fix

ready
Merge remote-tracking branch 'origin/lab-4' into lab-4
2025-04-15 00:47:03 +04:00 · 2025-04-14 22:46:08 +04:00 · 2025-04-14 22:17:32 +04:00 · 2025-04-14 22:17:22 +04:00 · 2025-04-14 22:15:04 +04:00 · 2025-04-14 22:07:51 +04:00
198 changed files with 12375 additions and 5494 deletions
--- a/.gitignore
+++ b/.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/
--- a/CandyHouseSolution/CandyHouseBase/App.config
+++ b/CandyHouseSolution/CandyHouseBase/App.config
@@ -1,10 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?><configuration>
-  <runtime>
-    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
-      <dependentAssembly>
-        <assemblyIdentity name="System.Threading.Tasks.Extensions" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-4.2.1.0" newVersion="4.2.1.0" />
-      </dependentAssembly>
-    </assemblyBinding>
-  </runtime>
-</configuration>
--- a/CandyHouseSolution/CandyHouseBase/AssemblyInfo.cs
+++ b/CandyHouseSolution/CandyHouseBase/AssemblyInfo.cs
@@ -1,3 +0,0 @@
-using System.Runtime.CompilerServices;
-
-[assembly: InternalsVisibleTo("CandyHouseTests")]
--- a/CandyHouseSolution/CandyHouseBase/CandyHouseBase.csproj
+++ b/CandyHouseSolution/CandyHouseBase/CandyHouseBase.csproj
@@ -1,172 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="8.0" 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>
-        <LangVersion>12</LangVersion>
-    </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="Castle.Core, Version=5.0.0.0, Culture=neutral, PublicKeyToken=407dd0808d44fbdc, processorArchitecture=MSIL">
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-        <Reference Include="System.Xml"/>
-    </ItemGroup>
-    <ItemGroup>
-        <Compile Include="AssemblyInfo.cs" />
-        <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\DateTimeExtensions.cs" />
-        <Compile Include="Exceptions\ElementExistsException.cs" />
-        <Compile Include="Exceptions\ElementNotFoundException.cs" />
-        <Compile Include="Exceptions\IncorrectDatesException.cs" />
-        <Compile Include="Exceptions\NullListException.cs" />
-        <Compile Include="Exceptions\StorageException.cs" />
-        <Compile Include="Exceptions\ValidationException.cs" />
-        <Compile Include="Extensions\StringExtensions.cs" />
-        <Compile Include="Implementations\IngredientBusinessLogicContract.cs" />
-        <Compile Include="Implementations\OrderBusinessLogicContract.cs" />
-        <Compile Include="Implementations\PekarBusinessLogicContract.cs" />
-        <Compile Include="Implementations\PositionBusinessLogicContract.cs" />
-        <Compile Include="Implementations\ProductBusinessLogicContract.cs" />
-        <Compile Include="Implementations\SalaryBusinessLogicContract.cs" />
-        <Compile Include="Infrastructure\IValidation.cs" />
-        <Compile Include="Interfaces\BusinessLogicsContracts\IIngredientBusinessLogicContact.cs" />
-        <Compile Include="Interfaces\BusinessLogicsContracts\IOrderBusinessLogicContact.cs" />
-        <Compile Include="Interfaces\BusinessLogicsContracts\IPekarBusinessLogicContact.cs" />
-        <Compile Include="Interfaces\BusinessLogicsContracts\IPositionBusinessLogicContact.cs" />
-        <Compile Include="Interfaces\BusinessLogicsContracts\IProductBusinessLogicContact.cs" />
-        <Compile Include="Interfaces\BusinessLogicsContracts\ISalaryBusinessLogicContact.cs" />
-        <Compile Include="Interfaces\StoragesContracts\IIngredientStorageContact.cs" />
-        <Compile Include="Interfaces\StoragesContracts\IOrderStorageContact.cs" />
-        <Compile Include="Interfaces\StoragesContracts\IPekarStorageContact.cs" />
-        <Compile Include="Interfaces\StoragesContracts\IPositionStorageContact.cs" />
-        <Compile Include="Interfaces\StoragesContracts\IProductStorageContact.cs" />
-        <Compile Include="Interfaces\StoragesContracts\ISalaryStorageContact.cs" />
-        <Compile Include="Program.cs" />
-    </ItemGroup>
-	<ItemGroup>
-        <InternalsVisibleTo Include="CatHasPawsTests" />
-        <InternalsVisibleTo Include="DynamicProxyGenAssembly2" />
-    </ItemGroup>
-    <ItemGroup>
-      <None Include="App.config" />
-      <None Include="packages.config" />
-    </ItemGroup>
-    <ItemGroup>
-      <Content Include="ILLink\ILLink.Descriptors.LibraryBuild.xml" />
-    </ItemGroup>
-    <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets"/>
-    <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
-         Other similar extension points exist, see Microsoft.Common.targets.
-    <Target Name="BeforeBuild">
-    </Target>
-    <Target Name="AfterBuild">
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-    -->
-    <ItemGroup>
-        <AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleTo">
-            <_Parameter1>$(AssemblyName).Test.dll</_Parameter1>
-        </AssemblyAttribute>
-    </ItemGroup>
-</Project>
--- a/CandyHouseSolution/CandyHouseBase/DataModels/IngredientDataModel.cs
+++ b/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");
-        }
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/DataModels/OrderDataModel.cs
+++ b/CandyHouseSolution/CandyHouseBase/DataModels/OrderDataModel.cs
@@ -1,45 +0,0 @@
-using System;
-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 ProductId { 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 productId, string pekarId, StatusType statusType)
-        {
-            Id = id;
-            CustomerName = customerName;
-            OrderDate = orderDate;
-            TotalAmount = totalAmount;
-            DiscountAmount = discountAmount;
-            ProductId = productId;
-            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 (ProductId.IsEmpty()) throw new ValidationException("Field productId is empty");
-            if (!ProductId.IsGuid()) throw new ValidationException("productId must be a GUID");
-        }
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/DataModels/PekarDataModel.cs
+++ b/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");
-        }
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/DataModels/PekarHistoryDataModel.cs
+++ b/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");
-        }
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/DataModels/PositionDataModel.cs
+++ b/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");
-        }
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/DataModels/ProductDataModel.cs
+++ b/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;
-            set
-            {
-                if (!name.IsEmpty()) OldName = name;
-                name = value.Trim();
-            }
-        }
-
-        public string Description
-        {
-            get => description;
-            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");
-        }
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/DataModels/RecipeDataModel.cs
+++ b/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");
-        }
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/DataModels/SalaryDataModel.cs
+++ b/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");
-        }
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/Enums/PositionType.cs
+++ b/CandyHouseSolution/CandyHouseBase/Enums/PositionType.cs
@@ -1,10 +0,0 @@
-namespace CandyHouseBase.Enums
-{
-    public enum PositionType
-    {
-        None = 1,
-        Small = 2,
-        Medium = 3,
-        Cool = 4,
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/Enums/StatusType.cs
+++ b/CandyHouseSolution/CandyHouseBase/Enums/StatusType.cs
@@ -1,10 +0,0 @@
-namespace CandyHouseBase.Enums
-{
-    public enum StatusType
-    {
-        Pending,
-        Completed,
-        Cancelled,
-        InProgress
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/Exceptions/IncorrectDatesException.cs
+++ b/CandyHouseSolution/CandyHouseBase/Exceptions/IncorrectDatesException.cs
@@ -1,11 +0,0 @@
-using System;
-
-namespace CandyHouseBase.Exceptions;
-
-public class IncorrectDatesException : Exception
-{
-    public IncorrectDatesException(DateTime start, DateTime end) : base(
-        $"The end date must be later than the start date.. StartDate: {start:dd.MM.YYYY}. EndDate: {end:dd.MM.YYYY}")
-    {
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/Exceptions/NullListException.cs
+++ b/CandyHouseSolution/CandyHouseBase/Exceptions/NullListException.cs
@@ -1,10 +0,0 @@
-using System;
-
-namespace CandyHouseBase.Exceptions;
-
-public class NullListException : Exception
-{
-    public NullListException() : base("The returned list is null")
-    {
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/Exceptions/StorageException.cs
+++ b/CandyHouseSolution/CandyHouseBase/Exceptions/StorageException.cs
@@ -1,11 +0,0 @@
-using System;
-
-namespace CandyHouseBase.Exceptions;
-
-public class StorageException : Exception
-
-{
-    public StorageException(Exception ex) : base($"Error while working in storage: {ex.Message}", ex)
-    {
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/Exceptions/ValidationException.cs
+++ b/CandyHouseSolution/CandyHouseBase/Exceptions/ValidationException.cs
@@ -1,9 +0,0 @@
-using System;
-
-namespace CandyHouseBase.Exceptions
-{
-    public class ValidationException : Exception
-    {
-        public ValidationException(string message) : base(message) { }
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/Extensions/StringExtensions.cs
+++ b/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 _);
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/Implementations/IngredientBusinessLogicContract.cs
+++ b/CandyHouseSolution/CandyHouseBase/Implementations/IngredientBusinessLogicContract.cs
@@ -1,86 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Text.Json;
-using CandyHouseBase.DataModels;
-using CandyHouseBase.Exceptions;
-using CandyHouseBase.Extensions;
-using CandyHouseBase.Interfaces.BusinessLogicsContracts;
-using CandyHouseBase.Interfaces.StoragesContracts;
-using Microsoft.Extensions.Logging;
-
-namespace CandyHouseBase.Implementations
-{
-    internal class IngredientBusinessLogicContract(
-        IIngredientStorageContact ingredientStorageContact,
-        ILogger logger)
-        : IIngredientBusinessLogicContact
-    {
-        private readonly IIngredientStorageContact _ingredientStorageContact = ingredientStorageContact;
-        private readonly ILogger _logger = logger;
-
-        public List<IngredientDataModel> GetAllIngredients()
-        {
-            _logger.LogInformation("GetAllIngredients");
-            var ingredients = _ingredientStorageContact.GetList() ?? throw new NullListException();
-            return ingredients;
-        }
-
-        public IngredientDataModel GetIngredientByData(string data)
-        {
-            _logger.LogInformation("GetIngredientByData for data: {data}", data);
-            if (data == null)
-                throw new ArgumentNullException(nameof(data));
-            if (string.IsNullOrEmpty(data))
-                throw new ArgumentNullException(nameof(data));
-            if (data.IsGuid())
-            {
-                var ingredient = _ingredientStorageContact.GetElementById(data);
-                if (ingredient == null)
-                    throw new ElementNotFoundException(data);
-                return ingredient;
-            }
-            else
-            {
-                var ingredient = _ingredientStorageContact.GetElementByName(data);
-                if (ingredient == null)
-                    throw new ElementNotFoundException(data);
-                return ingredient;
-            }
-        }
-
-        public void InsertIngredient(IngredientDataModel ingredient)
-        {
-            _logger.LogInformation("InsertIngredient: {json}", JsonSerializer.Serialize(ingredient));
-            if (ingredient == null)
-                throw new ArgumentNullException(nameof(ingredient));
-            ingredient.Validate();
-            _ingredientStorageContact.AddElement(ingredient);
-        }
-
-        public void UpdateIngredient(IngredientDataModel ingredient)
-        {
-            _logger.LogInformation("UpdateIngredient: {json}", JsonSerializer.Serialize(ingredient));
-            if (ingredient == null)
-                throw new ArgumentNullException(nameof(ingredient));
-            ingredient.Validate();
-            _ingredientStorageContact.UpdateElement(ingredient);
-        }
-
-        public void DeleteIngredient(string id)
-        {
-            _logger.LogInformation("DeleteIngredient for id: {id}", id);
-            if (id == null)
-                throw new ArgumentNullException(nameof(id));
-            if (string.IsNullOrEmpty(id))
-                throw new ArgumentNullException(nameof(id));
-            if (!id.IsGuid())
-                throw new ValidationException("id must be a GUID");
-
-            var ingredient = _ingredientStorageContact.GetElementById(id);
-            if (ingredient == null)
-                throw new ElementNotFoundException(id);
-
-            _ingredientStorageContact.DeleteElement(id);
-        }
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/Implementations/OrderBusinessLogicContract.cs
+++ b/CandyHouseSolution/CandyHouseBase/Implementations/OrderBusinessLogicContract.cs
@@ -1,126 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Text.Json;
-using CandyHouseBase.DataModels;
-using CandyHouseBase.Enums;
-using CandyHouseBase.Exceptions;
-using CandyHouseBase.Extensions;
-using CandyHouseBase.Interfaces.BusinessLogicsContracts;
-using CandyHouseBase.Interfaces.StoragesContracts;
-using Microsoft.Extensions.Logging;
-
-namespace CandyHouseBase.Implementations
-{
-    internal class OrderBusinessLogicContract(
-        IOrderStorageContact orderStorageContact,
-        IPekarStorageContact pekarStorageContact,
-        IProductStorageContact productStorageContact,
-        ILogger logger)
-        : IOrderBusinessLogicContact
-    {
-        private readonly IOrderStorageContact _orderStorageContact = orderStorageContact;
-        private readonly IPekarStorageContact _pekarStorageContact = pekarStorageContact;
-        private readonly IProductStorageContact _productStorageContact = productStorageContact;
-        private readonly ILogger _logger = logger;
-
-        public List<OrderDataModel> GetAllOrders()
-        {
-            _logger.LogInformation("GetAllOrders");
-            var orders = _orderStorageContact.GetOrders() ?? throw new NullListException();
-            return orders;
-        }
-
-        public OrderDataModel GetOrderByData(string data)
-        {
-            _logger.LogInformation("GetOrderByData for data: {data}", data);
-            if (data == null)
-                throw new ArgumentNullException(nameof(data));
-            if (string.IsNullOrEmpty(data))
-                throw new ArgumentNullException(nameof(data));
-            if (!data.IsGuid())
-                throw new ValidationException("data must be a GUID");
-
-            var order = _orderStorageContact.GetElementById(data) ?? throw new ElementNotFoundException(data);
-            return order;
-        }
-
-        public void InsertOrder(OrderDataModel order)
-        {
-            _logger.LogInformation("InsertOrder: {json}", JsonSerializer.Serialize(order));
-            if (order == null)
-                throw new ArgumentNullException(nameof(order));
-            order.Validate();
-
-            // Check if Pekar exists
-            if (_pekarStorageContact.GetElementById(order.PekarId) == null)
-                throw new ElementNotFoundException(order.PekarId);
-
-            // Check if Product exists
-            if (_productStorageContact.GetElementById(order.ProductId) == null)
-                throw new ElementNotFoundException(order.ProductId);
-
-            // Check if order with this ID already exists
-            var existingOrder = _orderStorageContact.GetElementById(order.Id);
-            if (existingOrder != null)
-                throw new ElementExistsException("ID", order.Id);
-
-            try
-            {
-                _orderStorageContact.AddElement(order);
-            }
-            catch (Exception ex)
-            {
-                throw new StorageException(ex);
-            }
-        }
-
-        public void UpdateOrder(OrderDataModel order)
-        {
-            _logger.LogInformation("UpdateOrder: {json}", JsonSerializer.Serialize(order));
-            if (order == null)
-                throw new ArgumentNullException(nameof(order));
-            order.Validate();
-
-            // Check if Pekar exists
-            if (_pekarStorageContact.GetElementById(order.PekarId) == null)
-                throw new ElementNotFoundException(order.PekarId);
-
-            // Check if Product exists
-            if (_productStorageContact.GetElementById(order.ProductId) == null)
-                throw new ElementNotFoundException(order.ProductId);
-
-            try
-            {
-                _orderStorageContact.UpdateElement(order);
-            }
-            catch (Exception ex)
-            {
-                throw new StorageException(ex);
-            }
-        }
-
-        public void DeleteOrder(string id)
-        {
-            _logger.LogInformation("DeleteOrder for id: {id}", id);
-            if (id == null)
-                throw new ArgumentNullException(nameof(id));
-            if (string.IsNullOrEmpty(id))
-                throw new ArgumentNullException(nameof(id));
-            if (!id.IsGuid())
-                throw new ValidationException("id must be a GUID");
-
-            var order = _orderStorageContact.GetElementById(id);
-            if (order == null)
-                throw new ElementNotFoundException(id);
-
-            try
-            {
-                _orderStorageContact.DeleteElement(order);
-            }
-            catch (Exception ex)
-            {
-                throw new StorageException(ex);
-            }
-        }
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/Implementations/PekarBusinessLogicContract.cs
+++ b/CandyHouseSolution/CandyHouseBase/Implementations/PekarBusinessLogicContract.cs
@@ -1,174 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text.Json;
-using System.Text.RegularExpressions;
-using CandyHouseBase.DataModels;
-using CandyHouseBase.Enums;
-using CandyHouseBase.Exceptions;
-using CandyHouseBase.Extensions;
-using CandyHouseBase.Interfaces.BusinessLogicsContracts;
-using CandyHouseBase.Interfaces.StoragesContracts;
-using Microsoft.Extensions.Logging;
-
-namespace CandyHouseBase.Implementations
-{
-    internal class PekarBusinessLogicContract(
-        IPekarStorageContact pekarStorageContact,
-        IProductStorageContact productStorageContact,
-        IPositionStorageContact positionStorageContact,
-        ILogger logger)
-        : IPekarBusinessLogicContact
-    {
-        private readonly IPekarStorageContact _pekarStorageContact = pekarStorageContact;
-        private readonly IProductStorageContact _productStorageContact = productStorageContact;
-        private readonly IPositionStorageContact _positionStorageContact = positionStorageContact;
-        private readonly ILogger _logger = logger;
-
-        public List<PekarDataModel> GetAllPekars()
-        {
-            _logger.LogInformation("GetAllPekars");
-            var pekars = _pekarStorageContact.GetList() ?? throw new NullListException();
-            return pekars;
-        }
-
-        public List<PekarDataModel> GetAllDataOfPekar(string pekarId)
-        {
-            _logger.LogInformation("GetAllDataOfPekar for pekarId: {pekarId}", pekarId);
-            if (pekarId.IsEmpty())
-                throw new ArgumentNullException(nameof(pekarId));
-            if (!pekarId.IsGuid())
-                throw new ValidationException("pekarId must be a GUID");
-
-            var pekarsWithHistory = _pekarStorageContact.GetPekarWithHistory(pekarId);
-            if (pekarsWithHistory == null || !pekarsWithHistory.Any())
-                throw new ElementNotFoundException(pekarId);
-
-            var historyRecords = new List<PekarDataModel>();
-            foreach (var pekar in pekarsWithHistory)
-            {
-                Guid positionGuid;
-                if (!Guid.TryParse(pekar.Position, out positionGuid))
-                {
-                    _logger.LogWarning("Invalid Position GUID: {Position}", pekar.Position);
-                    continue;
-                }
-
-                var position = _positionStorageContact.GetElementById(positionGuid.ToString());
-                if (position == null)
-                    throw new ElementNotFoundException(pekar.Position);
-                historyRecords.Add(new PekarDataModel(pekar.Id, pekar.FIO, position.Id, pekar.BonusCoefficient,
-                    new List<ProductDataModel>()));
-            }
-
-            if (!historyRecords.Any())
-            {
-                var firstPekar = pekarsWithHistory.First();
-                Guid positionGuid;
-                if (Guid.TryParse(firstPekar.Position, out positionGuid))
-                {
-                    var position = _positionStorageContact.GetElementById(positionGuid.ToString());
-                    if (position != null)
-                        historyRecords.Add(new PekarDataModel(firstPekar.Id, firstPekar.FIO, position.Id,
-                            firstPekar.BonusCoefficient,
-                            new List<ProductDataModel>()));
-                }
-            }
-
-            return historyRecords;
-        }
-
-        public PekarDataModel GetPekarByData(string data)
-        {
-            _logger.LogInformation("GetPekarByData for data: {data}", data);
-            if (data.IsEmpty())
-                throw new ArgumentNullException(nameof(data));
-            if (!data.IsGuid() && !Regex.IsMatch(data, @"^[A-Za-zА-Яа-яЁё\s\-]+$"))
-                throw new ValidationException("data must be a GUID or FIO");
-
-            var pekar = _pekarStorageContact.GetElementById(data) ?? _pekarStorageContact.GetElementByFio(data) ??
-                throw new ElementNotFoundException(data);
-            return pekar;
-        }
-
-        public void InsertPekar(PekarDataModel pekar)
-        {
-            _logger.LogInformation("InsertPekar: {json}", JsonSerializer.Serialize(pekar));
-            if (pekar == null)
-                throw new ArgumentNullException(nameof(pekar));
-
-            pekar.Validate();
-
-            var existingPekar = _pekarStorageContact.GetElementById(pekar.Id);
-            if (existingPekar != null)
-            {
-                var history = new PekarHistoryDataModel(
-                    existingPekar.Id,
-                    existingPekar.FIO,
-                    existingPekar.Position,
-                    existingPekar.BonusCoefficient,
-                    DateTime.Now
-                );
-            }
-
-            foreach (var product in pekar.ProductsItems)
-            {
-                if (_productStorageContact.GetElementById(product.Id) == null)
-                    throw new ElementNotFoundException(product.Id);
-            }
-
-            _pekarStorageContact.AddElement(pekar);
-        }
-
-        public void UpdatePekar(PekarDataModel pekar)
-        {
-            _logger.LogInformation("UpdatePekar: {json}", JsonSerializer.Serialize(pekar));
-            if (pekar == null)
-                throw new ArgumentNullException(nameof(pekar));
-
-            pekar.Validate();
-
-            foreach (var product in pekar.ProductsItems)
-            {
-                if (_productStorageContact.GetElementById(product.Id) == null)
-                    throw new ElementNotFoundException(product.Id);
-            }
-
-            _pekarStorageContact.UpdateElement(pekar);
-        }
-
-        public void DeletePekar(string id)
-        {
-            _logger.LogInformation("DeletePekar for id: {id}", id);
-            if (id == null)
-                throw new ArgumentNullException(nameof(id));
-            if (string.IsNullOrEmpty(id))
-                throw new ArgumentNullException(nameof(id));
-            if (!id.IsGuid())
-                throw new ValidationException("id must be a GUID");
-
-            var pekar = _pekarStorageContact.GetElementById(id);
-            if (pekar == null)
-                throw new ElementNotFoundException(id);
-
-            _pekarStorageContact.DeleteElement(id);
-        }
-
-        public void RestorePekar(string id)
-        {
-            _logger.LogInformation("RestorePekar for id: {id}", id);
-            if (id == null)
-                throw new ArgumentNullException(nameof(id));
-            if (string.IsNullOrEmpty(id))
-                throw new ArgumentNullException(nameof(id));
-            if (!id.IsGuid())
-                throw new ValidationException("id must be a GUID");
-
-            var pekar = _pekarStorageContact.GetElementById(id);
-            if (pekar == null)
-                throw new ElementNotFoundException(id);
-
-            _pekarStorageContact.RestoreElement(id);
-        }
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/Implementations/PositionBusinessLogicContract.cs
+++ b/CandyHouseSolution/CandyHouseBase/Implementations/PositionBusinessLogicContract.cs
@@ -1,87 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Text.Json;
-using CandyHouseBase.DataModels;
-using CandyHouseBase.Enums;
-using CandyHouseBase.Exceptions;
-using CandyHouseBase.Extensions;
-using CandyHouseBase.Interfaces.BusinessLogicsContracts;
-using CandyHouseBase.Interfaces.StoragesContracts;
-using Microsoft.Extensions.Logging;
-
-namespace CandyHouseBase.Implementations
-{
-    internal class PositionBusinessLogicContract(
-        IPositionStorageContact positionStorageContact,
-        ILogger logger)
-        : IPositionBusinessLogicContact
-    {
-        private readonly IPositionStorageContact _positionStorageContact = positionStorageContact;
-        private readonly ILogger _logger = logger;
-
-        public List<PositionDataModel> GetAllPositions()
-        {
-            _logger.LogInformation("GetAllPositions");
-            var positions = _positionStorageContact.GetList() ?? throw new NullListException();
-            return positions;
-        }
-
-        public PositionDataModel GetPositionByData(string data)
-        {
-            _logger.LogInformation("GetPositionByData for data: {data}", data);
-            if (data.IsEmpty())
-                throw new ArgumentNullException(nameof(data));
-
-            var position = _positionStorageContact.GetElementById(data);
-            if (position == null)
-                throw new ElementNotFoundException(data);
-            if (!data.IsGuid())
-                throw new ValidationException("data must be a GUID");
-
-            return position;
-        }
-
-        public void InsertPosition(PositionDataModel position)
-        {
-            _logger.LogInformation("InsertPosition: {json}", JsonSerializer.Serialize(position));
-            if (position == null)
-                throw new ArgumentNullException(nameof(position));
-
-            position.Validate();
-            _positionStorageContact.AddElement(position);
-        }
-
-        public void UpdatePosition(PositionDataModel position)
-        {
-            _logger.LogInformation("UpdatePosition: {json}", JsonSerializer.Serialize(position));
-            if (position == null)
-                throw new ArgumentNullException(nameof(position));
-
-            position.Validate();
-            _positionStorageContact.UpdateElement(position);
-        }
-
-        public void DeletePosition(string id)
-        {
-            _logger.LogInformation("DeletePosition for id: {id}", id);
-            if (id.IsEmpty())
-                throw new ArgumentNullException(nameof(id));
-            if (!id.IsGuid())
-                throw new ValidationException("id must be a GUID");
-            
-            var position = _positionStorageContact.GetElementById(id);
-            if (position == null)
-                throw new ElementNotFoundException(id);
-
-
-            try
-            {
-                _positionStorageContact.DeleteElement(id);
-            }
-            catch (Exception ex)
-            {
-                throw new StorageException(ex);
-            }
-        }
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/Implementations/ProductBusinessLogicContract.cs
+++ b/CandyHouseSolution/CandyHouseBase/Implementations/ProductBusinessLogicContract.cs
@@ -1,114 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text.Json;
-using CandyHouseBase.DataModels;
-using CandyHouseBase.Exceptions;
-using CandyHouseBase.Extensions;
-using CandyHouseBase.Interfaces.BusinessLogicsContracts;
-using CandyHouseBase.Interfaces.StoragesContracts;
-using Microsoft.Extensions.Logging;
-
-namespace CandyHouseBase.Implementations
-{
-    internal class ProductBusinessLogicContract(
-        IProductStorageContact productStorageContact,
-        IIngredientStorageContact ingredientStorageContact,
-        ILogger logger)
-        : IProductBusinessLogicContact
-    {
-        private readonly IProductStorageContact _productStorageContact = productStorageContact;
-        private readonly IIngredientStorageContact _ingredientStorageContact = ingredientStorageContact;
-        private readonly ILogger _logger = logger;
-
-        public List<ProductDataModel> GetAllProducts()
-        {
-            _logger.LogInformation("GetAllProducts");
-            var products = _productStorageContact.GetList() ?? throw new NullListException();
-            return products;
-        }
-
-        public ProductDataModel GetProductByData(string data)
-        {
-            _logger.LogInformation("GetProductByData for data: {data}", data);
-            if (data == null)
-                throw new ArgumentNullException(nameof(data));
-            if (string.IsNullOrEmpty(data))
-                throw new ArgumentNullException(nameof(data));
-
-            if (data.IsGuid())
-            {
-                var product = _productStorageContact.GetElementById(data);
-                if (product == null)
-                    throw new ElementNotFoundException(data);
-                if (!data.IsGuid()) // Validate after existence check (redundant but kept for consistency)
-                    throw new ValidationException("data must be a GUID");
-                return product;
-            }
-            else
-            {
-                var products = _productStorageContact.GetList();
-                var productByName = products.FirstOrDefault(p => p.Name == data || (p.OldName != null && p.OldName == data));
-                if (productByName == null)
-                    throw new ElementNotFoundException(data);
-                return productByName;
-            }
-        }
-
-        public void InsertProduct(ProductDataModel product)
-        {
-            _logger.LogInformation("InsertProduct: {json}", JsonSerializer.Serialize(product));
-            if (product == null)
-                throw new ArgumentNullException(nameof(product));
-            product.Validate();
-
-            foreach (var ingredient in product.IngredientsItems)
-            {
-                if (_ingredientStorageContact.GetElementById(ingredient.Id) == null)
-                    throw new ElementNotFoundException(ingredient.Id);
-            }
-
-            _productStorageContact.AddElement(product);
-        }
-
-        public void UpdateProduct(ProductDataModel product)
-        {
-            _logger.LogInformation("UpdateProduct: {json}", JsonSerializer.Serialize(product));
-            if (product == null)
-                throw new ArgumentNullException(nameof(product));
-            product.Validate();
-
-            foreach (var ingredient in product.IngredientsItems)
-            {
-                if (_ingredientStorageContact.GetElementById(ingredient.Id) == null)
-                    throw new ElementNotFoundException(ingredient.Id);
-            }
-
-            _productStorageContact.UpdateElement(product);
-        }
-
-        public void DeleteProduct(string id)
-        {
-            _logger.LogInformation("DeleteProduct for id: {id}", id);
-            if (id == null)
-                throw new ArgumentNullException(nameof(id));
-            if (string.IsNullOrEmpty(id))
-                throw new ArgumentNullException(nameof(id));
-            if (!id.IsGuid())
-                throw new ValidationException("id must be a GUID");
-
-            var product = _productStorageContact.GetElementById(id);
-            if (product == null)
-                throw new ElementNotFoundException(id);
-
-            try
-            {
-                _productStorageContact.DeleteElement(id);
-            }
-            catch (Exception ex)
-            {
-                throw new StorageException(ex);
-            }
-        }
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/Implementations/SalaryBusinessLogicContract.cs
+++ b/CandyHouseSolution/CandyHouseBase/Implementations/SalaryBusinessLogicContract.cs
@@ -1,85 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Text.Json;
-using CandyHouseBase.DataModels;
-using CandyHouseBase.Exceptions;
-using CandyHouseBase.Extensions;
-using CandyHouseBase.Interfaces.BusinessLogicsContracts;
-using CandyHouseBase.Interfaces.StoragesContracts;
-using Microsoft.Extensions.Logging;
-
-namespace CandyHouseBase.Implementations
-{
-    internal class SalaryBusinessLogicContract(
-        ISalaryStorageContact salaryStorageContact,
-        IPekarStorageContact pekarStorageContact,
-        ILogger logger)
-        : ISalaryBusinessLogicContact
-    {
-        private readonly ISalaryStorageContact _salaryStorageContact = salaryStorageContact;
-        private readonly IPekarStorageContact _pekarStorageContact = pekarStorageContact;
-        private readonly ILogger _logger = logger;
-
-        public List<SalaryDataModel> GetAllSalaries()
-        {
-            _logger.LogInformation("GetAllSalaries");
-            var salaries = _salaryStorageContact.GetList() ?? throw new NullListException();
-            return salaries;
-        }
-
-        public SalaryDataModel GetSalaryByData(string data)
-        {
-            _logger.LogInformation("GetSalaryByData for data: {data}", data);
-            if (data == null)
-                throw new ArgumentNullException(nameof(data));
-            if (string.IsNullOrEmpty(data))
-                throw new ArgumentNullException(nameof(data));
-            if (!data.IsGuid())
-                throw new ValidationException("data must be a GUID");
-
-            var salary = _salaryStorageContact.GetElementById(data) ?? throw new ElementNotFoundException(data);
-            if (_pekarStorageContact.GetElementById(salary.PekarId) == null)
-                throw new ElementNotFoundException(salary.PekarId);
-            return salary;
-        }
-
-        public void InsertSalary(SalaryDataModel salary)
-        {
-            _logger.LogInformation("InsertSalary: {json}", JsonSerializer.Serialize(salary));
-            if (salary == null)
-                throw new ArgumentNullException(nameof(salary));
-            salary.Validate();
-            if (_pekarStorageContact.GetElementById(salary.PekarId) == null)
-                throw new ElementNotFoundException(salary.PekarId);
-            _salaryStorageContact.AddElement(salary);
-        }
-
-        public void UpdateSalary(SalaryDataModel salary)
-        {
-            _logger.LogInformation("UpdateSalary: {json}", JsonSerializer.Serialize(salary));
-            if (salary == null)
-                throw new ArgumentNullException(nameof(salary));
-            salary.Validate();
-            if (_pekarStorageContact.GetElementById(salary.PekarId) == null)
-                throw new ElementNotFoundException(salary.PekarId);
-            _salaryStorageContact.UpdateElement(salary);
-        }
-
-        public void DeleteSalary(string id)
-        {
-            _logger.LogInformation("DeleteSalary for id: {id}", id);
-            if (id == null)
-                throw new ArgumentNullException(nameof(id));
-            if (string.IsNullOrEmpty(id))
-                throw new ArgumentNullException(nameof(id));
-            if (!id.IsGuid())
-                throw new ValidationException("id must be a GUID");
-
-            var salary = _salaryStorageContact.GetElementById(id);
-            if (salary == null)
-                throw new ElementNotFoundException(id);
-
-            _salaryStorageContact.DeleteElement(id);
-        }
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/Infrastructure/IValidation.cs
+++ b/CandyHouseSolution/CandyHouseBase/Infrastructure/IValidation.cs
@@ -1,7 +0,0 @@
-namespace CandyHouseBase.Infrastructure
-{
-    public interface IValidation
-    {
-        void Validate();
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/Interfaces/BusinessLogicsContracts/IIngredientBusinessLogicContact.cs
+++ b/CandyHouseSolution/CandyHouseBase/Interfaces/BusinessLogicsContracts/IIngredientBusinessLogicContact.cs
@@ -1,14 +0,0 @@
-using System.Collections.Generic;
-using CandyHouseBase.DataModels;
-
-namespace CandyHouseBase.Interfaces.BusinessLogicsContracts
-{
-    public interface IIngredientBusinessLogicContact
-    {
-        List<IngredientDataModel> GetAllIngredients();
-        IngredientDataModel GetIngredientByData(string data);
-        void InsertIngredient(IngredientDataModel ingredient);
-        void UpdateIngredient(IngredientDataModel ingredient);
-        void DeleteIngredient(string id);
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/Interfaces/BusinessLogicsContracts/IOrderBusinessLogicContact.cs
+++ b/CandyHouseSolution/CandyHouseBase/Interfaces/BusinessLogicsContracts/IOrderBusinessLogicContact.cs
@@ -1,14 +0,0 @@
-using System.Collections.Generic;
-using CandyHouseBase.DataModels;
-
-namespace CandyHouseBase.Interfaces.BusinessLogicsContracts
-{
-    public interface IOrderBusinessLogicContact
-    {
-        List<OrderDataModel> GetAllOrders();
-        OrderDataModel GetOrderByData(string data);
-        void InsertOrder(OrderDataModel order);
-        void UpdateOrder(OrderDataModel order);
-        void DeleteOrder(string id);
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/Interfaces/BusinessLogicsContracts/IPekarBusinessLogicContact.cs
+++ b/CandyHouseSolution/CandyHouseBase/Interfaces/BusinessLogicsContracts/IPekarBusinessLogicContact.cs
@@ -1,16 +0,0 @@
-using System.Collections.Generic;
-using CandyHouseBase.DataModels;
-
-namespace CandyHouseBase.Interfaces.BusinessLogicsContracts
-{
-    public interface IPekarBusinessLogicContact
-    {
-        List<PekarDataModel> GetAllPekars();
-        List<PekarDataModel> GetAllDataOfPekar(string pekarId);
-        PekarDataModel GetPekarByData(string data);
-        void InsertPekar(PekarDataModel order);
-        void UpdatePekar(PekarDataModel order);
-        void DeletePekar(string id);
-        void RestorePekar(string id);
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/Interfaces/BusinessLogicsContracts/IPositionBusinessLogicContact.cs
+++ b/CandyHouseSolution/CandyHouseBase/Interfaces/BusinessLogicsContracts/IPositionBusinessLogicContact.cs
@@ -1,14 +0,0 @@
-using System.Collections.Generic;
-using CandyHouseBase.DataModels;
-
-namespace CandyHouseBase.Interfaces.BusinessLogicsContracts
-{
-    public interface IPositionBusinessLogicContact
-    {
-        List<PositionDataModel> GetAllPositions();
-        PositionDataModel GetPositionByData(string data);
-        void InsertPosition(PositionDataModel position);
-        void UpdatePosition(PositionDataModel position);
-        void DeletePosition(string id);
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/Interfaces/BusinessLogicsContracts/IProductBusinessLogicContact.cs
+++ b/CandyHouseSolution/CandyHouseBase/Interfaces/BusinessLogicsContracts/IProductBusinessLogicContact.cs
@@ -1,14 +0,0 @@
-using System.Collections.Generic;
-using CandyHouseBase.DataModels;
-
-namespace CandyHouseBase.Interfaces.BusinessLogicsContracts
-{
-    public interface IProductBusinessLogicContact
-    {
-        List<ProductDataModel> GetAllProducts();
-        ProductDataModel GetProductByData(string data);
-        void InsertProduct(ProductDataModel product);
-        void UpdateProduct(ProductDataModel product);
-        void DeleteProduct(string id);
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/Interfaces/BusinessLogicsContracts/ISalaryBusinessLogicContact.cs
+++ b/CandyHouseSolution/CandyHouseBase/Interfaces/BusinessLogicsContracts/ISalaryBusinessLogicContact.cs
@@ -1,14 +0,0 @@
-using System.Collections.Generic;
-using CandyHouseBase.DataModels;
-
-namespace CandyHouseBase.Interfaces.BusinessLogicsContracts
-{
-    public interface ISalaryBusinessLogicContact
-    {
-        List<SalaryDataModel> GetAllSalaries();
-        SalaryDataModel GetSalaryByData(string data);
-        void InsertSalary(SalaryDataModel salary);
-        void UpdateSalary(SalaryDataModel salary);
-        void DeleteSalary(string id);
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/Interfaces/StoragesContracts/IIngredientStorageContact.cs
+++ b/CandyHouseSolution/CandyHouseBase/Interfaces/StoragesContracts/IIngredientStorageContact.cs
@@ -1,15 +0,0 @@
-using System.Collections.Generic;
-using CandyHouseBase.DataModels;
-
-namespace CandyHouseBase.Interfaces.StoragesContracts
-{
-    public interface IIngredientStorageContact
-    {
-        List<IngredientDataModel> GetList();
-        IngredientDataModel GetElementById(string id);
-        IngredientDataModel GetElementByName(string name);
-        void AddElement(IngredientDataModel ingredient);
-        void UpdateElement(IngredientDataModel ingredient);
-        void DeleteElement(string id);
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/Interfaces/StoragesContracts/IOrderStorageContact.cs
+++ b/CandyHouseSolution/CandyHouseBase/Interfaces/StoragesContracts/IOrderStorageContact.cs
@@ -1,14 +0,0 @@
-using System.Collections.Generic;
-using CandyHouseBase.DataModels;
-
-namespace CandyHouseBase.Interfaces.StoragesContracts
-{
-    public interface IOrderStorageContact
-    {
-        List<OrderDataModel> GetOrders();
-        void AddElement(OrderDataModel order);
-        void UpdateElement(OrderDataModel order);
-        void DeleteElement(OrderDataModel order);
-        OrderDataModel GetElementById(string orderId);
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/Interfaces/StoragesContracts/IPekarStorageContact.cs
+++ b/CandyHouseSolution/CandyHouseBase/Interfaces/StoragesContracts/IPekarStorageContact.cs
@@ -1,17 +0,0 @@
-using System.Collections.Generic;
-using CandyHouseBase.DataModels;
-
-namespace CandyHouseBase.Interfaces.StoragesContracts
-{
-    public interface IPekarStorageContact
-    {
-        List<PekarDataModel> GetList();
-        List<PekarDataModel> GetPekarWithHistory(string id);
-        PekarDataModel GetElementById(string id);
-        PekarDataModel GetElementByFio(string fio);
-        void AddElement(PekarDataModel item);
-        void UpdateElement(PekarDataModel item);
-        void DeleteElement(string id);
-        void RestoreElement(string id);
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/Interfaces/StoragesContracts/IPositionStorageContact.cs
+++ b/CandyHouseSolution/CandyHouseBase/Interfaces/StoragesContracts/IPositionStorageContact.cs
@@ -1,16 +0,0 @@
-using System.Collections.Generic;
-using CandyHouseBase.DataModels;
-
-namespace CandyHouseBase.Interfaces.StoragesContracts
-{
-    public interface IProductStorageContact
-    {
-        List<ProductDataModel> GetList();
-        ProductDataModel GetElementById(string id);
-        ProductDataModel GetElementByName(string name);
-        ProductDataModel GetElementByOldName(string name);
-        void AddElement(ProductDataModel element);
-        void UpdateElement(ProductDataModel element);
-        void DeleteElement(string id);
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/Interfaces/StoragesContracts/IProductStorageContact.cs
+++ b/CandyHouseSolution/CandyHouseBase/Interfaces/StoragesContracts/IProductStorageContact.cs
@@ -1,14 +0,0 @@
-using System.Collections.Generic;
-using CandyHouseBase.DataModels;
-
-namespace CandyHouseBase.Interfaces.StoragesContracts
-{
-    public interface IPositionStorageContact
-    {
-        List<PositionDataModel> GetList();
-        PositionDataModel GetElementById(string id);
-        void AddElement(PositionDataModel element);
-        void UpdateElement(PositionDataModel element);
-        void DeleteElement(string id);
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/Interfaces/StoragesContracts/ISalaryStorageContact.cs
+++ b/CandyHouseSolution/CandyHouseBase/Interfaces/StoragesContracts/ISalaryStorageContact.cs
@@ -1,14 +0,0 @@
-using System.Collections.Generic;
-using CandyHouseBase.DataModels;
-
-namespace CandyHouseBase.Interfaces.StoragesContracts
-{
-    public interface ISalaryStorageContact
-    {
-        List<SalaryDataModel> GetList();
-        SalaryDataModel GetElementById(string id);
-        void AddElement(SalaryDataModel element);
-        void UpdateElement(SalaryDataModel element);
-        void DeleteElement(string id);
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/Program.cs
+++ b/CandyHouseSolution/CandyHouseBase/Program.cs
@@ -1,9 +0,0 @@
-namespace CandyHouseBase
-{
-    public class Program
-    {
-        public static void Main(string[] args)
-        {
-        }
-    }
-}
--- a/CandyHouseSolution/CandyHouseBusinessLogic/CandyHouseBusinessLogic.csproj
+++ b/CandyHouseSolution/CandyHouseBusinessLogic/CandyHouseBusinessLogic.csproj
@@ -0,0 +1,21 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net9.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+    <ItemGroup>
+        <InternalsVisibleTo Include="CandyHouseTests" />
+        <InternalsVisibleTo Include="CandyHouseWebApi" />
+        <InternalsVisibleTo Include="DynamicProxyGenAssembly2" />
+    </ItemGroup>
+    <ItemGroup>
+        <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="9.0.2" />
+    </ItemGroup>
+
+    <ItemGroup>
+        <ProjectReference Include="..\CandyHouseContracts\CandyHouseContracts.csproj" />
+    </ItemGroup>
+
+</Project>
--- a/CandyHouseSolution/CandyHouseBusinessLogic/Implementations/ClientBusinessLogicContract.cs
+++ b/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);
+    }
+}
--- a/CandyHouseSolution/CandyHouseBusinessLogic/Implementations/EmployeeBusinessLogicContract.cs
+++ b/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);
+    }
+}
--- a/CandyHouseSolution/CandyHouseBusinessLogic/Implementations/PostBusinessLogicContract.cs
+++ b/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);
+    }
+}
--- a/CandyHouseSolution/CandyHouseBusinessLogic/Implementations/ProductBusinessLogicContract.cs
+++ b/CandyHouseSolution/CandyHouseBusinessLogic/Implementations/ProductBusinessLogicContract.cs
@@ -0,0 +1,83 @@
+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 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);
+    }
+}
--- a/CandyHouseSolution/CandyHouseBusinessLogic/Implementations/SalaryBusinessLogicContract.cs
+++ b/CandyHouseSolution/CandyHouseBusinessLogic/Implementations/SalaryBusinessLogicContract.cs
@@ -0,0 +1,67 @@
+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.Threading.Tasks;
+
+namespace CandyHouseBusinessLogic.Implementations;
+public class SalaryBusinessLogicContract(ISalaryStorageContract salaryStorageContract,ISaleStorageContract saleStorageContract,
+    IPostStorageContract postStorageContract, IEmployeeStorageContract employeeStorageContract, ILogger logger) : 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;
+    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)?.Sum(x => x.Sum) ??
+                throw new NullListException();
+            var post = _postStorageContract.GetElementById(employee.PostId) ??
+                throw new NullListException();
+            var salary = post.Salary + sales * 0.1;
+            _logger.LogDebug("The employee {employeeId} was paid a salary of {salary}", employee.Id, salary);
+            _salaryStorageContract.AddElement(new SalaryDataModel(employee.Id, DateTime.SpecifyKind(finishDate, DateTimeKind.Utc), salary));
+        }
+    }
+}
--- a/CandyHouseSolution/CandyHouseBusinessLogic/Implementations/SaleBusinessLogicContract.cs
+++ b/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: {buyerId}, {fromDate}, {toDate}", clientId, fromDate, toDate);
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        if (clientId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(clientId));
+        }
+        if (!clientId.IsGuid())
+        {
+            throw new ValidationException("The value in the field clientId is not a unique identifier.");
+        }
+        return _saleStorageContract.GetList(fromDate, toDate, clientId: clientId) ?? throw new NullListException();
+    }
+
+    public List<SaleDataModel> 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);
+    }
+}
--- a/CandyHouseSolution/CandyHouseContracts/AdapterContracts/IClientAdapter.cs
+++ b/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);
+}
--- a/CandyHouseSolution/CandyHouseContracts/AdapterContracts/IEmployeeAdapter.cs
+++ b/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);
+}
--- a/CandyHouseSolution/CandyHouseContracts/AdapterContracts/IPostAdapter.cs
+++ b/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);
+}
--- a/CandyHouseSolution/CandyHouseContracts/AdapterContracts/IProductAdapter.cs
+++ b/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);
+}
--- a/CandyHouseSolution/CandyHouseContracts/AdapterContracts/ISalaryAdapter.cs
+++ b/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);
+}
--- a/CandyHouseSolution/CandyHouseContracts/AdapterContracts/ISaleAdapter.cs
+++ b/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);
+}
--- a/CandyHouseSolution/CandyHouseContracts/AdapterContracts/OperationResponses/ClientOperationResponse.cs
+++ b/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);
+}
--- a/CandyHouseSolution/CandyHouseContracts/AdapterContracts/OperationResponses/EmployeeOperationResponse.cs
+++ b/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);
+}
--- a/CandyHouseSolution/CandyHouseContracts/AdapterContracts/OperationResponses/PostOperationResponse.cs
+++ b/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);
+}
--- a/CandyHouseSolution/CandyHouseContracts/AdapterContracts/OperationResponses/ProductOperationResponse.cs
+++ b/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);
+}
--- a/CandyHouseSolution/CandyHouseContracts/AdapterContracts/OperationResponses/SalaryOperationResponse.cs
+++ b/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);
+}
--- a/CandyHouseSolution/CandyHouseContracts/AdapterContracts/OperationResponses/SaleOperationResponse.cs
+++ b/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);
+}
--- a/CandyHouseSolution/CandyHouseContracts/BindingModels/ClientBindingModel.cs
+++ b/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; }
+}
--- a/CandyHouseSolution/CandyHouseContracts/BindingModels/EmployeeBindingModel.cs
+++ b/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; }
+}
--- a/CandyHouseSolution/CandyHouseContracts/BindingModels/PostBindingModel.cs
+++ b/CandyHouseSolution/CandyHouseContracts/BindingModels/PostBindingModel.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 PostBindingModel
+{
+    public string? Id { get; set; }
+
+    public string? PostId => Id;
+
+    public string? PostName { get; set; }
+
+    public string? PostType { get; set; }
+
+    public double Salary { get; set; }
+}
--- a/CandyHouseSolution/CandyHouseContracts/BindingModels/ProductBindingModel.cs
+++ b/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; }
+}
--- a/CandyHouseSolution/CandyHouseContracts/BindingModels/SaleBindingModel.cs
+++ b/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; }
+}
--- a/CandyHouseSolution/CandyHouseContracts/BindingModels/SaleProductBindingModel.cs
+++ b/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; }
+}
--- a/CandyHouseSolution/CandyHouseContracts/BusinessLogicContracts/IClientBusinessLogicContract.cs
+++ b/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);
+}
--- a/CandyHouseSolution/CandyHouseContracts/BusinessLogicContracts/IEmployeeBusinessLogicContract.cs
+++ b/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);
+}
--- a/CandyHouseSolution/CandyHouseContracts/BusinessLogicContracts/IPostBusinessLogicContract.cs
+++ b/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);
+}
--- a/CandyHouseSolution/CandyHouseContracts/BusinessLogicContracts/IProductBusinessLogicContract.cs
+++ b/CandyHouseSolution/CandyHouseContracts/BusinessLogicContracts/IProductBusinessLogicContract.cs
@@ -0,0 +1,23 @@
+using CandyHouseContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.BuisnessLogicContracts;
+
+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);
+}
--- a/CandyHouseSolution/CandyHouseContracts/BusinessLogicContracts/ISalaryBusinessLogicContract.cs
+++ b/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);
+}
--- a/CandyHouseSolution/CandyHouseContracts/BusinessLogicContracts/ISaleBusinessLogicContract.cs
+++ b/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);
+}
--- a/CandyHouseSolution/CandyHouseContracts/CandyHouseContracts.csproj
+++ b/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>
--- a/CandyHouseSolution/CandyHouseContracts/DataModels/ClientDataModel.cs
+++ b/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");
+    }
+}
--- a/CandyHouseSolution/CandyHouseContracts/DataModels/EmployeeDataModel.cs
+++ b/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.Now.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()})");
+    }
+}
--- a/CandyHouseSolution/CandyHouseContracts/DataModels/PostDataModel.cs
+++ b/CandyHouseSolution/CandyHouseContracts/DataModels/PostDataModel.cs
@@ -0,0 +1,33 @@
+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 PostDataModel(string postId, string postName, PostType postType, double salary) : IValidation
+{
+    public string Id { get; private set; } = postId;
+    public string PostName { get; private set; } = postName;
+    public PostType PostType { get; private set; } = postType;
+    public double Salary { get; private set; } = salary;                                
+
+    public 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 (Salary <= 0)
+            throw new ValidationException("Field Salary is empty");
+    }
+}
--- a/CandyHouseSolution/CandyHouseContracts/DataModels/ProductDataModel.cs
+++ b/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");
+    }
+}
--- a/CandyHouseSolution/CandyHouseContracts/DataModels/ProductHistoryDataModel.cs
+++ b/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");
+    }
+}
--- a/CandyHouseSolution/CandyHouseContracts/DataModels/SalaryDataModel.cs
+++ b/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");
+    }
+}
--- a/CandyHouseSolution/CandyHouseContracts/DataModels/SaleDataModel.cs
+++ b/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 BuyerId 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");
+    }
+}
--- a/CandyHouseSolution/CandyHouseContracts/DataModels/SaleProductDataModel.cs
+++ b/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");
+    }
+}
--- a/CandyHouseSolution/CandyHouseContracts/Enums/DiscountType.cs
+++ b/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
+}
--- a/CandyHouseSolution/CandyHouseContracts/Enums/PostType.cs
+++ b/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,
+}
--- a/CandyHouseSolution/CandyHouseContracts/Enums/ProductType.cs
+++ b/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,
+}
--- a/CandyHouseSolution/CandyHouseContracts/Exceptions/ElementDeletedException.cs
+++ b/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})") { }
+}
--- a/CandyHouseSolution/CandyHouseContracts/Exceptions/ElementExistsException.cs
+++ b/CandyHouseSolution/CandyHouseContracts/Exceptions/ElementExistsException.cs
@@ -1,14 +1,18 @@
-using System;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;

-namespace CandyHouseBase.Exceptions;
+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($"There is already an element with value {paramValue} of parameter {paramName}")
+    public ElementExistsException(string paramName, string paramValue) : base($"There is already an element with value{paramValue} of parameter {paramName}")
    {
        ParamName = paramName;
        ParamValue = paramValue;
--- a/CandyHouseSolution/CandyHouseContracts/Exceptions/ElementNotFoundException
+++ b/CandyHouseSolution/CandyHouseContracts/Exceptions/ElementNotFoundException
@@ -1,6 +1,10 @@
-using System;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;

-namespace CandyHouseBase.Exceptions;
+namespace CandyHouseContracts.Exceptions;

 public class ElementNotFoundException : Exception
 {
--- a/CandyHouseSolution/CandyHouseContracts/Exceptions/IncorrectDatesException
+++ b/CandyHouseSolution/CandyHouseContracts/Exceptions/IncorrectDatesException
@@ -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: " +
+        $"{start:dd.MM.YYYY}. EndDate: {end:dd.MM.YYYY}") { }
+}
--- a/CandyHouseSolution/CandyHouseContracts/Exceptions/NullListException.cs
+++ b/CandyHouseSolution/CandyHouseContracts/Exceptions/NullListException.cs
@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.Exceptions;
+
+public class NullListException : Exception
+{
+    public NullListException() : base("The returned list is null") { }
+}
--- a/CandyHouseSolution/CandyHouseContracts/Exceptions/StorageException
+++ b/CandyHouseSolution/CandyHouseContracts/Exceptions/StorageException
@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.Exceptions;
+
+public class StorageException : Exception
+{
+    public StorageException(Exception ex) : base($"Error while working in storage: {ex.Message}", ex) { }
+}
--- a/CandyHouseSolution/CandyHouseContracts/Exceptions/ValidationException.cs
+++ b/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)
+{
+}
--- a/CandyHouseSolution/CandyHouseContracts/Extensions/DateTimeExtensions.cs
+++ b/CandyHouseSolution/CandyHouseContracts/Extensions/DateTimeExtensions.cs
@@ -1,6 +1,10 @@
-using System;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;

-namespace CandyHouseBase.Exceptions;
+namespace CandyHouseContracts.Extensions;

 public static class DateTimeExtensions
 {
--- a/CandyHouseSolution/CandyHouseContracts/Extensions/StringExtensions.cs
+++ b/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 _);
+}
--- a/CandyHouseSolution/CandyHouseContracts/Infrastructure/IConfigurationDatabase.cs
+++ b/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; }
+}
--- a/CandyHouseSolution/CandyHouseContracts/Infrastructure/IValidation.cs
+++ b/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();
+}
+
--- a/CandyHouseSolution/CandyHouseContracts/Infrastructure/OperationResponse.cs
+++ b/CandyHouseSolution/CandyHouseContracts/Infrastructure/OperationResponse.cs
@@ -0,0 +1,47 @@
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.Infrastructure;
+
+public class OperationResponse
+{
+    protected HttpStatusCode StatusCode { get; set; }
+
+    protected object? Result { get; set; }
+
+    public IActionResult GetResponse(HttpRequest request, HttpResponse response)
+    {
+        ArgumentNullException.ThrowIfNull(request);
+        ArgumentNullException.ThrowIfNull(response);
+
+        response.StatusCode = (int)StatusCode;
+
+        if (Result is null)
+        {
+            return new StatusCodeResult((int)StatusCode);
+        }
+
+        return new ObjectResult(Result);
+    }
+
+    protected static TResult OK<TResult, TData>(TData data) where TResult : OperationResponse,
+        new() => new() { StatusCode = HttpStatusCode.OK, Result = data };
+
+    protected static TResult NoContent<TResult>() where TResult : OperationResponse,
+        new() => new() { StatusCode = HttpStatusCode.NoContent };
+
+    protected static TResult BadRequest<TResult>(string? errorMessage = null) where TResult : OperationResponse,
+        new() => new() { StatusCode = HttpStatusCode.BadRequest, Result = errorMessage };
+
+    protected static TResult NotFound<TResult>(string? errorMessage = null) where TResult : OperationResponse,
+        new() => new() { StatusCode = HttpStatusCode.NotFound, Result = errorMessage };
+
+    protected static TResult InternalServerError<TResult>(string? errorMessage = null) where TResult : OperationResponse,
+        new() => new() { StatusCode = HttpStatusCode.InternalServerError, Result = errorMessage };
+}
--- a/CandyHouseSolution/CandyHouseContracts/StoragesContracts/IClientStorageContract.cs
+++ b/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);
+}
--- a/CandyHouseSolution/CandyHouseContracts/StoragesContracts/IEmployeeStorageContract.cs
+++ b/CandyHouseSolution/CandyHouseContracts/StoragesContracts/IEmployeeStorageContract.cs
@@ -0,0 +1,26 @@
+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);
+}
--- a/CandyHouseSolution/CandyHouseContracts/StoragesContracts/IPostStorageContract.cs
+++ b/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);
+}
--- a/CandyHouseSolution/CandyHouseContracts/StoragesContracts/IProductStorageContract.cs
+++ b/CandyHouseSolution/CandyHouseContracts/StoragesContracts/IProductStorageContract.cs
@@ -0,0 +1,19 @@
+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);
+}
--- a/CandyHouseSolution/CandyHouseContracts/StoragesContracts/ISalaryStorageContract.cs
+++ b/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);
+}
--- a/CandyHouseSolution/CandyHouseContracts/StoragesContracts/ISaleStorageContract.cs
+++ b/CandyHouseSolution/CandyHouseContracts/StoragesContracts/ISaleStorageContract.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 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);
+}
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
LivelyPuer	8c4829991d	fix	2025-04-15 00:47:03 +04:00
LivelyPuer	524bfca4d0	ready	2025-04-14 22:46:08 +04:00
LivelyPuer	4113d2ab9e	Merge remote-tracking branch 'origin/lab-4' into lab-4	2025-04-14 22:17:32 +04:00
LivelyPuer	d295b50e32	little update	2025-04-14 22:17:22 +04:00
LivelyPuer	f9966ae73d	little update	2025-04-14 22:15:04 +04:00
LivelyPuer	d84b3850d6	lab4	2025-04-14 22:07:51 +04:00
LivelyPuer	6449c0df73	lab4	2025-04-11 10:16:19 +04:00
LivelyPuer	7beb84b967	lab4 ready	2025-04-11 01:55:51 +04:00
LivelyPuer	082111e301	lab4 ?	2025-04-11 01:36:54 +04:00
LivelyPuer	14b48e3a30	may be work	2025-04-09 11:17:10 +04:00
LivelyPuer	f649754da7	lab4-preready	2025-04-09 01:46:17 +04:00
LivelyPuer	cec7b9240e	Ready full	2025-03-13 16:04:10 +04:00
LivelyPuer	d2f7afae63	lab-3 ready	2025-03-13 13:38:00 +04:00