lab5 ready

.gitignore

@@ -10,7 +10,7 @@
 *.user
 *.userosscache
 *.sln.docstates
-
+*.idea
 # User-specific files (MonoDevelop/Xamarin Studio)
 *.userprefs
 
@@ -414,3 +414,4 @@ FodyWeavers.xsd
 # Built Visual Studio Code Extensions
 *.vsix
 
+/.idea/

CandyHouseSolution/CandyHouseBase/CandyHouseBase.csproj

@@ -1,67 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-    <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props"
-            Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')"/>
-    <PropertyGroup>
-        <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
-        <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
-        <ProjectGuid>{5DF70B46-31F7-4D15-8C60-52C0A0A364F0}</ProjectGuid>
-        <OutputType>Exe</OutputType>
-        <AppDesignerFolder>Properties</AppDesignerFolder>
-        <RootNamespace>CandyHouseBase</RootNamespace>
-        <AssemblyName>CandyHouseBase</AssemblyName>
-        <TargetFrameworkVersion>v4.7.1</TargetFrameworkVersion>
-        <FileAlignment>512</FileAlignment>
-        <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
-    </PropertyGroup>
-    <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
-        <PlatformTarget>AnyCPU</PlatformTarget>
-        <DebugSymbols>true</DebugSymbols>
-        <DebugType>full</DebugType>
-        <Optimize>false</Optimize>
-        <OutputPath>bin\Debug\</OutputPath>
-        <DefineConstants>DEBUG;TRACE</DefineConstants>
-        <ErrorReport>prompt</ErrorReport>
-        <WarningLevel>4</WarningLevel>
-    </PropertyGroup>
-    <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
-        <PlatformTarget>AnyCPU</PlatformTarget>
-        <DebugType>pdbonly</DebugType>
-        <Optimize>true</Optimize>
-        <OutputPath>bin\Release\</OutputPath>
-        <DefineConstants>TRACE</DefineConstants>
-        <ErrorReport>prompt</ErrorReport>
-        <WarningLevel>4</WarningLevel>
-    </PropertyGroup>
-    <ItemGroup>
-        <Reference Include="System"/>
-        <Reference Include="System.Core"/>
-        <Reference Include="System.Data"/>
-        <Reference Include="System.Xml"/>
-    </ItemGroup>
-    <ItemGroup>
-        <Compile Include="DataModels\IngredientDataModel.cs" />
-        <Compile Include="DataModels\OrderDataModel.cs" />
-        <Compile Include="DataModels\PekarDataModel.cs" />
-        <Compile Include="DataModels\PekarHistoryDataModel.cs" />
-        <Compile Include="DataModels\PositionDataModel.cs" />
-        <Compile Include="DataModels\ProductDataModel.cs" />
-        <Compile Include="DataModels\RecipeDataModel.cs" />
-        <Compile Include="DataModels\SalaryDataModel.cs" />
-        <Compile Include="Enums\PositionType.cs" />
-        <Compile Include="Enums\StatusType.cs" />
-        <Compile Include="Exceptions\ValidationException.cs" />
-        <Compile Include="Extensions\StringExtensions.cs" />
-        <Compile Include="Infrastructure\IValidation.cs" />
-        <Compile Include="Program.cs" />
-    </ItemGroup>
-    <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets"/>
-    <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
-         Other similar extension points exist, see Microsoft.Common.targets.
-    <Target Name="BeforeBuild">
-    </Target>
-    <Target Name="AfterBuild">
-    </Target>
-    -->
-
-</Project>

CandyHouseSolution/CandyHouseBase/DataModels/IngredientDataModel.cs

@@ -1,31 +0,0 @@
-using CandyHouseBase.Exceptions;
-using CandyHouseBase.Extensions;
-using CandyHouseBase.Infrastructure;
-
-namespace CandyHouseBase.DataModels
-{
-    public class IngredientDataModel : IValidation
-    {
-        public string Id { get; private set; }
-        public string Name { get; private set; }
-        public string Unit { get; private set; }
-        public decimal Cost { get; private set; }
-
-        public IngredientDataModel(string id, string name, string unit, decimal cost)
-        {
-            Id = id;
-            Name = name;
-            Unit = unit;
-            Cost = cost;
-        }
-
-        public void Validate()
-        {
-            if (Id.IsEmpty()) throw new ValidationException("Field Id is empty");
-            if (!Id.IsGuid()) throw new ValidationException("Id must be a GUID");
-            if (Name.IsEmpty()) throw new ValidationException("Field Name is empty");
-            if (Unit.IsEmpty()) throw new ValidationException("Field Unit is empty");
-            if (Cost < 0) throw new ValidationException("Cost must be non-negative");
-        }
-    }
-}

CandyHouseSolution/CandyHouseBase/DataModels/OrderDataModel.cs

@@ -1,46 +0,0 @@
-using System;
-using System.Collections.Generic;
-using CandyHouseBase.Enums;
-using CandyHouseBase.Exceptions;
-using CandyHouseBase.Extensions;
-using CandyHouseBase.Infrastructure;
-
-namespace CandyHouseBase.DataModels
-{
-    public class OrderDataModel : IValidation
-    {
-        public string Id { get; private set; }
-        public string CustomerName { get; private set; } // Может быть null, если клиент разовый
-        public DateTime OrderDate { get; private set; }
-        public decimal TotalAmount { get; private set; }
-        public decimal DiscountAmount { get; private set; }
-        public string OrderId { get; private set; }
-        public string PekarId { get; private set; }
-        public StatusType StatusType { get; private set; }
-
-        public OrderDataModel(string id, string customerName, DateTime orderDate, decimal totalAmount,
-            decimal discountAmount, string orderId, string pekarId, StatusType statusType)
-        {
-            Id = id;
-            CustomerName = customerName;
-            OrderDate = orderDate;
-            TotalAmount = totalAmount;
-            DiscountAmount = discountAmount;
-            OrderId = orderId;
-            PekarId = pekarId;
-            StatusType = statusType;
-        }
-
-        public void Validate()
-        {
-            if (Id.IsEmpty()) throw new ValidationException("Field Id is empty");
-            if (!Id.IsGuid()) throw new ValidationException("Id must be a GUID");
-            if (CustomerName.IsEmpty())
-                throw new ValidationException("CustomerName is empty");
-            if (TotalAmount < 0) throw new ValidationException("TotalAmount cannot be negative");
-            if (DiscountAmount < 0) throw new ValidationException("DiscountAmount cannot be negative");
-            if (OrderId.IsEmpty()) throw new ValidationException("Field OrderId is empty");
-            if (!OrderId.IsGuid()) throw new ValidationException("OrderId must be a GUID");
-        }
-    }
-}

CandyHouseSolution/CandyHouseBase/DataModels/PekarDataModel.cs

@@ -1,42 +0,0 @@
-using System.Collections.Generic;
-using System.Text.RegularExpressions;
-using CandyHouseBase.Exceptions;
-using CandyHouseBase.Infrastructure;
-using CandyHouseBase.Extensions;
-
-namespace CandyHouseBase.DataModels
-{
-    public class PekarDataModel : IValidation
-    {
-        public string Id { get; private set; }
-        public string FIO { get; private set; }
-        public string Position { get; private set; }
-        public decimal BonusCoefficient { get; private set; }
-        public List<ProductDataModel> ProductsItems { get; private set; }
-
-
-        public PekarDataModel(string id, string fio, string position, decimal bonusCoefficient,
-            List<ProductDataModel> productsItems)
-        {
-            Id = id;
-            FIO = fio;
-            Position = position;
-            BonusCoefficient = bonusCoefficient;
-            ProductsItems = productsItems;
-        }
-
-        public void Validate()
-        {
-            if (Id.IsEmpty()) throw new ValidationException("Field Id is empty");
-            if (!Id.IsGuid()) throw new ValidationException("Id must be a GUID");
-            if (FIO.IsEmpty()) throw new ValidationException("Field FIO is empty");
-            var fioPattern = @"^[A-Za-zА-Яа-яЁё\s\-]+$";
-            if (!Regex.IsMatch(FIO, fioPattern))
-                throw new ValidationException("FIO contains invalid characters");
-
-            if (Position.IsEmpty()) throw new ValidationException("Field Position is empty");
-            if (!Position.IsGuid()) throw new ValidationException("Field must be a GUID");
-            if (BonusCoefficient <= 0) throw new ValidationException("BonusCoefficient must be positive");
-        }
-    }
-}

CandyHouseSolution/CandyHouseBase/DataModels/PekarHistoryDataModel.cs

@@ -1,35 +0,0 @@
-using System;
-using CandyHouseBase.Exceptions;
-using CandyHouseBase.Infrastructure;
-using CandyHouseBase.Extensions;
-
-namespace CandyHouseBase.DataModels
-{
-    public class PekarHistoryDataModel : IValidation
-    {
-        public string PekarId { get; private set; }
-        public string FIO { get; private set; }
-        public string PositionId { get; private set; }
-        public DateTime Date { get; private set; }
-        public decimal BonusCoefficient { get; private set; }
-
-        public PekarHistoryDataModel(string peKarId, string fio, string positionId, decimal bonusCoefficient, DateTime dateTime)
-        {
-            PekarId = peKarId;
-            FIO = fio;
-            PositionId = positionId;
-            BonusCoefficient = bonusCoefficient;
-            Date = dateTime;
-        }
-
-        public void Validate()
-        {
-            if (PekarId.IsEmpty()) throw new ValidationException("Field Id is empty");
-            if (!PekarId.IsGuid()) throw new ValidationException("Id must be a GUID");
-            if (FIO.IsEmpty()) throw new ValidationException("Field FIO is empty");
-            if (PositionId.IsEmpty()) throw new ValidationException("Field Position is empty");
-            if (!PositionId.IsGuid()) throw new ValidationException("Field must be a GUID");
-            if (BonusCoefficient <= 0) throw new ValidationException("BonusCoefficient must be positive");
-        }
-    }
-}

CandyHouseSolution/CandyHouseBase/DataModels/PositionDataModel.cs

@@ -1,35 +0,0 @@
-using System;
-using System.Text.RegularExpressions;
-using CandyHouseBase.Enums;
-using CandyHouseBase.Exceptions;
-using CandyHouseBase.Extensions;
-using CandyHouseBase.Infrastructure;
-
-namespace CandyHouseBase.DataModels
-{
-    public class PositionDataModel : IValidation
-    {
-        public string Id { get; set; }
-        public PositionType Type { get; set; }
-        public string Title { get; set; }
-
-        public PositionDataModel(string id, PositionType type, string title)
-        {
-            Id = id;
-            Type = type;
-            Title = title;
-        }
-
-        public void Validate()
-        {
-            if (Id.IsEmpty()) throw new ValidationException("Field Id is empty");
-            if (!Id.IsGuid()) throw new ValidationException("Id must be a GUID");
-            var titlePattern = @"^[A-Za-zА-Яа-яЁё\s\-]+$";
-            if (!Regex.IsMatch(Title, titlePattern))
-                throw new ValidationException("FIO contains invalid characters");
-
-            if (string.IsNullOrEmpty(Title)) throw new ValidationException("Field Title is empty");
-            if (!Enum.IsDefined(typeof(PositionType), Type)) throw new ValidationException("Invalid PositionType");
-        }
-    }
-}

CandyHouseSolution/CandyHouseBase/DataModels/ProductDataModel.cs

@@ -1,58 +0,0 @@
-using System.Collections.Generic;
-using CandyHouseBase.Exceptions;
-using CandyHouseBase.Extensions;
-using CandyHouseBase.Infrastructure;
-
-namespace CandyHouseBase.DataModels
-{
-    public class ProductDataModel : IValidation
-    {
-        public string Id { get; private set; }
-
-        public string Name
-        {
-            get => name;
-            private set
-            {
-                if (!name.IsEmpty()) OldName = name;
-                name = value.Trim();
-            }
-        }
-
-        public string Description
-        {
-            get => description;
-            private set
-            {
-                if (!description.IsEmpty()) OldDescription = description;
-                description = value.Trim();
-            }
-        }
-
-        public string OldName { get; private set; }
-
-        public string OldDescription { get; private set; }
-
-        private string name;
-        private string description;
-        
-        public List<IngredientDataModel> IngredientsItems { get; private set; }
-
-        public ProductDataModel(string id, string name, string description, List<IngredientDataModel> ingredients)
-        {
-            Id = id;
-            Name = name;
-            Description = description;
-            IngredientsItems = ingredients;
-        }
-
-        public void Validate()
-        {
-            if (Id.IsEmpty()) throw new ValidationException("Field Id is empty");
-            if (!Id.IsGuid()) throw new ValidationException("Id must be a GUID");
-            if (Name.IsEmpty()) throw new ValidationException("Field Name is empty");
-            if (Description.IsEmpty()) throw new ValidationException("Field Description is empty");
-            if (IngredientsItems.Count == 0) throw new ValidationException("Field IngredientsItems is empty");
-        }
-    }
-}

CandyHouseSolution/CandyHouseBase/DataModels/RecipeDataModel.cs

@@ -1,27 +0,0 @@
-using CandyHouseBase.Exceptions;
-using CandyHouseBase.Extensions;
-using CandyHouseBase.Infrastructure;
-
-namespace CandyHouseBase.DataModels
-{
-    public class RecipeDataModel : IValidation
-    {
-        public string ProductId { get; private set; }
-        public string IngredientId { get; private set; }
-        public int Quantity { get; private set; }
-
-        public RecipeDataModel(string productId, string ingredientId, int quantity)
-        {
-            ProductId = productId;
-            IngredientId = ingredientId;
-            Quantity = quantity;
-        }
-
-        public void Validate()
-        {
-            if (!ProductId.IsGuid()) throw new ValidationException("ProductId must be a GUID");
-            if (!IngredientId.IsGuid()) throw new ValidationException("IngredientId must be a GUID");
-            if (Quantity <= 0) throw new ValidationException("Quantity must be positive");
-        }
-    }
-}

CandyHouseSolution/CandyHouseBase/DataModels/SalaryDataModel.cs

@@ -1,38 +0,0 @@
-using System;
-using CandyHouseBase.Exceptions;
-using CandyHouseBase.Extensions;
-using CandyHouseBase.Infrastructure;
-
-namespace CandyHouseBase.DataModels
-{
-    public class SalaryDataModel : IValidation
-    {
-        public string Id { get; private set; }
-        public string PekarId { get; private set; }
-        public DateTime Period { get; private set; }
-        public decimal BaseRate { get; private set; }
-        public decimal BonusRate { get; private set; }
-        public decimal TotalSalary { get; private set; }
-
-        public SalaryDataModel(string id, string pekarId, DateTime period, decimal baseRate, decimal bonusRate, decimal totalSalary)
-        {
-            Id = id;
-            PekarId = pekarId;
-            Period = period;
-            BaseRate = baseRate;
-            BonusRate = bonusRate;
-            TotalSalary = totalSalary;
-        }
-
-        public void Validate()
-        {
-            if (Id.IsEmpty()) throw new ValidationException("Field Id is empty");
-            if (!Id.IsGuid()) throw new ValidationException("Id must be a GUID");
-            if (PekarId.IsEmpty()) throw new ValidationException("Field PekarId is empty");
-            if (!PekarId.IsGuid()) throw new ValidationException("PekarId must be a GUID");
-            if (BaseRate < 0) throw new ValidationException("BaseRate cannot be negative");
-            if (BonusRate < 0) throw new ValidationException("BonusRate cannot be negative");
-            if (TotalSalary < 0) throw new ValidationException("TotalSalary cannot be negative");
-        }
-    }
-}

CandyHouseSolution/CandyHouseBase/Enums/PositionType.cs

@@ -1,10 +0,0 @@
-namespace CandyHouseBase.Enums
-{
-    public enum PositionType
-    {
-        None = 1,
-        Small = 2,
-        Medium = 3,
-        Cool = 4,
-    }
-}

CandyHouseSolution/CandyHouseBase/Enums/StatusType.cs

@@ -1,10 +0,0 @@
-namespace CandyHouseBase.Enums
-{
-    public enum StatusType
-    {
-        Pending,
-        Completed,
-        Cancelled,
-        InProgress
-    }
-}

CandyHouseSolution/CandyHouseBase/Exceptions/ValidationException.cs

@@ -1,9 +0,0 @@
-using System;
-
-namespace CandyHouseBase.Exceptions
-{
-    public class ValidationException : Exception
-    {
-        public ValidationException(string message) : base(message) { }
-    }
-}

CandyHouseSolution/CandyHouseBase/Extensions/StringExtensions.cs

@@ -1,10 +0,0 @@
-using System;
-
-namespace CandyHouseBase.Extensions
-{
-    public static class StringExtensions
-    {
-        public static bool IsEmpty(this string str) => string.IsNullOrWhiteSpace(str);
-        public static bool IsGuid(this string str) => Guid.TryParse(str, out _);
-    }
-}

CandyHouseSolution/CandyHouseBase/Infrastructure/IValidation.cs

@@ -1,7 +0,0 @@
-namespace CandyHouseBase.Infrastructure
-{
-    public interface IValidation
-    {
-        void Validate();
-    }
-}

CandyHouseSolution/CandyHouseBase/Program.cs

@@ -1,9 +0,0 @@
-namespace CandyHouseBase
-{
-    public class Program
-    {
-        public static void Main(string[] args)
-        {
-        }
-    }
-}

CandyHouseSolution/CandyHouseBusinessLogic/CandyHouseBusinessLogic.csproj

@@ -0,0 +1,23 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net9.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+    <ItemGroup>
+        <InternalsVisibleTo Include="CandyHouseTests" />
+        <InternalsVisibleTo Include="CandyHouseWebApi" />
+        <InternalsVisibleTo Include="DynamicProxyGenAssembly2" />
+    </ItemGroup>
+    <ItemGroup>
+        <PackageReference Include="DocumentFormat.OpenXml" Version="3.3.0" />
+        <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="9.0.2" />
+        <PackageReference Include="PDFsharp-MigraDoc" Version="6.2.0-preview-3" />
+    </ItemGroup>
+
+    <ItemGroup>
+        <ProjectReference Include="..\CandyHouseContracts\CandyHouseContracts.csproj" />
+    </ItemGroup>
+
+</Project>

CandyHouseSolution/CandyHouseBusinessLogic/Implementations/ClientBusinessLogicContract.cs

@@ -0,0 +1,70 @@
+using System.Text.Json;
+using System.Text.RegularExpressions;
+using CandyHouseContracts.BuisnessLogicContracts;
+using CandyHouseContracts.DataModels;
+using CandyHouseContracts.Exceptions;
+using CandyHouseContracts.Extensions;
+using CandyHouseContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+
+namespace CandyHouseBusinessLogic.Implementations;
+
+public class ClientBusinessLogicContract(IClientStorageContract clientStorageContract, ILogger logger)  : IClientBusinessLogicContract
+{
+    private readonly ILogger _logger = logger;
+    private readonly IClientStorageContract _clientStorageContract = clientStorageContract;
+
+    public List<ClientDataModel> GetAllClients()
+    {
+        _logger.LogInformation("GetAllClients");
+        return _clientStorageContract.GetList() ?? throw new NullListException();
+    }
+
+    public ClientDataModel GetClientByData(string data)
+    {
+        _logger.LogInformation("Get element by data: {data}", data);
+        if (data.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+        if (data.IsGuid())
+        {
+            return _clientStorageContract.GetElementById(data) ?? throw new ElementNotFoundException(data);
+        }
+        if (Regex.IsMatch(data, @"^((8|\+7)[\- ]?)?(\(?\d{3}\)?[\- ]?)?[\d\- ]{7,10}$"))
+        {
+            return _clientStorageContract.GetElementByPhoneNumber(data) ?? throw new ElementNotFoundException(data);
+        }
+        return _clientStorageContract.GetElementByFIO(data) ?? throw new ElementNotFoundException(data);
+    }
+
+    public void InsertClient(ClientDataModel clientDataModel)
+    {
+        _logger.LogInformation("New data: {json}", JsonSerializer.Serialize(clientDataModel));
+        ArgumentNullException.ThrowIfNull(clientDataModel);
+        clientDataModel.Validate();
+        _clientStorageContract.AddElement(clientDataModel);
+    }
+
+    public void UpdateClient(ClientDataModel clientDataModel)
+    {
+        _logger.LogInformation("Update data: {json}", JsonSerializer.Serialize(clientDataModel));
+        ArgumentNullException.ThrowIfNull(clientDataModel);
+        clientDataModel.Validate();
+        _clientStorageContract.UpdElement(clientDataModel);
+    }
+
+    public void DeleteClient(string id)
+    {
+        _logger.LogInformation("Delete by id: {id}", id);
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("Id is not a unique identifier");
+        }
+        _clientStorageContract.DelElement(id);
+    }
+}

CandyHouseSolution/CandyHouseBusinessLogic/Implementations/EmployeeBusinessLogicContract.cs

@@ -0,0 +1,109 @@
+using CandyHouseContracts.BuisnessLogicContracts;
+using CandyHouseContracts.DataModels;
+using CandyHouseContracts.Exceptions;
+using CandyHouseContracts.Extensions;
+using CandyHouseContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Text.Json;
+using System.Text.RegularExpressions;
+using System.Threading.Tasks;
+
+namespace CandyHouseBusinessLogic.Implementations;
+
+public class EmployeeBusinessLogicContract(IEmployeeStorageContract employeeStorageContract, ILogger logger) : IEmployeeBusinessLogicContract
+{
+    private readonly ILogger _logger = logger;
+    private readonly IEmployeeStorageContract _employeeStorageContract = employeeStorageContract;
+
+    public List<EmployeeDataModel> GetAllEmployees(bool onlyActive = true)
+    {
+        _logger.LogInformation("GetAllEmployees params: {onlyActive}", onlyActive);
+        return _employeeStorageContract.GetList(onlyActive) ?? throw new NullListException();
+    }
+
+    public List<EmployeeDataModel> GetAllEmployeesByPost(string postId, bool onlyActive = true)
+    {
+        _logger.LogInformation("GetAllEmployees params: {postId}, {onlyActive},", postId, onlyActive);
+        if (postId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(postId));
+        }
+        if (!postId.IsGuid())
+        {
+            throw new ValidationException("The value in the field postId is not a unique identifier.");
+        }
+        return _employeeStorageContract.GetList(onlyActive, postId) ?? throw new NullListException();
+    }
+
+    public List<EmployeeDataModel> GetAllEmployeesByBirthDate(DateTime fromDate, DateTime toDate, bool onlyActive = true)
+    {
+        _logger.LogInformation("GetAllEmployees params: {onlyActive}, {fromDate}, {toDate}", onlyActive, fromDate, toDate);
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        return _employeeStorageContract.GetList(onlyActive, fromBirthDate: fromDate, toBirthDate: toDate) ?? throw new NullListException();
+    }
+
+    public List<EmployeeDataModel> GetAllEmployeesByEmploymentDate(DateTime fromDate, DateTime toDate, bool onlyActive = true)
+    {
+        _logger.LogInformation("GetAllEmployees params: {onlyActive}, {fromDate}, {toDate}", onlyActive, fromDate, toDate);
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        return _employeeStorageContract.GetList(onlyActive, fromEmploymentDate: fromDate, toEmploymentDate: toDate) ?? throw new NullListException();
+    }
+
+    public EmployeeDataModel GetEmployeeByData(string data)
+    {
+        _logger.LogInformation("Get element by data: {data}", data);
+        if (data.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+        if (data.IsGuid())
+        {
+            return _employeeStorageContract.GetElementById(data) ?? throw new ElementNotFoundException(data);
+        }
+        if (Regex.IsMatch(data, @"^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$"))
+        {
+            return _employeeStorageContract.GetElementByEmail(data) ?? throw new ElementNotFoundException(data);
+        }
+        return _employeeStorageContract.GetElementByFIO(data) ?? throw new ElementNotFoundException(data);
+    }
+
+    public void InsertEmployee(EmployeeDataModel employeeDataModel)
+    {
+        _logger.LogInformation("New data: {json}", JsonSerializer.Serialize(employeeDataModel));
+        ArgumentNullException.ThrowIfNull(employeeDataModel);
+        employeeDataModel.Validate();
+        _employeeStorageContract.AddElement(employeeDataModel);
+    }
+
+    public void UpdateEmployee(EmployeeDataModel employeeDataModel)
+    {
+        _logger.LogInformation("Update data: {json}", JsonSerializer.Serialize(employeeDataModel));
+        ArgumentNullException.ThrowIfNull(employeeDataModel);
+        employeeDataModel.Validate();
+        _employeeStorageContract.UpdElement(employeeDataModel);
+    }
+
+    public void DeleteEmployee(string id)
+    {
+        _logger.LogInformation("Delete by id: {id}", id);
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("Id is not a unique identifier");
+        }
+        _employeeStorageContract.DelElement(id);
+    }
+}

CandyHouseSolution/CandyHouseBusinessLogic/Implementations/PostBusinessLogicContract.cs

@@ -0,0 +1,96 @@
+using CandyHouseContracts.BuisnessLogicContracts;
+using CandyHouseContracts.DataModels;
+using CandyHouseContracts.Exceptions;
+using CandyHouseContracts.Extensions;
+using CandyHouseContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Text.Json;
+using System.Threading.Tasks;
+namespace CandyHouseBusinessLogic.Implementations;
+
+public class PostBusinessLogicContract(IPostStorageContract postStorageContract, ILogger logger) : IPostBusinessLogicContract
+{
+    private readonly ILogger _logger = logger;
+    private readonly IPostStorageContract _postStorageContract = postStorageContract;
+    public List<PostDataModel> GetAllPosts()
+    {
+        _logger.LogInformation("GetAllPosts");
+        return _postStorageContract.GetList() ?? throw new NullListException();
+    }
+
+    public List<PostDataModel> GetAllDataOfPost(string postId)
+    {
+        _logger.LogInformation("GetAllDataOfPost for {postId}", postId);
+        if (postId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(postId));
+        }
+        if (!postId.IsGuid())
+        {
+            throw new ValidationException("The value in the field postId is not a unique identifier.");
+        }
+        return _postStorageContract.GetPostWithHistory(postId) ?? throw new NullListException();
+    }
+
+    public PostDataModel GetPostByData(string data)
+    {
+        _logger.LogInformation("Get element by data: {data}", data);
+        if (data.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+        if (data.IsGuid())
+        {
+            return _postStorageContract.GetElementById(data) ?? throw new ElementNotFoundException(data);
+        }
+        return _postStorageContract.GetElementByName(data) ?? throw new ElementNotFoundException(data);
+    }
+
+    public void InsertPost(PostDataModel postDataModel)
+    {
+        _logger.LogInformation("New data: {json}", JsonSerializer.Serialize(postDataModel));
+        ArgumentNullException.ThrowIfNull(postDataModel);
+        postDataModel.Validate();
+        _postStorageContract.AddElement(postDataModel);
+    }
+
+    public void UpdatePost(PostDataModel postDataModel)
+    {
+        _logger.LogInformation("Update data: {json}", JsonSerializer.Serialize(postDataModel));
+        ArgumentNullException.ThrowIfNull(postDataModel);
+        postDataModel.Validate();
+        _postStorageContract.UpdElement(postDataModel);
+    }
+
+    public void DeletePost(string id)
+    {
+        _logger.LogInformation("Delete by id: {id}", id);
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("Id is not a unique identifier");
+        }
+        _postStorageContract.DelElement(id);
+    }
+
+    public void RestorePost(string id)
+    {
+        _logger.LogInformation("Restore by id: {id}", id);
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("Id is not a unique identifier");
+        }
+        _postStorageContract.ResElement(id);
+    }
+}

CandyHouseSolution/CandyHouseBusinessLogic/Implementations/ProductBusinessLogicContract.cs

@@ -0,0 +1,84 @@
+using CandyHouseContracts.BuisnessLogicContracts;
+using CandyHouseContracts.DataModels;
+using CandyHouseContracts.Exceptions;
+using CandyHouseContracts.Extensions;
+using CandyHouseContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Text.Json;
+using System.Threading.Tasks;
+using CandyHouseContracts.BusinessLogicContracts;
+
+namespace CandyHouseBusinessLogic.Implementations;
+
+public class ProductBusinessLogicContract(IProductStorageContract productStorageContract, ILogger logger) : IProductBusinessLogicContract
+{
+    private readonly ILogger _logger = logger;
+    private readonly IProductStorageContract _productStorageContract = productStorageContract;
+    public List<ProductDataModel> GetAllProducts()
+    {
+        _logger.LogInformation("GetAllProducts");
+        return _productStorageContract.GetList() ?? throw new NullListException();
+    }
+
+    public List<ProductHistoryDataModel> GetProductHistoryByProduct(string productId)
+    {
+        _logger.LogInformation("GetProductHistoryByProduct for {productId}", productId);
+        if (productId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(productId));
+        }
+        if (!productId.IsGuid())
+        {
+            throw new ValidationException("The value in the field productId is not a unique identifier.");
+        }
+        return _productStorageContract.GetHistoryByProductId(productId) ?? throw new NullListException();
+    }
+
+    public ProductDataModel GetProductByData(string data)
+    {
+        _logger.LogInformation("Get element by data: {data}", data);
+        if (data.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+        if (data.IsGuid())
+        {
+            return _productStorageContract.GetElementById(data) ?? throw new ElementNotFoundException(data);
+        }
+        return _productStorageContract.GetElementByName(data) ?? throw new ElementNotFoundException(data);
+    }
+
+    public void InsertProduct(ProductDataModel productDataModel)
+    {
+        _logger.LogInformation("New data: {json}", JsonSerializer.Serialize(productDataModel));
+        ArgumentNullException.ThrowIfNull(productDataModel);
+        productDataModel.Validate();
+        _productStorageContract.AddElement(productDataModel);
+    }
+
+    public void UpdateProduct(ProductDataModel productDataModel)
+    {
+        _logger.LogInformation("Update data: {json}", JsonSerializer.Serialize(productDataModel));
+        ArgumentNullException.ThrowIfNull(productDataModel);
+        productDataModel.Validate();
+        _productStorageContract.UpdElement(productDataModel);
+    }
+
+    public void DeleteProduct(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");
+        }
+        _productStorageContract.DelElement(id);
+    }
+}

CandyHouseSolution/CandyHouseBusinessLogic/Implementations/ReportContract.cs

@@ -0,0 +1,165 @@
+using CandyHouseBusinessLogic.OfficePackage;
+using CandyHouseContracts.BusinessLogicContracts;
+using CandyHouseContracts.DataModels;
+using CandyHouseContracts.Exceptions;
+using CandyHouseContracts.Extensions;
+using CandyHouseContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+
+namespace CandyHouseBusinessLogic.Implementations;
+
+internal class ReportContract(
+    IProductStorageContract productStorageContract,
+    ISaleStorageContract saleStorageContract,
+    IClientDiscountStorageContract clientDiscountStorageContract,
+    BaseWordBuilder baseWordBuilder,
+    BaseExcelBuilder baseExcelBuilder,
+    BasePdfBuilder basePdfBuilder,
+    ILogger logger) : IReportContract
+{
+    private readonly IProductStorageContract _productStorageContract = productStorageContract;
+
+    private readonly ISaleStorageContract _saleStorageContract = saleStorageContract;
+
+    private readonly IClientDiscountStorageContract _clientDiscountStorageContract = clientDiscountStorageContract;
+
+    private readonly BaseWordBuilder _baseWordBuilder = baseWordBuilder;
+
+    private readonly BaseExcelBuilder _baseExcelBuilder = baseExcelBuilder;
+
+    private readonly BasePdfBuilder _basePdfBuilder = basePdfBuilder;
+
+    private readonly ILogger _logger = logger;
+
+    internal static readonly string[] documentHeader = ["Продукт", "Цена", "Дата"];
+
+    internal static readonly string[] tableHeader = ["Дата", "Сумма", "Скидка", "Продавец", "Товар", "Кол-во"];
+
+    public async Task<Stream> CreateDocumentProductHistoryPricesAsync(CancellationToken ct)
+    {
+        _logger.LogInformation("Create report ProductHistoryPrices");
+        var data = await GetDataByHistoryPricesAsync(ct);
+        return _baseWordBuilder
+            .AddHeader("История цен на продукцию")
+            .AddParagraph($"Сформировано на дату {DateTime.UtcNow}")
+            .AddTable([3000, 5000, 4000],
+            [
+                .. new List<string[]>() { documentHeader }.Union([
+                    .. data.SelectMany(x =>
+                        (new List<string[]>() { new string[] { x.ProductName, "", "" } }).Union(x.Prices.Select(y =>
+                            new string[] { "", y.Split(" (")[0], y.Split(" (")[1].TrimEnd(')') })))
+                ])
+            ])
+            .Build();
+    }
+
+    public async Task<Stream> CreateDocumentSalesByPeriodAsync(DateTime dateStart, DateTime dateFinish,
+        CancellationToken ct)
+    {
+        _logger.LogInformation("Create report SalesByPeriod from {dateStart} to {dateFinish}", dateStart, dateFinish);
+        var data = await GetDataBySalesAsync(dateStart, dateFinish, ct) ??
+                   throw new InvalidOperationException("No found data");
+        return _baseExcelBuilder
+            .AddHeader("Продажи за период", 0, 6)
+            .AddParagraph($"c {dateStart.ToShortDateString()} по {dateFinish.ToShortDateString()}", 2)
+            .AddTable([10, 10, 10, 10, 10, 10],
+            [
+                .. new List<string[]>() { tableHeader }.Union(data.SelectMany(x =>
+                    (new List<string[]>()
+                    {
+                        new string[]
+                        {
+                            x.SaleDate.ToShortDateString(), x.Sum.ToString("N2"), x.Discount.ToString("N2"),
+                            x.EmployeeFIO, "", ""
+                        }
+                    }).Union(x.Products!.Select(y => new string[]
+                        { "", "", "", "", y.ProductName, y.Count.ToString("N2") })).ToArray())).Union([
+                    ["Всего", data.Sum(x => x.Sum).ToString("N2"), data.Sum(x => x.Discount).ToString("N2"), "", "", ""]
+                ])
+            ])
+            .Build();
+    }
+
+    public async Task<Stream> CreateDocumentClientDiscountByPeriodAsync(DateTime dateStart, DateTime dateFinish,
+        CancellationToken ct)
+    {
+        _logger.LogInformation("Create report ClientDiscountByPeriod from {dateStart} to {dateFinish}", dateStart,
+            dateFinish);
+        var data = await GetDataByClientDiscountAsync(dateStart, dateFinish, ct) ??
+                   throw new InvalidOperationException("No found data");
+        return _basePdfBuilder
+            .AddHeader("Скидочная ведомость")
+            .AddParagraph($"за период с {dateStart.ToShortDateString()} по {dateFinish.ToShortDateString()}")
+            .AddPieChart("Начисления", [.. data.Select(x => (x.ClientFIO, x.TotalDiscount))])
+            .Build();
+    }
+
+    public Task<List<ProductHistoryPricesDataModel>> GetDataProductHistoryPricesAsync(CancellationToken ct)
+    {
+        _logger.LogInformation("Get data ProductHistoryPrices");
+        return GetDataByHistoryPricesAsync(ct);
+    }
+
+    public Task<List<SaleDataModel>> GetDataSaleByPeriodAsync(DateTime dateStart, DateTime dateFinish,
+        CancellationToken ct)
+    {
+        _logger.LogInformation("Get data SalesByPeriod from {dateStart} to {dateFinish}", dateStart, dateFinish);
+        return GetDataBySalesAsync(dateStart, dateFinish, ct);
+    }
+
+    public Task<List<ClientDiscountByPeriodDataModel>> GetDataClientDiscountByPeriodAsync(DateTime dateStart,
+        DateTime dateFinish, CancellationToken ct)
+    {
+        _logger.LogInformation("Get data ClientDiscountByPeriod from {dateStart} to {dateFinish}", dateStart,
+            dateFinish);
+        return GetDataByClientDiscountAsync(dateStart, dateFinish, ct);
+    }
+
+    private async Task<List<ProductHistoryPricesDataModel>> GetDataByHistoryPricesAsync(CancellationToken ct) =>
+    [
+        .. (await _productStorageContract.GetListAsync(ct))
+        .Select(async product => new
+        {
+            ProductName = product.ProductName,
+            History = await Task.Run(() => _productStorageContract.GetHistoryByProductId(product.Id))
+        }).Select(t => t.Result).Select(x => new ProductHistoryPricesDataModel
+        {
+            ProductName = x.ProductName,
+            Prices =
+            [
+                .. x.History.OrderByDescending(h => h.ChangeDate)
+                    .Select(h => $"{h.OldPrice:N2} ({h.ChangeDate:dd.MM.yyyy})")
+            ]
+        })
+    ];
+
+    private async Task<List<SaleDataModel>> GetDataBySalesAsync(DateTime dateStart, DateTime dateFinish,
+        CancellationToken ct)
+    {
+        if (dateStart.IsDateNotOlder(dateFinish))
+        {
+            throw new IncorrectDatesException(dateStart, dateFinish);
+        }
+
+        return [.. (await _saleStorageContract.GetListAsync(dateStart, dateFinish, ct)).OrderBy(x => x.SaleDate)];
+    }
+
+    private async Task<List<ClientDiscountByPeriodDataModel>> GetDataByClientDiscountAsync(DateTime dateStart,
+        DateTime dateFinish, CancellationToken ct)
+    {
+        if (dateStart.IsDateNotOlder(dateFinish))
+        {
+            throw new IncorrectDatesException(dateStart, dateFinish);
+        }
+
+        return
+        [
+            .. (await _clientDiscountStorageContract.GetListAsync(dateStart, dateFinish, ct)).GroupBy(x => x.ClientFIO)
+            .Select(x => new ClientDiscountByPeriodDataModel
+            {
+                ClientFIO = x.Key, TotalDiscount = x.Sum(y => y.DiscountAmount),
+                FromPeriod = x.Min(y => y.DiscountDate), ToPeriod = x.Max(y => y.DiscountDate)
+            }).OrderBy(x => x.ClientFIO)
+        ];
+    }
+}

CandyHouseSolution/CandyHouseBusinessLogic/Implementations/SalaryBusinessLogicContract.cs

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

CandyHouseSolution/CandyHouseBusinessLogic/Implementations/SaleBusinessLogicContract.cs

@@ -0,0 +1,120 @@
+using CandyHouseContracts.BuisnessLogicContracts;
+using CandyHouseContracts.DataModels;
+using CandyHouseContracts.Exceptions;
+using CandyHouseContracts.Extensions;
+using CandyHouseContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Text.Json;
+using System.Threading.Tasks;
+
+namespace CandyHouseBusinessLogic.Implementations;
+
+public class SaleBusinessLogicContract(ISaleStorageContract saleStorageContract, ILogger logger) : ISaleBusinessLogicContract
+{
+    private readonly ILogger _logger = logger;
+    private readonly ISaleStorageContract _saleStorageContract = saleStorageContract;
+
+    public List<SaleDataModel> GetAllSalesByPeriod(DateTime fromDate, DateTime toDate)
+    {
+        _logger.LogInformation("GetAllSales params: {fromDate}, {toDate}", fromDate, toDate);
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        return _saleStorageContract.GetList(fromDate, toDate) ?? throw new NullListException();
+    }
+
+    public List<SaleDataModel> GetAllSalesByEmployeeByPeriod(string employeeId, DateTime fromDate, DateTime toDate)
+    {
+        _logger.LogInformation("GetAllSales params: {employeeId}, {fromDate}, {toDate}", employeeId, fromDate, toDate);
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        if (employeeId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(employeeId));
+        }
+        if (!employeeId.IsGuid())
+        {
+            throw new ValidationException("The value in the field employeeId is not a unique identifier.");
+        }
+        return _saleStorageContract.GetList(fromDate, toDate, employeeId: employeeId) ?? throw new NullListException();
+    }
+
+    public List<SaleDataModel> GetAllSalesByClientByPeriod(string clientId, DateTime fromDate, DateTime toDate)
+    {
+        _logger.LogInformation("GetAllSales params: {clientId}, {fromDate}, {toDate}", clientId, fromDate, toDate);
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        if (clientId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(clientId));
+        }
+        if (!clientId.IsGuid())
+        {
+            throw new ValidationException("The value in the field clientId is not a unique identifier.");
+        }
+        return _saleStorageContract.GetList(fromDate, toDate, clientId: clientId) ?? throw new NullListException();
+    }
+
+    public List<SaleDataModel> GetAllSalesByProductByPeriod(string productId, DateTime fromDate, DateTime toDate)
+    {
+        _logger.LogInformation("GetAllSales params: {productId}, {fromDate}, {toDate}", productId, fromDate, toDate);
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        if (productId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(productId));
+        }
+        if (!productId.IsGuid())
+        {
+            throw new ValidationException("The value in the field productId is not a unique identifier.");
+        }
+        return _saleStorageContract.GetList(fromDate, toDate, productId: productId) ?? throw new NullListException();
+    }
+
+    public SaleDataModel GetSaleByData(string data)
+    {
+        _logger.LogInformation("Get element by data: {data}", data);
+        if (data.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+        if (!data.IsGuid())
+        {
+            throw new ValidationException("Id is not a unique identifier");
+        }
+        return _saleStorageContract.GetElementById(data) ?? throw new ElementNotFoundException(data);
+    }
+
+    public void InsertSale(SaleDataModel saleDataModel)
+    {
+        _logger.LogInformation("New data: {json}", JsonSerializer.Serialize(saleDataModel));
+        ArgumentNullException.ThrowIfNull(saleDataModel);
+        saleDataModel.Validate();
+        _saleStorageContract.AddElement(saleDataModel);
+    }
+
+    public void CancelSale(string id)
+    {
+        _logger.LogInformation("Cancel by id: {id}", id);
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("Id is not a unique identifier");
+        }
+        _saleStorageContract.DelElement(id);
+    }
+}

CandyHouseSolution/CandyHouseBusinessLogic/OfficePackage/BaseExcelBuilder.cs

@@ -0,0 +1,12 @@
+namespace CandyHouseBusinessLogic.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();
+}

CandyHouseSolution/CandyHouseBusinessLogic/OfficePackage/BasePdfBuilder.cs

@@ -0,0 +1,12 @@
+namespace CandyHouseBusinessLogic.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();
+}

CandyHouseSolution/CandyHouseBusinessLogic/OfficePackage/BaseWordBuilder.cs

@@ -0,0 +1,12 @@
+namespace CandyHouseBusinessLogic.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();
+}

CandyHouseSolution/CandyHouseBusinessLogic/OfficePackage/MigraDocPdfBuilder.cs

@@ -0,0 +1,85 @@
+using MigraDoc.DocumentObjectModel;
+using MigraDoc.DocumentObjectModel.Shapes.Charts;
+using MigraDoc.Rendering;
+using System.Text;
+
+namespace CandyHouseBusinessLogic.OfficePackage;
+
+internal 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 style = _document.Styles.AddStyle("NormalBold", "Normal");
+        style.Font.Bold = true;
+    }
+}

CandyHouseSolution/CandyHouseBusinessLogic/OfficePackage/OpenXmlExcelBuilder.cs

@@ -0,0 +1,304 @@
+using CandyHouseBusinessLogic.OfficePackage;
+using DocumentFormat.OpenXml.Packaging;
+using DocumentFormat.OpenXml.Spreadsheet;
+using DocumentFormat.OpenXml;
+
+namespace CandyHouseBusinessLogic.OfficePackage;
+
+internal 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.BoldTextWithoutBorder);
+        for (int i = startIndex + 1; i < startIndex + count; ++i)
+        {
+            CreateCell(i, _rowIndex, "", StyleIndex.SimpleTextWithoutBorder);
+        }
+
+        _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.BoldTextWithBorder);
+        }
+
+        _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.SimpleTextWithBorder);
+            }
+
+            _rowIndex++;
+        }
+
+        for (var j = 0; j < data.Last().Length; ++j)
+        {
+            CreateCell(j, _rowIndex, data.Last()[j], StyleIndex.BoldTextWithBorder);
+        }
+
+        _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);
+
+        // Default Fill
+        var fills = new Fills() { Count = 1 };
+        fills.Append(new Fill
+        {
+            PatternFill = new PatternFill() { PatternType = new EnumValue<PatternValues>(PatternValues.None) }
+        });
+        workbookStylesPart.Stylesheet.Append(fills);
+
+        // Default Border
+        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 }
+        });
+        workbookStylesPart.Stylesheet.Append(borders);
+
+        // Default cell format and a date cell format
+        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.Center,
+                Vertical = VerticalAlignmentValues.Center,
+                WrapText = true
+            }
+        });
+        cellFormats.Append(new CellFormat
+        {
+            NumberFormatId = 0,
+            FormatId = 0,
+            FontId = 1,
+            BorderId = 1,
+            FillId = 0,
+            Alignment = new Alignment()
+            {
+                Horizontal = HorizontalAlignmentValues.Center,
+                Vertical = VerticalAlignmentValues.Center,
+                WrapText = true
+            }
+        });
+        workbookStylesPart.Stylesheet.Append(cellFormats);
+    }
+
+    private enum StyleIndex
+    {
+        SimpleTextWithoutBorder = 0,
+        SimpleTextWithBorder = 1,
+        BoldTextWithoutBorder = 2,
+        BoldTextWithBorder = 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;
+    }
+}

CandyHouseSolution/CandyHouseBusinessLogic/OfficePackage/OpenXmlWordBuilder.cs

@@ -0,0 +1,94 @@
+using DocumentFormat.OpenXml.Packaging;
+using DocumentFormat.OpenXml.Wordprocessing;
+using DocumentFormat.OpenXml;
+
+namespace CandyHouseBusinessLogic.OfficePackage;
+
+internal 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());
+        run.AppendChild(new RunProperties(new Bold()));
+        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 }
+            )
+        ));
+
+        // Заголовок
+        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);
+
+        // Данные
+        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;
+    }
+}

CandyHouseSolution/CandyHouseContracts/AdapterContracts/IClientAdapter.cs

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

CandyHouseSolution/CandyHouseContracts/AdapterContracts/IEmployeeAdapter.cs

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

CandyHouseSolution/CandyHouseContracts/AdapterContracts/IPostAdapter.cs

@@ -0,0 +1,26 @@
+using CandyHouseContracts.AdapterContracts.OperationResponses;
+using CandyHouseContracts.BindingModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.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);
+}

CandyHouseSolution/CandyHouseContracts/AdapterContracts/IProductAdapter.cs

@@ -0,0 +1,24 @@
+using CandyHouseContracts.AdapterContracts.OperationResponses;
+using CandyHouseContracts.BindingModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.AdapterContracts;
+
+public interface IProductAdapter
+{
+    ProductOperationResponse GetList(bool includeDeleted);
+
+    ProductOperationResponse GetHistory(string id);
+
+    ProductOperationResponse GetElement(string data);
+
+    ProductOperationResponse RegisterProduct(ProductBindingModel productModel);
+
+    ProductOperationResponse ChangeProductInfo(ProductBindingModel productModel);
+
+    ProductOperationResponse RemoveProduct(string id);
+}

CandyHouseSolution/CandyHouseContracts/AdapterContracts/IReportAdapter.cs

@@ -0,0 +1,18 @@
+using CandyHouseContracts.AdapterContracts.OperationResponses;
+
+namespace CandyHouseContracts.AdapterContracts;
+
+public interface IReportAdapter
+{
+    Task<ReportOperationResponse> GetDataProductHistoryPricesAsync(CancellationToken ct);
+
+    Task<ReportOperationResponse> GetDataSaleByPeriodAsync(DateTime dateStart, DateTime dateFinish, CancellationToken ct);
+
+    Task<ReportOperationResponse> GetDataClientDiscountByPeriodAsync(DateTime dateStart, DateTime dateFinish, CancellationToken ct);
+
+    Task<ReportOperationResponse> CreateDocumentProductHistoryPricesAsync(CancellationToken ct);
+
+    Task<ReportOperationResponse> CreateDocumentSalesByPeriodAsync(DateTime dateStart, DateTime dateFinish, CancellationToken ct);
+
+    Task<ReportOperationResponse> CreateDocumentClientDiscountByPeriodAsync(DateTime dateStart, DateTime dateFinish, CancellationToken ct);
+}

CandyHouseSolution/CandyHouseContracts/AdapterContracts/ISalaryAdapter.cs

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

CandyHouseSolution/CandyHouseContracts/AdapterContracts/ISaleAdapter.cs

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

CandyHouseSolution/CandyHouseContracts/AdapterContracts/OperationResponses/ClientOperationResponse.cs

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

CandyHouseSolution/CandyHouseContracts/AdapterContracts/OperationResponses/EmployeeOperationResponse.cs

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

CandyHouseSolution/CandyHouseContracts/AdapterContracts/OperationResponses/PostOperationResponse.cs

@@ -0,0 +1,24 @@
+using CandyHouseContracts.Infrastructure;
+using CandyHouseContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.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);
+}

CandyHouseSolution/CandyHouseContracts/AdapterContracts/OperationResponses/ProductOperationResponse.cs

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

CandyHouseSolution/CandyHouseContracts/AdapterContracts/OperationResponses/ReportOperationResponse.cs

@@ -0,0 +1,19 @@
+using CandyHouseContracts.Infrastructure;
+using CandyHouseContracts.ViewModels;
+
+namespace CandyHouseContracts.AdapterContracts.OperationResponses;
+
+public class ReportOperationResponse : OperationResponse
+{
+    public static ReportOperationResponse OK(List<ProductHistoryPricesViewModel> data) => OK<ReportOperationResponse, List<ProductHistoryPricesViewModel>>(data);
+
+    public static ReportOperationResponse OK(List<SaleViewModel> data) => OK<ReportOperationResponse, List<SaleViewModel>>(data);
+
+    public static ReportOperationResponse OK(List<ClientDiscountByPeriodViewModel> data) => OK<ReportOperationResponse, List<ClientDiscountByPeriodViewModel>>(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);
+}

CandyHouseSolution/CandyHouseContracts/AdapterContracts/OperationResponses/SalaryOperationResponse.cs

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

CandyHouseSolution/CandyHouseContracts/AdapterContracts/OperationResponses/SaleOperationResponse.cs

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

CandyHouseSolution/CandyHouseContracts/BindingModels/ClientBindingModel.cs

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

CandyHouseSolution/CandyHouseContracts/BindingModels/EmployeeBindingModel.cs

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

CandyHouseSolution/CandyHouseContracts/BindingModels/PostBindingModel.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.BindingModels;
+
+public class PostBindingModel
+{
+    public string? Id { get; set; }
+
+    public string? PostId => Id;
+
+    public string? PostName { get; set; }
+
+    public string? PostType { get; set; }
+    public string? ConfigurationJson { get; set; }
+}

CandyHouseSolution/CandyHouseContracts/BindingModels/ProductBindingModel.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.BindingModels;
+
+public class ProductBindingModel
+{
+    public string? Id { get; set; }
+    public string? ProductName { get; set; }
+    public string? ProductDescription { get; set; }
+    public double Price { get; set; }
+    public string? ProductType { get; set; }
+}

CandyHouseSolution/CandyHouseContracts/BindingModels/SaleBindingModel.cs

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

CandyHouseSolution/CandyHouseContracts/BindingModels/SaleProductBindingModel.cs

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

CandyHouseSolution/CandyHouseContracts/BusinessLogicContracts/IClientBusinessLogicContract.cs

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

CandyHouseSolution/CandyHouseContracts/BusinessLogicContracts/IEmployeeBusinessLogicContract.cs

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

CandyHouseSolution/CandyHouseContracts/BusinessLogicContracts/IPostBusinessLogicContract.cs

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

CandyHouseSolution/CandyHouseContracts/BusinessLogicContracts/IProductBusinessLogicContract.cs

@@ -0,0 +1,18 @@
+using CandyHouseContracts.DataModels;
+
+namespace CandyHouseContracts.BusinessLogicContracts;
+
+public interface IProductBusinessLogicContract
+{
+    List<ProductDataModel> GetAllProducts();
+
+    List<ProductHistoryDataModel> GetProductHistoryByProduct(string productId);
+
+    ProductDataModel GetProductByData(string data);
+
+    void InsertProduct(ProductDataModel productDataModel);
+
+    void UpdateProduct(ProductDataModel productDataModel);
+
+    void DeleteProduct(string id);
+}

CandyHouseSolution/CandyHouseContracts/BusinessLogicContracts/IReportContract.cs

@@ -0,0 +1,19 @@
+using CandyHouseContracts.DataModels;
+
+namespace CandyHouseContracts.BusinessLogicContracts;
+
+
+public interface IReportContract
+{
+    Task<List<ProductHistoryPricesDataModel>> GetDataProductHistoryPricesAsync(CancellationToken ct);
+
+    Task<List<SaleDataModel>> GetDataSaleByPeriodAsync(DateTime dateStart, DateTime dateFinish, CancellationToken ct);
+
+    Task<List<ClientDiscountByPeriodDataModel>> GetDataClientDiscountByPeriodAsync(DateTime dateStart, DateTime dateFinish, CancellationToken ct);
+
+    Task<Stream> CreateDocumentProductHistoryPricesAsync(CancellationToken ct);
+
+    Task<Stream> CreateDocumentSalesByPeriodAsync(DateTime dateStart, DateTime dateFinish, CancellationToken ct);
+
+    Task<Stream> CreateDocumentClientDiscountByPeriodAsync(DateTime dateStart, DateTime dateFinish, CancellationToken ct);
+}

CandyHouseSolution/CandyHouseContracts/BusinessLogicContracts/ISalaryBusinessLogicContract.cs

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

CandyHouseSolution/CandyHouseContracts/BusinessLogicContracts/ISaleBusinessLogicContract.cs

@@ -0,0 +1,25 @@
+using CandyHouseContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.BuisnessLogicContracts;
+
+public interface ISaleBusinessLogicContract
+{
+    List<SaleDataModel> GetAllSalesByPeriod(DateTime fromDate, DateTime toDate);
+
+    List<SaleDataModel> GetAllSalesByEmployeeByPeriod(string employeeId, DateTime fromDate, DateTime toDate);
+
+    List<SaleDataModel> GetAllSalesByClientByPeriod(string clientId, DateTime fromDate, DateTime toDate);
+
+    List<SaleDataModel> GetAllSalesByProductByPeriod(string productId, DateTime fromDate, DateTime toDate);
+
+    SaleDataModel GetSaleByData(string data);
+
+    void InsertSale(SaleDataModel saleDataModel);
+
+    void CancelSale(string id);
+}

CandyHouseSolution/CandyHouseContracts/CandyHouseContracts.csproj

@@ -0,0 +1,15 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net9.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <PackageReference Include="Microsoft.AspNetCore.Http.Abstractions" Version="2.3.0" />
+        <PackageReference Include="Microsoft.AspNetCore.Mvc.Abstractions" Version="2.3.0" />
+        <PackageReference Include="Microsoft.AspNetCore.Mvc.Core" Version="2.3.0" />
+    </ItemGroup>
+
+</Project>

CandyHouseSolution/CandyHouseContracts/DataModels/ClientDataModel.cs

@@ -0,0 +1,42 @@
+using CandyHouseContracts.Extensions;
+using CandyHouseContracts.Exceptions;
+using CandyHouseContracts.Infrastructure;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using System.Text;
+using System.Text.RegularExpressions;
+using System.Threading.Tasks;
+using ValidationException = CandyHouseContracts.Exceptions.ValidationException;
+
+namespace CandyHouseContracts.DataModels;
+
+public class ClientDataModel(string id, string fIO, string phoneNumber, double discountSize) : IValidation
+{
+    public string Id { get; private set; } = id;
+
+    public string FIO { get; private set; } = fIO;
+
+    public string PhoneNumber { get; private set; } = phoneNumber;
+
+    public double DiscountSize { get; private set; } = discountSize;
+
+    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 (FIO.IsEmpty())
+            throw new ValidationException("Field FIO is empty");
+
+        if (PhoneNumber.IsEmpty())
+            throw new ValidationException("Field PhoneNumber is empty");
+
+        if (!Regex.IsMatch(PhoneNumber, @"^((8|\+7)[\- ]?)?(\(?\d{3}\)?[\- ]?)?[\d\- ]{7,10}$"))
+            throw new ValidationException("Field PhoneNumber is not a phone number");
+    }
+}

CandyHouseSolution/CandyHouseContracts/DataModels/ClientDiscountByPeriodDataModel.cs

@@ -0,0 +1,12 @@
+namespace CandyHouseContracts.DataModels;
+
+public class ClientDiscountByPeriodDataModel
+{
+    public required string ClientFIO { get; set; }
+
+    public double TotalDiscount { get; set; }
+
+    public DateTime FromPeriod { get; set; }
+
+    public DateTime ToPeriod { get; set; }
+}

CandyHouseSolution/CandyHouseContracts/DataModels/ClientDiscountDataModel.cs

@@ -0,0 +1,35 @@
+using CandyHouseContracts.Exceptions;
+using CandyHouseContracts.Extensions;
+using CandyHouseContracts.Infrastructure;
+
+namespace CandyHouseContracts.DataModels;
+
+public class ClientDiscountDataModel(string clientId, DateTime discountDate, double discountAmount) : IValidation
+{
+    private readonly ClientDataModel? _client;
+
+    public string ClientId { get; private set; } = clientId;
+
+    public DateTime DiscountDate { get; private set; } = discountDate;
+
+    public double DiscountAmount { get; private set; } = discountAmount;
+
+    public string ClientFIO => _client?.FIO ?? string.Empty;
+
+    public ClientDiscountDataModel(string clientId, DateTime discountDate, double discountAmount, ClientDataModel client) : this(clientId, discountDate, discountAmount)
+    {
+        _client = client;
+    }
+
+    public void Validate()
+    {
+        if (ClientId.IsEmpty())
+            throw new ValidationException("Field ClientId is empty");
+
+        if (!ClientId.IsGuid())
+            throw new ValidationException("The value in the field ClientId is not a unique identifier");
+
+        if (DiscountAmount < 0)
+            throw new ValidationException("Field DiscountAmount in the field is less than 0");
+    }
+}

CandyHouseSolution/CandyHouseContracts/DataModels/EmployeeDataModel.cs

@@ -0,0 +1,70 @@
+using CandyHouseContracts.Exceptions;
+using CandyHouseContracts.Extensions;
+using CandyHouseContracts.Infrastructure;
+
+using System.Text.RegularExpressions;
+
+namespace CandyHouseContracts.DataModels;
+
+public class EmployeeDataModel(string id, string fio, string email, string postId, DateTime birthDate, DateTime employmentDate, bool isDeleted) : IValidation
+{
+    private readonly PostDataModel? _post;
+
+    public string Id { get; private set; } = id;
+
+    public string FIO { get; private set; } = fio;
+
+    public string Email { get; private set; } = email;
+
+    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 EmployeeDataModel(string id, string fio, string email, string postId, DateTime birthDate, DateTime employmentDate, 
+        bool isDeleted, PostDataModel post) : this(id, fio, email, postId, birthDate, employmentDate, isDeleted)
+    {
+        _post = post;
+    }
+
+    public EmployeeDataModel(string id, string fio, string email, string postId, DateTime birthDate, 
+        DateTime employmentDate) : this(id, fio, email, postId, birthDate, employmentDate, false) { }
+
+    public void Validate()
+    {
+        if (Id.IsEmpty())
+            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 (FIO.IsEmpty())
+            throw new ValidationException("Field FIO is empty");
+
+        if (Email.IsEmpty())
+            throw new ValidationException("Field Email is empty");
+
+        if (!Regex.IsMatch(Email, @"^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$"))
+            throw new ValidationException("Field Email is not a valid email address");
+
+        if (PostId.IsEmpty())
+            throw new ValidationException("Field PostId is empty");
+
+        if (!PostId.IsGuid())
+            throw new ValidationException("The value in the field PostId is not a unique identifier");
+
+        if (BirthDate.Date > DateTime.UtcNow.AddYears(-18).Date)
+            throw new ValidationException($"Only adults can be hired (BirthDate = {BirthDate.ToShortDateString()})");
+
+        if (EmploymentDate.Date < BirthDate.Date)
+            throw new ValidationException("The date of employment cannot be less than the date of birth");
+
+        if ((EmploymentDate - BirthDate).TotalDays / 365 < 18) 
+            throw new ValidationException($"Only adults can be hired (EmploymentDate - {EmploymentDate.ToShortDateString()}, BirthDate - {BirthDate.ToShortDateString()})");
+    }
+}

CandyHouseSolution/CandyHouseContracts/DataModels/PostDataModel.cs

@@ -0,0 +1,53 @@
+using CandyHouseContracts.Enums;
+using CandyHouseContracts.Exceptions;
+using CandyHouseContracts.Extensions;
+using CandyHouseContracts.Infrastructure;
+using CandyHouseContracts.Infrastructure.PostConfigurations;
+using Microsoft.Extensions.Configuration;
+using Newtonsoft.Json.Linq;
+using Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.DataModels;
+
+public class PostDataModel(string postId, string postName, PostType postType, PostConfiguration configuration) : IValidation
+{
+    public string Id { get; private set; } = postId;
+    public string PostName { get; private set; } = postName;
+    public PostType PostType { get; private set; } = postType;
+    public PostConfiguration ConfigurationModel { get; private set; } = configuration;
+
+    public PostDataModel(string postId, string postName, PostType postType, string configurationJson) : this(postId, postName, postType, (PostConfiguration)null)
+    {
+        var obj = JToken.Parse(configurationJson);
+        if (obj is not null)
+        {
+            ConfigurationModel = obj.Value<string>("Type") switch
+            {
+                nameof(ManagerPostConfiguration) => JsonConvert.DeserializeObject<ManagerPostConfiguration>(configurationJson)!,
+                nameof(BakerPostConfiguration) => JsonConvert.DeserializeObject<BakerPostConfiguration>(configurationJson)!,
+                _ => JsonConvert.DeserializeObject<PostConfiguration>(configurationJson)!,
+            };
+        }
+    }
+
+    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 (PostName.IsEmpty())
+            throw new ValidationException("Field PostName is empty");
+        if (PostType == PostType.None)
+            throw new ValidationException("Field PostType is empty");
+        if (ConfigurationModel is null)
+            throw new ValidationException("Field ConfigurationModel is not initialized");
+        if (ConfigurationModel!.Rate <= 0)
+            throw new ValidationException("Field Rate is less or equal zero");
+    }
+}

CandyHouseSolution/CandyHouseContracts/DataModels/ProductDataModel.cs

@@ -0,0 +1,38 @@
+using CandyHouseContracts.Enums;
+using CandyHouseContracts.Exceptions;
+using CandyHouseContracts.Extensions;
+using CandyHouseContracts.Infrastructure;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Xml.Linq;
+
+namespace CandyHouseContracts.DataModels;
+
+public class ProductDataModel(string id, string productName, string productDescription, double price, ProductType productType) : IValidation
+{
+    public string Id { get; private set; } = id;
+    public string ProductName { get; private set; } = productName;
+    public string ProductDescription { get; private set; } = productDescription;
+    public double Price { get; private set; } = price;
+    public ProductType ProductType { get; private set; } = productType;
+
+    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 (ProductName.IsEmpty())
+            throw new ValidationException("Field ProductName is empty");
+        if (ProductDescription.IsEmpty())
+            throw new ValidationException("Field ProductDescription is empty");
+        if (Price <= 0)
+            throw new ValidationException("Field Price is less than or equal to 0");
+        if (ProductType == ProductType.None)
+            throw new ValidationException("Field Type is empty");
+    }
+}

CandyHouseSolution/CandyHouseContracts/DataModels/ProductHistoryDataModel.cs

@@ -0,0 +1,41 @@
+using CandyHouseContracts.Exceptions;
+using CandyHouseContracts.Extensions;
+using CandyHouseContracts.Infrastructure;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.DataModels;
+
+public class ProductHistoryDataModel(string productId, double oldPrice) : IValidation
+{
+    private readonly ProductDataModel? _product;
+
+    public string ProductId { get; private set; } = productId;
+
+    public double OldPrice { get; private set; } = oldPrice;
+
+    public DateTime ChangeDate { get; private set; } = DateTime.UtcNow;
+
+    public string ProductName => _product?.ProductName ?? string.Empty;
+
+    public ProductHistoryDataModel(string productId, double oldPrice, DateTime changeDate, ProductDataModel product) : this(productId, oldPrice)
+    {
+        ChangeDate = changeDate;
+        _product = product;
+    }
+
+    public void Validate()
+    {
+        if (ProductId.IsEmpty())
+            throw new ValidationException("Field ProductId is empty");
+
+        if (!ProductId.IsGuid())
+            throw new ValidationException("The value in the field ProductId is not a unique identifier");
+
+        if (OldPrice <= 0)
+            throw new ValidationException("Field OldPrice is less than or equal to 0");
+    }
+}

CandyHouseSolution/CandyHouseContracts/DataModels/ProductHistoryPricesDataModel.cs

@@ -0,0 +1,8 @@
+namespace CandyHouseContracts.DataModels;
+
+public class ProductHistoryPricesDataModel
+{
+    public required string ProductName { get; set; }
+
+    public required List<string> Prices { get; set; }
+}

CandyHouseSolution/CandyHouseContracts/DataModels/SalaryDataModel.cs

@@ -0,0 +1,39 @@
+using CandyHouseContracts.Exceptions;
+using CandyHouseContracts.Extensions;
+using CandyHouseContracts.Infrastructure;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.DataModels;
+
+public class SalaryDataModel(string employeeId, DateTime salaryDate, double employeeSalary) : IValidation
+{
+    private readonly EmployeeDataModel? _employee;
+    public string EmployeeId { get; private set; } = employeeId;
+
+    public DateTime SalaryDate { get; private set; } = salaryDate;
+
+    public double Salary { get; private set; } = employeeSalary;
+
+    public string EmployeeFIO => _employee?.FIO ?? string.Empty;
+
+    public SalaryDataModel(string employeeId, DateTime salaryDate, double employeeSalary, EmployeeDataModel employee) : this(employeeId, salaryDate, employeeSalary)
+    {
+        _employee = employee;
+    }
+
+    public void Validate()
+    {
+        if (EmployeeId.IsEmpty())
+            throw new ValidationException("Field EmployeeId is empty");
+
+        if (!EmployeeId.IsGuid())
+            throw new ValidationException("The value in the field EmployeeId is not a unique identifier");
+
+        if (Salary <= 0)
+            throw new ValidationException("Field Salary is less than or equal to 0");
+    }
+}

CandyHouseSolution/CandyHouseContracts/DataModels/SaleDataModel.cs

@@ -0,0 +1,109 @@
+using CandyHouseContracts.Enums;
+using CandyHouseContracts.Exceptions;
+using CandyHouseContracts.Extensions;
+using CandyHouseContracts.Infrastructure;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.DataModels;
+
+public class SaleDataModel : IValidation
+{
+    private readonly ClientDataModel? _client;
+
+    private readonly EmployeeDataModel? _employee;
+
+    public string Id { get; private set; }
+
+    public string EmployeeId { get; private set; }
+
+    public string? ClientId { get; private set; }
+
+    public DateTime SaleDate { get; private set; } = DateTime.UtcNow;
+
+    public double Sum { get; private set; }
+
+    public DiscountType DiscountType { get; private set; }
+
+    public double Discount { get; private set; }
+
+    public bool IsCancel { get; private set; }
+
+    public List<SaleProductDataModel>? Products { get; private set; }
+
+    public string ClientFIO => _client?.FIO ?? string.Empty;
+
+    public string EmployeeFIO => _employee?.FIO ?? string.Empty;
+
+    public SaleDataModel(string id, string employeeId, string? clientId, DiscountType discountType, bool isCancel, List<SaleProductDataModel> saleProducts)
+    {
+        Id = id;
+        EmployeeId = employeeId;
+        ClientId = clientId;
+        DiscountType = discountType;
+        IsCancel = isCancel;
+        Products = saleProducts;
+        var percent = 0.0;
+        foreach (DiscountType elem in Enum.GetValues<DiscountType>())
+        {
+            if ((elem & discountType) != 0)
+            {
+                switch (elem)
+                {
+                    case DiscountType.None:
+                        break;
+                    case DiscountType.OnSale:
+                        percent += 0.1;
+                        break;
+                    case DiscountType.RegularCustomer:
+                        percent += 0.5;
+                        break;
+                    case DiscountType.Certificate:
+                        percent += 0.3;
+                        break;
+                }
+            }
+        }
+        Sum = Products?.Sum(x => x.Price * x.Count) ?? 0;
+        Discount = Sum * percent;
+    }
+
+    public SaleDataModel(string id, string employeeId, string? clientId, double sum, DiscountType discountType, double discount, bool isCancel,
+        List<SaleProductDataModel> saleProducts, EmployeeDataModel employee, ClientDataModel? client) : this(id, employeeId, clientId, discountType, isCancel, saleProducts)
+    {
+        Sum = sum;
+        Discount = discount;
+        _employee = employee;
+        _client = client;
+    }
+
+    public SaleDataModel(string id, string employeeId, string? clientId, int discountType, 
+        List<SaleProductDataModel> products) : this(id, employeeId, clientId, (DiscountType)discountType, false, products) { }
+
+    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 (EmployeeId.IsEmpty())
+            throw new ValidationException("Field EmployeeId is empty");
+
+        if (!EmployeeId.IsGuid())
+            throw new ValidationException("The value in the field EmployeeId is not a unique identifier");
+
+        if (!ClientId?.IsGuid() ?? !ClientId?.IsEmpty() ?? false)
+            throw new ValidationException("The value in the field EmploeerId is not a unique identifier");
+
+        if (Sum <= 0)
+            throw new ValidationException("Field Sum is less than or equal to 0");
+
+        if ((Products?.Count ?? 0) == 0)
+            throw new ValidationException("The sale must include products");
+    }
+}

CandyHouseSolution/CandyHouseContracts/DataModels/SaleProductDataModel.cs

@@ -0,0 +1,52 @@
+using CandyHouseContracts.Exceptions;
+using CandyHouseContracts.Extensions;
+using CandyHouseContracts.Infrastructure;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.DataModels;
+
+public class SaleProductDataModel(string saleId, string productId, int count, double price) : IValidation
+{
+    private readonly ProductDataModel? _product;
+
+    public string SaleId { get; private set; } = saleId;
+
+    public string ProductId { get; private set; } = productId;
+
+    public int Count { get; private set; } = count;
+
+    public double Price { get; private set; } = price;
+
+    public string ProductName => _product?.ProductName ?? string.Empty;
+
+    public SaleProductDataModel(string saleId, string productId, int count, double price, ProductDataModel product) : this(saleId, productId, count, price)
+    {
+        _product = product;
+    }
+
+    public void Validate()
+    {
+        if (SaleId.IsEmpty())
+            throw new ValidationException("Field SaleId is empty");
+
+        if (!SaleId.IsGuid())
+            throw new ValidationException("The value in the field SaleId is not a unique identifier");
+
+        if (ProductId.IsEmpty())
+            throw new ValidationException("Field ProductId is empty");
+
+        if (!ProductId.IsGuid())
+            throw new ValidationException("The value in the field ProductId 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");
+    }
+}

CandyHouseSolution/CandyHouseContracts/Enums/DiscountType.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.Enums;
+[Flags]
+public enum DiscountType
+{
+    None = 0,
+    OnSale = 1,
+    RegularCustomer = 2,
+    Certificate = 4
+}

CandyHouseSolution/CandyHouseContracts/Enums/PostType.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.Enums;
+
+public enum PostType
+{
+    None = 0,
+    Manager = 1,
+    SuperManager = 2,
+    Baker = 3,
+}

CandyHouseSolution/CandyHouseContracts/Enums/ProductType.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.Enums;
+
+public enum ProductType
+{
+    None = 0,
+    Candy = 1,
+    Cake = 2,
+    Chocolate = 3,
+}

CandyHouseSolution/CandyHouseContracts/Exceptions/ElementDeletedException.cs

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

CandyHouseSolution/CandyHouseContracts/Exceptions/ElementExistsException.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.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;
+    }
+}

CandyHouseSolution/CandyHouseContracts/Exceptions/ElementNotFoundException .cs

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

CandyHouseSolution/CandyHouseContracts/Exceptions/IncorrectDatesException .cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.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}") { }
+}

CandyHouseSolution/CandyHouseContracts/Exceptions/NullListException.cs

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

CandyHouseSolution/CandyHouseContracts/Exceptions/StorageException .cs

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

CandyHouseSolution/CandyHouseContracts/Exceptions/ValidationException.cs

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

CandyHouseSolution/CandyHouseContracts/Extensions/DateTimeExtensions.cs

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

CandyHouseSolution/CandyHouseContracts/Extensions/StringExtensions.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.Extensions;
+
+public static class StringExtensions
+{
+    public static bool IsEmpty(this string str) => string.IsNullOrWhiteSpace(str);
+    public static bool IsGuid(this string str) => Guid.TryParse(str, out _);
+}

CandyHouseSolution/CandyHouseContracts/Infrastructure/IConfigurationDatabase.cs

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

CandyHouseSolution/CandyHouseContracts/Infrastructure/IConfigurationSalary.cs

@@ -0,0 +1,8 @@
+namespace CandyHouseContracts.Infrastructure;
+
+public interface IConfigurationSalary
+{
+    double ExtraSaleSum { get; }
+
+    int MaxConcurrentThreads { get; }
+}

CandyHouseSolution/CandyHouseContracts/Infrastructure/IValidation.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.Infrastructure;
+
+public interface IValidation
+{
+    void Validate();
+}
+

CandyHouseSolution/CandyHouseContracts/Infrastructure/OperationResponse.cs

@@ -0,0 +1,59 @@
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.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/octet-stream")
+            {
+                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 };
+}

CandyHouseSolution/CandyHouseContracts/Infrastructure/PostConfigurations/BakerPostConfiguration.cs

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

CandyHouseSolution/CandyHouseContracts/Infrastructure/PostConfigurations/ManagerPostConfiguration.cs

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

CandyHouseSolution/CandyHouseContracts/Infrastructure/PostConfigurations/PostConfiguration.cs

@@ -0,0 +1,7 @@
+namespace CandyHouseContracts.Infrastructure.PostConfigurations;
+
+public class PostConfiguration
+{
+    public virtual string Type => nameof(PostConfiguration);
+    public double Rate { get; set; }
+}

CandyHouseSolution/CandyHouseContracts/StoragesContracts/IClientDiscountStorageContract.cs

@@ -0,0 +1,12 @@
+using CandyHouseContracts.DataModels;
+
+namespace CandyHouseContracts.StoragesContracts;
+
+public interface IClientDiscountStorageContract
+{
+    List<ClientDiscountDataModel> GetList(DateTime startDate, DateTime endDate, string? clientId = null);
+
+    Task<List<ClientDiscountDataModel>> GetListAsync(DateTime startDate, DateTime endDate, CancellationToken ct);
+
+    void AddElement(ClientDiscountDataModel clientDiscountDataModel);
+}

CandyHouseSolution/CandyHouseContracts/StoragesContracts/IClientStorageContract.cs

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

CandyHouseSolution/CandyHouseContracts/StoragesContracts/IEmployeeStorageContract.cs

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

CandyHouseSolution/CandyHouseContracts/StoragesContracts/IPostStorageContract.cs

@@ -0,0 +1,20 @@
+using CandyHouseContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.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);
+}

CandyHouseSolution/CandyHouseContracts/StoragesContracts/IProductStorageContract.cs

@@ -0,0 +1,20 @@
+using CandyHouseContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.StoragesContracts;
+
+public interface IProductStorageContract
+{
+    List<ProductDataModel> GetList();
+    List<ProductHistoryDataModel> GetHistoryByProductId(string productId);
+    ProductDataModel? GetElementById(string id);
+    ProductDataModel? GetElementByName(string name);
+    void AddElement(ProductDataModel productDataModel);
+    void UpdElement(ProductDataModel productDataModel);
+    void DelElement(string id);
+    Task<List<ProductDataModel>> GetListAsync(CancellationToken ct);
+}

CandyHouseSolution/CandyHouseContracts/StoragesContracts/ISalaryStorageContract.cs

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

CandyHouseSolution/CandyHouseContracts/StoragesContracts/ISaleStorageContract.cs

@@ -0,0 +1,22 @@
+using CandyHouseContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.StoragesContracts;
+
+public interface ISaleStorageContract
+{
+    List<SaleDataModel> GetList(DateTime? startDate = null, DateTime? endDate = null, string? employeeId = null, 
+        string? clientId = null, string? productId = null);
+
+    SaleDataModel? GetElementById(string id);
+
+    void AddElement(SaleDataModel saleDataModel);
+
+    void DelElement(string id);
+    
+    Task<List<SaleDataModel>> GetListAsync(DateTime startDate, DateTime endDate, CancellationToken ct);
+}

CandyHouseSolution/CandyHouseContracts/ViewModels/ClientDiscountByPeriodViewModel.cs

@@ -0,0 +1,12 @@
+namespace CandyHouseContracts.ViewModels;
+
+public class ClientDiscountByPeriodViewModel
+{
+    public required string ClientFIO { get; set; }
+
+    public double TotalDiscount { get; set; }
+
+    public DateTime FromPeriod { get; set; }
+
+    public DateTime ToPeriod { get; set; }
+}

CandyHouseSolution/CandyHouseContracts/ViewModels/ClientViewModel.cs

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

CandyHouseSolution/CandyHouseContracts/ViewModels/EmployeeViewModel.cs

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

CandyHouseSolution/CandyHouseContracts/ViewModels/PostViewModel.cs

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

CandyHouseSolution/CandyHouseContracts/ViewModels/ProductHistoryPricesViewModel.cs

@@ -0,0 +1,8 @@
+namespace CandyHouseContracts.ViewModels;
+
+public class ProductHistoryPricesViewModel
+{
+    public required string ProductName { get; set; }
+
+    public required List<string> Prices { get; set; }
+}