test fix

lab3-ready
fix
2025-04-15 15:51:05 +04:00 · 2025-04-15 02:40:51 +04:00 · 2025-04-15 01:47:02 +04:00 · 2025-04-15 01:25:50 +04:00 · 2025-03-26 21:51:51 +04:00 · 2025-03-13 15:40:49 +04:00
160 changed files with 8991 additions and 5091 deletions
--- 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">
-            <HintPath>..\packages\Castle.Core.5.1.1\lib\net462\Castle.Core.dll</HintPath>
-        </Reference>
-        <Reference Include="Microsoft.Bcl.AsyncInterfaces, Version=10.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
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-        </Reference>
-        <Reference Include="Microsoft.Extensions.DependencyInjection, Version=10.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60, processorArchitecture=MSIL">
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-        <Reference Include="Microsoft.Extensions.DependencyInjection.Abstractions, Version=10.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60, processorArchitecture=MSIL">
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-        <Reference Include="mscorlib" />
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-        <Reference Include="System"/>
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-        <Reference Include="System.Numerics" />
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-        </Reference>
-        <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="$(MSBuildToolsPath)\Microsoft.CSharp.targets"/>
-    <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
-         Other similar extension points exist, see Microsoft.Common.targets.
-    <Target Name="BeforeBuild">
-    </Target>
-    <Target Name="AfterBuild">
-    </Target>
-    -->
-    <ItemGroup>
-        <AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleTo">
-            <_Parameter1>$(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
@@ -1,39 +0,0 @@
-using System.Collections.Generic;
-using CandyHouseBase.DataModels;
-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()
-        {
-            return new List<IngredientDataModel>();
-        }
-
-        public IngredientDataModel GetIngredientByData(string data)
-        {
-            return new IngredientDataModel("", "", "", 100);
-        }
-
-        public void InsertIngredient(IngredientDataModel ingredient)
-        {
-        }
-
-        public void UpdateIngredient(IngredientDataModel ingredient)
-        {
-        }
-
-        public void DeleteIngredient(string id)
-        {
-        }
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/Implementations/OrderBusinessLogicContract.cs
+++ b/CandyHouseSolution/CandyHouseBase/Implementations/OrderBusinessLogicContract.cs
@@ -1,46 +0,0 @@
-using System;
-using System.Collections.Generic;
-using CandyHouseBase.DataModels;
-using CandyHouseBase.Enums;
-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()
-        {
-            return new List<OrderDataModel>();
-        }
-
-        public OrderDataModel GetOrderByData(string data)
-        {
-            return new OrderDataModel("", "", new DateTime(),
-                100, 100m, "", "", StatusType.Cancelled);
-        }
-
-        public void InsertOrder(OrderDataModel order)
-        {
-        }
-
-        public void UpdateOrder(OrderDataModel order)
-        {
-        }
-
-        public void DeleteOrder(string id)
-        {
-        }
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/Implementations/PekarBusinessLogicContract.cs
+++ b/CandyHouseSolution/CandyHouseBase/Implementations/PekarBusinessLogicContract.cs
@@ -1,55 +0,0 @@
-using System;
-using System.Collections.Generic;
-using CandyHouseBase.DataModels;
-using CandyHouseBase.Enums;
-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()
-        {
-            return new List<PekarDataModel>();
-        }
-
-        public List<PekarDataModel> GetAllDataOfPekar(string pekarId)
-        {
-            return new List<PekarDataModel>();
-        }
-
-        public PekarDataModel GetPekarByData(string data)
-        {
-            return new PekarDataModel("", "", "",
-                0, new List<ProductDataModel>());
-        }
-
-        public void InsertPekar(PekarDataModel order)
-        {
-        }
-
-        public void UpdatePekar(PekarDataModel order)
-        {
-        }
-
-        public void DeletePekar(string id)
-        {
-        }
-
-        public void RestorePekar(string id)
-        {
-        }
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/Implementations/PositionBusinessLogicContract.cs
+++ b/CandyHouseSolution/CandyHouseBase/Implementations/PositionBusinessLogicContract.cs
@@ -1,41 +0,0 @@
-using System;
-using System.Collections.Generic;
-using CandyHouseBase.DataModels;
-using CandyHouseBase.Enums;
-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()
-        {
-            return new List<PositionDataModel>();
-        }
-
-        public PositionDataModel GetPositionByData(string data)
-        {
-            return new PositionDataModel("", PositionType.Cool, "");
-        }
-
-        public void InsertPosition(PositionDataModel position)
-        {
-        }
-
-        public void UpdatePosition(PositionDataModel position)
-        {
-        }
-
-        public void DeletePosition(string id)
-        {
-        }
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/Implementations/ProductBusinessLogicContract.cs
+++ b/CandyHouseSolution/CandyHouseBase/Implementations/ProductBusinessLogicContract.cs
@@ -1,43 +0,0 @@
-using System;
-using System.Collections.Generic;
-using CandyHouseBase.DataModels;
-using CandyHouseBase.Enums;
-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()
-        {
-            return new List<ProductDataModel>();
-        }
-
-        public ProductDataModel GetProductByData(string data)
-        {
-            return new ProductDataModel("", "", "", new List<IngredientDataModel>());
-        }
-
-        public void InsertProduct(ProductDataModel product)
-        {
-        }
-
-        public void UpdateProduct(ProductDataModel product)
-        {
-        }
-
-        public void DeleteProduct(string id)
-        {
-        }
-    }
-}
--- a/CandyHouseSolution/CandyHouseBase/Implementations/SalaryBusinessLogicContract.cs
+++ b/CandyHouseSolution/CandyHouseBase/Implementations/SalaryBusinessLogicContract.cs
@@ -1,45 +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()
-        {
-            return new List<SalaryDataModel>();
-        }
-
-        public SalaryDataModel GetSalaryByData(string data)
-        {
-            return new SalaryDataModel("", "", new DateTime(), 0, 0, 0);
-        }
-
-        public void InsertSalary(SalaryDataModel salary)
-        {
-        }
-
-        public void UpdateSalary(SalaryDataModel salary)
-        {
-        }
-
-        public void DeleteSalary(string 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 +1,20 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net9.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+    <ItemGroup>
+        <InternalsVisibleTo Include="CandyHouseTests" />
+        <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 +1,75 @@
+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;
+
+internal 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;
+
+internal 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;
+
+internal class PostBusinessLogicContract(IPostStorageContract postStorageContract, ILogger logger) : IPostBusinessLogicContract
+{
+    private readonly ILogger _logger = logger;
+    private readonly IPostStorageContract _postStorageContract = postStorageContract;
+    public List<PostDataModel> GetAllPosts(bool onlyActive = true)
+    {
+        _logger.LogInformation("GetAllPosts params: {onlyActive}", onlyActive);
+        return _postStorageContract.GetList(onlyActive) ?? 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;
+
+internal 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;
+internal 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, finishDate, salary));
+        }
+    }
+}
--- a/CandyHouseSolution/CandyHouseBusinessLogic/Implementations/SaleBusinessLogicContract.cs
+++ b/CandyHouseSolution/CandyHouseBusinessLogic/Implementations/SaleBusinessLogicContract.cs
@@ -0,0 +1,125 @@
+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;
+
+internal class SaleBusinessLogicContract(ISaleStorageContract saleStorageContract, IStorageStorageContract storageStorageContract, ILogger logger) : ISaleBusinessLogicContract
+{
+    private readonly ILogger _logger = logger;
+    private readonly ISaleStorageContract _saleStorageContract = saleStorageContract;
+    private readonly IStorageStorageContract _storageStorageContract = storageStorageContract;
+
+    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();
+        if (!_storageStorageContract.CheckComponents(saleDataModel))
+        {
+            throw new InsufficientException("Dont have product in storage");
+        }
+        _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/CandyHouseBusinessLogic/Implementations/StorageBusinessLogicContract.cs
+++ b/CandyHouseSolution/CandyHouseBusinessLogic/Implementations/StorageBusinessLogicContract.cs
@@ -0,0 +1,74 @@
+using CandyHouseContracts.BusinessLogicContracts;
+using CandyHouseContracts.DataModels;
+using CandyHouseContracts.Enums;
+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 StorageBusinessLogicContract(IStorageStorageContract storageStorageContract, ILogger logger) : IStorageBusinessLogicContract
+{
+    private readonly IStorageStorageContract _storageStorageContract = storageStorageContract;
+    private readonly ILogger _logger = logger;
+    public List<StorageDataModel> GetAllComponents()
+    {
+        _logger.LogInformation("GetAllComponents");
+        return _storageStorageContract.GetList() ?? throw new NullListException();
+
+        return [];
+    }
+
+    public StorageDataModel GetComponentByData(string data)
+    {
+        _logger.LogInformation("Get element by data: {data}", data);
+        if (data.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+        if (!data.IsGuid())
+        {
+            throw new ElementNotFoundException(data);
+        }
+        return _storageStorageContract.GetElementById(data) ?? throw new ElementNotFoundException(data);
+
+        return new("", ProductType.None, 0, []);
+    }
+
+    public void InsertComponent(StorageDataModel storageDataModel)
+    {
+        _logger.LogInformation("New data: {json}", JsonSerializer.Serialize(storageDataModel));
+        ArgumentNullException.ThrowIfNull(storageDataModel);
+        storageDataModel.Validate();
+        _storageStorageContract.AddElement(storageDataModel);
+    }
+
+    public void UpdateComponent(StorageDataModel storageDataModel)
+    {
+        _logger.LogInformation("Update data: {json}", JsonSerializer.Serialize(storageDataModel));
+        ArgumentNullException.ThrowIfNull(storageDataModel);
+        storageDataModel.Validate();
+        _storageStorageContract.UpdElement(storageDataModel);
+    }
+
+    public void DeleteComponent(string id)
+    {
+        logger.LogInformation("Delete by id: {id}", id);
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("Id is not a unique identifier");
+        }
+        _storageStorageContract.DelElement(id);
+    }
+}
--- a/CandyHouseSolution/CandyHouseBusinessLogic/Implementations/SuppliesBusinessLogicContract.cs
+++ b/CandyHouseSolution/CandyHouseBusinessLogic/Implementations/SuppliesBusinessLogicContract.cs
@@ -0,0 +1,61 @@
+using CandyHouseContracts.BusinessLogicContracts;
+using CandyHouseContracts.DataModels;
+using CandyHouseContracts.Enums;
+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 SuppliesBusinessLogicContract(ISuppliesStorageContract suppliesStorageContract, ILogger logger) : ISuppliesBusinessLogicContract
+{
+    private readonly ISuppliesStorageContract _suppliesStorageContract = suppliesStorageContract;
+    private readonly ILogger _logger = logger;
+
+    public List<SuppliesDataModel> GetAllComponents()
+    {
+        _logger.LogInformation("GetAllComponents");
+        return _suppliesStorageContract.GetList() ?? throw new NullListException();
+
+        return [];
+    }
+
+    public SuppliesDataModel GetComponentByData(string data)
+    {
+        _logger.LogInformation("Get element by data: {data}", data);
+        if (data.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+        if (!data.IsGuid())
+        {
+            throw new ElementNotFoundException(data);
+        }
+        return _suppliesStorageContract.GetElementById(data) ?? throw new ElementNotFoundException(data);
+
+        return new("", ProductType.None, DateTime.UtcNow, 0, []);
+    }
+
+    public void InsertComponent(SuppliesDataModel suppliesDataModel)
+    {
+        _logger.LogInformation("New data: {json}", JsonSerializer.Serialize(suppliesDataModel));
+        ArgumentNullException.ThrowIfNull(suppliesDataModel);
+        suppliesDataModel.Validate();
+        _suppliesStorageContract.AddElement(suppliesDataModel);
+    }
+
+    public void UpdateComponent(SuppliesDataModel suppliesDataModel)
+    {
+        _logger.LogInformation("Update data: {json}", JsonSerializer.Serialize(suppliesDataModel));
+        ArgumentNullException.ThrowIfNull(suppliesDataModel);
+        suppliesDataModel.Validate();
+        _suppliesStorageContract.UpdElement(suppliesDataModel);
+    }
+}
--- 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(bool onlyActive);
+
+    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/BusinessLogicContracts/IStorageBusinessLogicContract.cs
+++ b/CandyHouseSolution/CandyHouseContracts/BusinessLogicContracts/IStorageBusinessLogicContract.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.BusinessLogicContracts;
+
+public interface IStorageBusinessLogicContract
+{
+    List<StorageDataModel> GetAllComponents();
+    StorageDataModel GetComponentByData(string data);
+    void InsertComponent(StorageDataModel storageDataModel);
+    void UpdateComponent(StorageDataModel storageDataModel);
+    void DeleteComponent(string id);
+}
--- a/CandyHouseSolution/CandyHouseContracts/BusinessLogicContracts/ISuppliesBusinessLogicContract.cs
+++ b/CandyHouseSolution/CandyHouseContracts/BusinessLogicContracts/ISuppliesBusinessLogicContract.cs
@@ -0,0 +1,16 @@
+using CandyHouseContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.BusinessLogicContracts;
+
+public interface ISuppliesBusinessLogicContract
+{
+    List<SuppliesDataModel> GetAllComponents();
+    SuppliesDataModel GetComponentByData(string data);
+    void InsertComponent(SuppliesDataModel componentDataModel);
+    void UpdateComponent(SuppliesDataModel componentDataModel);
+}
--- a/CandyHouseSolution/CandyHouseContracts/CandyHouseContracts.csproj
+++ b/CandyHouseSolution/CandyHouseContracts/CandyHouseContracts.csproj
@@ -0,0 +1,9 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net9.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+
+</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}$"))
+            throw new ValidationException("Field PhoneNumber is not a phone number");
+    }
+}
--- a/CandyHouseSolution/CandyHouseContracts/DataModels/EmployeeDataModel.cs
+++ b/CandyHouseSolution/CandyHouseContracts/DataModels/EmployeeDataModel.cs
@@ -0,0 +1,61 @@
+using CandyHouseContracts.Exceptions;
+using CandyHouseContracts.Extensions;
+using CandyHouseContracts.Infrastructure;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Text.RegularExpressions;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.DataModels;
+
+public class EmployeeDataModel(string id, string fio, string email, string postId, DateTime birthDate, DateTime employmentDate, bool isDeleted) : IValidation
+{
+    public string Id { get; private set; } = id;
+
+    public string FIO { get; private set; } = fio;
+
+    public string Email { get; private set; } = email;
+
+    public string PostId { get; private set; } = postId;
+
+    public DateTime BirthDate { get; private set; } = birthDate;
+
+    public DateTime EmploymentDate { get; private set; } = employmentDate;
+
+    public bool IsDeleted { get; private set; } = isDeleted;
+
+    public void Validate()
+    {
+        if (Id.IsEmpty())
+            throw new ValidationException("Field Id is empty");
+
+        if (!Id.IsGuid())
+            throw new ValidationException("The value in the field Id is not a unique identifier");
+
+        if (FIO.IsEmpty())
+            throw new ValidationException("Field FIO is empty");
+
+        if (Email.IsEmpty())
+            throw new ValidationException("Field Email is empty");
+
+        if (!Regex.IsMatch(Email, @"^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$"))
+            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 +1,35 @@
+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 id, string postName, PostType postType, double salary, bool isActual, DateTime changeDate) : IValidation
+{
+    public string Id { get; private set; } = id;
+    public string PostName { get; private set; } = postName;
+    public PostType PostType { get; private set; } = postType;
+    public double Salary { get; private set; } = salary;
+    public bool IsActual { get; private set; } = isActual;
+    public DateTime ChangeDate { get; private set; } = changeDate;                                          
+
+    public void Validate()
+    {
+        if (Id.IsEmpty())
+            throw new ValidationException("Field Id is empty");
+        if (!Id.IsGuid())
+            throw new ValidationException("The value in the field Id is not a unique identifier");
+        if (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 +1,31 @@
+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
+{
+    public string ProductId { get; private set; } = productId;
+
+    public double OldPrice { get; private set; } = oldPrice;
+
+    public DateTime ChangeDate { get; private set; } = DateTime.UtcNow;
+
+    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/ProductStorageDataModel.cs
+++ b/CandyHouseSolution/CandyHouseContracts/DataModels/ProductStorageDataModel.cs
@@ -0,0 +1,32 @@
+using CandyHouseContracts.Exceptions;
+using CandyHouseContracts.Extensions;
+using CandyHouseContracts.Infrastructure;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.DataModels;
+
+public class ProductStorageDataModel(string storageId, string productId, int count) : IValidation
+{
+    public string StorageId { get; private set; } = storageId;
+    public string ProductId { get; private set; } = productId;
+    public int Count { get; private set; } = count;
+
+    public void Validate()
+    {
+        if (StorageId.IsEmpty())
+            throw new ValidationException("Field StorageId is empty");
+        if (!StorageId.IsGuid())
+            throw new ValidationException("The value in the field StorageId 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");
+    }
+}
--- a/CandyHouseSolution/CandyHouseContracts/DataModels/ProductSuppliesDataModel.cs
+++ b/CandyHouseSolution/CandyHouseContracts/DataModels/ProductSuppliesDataModel.cs
@@ -0,0 +1,32 @@
+using CandyHouseContracts.Exceptions;
+using CandyHouseContracts.Extensions;
+using CandyHouseContracts.Infrastructure;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.DataModels;
+
+public class ProductSuppliesDataModel(string suppliesId, string productId, int count) : IValidation
+{
+    public string SuppliesId { get; private set; } = suppliesId;
+    public string ProductId { get; private set; } = productId;
+    public int Count { get; private set; } = count;
+
+    public void Validate()
+    {
+        if (SuppliesId.IsEmpty())
+            throw new ValidationException("Field SuppliesId is empty");
+        if (!SuppliesId.IsGuid())
+            throw new ValidationException("The value in the field SuppliesId is not a unique identifier");
+        if (ProductId.IsEmpty())
+            throw new ValidationException("Field ProductId is empty");
+        if (!ProductId.IsGuid())
+            throw new ValidationException("The value in the field BlandId is not a unique identifier");
+        if (Count <= 0)
+            throw new ValidationException("Field Count is less than or equal to 0");
+    }
+}
--- a/CandyHouseSolution/CandyHouseContracts/DataModels/SalaryDataModel.cs
+++ b/CandyHouseSolution/CandyHouseContracts/DataModels/SalaryDataModel.cs
@@ -0,0 +1,31 @@
+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
+{
+    public string EmployeeId { get; private set; } = employeeId;
+
+    public DateTime SalaryDate { get; private set; } = salaryDate;
+
+    public double Salary { get; private set; } = employeeSalary;
+
+    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 +1,56 @@
+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(string id, string employeeId, string? clientId, double sum, DiscountType discountType,
+    double discount, bool isCancel, List<SaleProductDataModel> saleProducts) : IValidation
+{
+    public string Id { get; private set; } = id;
+
+    public string EmployeeId { get; private set; } = employeeId;
+
+    public string? ClientId { get; private set; } = clientId;
+
+    public DateTime SaleDate { get; private set; } = DateTime.UtcNow;
+    public double Sum { get; private set; } = sum;
+
+    public DiscountType DiscountType { get; private set; } = discountType;
+
+    public double Discount { get; private set; } = discount;
+
+    public bool IsCancel { get; private set; } = isCancel;
+
+    public List<SaleProductDataModel> Products { get; private set; } = saleProducts;
+
+    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 +1,37 @@
+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 SaleProductDataModel(string saleId, string productId, int count) : IValidation
+{
+    public string SaleId { get; private set; } = saleId;
+
+    public string ProductId { get; private set; } = productId;
+
+    public int Count { get; private set; } = count;
+
+    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");
+    }
+}
--- a/CandyHouseSolution/CandyHouseContracts/DataModels/StorageDataModel.cs
+++ b/CandyHouseSolution/CandyHouseContracts/DataModels/StorageDataModel.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 StorageDataModel(string id, ProductType productType, int count, List<ProductStorageDataModel> products) : IValidation
+{
+    public string Id { get; private set; } = id;
+    public ProductType Type { get; private set; } = productType;
+    public int Count { get; private set; } = count;
+    public List<ProductStorageDataModel> Products { get; private set; } = 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 (Type == ProductType.None)
+            throw new ValidationException("Field Type is empty");
+        if (Count <= 0)
+            throw new ValidationException("Field Count is less than or equal to 0");
+        if ((Products?.Count ?? 0) == 0)
+            throw new ValidationException("The sale must include products");
+    }
+}
--- a/CandyHouseSolution/CandyHouseContracts/DataModels/SuppliesDataModel.cs
+++ b/CandyHouseSolution/CandyHouseContracts/DataModels/SuppliesDataModel.cs
@@ -0,0 +1,35 @@
+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;
+using static System.Runtime.InteropServices.JavaScript.JSType;
+
+namespace CandyHouseContracts.DataModels;
+
+public class SuppliesDataModel(string id, ProductType productType, DateTime date, int count, List<ProductSuppliesDataModel> products) : IValidation
+{
+    public string Id { get; private set; } = id;
+    public ProductType Type { get; private set; } = productType;
+    public DateTime OrderDate { get; private set; } = date;
+    public int Count { get; private set; } = count;
+    public List<ProductSuppliesDataModel> Products { get; private set; } = 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 (Type == ProductType.None)
+            throw new ValidationException("Field Type is empty");
+        if (Count <= 0)
+            throw new ValidationException("Field Count is less than or equal to 0");
+        if ((Products?.Count ?? 0) == 0)
+            throw new ValidationException("The sale must include products");
+    }
+}
--- 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 +1,16 @@
+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
@@ -1,16 +1,20 @@
-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
 {
@@ -10,4 +14,4 @@ public class ElementNotFoundException : Exception
    {
        Value = value;
    }
-}
+}
--- 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: " +
+        $"{start:dd.MM.YYYY}. EndDate: {end:dd.MM.YYYY}") { }
+}
--- a/CandyHouseSolution/CandyHouseContracts/Exceptions/InsufficientException.cs
+++ b/CandyHouseSolution/CandyHouseContracts/Exceptions/InsufficientException.cs
@@ -0,0 +1,11 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.Exceptions;
+
+public class InsufficientException(string message) : Exception(message)
+{
+}
--- a/CandyHouseSolution/CandyHouseContracts/Exceptions/NullListException.cs
+++ b/CandyHouseSolution/CandyHouseContracts/Exceptions/NullListException.cs
@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.Exceptions;
+
+public class NullListException : Exception
+{
+    public NullListException() : base("The returned list is null") { }
+}
--- a/CandyHouseSolution/CandyHouseContracts/Exceptions/StorageException
+++ b/CandyHouseSolution/CandyHouseContracts/Exceptions/StorageException
@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.Exceptions;
+
+public class StorageException : Exception
+{
+    public StorageException(Exception ex) : base($"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
 {
@@ -8,4 +12,4 @@ public static class DateTimeExtensions
    {
        return date >= olderDate;
    }
-}
+}
--- 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/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(bool onlyActual = true);
+    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/CandyHouseSolution/CandyHouseContracts/StoragesContracts/IStorageStorageContract.cs
+++ b/CandyHouseSolution/CandyHouseContracts/StoragesContracts/IStorageStorageContract.cs
@@ -0,0 +1,18 @@
+using CandyHouseContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.StoragesContracts;
+
+public interface IStorageStorageContract
+{
+    List<StorageDataModel> GetList();
+    StorageDataModel GetElementById(string id);
+    void AddElement(StorageDataModel storageDataModel);
+    void UpdElement(StorageDataModel storageDataModel);
+    void DelElement(string id);
+    bool CheckComponents(SaleDataModel saleDataModel);
+}
--- a/CandyHouseSolution/CandyHouseContracts/StoragesContracts/ISuppliesStorageContract.cs
+++ b/CandyHouseSolution/CandyHouseContracts/StoragesContracts/ISuppliesStorageContract.cs
@@ -0,0 +1,16 @@
+using CandyHouseContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseContracts.StoragesContracts;
+
+public interface ISuppliesStorageContract
+{
+    List<SuppliesDataModel> GetList(DateTime? startDate = null);
+    SuppliesDataModel GetElementById(string id);
+    void AddElement(SuppliesDataModel suppliesDataModel);
+    void UpdElement(SuppliesDataModel suppliesDataModel);
+}
--- a/CandyHouseSolution/CandyHouseDatabase/CandyHouseDatabase.csproj
+++ b/CandyHouseSolution/CandyHouseDatabase/CandyHouseDatabase.csproj
@@ -0,0 +1,23 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net9.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <PackageReference Include="AutoMapper" Version="14.0.0" />
+        <PackageReference Include="Microsoft.EntityFrameworkCore" Version="9.0.2" />
+        <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="9.0.3" />
+    </ItemGroup>
+
+    <ItemGroup>
+        <ProjectReference Include="..\CandyHouseContracts\CandyHouseContracts.csproj" />
+    </ItemGroup>
+    <ItemGroup>
+        <InternalsVisibleTo Include="CandyHouseTests" />
+        <InternalsVisibleTo Include="DynamicProxyGenAssembly2" />
+    </ItemGroup>
+
+</Project>
--- a/CandyHouseSolution/CandyHouseDatabase/CandyHouseDbContext.cs
+++ b/CandyHouseSolution/CandyHouseDatabase/CandyHouseDbContext.cs
@@ -0,0 +1,66 @@
+using CandyHouseContracts.Infrastructure;
+using CandyHouseDatabase.Models;
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseDatabase;
+
+public class CandyHouseDbContext(IConfigurationDatabase configurationDatabase) : DbContext
+{
+    private readonly IConfigurationDatabase? _configurationDatabase = configurationDatabase;
+
+    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
+    {
+        optionsBuilder.UseNpgsql(_configurationDatabase?.ConnectionString, o => o.SetPostgresVersion(12, 2));
+        base.OnConfiguring(optionsBuilder);
+    }
+
+    protected override void OnModelCreating(ModelBuilder modelBuilder)
+    {
+        base.OnModelCreating(modelBuilder);
+
+        modelBuilder.Entity<Client>().HasIndex(x => x.PhoneNumber).IsUnique();
+
+        modelBuilder.Entity<Product>().HasIndex(x => x.ProductName).IsUnique();
+
+        modelBuilder.Entity<Post>()
+            .HasIndex(e => new { e.PostName, e.IsActual })
+            .IsUnique()
+            .HasFilter($"\"{nameof(Post.IsActual)}\" = TRUE");
+
+        modelBuilder.Entity<Post>()
+            .HasIndex(e => new { e.PostId, e.IsActual })
+            .IsUnique()
+            .HasFilter($"\"{nameof(Post.IsActual)}\" = TRUE");
+
+        modelBuilder.Entity<SaleProduct>().HasKey(x => new { x.SaleId, x.ProductId });
+
+        modelBuilder.Entity<ProductSupplies>().HasKey(x => new { x.SuppliesId, x.ProductId });
+
+        modelBuilder.Entity<ProductStorage>().HasKey(x => new { x.StorageId, x.ProductId });
+    }
+
+    public DbSet<Client> Clients { get; set; }
+
+    public DbSet<Post> Posts { get; set; }
+
+    public DbSet<Product> Products { get; set; }
+
+    public DbSet<ProductHistory> ProductHistories { get; set; }
+
+    public DbSet<Salary> Salaries { get; set; }
+
+    public DbSet<Sale> Sales { get; set; }
+
+    public DbSet<SaleProduct> SaleProducts { get; set; }
+
+    public DbSet<Employee> Employees { get; set; }
+    public DbSet<Supplies> Supplieses { get; set; }
+    public DbSet<Storage> Agencies { get; set; }
+    public DbSet<ProductSupplies> ProductSupplieses { get; set; }
+    public DbSet<ProductStorage> ProductAgensies { get; set; }
+}
--- a/CandyHouseSolution/CandyHouseDatabase/Implementations/ClientStorageContarct.cs
+++ b/CandyHouseSolution/CandyHouseDatabase/Implementations/ClientStorageContarct.cs
@@ -0,0 +1,144 @@
+using AutoMapper;
+using CandyHouseContracts.DataModels;
+using CandyHouseContracts.Exceptions;
+using CandyHouseContracts.StoragesContracts;
+using CandyHouseDatabase.Models;
+using Microsoft.EntityFrameworkCore;
+using Npgsql;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseDatabase.Implementations;
+
+internal class ClientStorageContarct : IClientStorageContract
+{
+    private readonly CandyHouseDbContext _dbContext;
+    private readonly Mapper _mapper;
+    public ClientStorageContarct(CandyHouseDbContext magicCarpetDbContext)
+    {
+        _dbContext = magicCarpetDbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.AddMaps(typeof(CandyHouseDbContext).Assembly);
+        });
+        _mapper = new Mapper(config);
+    }
+    public List<ClientDataModel> GetList()
+    {
+        try
+        {
+            return [.. _dbContext.Clients.Select(x => _mapper.Map<ClientDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public ClientDataModel? GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<ClientDataModel>(GetClientById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public ClientDataModel? GetElementByFIO(string fio)
+    {
+        try
+        {
+            return _mapper.Map<ClientDataModel>(_dbContext.Clients.FirstOrDefault(x => x.FIO == fio));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public ClientDataModel? GetElementByPhoneNumber(string phoneNumber)
+    {
+        try
+        {
+            return _mapper.Map<ClientDataModel>(_dbContext.Clients.FirstOrDefault(x => x.PhoneNumber == phoneNumber));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public void AddElement(ClientDataModel clientDataModel)
+    {
+        try
+        {
+            _dbContext.Clients.Add(_mapper.Map<Client>(clientDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (InvalidOperationException ex) when (ex.TargetSite?.Name == "ThrowIdentityConflict")
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("Id", clientDataModel.Id);
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Clients_PhoneNumber" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("PhoneNumber", clientDataModel.PhoneNumber);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public void UpdElement(ClientDataModel clientDataModel)
+    {
+        try
+        {
+            var element = GetClientById(clientDataModel.Id) ?? throw new ElementNotFoundException(clientDataModel.Id);
+            _dbContext.Clients.Update(_mapper.Map(clientDataModel, element));
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Clients_PhoneNumber" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("PhoneNumber", clientDataModel.PhoneNumber);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public void DelElement(string id)
+    {
+        try
+        {
+            var element = GetClientById(id) ?? throw new ElementNotFoundException(id);
+            _dbContext.Clients.Remove(element);
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    private Client? GetClientById(string id) => _dbContext.Clients.FirstOrDefault(x => x.Id == id);
+}
--- a/CandyHouseSolution/CandyHouseDatabase/Implementations/EmployeeStorageContract.cs
+++ b/CandyHouseSolution/CandyHouseDatabase/Implementations/EmployeeStorageContract.cs
@@ -0,0 +1,156 @@
+using AutoMapper;
+using CandyHouseContracts.DataModels;
+using CandyHouseContracts.Exceptions;
+using CandyHouseContracts.StoragesContracts;
+using CandyHouseDatabase.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseDatabase.Implementations;
+
+internal class EmployeeStorageContract : IEmployeeStorageContract
+{
+    private readonly CandyHouseDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public EmployeeStorageContract(CandyHouseDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.AddMaps(typeof(CandyHouseDbContext).Assembly);
+        });
+        _mapper = new Mapper(config);
+    }
+    public List<EmployeeDataModel> GetList(bool onlyActive = true, string? postId = null, DateTime? fromBirthDate = null, DateTime? toBirthDate = null, DateTime? fromEmploymentDate = null, DateTime? toEmploymentDate = null)
+    {
+        try
+        {
+            var query = _dbContext.Employees.AsQueryable();
+            if (onlyActive)
+            {
+                query = query.Where(x => !x.IsDeleted);
+            }
+            if (postId is not null)
+            {
+                query = query.Where(x => x.PostId == postId);
+            }
+            if (fromBirthDate is not null && toBirthDate is not null)
+            {
+                query = query.Where(x => x.BirthDate >= fromBirthDate && x.BirthDate <= toBirthDate);
+            }
+            if (fromEmploymentDate is not null && toEmploymentDate is not null)
+            {
+                query = query.Where(x => x.EmploymentDate >= fromEmploymentDate && x.EmploymentDate <= toEmploymentDate);
+            }
+            return [.. query.Select(x => _mapper.Map<EmployeeDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public EmployeeDataModel? GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<EmployeeDataModel>(GetEmployeeById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public EmployeeDataModel? GetElementByFIO(string fio)
+    {
+        try
+        {
+            return _mapper.Map<EmployeeDataModel>(_dbContext.Employees.FirstOrDefault(x => x.FIO == fio));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public EmployeeDataModel? GetElementByEmail(string email)
+    {
+        try
+        {
+            return _mapper.Map<EmployeeDataModel>(_dbContext.Employees.FirstOrDefault(x => x.Email == email));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(EmployeeDataModel employeeDataModel)
+    {
+        try
+        {
+            _dbContext.Employees.Add(_mapper.Map<Employee>(employeeDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (InvalidOperationException ex) when (ex.TargetSite?.Name == "ThrowIdentityConflict")
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("Id", employeeDataModel.Id);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void UpdElement(EmployeeDataModel employeeDataModel)
+    {
+        try
+        {
+            var element = GetEmployeeById(employeeDataModel.Id) ?? throw new ElementNotFoundException(employeeDataModel.Id);
+            _dbContext.Employees.Update(_mapper.Map(employeeDataModel, element));
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void DelElement(string id)
+    {
+        try
+        {
+            var element = GetEmployeeById(id) ?? throw new ElementNotFoundException(id);
+            element.IsDeleted = true;
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    private Employee? GetEmployeeById(string id) => _dbContext.Employees.FirstOrDefault(x => x.Id == id && !x.IsDeleted);   
+}
--- a/CandyHouseSolution/CandyHouseDatabase/Implementations/PostStorageContract.cs
+++ b/CandyHouseSolution/CandyHouseDatabase/Implementations/PostStorageContract.cs
@@ -0,0 +1,196 @@
+using AutoMapper;
+using CandyHouseContracts.DataModels;
+using CandyHouseContracts.Exceptions;
+using CandyHouseContracts.StoragesContracts;
+using CandyHouseDatabase.Models;
+using Microsoft.EntityFrameworkCore;
+using Npgsql;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseDatabase.Implementations;
+
+internal class PostStorageContract : IPostStorageContract
+{
+    private readonly CandyHouseDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public PostStorageContract(CandyHouseDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<Post, PostDataModel>()
+                .ForMember(x => x.Id, x => x.MapFrom(src => src.PostId));
+            cfg.CreateMap<PostDataModel, Post>()
+                .ForMember(x => x.Id, x => x.Ignore())
+                .ForMember(x => x.PostId, x => x.MapFrom(src => src.Id))
+                .ForMember(x => x.IsActual, x => x.MapFrom(src => true))
+                .ForMember(x => x.ChangeDate, x => x.MapFrom(src => DateTime.UtcNow));
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<PostDataModel> GetList(bool onlyActual = true)
+    {
+        try
+        {
+            var query = _dbContext.Posts.AsQueryable();
+            if (onlyActual)
+            {
+                query = query.Where(x => x.IsActual);
+            }
+            return [.. query.Select(x => _mapper.Map<PostDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public List<PostDataModel> GetPostWithHistory(string postId)
+    {
+        try
+        {
+            return [.. _dbContext.Posts.Where(x => x.PostId == postId).Select(x => _mapper.Map<PostDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public PostDataModel? GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<PostDataModel>(_dbContext.Posts.FirstOrDefault(x => x.PostId == id && x.IsActual));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public PostDataModel? GetElementByName(string name)
+    {
+        try
+        {
+            return _mapper.Map<PostDataModel>(_dbContext.Posts.FirstOrDefault(x => x.PostName == name && x.IsActual));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(PostDataModel postDataModel)
+    {
+        try
+        {
+            _dbContext.Posts.Add(_mapper.Map<Post>(postDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Posts_PostName_IsActual" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("PostName", postDataModel.PostName);
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Posts_PostId_IsActual" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("PostId", postDataModel.Id);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void UpdElement(PostDataModel postDataModel)
+    {
+        try
+        {
+            var transaction = _dbContext.Database.BeginTransaction();
+            try
+            {
+                var element = GetPostById(postDataModel.Id) ?? throw new ElementNotFoundException(postDataModel.Id);
+                if (!element.IsActual)
+                {
+                    throw new ElementDeletedException(postDataModel.Id);
+                }
+                element.IsActual = false;
+                _dbContext.SaveChanges();
+                var newElement = _mapper.Map<Post>(postDataModel);
+                _dbContext.Posts.Add(newElement);
+                _dbContext.SaveChanges();
+                transaction.Commit();
+            }
+            catch
+            {
+                transaction.Rollback();
+                throw;
+            }
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Posts_PostName_IsActual" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("PostName", postDataModel.PostName);
+        }
+        catch (Exception ex) when (ex is ElementDeletedException || ex is ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void DelElement(string id)
+    {
+        try
+        {
+            var element = GetPostById(id) ?? throw new ElementNotFoundException(id);
+            if (!element.IsActual)
+            {
+                throw new ElementDeletedException(id);
+            }
+            element.IsActual = false;
+            _dbContext.SaveChanges();
+        }
+        catch
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+    }
+
+    public void ResElement(string id)
+    {
+        try
+        {
+            var element = GetPostById(id) ?? throw new ElementNotFoundException(id);
+            element.IsActual = true;
+            _dbContext.SaveChanges();
+        }
+        catch
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+    }
+
+    private Post? GetPostById(string id) => _dbContext.Posts.Where(x => x.PostId == id)
+        .OrderByDescending(x => x.ChangeDate).FirstOrDefault();
+}
--- a/CandyHouseSolution/CandyHouseDatabase/Implementations/ProductStorageContract.cs
+++ b/CandyHouseSolution/CandyHouseDatabase/Implementations/ProductStorageContract.cs
@@ -0,0 +1,169 @@
+using AutoMapper;
+using CandyHouseContracts.DataModels;
+using CandyHouseContracts.Exceptions;
+using CandyHouseContracts.StoragesContracts;
+using CandyHouseDatabase.Models;
+using Microsoft.EntityFrameworkCore;
+using Npgsql;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseDatabase.Implementations;
+
+internal class ProductStorageContract : IProductStorageContract
+{
+    private readonly CandyHouseDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public ProductStorageContract(CandyHouseDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<Product, ProductDataModel>();
+            cfg.CreateMap<ProductDataModel, Product>();
+            cfg.CreateMap<ProductHistory, ProductHistoryDataModel>(); ;
+        });
+        _mapper = new Mapper(config);
+    }
+    public List<ProductDataModel> GetList()
+    {
+        try
+        {
+            return [.. _dbContext.Products.Select(x => _mapper.Map<ProductDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public List<ProductHistoryDataModel> GetHistoryByProductId(string productId)
+    {
+        try
+        {
+            return [.. _dbContext.ProductHistories.Where(x => x.ProductId == productId).OrderByDescending(x => x.ChangeDate).Select(x => _mapper.Map<ProductHistoryDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public ProductDataModel? GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<ProductDataModel>(GetProductById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public ProductDataModel? GetElementByName(string name)
+    {
+        try
+        {
+            return _mapper.Map<ProductDataModel>(_dbContext.Products.FirstOrDefault(x => x.ProductName == name));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(ProductDataModel productDataModel)
+    {
+        try
+        {
+            _dbContext.Products.Add(_mapper.Map<Product>(productDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (InvalidOperationException ex) when (ex.TargetSite?.Name == "ThrowIdentityConflict")
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("Id", productDataModel.Id);
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Products_ProductName" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("ProductName", productDataModel.ProductName);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void UpdElement(ProductDataModel productDataModel)
+    {
+        try
+        {
+            var element = GetProductById(productDataModel.Id) ?? throw new ElementNotFoundException(productDataModel.Id);
+            _dbContext.Products.Update(_mapper.Map(productDataModel, element));
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Products_ProductName" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("ProductName", productDataModel.ProductName);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void DelElement(string id)
+    {
+        try
+        {
+            var element = GetProductById(id) ?? throw new ElementNotFoundException(id);
+            _dbContext.Products.Remove(element);
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void ResElement(string id)
+    {
+        try
+        {
+            var element = GetProductById(id) ?? throw new ElementNotFoundException(id);
+            _dbContext.SaveChanges();
+        }
+        catch
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+    }
+
+    private Product? GetProductById(string id) => _dbContext.Products.FirstOrDefault(x => x.Id == id);
+}
--- a/CandyHouseSolution/CandyHouseDatabase/Implementations/SalaryStorageContract.cs
+++ b/CandyHouseSolution/CandyHouseDatabase/Implementations/SalaryStorageContract.cs
@@ -0,0 +1,62 @@
+using AutoMapper;
+using CandyHouseContracts.DataModels;
+using CandyHouseContracts.Exceptions;
+using CandyHouseContracts.StoragesContracts;
+using CandyHouseDatabase.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseDatabase.Implementations;
+
+internal class SalaryStorageContract : ISalaryStorageContract
+{
+    private readonly CandyHouseDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public SalaryStorageContract(CandyHouseDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<Salary, SalaryDataModel>();
+            cfg.CreateMap<SalaryDataModel, Salary>()
+                .ForMember(dest => dest.EmployeeSalary, opt => opt.MapFrom(src => src.Salary));
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<SalaryDataModel> GetList(DateTime startDate, DateTime endDate, string? employeeId = null)
+    {
+        try
+        {
+            var query = _dbContext.Salaries.Where(x => x.SalaryDate >= startDate && x.SalaryDate <= endDate);
+            if (employeeId is not null)
+            {
+                query = query.Where(x => x.EmployeeId == employeeId);
+            }
+            return [.. query.Select(x => _mapper.Map<SalaryDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(SalaryDataModel salaryDataModel)
+    {
+        try
+        {
+            _dbContext.Salaries.Add(_mapper.Map<Salary>(salaryDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+}
--- a/CandyHouseSolution/CandyHouseDatabase/Implementations/SaleStorageContract.cs
+++ b/CandyHouseSolution/CandyHouseDatabase/Implementations/SaleStorageContract.cs
@@ -0,0 +1,117 @@
+using AutoMapper;
+using CandyHouseContracts.DataModels;
+using CandyHouseContracts.Exceptions;
+using CandyHouseContracts.StoragesContracts;
+using CandyHouseDatabase.Models;
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseDatabase.Implementations;
+
+internal class SaleStorageContract : ISaleStorageContract
+{
+    private readonly CandyHouseDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public SaleStorageContract(CandyHouseDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<SaleProduct, SaleProductDataModel>();
+            cfg.CreateMap<SaleProductDataModel, SaleProduct>();
+            cfg.CreateMap<Sale, SaleDataModel>();
+            cfg.CreateMap<SaleDataModel, Sale>()
+                .ForMember(x => x.IsCancel, x => x.MapFrom(src => false))
+                .ForMember(x => x.SaleProducts, x => x.MapFrom(src => src.Products));
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<SaleDataModel> GetList(DateTime? startDate = null, DateTime? endDate = null, string? employeeId = null, string? clientId = null, string? productId = null)
+    {
+        try
+        {
+            var query = _dbContext.Sales.Include(x => x.SaleProducts).AsQueryable();
+            if (startDate is not null && endDate is not null)
+            {
+                query = query.Where(x => x.SaleDate >= startDate && x.SaleDate < endDate);
+            }
+            if (employeeId is not null)
+            {
+                query = query.Where(x => x.EmployeeId == employeeId);
+            }
+            if (clientId is not null)
+            {
+                query = query.Where(x => x.ClientId == clientId);
+            }
+            if (productId is not null)
+            {
+                query = query.Where(x => x.SaleProducts!.Any(y => y.ProductId == productId));
+            }
+            return [.. query.Select(x => _mapper.Map<SaleDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public SaleDataModel? GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<SaleDataModel>(GetSaleById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(SaleDataModel saleDataModel)
+    {
+        try
+        {
+            _dbContext.Sales.Add(_mapper.Map<Sale>(saleDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void DelElement(string id)
+    {
+        try
+        {
+            var element = GetSaleById(id) ?? throw new ElementNotFoundException(id);
+            if (element.IsCancel)
+            {
+                throw new ElementDeletedException(id);
+            }
+            element.IsCancel = true;
+            _dbContext.SaveChanges();
+        }
+        catch (Exception ex) when (ex is ElementDeletedException || ex is ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    private Sale? GetSaleById(string id) => _dbContext.Sales.FirstOrDefault(x => x.Id == id);
+}
--- a/CandyHouseSolution/CandyHouseDatabase/Implementations/StorageStorageContract.cs
+++ b/CandyHouseSolution/CandyHouseDatabase/Implementations/StorageStorageContract.cs
@@ -0,0 +1,148 @@
+using AutoMapper;
+using CandyHouseContracts.DataModels;
+using CandyHouseContracts.Exceptions;
+using CandyHouseContracts.StoragesContracts;
+using CandyHouseDatabase.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CandyHouseDatabase.Implementations;
+
+public class StorageStorageContract : IStorageStorageContract
+{
+    private readonly CandyHouseDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public StorageStorageContract(CandyHouseDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<Storage, StorageDataModel>()
+       .ConstructUsing(src => new StorageDataModel(
+           src.Id,
+           src.Type,
+           src.Count,
+           _mapper.Map<List<ProductStorageDataModel>>(src.Products)
+       ));
+
+            cfg.CreateMap<StorageDataModel, Storage>();
+            cfg.CreateMap<ProductStorageDataModel, ProductStorage>().ReverseMap();
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<StorageDataModel> GetList()
+    {
+        try
+        {
+            return [.. _dbContext.Agencies.Select(x => _mapper.Map<StorageDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public StorageDataModel GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<StorageDataModel>(GetStorageById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(StorageDataModel storageDataModel)
+    {
+        try
+        {
+            _dbContext.Agencies.Add(_mapper.Map<Storage>(storageDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void UpdElement(StorageDataModel storageDataModel)
+    {
+        try
+        {
+            var element = GetStorageById(storageDataModel.Id) ?? throw new ElementNotFoundException(storageDataModel.Id);
+            _dbContext.Agencies.Update(_mapper.Map(storageDataModel, element));
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void DelElement(string id)
+    {
+        try
+        {
+            var element = GetStorageById(id) ?? throw new ElementNotFoundException(id);
+            _dbContext.Agencies.Remove(element);
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public bool CheckComponents(SaleDataModel saleDataModel)
+    {
+        using (var transaction = _dbContext.Database.BeginTransaction())
+        {
+            foreach (SaleProductDataModel sale_product in saleDataModel.Products)
+            {
+                var product = _dbContext.Products.FirstOrDefault(x => x.Id == sale_product.ProductId);
+                var storage = _dbContext.Agencies.FirstOrDefault(x => x.Type == product.ProductType && x.Count >= sale_product.Count);
+
+                if (storage == null)
+                {
+                    transaction.Rollback();
+                    return false;
+                }
+                if (storage.Count - sale_product.Count == 0)
+                {
+                    DelElement(storage.Id);
+                }
+                else
+                {
+                    storage.Count -= sale_product.Count;
+                }
+            }
+            transaction.Commit();
+            _dbContext.SaveChanges();
+            return true;
+        }
+    }
+
+    private Storage? GetStorageById(string id) => _dbContext.Agencies.FirstOrDefault(x => x.Id == id);
+}
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
LivelyPuer	3501f2a724	test fix	2025-04-15 15:51:05 +04:00
LivelyPuer	86881f7317	lab3-ready	2025-04-15 02:40:51 +04:00
LivelyPuer	d51c616862	fix	2025-04-15 01:47:02 +04:00
LivelyPuer	4518d36016	lab2-ready	2025-04-15 01:25:50 +04:00
LivelyPuer	e0f0af6754	Add mock operations	2025-03-26 21:51:51 +04:00
LivelyPuer	dbde99c7eb	Wip beda	2025-03-13 15:40:49 +04:00
LivelyPuer	fa6b1b64a2	lab2 hard ready	2025-03-11 21:44:01 +04:00
LivelyPuer	bdb510f098	lab-2 merged to lab2-hard	2025-03-11 21:18:14 +04:00
LivelyPuer	75c5ceabc0	red-line	2025-03-11 21:11:14 +04:00
LivelyPuer	514f2adefb	lab1-hard merged to lab2-hard-no-logic	2025-03-11 20:45:10 +04:00
LivelyPuer	6ad09c5ff2	Merge branch 'refs/heads/lab-1-hard' into lab-2-hard-no-logic # Conflicts: # CandyHouseSolution/CandyHouseBase/DataModels/StorageDataModel.cs	2025-03-11 20:37:07 +04:00
LivelyPuer	807ac64a9f	fix	2025-03-11 20:36:00 +04:00
LivelyPuer	ffaeb985e5	Revert "lab1-hard" This reverts commit `b4819145`	2025-03-11 20:27:46 +04:00
LivelyPuer	7b71b14c71	Merge branch 'refs/heads/lab-1-hard' into lab-2-hard-no-logic # Conflicts: # CandyHouseSolution/CandyHouseBase/CandyHouseBase.csproj	2025-03-11 20:26:20 +04:00
LivelyPuer	b481914563	lab1-hard	2025-02-27 12:01:44 +04:00