all done lab_6

SmallSoftwareProject/SmallSoftwareBusinessLogic/Implementations/ManufacturerBusinessLogicContract.cs

@@ -0,0 +1,68 @@
+using SmallSoftwareContracts.BusinessLogicsContracts;
+using SmallSoftwareContracts.DataModels;
+using SmallSoftwareContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using SmallSoftwareContracts.Exceptions;
+using SmallSoftwareContracts.Extensions;
+using System.Text.Json;
+
+namespace SmallSoftwareBusinessLogic.Implementations;
+
+internal class ManufacturerBusinessLogicContract(IManufacturerStorageContract
+manufacturerStorageContract, ILogger logger) : IManufacturerBusinessLogicContract
+{
+    private readonly ILogger _logger = logger;
+    private readonly IManufacturerStorageContract _manufacturerStorageContract
+    = manufacturerStorageContract;
+    public List<ManufacturerDataModel> GetAllManufacturers()
+    {
+        _logger.LogInformation("GetAllManufacturers");
+        return _manufacturerStorageContract.GetList() ?? throw new
+        NullListException();
+    }
+    public ManufacturerDataModel GetManufacturerByData(string data)
+    {
+        _logger.LogInformation("Get element by data: {data}", data);
+        if (data.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+        if (data.IsGuid())
+        {
+            return _manufacturerStorageContract.GetElementById(data) ??
+            throw new ElementNotFoundException(data);
+        }
+        return _manufacturerStorageContract.GetElementByName(data) ??
+        _manufacturerStorageContract.GetElementByOldName(data) ??
+        throw new ElementNotFoundException(data);
+    }
+    public void InsertManufacturer(ManufacturerDataModel manufacturerDataModel)
+    {
+        _logger.LogInformation("New data: {json}",
+        JsonSerializer.Serialize(manufacturerDataModel));
+        ArgumentNullException.ThrowIfNull(manufacturerDataModel);
+        manufacturerDataModel.Validate();
+        _manufacturerStorageContract.AddElement(manufacturerDataModel); 
+    }
+    public void UpdateManufacturer(ManufacturerDataModel manufacturerDataModel)
+    {
+        _logger.LogInformation("Update data: {json}",
+        JsonSerializer.Serialize(manufacturerDataModel));
+        ArgumentNullException.ThrowIfNull(manufacturerDataModel);
+        manufacturerDataModel.Validate();
+        _manufacturerStorageContract.UpdElement(manufacturerDataModel);
+    }
+    public void DeleteManufacturer(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");
+        }
+        _manufacturerStorageContract.DelElement(id);
+    }
+}

SmallSoftwareProject/SmallSoftwareBusinessLogic/Implementations/PostBusinessLogicContract.cs

@@ -0,0 +1,100 @@
+using Microsoft.Extensions.Logging;
+using SmallSoftwareContracts.BusinessLogicsContracts;
+using SmallSoftwareContracts.DataModels;
+using SmallSoftwareContracts.Enums;
+using SmallSoftwareContracts.Exceptions;
+using SmallSoftwareContracts.Extensions;
+using SmallSoftwareContracts.StoragesContracts;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Text.Json;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareBusinessLogic.Implementations;
+
+internal 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);
+    }
+}
+

SmallSoftwareProject/SmallSoftwareBusinessLogic/Implementations/ReportContract.cs

@@ -0,0 +1,152 @@
+using Microsoft.Extensions.Logging;
+using SmallSoftwareBusinessLogic.OfficePackage;
+using SmallSoftwareContracts.BusinessLogicsContracts;
+using SmallSoftwareContracts.DataModels;
+using SmallSoftwareContracts.Exceptions;
+using SmallSoftwareContracts.Extensions;
+using SmallSoftwareContracts.StoragesContracts;
+
+namespace SmallSoftwareBusinessLogic.Implementations;
+
+internal class ReportContract(ISoftwareStorageContract softwareStorageContract,
+                              IRequestStorageContract requestStorageContract,
+                              ISalaryStorageContract salaryStorageContract, 
+                              BaseWordBuilder baseWordBuilder, 
+                              BaseExcelBuilder baseExcelBuilder,
+                              BasePdfBuilder basePdfBuilder, ILogger logger) : IReportContract
+{
+    private readonly ISoftwareStorageContract _softwareStorageContract = softwareStorageContract;
+    private readonly ILogger _logger = logger;
+    private readonly IRequestStorageContract _requestStorageContract = requestStorageContract;
+    private readonly ISalaryStorageContract _salaryStorageContract = salaryStorageContract;
+    private readonly BaseWordBuilder _baseWordBuilder = baseWordBuilder;
+    private readonly BaseExcelBuilder _baseExcelBuilder = baseExcelBuilder;
+
+    private readonly BasePdfBuilder _basePdfBuilder = basePdfBuilder;
+
+    internal static readonly string[] tableHeader = ["Дата", "Сумма", "Товар", "Кол-во"];
+    internal static readonly string[] documentHeader = ["Название ПО", "Старая цена", "Дата"];
+
+    public Task<List<HistoryOfSoftwareDataModel>> GetDataSoftwaresByHistoryAsync(CancellationToken ct)
+    {
+        _logger.LogInformation("Get data SoftwaresByManufacturer");
+        return GetDataBySoftwaresAsync(ct);
+    }
+    private async Task<List<HistoryOfSoftwareDataModel>> GetDataBySoftwaresAsync(CancellationToken ct) 
+        => [.. (await _softwareStorageContract.GetListAsync(ct)).GroupBy(x => x.SoftwareName).Select(x => new HistoryOfSoftwareDataModel {
+            SoftwareName = x.Key, Histories = [.. x.Select(y => y.OldPrice.ToString())], Data = [.. x.Select(y => y.ChangeDate.ToString())] })];
+
+
+    public async Task<Stream> CreateDocumentSoftwaresByHistoryAsync(CancellationToken ct)
+    {
+        _logger.LogInformation("Create report HistoryBySoftware");
+        var data = await GetDataBySoftwaresAsync(ct) ?? throw new InvalidOperationException("No found data");
+
+        var tableData = new List<string[]>
+        {
+            documentHeader
+        };
+
+        foreach (var software in data)
+        {
+            tableData.Add(new string[] { software.SoftwareName, "", "" });
+
+            var pairs = software.Histories.Zip(software.Data,
+                (price, date) => new string[] { "", price, date });
+
+            tableData.AddRange(pairs);
+        }
+
+        return _baseWordBuilder
+            .AddHeader("Истории ПО")
+            .AddParagraph($"Сформировано на дату {DateTime.Now}")
+            .AddTable(
+                widths: new[] { 3000, 3000, 3000 },
+                data: tableData
+            )
+            .Build();
+    }
+
+    public Task<List<RequestDataModel>> GetDataRequestByPeriodAsync(DateTime dateStart, DateTime dateFinish, CancellationToken ct)
+    {
+        _logger.LogInformation("Get data RequestsByPeriod from {dateStart} to {dateFinish}", dateStart, dateFinish);
+        return GetDataByRequestsAsync(dateStart, dateFinish, ct);
+    }
+
+    private async Task<List<RequestDataModel>> GetDataByRequestsAsync(DateTime dateStart, DateTime dateFinish, CancellationToken ct)
+    {
+        if (dateStart.IsDateNotOlder(dateFinish))
+        {
+            throw new IncorrectDatesException(dateStart, dateFinish);
+        } 
+        return [.. (await _requestStorageContract.GetListAsync(dateStart, dateFinish, ct)).OrderBy(x => x.RequestDate)];
+    }
+
+    public async Task<Stream> CreateDocumentRequestsByPeriodAsync(DateTime dateStart, DateTime dateFinish, CancellationToken ct)
+    {
+        logger.LogInformation("Create report RequestsByPeriod from {dateStart} to {dateFinish}", dateStart, dateFinish);
+        var data = await GetDataByRequestsAsync(dateStart, dateFinish, ct) ?? throw new InvalidOperationException("No found data");
+
+        var tableHeader = new string[] { "Дата", "Email", "Сумма", "ПО", "Количество" };
+
+        return _baseExcelBuilder
+            .AddHeader("Requests за период", 0, 5)
+            .AddParagraph($"c {dateStart.ToShortDateString()} по {dateFinish.ToShortDateString()}", 2)
+            .AddTable(
+                [10, 10, 10, 10, 10],
+                [.. new List<string[]>() { tableHeader }
+                .Union(data.SelectMany(x =>
+                    (new List<string[]>() {
+                        new string[] {
+                            x.RequestDate.ToShortDateString(),
+                            x.Email,
+                            x.Sum.ToString("N2"),
+                            "",
+                            ""
+                        }
+                    })
+                    .Union(x.Softwares!.Select(y => new string[] {
+                        "",
+                        "",
+                        "",
+                        y.SoftwareName,
+                        y.Count.ToString("N2")
+                    }))
+                    .ToArray()
+                )
+                .Union([[
+                    "Всего",
+                    "",
+                    data.Sum(x => x.Sum).ToString("N2"),
+                    "",
+                    ""
+                ]]))
+            ])
+            .Build();
+    }
+
+    public Task<List<WorkerSalaryByPeriodDataModel>> GetDataSalaryByPeriodAsync(DateTime dateStart, DateTime dateFinish, CancellationToken ct)
+    {
+        logger.LogInformation("Get data SalaryByPeriod from {dateStart} to { dateFinish}", dateStart, dateFinish);
+        return GetDataBySalaryAsync(dateStart, dateFinish, ct);
+    }
+
+    private async Task<List<WorkerSalaryByPeriodDataModel>> GetDataBySalaryAsync(DateTime dateStart, DateTime dateFinish, CancellationToken ct)
+    {
+        if (dateStart.IsDateNotOlder(dateFinish))
+        {
+            throw new IncorrectDatesException(dateStart, dateFinish);
+        }
+        return [.. (await _salaryStorageContract.GetListAsync(dateStart, dateFinish, ct)).GroupBy(x => x.WorkerFIO).Select(x => new
+        WorkerSalaryByPeriodDataModel { WorkerFIO = x.Key, TotalSalary = x.Sum(y => y.Salary),
+            FromPeriod = x.Min(y => y.SalaryDate), ToPeriod = x.Max(y => y.SalaryDate) }).OrderBy(x => x.WorkerFIO)];
+    }
+
+    public async Task<Stream> CreateDocumentSalaryByPeriodAsync(DateTime dateStart, DateTime dateFinish, CancellationToken ct)
+    {
+        _logger.LogInformation("Create report SalaryByPeriod from {dateStart}  to { dateFinish}", dateStart, dateFinish);
+        var data = await GetDataBySalaryAsync(dateStart, dateFinish, ct) ?? throw new InvalidOperationException("No found data");
+        return _basePdfBuilder.AddHeader("Зарплатная ведомость").AddParagraph($"за период с {dateStart.ToShortDateString()} по {dateFinish.ToShortDateString()}")
+            .AddPieChart("Начисления", [.. data.Select(x => (x.WorkerFIO, x.TotalSalary))]).Build();
+    }
+}

SmallSoftwareProject/SmallSoftwareBusinessLogic/Implementations/RequestBusinessLogicContract.cs

@@ -0,0 +1,108 @@
+using Microsoft.Extensions.Logging;
+using SmallSoftwareContracts.BusinessLogicsContracts;
+using SmallSoftwareContracts.DataModels;
+using SmallSoftwareContracts.Exceptions;
+using SmallSoftwareContracts.Extensions;
+using SmallSoftwareContracts.StoragesContracts;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Text.Json;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareBusinessLogic.Implementations;
+
+internal class RequestBusinessLogicContract(IRequestStorageContract requestStorageContract, ILogger logger) : IRequestBusinessLogicContract
+{
+    private readonly ILogger _logger = logger;
+    private readonly IRequestStorageContract _requestStorageContract =
+    requestStorageContract;
+    public List<RequestDataModel> GetAllRequestsByPeriod(DateTime fromDate, DateTime toDate)
+    {
+        _logger.LogInformation("GetAllRequests params: {fromDate}, {toDate}", fromDate, toDate);
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        return _requestStorageContract.GetList(fromDate, toDate) ?? throw new NullListException();
+
+    }
+    public List<RequestDataModel> GetAllRequestsByWorkerByPeriod(string workerId, DateTime fromDate, DateTime toDate)
+    {
+        _logger.LogInformation("GetAllRequests params: {workerId}, {fromDate}, { toDate} ", workerId, fromDate, toDate);
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        if (workerId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(workerId));
+        }
+        if (!workerId.IsGuid())
+        {
+            throw new ValidationException("The value in the field workerId is not a unique identifier.");
+        }
+        return _requestStorageContract.GetList(fromDate, toDate, workerId:
+        workerId) ?? throw new NullListException();
+    }
+
+    public List<RequestDataModel> GetAllRequestsBySoftwareByPeriod(string softwareId, DateTime fromDate, DateTime toDate)
+    {
+        _logger.LogInformation("GetAllRequests params: {softwareId}, {fromDate}, { toDate} ", softwareId, fromDate, toDate);
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        if (softwareId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(softwareId));
+        }
+        if (!softwareId.IsGuid())
+        {
+            throw new ValidationException("The value in the field  softwareId is not a unique identifier.");
+        }
+        return _requestStorageContract.GetList(fromDate, toDate, softwareId:
+        softwareId) ?? throw new NullListException();
+    }
+
+    public RequestDataModel GetRequestByData(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 _requestStorageContract.GetElementById(data) ?? throw new ElementNotFoundException(data);
+
+    }
+    public void InsertRequest(RequestDataModel requestDataModel)
+    {
+        _logger.LogInformation("New data: {json}",
+    JsonSerializer.Serialize(requestDataModel));
+        ArgumentNullException.ThrowIfNull(requestDataModel);
+        requestDataModel.Validate();
+        _requestStorageContract.AddElement(requestDataModel);
+
+    }
+    public void CancelRequest(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");
+        }
+        _requestStorageContract.DelElement(id);
+
+    }
+
+
+}

SmallSoftwareProject/SmallSoftwareBusinessLogic/Implementations/SalaryBusinessLogicContract.cs

@@ -0,0 +1,144 @@
+using Microsoft.Extensions.Logging;
+using SmallSoftwareContracts.BusinessLogicsContracts;
+using SmallSoftwareContracts.DataModels;
+using SmallSoftwareContracts.Exceptions;
+using SmallSoftwareContracts.Extensions;
+using SmallSoftwareContracts.Infrastructure;
+using SmallSoftwareContracts.Infrastructure.PostConfigurations;
+using SmallSoftwareContracts.StoragesContracts;
+namespace SmallSoftwareBusinessLogic.Implementations;
+
+
+internal class SalaryBusinessLogicContract(ISalaryStorageContract salaryStorageContract,
+    IRequestStorageContract requestStorageContract, IPostStorageContract postStorageContract, 
+    IWorkerStorageContract workerStorageContract, ILogger logger, IConfigurationSalary сonfiguration) : ISalaryBusinessLogicContract
+{
+    private readonly ILogger _logger = logger;
+    private readonly ISalaryStorageContract _salaryStorageContract = salaryStorageContract;
+    private readonly IRequestStorageContract _requestStorageContract = requestStorageContract;
+    private readonly IPostStorageContract _postStorageContract = postStorageContract;
+    private readonly IWorkerStorageContract _workerStorageContract = workerStorageContract;
+    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> GetAllSalariesByPeriodByWorker(DateTime
+    fromDate, DateTime toDate, string workerId)
+    {
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        if (workerId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(workerId));
+        }
+        if (!workerId.IsGuid())
+        {
+            throw new ValidationException("The value in the field workerId is not a unique identifier.");
+        }
+        _logger.LogInformation("GetAllSalaries params: {fromDate}, {toDate}, { workerId} ", fromDate, toDate, workerId);
+        return _salaryStorageContract.GetList(fromDate, toDate, workerId) ??
+        throw new NullListException();
+    }
+
+
+    public void CalculateSalaryByMonth(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 workers = _workerStorageContract.GetList() ?? throw new NullListException();
+        foreach (var worker in workers)
+        {
+            var requests = _requestStorageContract.GetList(startDate, finishDate, workerId: worker.Id) ?? throw new NullListException();
+            var post = _postStorageContract.GetElementById(worker.PostId) ??
+                throw new NullListException();
+            var salary = worker.ConfigurationModel switch
+            {
+                null => 0,
+                CashierPostConfiguration cpc => CalculateSalaryForCashier(requests, startDate, finishDate, cpc),
+                SupervisorPostConfiguration spc => CalculateSalaryForSupervisor(startDate, finishDate, spc),
+                PostConfiguration pc => pc.Rate,
+            };
+            _logger.LogDebug("The employee {workerId} was paid a salary of {salary}", worker.Id, salary);
+            _salaryStorageContract.AddElement(new SalaryDataModel(worker.Id, finishDate, salary));
+        }
+    }
+    private double CalculateSalaryForCashier(List<RequestDataModel> requests, DateTime startDate, DateTime finishDate, CashierPostConfiguration config)
+    {
+        var parallelOptions = new ParallelOptions
+        {
+            MaxDegreeOfParallelism = _salaryConfiguration.MaxConcurrentThreads
+        };
+
+        double calcPercent = 0.0;
+        var dates = new List<DateTime>();
+
+        for (var date = startDate; date < finishDate; date = date.AddDays(1))
+        {
+            dates.Add(date);
+        }
+
+        Parallel.ForEach(dates, parallelOptions, date =>
+        {
+            var requestsInDay = requests.Where(x => x.RequestDate >= date && x.RequestDate < date.AddDays(1)).ToArray();
+            if (requestsInDay.Length > 0)
+            {
+                double dailySum = requestsInDay.Sum(x => x.Sum);
+                double dailyAverage = dailySum / requestsInDay.Length;
+                double dailyPercent = dailyAverage * config.SalePercent;
+
+                lock (_lockObject)
+                {
+                    calcPercent += dailyPercent;
+                }
+            }
+        });
+
+        double bonus = 0;
+        try
+        {
+            bonus = requests
+                .AsParallel()
+                .WithDegreeOfParallelism(_salaryConfiguration.MaxConcurrentThreads)
+                .Where(x => x.Sum > _salaryConfiguration.ExtraSaleSum)
+                .Sum(x => x.Sum * config.BonusForExtraSales);
+        }
+        catch (AggregateException agEx)
+        {
+            foreach (var ex in agEx.InnerExceptions)
+            {
+                _logger.LogError(ex, "Error calculating bonus in cashier payroll");
+            }
+            return 0;
+        }
+
+        return config.Rate + calcPercent + bonus;
+    }
+
+    private double CalculateSalaryForSupervisor(DateTime startDate, DateTime finishDate, SupervisorPostConfiguration config)
+    {
+        try
+        {
+            return config.Rate + config.PersonalCountTrendPremium *
+            _workerStorageContract.GetWorkerTrend(startDate, finishDate);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Error in the supervisor payroll process");
+            return 0;
+        }
+    }
+}
+

SmallSoftwareProject/SmallSoftwareBusinessLogic/Implementations/SoftwareBusinessLogicContract.cs

@@ -0,0 +1,100 @@
+using Microsoft.Extensions.Logging;
+using SmallSoftwareContracts.BusinessLogicsContracts;
+using SmallSoftwareContracts.DataModels;
+using SmallSoftwareContracts.Enums;
+using SmallSoftwareContracts.Exceptions;
+using SmallSoftwareContracts.Extensions;
+using SmallSoftwareContracts.StoragesContracts;
+using System.Text.Json;
+
+namespace SmallSoftwareBusinessLogic.Implementations;
+
+internal class SoftwareBusinessLogicContract(ISoftwareStorageContract
+softwareStorageContract, ILogger logger) : ISoftwareBusinessLogicContract
+{
+    private readonly ILogger _logger = logger;
+    private readonly ISoftwareStorageContract _softwareStorageContract =
+    softwareStorageContract;
+    public List<SoftwareDataModel> GetAllSoftwares(bool onlyActive)
+    {
+    _logger.LogInformation("GetAllSoftwares params: {onlyActive}", onlyActive);
+    return _softwareStorageContract.GetList(onlyActive) ?? throw new
+    NullListException(); 
+    }
+    public List<SoftwareDataModel> GetAllSoftwaresByManufacturer(string
+    manufacturerId, bool onlyActive = true)
+    {
+    if (manufacturerId.IsEmpty())
+    {
+        throw new ArgumentNullException(nameof(manufacturerId));
+    }
+    if (!manufacturerId.IsGuid())
+    {
+        throw new ValidationException("The value in the field manufacturerId is not a unique identifier.");
+    }
+    _logger.LogInformation("GetAllSoftwares params: {manufacturerId}, { onlyActive} ", manufacturerId, onlyActive);
+    return _softwareStorageContract.GetList(onlyActive, manufacturerId) ??
+    throw new NullListException();
+    }
+    public List<SoftwareHistoryDataModel> GetSoftwareHistoryBySoftware(string softwareId)
+    {
+    _logger.LogInformation("GetSoftwareHistoryBySoftware for {softwareId}",  softwareId);
+        if (softwareId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(softwareId));
+        }
+        if (!softwareId.IsGuid())
+        {
+            throw new ValidationException("The value in the field softwareId is not a unique identifier."); 
+        }
+        return _softwareStorageContract.GetHistoryBySoftwareId(softwareId) ??
+        throw new NullListException();
+
+    }
+    public SoftwareDataModel GetSoftwareByData(string data)
+    {
+        _logger.LogInformation("Get element by data: {data}", data);
+        if (data.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+        if (data.IsGuid())
+        {
+            return _softwareStorageContract.GetElementById(data) ?? throw
+            new ElementNotFoundException(data);
+        }
+        return _softwareStorageContract.GetElementByName(data) ?? throw new
+        ElementNotFoundException(data);
+    }
+    public void InsertSoftware(SoftwareDataModel softwareDataModel)
+    { 
+        _logger.LogInformation("New data: {json}",
+        JsonSerializer.Serialize(softwareDataModel));
+        ArgumentNullException.ThrowIfNull(softwareDataModel);
+        softwareDataModel.Validate();
+        _softwareStorageContract.AddElement(softwareDataModel); 
+    }
+    public void UpdateSoftware(SoftwareDataModel softwareDataModel)
+    {
+        _logger.LogInformation("Update data: {json}",
+        JsonSerializer.Serialize(softwareDataModel));
+        ArgumentNullException.ThrowIfNull(softwareDataModel);
+        softwareDataModel.Validate();
+        _softwareStorageContract.UpdElement(softwareDataModel);
+
+    }
+    public void DeleteSoftware(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");
+        }
+        _softwareStorageContract.DelElement(id);
+    }
+}
+

SmallSoftwareProject/SmallSoftwareBusinessLogic/Implementations/WorkerBusinessLogicContract.cs

@@ -0,0 +1,110 @@
+using Microsoft.Extensions.Logging;
+using SmallSoftwareContracts.BusinessLogicsContracts;
+using SmallSoftwareContracts.DataModels;
+using SmallSoftwareContracts.Exceptions;
+using SmallSoftwareContracts.Extensions;
+using SmallSoftwareContracts.StoragesContracts;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Text.Json;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareBusinessLogic.Implementations;
+
+internal class WorkerBusinessLogicContract(IWorkerStorageContract
+workerStorageContract, ILogger logger) : IWorkerBusinessLogicContract
+{
+    private readonly ILogger _logger = logger;
+    private readonly IWorkerStorageContract _workerStorageContract =
+    workerStorageContract;
+    public List<WorkerDataModel> GetAllWorkers(bool onlyActive = true)
+    {
+        _logger.LogInformation("GetAllWorkers params: {onlyActive}",
+        onlyActive);
+        return _workerStorageContract.GetList(onlyActive) ?? throw new
+        NullListException();
+    }
+    public List<WorkerDataModel> GetAllWorkersByPost(string postId, bool
+    onlyActive = true)
+    {
+        _logger.LogInformation("GetAllWorkers 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 _workerStorageContract.GetList(onlyActive, postId) ?? throw
+    new NullListException();
+    }
+    public List<WorkerDataModel> GetAllWorkersByBirthDate(DateTime fromDate,
+    DateTime toDate, bool onlyActive = true)
+    {
+        _logger.LogInformation("GetAllWorkers params: {onlyActive},  { fromDate}, { toDate} ", onlyActive, fromDate, toDate);
+    if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        return _workerStorageContract.GetList(onlyActive, fromBirthDate:
+        fromDate, toBirthDate: toDate) ?? throw new NullListException();
+    }
+    public List<WorkerDataModel> GetAllWorkersByEmploymentDate(DateTime
+    fromDate, DateTime toDate, bool onlyActive = true)
+    {
+        _logger.LogInformation("GetAllWorkers params: {onlyActive}, { fromDate}, { toDate} ", onlyActive, fromDate, toDate);
+    if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        return _workerStorageContract.GetList(onlyActive, fromEmploymentDate:
+        fromDate, toEmploymentDate: toDate) ?? throw new NullListException();
+    }
+    public WorkerDataModel GetWorkerByData(string data)
+    {
+        _logger.LogInformation("Get element by data: {data}", data);
+        if (data.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+        if (data.IsGuid())
+        {
+            return _workerStorageContract.GetElementById(data) ?? throw
+            new ElementNotFoundException(data);
+        }
+        return _workerStorageContract.GetElementByFIO(data) ?? throw new
+        ElementNotFoundException(data);
+    }
+    public void InsertWorker(WorkerDataModel workerDataModel)
+    {
+        _logger.LogInformation("New data: {json}",
+        JsonSerializer.Serialize(workerDataModel));
+        ArgumentNullException.ThrowIfNull(workerDataModel);
+        workerDataModel.Validate();
+        _workerStorageContract.AddElement(workerDataModel);
+    }
+    public void UpdateWorker(WorkerDataModel workerDataModel)
+    {
+        _logger.LogInformation("Update data: {json}",
+        JsonSerializer.Serialize(workerDataModel));
+        ArgumentNullException.ThrowIfNull(workerDataModel);
+        workerDataModel.Validate();
+        _workerStorageContract.UpdElement(workerDataModel);
+    } 
+public void DeleteWorker(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");
+        }
+        _workerStorageContract.DelElement(id);
+    }
+}

SmallSoftwareProject/SmallSoftwareBusinessLogic/OfficePackage/BaseExcelBuilder.cs

@@ -0,0 +1,9 @@
+namespace SmallSoftwareBusinessLogic.OfficePackage;
+
+public abstract class BaseExcelBuilder
+{
+    public abstract BaseExcelBuilder AddHeader(string header, int startIndex, int count);
+    public abstract BaseExcelBuilder AddParagraph(string text, int columnIndex);
+    public abstract BaseExcelBuilder AddTable(int[] columnsWidths, List<string[]> data);
+    public abstract Stream Build();
+}

SmallSoftwareProject/SmallSoftwareBusinessLogic/OfficePackage/BasePdfBuilder.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareBusinessLogic.OfficePackage;
+
+public abstract class BasePdfBuilder
+{
+    public abstract BasePdfBuilder AddHeader(string header);
+    public abstract BasePdfBuilder AddParagraph(string text);
+    public abstract BasePdfBuilder AddPieChart(string title, List<(string Caption, double Value)> data);
+    public abstract Stream Build();
+}

SmallSoftwareProject/SmallSoftwareBusinessLogic/OfficePackage/BaseWordBuilder.cs

@@ -0,0 +1,9 @@
+namespace SmallSoftwareBusinessLogic.OfficePackage;
+public abstract class BaseWordBuilder
+{
+    public abstract BaseWordBuilder AddHeader(string header);
+    public abstract BaseWordBuilder AddParagraph(string text);
+    public abstract BaseWordBuilder AddTable(int[] widths, List<string[]>
+    data);
+    public abstract Stream Build();
+}

SmallSoftwareProject/SmallSoftwareBusinessLogic/OfficePackage/MigraDocPdfBuilder.cs

@@ -0,0 +1,76 @@
+using MigraDoc.DocumentObjectModel;
+using MigraDoc.DocumentObjectModel.Shapes.Charts;
+using MigraDoc.Rendering;
+using System.Text;
+
+namespace SmallSoftwareBusinessLogic.OfficePackage;
+
+
+public class MigraDocPdfBuilder : BasePdfBuilder
+{
+    private readonly Document _document;
+
+    public MigraDocPdfBuilder()
+    {
+        Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
+        _document = new Document();
+        DefineStyles();
+    }
+
+    public override BasePdfBuilder AddHeader(string header)
+    {
+        _document.AddSection().AddParagraph(header, "NormalBold");
+        return this;
+    }
+
+    public override BasePdfBuilder AddParagraph(string text)
+    {
+        _document.LastSection.AddParagraph(text, "Normal");
+        return this;
+    }
+
+    public override BasePdfBuilder AddPieChart(string title, List<(string Caption, double Value)> data)
+    {
+        if (data == null || data.Count == 0)
+        {
+            return this;
+        }
+        var chart = new Chart(ChartType.Pie2D);
+        var series = chart.SeriesCollection.AddSeries();
+        series.Add(data.Select(x => x.Value).ToArray());
+        var xseries = chart.XValues.AddXSeries();
+        xseries.Add(data.Select(x => x.Caption).ToArray());
+        chart.DataLabel.Type = DataLabelType.Percent;
+        chart.DataLabel.Position = DataLabelPosition.OutsideEnd;
+        chart.Width = Unit.FromCentimeter(16);
+        chart.Height = Unit.FromCentimeter(12);
+        chart.TopArea.AddParagraph(title);
+        chart.XAxis.MajorTickMark = TickMarkType.Outside;
+        chart.YAxis.MajorTickMark = TickMarkType.Outside;
+        chart.YAxis.HasMajorGridlines = true;
+        chart.PlotArea.LineFormat.Width = 1;
+        chart.PlotArea.LineFormat.Visible = true;
+        chart.TopArea.AddLegend();
+        _document.LastSection.Add(chart);
+        return this;
+    }
+
+    public override Stream Build()
+    {
+        var stream = new MemoryStream();
+        var renderer = new PdfDocumentRenderer(true)
+        {
+            Document = _document
+        };
+        renderer.RenderDocument();
+        renderer.PdfDocument.Save(stream);
+        return stream;
+    }
+
+    private void DefineStyles()
+    {
+        var headerStyle = _document.Styles.AddStyle("NormalBold", "Normal");
+        headerStyle.Font.Bold = true;
+        headerStyle.Font.Size = 14;
+    }
+}

SmallSoftwareProject/SmallSoftwareBusinessLogic/OfficePackage/OpenXmlExcelBuilder.cs

@@ -0,0 +1,308 @@
+using DocumentFormat.OpenXml.Packaging;
+using DocumentFormat.OpenXml.Spreadsheet;
+using DocumentFormat.OpenXml;
+
+namespace SmallSoftwareBusinessLogic.OfficePackage;
+
+public class OpenXmlExcelBuilder : BaseExcelBuilder
+{
+    private readonly SheetData _sheetData;
+    private readonly MergeCells _mergeCells;
+    private readonly Columns _columns;
+    private uint _rowIndex = 0;
+
+    public OpenXmlExcelBuilder()
+    {
+        _sheetData = new SheetData();
+        _mergeCells = new MergeCells();
+        _columns = new Columns();
+        _rowIndex = 1;
+    }
+
+    public override BaseExcelBuilder AddHeader(string header, int startIndex, int count)
+    {
+        CreateCell(startIndex, _rowIndex, header, StyleIndex.BoldTextWithBorders);
+        for (int i = startIndex + 1; i < startIndex + count; ++i)
+        {
+            CreateCell(i, _rowIndex, "", StyleIndex.BoldTextWithBorders);
+        }
+        _mergeCells.Append(new MergeCell()
+        {
+            Reference = new StringValue($"{GetExcelColumnName(startIndex)}{_rowIndex}:{GetExcelColumnName(startIndex + count - 1)}{_rowIndex}")
+        });
+        _rowIndex++;
+        return this;
+    }
+
+    public override BaseExcelBuilder AddParagraph(string text, int columnIndex)
+    {
+        CreateCell(columnIndex, _rowIndex++, text, StyleIndex.SimpleTextWithoutBorder);
+        return this;
+    }
+
+    public override BaseExcelBuilder AddTable(int[] columnsWidths, List<string[]> data)
+    {
+        if (columnsWidths == null || columnsWidths.Length == 0)
+        {
+            throw new ArgumentNullException(nameof(columnsWidths));
+        }
+        if (data == null || data.Count == 0)
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+        if (data.Any(x => x.Length != columnsWidths.Length))
+        {
+            throw new InvalidOperationException("widths.Length != data.Length");
+        }
+
+        uint counter = 1;
+        int coef = 2;
+        _columns.Append(columnsWidths.Select(x => new Column
+        {
+            Min = counter,
+            Max = counter++,
+            Width = x * coef,
+            CustomWidth = true
+        }));
+
+        for (var j = 0; j < data.First().Length; ++j)
+        {
+            CreateCell(j, _rowIndex, data.First()[j], StyleIndex.BoldTextWithBorders);
+        }
+        _rowIndex++;
+
+        for (var i = 1; i < data.Count - 1; ++i)
+        {
+            for (var j = 0; j < data[i].Length; ++j)
+            {
+                CreateCell(j, _rowIndex, data[i][j], StyleIndex.SimpleTextWithBorders);
+            }
+            _rowIndex++;
+        }
+
+        for (var j = 0; j < data.Last().Length; ++j)
+        {
+            CreateCell(j, _rowIndex, data.Last()[j], StyleIndex.BoldTextWithBorders);
+        }
+        _rowIndex++;
+
+        return this;
+    }
+
+    public override Stream Build()
+    {
+        var stream = new MemoryStream();
+        using var spreadsheetDocument = SpreadsheetDocument.Create(stream,
+        SpreadsheetDocumentType.Workbook);
+        var workbookpart = spreadsheetDocument.AddWorkbookPart();
+        GenerateStyle(workbookpart);
+        workbookpart.Workbook = new Workbook();
+        var worksheetPart = workbookpart.AddNewPart<WorksheetPart>();
+        worksheetPart.Worksheet = new Worksheet();
+        if (_columns.HasChildren)
+        {
+            worksheetPart.Worksheet.Append(_columns);
+        }
+        worksheetPart.Worksheet.Append(_sheetData);
+        var sheets =
+        spreadsheetDocument.WorkbookPart!.Workbook.AppendChild(new Sheets());
+        var sheet = new Sheet()
+        {
+            Id =
+        spreadsheetDocument.WorkbookPart.GetIdOfPart(worksheetPart),
+            SheetId = 1,
+            Name = "Лист 1"
+        };
+        sheets.Append(sheet);
+        if (_mergeCells.HasChildren)
+        {
+            worksheetPart.Worksheet.InsertAfter(_mergeCells,
+            worksheetPart.Worksheet.Elements<SheetData>().First());
+        }
+        return stream;
+    }
+
+    private static void GenerateStyle(WorkbookPart workbookPart)
+    {
+        var workbookStylesPart = workbookPart.AddNewPart<WorkbookStylesPart>();
+        workbookStylesPart.Stylesheet = new Stylesheet();
+
+        var fonts = new Fonts()
+        {
+            Count = 2,
+            KnownFonts = BooleanValue.FromBoolean(true)
+        };
+        fonts.Append(new DocumentFormat.OpenXml.Spreadsheet.Font
+        {
+            FontSize = new FontSize() { Val = 11 },
+            FontName = new FontName() { Val = "Calibri" },
+            FontFamilyNumbering = new FontFamilyNumbering() { Val = 2 },
+            FontScheme = new FontScheme()
+            {
+                Val = new EnumValue<FontSchemeValues>(FontSchemeValues.Minor)
+            }
+        });
+        fonts.Append(new DocumentFormat.OpenXml.Spreadsheet.Font
+        {
+            FontSize = new FontSize() { Val = 11 },
+            FontName = new FontName() { Val = "Calibri" },
+            FontFamilyNumbering = new FontFamilyNumbering() { Val = 2 },
+            FontScheme = new FontScheme()
+            {
+                Val = new EnumValue<FontSchemeValues>(FontSchemeValues.Minor)
+            },
+            Bold = new Bold()
+        });
+
+        workbookStylesPart.Stylesheet.Append(fonts);
+
+        var fills = new Fills() { Count = 1 };
+        fills.Append(new Fill
+        {
+            PatternFill = new PatternFill()
+            {
+                PatternType = new EnumValue<PatternValues>(PatternValues.None)
+            }
+        });
+        workbookStylesPart.Stylesheet.Append(fills);
+
+        var borders = new Borders() { Count = 2 };
+        borders.Append(new Border
+        {
+            LeftBorder = new LeftBorder(),
+            RightBorder = new RightBorder(),
+            TopBorder = new TopBorder(),
+            BottomBorder = new BottomBorder(),
+            DiagonalBorder = new DiagonalBorder()
+        });
+        borders.Append(new Border
+        {
+            LeftBorder = new LeftBorder() { Style = BorderStyleValues.Thin },
+            RightBorder = new RightBorder() { Style = BorderStyleValues.Thin },
+            TopBorder = new TopBorder() { Style = BorderStyleValues.Thin },
+            BottomBorder = new BottomBorder() { Style = BorderStyleValues.Thin },
+            DiagonalBorder = new DiagonalBorder()
+        });
+        workbookStylesPart.Stylesheet.Append(borders);
+        var cellFormats = new CellFormats() { Count = 4 };
+        cellFormats.Append(new CellFormat
+        {
+            NumberFormatId = 0,
+            FormatId = 0,
+            FontId = 0,
+            BorderId = 0,
+            FillId = 0,
+            Alignment = new Alignment()
+            {
+                Horizontal = HorizontalAlignmentValues.Left,
+                Vertical = VerticalAlignmentValues.Center,
+                WrapText = true
+            }
+        });
+        cellFormats.Append(new CellFormat
+        {
+            NumberFormatId = 0,
+            FormatId = 0,
+            FontId = 0,
+            BorderId = 1,
+            FillId = 0,
+            Alignment = new Alignment()
+            {
+                Horizontal = HorizontalAlignmentValues.Left,
+                Vertical = VerticalAlignmentValues.Center,
+                WrapText = true
+            }
+        });
+        cellFormats.Append(new CellFormat
+        {
+            NumberFormatId = 0,
+            FormatId = 0,
+            FontId = 1,
+            BorderId = 0,
+            FillId = 0,
+            Alignment = new Alignment()
+            {
+                Horizontal = HorizontalAlignmentValues.Left,
+                Vertical = VerticalAlignmentValues.Center,
+                WrapText = true
+            }
+        });
+        cellFormats.Append(new CellFormat
+        {
+            NumberFormatId = 0,
+            FormatId = 0,
+            FontId = 1,
+            BorderId = 1,
+            FillId = 0,
+            Alignment = new Alignment()
+            {
+                Horizontal = HorizontalAlignmentValues.Left,
+                Vertical = VerticalAlignmentValues.Center,
+                WrapText = true
+            }
+        });
+        workbookStylesPart.Stylesheet.Append(cellFormats);
+    }
+
+    private enum StyleIndex
+    {
+        SimpleTextWithoutBorder = 0,
+        SimpleTextWithBorders = 1,
+        BoldTextWithoutBorders = 2,
+        BoldTextWithBorders = 3
+    }
+
+    private void CreateCell(int columnIndex, uint rowIndex, string text, StyleIndex styleIndex)
+    {
+        var columnName = GetExcelColumnName(columnIndex);
+        var cellReference = columnName + rowIndex;
+        var row = _sheetData.Elements<Row>().FirstOrDefault(r => r.RowIndex == rowIndex);
+        if (row == null)
+        {
+            row = new Row() { RowIndex = rowIndex };
+            _sheetData.Append(row);
+        }
+
+        var newCell = row.Elements<Cell>()
+            .FirstOrDefault(c => c.CellReference != null && c.CellReference.Value == columnName + rowIndex);
+        if (newCell == null)
+        {
+            Cell? refCell = null;
+            foreach (Cell cell in row.Elements<Cell>())
+            {
+                if (cell.CellReference?.Value != null && cell.CellReference.Value.Length == cellReference.Length)
+                {
+                    if (string.Compare(cell.CellReference.Value, cellReference, true) > 0)
+                    {
+                        refCell = cell;
+                        break;
+                    }
+                }
+            }
+            newCell = new Cell() { CellReference = cellReference };
+            row.InsertBefore(newCell, refCell);
+        }
+
+        newCell.CellValue = new CellValue(text);
+        newCell.DataType = CellValues.String;
+        newCell.StyleIndex = (uint)styleIndex;
+    }
+
+    private static string GetExcelColumnName(int columnNumber)
+    {
+        columnNumber += 1;
+        int dividend = columnNumber;
+        string columnName = string.Empty;
+        int modulo;
+
+        while (dividend > 0)
+        {
+            modulo = (dividend - 1) % 26;
+            columnName = Convert.ToChar(65 + modulo).ToString() + columnName;
+            dividend = (dividend - modulo) / 26;
+        }
+
+        return columnName;
+    }
+}
+

SmallSoftwareProject/SmallSoftwareBusinessLogic/OfficePackage/OpenXmlWordBuilder.cs

@@ -0,0 +1,116 @@
+using DocumentFormat.OpenXml;
+using DocumentFormat.OpenXml.Packaging;
+using DocumentFormat.OpenXml.Wordprocessing;
+
+namespace SmallSoftwareBusinessLogic.OfficePackage;
+
+public class OpenXmlWordBuilder : BaseWordBuilder
+{
+    private readonly Document _document;
+    private readonly Body _body;
+
+    public OpenXmlWordBuilder()
+    {
+        ;
+        _document = new Document();
+        _body = _document.AppendChild(new Body());
+    }
+
+    public override BaseWordBuilder AddHeader(string header)
+    {
+        var paragraph = _body.AppendChild(new Paragraph());
+        var run = paragraph.AppendChild(new Run());
+
+        var runProperties = new RunProperties();
+        runProperties.AppendChild(new Bold());
+        run.AppendChild(runProperties);
+
+        run.AppendChild(new Text(header));
+        return this;
+    }
+
+    public override BaseWordBuilder AddParagraph(string text)
+    {
+        var paragraph = _body.AppendChild(new Paragraph());
+        var run = paragraph.AppendChild(new Run());
+        run.AppendChild(new Text(text));
+        return this;
+    }
+
+    public override BaseWordBuilder AddTable(int[] widths, List<string[]> data)
+    {
+        if (widths == null || widths.Length == 0)
+        {
+            throw new ArgumentNullException(nameof(widths));
+        }
+        if (data == null || data.Count == 0)
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+        if (data.Any(x => x.Length != widths.Length))
+        {
+            throw new InvalidOperationException("widths.Length != data.Length");
+        }
+        var table = new Table();
+        table.AppendChild(new TableProperties(
+        new TableBorders(
+        new TopBorder()
+        {
+            Val = new EnumValue<BorderValues>(BorderValues.Single),
+            Size = 12
+        },
+        new BottomBorder()
+        {
+            Val = new EnumValue<BorderValues>(BorderValues.Single),
+            Size = 12
+        },
+        new LeftBorder()
+        {
+            Val = new EnumValue<BorderValues>(BorderValues.Single),
+            Size = 12
+        },
+        new RightBorder()
+        {
+            Val = new EnumValue<BorderValues>(BorderValues.Single),
+            Size = 12
+        },
+        new InsideHorizontalBorder()
+        {
+            Val = new EnumValue<BorderValues>(BorderValues.Single),
+            Size = 12
+        },
+        new InsideVerticalBorder()
+        {
+            Val = new EnumValue<BorderValues>(BorderValues.Single),
+            Size = 12
+        }
+        )
+        ));
+        var tr = new TableRow();
+        for (var j = 0; j < widths.Length; ++j)
+        {
+            tr.Append(new TableCell(
+            new TableCellProperties(new TableCellWidth()
+            {
+                Width =
+            widths[j].ToString()
+            }),
+            new Paragraph(new Run(new RunProperties(new Bold()), new Text(data.First()[j])))));
+        }
+        table.Append(tr);
+        table.Append(data.Skip(1).Select(x =>
+        new TableRow(x.Select(y => new TableCell(new Paragraph(new
+        Run(new Text(y))))))));
+        _body.Append(table);
+        return this;
+    }
+
+    public override Stream Build()
+    {
+        var stream = new MemoryStream();
+        using var wordDocument = WordprocessingDocument.Create(stream, WordprocessingDocumentType.Document);
+        var mainPart = wordDocument.AddMainDocumentPart();
+        mainPart.Document = _document;
+        return stream;
+    }
+}

SmallSoftwareProject/SmallSoftwareBusinessLogic/SmallSoftwareBusinessLogic.csproj

@@ -0,0 +1,25 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="DocumentFormat.OpenXml" Version="3.3.0" />
+    <PackageReference Include="Microsoft.Extensions.Logging" Version="9.0.2" />
+    <PackageReference Include="PdfSharp.MigraDoc.Standard" Version="1.51.15" />
+  </ItemGroup>
+
+    <ItemGroup>
+	    <InternalsVisibleTo Include="SmallSoftwareTests" />
+		<InternalsVisibleTo Include="SmallSoftwareWebApi" />
+	    <InternalsVisibleTo Include="DynamicProxyGenAssembly2" />
+    </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\SmallSoftwareContracts\SmallSoftwareContracts.csproj" />
+  </ItemGroup>
+
+</Project>

SmallSoftwareProject/SmallSoftwareContracts/AdapterContracts/IManufacturerAdapter.cs

@@ -0,0 +1,18 @@
+using SmallSoftwareContracts.AdapterContracts.OperationResponses;
+using SmallSoftwareContracts.BindingModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareContracts.AdapterContracts;
+
+public interface IManufacturerAdapter
+{
+    ManufacturerOperationResponse GetList();
+    ManufacturerOperationResponse GetElement(string data);
+    ManufacturerOperationResponse RegisterManufacturer(ManufacturerBindingModel manufacturerModel);
+    ManufacturerOperationResponse ChangeManufacturerInfo(ManufacturerBindingModel manufacturerModel);
+    ManufacturerOperationResponse RemoveManufacturer(string id);
+}

SmallSoftwareProject/SmallSoftwareContracts/AdapterContracts/IPostAdapter.cs

@@ -0,0 +1,15 @@
+using SmallSoftwareContracts.AdapterContracts.OperationResponses;
+using SmallSoftwareContracts.BindingModels;
+
+namespace SmallSoftwareContracts.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);
+}

SmallSoftwareProject/SmallSoftwareContracts/AdapterContracts/IReportAdapter.cs

@@ -0,0 +1,13 @@
+using SmallSoftwareContracts.AdapterContracts.OperationResponses;
+
+namespace SmallSoftwareContracts.AdapterContracts;
+
+public interface IReportAdapter
+{
+    Task<ReportOperationResponse> GetDataSoftwaresByManufacturerAsync(CancellationToken ct);
+    Task<ReportOperationResponse> CreateDocumentSoftwaresByManufacturerAsync(CancellationToken ct);
+    Task<ReportOperationResponse> GetDataRequestByPeriodAsync(DateTime dateStart, DateTime dateFinish, CancellationToken ct);
+    Task<ReportOperationResponse> CreateDocumentRequestsByPeriodAsync(DateTime dateStart, DateTime dateFinish, CancellationToken ct);
+    Task<ReportOperationResponse> GetDataSalaryByPeriodAsync(DateTime dateStart, DateTime dateFinish, CancellationToken ct);
+    Task<ReportOperationResponse> CreateDocumentSalaryByPeriodAsync(DateTime dateStart, DateTime dateFinish, CancellationToken ct);
+}

SmallSoftwareProject/SmallSoftwareContracts/AdapterContracts/IRequestAdapter.cs

@@ -0,0 +1,22 @@
+using SmallSoftwareContracts.AdapterContracts.OperationResponses;
+using SmallSoftwareContracts.BindingModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareContracts.AdapterContracts;
+
+public interface IRequestAdapter
+{
+
+    RequestOperationResponse GetList(DateTime fromDate, DateTime toDate);
+    RequestOperationResponse GetWorkerList(string id, DateTime fromDate, DateTime
+    toDate);
+    RequestOperationResponse GetSoftwareList(string id, DateTime fromDate, DateTime
+    toDate);
+    RequestOperationResponse GetElement(string id);
+    RequestOperationResponse MakeRequest(RequestBindingModel saleModel);
+    RequestOperationResponse CancelRequest(string id);
+}

SmallSoftwareProject/SmallSoftwareContracts/AdapterContracts/ISalaryAdapter.cs

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

SmallSoftwareProject/SmallSoftwareContracts/AdapterContracts/ISoftwareAdapter.cs

@@ -0,0 +1,18 @@
+using SmallSoftwareContracts.AdapterContracts.OperationResponses;
+using SmallSoftwareContracts.BindingModels;
+
+namespace SmallSoftwareContracts.AdapterContracts;
+
+public interface ISoftwareAdapter
+{
+    SoftwareOperationResponse GetList(bool includeDeleted); 
+    SoftwareOperationResponse GetManufacturerList(string id, bool
+    includeDeleted);
+    SoftwareOperationResponse GetHistory(string id);
+    SoftwareOperationResponse GetElement(string data);
+    SoftwareOperationResponse RegisterSoftware(SoftwareBindingModel productModel);
+    SoftwareOperationResponse ChangeSoftwareInfo(SoftwareBindingModel
+    productModel);
+    SoftwareOperationResponse RemoveSoftware(string id);
+
+}

SmallSoftwareProject/SmallSoftwareContracts/AdapterContracts/IWorkerAdapter.cs

@@ -0,0 +1,23 @@
+using SmallSoftwareContracts.AdapterContracts.OperationResponses;
+using SmallSoftwareContracts.BindingModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareContracts.AdapterContracts;
+
+public interface IWorkerAdapter
+{
+    WorkerOperationResponse GetList(bool includeDeleted); 
+    WorkerOperationResponse GetPostList(string id, bool includeDeleted);
+    WorkerOperationResponse GetListByBirthDate(DateTime fromDate, DateTime toDate, bool includeDeleted);
+    WorkerOperationResponse GetListByEmploymentDate(DateTime fromDate, DateTime
+    toDate, bool includeDeleted);
+    WorkerOperationResponse GetElement(string data);
+    WorkerOperationResponse RegisterWorker(WorkerBindingModel workerModel);
+    WorkerOperationResponse ChangeWorkerInfo(WorkerBindingModel workerModel);
+    WorkerOperationResponse RemoveWorker(string id);
+
+}

SmallSoftwareProject/SmallSoftwareContracts/AdapterContracts/OperationResponses/ManufacturerOperationResponse.cs

@@ -0,0 +1,25 @@
+using SmallSoftwareContracts.Infrastructure;
+using SmallSoftwareContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareContracts.AdapterContracts.OperationResponses;
+
+public class ManufacturerOperationResponse : OperationResponse
+{
+    public static ManufacturerOperationResponse OK(List<ManufacturerViewModel>
+    data) => OK<ManufacturerOperationResponse, List<ManufacturerViewModel>>(data);
+    public static ManufacturerOperationResponse OK(ManufacturerViewModel data)
+    => OK<ManufacturerOperationResponse, ManufacturerViewModel>(data);
+    public static ManufacturerOperationResponse NoContent() =>
+    NoContent<ManufacturerOperationResponse>();
+    public static ManufacturerOperationResponse NotFound(string message) =>
+    NotFound<ManufacturerOperationResponse>(message);
+    public static ManufacturerOperationResponse BadRequest(string message) =>
+    BadRequest<ManufacturerOperationResponse>(message);
+    public static ManufacturerOperationResponse InternalServerError(string
+    message) => InternalServerError<ManufacturerOperationResponse>(message);
+}

SmallSoftwareProject/SmallSoftwareContracts/AdapterContracts/OperationResponses/PostOperationResponse.cs

@@ -0,0 +1,20 @@
+using SmallSoftwareContracts.Infrastructure;
+using SmallSoftwareContracts.ViewModels;
+
+namespace SmallSoftwareContracts.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);
+}

SmallSoftwareProject/SmallSoftwareContracts/AdapterContracts/OperationResponses/ReportOperationResponse.cs

@@ -0,0 +1,15 @@
+using SmallSoftwareContracts.DataModels;
+using SmallSoftwareContracts.Infrastructure;
+using SmallSoftwareContracts.ViewModels;
+
+namespace SmallSoftwareContracts.AdapterContracts.OperationResponses;
+
+public class ReportOperationResponse : OperationResponse
+{
+    public static ReportOperationResponse OK(List<HistoryOfSoftwareViewModel> data) => OK<ReportOperationResponse, List<HistoryOfSoftwareViewModel>>(data);
+    public static ReportOperationResponse OK(List<RequestViewModel> data) => OK<ReportOperationResponse, List<RequestViewModel>>(data);
+    public static ReportOperationResponse OK(Stream data, string filename) => OK<ReportOperationResponse, Stream>(data, filename);
+    public static ReportOperationResponse BadRequest(string message) => BadRequest<ReportOperationResponse>(message);
+    public static ReportOperationResponse InternalServerError(string message) => InternalServerError<ReportOperationResponse>(message);
+    public static ReportOperationResponse OK(List<WorkerSalaryByPeriodViewModel> data) => OK<ReportOperationResponse, List<WorkerSalaryByPeriodViewModel>>(data);
+}

SmallSoftwareProject/SmallSoftwareContracts/AdapterContracts/OperationResponses/RequestOperationResponse.cs

@@ -0,0 +1,19 @@
+using SmallSoftwareContracts.Infrastructure;
+using SmallSoftwareContracts.ViewModels;
+
+namespace SmallSoftwareContracts.AdapterContracts.OperationResponses;
+public class RequestOperationResponse : OperationResponse
+{
+    public static RequestOperationResponse OK(List<RequestViewModel> data) =>
+    OK<RequestOperationResponse, List<RequestViewModel>>(data); 
+    public static RequestOperationResponse OK(RequestViewModel data) =>
+    OK<RequestOperationResponse, RequestViewModel>(data);
+    public static RequestOperationResponse NoContent() =>
+    NoContent<RequestOperationResponse>();
+    public static RequestOperationResponse NotFound(string message) =>
+    NotFound<RequestOperationResponse>(message);
+    public static RequestOperationResponse BadRequest(string message) =>
+    BadRequest<RequestOperationResponse>(message);
+    public static RequestOperationResponse InternalServerError(string message) =>
+    InternalServerError<RequestOperationResponse>(message);
+}

SmallSoftwareProject/SmallSoftwareContracts/AdapterContracts/OperationResponses/SalaryOperationResponse.cs

@@ -0,0 +1,18 @@
+using SmallSoftwareContracts.Infrastructure;
+using SmallSoftwareContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareContracts.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);
+}

SmallSoftwareProject/SmallSoftwareContracts/AdapterContracts/OperationResponses/SoftwareOperationResponse.cs

@@ -0,0 +1,22 @@
+using SmallSoftwareContracts.Infrastructure;
+using SmallSoftwareContracts.ViewModels;
+
+namespace SmallSoftwareContracts.AdapterContracts.OperationResponses;
+
+public class SoftwareOperationResponse : OperationResponse
+{
+    public static SoftwareOperationResponse OK(List<SoftwareViewModel> data) =>
+    OK<SoftwareOperationResponse, List<SoftwareViewModel>>(data);
+    public static SoftwareOperationResponse OK(List<SoftwareHistoryViewModel>
+    data) => OK<SoftwareOperationResponse, List<SoftwareHistoryViewModel>>(data);
+    public static SoftwareOperationResponse OK(SoftwareViewModel data) =>
+    OK<SoftwareOperationResponse, SoftwareViewModel>(data);
+    public static SoftwareOperationResponse NoContent() =>
+    NoContent<SoftwareOperationResponse>();
+    public static SoftwareOperationResponse NotFound(string message) =>
+    NotFound<SoftwareOperationResponse>(message);
+    public static SoftwareOperationResponse BadRequest(string message) =>
+    BadRequest<SoftwareOperationResponse>(message);
+    public static SoftwareOperationResponse InternalServerError(string message)
+    => InternalServerError<SoftwareOperationResponse>(message);
+}

SmallSoftwareProject/SmallSoftwareContracts/AdapterContracts/OperationResponses/WorkerOperationResponse.cs

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

SmallSoftwareProject/SmallSoftwareContracts/BindingModels/InstallationRequestBindingModel.cs

@@ -0,0 +1,12 @@
+namespace SmallSoftwareContracts.BindingModels;
+
+public class InstallationRequestBindingModel
+
+{
+
+    public string? SoftwareId { get; set; }
+    public string? RequestId { get; set; }
+    public int Count { get; set; } 
+    public double Price { get; set; }
+
+}

SmallSoftwareProject/SmallSoftwareContracts/BindingModels/ManufacturerBindingModel.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareContracts.BindingModels;
+
+public class ManufacturerBindingModel
+{
+    public string? Id { get; set; }
+    public string? ManufacturerName { get; set; }
+}

SmallSoftwareProject/SmallSoftwareContracts/BindingModels/PostBindingModel.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareContracts.BindingModels;
+
+public class PostBindingModel
+{
+    public string? Id { get; set; } 
+    public string? PostId => Id;
+    public string? PostName { get; set; }
+    public string? PostType { get; set; }
+    public double Salary { get; set; }
+}

SmallSoftwareProject/SmallSoftwareContracts/BindingModels/RequestBindingModel.cs

@@ -0,0 +1,10 @@
+using SmallSoftwareContracts.DataModels;
+
+namespace SmallSoftwareContracts.BindingModels;
+
+public class RequestBindingModel
+{
+    public string? Id { get; set; }
+    public string? WorkerId { get; set; } 
+    public List<InstallationRequestBindingModel>? Softwares { get; set; }
+}

SmallSoftwareProject/SmallSoftwareContracts/BindingModels/SoftwareBindingModel.cs

@@ -0,0 +1,12 @@
+using SmallSoftwareContracts.Enums;
+
+namespace SmallSoftwareContracts.BindingModels;
+
+public class SoftwareBindingModel
+{
+    public string? Id { get; set; }
+    public string? SoftwareName { get;  set; }
+    public string? SoftwareType { get; set; }
+    public string? ManufacturerId { get; set; }
+    public double Price { get; set; }
+}

SmallSoftwareProject/SmallSoftwareContracts/BindingModels/WorkerBindingModel.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareContracts.BindingModels;
+public class WorkerBindingModel
+{
+    public string? Id { get; set; }
+    public string? FIO { get; set; }
+    public string? PostId { get; set; }
+    public DateTime BirthDate { get; set; }
+    public DateTime EmploymentDate { get; set; }
+    public string? ConfigurationJson { get; set; }
+}

SmallSoftwareProject/SmallSoftwareContracts/BusinessLogicsContracts/IManufacturerBusinessLogicContract.cs

@@ -0,0 +1,17 @@
+using SmallSoftwareContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareContracts.BusinessLogicsContracts;
+
+public interface IManufacturerBusinessLogicContract
+{
+    List<ManufacturerDataModel> GetAllManufacturers();
+    ManufacturerDataModel GetManufacturerByData(string data);
+    void InsertManufacturer(ManufacturerDataModel manufacturerDataModel);
+    void UpdateManufacturer(ManufacturerDataModel manufacturerDataModel); 
+    void DeleteManufacturer(string id);
+}

SmallSoftwareProject/SmallSoftwareContracts/BusinessLogicsContracts/IPostBusinessLogicContract.cs

@@ -0,0 +1,19 @@
+using SmallSoftwareContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareContracts.BusinessLogicsContracts;
+
+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);
+}

SmallSoftwareProject/SmallSoftwareContracts/BusinessLogicsContracts/IReportContract.cs

@@ -0,0 +1,13 @@
+using SmallSoftwareContracts.DataModels;
+
+namespace SmallSoftwareContracts.BusinessLogicsContracts;
+
+public interface IReportContract
+{
+    Task<List<HistoryOfSoftwareDataModel>> GetDataSoftwaresByHistoryAsync(CancellationToken ct);
+    Task<List<RequestDataModel>> GetDataRequestByPeriodAsync(DateTime dateStart, DateTime dateFinish, CancellationToken ct);
+    Task<Stream> CreateDocumentSoftwaresByHistoryAsync(CancellationToken ct);
+    Task<Stream> CreateDocumentRequestsByPeriodAsync(DateTime dateStart, DateTime dateFinish, CancellationToken ct);
+    Task<List<WorkerSalaryByPeriodDataModel>> GetDataSalaryByPeriodAsync(DateTime dateStart, DateTime dateFinish, CancellationToken ct);
+    Task<Stream> CreateDocumentSalaryByPeriodAsync(DateTime dateStart, DateTime dateFinish, CancellationToken ct);
+}

SmallSoftwareProject/SmallSoftwareContracts/BusinessLogicsContracts/IRequestBusinessLogicContract.cs

@@ -0,0 +1,19 @@
+using SmallSoftwareContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareContracts.BusinessLogicsContracts;
+
+public interface IRequestBusinessLogicContract
+{
+
+    List<RequestDataModel> GetAllRequestsByPeriod(DateTime fromDate, DateTime toDate);
+    List<RequestDataModel> GetAllRequestsByWorkerByPeriod(string workerId, DateTime fromDate, DateTime toDate);
+    List<RequestDataModel> GetAllRequestsBySoftwareByPeriod(string softwareId, DateTime fromDate, DateTime toDate);
+    RequestDataModel GetRequestByData(string data);
+    void InsertRequest(RequestDataModel requestDataModel);
+    void CancelRequest(string id);
+}

SmallSoftwareProject/SmallSoftwareContracts/BusinessLogicsContracts/ISalaryBusinessLogicContract.cs

@@ -0,0 +1,12 @@
+
+using SmallSoftwareContracts.DataModels;
+
+namespace SmallSoftwareContracts.BusinessLogicsContracts;
+
+public interface ISalaryBusinessLogicContract
+{
+    List<SalaryDataModel> GetAllSalariesByPeriod(DateTime fromDate, DateTime toDate); 
+    List<SalaryDataModel> GetAllSalariesByPeriodByWorker(DateTime fromDate, DateTime toDate, string workerId);
+    void CalculateSalaryByMonth(DateTime date);
+
+}

SmallSoftwareProject/SmallSoftwareContracts/BusinessLogicsContracts/ISoftwareBusinessLogicContract.cs

@@ -0,0 +1,16 @@
+using SmallSoftwareContracts.DataModels;
+
+namespace SmallSoftwareContracts.BusinessLogicsContracts;
+
+public interface ISoftwareBusinessLogicContract
+{
+    List<SoftwareDataModel> GetAllSoftwares(bool onlyActive = true);
+    List<SoftwareDataModel> GetAllSoftwaresByManufacturer(string manufacturerId,
+    bool onlyActive = true);
+    List<SoftwareHistoryDataModel> GetSoftwareHistoryBySoftware(string softwareId);
+    SoftwareDataModel GetSoftwareByData(string data);
+    void InsertSoftware(SoftwareDataModel softwareDataModel);
+    void UpdateSoftware(SoftwareDataModel softwareDataModel);
+    void DeleteSoftware(string id);
+
+}

SmallSoftwareProject/SmallSoftwareContracts/BusinessLogicsContracts/IWorkerBusinessLogicContract.cs

@@ -0,0 +1,17 @@
+using SmallSoftwareContracts.DataModels;
+
+namespace SmallSoftwareContracts.BusinessLogicsContracts;
+
+public interface IWorkerBusinessLogicContract
+{
+    List<WorkerDataModel> GetAllWorkers(bool onlyActive = true);
+    List<WorkerDataModel> GetAllWorkersByPost(string postId, bool onlyActive = true);
+    List<WorkerDataModel> GetAllWorkersByBirthDate(DateTime fromDate, DateTime toDate, bool onlyActive = true);
+    List<WorkerDataModel> GetAllWorkersByEmploymentDate(DateTime fromDate,
+    DateTime toDate, bool onlyActive = true);
+    WorkerDataModel GetWorkerByData(string data);
+    void InsertWorker(WorkerDataModel workerDataModel);
+    void UpdateWorker(WorkerDataModel workerDataModel);
+    void DeleteWorker(string id);
+
+}

SmallSoftwareProject/SmallSoftwareContracts/DataModels/HistoryOfSoftwareDataModel.cs

@@ -0,0 +1,8 @@
+namespace SmallSoftwareContracts.DataModels;
+
+public class HistoryOfSoftwareDataModel
+{
+    public required string SoftwareName { get; set; }
+    public required List<string> Histories { get; set; }
+    public required List<string> Data { get; set; }
+}

SmallSoftwareProject/SmallSoftwareContracts/DataModels/InstallationRequestDataModel.cs

@@ -4,11 +4,22 @@ using SmallSoftwareContracts.Infrastructure;
 
 namespace SmallSoftwareContracts.DataModels;
 
-public class InstallationRequestDataModel(string softwareId, string requestId, int count) : IValidation
+public class InstallationRequestDataModel(string softwareId, string requestId, int count, double price) : IValidation
 {
+    private readonly SoftwareDataModel? _software;
+
     public string SoftwareId { get; private set; } = softwareId;
     public string RequestId { get; private set; } = requestId;
-    public int Count { get; private set; } = count;
+    public int Count { get; private set; } = count; 
+    public double Price { get; private set; } = price;
+
+    public string SoftwareName => _software?.SoftwareName ?? string.Empty;
+    public InstallationRequestDataModel(string saleId, string softwareId, int count, double price, SoftwareDataModel software) : this(saleId, softwareId, count, price)
+    {
+        _software = software;
+    }
+
+
     public void Validate()
     {
         if (SoftwareId.IsEmpty())
@@ -21,5 +32,7 @@ public class InstallationRequestDataModel(string softwareId, string requestId, i
             throw new ValidationException("The value in the field RequestId is not a unique identifier");
         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");
     }
 }

SmallSoftwareProject/SmallSoftwareContracts/DataModels/ManufacturerDataModel.cs

@@ -13,6 +13,9 @@ prevManufacturerName, string? prevPrevManufacturerName) : IValidation
     prevManufacturerName;
     public string? PrevPrevManufacturerName { get; private set; } =
     prevPrevManufacturerName;
+
+    public ManufacturerDataModel(string id, string manufacturerName) : this(id, manufacturerName, null, null){ }
+
     public void Validate()
     {
         if (Id.IsEmpty())

SmallSoftwareProject/SmallSoftwareContracts/DataModels/PostDataModel.cs

@@ -5,37 +5,24 @@ using SmallSoftwareContracts.Infrastructure;
 
 namespace SmallSoftwareContracts.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, double salary) : 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 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 (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");
     }
-}
+}

SmallSoftwareProject/SmallSoftwareContracts/DataModels/RequestDataModel.cs

@@ -2,21 +2,42 @@
 using SmallSoftwareContracts.Extensions;
 using SmallSoftwareContracts.Infrastructure;
 using System.Text.RegularExpressions;
+using System.Xml;
 
 
 namespace SmallSoftwareContracts.DataModels;
 
 
-public class RequestDataModel(string id, string workerId, string email, double sum, 
-    bool isCancel, List<InstallationRequestDataModel> softwares) : IValidation
+public class RequestDataModel : IValidation
 {
-    public string Id { get; private set; } = id;
-    public string WorkerId { get; private set; } = workerId;
+    private readonly WorkerDataModel? _worker;
+    public string Id { get; private set; }
+    public string WorkerId { get; private set; }
     public DateTime RequestDate { get; private set; } = DateTime.UtcNow;
-    public string Email { get; private set; } = email;
-    public double Sum { get; private set; } = sum;
-    public bool IsCancel { get; private set; } = isCancel;
-    public List<InstallationRequestDataModel> Softwares { get; private set; } = softwares;
+    public string Email { get; private set; }
+    public double Sum { get; private set; }
+    public bool IsCancel { get; private set; }
+    public List<InstallationRequestDataModel>? Softwares { get; private set; }
+    public string WorkerFIO => _worker?.FIO ?? string.Empty;
+    public RequestDataModel(string id, string workerId, string email, bool isCancel, List<InstallationRequestDataModel> installationRequests, DateTime requestDate)
+    {
+        Id = id;
+        WorkerId = workerId;
+        Email = email;
+        IsCancel = isCancel;
+        Softwares = installationRequests;
+        Sum = Softwares?.Sum(x => x.Price * x.Count) ?? 0;
+    }
+
+    public RequestDataModel(string id, string workerId, string email, double sum, bool isCancel,
+    List<InstallationRequestDataModel> installationRequests, WorkerDataModel worker, DateTime requestDate)
+    : this(id, workerId, email, isCancel, installationRequests, requestDate)
+    {
+        Sum = sum;
+        _worker = worker;
+    }
+
+
     public void Validate()
     {
         if (Id.IsEmpty())
@@ -26,14 +47,14 @@ public class RequestDataModel(string id, string workerId, string email, double s
         if (WorkerId.IsEmpty())
             throw new ValidationException("Field WorkerId is empty");
         if (!WorkerId.IsGuid())
-            throw new ValidationException("The value in the field WorkerId  is not a unique identifier");
-        if (Email.IsEmpty())
-            throw new ValidationException("Worker Email is empty");
-        if (!Regex.IsMatch(Email, @"^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+$"))
-            throw new ValidationException("Field Email is not a email");
+            throw new ValidationException("The value in the field WorkerId is not a unique identifier");
         if (Sum <= 0)
             throw new ValidationException("Field Sum is less than or equal to 0");
         if ((Softwares?.Count ?? 0) == 0)
-            throw new ValidationException("The sale must include Softwares");
+            throw new ValidationException("The request must include products");
+        if (!Regex.IsMatch(Email, @"^[^@\s]+@[^@\s]+\.[^@\s]+$"))
+        {
+            throw new ValidationException("Invalid email format");
+        }
     }
 }

SmallSoftwareProject/SmallSoftwareContracts/DataModels/SalaryDataModel.cs

@@ -1,20 +1,23 @@
 using SmallSoftwareContracts.Exceptions;
 using SmallSoftwareContracts.Extensions;
 using SmallSoftwareContracts.Infrastructure;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace SmallSoftwareContracts.DataModels;
 
 public class SalaryDataModel(string workerId, DateTime salaryDate, double
 workerSalary) : IValidation
 {
+    private readonly WorkerDataModel? _worker;
     public string WorkerId { get; private set; } = workerId;
     public DateTime SalaryDate { get; private set; } = salaryDate;
     public double Salary { get; private set; } = workerSalary;
+    public string WorkerFIO => _worker?.FIO ?? string.Empty;
+
+    public SalaryDataModel(string workerId, DateTime salaryDate, double workerSalary, WorkerDataModel worker) : this(workerId, salaryDate, workerSalary)
+    {
+        _worker = worker;
+    }
+
     public void Validate()
     {
         if (WorkerId.IsEmpty())

SmallSoftwareProject/SmallSoftwareContracts/DataModels/SoftwareDataModel.cs

@@ -13,12 +13,28 @@ namespace SmallSoftwareContracts.DataModels;
 
 public class SoftwareDataModel(string id, string softwareName, SoftwareType softwareType, string manufacturerId, double price, bool isDeleted) : IValidation
 {
+    private readonly ManufacturerDataModel? _manufacturer;
     public string Id { get; private set; } = id;
     public string SoftwareName { get; private set; } = softwareName;
     public SoftwareType SoftwareType { get; private set; } = softwareType;
     public string ManufacturerId { get; private set; } = manufacturerId;
     public double Price { get; private set; } = price;
     public bool IsDeleted { get; private set; } = isDeleted;
+    public string ManufacturerName => _manufacturer?.ManufacturerName ?? string.Empty;
+
+    public SoftwareDataModel(string id, string softwareName, SoftwareType
+    softwareType, string manufacturerId, double price, bool isDeleted,
+    ManufacturerDataModel manufacturer) : this(id, softwareName, softwareType,
+    manufacturerId, price, isDeleted)
+    {
+        _manufacturer = manufacturer;
+    }
+    public SoftwareDataModel(string id, string softwareName, SoftwareType
+    softwareType, string manufacturerId, double price) : this(id, softwareName,
+    softwareType, manufacturerId, price, false)
+    { }
+
+
     public void Validate()
     {
         if (Id.IsEmpty())

SmallSoftwareProject/SmallSoftwareContracts/DataModels/SoftwareHistoryDataModel.cs

@@ -11,9 +11,19 @@ namespace SmallSoftwareContracts.DataModels;
 
 public class SoftwareHistoryDataModel(string softwareId, double oldPrice) : IValidation
 {
+    private readonly SoftwareDataModel? _software;
     public string SoftwareId { get; private set; } = softwareId;
     public double OldPrice { get; private set; } = oldPrice;
     public DateTime ChangeDate { get; private set; } = DateTime.UtcNow;
+
+    public string SoftwareName => _software?.SoftwareName ?? string.Empty;
+    public SoftwareHistoryDataModel(string softwareId, double oldPrice, DateTime
+    changeDate, SoftwareDataModel software) : this(softwareId, oldPrice) 
+    {
+    ChangeDate = changeDate;
+    _software = software;
+    }
+
     public void Validate()
     {
         if (SoftwareId.IsEmpty())

SmallSoftwareProject/SmallSoftwareContracts/DataModels/WorkerDataModel.cs

@@ -1,18 +1,51 @@
-using SmallSoftwareContracts.Exceptions;
+using Newtonsoft.Json.Linq;
+using Newtonsoft.Json;
+using SmallSoftwareContracts.Exceptions;
 using SmallSoftwareContracts.Extensions;
 using SmallSoftwareContracts.Infrastructure;
+using SmallSoftwareContracts.Infrastructure.PostConfigurations;
 
 namespace SmallSoftwareContracts.DataModels;
 
-public class WorkerDataModel(string id, string fio, string postId, DateTime
-birthDate, DateTime employmentDate, bool isDeleted) : IValidation
+public class WorkerDataModel(string id, string fio, string postId, DateTime birthDate, DateTime employmentDate, bool isDeleted, PostConfiguration configuration) : IValidation
 {
+    private readonly PostDataModel? _post;
     public string Id { get; private set; } = id;
     public string FIO { get; private set; } = fio;
     public string PostId { get; private set; } = postId;
     public DateTime BirthDate { get; private set; } = birthDate;
     public DateTime EmploymentDate { get; private set; } = employmentDate;
     public bool IsDeleted { get; private set; } = isDeleted;
+    public string PostName => _post?.PostName ?? string.Empty;
+    public PostConfiguration ConfigurationModel { get; private set; } = configuration;
+
+    public WorkerDataModel(string id, string fio, string postId, DateTime
+        birthDate, DateTime employmentDate, bool isDeleted, PostDataModel post) :
+        this(id, fio, postId, birthDate, employmentDate, isDeleted, new PostConfiguration { Rate = 10 })
+    {
+        _post = post;
+    }
+
+    public WorkerDataModel(string id, string fio, string postId, DateTime birthDate, DateTime employmentDate)
+    : this(id, fio, postId, birthDate, employmentDate, false, new PostConfiguration { Rate = 10 })
+    { }
+
+    public WorkerDataModel(string id, string fio, string postId, DateTime
+    birthDate, DateTime employmentDate, string configurationJson) :
+    this(id, fio, postId, birthDate, employmentDate, false, new PostConfiguration { Rate = 10 })
+    {
+        var obj = JToken.Parse(configurationJson);
+        if (obj is not null)
+        {
+            ConfigurationModel = obj.Value<string>("Type") switch
+            {
+                nameof(CashierPostConfiguration) => JsonConvert.DeserializeObject<CashierPostConfiguration>(configurationJson)!,
+                nameof(SupervisorPostConfiguration) => JsonConvert.DeserializeObject<SupervisorPostConfiguration>(configurationJson)!,
+                _ => JsonConvert.DeserializeObject<PostConfiguration>(configurationJson)!,
+            };
+        }
+    }
+
     public void Validate()
     {
         if (Id.IsEmpty())
@@ -31,6 +64,9 @@ birthDate, DateTime employmentDate, bool isDeleted) : IValidation
             throw new ValidationException("The date of employment cannot be less than the date of birth");
         if ((EmploymentDate - BirthDate).TotalDays / 365 < 16) 
             throw new ValidationException($"Minors cannot be hired (EmploymentDate - { EmploymentDate.ToShortDateString() }, BirthDate - { BirthDate.ToShortDateString()})");
-    
+        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");
     }
 }

SmallSoftwareProject/SmallSoftwareContracts/DataModels/WorkerSalaryByPeriodDataModel.cs

@@ -0,0 +1,10 @@
+namespace SmallSoftwareContracts.DataModels;
+
+public class WorkerSalaryByPeriodDataModel
+{
+    public required string WorkerFIO { get; set; }
+    public double TotalSalary { get; set; }
+    public DateTime FromPeriod { get; set; }
+    public DateTime ToPeriod { get; set; }
+}
+

SmallSoftwareProject/SmallSoftwareContracts/Exceptions/ElementDeletedException.cs

@@ -0,0 +1,5 @@
+namespace SmallSoftwareContracts.Exceptions;
+public class ElementDeletedException : Exception
+{
+    public ElementDeletedException(string id) : base($"Cannot modify a deleted item(id: { id})") { }
+}

SmallSoftwareProject/SmallSoftwareContracts/Exceptions/ElementExistsException.cs

@@ -0,0 +1,13 @@
+
+namespace SmallSoftwareContracts.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;
+    }
+}

SmallSoftwareProject/SmallSoftwareContracts/Exceptions/ElementNotFoundException.cs

@@ -0,0 +1,10 @@
+namespace SmallSoftwareContracts.Exceptions;
+
+public class ElementNotFoundException : Exception
+{
+    public string Value { get; private set; }
+    public ElementNotFoundException(string value) : base($"Element not found at value = { value}")
+    {
+        Value = value;
+    }
+}

SmallSoftwareProject/SmallSoftwareContracts/Exceptions/IncorrectDatesException.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using static System.Runtime.InteropServices.JavaScript.JSType;
+
+namespace SmallSoftwareContracts.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}") { }
+}

SmallSoftwareProject/SmallSoftwareContracts/Exceptions/NullListException.cs

@@ -0,0 +1,7 @@
+
+namespace SmallSoftwareContracts.Exceptions;
+
+public class NullListException : Exception
+{
+    public NullListException() : base("The returned list is null") { }
+}

SmallSoftwareProject/SmallSoftwareContracts/Exceptions/StorageException.cs

@@ -0,0 +1,8 @@
+
+
+namespace SmallSoftwareContracts.Exceptions;
+
+public class StorageException : Exception
+{
+    public StorageException(Exception ex) : base($"Error while working in storage: { ex.Message}", ex) { }
+}

SmallSoftwareProject/SmallSoftwareContracts/Extensions/DateTimeExtensions.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareContracts.Extensions;
+
+public static class DateTimeExtensions
+{
+    public static bool IsDateNotOlder(this DateTime date, DateTime olderDate)
+    {
+        return date >= olderDate;
+    }
+}
+

SmallSoftwareProject/SmallSoftwareContracts/Infrastructure/IConfigurationDatabase.cs

@@ -0,0 +1,6 @@
+namespace SmallSoftwareContracts.Infrastructure;
+
+public interface IConfigurationDatabase
+{
+    string ConnectionString { get; } 
+}

SmallSoftwareProject/SmallSoftwareContracts/Infrastructure/IConfigurationSalary.cs

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

SmallSoftwareProject/SmallSoftwareContracts/Infrastructure/OperationResponse.cs

@@ -0,0 +1,66 @@
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+using System.Net;
+
+namespace SmallSoftwareContracts.Infrastructure;
+
+public class OperationResponse
+{
+    protected HttpStatusCode StatusCode { get; set; }
+
+    protected object? Result { get; set; }
+
+    protected string? FileName { 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);
+        }
+        if (Result is Stream stream)
+        {
+            return new FileStreamResult(stream, "application/octetstream")
+            {
+                FileDownloadName = FileName
+            };
+        }
+        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 OK<TResult, TData>(TData data, string fileName) where TResult : OperationResponse, new() => new()
+    {
+        StatusCode = HttpStatusCode.OK,
+        Result = data,
+        FileName = fileName
+    };
+
+    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
+    };
+}

SmallSoftwareProject/SmallSoftwareContracts/Infrastructure/PostConfigurations/CashierPostConfiguration.cs

@@ -0,0 +1,8 @@
+namespace SmallSoftwareContracts.Infrastructure.PostConfigurations;
+
+public class CashierPostConfiguration : PostConfiguration
+{
+    public override string Type => nameof(CashierPostConfiguration);
+    public double SalePercent { get; set; }
+    public double BonusForExtraSales { get; set; }
+}

SmallSoftwareProject/SmallSoftwareContracts/Infrastructure/PostConfigurations/PostConfiguration.cs

@@ -0,0 +1,6 @@
+namespace SmallSoftwareContracts.Infrastructure.PostConfigurations;
+public class PostConfiguration
+{
+    public virtual string Type => nameof(PostConfiguration);
+    public double Rate { get; set; }
+}

SmallSoftwareProject/SmallSoftwareContracts/Infrastructure/PostConfigurations/SupervisorPostConfiguration.cs

@@ -0,0 +1,7 @@
+namespace SmallSoftwareContracts.Infrastructure.PostConfigurations;
+
+public class SupervisorPostConfiguration : PostConfiguration
+{
+    public override string Type => nameof(SupervisorPostConfiguration);
+    public double PersonalCountTrendPremium { get; set; }
+}

SmallSoftwareProject/SmallSoftwareContracts/SmallSoftwareContracts.csproj

@@ -6,4 +6,9 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="Microsoft.AspNetCore.Mvc.Abstractions" Version="2.3.0" />
+    <PackageReference Include="Microsoft.AspNetCore.Mvc.Core" Version="2.3.0" />
+  </ItemGroup>
+
 </Project>

SmallSoftwareProject/SmallSoftwareContracts/StoragesContracts/IManufacturerStorageContract.cs

@@ -0,0 +1,15 @@
+using SmallSoftwareContracts.DataModels;
+
+namespace SmallSoftwareContracts.StoragesContracts;
+
+public interface IManufacturerStorageContract
+{
+    List<ManufacturerDataModel> GetList();
+    ManufacturerDataModel? GetElementById(string id);
+    ManufacturerDataModel? GetElementByName(string name);
+    ManufacturerDataModel? GetElementByOldName(string name);
+    void AddElement(ManufacturerDataModel manufacturerDataModel);
+    void UpdElement(ManufacturerDataModel manufacturerDataModel);
+    void DelElement(string id);
+
+}

SmallSoftwareProject/SmallSoftwareContracts/StoragesContracts/IPostStorageContract.cs

@@ -0,0 +1,15 @@
+using SmallSoftwareContracts.DataModels;
+
+namespace SmallSoftwareContracts.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);
+}

SmallSoftwareProject/SmallSoftwareContracts/StoragesContracts/IRequestStorageContract.cs

@@ -0,0 +1,14 @@
+using SmallSoftwareContracts.DataModels;
+
+namespace SmallSoftwareContracts.StoragesContracts;
+
+public interface IRequestStorageContract
+{
+    Task<List<RequestDataModel>> GetListAsync(DateTime startDate, DateTime endDate, CancellationToken ct);
+
+    List<RequestDataModel> GetList(DateTime? startDate = null, 
+                                DateTime? endDate = null, string? workerId = null, string? softwareId = null);
+    RequestDataModel? GetElementById(string id);
+    void AddElement(RequestDataModel requestDataModel);
+    void DelElement(string id);
+}

SmallSoftwareProject/SmallSoftwareContracts/StoragesContracts/ISalaryStorageContract.cs

@@ -0,0 +1,11 @@
+using SmallSoftwareContracts.DataModels;
+
+namespace SmallSoftwareContracts.StoragesContracts;
+
+public interface ISalaryStorageContract
+{
+    List<SalaryDataModel> GetList(DateTime startDate, DateTime endDate, string? workerId = null);
+    void AddElement(SalaryDataModel salaryDataModel);
+    Task<List<SalaryDataModel>> GetListAsync(DateTime startDate, DateTime endDate, CancellationToken ct);
+
+}

SmallSoftwareProject/SmallSoftwareContracts/StoragesContracts/ISoftwareStorageContract.cs

@@ -0,0 +1,20 @@
+using SmallSoftwareContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareContracts.StoragesContracts;
+
+public interface ISoftwareStorageContract
+{
+    Task<List<SoftwareHistoryDataModel>> GetListAsync(CancellationToken ct);
+    List<SoftwareDataModel> GetList(bool onlyActive = true, string? manufacturerId = null);
+    List<SoftwareHistoryDataModel> GetHistoryBySoftwareId(string softwareId);
+    SoftwareDataModel? GetElementById(string id);
+    SoftwareDataModel? GetElementByName(string name);
+    void AddElement(SoftwareDataModel softwareDataModel);
+    void UpdElement(SoftwareDataModel softwareDataModel);
+    void DelElement(string id);
+}

SmallSoftwareProject/SmallSoftwareContracts/StoragesContracts/IWorkerStorageContract.cs

@@ -0,0 +1,21 @@
+using SmallSoftwareContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareContracts.StoragesContracts;
+
+public interface IWorkerStorageContract
+{
+    List<WorkerDataModel> GetList(bool onlyActive = true, string? postId =  
+                                  null, DateTime? fromBirthDate = null, DateTime? toBirthDate = null, DateTime?
+                                  fromEmploymentDate = null, DateTime? toEmploymentDate = null);
+    WorkerDataModel? GetElementById(string id);
+    WorkerDataModel? GetElementByFIO(string fio);
+    void AddElement(WorkerDataModel workerDataModel);
+    void UpdElement(WorkerDataModel workerDataModel);
+    void DelElement(string id); 
+    int GetWorkerTrend(DateTime fromPeriod, DateTime toPeriod);
+}

SmallSoftwareProject/SmallSoftwareContracts/ViewModels/HistoryOfSoftwareViewModel.cs

@@ -0,0 +1,8 @@
+namespace SmallSoftwareContracts.ViewModels;
+
+public class HistoryOfSoftwareViewModel
+{
+    public required string SoftwareName { get; set; }
+    public required List<string> Histories { get; set; }
+    public required List<string> Data { get; set; } 
+}

SmallSoftwareProject/SmallSoftwareContracts/ViewModels/InstallationRequestViewModel.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareContracts.ViewModels;
+
+public class InstallationRequestViewModel
+{
+    public required string SoftwareId { get; set; }
+    public required string SoftwareName { get; set; }
+    public int Count { get; set; }
+    public double Price { get; set; }
+}

SmallSoftwareProject/SmallSoftwareContracts/ViewModels/ManufacturerViewModel.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareContracts.ViewModels;
+
+public class ManufacturerViewModel
+{
+    public required string Id { get; set; }
+    public required string ManufacturerName { get; set; }
+    public string? PrevManufacturerName { get; set; }
+    public string? PrevPrevManufacturerName { get; set; }
+
+}

SmallSoftwareProject/SmallSoftwareContracts/ViewModels/PostViewModel.cs

@@ -0,0 +1,10 @@
+
+namespace SmallSoftwareContracts.ViewModels;
+
+public class PostViewModel
+{
+    public required string Id { get; set; }
+    public required string PostName { get; set; }
+    public required string PostType { get; set; }
+    public double Salary { get; set; }
+}

SmallSoftwareProject/SmallSoftwareContracts/ViewModels/RequestViewModel.cs

@@ -0,0 +1,14 @@
+
+namespace SmallSoftwareContracts.ViewModels;
+
+public class RequestViewModel
+{
+    public required string Id { get; set; }
+    public required string WorkerId { get; set; }
+    public required string WorkerFIO { get; set; }
+    public DateTime RequestDate { get; set; }
+    public double Sum { get; set; }
+    public bool IsCancel { get; set; }
+    public required List<InstallationRequestViewModel> Softwares { get; set; }
+
+}

SmallSoftwareProject/SmallSoftwareContracts/ViewModels/SalaryViewModel.cs

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

SmallSoftwareProject/SmallSoftwareContracts/ViewModels/SoftwareHistoryViewModel.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareContracts.ViewModels;
+
+public class SoftwareHistoryViewModel
+{
+    public required string SoftwareName { get; set; }
+    public double OldPrice { get; set; }
+    public DateTime ChangeDate { get; set; }
+}

SmallSoftwareProject/SmallSoftwareContracts/ViewModels/SoftwareViewModel.cs

@@ -0,0 +1,13 @@
+namespace SmallSoftwareContracts.ViewModels;
+
+public class SoftwareViewModel
+{
+    public required string Id { get; set; }
+    public required string SoftwareName { get; set; }
+    public required string ManufacturerId { get; set; }
+    public required string ManufacturerName { get; set; }
+    public required string SoftwareType { get; set; }
+    public double Price { get; set; }
+    public bool IsDeleted { get; set; }
+
+}

SmallSoftwareProject/SmallSoftwareContracts/ViewModels/WorkerSalaryByPeriodViewModel.cs

@@ -0,0 +1,9 @@
+namespace SmallSoftwareContracts.ViewModels;
+
+public class WorkerSalaryByPeriodViewModel
+{
+    public required string WorkerFIO { get; set; }
+    public double TotalSalary { get; set; }
+    public DateTime FromPeriod { get; set; }
+    public DateTime ToPeriod { get; set; }
+}

SmallSoftwareProject/SmallSoftwareContracts/ViewModels/WorkerViewModel.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareContracts.ViewModels;
+
+public class WorkerViewModel
+{
+    public required string Id { get; set; }
+    public required string FIO { 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; }
+    public required string Configuration { get; set; }
+}

SmallSoftwareProject/SmallSoftwareDatabase/DefaultConfigurationDatabase.cs

@@ -0,0 +1,13 @@
+using SmallSoftwareContracts.Infrastructure;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareDatabase;
+
+class DefaultConfigurationDatabase : IConfigurationDatabase
+{
+    public string ConnectionString => "";
+}

SmallSoftwareProject/SmallSoftwareDatabase/Implementations/ManufacturerStorageContract.cs

@@ -0,0 +1,166 @@
+using AutoMapper;
+using Microsoft.EntityFrameworkCore;
+using Npgsql;
+using SmallSoftwareContracts.DataModels;
+using SmallSoftwareContracts.Exceptions;
+using SmallSoftwareContracts.StoragesContracts;
+using SmallSoftwareDatabase.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareDatabase.Implementations;
+internal class ManufacturerStorageContract : IManufacturerStorageContract
+{
+    private readonly SmallSoftwareDbContext _dbContext;
+    private readonly Mapper _mapper; 
+public ManufacturerStorageContract(SmallSoftwareDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.AddMaps(typeof(Manufacturer));
+        });
+        _mapper = new Mapper(config);
+    }
+    public List<ManufacturerDataModel> GetList()
+    {
+        try
+        {
+            return [.. _dbContext.Manufacturers.Select(x => _mapper.Map<ManufacturerDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public ManufacturerDataModel? GetElementById(string id)
+    {
+        try
+        {
+            return
+            _mapper.Map<ManufacturerDataModel>(GetManufacturerById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public ManufacturerDataModel? GetElementByName(string name)
+    {
+        try
+        {
+            return
+            _mapper.Map<ManufacturerDataModel>(_dbContext.Manufacturers.FirstOrDefault(x => x.ManufacturerName == name));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public ManufacturerDataModel? GetElementByOldName(string name)
+    {
+        try
+        {
+            return
+            _mapper.Map<ManufacturerDataModel>(_dbContext.Manufacturers.FirstOrDefault(x =>
+            x.PrevManufacturerName == name ||
+            x.PrevPrevManufacturerName == name));
+        } 
+        catch (Exception ex)
+{
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public void AddElement(ManufacturerDataModel manufacturerDataModel)
+    {
+        try
+        {
+            _dbContext.Manufacturers.Add(_mapper.Map<Manufacturer>(manufacturerDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (InvalidOperationException ex) when (ex.TargetSite?.Name ==
+        "ThrowIdentityConflict")
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("Id",
+            manufacturerDataModel.Id);
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is
+        PostgresException { ConstraintName: "IX_Manufacturers_ManufacturerName" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("ManufacturerName",
+            manufacturerDataModel.ManufacturerName);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public void UpdElement(ManufacturerDataModel manufacturerDataModel)
+    {
+        try
+        {
+            var element = GetManufacturerById(manufacturerDataModel.Id) ??
+            throw new ElementNotFoundException(manufacturerDataModel.Id);
+            if (element.ManufacturerName !=
+            manufacturerDataModel.ManufacturerName)
+            {
+                element.PrevPrevManufacturerName =
+                element.PrevManufacturerName;
+                element.PrevManufacturerName = element.ManufacturerName;
+                element.ManufacturerName =
+                manufacturerDataModel.ManufacturerName;
+            }
+            _dbContext.Manufacturers.Update(element);
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is
+        PostgresException { ConstraintName: "IX_Manufacturers_ManufacturerName" })
+        {
+            _dbContext.ChangeTracker.Clear(); 
+        throw new ElementExistsException("ManufacturerName",
+        manufacturerDataModel.ManufacturerName);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public void DelElement(string id)
+    {
+        try
+        {
+            var element = GetManufacturerById(id) ?? throw new
+            ElementNotFoundException(id);
+            _dbContext.Manufacturers.Remove(element);
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    private Manufacturer? GetManufacturerById(string id) =>
+    _dbContext.Manufacturers.FirstOrDefault(x => x.Id == id);
+}

SmallSoftwareProject/SmallSoftwareDatabase/Implementations/PostStorageContract.cs

@@ -0,0 +1,192 @@
+using AutoMapper;
+using Microsoft.EntityFrameworkCore;
+using Npgsql;
+using SmallSoftwareContracts.DataModels;
+using SmallSoftwareContracts.Exceptions;
+using SmallSoftwareContracts.StoragesContracts;
+using SmallSoftwareDatabase.Models;
+
+namespace SmallSoftwareDatabase.Implementations;
+
+internal class PostStorageContract : IPostStorageContract
+{
+    private readonly SmallSoftwareDbContext _dbContext;
+    private readonly Mapper _mapper;
+    public PostStorageContract(SmallSoftwareDbContext 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));
+                
+        });
+        _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();
+}
+

SmallSoftwareProject/SmallSoftwareDatabase/Implementations/RequestStorageContract.cs

@@ -0,0 +1,134 @@
+using AutoMapper;
+using Microsoft.EntityFrameworkCore;
+using SmallSoftwareContracts.DataModels;
+using SmallSoftwareContracts.Exceptions;
+using SmallSoftwareContracts.StoragesContracts;
+using SmallSoftwareDatabase.Models;
+
+namespace SmallSoftwareDatabase.Implementations;
+
+internal class RequestStorageContract : IRequestStorageContract
+{
+    private readonly SmallSoftwareDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public RequestStorageContract(SmallSoftwareDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<Manufacturer, ManufacturerDataModel>();
+            cfg.CreateMap<Software, SoftwareDataModel>();
+            cfg.CreateMap<Worker, WorkerDataModel>();
+            cfg.CreateMap<InstallationRequest, InstallationRequestDataModel>();
+            cfg.CreateMap<InstallationRequestDataModel, InstallationRequest>()
+                .ForMember(x => x.SoftwareId, x => x.MapFrom(src => src.SoftwareId));
+            cfg.CreateMap<Request, RequestDataModel>();
+            cfg.CreateMap<RequestDataModel, Request>()
+                .ForMember(x => x.IsCancel, x => x.MapFrom(src => false))
+                .ForMember(x => x.InstallationRequests, x => x.MapFrom(src => src.Softwares))
+                .ForMember(x => x.Worker, x => x.Ignore())
+                .ForMember(dest => dest.RequestDate, opt => opt.MapFrom(src => src.RequestDate))
+                .ForMember(dest => dest.RequestDate, opt => opt.MapFrom(src => src.RequestDate));
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<RequestDataModel> GetList(DateTime? startDate = null, DateTime? endDate = null, string? workerId = null, string? softwareId = null)
+    {
+        try
+        {
+            var query = _dbContext.Requests.Include(x => x.Worker).Include(x => x.InstallationRequests).AsQueryable();
+            if (workerId is not null)
+            {
+                query = query.Where(x => x.WorkerId == workerId);
+            }
+            if (softwareId is not null)
+            {
+                query = query.Where(x => x.InstallationRequests!.Any(y => y.SoftwareId == softwareId));
+            }
+            return [.. query.Select(x => _mapper.Map<RequestDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public RequestDataModel? GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<RequestDataModel>(GetRequestById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(RequestDataModel requestDataModel)
+    {
+        try
+        {
+            _dbContext.Requests.Add(_mapper.Map<Request>(requestDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void DelElement(string id)
+    {
+        try
+        {
+            var element = GetRequestById(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 Request? GetRequestById(string id)  =>
+        _dbContext.Requests
+            .Include(x => x.Worker)
+            .Include(x => x.InstallationRequests)!
+            .ThenInclude(x => x.Software)
+            .FirstOrDefault(x => x.Id == id);
+
+    public async Task<List<RequestDataModel>> GetListAsync(DateTime startDate, DateTime endDate, CancellationToken ct)
+    {
+        try
+        {
+            return [.. await _dbContext.Requests
+                .Include(x => x.InstallationRequests)!.ThenInclude(x => x.Software)
+                .Where(x => x.RequestDate >= startDate && x.RequestDate < endDate).Select(x => _mapper.Map<RequestDataModel>(x)).ToListAsync(ct)];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+
+    }
+}

SmallSoftwareProject/SmallSoftwareDatabase/Implementations/SalaryStorageContract.cs

@@ -0,0 +1,69 @@
+using AutoMapper;
+using Microsoft.EntityFrameworkCore;
+using SmallSoftwareContracts.DataModels;
+using SmallSoftwareContracts.Exceptions;
+using SmallSoftwareContracts.StoragesContracts;
+using SmallSoftwareDatabase.Models;
+
+namespace SmallSoftwareDatabase.Implementations;
+
+internal class SalaryStorageContract : ISalaryStorageContract
+{
+    private readonly SmallSoftwareDbContext _dbContext;
+    private readonly Mapper _mapper; 
+    public SalaryStorageContract(SmallSoftwareDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<Worker, WorkerDataModel>();
+            cfg.CreateMap<Salary, SalaryDataModel>();
+            cfg.CreateMap<SalaryDataModel, Salary>()
+                .ForMember(dest => dest.WorkerSalary, opt => opt.MapFrom(src => src.Salary));
+        });
+        _mapper = new Mapper(config);
+    }
+    public List<SalaryDataModel> GetList(DateTime startDate, DateTime endDate, string? workerId = null)
+    {
+        try
+        {
+            var query = _dbContext.Salaries.Include(x => x.Worker).Where(x => x.SalaryDate >= startDate && x.SalaryDate <= endDate);
+            if (workerId is not null)
+            {
+                query = query.Where(x => x.WorkerId == workerId);
+            }
+            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);
+        }
+    }
+
+    public async Task<List<SalaryDataModel>> GetListAsync(DateTime startDate, DateTime endDate, CancellationToken ct)
+    {
+        try
+        {
+            return [.. await _dbContext.Salaries.Include(x => x.Worker).Where(x => x.SalaryDate >= startDate && x.SalaryDate <= endDate).Select(x => _mapper.Map<SalaryDataModel>(x)).ToListAsync(ct)];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+}

SmallSoftwareProject/SmallSoftwareDatabase/Implementations/SoftwareStorageContract.cs

@@ -0,0 +1,203 @@
+using AutoMapper;
+using Microsoft.EntityFrameworkCore;
+using Npgsql;
+using SmallSoftwareContracts.DataModels;
+using SmallSoftwareContracts.Exceptions;
+using SmallSoftwareContracts.StoragesContracts;
+using SmallSoftwareDatabase.Models;
+
+namespace SmallSoftwareDatabase.Implementations;
+
+internal class SoftwareStorageContract : ISoftwareStorageContract
+{
+    private readonly SmallSoftwareDbContext _dbContext;
+    private readonly Mapper _mapper;
+    public SoftwareStorageContract(SmallSoftwareDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<Manufacturer, ManufacturerDataModel>();
+            cfg.CreateMap<Software, SoftwareDataModel>();
+            cfg.CreateMap<SoftwareDataModel, Software>()
+            .ForMember(x => x.IsDeleted, x => x.MapFrom(src => false)); 
+        cfg.CreateMap<SoftwareHistory, SoftwareHistoryDataModel>();
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public async Task<List<SoftwareHistoryDataModel>> GetListAsync(CancellationToken ct)
+    {
+
+        try
+        {
+            return [.. await _dbContext.SoftwareHistories.Include(x => x.Software).Select(x => _mapper.Map<SoftwareHistoryDataModel>(x)).ToListAsync(ct)];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+
+    }
+
+
+    public List<SoftwareDataModel> GetList(bool onlyActive = true, string? manufacturerId = null)
+    {
+        try
+        {
+            var query = _dbContext.Softwares.Include(x => x.Manufacturer).AsQueryable();
+            if (onlyActive)
+            {
+                query = query.Where(x => !x.IsDeleted);
+            }
+            if (manufacturerId is not null)
+            {
+                query = query.Where(x => x.ManufacturerId ==
+                manufacturerId);
+            }
+            return [.. query.Select(x => _mapper.Map<SoftwareDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public List<SoftwareHistoryDataModel> GetHistoryBySoftwareId(string
+    softwareId)
+    {
+        try
+        {
+            return [.. _dbContext.SoftwareHistories.Include(x => x.Software).Where(x => x.SoftwareId == softwareId)
+                .OrderByDescending(x => x.ChangeDate)
+                .Select(x => _mapper.Map<SoftwareHistoryDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public SoftwareDataModel? GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<SoftwareDataModel>(GetSoftwareById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public SoftwareDataModel? GetElementByName(string name)
+    {
+        try
+        {
+        return
+        _mapper.Map<SoftwareDataModel>(_dbContext.Softwares.Include(x => x.Manufacturer).FirstOrDefault(x =>
+        x.SoftwareName == name && !x.IsDeleted));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public void AddElement(SoftwareDataModel softwareDataModel)
+    {
+        try
+        {
+            _dbContext.Softwares.Add(_mapper.Map<Software>(softwareDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (InvalidOperationException ex) when (ex.TargetSite?.Name ==
+        "ThrowIdentityConflict")
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("Id", softwareDataModel.Id);
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is
+        PostgresException { ConstraintName: "IX_Softwares_SoftwareName_IsDeleted" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("SoftwareName",
+            softwareDataModel.SoftwareName);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public void UpdElement(SoftwareDataModel softwareDataModel)
+    {
+        try
+        {
+            var transaction = _dbContext.Database.BeginTransaction();
+            try
+            {
+                var element = GetSoftwareById(softwareDataModel.Id) ??
+                throw new ElementNotFoundException(softwareDataModel.Id);
+                if (element.Price != softwareDataModel.Price)
+                {
+                    _dbContext.SoftwareHistories.Add(new
+                    SoftwareHistory()
+                    { SoftwareId = element.Id, OldPrice = element.Price });
+                    _dbContext.SaveChanges();
+                }
+                _dbContext.Softwares.Update(_mapper.Map(softwareDataModel,
+                element));
+                _dbContext.SaveChanges();
+                transaction.Commit();
+            }
+            catch
+            {
+                transaction.Rollback();
+                throw;
+            } 
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is
+        PostgresException { ConstraintName: "IX_Softwares_SoftwareName_IsDeleted" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("SoftwareName",
+            softwareDataModel.SoftwareName);
+        }
+        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 = GetSoftwareById(id) ?? throw new
+            ElementNotFoundException(id);
+            element.IsDeleted = true;
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    private Software? GetSoftwareById(string id) =>
+    _dbContext.Softwares.Include(x => x.Manufacturer).FirstOrDefault(x => x.Id == id && !x.IsDeleted);
+}
+

SmallSoftwareProject/SmallSoftwareDatabase/Implementations/WorkerStorageContract.cs

@@ -0,0 +1,177 @@
+using AutoMapper;
+using SmallSoftwareContracts.DataModels;
+using SmallSoftwareContracts.Exceptions;
+using SmallSoftwareContracts.StoragesContracts;
+using SmallSoftwareDatabase.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareDatabase.Implementations;
+
+internal class WorkerStorageContract : IWorkerStorageContract
+{
+    private readonly SmallSoftwareDbContext _dbContext;
+    private readonly Mapper _mapper;
+    public WorkerStorageContract(SmallSoftwareDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<Post, PostDataModel>() 
+        .ForMember(x => x.Id, x => x.MapFrom(src =>
+        src.PostId));
+            cfg.CreateMap<Worker, WorkerDataModel>();
+            cfg.CreateMap<WorkerDataModel, Worker>()
+            .ForMember(x => x.Post, x => x.Ignore())
+            .ForMember(x => x.Configuration, x => x.MapFrom(src => src.ConfigurationModel));
+        });
+        _mapper = new Mapper(config);
+    }
+    public List<WorkerDataModel> GetList(bool onlyActive = true, string? postId
+    = null, DateTime? fromBirthDate = null, DateTime? toBirthDate = null, DateTime?
+    fromEmploymentDate = null, DateTime? toEmploymentDate = null)
+    {
+        try
+        {
+            var query = _dbContext.Workers.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 >= fromBirthDate &&
+                x.BirthDate <= toBirthDate);
+            }
+            if (fromEmploymentDate is not null && toEmploymentDate is not
+            null)
+            {
+                query = query.Where(x => x.EmploymentDate >=
+                fromEmploymentDate && x.EmploymentDate <= toEmploymentDate);
+            }
+            return [.. JoinPost(query).Select(x => _mapper.Map<WorkerDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public WorkerDataModel? GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<WorkerDataModel>(GetWorkerById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public WorkerDataModel? GetElementByFIO(string fio)
+    {
+        try
+        { 
+        return
+        _mapper.Map<WorkerDataModel>(AddPost(_dbContext.Workers.FirstOrDefault(x => x.FIO == fio && !x.IsDeleted)));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public void AddElement(WorkerDataModel workerDataModel)
+    {
+        try
+        {
+            _dbContext.Workers.Add(_mapper.Map<Worker>(workerDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (InvalidOperationException ex) when (ex.TargetSite?.Name == "ThrowIdentityConflict")
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("Id", workerDataModel.Id);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public void UpdElement(WorkerDataModel workerDataModel)
+    {
+        try
+        {
+            var element = GetWorkerById(workerDataModel.Id) ?? throw new
+            ElementNotFoundException(workerDataModel.Id);
+            _dbContext.Workers.Update(_mapper.Map(workerDataModel,
+            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 = GetWorkerById(id) ?? throw new
+            ElementNotFoundException(id);
+            element.IsDeleted = true;
+            element.DateOfDelete = DateTime.UtcNow;
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        { 
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public int GetWorkerTrend(DateTime fromPeriod, DateTime toPeriod)
+    {
+        try
+        {
+            var countWorkersOnBegining = _dbContext.Workers.Count(x =>
+            x.EmploymentDate < fromPeriod && (!x.IsDeleted || x.DateOfDelete > fromPeriod));
+            var countWorkersOnEnding = _dbContext.Workers.Count(x =>
+            x.EmploymentDate < toPeriod && (!x.IsDeleted || x.DateOfDelete > toPeriod));
+            return countWorkersOnEnding - countWorkersOnBegining;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+
+    }
+
+    private Worker? GetWorkerById(string id) => AddPost(_dbContext.Workers.FirstOrDefault(x => x.Id == id && !x.IsDeleted));
+    private IQueryable<Worker> JoinPost(IQueryable<Worker> query) => query.GroupJoin(_dbContext.Posts.Where(x => x.IsActual), x =>
+        x.PostId, y => y.PostId, (x, y) => new { Worker = x, Post = y }).SelectMany(xy => xy.Post.DefaultIfEmpty(), (x, y) => x.Worker.AddPost(y));
+    private Worker? AddPost(Worker? worker) => worker?.AddPost(_dbContext.Posts.FirstOrDefault(x => x.PostId == worker.PostId && x.IsActual));
+
+
+}

SmallSoftwareProject/SmallSoftwareDatabase/Migrations/20250417140247_FirstMigration.Designer.cs

@@ -0,0 +1,338 @@
+// <auto-generated />
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+using SmallSoftwareDatabase;
+
+#nullable disable
+
+namespace SmallSoftwareDatabase.Migrations
+{
+    [DbContext(typeof(SmallSoftwareDbContext))]
+    [Migration("20250417140247_FirstMigration")]
+    partial class FirstMigration
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "9.0.2")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.InstallationRequest", b =>
+                {
+                    b.Property<string>("RequestId")
+                        .HasColumnType("text");
+
+                    b.Property<string>("SoftwareId")
+                        .HasColumnType("text");
+
+                    b.Property<int>("Count")
+                        .HasColumnType("integer");
+
+                    b.Property<double>("Price")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("RequestId", "SoftwareId");
+
+                    b.HasIndex("SoftwareId");
+
+                    b.ToTable("InstallationRequests");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Manufacturer", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<string>("ManufacturerName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("PrevManufacturerName")
+                        .HasColumnType("text");
+
+                    b.Property<string>("PrevPrevManufacturerName")
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ManufacturerName")
+                        .IsUnique();
+
+                    b.ToTable("Manufacturers");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Post", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("ChangeDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<bool>("IsActual")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("PostId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("PostName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("PostType")
+                        .HasColumnType("integer");
+
+                    b.Property<double>("Salary")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("PostId", "IsActual")
+                        .IsUnique()
+                        .HasFilter("\"IsActual\" = TRUE");
+
+                    b.HasIndex("PostName", "IsActual")
+                        .IsUnique()
+                        .HasFilter("\"IsActual\" = TRUE");
+
+                    b.ToTable("Posts");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Request", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<string>("Email")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<bool>("IsCancel")
+                        .HasColumnType("boolean");
+
+                    b.Property<DateTime>("RequestDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<double>("Sum")
+                        .HasColumnType("double precision");
+
+                    b.Property<string>("WorkerId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("WorkerId");
+
+                    b.ToTable("Requests");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Salary", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("SalaryDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<string>("WorkerId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<double>("WorkerSalary")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("WorkerId");
+
+                    b.ToTable("Salaries");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Software", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<bool>("IsDeleted")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("ManufacturerId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("PrevPrevSoftwareName")
+                        .HasColumnType("text");
+
+                    b.Property<string>("PrevSoftwareName")
+                        .HasColumnType("text");
+
+                    b.Property<double>("Price")
+                        .HasColumnType("double precision");
+
+                    b.Property<string>("SoftwareName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("SoftwareType")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ManufacturerId");
+
+                    b.HasIndex("SoftwareName", "IsDeleted")
+                        .IsUnique()
+                        .HasFilter("\"IsDeleted\" = FALSE");
+
+                    b.ToTable("Softwares");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.SoftwareHistory", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("ChangeDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<double>("OldPrice")
+                        .HasColumnType("double precision");
+
+                    b.Property<string>("SoftwareId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("SoftwareId");
+
+                    b.ToTable("SoftwareHistories");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Worker", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("BirthDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<DateTime>("EmploymentDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<string>("FIO")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<bool>("IsDeleted")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("PostId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Workers");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.InstallationRequest", b =>
+                {
+                    b.HasOne("SmallSoftwareDatabase.Models.Request", "Request")
+                        .WithMany("InstallationRequests")
+                        .HasForeignKey("RequestId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("SmallSoftwareDatabase.Models.Software", "Software")
+                        .WithMany("InstallationRequests")
+                        .HasForeignKey("SoftwareId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Request");
+
+                    b.Navigation("Software");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Request", b =>
+                {
+                    b.HasOne("SmallSoftwareDatabase.Models.Worker", "Worker")
+                        .WithMany("Requests")
+                        .HasForeignKey("WorkerId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Worker");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Salary", b =>
+                {
+                    b.HasOne("SmallSoftwareDatabase.Models.Worker", "Worker")
+                        .WithMany("Salaries")
+                        .HasForeignKey("WorkerId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Worker");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Software", b =>
+                {
+                    b.HasOne("SmallSoftwareDatabase.Models.Manufacturer", "Manufacturer")
+                        .WithMany("Softwares")
+                        .HasForeignKey("ManufacturerId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.Navigation("Manufacturer");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.SoftwareHistory", b =>
+                {
+                    b.HasOne("SmallSoftwareDatabase.Models.Software", "Software")
+                        .WithMany("SoftwareHistories")
+                        .HasForeignKey("SoftwareId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Software");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Manufacturer", b =>
+                {
+                    b.Navigation("Softwares");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Request", b =>
+                {
+                    b.Navigation("InstallationRequests");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Software", b =>
+                {
+                    b.Navigation("InstallationRequests");
+
+                    b.Navigation("SoftwareHistories");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Worker", b =>
+                {
+                    b.Navigation("Requests");
+
+                    b.Navigation("Salaries");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

SmallSoftwareProject/SmallSoftwareDatabase/Migrations/20250417140247_FirstMigration.cs

@@ -0,0 +1,254 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace SmallSoftwareDatabase.Migrations
+{
+    /// <inheritdoc />
+    public partial class FirstMigration : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "Manufacturers",
+                columns: table => new
+                {
+                    Id = table.Column<string>(type: "text", nullable: false),
+                    ManufacturerName = table.Column<string>(type: "text", nullable: false),
+                    PrevManufacturerName = table.Column<string>(type: "text", nullable: true),
+                    PrevPrevManufacturerName = table.Column<string>(type: "text", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Manufacturers", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Posts",
+                columns: table => new
+                {
+                    Id = table.Column<string>(type: "text", nullable: false),
+                    PostId = table.Column<string>(type: "text", nullable: false),
+                    PostName = table.Column<string>(type: "text", nullable: false),
+                    PostType = table.Column<int>(type: "integer", nullable: false),
+                    Salary = table.Column<double>(type: "double precision", nullable: false),
+                    IsActual = table.Column<bool>(type: "boolean", nullable: false),
+                    ChangeDate = table.Column<DateTime>(type: "timestamp without time zone", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Posts", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Workers",
+                columns: table => new
+                {
+                    Id = table.Column<string>(type: "text", nullable: false),
+                    FIO = table.Column<string>(type: "text", nullable: false),
+                    PostId = table.Column<string>(type: "text", nullable: false),
+                    BirthDate = table.Column<DateTime>(type: "timestamp without time zone", nullable: false),
+                    EmploymentDate = table.Column<DateTime>(type: "timestamp without time zone", nullable: false),
+                    IsDeleted = table.Column<bool>(type: "boolean", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Workers", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Softwares",
+                columns: table => new
+                {
+                    Id = table.Column<string>(type: "text", nullable: false),
+                    SoftwareName = table.Column<string>(type: "text", nullable: false),
+                    SoftwareType = table.Column<int>(type: "integer", nullable: false),
+                    ManufacturerId = table.Column<string>(type: "text", nullable: false),
+                    Price = table.Column<double>(type: "double precision", nullable: false),
+                    IsDeleted = table.Column<bool>(type: "boolean", nullable: false),
+                    PrevSoftwareName = table.Column<string>(type: "text", nullable: true),
+                    PrevPrevSoftwareName = table.Column<string>(type: "text", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Softwares", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_Softwares_Manufacturers_ManufacturerId",
+                        column: x => x.ManufacturerId,
+                        principalTable: "Manufacturers",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Restrict);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Requests",
+                columns: table => new
+                {
+                    Id = table.Column<string>(type: "text", nullable: false),
+                    WorkerId = table.Column<string>(type: "text", nullable: false),
+                    RequestDate = table.Column<DateTime>(type: "timestamp without time zone", nullable: false),
+                    Email = table.Column<string>(type: "text", nullable: false),
+                    Sum = table.Column<double>(type: "double precision", nullable: false),
+                    IsCancel = table.Column<bool>(type: "boolean", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Requests", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_Requests_Workers_WorkerId",
+                        column: x => x.WorkerId,
+                        principalTable: "Workers",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Salaries",
+                columns: table => new
+                {
+                    Id = table.Column<string>(type: "text", nullable: false),
+                    WorkerId = table.Column<string>(type: "text", nullable: false),
+                    WorkerSalary = table.Column<double>(type: "double precision", nullable: false),
+                    SalaryDate = table.Column<DateTime>(type: "timestamp without time zone", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Salaries", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_Salaries_Workers_WorkerId",
+                        column: x => x.WorkerId,
+                        principalTable: "Workers",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "SoftwareHistories",
+                columns: table => new
+                {
+                    Id = table.Column<string>(type: "text", nullable: false),
+                    SoftwareId = table.Column<string>(type: "text", nullable: false),
+                    OldPrice = table.Column<double>(type: "double precision", nullable: false),
+                    ChangeDate = table.Column<DateTime>(type: "timestamp without time zone", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_SoftwareHistories", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_SoftwareHistories_Softwares_SoftwareId",
+                        column: x => x.SoftwareId,
+                        principalTable: "Softwares",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "InstallationRequests",
+                columns: table => new
+                {
+                    SoftwareId = table.Column<string>(type: "text", nullable: false),
+                    RequestId = table.Column<string>(type: "text", nullable: false),
+                    Count = table.Column<int>(type: "integer", nullable: false),
+                    Price = table.Column<double>(type: "double precision", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_InstallationRequests", x => new { x.RequestId, x.SoftwareId });
+                    table.ForeignKey(
+                        name: "FK_InstallationRequests_Requests_RequestId",
+                        column: x => x.RequestId,
+                        principalTable: "Requests",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_InstallationRequests_Softwares_SoftwareId",
+                        column: x => x.SoftwareId,
+                        principalTable: "Softwares",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_InstallationRequests_SoftwareId",
+                table: "InstallationRequests",
+                column: "SoftwareId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Manufacturers_ManufacturerName",
+                table: "Manufacturers",
+                column: "ManufacturerName",
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Posts_PostId_IsActual",
+                table: "Posts",
+                columns: new[] { "PostId", "IsActual" },
+                unique: true,
+                filter: "\"IsActual\" = TRUE");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Posts_PostName_IsActual",
+                table: "Posts",
+                columns: new[] { "PostName", "IsActual" },
+                unique: true,
+                filter: "\"IsActual\" = TRUE");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Requests_WorkerId",
+                table: "Requests",
+                column: "WorkerId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Salaries_WorkerId",
+                table: "Salaries",
+                column: "WorkerId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_SoftwareHistories_SoftwareId",
+                table: "SoftwareHistories",
+                column: "SoftwareId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Softwares_ManufacturerId",
+                table: "Softwares",
+                column: "ManufacturerId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Softwares_SoftwareName_IsDeleted",
+                table: "Softwares",
+                columns: new[] { "SoftwareName", "IsDeleted" },
+                unique: true,
+                filter: "\"IsDeleted\" = FALSE");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "InstallationRequests");
+
+            migrationBuilder.DropTable(
+                name: "Posts");
+
+            migrationBuilder.DropTable(
+                name: "Salaries");
+
+            migrationBuilder.DropTable(
+                name: "SoftwareHistories");
+
+            migrationBuilder.DropTable(
+                name: "Requests");
+
+            migrationBuilder.DropTable(
+                name: "Softwares");
+
+            migrationBuilder.DropTable(
+                name: "Workers");
+
+            migrationBuilder.DropTable(
+                name: "Manufacturers");
+        }
+    }
+}

SmallSoftwareProject/SmallSoftwareDatabase/Migrations/20250417185242_ChangeFieldsInWorker.Designer.cs

@@ -0,0 +1,345 @@
+// <auto-generated />
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+using SmallSoftwareDatabase;
+
+#nullable disable
+
+namespace SmallSoftwareDatabase.Migrations
+{
+    [DbContext(typeof(SmallSoftwareDbContext))]
+    [Migration("20250417185242_ChangeFieldsInWorker")]
+    partial class ChangeFieldsInWorker
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "9.0.2")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.InstallationRequest", b =>
+                {
+                    b.Property<string>("RequestId")
+                        .HasColumnType("text");
+
+                    b.Property<string>("SoftwareId")
+                        .HasColumnType("text");
+
+                    b.Property<int>("Count")
+                        .HasColumnType("integer");
+
+                    b.Property<double>("Price")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("RequestId", "SoftwareId");
+
+                    b.HasIndex("SoftwareId");
+
+                    b.ToTable("InstallationRequests");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Manufacturer", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<string>("ManufacturerName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("PrevManufacturerName")
+                        .HasColumnType("text");
+
+                    b.Property<string>("PrevPrevManufacturerName")
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ManufacturerName")
+                        .IsUnique();
+
+                    b.ToTable("Manufacturers");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Post", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("ChangeDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<bool>("IsActual")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("PostId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("PostName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("PostType")
+                        .HasColumnType("integer");
+
+                    b.Property<double>("Salary")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("PostId", "IsActual")
+                        .IsUnique()
+                        .HasFilter("\"IsActual\" = TRUE");
+
+                    b.HasIndex("PostName", "IsActual")
+                        .IsUnique()
+                        .HasFilter("\"IsActual\" = TRUE");
+
+                    b.ToTable("Posts");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Request", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<string>("Email")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<bool>("IsCancel")
+                        .HasColumnType("boolean");
+
+                    b.Property<DateTime>("RequestDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<double>("Sum")
+                        .HasColumnType("double precision");
+
+                    b.Property<string>("WorkerId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("WorkerId");
+
+                    b.ToTable("Requests");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Salary", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("SalaryDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<string>("WorkerId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<double>("WorkerSalary")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("WorkerId");
+
+                    b.ToTable("Salaries");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Software", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<bool>("IsDeleted")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("ManufacturerId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("PrevPrevSoftwareName")
+                        .HasColumnType("text");
+
+                    b.Property<string>("PrevSoftwareName")
+                        .HasColumnType("text");
+
+                    b.Property<double>("Price")
+                        .HasColumnType("double precision");
+
+                    b.Property<string>("SoftwareName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("SoftwareType")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ManufacturerId");
+
+                    b.HasIndex("SoftwareName", "IsDeleted")
+                        .IsUnique()
+                        .HasFilter("\"IsDeleted\" = FALSE");
+
+                    b.ToTable("Softwares");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.SoftwareHistory", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("ChangeDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<double>("OldPrice")
+                        .HasColumnType("double precision");
+
+                    b.Property<string>("SoftwareId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("SoftwareId");
+
+                    b.ToTable("SoftwareHistories");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Worker", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("BirthDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<string>("Configuration")
+                        .IsRequired()
+                        .HasColumnType("jsonb");
+
+                    b.Property<DateTime?>("DateOfDelete")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<DateTime>("EmploymentDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<string>("FIO")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<bool>("IsDeleted")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("PostId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Workers");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.InstallationRequest", b =>
+                {
+                    b.HasOne("SmallSoftwareDatabase.Models.Request", "Request")
+                        .WithMany("InstallationRequests")
+                        .HasForeignKey("RequestId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("SmallSoftwareDatabase.Models.Software", "Software")
+                        .WithMany("InstallationRequests")
+                        .HasForeignKey("SoftwareId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Request");
+
+                    b.Navigation("Software");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Request", b =>
+                {
+                    b.HasOne("SmallSoftwareDatabase.Models.Worker", "Worker")
+                        .WithMany("Requests")
+                        .HasForeignKey("WorkerId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Worker");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Salary", b =>
+                {
+                    b.HasOne("SmallSoftwareDatabase.Models.Worker", "Worker")
+                        .WithMany("Salaries")
+                        .HasForeignKey("WorkerId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Worker");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Software", b =>
+                {
+                    b.HasOne("SmallSoftwareDatabase.Models.Manufacturer", "Manufacturer")
+                        .WithMany("Softwares")
+                        .HasForeignKey("ManufacturerId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.Navigation("Manufacturer");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.SoftwareHistory", b =>
+                {
+                    b.HasOne("SmallSoftwareDatabase.Models.Software", "Software")
+                        .WithMany("SoftwareHistories")
+                        .HasForeignKey("SoftwareId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Software");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Manufacturer", b =>
+                {
+                    b.Navigation("Softwares");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Request", b =>
+                {
+                    b.Navigation("InstallationRequests");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Software", b =>
+                {
+                    b.Navigation("InstallationRequests");
+
+                    b.Navigation("SoftwareHistories");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Worker", b =>
+                {
+                    b.Navigation("Requests");
+
+                    b.Navigation("Salaries");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

SmallSoftwareProject/SmallSoftwareDatabase/Migrations/20250417185242_ChangeFieldsInWorker.cs

@@ -0,0 +1,40 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace SmallSoftwareDatabase.Migrations
+{
+    /// <inheritdoc />
+    public partial class ChangeFieldsInWorker : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "Configuration",
+                table: "Workers",
+                type: "jsonb",
+                nullable: false,
+                defaultValue: "{\"Rate\": 0, \"Type\": \"PostConfiguration\"}");
+
+            migrationBuilder.AddColumn<DateTime>(
+                name: "DateOfDelete",
+                table: "Workers",
+                type: "timestamp without time zone",
+                nullable: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "Configuration",
+                table: "Workers");
+
+            migrationBuilder.DropColumn(
+                name: "DateOfDelete",
+                table: "Workers");
+        }
+    }
+}

SmallSoftwareProject/SmallSoftwareDatabase/Migrations/SmallSoftwareDbContextModelSnapshot.cs

@@ -0,0 +1,342 @@
+// <auto-generated />
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+using SmallSoftwareDatabase;
+
+#nullable disable
+
+namespace SmallSoftwareDatabase.Migrations
+{
+    [DbContext(typeof(SmallSoftwareDbContext))]
+    partial class SmallSoftwareDbContextModelSnapshot : ModelSnapshot
+    {
+        protected override void BuildModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "9.0.2")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.InstallationRequest", b =>
+                {
+                    b.Property<string>("RequestId")
+                        .HasColumnType("text");
+
+                    b.Property<string>("SoftwareId")
+                        .HasColumnType("text");
+
+                    b.Property<int>("Count")
+                        .HasColumnType("integer");
+
+                    b.Property<double>("Price")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("RequestId", "SoftwareId");
+
+                    b.HasIndex("SoftwareId");
+
+                    b.ToTable("InstallationRequests");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Manufacturer", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<string>("ManufacturerName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("PrevManufacturerName")
+                        .HasColumnType("text");
+
+                    b.Property<string>("PrevPrevManufacturerName")
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ManufacturerName")
+                        .IsUnique();
+
+                    b.ToTable("Manufacturers");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Post", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("ChangeDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<bool>("IsActual")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("PostId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("PostName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("PostType")
+                        .HasColumnType("integer");
+
+                    b.Property<double>("Salary")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("PostId", "IsActual")
+                        .IsUnique()
+                        .HasFilter("\"IsActual\" = TRUE");
+
+                    b.HasIndex("PostName", "IsActual")
+                        .IsUnique()
+                        .HasFilter("\"IsActual\" = TRUE");
+
+                    b.ToTable("Posts");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Request", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<string>("Email")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<bool>("IsCancel")
+                        .HasColumnType("boolean");
+
+                    b.Property<DateTime>("RequestDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<double>("Sum")
+                        .HasColumnType("double precision");
+
+                    b.Property<string>("WorkerId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("WorkerId");
+
+                    b.ToTable("Requests");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Salary", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("SalaryDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<string>("WorkerId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<double>("WorkerSalary")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("WorkerId");
+
+                    b.ToTable("Salaries");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Software", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<bool>("IsDeleted")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("ManufacturerId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("PrevPrevSoftwareName")
+                        .HasColumnType("text");
+
+                    b.Property<string>("PrevSoftwareName")
+                        .HasColumnType("text");
+
+                    b.Property<double>("Price")
+                        .HasColumnType("double precision");
+
+                    b.Property<string>("SoftwareName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("SoftwareType")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ManufacturerId");
+
+                    b.HasIndex("SoftwareName", "IsDeleted")
+                        .IsUnique()
+                        .HasFilter("\"IsDeleted\" = FALSE");
+
+                    b.ToTable("Softwares");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.SoftwareHistory", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("ChangeDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<double>("OldPrice")
+                        .HasColumnType("double precision");
+
+                    b.Property<string>("SoftwareId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("SoftwareId");
+
+                    b.ToTable("SoftwareHistories");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Worker", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("BirthDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<string>("Configuration")
+                        .IsRequired()
+                        .HasColumnType("jsonb");
+
+                    b.Property<DateTime?>("DateOfDelete")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<DateTime>("EmploymentDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<string>("FIO")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<bool>("IsDeleted")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("PostId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Workers");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.InstallationRequest", b =>
+                {
+                    b.HasOne("SmallSoftwareDatabase.Models.Request", "Request")
+                        .WithMany("InstallationRequests")
+                        .HasForeignKey("RequestId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("SmallSoftwareDatabase.Models.Software", "Software")
+                        .WithMany("InstallationRequests")
+                        .HasForeignKey("SoftwareId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Request");
+
+                    b.Navigation("Software");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Request", b =>
+                {
+                    b.HasOne("SmallSoftwareDatabase.Models.Worker", "Worker")
+                        .WithMany("Requests")
+                        .HasForeignKey("WorkerId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Worker");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Salary", b =>
+                {
+                    b.HasOne("SmallSoftwareDatabase.Models.Worker", "Worker")
+                        .WithMany("Salaries")
+                        .HasForeignKey("WorkerId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Worker");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Software", b =>
+                {
+                    b.HasOne("SmallSoftwareDatabase.Models.Manufacturer", "Manufacturer")
+                        .WithMany("Softwares")
+                        .HasForeignKey("ManufacturerId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.Navigation("Manufacturer");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.SoftwareHistory", b =>
+                {
+                    b.HasOne("SmallSoftwareDatabase.Models.Software", "Software")
+                        .WithMany("SoftwareHistories")
+                        .HasForeignKey("SoftwareId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Software");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Manufacturer", b =>
+                {
+                    b.Navigation("Softwares");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Request", b =>
+                {
+                    b.Navigation("InstallationRequests");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Software", b =>
+                {
+                    b.Navigation("InstallationRequests");
+
+                    b.Navigation("SoftwareHistories");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Worker", b =>
+                {
+                    b.Navigation("Requests");
+
+                    b.Navigation("Salaries");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

SmallSoftwareProject/SmallSoftwareDatabase/Models/InstallationRequest.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareDatabase.Models;
+
+internal class InstallationRequest
+{
+    public required string SoftwareId { get; set; } 
+    public required string RequestId { get; set; } 
+    public int Count { get; set; } 
+    public double Price { get; set; }
+    public Request? Request { get; set; }
+    public Software? Software { get; set; }
+
+}

SmallSoftwareProject/SmallSoftwareDatabase/Models/Manufacturer.cs

@@ -0,0 +1,23 @@
+using AutoMapper;
+using SmallSoftwareContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareDatabase.Models;
+
+[AutoMap(typeof(ManufacturerDataModel), ReverseMap = true)]
+internal class Manufacturer
+{
+    public required string Id { get; set; }
+    public required string ManufacturerName { get; set; }
+    public string? PrevManufacturerName { get; set; }
+    public string? PrevPrevManufacturerName { get; set; }
+   
+    [ForeignKey("ManufacturerId")]
+    public List<Software>? Softwares { get; set; }
+
+}

SmallSoftwareProject/SmallSoftwareDatabase/Models/Post.cs

@@ -0,0 +1,14 @@
+using SmallSoftwareContracts.Enums; 
+
+namespace SmallSoftwareDatabase.Models;
+
+internal class Post
+{
+    public string Id { get; set; } = Guid.NewGuid().ToString();
+    public required string PostId { get; set; }
+    public required string PostName { get; set; }
+    public PostType PostType { get; set; }
+    public double Salary { get; set; }
+    public bool IsActual { get; set; }
+    public DateTime ChangeDate { get; set; } 
+}

SmallSoftwareProject/SmallSoftwareDatabase/Models/Request.cs

@@ -0,0 +1,17 @@
+using System.ComponentModel.DataAnnotations.Schema; 
+
+namespace SmallSoftwareDatabase.Models;
+
+internal class Request
+{
+    public string Id { get; set; }  = Guid.NewGuid().ToString();
+    public required string WorkerId { get; set; } 
+    public DateTime RequestDate { get; set; }
+    public required string Email { get; set; } 
+    public double Sum { get; set; }
+    public bool IsCancel { get; set; } 
+    public Worker? Worker { get; set; }
+
+    [ForeignKey("RequestId")]
+    public List<InstallationRequest>? InstallationRequests { get; set; }
+}

SmallSoftwareProject/SmallSoftwareDatabase/Models/Salary.cs

@@ -0,0 +1,11 @@
+namespace SmallSoftwareDatabase.Models;
+
+internal class Salary
+{
+    public string Id { get; set; } = Guid.NewGuid().ToString();
+    public required string WorkerId { get; set; }
+    public double WorkerSalary { get; set; }
+    public DateTime SalaryDate { get; set; } 
+    public Worker? Worker { get; set; }
+}
+

SmallSoftwareProject/SmallSoftwareDatabase/Models/Software.cs

@@ -0,0 +1,24 @@
+using SmallSoftwareContracts.Enums;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace SmallSoftwareDatabase.Models;
+
+internal class Software
+{
+    public required string Id { get; set; } 
+    public required string SoftwareName { get; set; } 
+    public SoftwareType SoftwareType { get; set; } 
+    public required string ManufacturerId { get; set; } 
+    public double Price { get; set; } 
+    public bool IsDeleted { get; set; } 
+    public string? PrevSoftwareName { get; set; }
+    public string? PrevPrevSoftwareName { get; set; } 
+    public Manufacturer? Manufacturer { get; set; }
+
+    [ForeignKey("SoftwareId")]
+    public List<SoftwareHistory>? SoftwareHistories { get; set; }
+
+    [ForeignKey("SoftwareId")]
+    public List<InstallationRequest>? InstallationRequests { get; set; }
+
+}

SmallSoftwareProject/SmallSoftwareDatabase/Models/SoftwareHistory.cs

@@ -0,0 +1,11 @@
+namespace SmallSoftwareDatabase.Models;
+
+internal class SoftwareHistory
+{
+    public string Id { get; set; } = Guid.NewGuid().ToString();
+    public required string SoftwareId { get; set; } 
+    public double OldPrice { get; set; }
+    public DateTime ChangeDate { get; set; } = DateTime.UtcNow;
+
+    public Software? Software { get; set; }
+}