+    void DelElement(string id);
+
+    int GetEmployeeTrend(DateTime fromPeriod, DateTime toPeriod);
+}

MagicCarpetProject/MagicCarpetContracts/StoragesContracts/IPostStorageContract.cs

@@ -0,0 +1,20 @@
+using MagicCarpetContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.StoragesContracts;
+
+public interface IPostStorageContract
+{
+    List<PostDataModel> GetList();
+    List<PostDataModel> GetPostWithHistory(string postId);
+    PostDataModel? GetElementById(string id);
+    PostDataModel? GetElementByName(string name);
+    void AddElement(PostDataModel postDataModel);
+    void UpdElement(PostDataModel postDataModel);
+    void DelElement(string id);
+    void ResElement(string id);
+}

MagicCarpetProject/MagicCarpetContracts/StoragesContracts/ISalaryStorageContract.cs

@@ -0,0 +1,15 @@
+using MagicCarpetContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.StoragesContracts;
+
+public interface ISalaryStorageContract
+{
+    List<SalaryDataModel> GetList(DateTime? startDate, DateTime? endDate, string? employeeId = null);
+
+    void AddElement(SalaryDataModel salaryDataModel);
+}

MagicCarpetProject/MagicCarpetContracts/StoragesContracts/ISaleStorageContract.cs

@@ -0,0 +1,20 @@
+using MagicCarpetContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.StoragesContracts;
+
+public interface ISaleStorageContract
+{
+    List<SaleDataModel> GetList(DateTime? startDate = null, DateTime? endDate = null, string? employeeId = null, 
+        string? clientId = null, string? tourId = null);
+
+    SaleDataModel? GetElementById(string id);
+
+    void AddElement(SaleDataModel saleDataModel);
+
+    void DelElement(string id);
+}

MagicCarpetProject/MagicCarpetContracts/StoragesContracts/ISuppliesStorageContract.cs

@@ -0,0 +1,16 @@
+using MagicCarpetContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.StoragesContracts;
+
+public interface ISuppliesStorageContract
+{
+    List<SuppliesDataModel> GetList(DateTime? startDate = null, DateTime? endDate = null);
+    SuppliesDataModel GetElementById(string id);
+    void AddElement(SuppliesDataModel suppliesDataModel);
+    void UpdElement(SuppliesDataModel suppliesDataModel);
+}

MagicCarpetProject/MagicCarpetContracts/StoragesContracts/ITourStorageContract.cs

@@ -0,0 +1,19 @@
+using MagicCarpetContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.StoragesContracts;
+
+public interface ITourStorageContract
+{
+    List<TourDataModel> GetList();
+    List<TourHistoryDataModel> GetHistoryByTourId(string tourId);
+    TourDataModel? GetElementById(string id);
+    TourDataModel? GetElementByName(string name);
+    void AddElement(TourDataModel tourDataModel);
+    void UpdElement(TourDataModel tourDataModel);
+    void DelElement(string id);
+}

MagicCarpetProject/MagicCarpetContracts/ViewModels/AgencyViewModel.cs

@@ -0,0 +1,16 @@
+using MagicCarpetContracts.Enums;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.ViewModels;
+
+public class AgencyViewModel
+{
+    public required string Id { get; set; }
+    public required TourType TourType { get; set; }
+    public required int Count { get; set; }
+    public required List<TourAgencyViewModel> Tours { get; set; }
+}

MagicCarpetProject/MagicCarpetContracts/ViewModels/ClientViewModel.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.ViewModels;
+
+public class ClientViewModel
+{
+    public required string Id { get; set; }
+
+    public required string FIO { get; set; }
+
+    public required string PhoneNumber { get; set; }
+
+    public double DiscountSize { get; set; }
+}

MagicCarpetProject/MagicCarpetContracts/ViewModels/EmployeeViewModel.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.ViewModels;
+
+public class EmployeeViewModel
+{
+    public required string Id { get; set; }
+
+    public required string FIO { get; set; }
+
+    public string Email { get; set; }
+
+    public required string PostId { get; set; }
+
+    public required string PostName { get; set; }
+
+    public bool IsDeleted { get; set; }
+
+    public DateTime BirthDate { get; set; }
+
+    public DateTime EmploymentDate { get; set; }
+}

MagicCarpetProject/MagicCarpetContracts/ViewModels/PostViewModel.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.ViewModels;
+
+public class PostViewModel
+{
+    public required string Id { get; set; }
+
+    public required string PostName { get; set; }
+
+    public required string PostType { get; set; }
+
+    public required string Configuration { get; set; }
+}

MagicCarpetProject/MagicCarpetContracts/ViewModels/SalaryViewModel.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.ViewModels;
+
+public class SalaryViewModel
+{
+    public required string EmployeeId { get; set; }
+    public required string EmployeeFIO { get; set; }
+    public DateTime SalaryDate { get; set; }
+    public double Salary { get; set; }
+}

MagicCarpetProject/MagicCarpetContracts/ViewModels/SaleTourViewModel.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.ViewModels;
+
+public class SaleTourViewModel
+{
+    public required string TourId { get; set; }
+
+    public required string TourName { get; set; }
+
+    public int Count { get; set; }
+
+    public double Price { get; set; }
+}

MagicCarpetProject/MagicCarpetContracts/ViewModels/SaleViewModel.cs

@@ -0,0 +1,32 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.ViewModels;
+
+public class SaleViewModel
+{
+    public required string Id { get; set; }
+
+    public required string EmployeeId { get; set; }
+
+    public required string EmployeeFIO { get; set; }
+
+    public string? ClientId { get; set; }
+
+    public string? ClientFIO { get; set; }
+
+    public DateTime SaleDate { get; set; }
+
+    public double Sum { get; set; }
+
+    public required string DiscountType { get; set; }
+
+    public double Discount { get; set; }
+
+    public bool IsCancel { get; set; }
+
+    public required List<SaleTourViewModel> Tours { get; set; }
+}

MagicCarpetProject/MagicCarpetContracts/ViewModels/SuppliesViewModel.cs

@@ -0,0 +1,17 @@
+using MagicCarpetContracts.Enums;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.ViewModels;
+
+public class SuppliesViewModel
+{
+    public required string Id { get; set; }
+    public required TourType TourType { get; set; }
+    public DateTime ProductuionDate { get; set; }
+    public int Count { get; set; }
+    public required List<TourSuppliesViewModel> Tours { get; set; }
+}

MagicCarpetProject/MagicCarpetContracts/ViewModels/TourAgencyViewModel.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.ViewModels;
+
+public class TourAgencyViewModel
+{
+    public required string AgencyId { get; set; }
+    public required string TourId { get; set; }
+    public int Count { get; set; }
+}

MagicCarpetProject/MagicCarpetContracts/ViewModels/TourHistoryViewModel.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.ViewModels;
+
+public class TourHistoryViewModel
+{
+    public required string TourName { get; set; }
+
+    public double OldPrice { get; set; }
+
+    public DateTime ChangeDate { get; set; }
+}

MagicCarpetProject/MagicCarpetContracts/ViewModels/TourSuppliesViewModel.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.ViewModels;
+
+public class TourSuppliesViewModel
+{
+    public required string SuppliesId { get; set; }
+    public required string TourId { get; set; }
+    public int Count { get; set; }
+}

MagicCarpetProject/MagicCarpetContracts/ViewModels/TourViewModel.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.ViewModels;
+
+public class TourViewModel
+{
+    public required string Id { get; set; }
+
+    public required string TourName { get; set; }
+
+    public required string TourType { get; set; }
+
+    public string? TourCountry { get; set; }
+
+    public double Price { get; set; }
+}

MagicCarpetProject/MagicCarpetDatabase/DefaultConfigurationDatabase.cs

@@ -0,0 +1,8 @@
+using MagicCarpetContracts.Infrastructure;
+
+namespace MagicCarpetDatabase;
+
+class DefaultConfigurationDatabase : IConfigurationDatabase
+{
+    public string ConnectionString => "";
+}

MagicCarpetProject/MagicCarpetDatabase/Implementations/AgencyStorageContract.cs

@@ -0,0 +1,148 @@
+using AutoMapper;
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.StoragesContracts;
+using MagicCarpetDatabase.Models;
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetDatabase.Implementations;
+
+public class AgencyStorageContract : IAgencyStorageContract
+{
+    private readonly MagicCarpetDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public AgencyStorageContract(MagicCarpetDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.AddMaps(typeof(TourAgency));
+            cfg.AddMaps(typeof(Agency));
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<AgencyDataModel> GetList()
+    {
+        try
+        {
+            return [.. _dbContext.Agencies.Select(x => _mapper.Map<AgencyDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public AgencyDataModel GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<AgencyDataModel>(GetAgencyById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(AgencyDataModel agencyDataModel)
+    {
+        try
+        {
+            _dbContext.Agencies.Add(_mapper.Map<Agency>(agencyDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void UpdElement(AgencyDataModel agencyDataModel)
+    {
+        try
+        {
+            var element = GetAgencyById(agencyDataModel.Id) ?? throw new ElementNotFoundException(agencyDataModel.Id);
+            _dbContext.Agencies.Update(_mapper.Map(agencyDataModel, element));
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void DelElement(string id)
+    {
+        try
+        {
+            var element = GetAgencyById(id) ?? throw new ElementNotFoundException(id);
+            _dbContext.Agencies.Remove(element);
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    //второе требование 
+    public bool CheckComponents(SaleDataModel saleDataModel)
+    {
+        using (var transaction = _dbContext.Database.BeginTransaction())
+        {
+            var componentTasks = saleDataModel.Tours
+                .AsParallel()
+                .Select(async saleComponent =>
+                {
+                    var component = await _dbContext.Tours.FirstOrDefaultAsync(x => x.Id == saleComponent.TourId);
+                    var agency = await _dbContext.Agencies.FirstOrDefaultAsync(x => x.TourType == component.TourType && x.Count >= saleComponent.Count);
+                    if (agency == null)
+                    {
+                        transaction.Rollback();
+                        return false;
+                    }
+                    if (agency.Count - saleComponent.Count == 0)
+                    {
+                        DelElement(agency.Id);
+                    }
+                    else
+                    {
+                        agency.Count -= saleComponent.Count;
+                        _dbContext.Agencies.Update(agency);
+                    }
+
+                    return true;
+                })
+                .ToList();
+
+            Task.WaitAll(componentTasks.ToArray());
+            transaction.Commit();
+            _dbContext.SaveChanges();
+            return true;
+        }
+    }
+
+    private Agency? GetAgencyById(string id) => _dbContext.Agencies.FirstOrDefault(x => x.Id == id);
+}

MagicCarpetProject/MagicCarpetDatabase/Implementations/ClientStorageContract.cs

@@ -0,0 +1,144 @@
+using AutoMapper;
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.StoragesContracts;
+using MagicCarpetDatabase.Models;
+using Microsoft.EntityFrameworkCore;
+using Npgsql;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetDatabase.Implementations;
+
+public class ClientStorageContract : IClientStorageContract
+{
+    private readonly MagicCarpetDbContext _dbContext;
+    private readonly Mapper _mapper;
+    public ClientStorageContract(MagicCarpetDbContext magicCarpetDbContext)
+    {
+        _dbContext = magicCarpetDbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.AddMaps(typeof(MagicCarpetDbContext).Assembly);
+        });
+        _mapper = new Mapper(config);
+    }
+    public List<ClientDataModel> GetList()
+    {
+        try
+        {
+            return [.. _dbContext.Clients.Select(x => _mapper.Map<ClientDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public ClientDataModel? GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<ClientDataModel>(GetClientById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public ClientDataModel? GetElementByFIO(string fio)
+    {
+        try
+        {
+            return _mapper.Map<ClientDataModel>(_dbContext.Clients.FirstOrDefault(x => x.FIO == fio));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public ClientDataModel? GetElementByPhoneNumber(string phoneNumber)
+    {
+        try
+        {
+            return _mapper.Map<ClientDataModel>(_dbContext.Clients.FirstOrDefault(x => x.PhoneNumber == phoneNumber));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public void AddElement(ClientDataModel clientDataModel)
+    {
+        try
+        {
+            _dbContext.Clients.Add(_mapper.Map<Client>(clientDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (InvalidOperationException ex) when (ex.TargetSite?.Name == "ThrowIdentityConflict")
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("Id", clientDataModel.Id);
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Clients_PhoneNumber" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("PhoneNumber", clientDataModel.PhoneNumber);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public void UpdElement(ClientDataModel clientDataModel)
+    {
+        try
+        {
+            var element = GetClientById(clientDataModel.Id) ?? throw new ElementNotFoundException(clientDataModel.Id);
+            _dbContext.Clients.Update(_mapper.Map(clientDataModel, element));
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Clients_PhoneNumber" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("PhoneNumber", clientDataModel.PhoneNumber);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public void DelElement(string id)
+    {
+        try
+        {
+            var element = GetClientById(id) ?? throw new ElementNotFoundException(id);
+            _dbContext.Clients.Remove(element);
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    private Client? GetClientById(string id) => _dbContext.Clients.FirstOrDefault(x => x.Id == id);
+}

MagicCarpetProject/MagicCarpetDatabase/Implementations/EmployeeStorageContract.cs

@@ -0,0 +1,183 @@
+using AutoMapper;
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.StoragesContracts;
+using MagicCarpetDatabase.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetDatabase.Implementations;
+
+public class EmployeeStorageContract : IEmployeeStorageContract
+{
+    private readonly MagicCarpetDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public EmployeeStorageContract(MagicCarpetDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<Post, PostDataModel>()
+                .ForMember(x => x.Id, x => x.MapFrom(src => src.PostId));
+            cfg.CreateMap<Employee, EmployeeDataModel>();
+            cfg.CreateMap<EmployeeDataModel, Employee>();
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<EmployeeDataModel> GetList(bool onlyActive = true, string? postId = null, DateTime? fromBirthDate = null, DateTime? toBirthDate = null, DateTime? fromEmploymentDate = null, DateTime? toEmploymentDate = null)
+    {
+        try
+        {
+            var query = _dbContext.Employees.AsQueryable();
+            if (onlyActive)
+            {
+                query = query.Where(x => !x.IsDeleted);
+            }
+            if (postId is not null)
+            {
+                query = query.Where(x => x.PostId == postId);
+            }
+            if (fromBirthDate is not null && toBirthDate is not null)
+            {
+                query = query.Where(x => x.BirthDate >= DateTime.SpecifyKind(fromBirthDate ?? DateTime.UtcNow, DateTimeKind.Utc) && x.BirthDate <= DateTime.SpecifyKind(toBirthDate ?? DateTime.UtcNow, DateTimeKind.Utc));
+            }
+            if (fromEmploymentDate is not null && toEmploymentDate is not null)
+            {
+                query = query.Where(x => x.EmploymentDate >= DateTime.SpecifyKind(fromEmploymentDate ?? DateTime.UtcNow, DateTimeKind.Utc) && x.EmploymentDate <= DateTime.SpecifyKind(toEmploymentDate ?? DateTime.UtcNow, DateTimeKind.Utc));
+            }
+            return [.. JoinPost(query).Select(x => _mapper.Map<EmployeeDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public EmployeeDataModel? GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<EmployeeDataModel>(GetEmployeeById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public EmployeeDataModel? GetElementByFIO(string fio)
+    {
+        try
+        {
+            return _mapper.Map<EmployeeDataModel>(AddPost(_dbContext.Employees.FirstOrDefault(x => x.FIO == fio && !x.IsDeleted)));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public EmployeeDataModel? GetElementByEmail(string email)
+    {
+        try
+        {
+            return _mapper.Map<EmployeeDataModel>(AddPost(_dbContext.Employees.FirstOrDefault(x => x.Email == email && !x.IsDeleted)));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(EmployeeDataModel employeeDataModel)
+    {
+        try
+        {
+            _dbContext.Employees.Add(_mapper.Map<Employee>(employeeDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (InvalidOperationException ex) when (ex.TargetSite?.Name == "ThrowIdentityConflict")
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("Id", employeeDataModel.Id);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void UpdElement(EmployeeDataModel employeeDataModel)
+    {
+        try
+        {
+            var element = GetEmployeeById(employeeDataModel.Id) ?? throw new ElementNotFoundException(employeeDataModel.Id);
+            _dbContext.Employees.Update(_mapper.Map(employeeDataModel, element));
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void DelElement(string id)
+    {
+        try
+        {
+            var element = GetEmployeeById(id) ?? throw new ElementNotFoundException(id);
+            element.IsDeleted = true;
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public int GetEmployeeTrend(DateTime fromPeriod, DateTime toPeriod)
+    {
+        try
+        {
+            var countWorkersOnBegining = _dbContext.Employees.Count(x => x.EmploymentDate < fromPeriod && (!x.IsDeleted || x.DateOfDelete > fromPeriod));
+            var countWorkersOnEnding = _dbContext.Employees.Count(x => x.EmploymentDate < toPeriod && (!x.IsDeleted || x.DateOfDelete > toPeriod));
+            return countWorkersOnEnding - countWorkersOnBegining;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    private Employee? GetEmployeeById(string id) => AddPost(_dbContext.Employees.FirstOrDefault(x => x.Id == id && !x.IsDeleted));
+
+    private IQueryable<Employee> JoinPost(IQueryable<Employee> query)
+        => query.GroupJoin(_dbContext.Posts.Where(x => x.IsActual), x => x.PostId, y => y.PostId, (x, y) => new { Employee = x, Post = y })
+                .SelectMany(xy => xy.Post.DefaultIfEmpty(), (x, y) => x.Employee.AddPost(y));
+
+    private Employee? AddPost(Employee? employee)
+        => employee?.AddPost(_dbContext.Posts.FirstOrDefault(x => x.PostId == employee.PostId && x.IsActual));
+}

MagicCarpetProject/MagicCarpetDatabase/Implementations/PostStorageContract.cs

@@ -0,0 +1,193 @@
+using AutoMapper;
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.StoragesContracts;
+using MagicCarpetDatabase.Models;
+using Microsoft.EntityFrameworkCore;
+using Npgsql;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetDatabase.Implementations;
+
+public class PostStorageContract : IPostStorageContract
+{
+    private readonly MagicCarpetDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public PostStorageContract(MagicCarpetDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<Post, PostDataModel>()
+                .ForMember(x => x.Id, x => x.MapFrom(src => src.PostId));
+            cfg.CreateMap<PostDataModel, Post>()
+                .ForMember(x => x.Id, x => x.Ignore())
+                .ForMember(x => x.PostId, x => x.MapFrom(src => src.Id))
+                .ForMember(x => x.IsActual, x => x.MapFrom(src => true))
+                .ForMember(x => x.ChangeDate, x => x.MapFrom(src => DateTime.UtcNow))
+                .ForMember(x => x.Configuration, x => x.MapFrom(src =>
+                    src.ConfigurationModel));
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<PostDataModel> GetList()
+    {
+        try
+        {
+            return [.. _dbContext.Posts.Select(x => _mapper.Map<PostDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public List<PostDataModel> GetPostWithHistory(string postId)
+    {
+        try
+        {
+            return [.. _dbContext.Posts.Where(x => x.PostId == postId).Select(x => _mapper.Map<PostDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public PostDataModel? GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<PostDataModel>(_dbContext.Posts.FirstOrDefault(x => x.PostId == id && x.IsActual));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public PostDataModel? GetElementByName(string name)
+    {
+        try
+        {
+            return _mapper.Map<PostDataModel>(_dbContext.Posts.FirstOrDefault(x => x.PostName == name && x.IsActual));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(PostDataModel postDataModel)
+    {
+        try
+        {
+            _dbContext.Posts.Add(_mapper.Map<Post>(postDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Posts_PostName_IsActual" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("PostName", postDataModel.PostName);
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Posts_PostId_IsActual" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("PostId", postDataModel.Id);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void UpdElement(PostDataModel postDataModel)
+    {
+        try
+        {
+            var transaction = _dbContext.Database.BeginTransaction();
+            try
+            {
+                var element = GetPostById(postDataModel.Id) ?? throw new ElementNotFoundException(postDataModel.Id);
+                if (!element.IsActual)
+                {
+                    throw new ElementDeletedException(postDataModel.Id);
+                }
+                element.IsActual = false;
+                _dbContext.SaveChanges();
+                var newElement = _mapper.Map<Post>(postDataModel);
+                _dbContext.Posts.Add(newElement);
+                _dbContext.SaveChanges();
+                transaction.Commit();
+            }
+            catch
+            {
+                transaction.Rollback();
+                throw;
+            }
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Posts_PostName_IsActual" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("PostName", postDataModel.PostName);
+        }
+        catch (Exception ex) when (ex is ElementDeletedException || ex is ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void DelElement(string id)
+    {
+        try
+        {
+            var element = GetPostById(id) ?? throw new ElementNotFoundException(id);
+            if (!element.IsActual)
+            {
+                throw new ElementDeletedException(id);
+            }
+            element.IsActual = false;
+            _dbContext.SaveChanges();
+        }
+        catch
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+    }
+
+    public void ResElement(string id)
+    {
+        try
+        {
+            var element = GetPostById(id) ?? throw new ElementNotFoundException(id);
+            element.IsActual = true;
+            _dbContext.SaveChanges();
+        }
+        catch
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+    }
+
+    private Post? GetPostById(string id) => _dbContext.Posts.Where(x => x.PostId == id)
+        .OrderByDescending(x => x.ChangeDate).FirstOrDefault();
+}

MagicCarpetProject/MagicCarpetDatabase/Implementations/SalaryStorageContract.cs

@@ -0,0 +1,66 @@
+using AutoMapper;
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.StoragesContracts;
+using MagicCarpetDatabase.Models;
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetDatabase.Implementations;
+
+public class SalaryStorageContract : ISalaryStorageContract
+{
+    private readonly MagicCarpetDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public SalaryStorageContract(MagicCarpetDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<Employee, EmployeeDataModel>();
+            cfg.CreateMap<Salary, SalaryDataModel>();
+            cfg.CreateMap<SalaryDataModel, Salary>()
+                .ForMember(dest => dest.EmployeeSalary, opt => opt.MapFrom(src => src.Salary));
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<SalaryDataModel> GetList(DateTime? startDate, DateTime? endDate, string? employeeId = null)
+    {
+        try
+        {
+            var query = _dbContext.Salaries.Include(d => d.Employee).AsQueryable();
+            if (startDate.HasValue)
+                query = query.Where(x => x.SalaryDate >= DateTime.SpecifyKind(startDate ?? DateTime.UtcNow, DateTimeKind.Utc));
+            if (endDate.HasValue)
+                query = query.Where(x => x.SalaryDate <= DateTime.SpecifyKind(endDate ?? DateTime.UtcNow, DateTimeKind.Utc));
+            if (employeeId != null)
+                query = query.Where(x => x.EmployeeId == employeeId);
+            return [.. query.Select(x => _mapper.Map<SalaryDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(SalaryDataModel salaryDataModel)
+    {
+        try
+        {
+            _dbContext.Salaries.Add(_mapper.Map<Salary>(salaryDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+}

MagicCarpetProject/MagicCarpetDatabase/Implementations/SaleStorageContract.cs

@@ -0,0 +1,123 @@
+using AutoMapper;
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.StoragesContracts;
+using MagicCarpetDatabase.Models;
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetDatabase.Implementations;
+
+public class SaleStorageContract : ISaleStorageContract
+{
+    private readonly MagicCarpetDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public SaleStorageContract(MagicCarpetDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<Client, ClientDataModel>();
+            cfg.CreateMap<Tour, TourDataModel>();
+            cfg.CreateMap<Employee, EmployeeDataModel>();
+            cfg.CreateMap<SaleTour, SaleTourDataModel>();
+            cfg.CreateMap<SaleTourDataModel, SaleTour>()
+                    .ForMember(x => x.Tour, x => x.Ignore());
+            cfg.CreateMap<Sale, SaleDataModel>();
+            cfg.CreateMap<SaleDataModel, Sale>()
+                .ForMember(x => x.IsCancel, x => x.MapFrom(src => false))
+                .ForMember(x => x.SaleTours, x => x.MapFrom(src => src.Tours))
+                .ForMember(x => x.Employee, x => x.Ignore())
+                .ForMember(x => x.Client, x => x.Ignore());
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<SaleDataModel> GetList(DateTime? startDate = null, DateTime? endDate = null, string? employeeId = null, string? clientId = null, string? tourId = null)
+    {
+        try
+        {
+            var query = _dbContext.Sales
+                .Include(r => r.Employee)
+                .Include(r => r.Client)
+                .Include(r => r.SaleTours)!
+                .ThenInclude(d => d.Tour)
+                .AsQueryable();
+            if (startDate.HasValue)
+                query = query.Where(x => x.SaleDate >= DateTime.SpecifyKind(startDate ?? DateTime.UtcNow, DateTimeKind.Utc));
+            if (endDate.HasValue)
+                query = query.Where(x => x.SaleDate <= DateTime.SpecifyKind(endDate ?? DateTime.UtcNow, DateTimeKind.Utc));
+            if (employeeId != null)
+                query = query.Where(x => x.EmployeeId == employeeId);
+            if (clientId != null)
+                query = query.Where(x => x.ClientId == clientId);
+            if (tourId != null)
+                query = query.Where(x => x.SaleTours!.Any(y => y.TourId == tourId));
+            var s = query.ToList();
+            return [.. query.Select(x => _mapper.Map<SaleDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public SaleDataModel? GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<SaleDataModel>(GetSaleById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(SaleDataModel saleDataModel)
+    {
+        try
+        {
+            _dbContext.Sales.Add(_mapper.Map<Sale>(saleDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void DelElement(string id)
+    {
+        try
+        {
+            var element = GetSaleById(id) ?? throw new ElementNotFoundException(id);
+            if (element.IsCancel)
+            {
+                throw new ElementDeletedException(id);
+            }
+            element.IsCancel = true;
+            _dbContext.SaveChanges();
+        }
+        catch (Exception ex) when (ex is ElementDeletedException || ex is ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    private Sale? GetSaleById(string id) => _dbContext.Sales.Include(x => x.Client).Include(x => x.Employee).Include(x => x.SaleTours)!.ThenInclude(x => x.Tour).FirstOrDefault(x => x.Id == id);
+}

MagicCarpetProject/MagicCarpetDatabase/Implementations/SuppliesStorageContract.cs

@@ -0,0 +1,105 @@
+using AutoMapper;
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.StoragesContracts;
+using MagicCarpetDatabase.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetDatabase.Implementations;
+
+public class SuppliesStorageContract : ISuppliesStorageContract
+{
+    private readonly MagicCarpetDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public SuppliesStorageContract(MagicCarpetDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<Supplies, SuppliesDataModel>()
+       .ConstructUsing(src => new SuppliesDataModel(
+           src.Id,
+           src.Type,
+           src.ProductuionDate,
+           src.Count,
+           _mapper.Map<List<TourSuppliesDataModel>>(src.Tours)
+       ));
+
+            cfg.CreateMap<SuppliesDataModel, Supplies>();
+            cfg.CreateMap<TourSuppliesDataModel, TourSupplies>().ReverseMap();
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<SuppliesDataModel> GetList(DateTime? startDate = null, DateTime? endDate = null)
+    {
+        try
+        {
+            var query = _dbContext.Supplieses.AsQueryable();
+            if (startDate is not null && endDate is not null)
+            {
+                query = query.Where(x => x.ProductuionDate >= startDate && x.ProductuionDate < endDate);
+            }
+            return [.. query.Select(x => _mapper.Map<SuppliesDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public SuppliesDataModel GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<SuppliesDataModel>(GetSuppliesById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(SuppliesDataModel suppliesDataModel)
+    {
+        try
+        {
+            _dbContext.Supplieses.Add(_mapper.Map<Supplies>(suppliesDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void UpdElement(SuppliesDataModel suppliesDataModel)
+    {
+        try
+        {
+            var element = GetSuppliesById(suppliesDataModel.Id) ?? throw new ElementNotFoundException(suppliesDataModel.Id);
+            _dbContext.Supplieses.Update(_mapper.Map(suppliesDataModel, element));
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    private Supplies? GetSuppliesById(string id) => _dbContext.Supplieses.FirstOrDefault(x => x.Id == id);
+}

MagicCarpetProject/MagicCarpetDatabase/Implementations/TourStorageContract.cs

@@ -0,0 +1,185 @@
+using AutoMapper;
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.StoragesContracts;
+using MagicCarpetDatabase.Models;
+using Microsoft.EntityFrameworkCore;
+using Npgsql;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetDatabase.Implementations;
+
+public class TourStorageContract : ITourStorageContract
+{
+    private readonly MagicCarpetDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public TourStorageContract(MagicCarpetDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<Tour, TourDataModel>();
+            cfg.CreateMap<TourDataModel, Tour>();
+            cfg.CreateMap<TourHistory, TourHistoryDataModel>(); ;
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<TourDataModel> GetList()
+    {
+        try
+        {
+            return [.. _dbContext.Tours.Select(x => _mapper.Map<TourDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public List<TourHistoryDataModel> GetHistoryByTourId(string tourId)
+    {
+        try
+        {
+            return [.. _dbContext.TourHistories.Include(x => x.Tour).Where(x => x.TourId == tourId).OrderByDescending(x => x.ChangeDate).Select(x => _mapper.Map<TourHistoryDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public TourDataModel? GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<TourDataModel>(GetTourById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public TourDataModel? GetElementByName(string name)
+    {
+        try
+        {
+            return _mapper.Map<TourDataModel>(_dbContext.Tours.FirstOrDefault(x => x.TourName == name));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(TourDataModel tourDataModel)
+    {
+        try
+        {
+            _dbContext.Tours.Add(_mapper.Map<Tour>(tourDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (InvalidOperationException ex) when (ex.TargetSite?.Name == "ThrowIdentityConflict")
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("Id", tourDataModel.Id);
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Tours_TourName" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("TourName", tourDataModel.TourName);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void UpdElement(TourDataModel tourDataModel)
+    {
+        try
+        {
+            var transaction = _dbContext.Database.BeginTransaction();
+            try
+            {
+                var element = GetTourById(tourDataModel.Id) ?? throw new ElementNotFoundException(tourDataModel.Id);
+                if (element.Price != tourDataModel.Price)
+                {
+                    _dbContext.TourHistories.Add(new TourHistory() { TourId = element.Id, OldPrice = element.Price });
+                    _dbContext.SaveChanges();
+                }
+                _dbContext.Tours.Update(_mapper.Map(tourDataModel, element));
+                _dbContext.SaveChanges();
+                transaction.Commit();
+            }
+            catch
+            {
+                transaction.Rollback();
+                throw;
+            }
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Tours_TourName" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("TourName", tourDataModel.TourName);
+        }
+        catch (Exception ex) when (ex is ElementDeletedException || ex is ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void DelElement(string id)
+    {
+        try
+        {
+            var element = GetTourById(id) ?? throw new ElementNotFoundException(id);
+            _dbContext.Tours.Remove(element);
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void ResElement(string id)
+    {
+        try
+        {
+            var element = GetTourById(id) ?? throw new ElementNotFoundException(id);
+            _dbContext.SaveChanges();
+        }
+        catch
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+    }
+
+    private Tour? GetTourById(string id) => _dbContext.Tours.FirstOrDefault(x => x.Id == id);
+}

MagicCarpetProject/MagicCarpetDatabase/MagicCarpetDatabase.csproj

@@ -0,0 +1,25 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="AutoMapper" Version="14.0.0" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="9.0.3" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="9.0.3">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
+    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="9.0.3" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\MagicCarpetContracts\MagicCarpetContracts.csproj" />
+  </ItemGroup>
+
+
+</Project>

MagicCarpetProject/MagicCarpetDatabase/MagicCarpetDbContext.cs

@@ -0,0 +1,89 @@
+using MagicCarpetContracts.Infrastructure;
+using MagicCarpetContracts.Infrastructure.PostConfigurations;
+using MagicCarpetDatabase.Models;
+using Microsoft.EntityFrameworkCore;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetDatabase;
+
+public class MagicCarpetDbContext(IConfigurationDatabase configurationDatabase) : DbContext
+{
+    private readonly IConfigurationDatabase? _configurationDatabase = configurationDatabase;
+
+    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
+    {
+        optionsBuilder.UseNpgsql(_configurationDatabase?.ConnectionString, o => o.SetPostgresVersion(12, 2));
+        base.OnConfiguring(optionsBuilder);
+    }
+
+    protected override void OnModelCreating(ModelBuilder modelBuilder)
+    {
+        base.OnModelCreating(modelBuilder);
+
+        modelBuilder.Entity<Client>().HasIndex(x => x.PhoneNumber).IsUnique();
+
+        modelBuilder.Entity<Sale>()
+            .HasOne(e => e.Client)
+            .WithMany(e => e.Sales)
+            .OnDelete(DeleteBehavior.SetNull);
+
+        modelBuilder.Entity<Tour>().HasIndex(x => x.TourName).IsUnique();
+
+        modelBuilder.Entity<Post>()
+            .HasIndex(e => new { e.PostName, e.IsActual })
+            .IsUnique()
+            .HasFilter($"\"{nameof(Post.IsActual)}\" = TRUE");
+
+        modelBuilder.Entity<Post>()
+            .HasIndex(e => new { e.PostId, e.IsActual })
+            .IsUnique()
+            .HasFilter($"\"{nameof(Post.IsActual)}\" = TRUE");
+
+        modelBuilder.Entity<SaleTour>().HasKey(x => new { x.SaleId, x.TourId });
+
+        modelBuilder.Entity<TourSupplies>().HasKey(x => new { x.SuppliesId, x.TourId });
+
+        modelBuilder.Entity<TourAgency>().HasKey(x => new { x.AgencyId, x.TourId });
+
+        modelBuilder.Entity<Post>()
+           .Property(x => x.Configuration)
+           .HasColumnType("jsonb")
+           .HasConversion(
+           x => SerializePostConfiguration(x),
+           x => DeserialzePostConfiguration(x));
+    }
+
+    public DbSet<Client> Clients { get; set; }
+
+    public DbSet<Post> Posts { get; set; }
+
+    public DbSet<Tour> Tours { get; set; }
+
+    public DbSet<TourHistory> TourHistories { get; set; }
+
+    public DbSet<Salary> Salaries { get; set; }
+
+    public DbSet<Sale> Sales { get; set; }
+
+    public DbSet<SaleTour> SaleTours { get; set; }
+
+    public DbSet<Employee> Employees { get; set; }
+    public DbSet<Supplies> Supplieses { get; set; }
+    public DbSet<Agency> Agencies { get; set; }
+    public DbSet<TourSupplies> TourSupplieses { get; set; }
+    public DbSet<TourAgency> TourAgensies { get; set; }
+
+    private static string SerializePostConfiguration(PostConfiguration postConfiguration) => JsonConvert.SerializeObject(postConfiguration);
+    private static PostConfiguration DeserialzePostConfiguration(string jsonString) => JToken.Parse(jsonString).Value<string>("Type") switch
+    {
+        nameof(TravelAgentPostConfiguration) => JsonConvert.DeserializeObject<TravelAgentPostConfiguration>(jsonString)!,
+        nameof(ChiefPostConfiguration) => JsonConvert.DeserializeObject<ChiefPostConfiguration>(jsonString)!,
+        _ => JsonConvert.DeserializeObject<PostConfiguration>(jsonString)!,
+    };
+}