Fixes.

Contractor: DataModels.

ComputerStore/ComputerStore.sln

@@ -3,7 +3,17 @@ Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 17
 VisualStudioVersion = 17.5.33516.290
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ComputerStore", "ComputerStore.csproj", "{695B79EB-71FD-456D-BFEA-634500FF2ECB}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ComputerStoreBusinessLogic", "..\ComputerStoreBusinessLogic\ComputerStoreBusinessLogic.csproj", "{17F8960F-03CB-49D7-B335-931E6BE5F9FF}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ComputerStoreContracts", "..\ComputerStoreContracts\ComputerStoreContracts.csproj", "{1C8DB816-F530-4CC3-9F36-F6191FE49C10}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ComputerStoreDataModels", "..\ComputerStoreDataModels\ComputerStoreDataModels.csproj", "{93679794-7F9A-43C4-A7C3-A1AE77FAB964}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ComputerStoreDatabaseImplement", "..\ComputerStoreDatabaseImplement\ComputerStoreDatabaseImplement.csproj", "{24D66D03-F9DA-46C0-8C52-F55DDACDE8AF}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ComputerStoreRestAPI", "..\ComputerStoreRestAPI\ComputerStoreRestAPI.csproj", "{11E7B5B7-7AF5-4E1E-837F-E6645D3C0EFB}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ComputerStoreEmployeeApp", "..\ComputerStoreEmployeeApp\ComputerStoreEmployeeApp.csproj", "{E1091CF6-5350-402F-A305-2973C96D2AC5}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -11,10 +21,30 @@ Global
 		Release|Any CPU = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{695B79EB-71FD-456D-BFEA-634500FF2ECB}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{695B79EB-71FD-456D-BFEA-634500FF2ECB}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{695B79EB-71FD-456D-BFEA-634500FF2ECB}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{695B79EB-71FD-456D-BFEA-634500FF2ECB}.Release|Any CPU.Build.0 = Release|Any CPU
+		{17F8960F-03CB-49D7-B335-931E6BE5F9FF}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{17F8960F-03CB-49D7-B335-931E6BE5F9FF}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{17F8960F-03CB-49D7-B335-931E6BE5F9FF}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{17F8960F-03CB-49D7-B335-931E6BE5F9FF}.Release|Any CPU.Build.0 = Release|Any CPU
+		{1C8DB816-F530-4CC3-9F36-F6191FE49C10}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{1C8DB816-F530-4CC3-9F36-F6191FE49C10}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{1C8DB816-F530-4CC3-9F36-F6191FE49C10}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{1C8DB816-F530-4CC3-9F36-F6191FE49C10}.Release|Any CPU.Build.0 = Release|Any CPU
+		{93679794-7F9A-43C4-A7C3-A1AE77FAB964}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{93679794-7F9A-43C4-A7C3-A1AE77FAB964}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{93679794-7F9A-43C4-A7C3-A1AE77FAB964}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{93679794-7F9A-43C4-A7C3-A1AE77FAB964}.Release|Any CPU.Build.0 = Release|Any CPU
+		{24D66D03-F9DA-46C0-8C52-F55DDACDE8AF}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{24D66D03-F9DA-46C0-8C52-F55DDACDE8AF}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{24D66D03-F9DA-46C0-8C52-F55DDACDE8AF}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{24D66D03-F9DA-46C0-8C52-F55DDACDE8AF}.Release|Any CPU.Build.0 = Release|Any CPU
+		{11E7B5B7-7AF5-4E1E-837F-E6645D3C0EFB}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{11E7B5B7-7AF5-4E1E-837F-E6645D3C0EFB}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{11E7B5B7-7AF5-4E1E-837F-E6645D3C0EFB}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{11E7B5B7-7AF5-4E1E-837F-E6645D3C0EFB}.Release|Any CPU.Build.0 = Release|Any CPU
+		{E1091CF6-5350-402F-A305-2973C96D2AC5}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{E1091CF6-5350-402F-A305-2973C96D2AC5}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{E1091CF6-5350-402F-A305-2973C96D2AC5}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{E1091CF6-5350-402F-A305-2973C96D2AC5}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

ComputerStore/ComputerStoreEmployeeApp1.csproj

@@ -0,0 +1,20 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="7.0.4">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\ComputerStoreDatabaseImplement\ComputerStoreDatabaseImplement.csproj" />
+  </ItemGroup>
+
+</Project>

ComputerStore/Pages/ComponentMenu.cshtml

@@ -0,0 +1,4 @@
+@page
+@model ComputerStoreEmployeeApp.Pages.ComponentMenuModel
+@{
+}

ComputerStore/Pages/ComponentMenu.cshtml.cs

@@ -0,0 +1,12 @@
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.RazorPages;
+
+namespace ComputerStoreEmployeeApp.Pages
+{
+    public class ComponentMenuModel : PageModel
+    {
+        public void OnGet()
+        {
+        }
+    }
+}

ComputerStore/Pages/Index.cshtml

@@ -5,6 +5,6 @@
 }
 
 <div class="text-center">
-    <h1 class="display-4">Welcome</h1>
-    <p>Learn about <a href="https://docs.microsoft.com/aspnet/core">building Web apps with ASP.NET Core</a>.</p>
+    <h1 class="display-4">ComputerStore"Ты же программист"</h1>
+    <p>This app was created for employees.</p>
 </div>

ComputerStore/Pages/Shared/_Layout.cshtml

@@ -3,33 +3,52 @@
 <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <title>@ViewData["Title"] - ComputerStore</title>
+    <title>@ViewData["Title"] - EmployeeApp</title>
     <link rel="stylesheet" href="~/lib/bootstrap/dist/css/bootstrap.min.css" />
     <link rel="stylesheet" href="~/css/site.css" asp-append-version="true" />
     <link rel="stylesheet" href="~/ComputerStore.styles.css" asp-append-version="true" />
 </head>
 <body>
-    <header>
-        <nav class="navbar navbar-expand-sm navbar-toggleable-sm navbar-light bg-white border-bottom box-shadow mb-3">
-            <div class="container">
-                <a class="navbar-brand" asp-area="" asp-page="/Index">ComputerStore</a>
-                <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target=".navbar-collapse" aria-controls="navbarSupportedContent"
-                        aria-expanded="false" aria-label="Toggle navigation">
-                    <span class="navbar-toggler-icon"></span>
-                </button>
-                <div class="navbar-collapse collapse d-sm-inline-flex justify-content-between">
-                    <ul class="navbar-nav flex-grow-1">
-                        <li class="nav-item">
-                            <a class="nav-link text-dark" asp-area="" asp-page="/Index">Home</a>
-                        </li>
-                        <li class="nav-item">
-                            <a class="nav-link text-dark" asp-area="" asp-page="/Privacy">Privacy</a>
-                        </li>
-                    </ul>
+    @if(ViewBag.ShowTopBar == false)
+    {
+        
+    }
+    else
+    {
+        <header>
+            <nav class="navbar navbar-expand-sm navbar-toggleable-sm navbar-light bg-white border-bottom box-shadow mb-3">
+                <div class="container">
+                    <a class="navbar-brand" asp-area="" asp-page="/Index">EmployeeApp</a>
+                    <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target=".navbar-collapse" aria-controls="navbarSupportedContent"
+                            aria-expanded="false" aria-label="Toggle navigation">
+                        <span class="navbar-toggler-icon"></span>
+                    </button>
+                    <div class="navbar-collapse collapse d-sm-inline-flex justify-content-between">
+                        <ul class="navbar-nav flex-grow-1">
+                            <li class="nav-item">
+                                <a class="nav-link text-dark" asp-area="" asp-page="/Index">Menu</a>
+                            </li>
+                            <li class="nav-item">
+                                <a class="nav-link text-dark" asp-area="" asp-page="/ComponentMenu">Components</a>
+                            </li>
+                            <li class="nav-item">
+                                <a class="nav-link text-dark" asp-area="" asp-page="/ProductMenu">Products</a>
+                            </li>
+                            <li class="nav-item">
+                                <a class="nav-link text-dark" asp-area="" asp-page="/PCsMenu">PCs</a>
+                            </li>
+                            <li class="nav-item">
+                                <a class="nav-link text-dark" asp-area="" asp-page="/Request">Requests</a>
+                            </li>
+                            <li class="nav-item">
+                                <a class="nav-link text-dark" asp-area="" asp-page="/Report">Reports</a>
+                            </li>
+                        </ul>
+                    </div>
                 </div>
-            </div>
-        </nav>
-    </header>
+            </nav>
+        </header>
+    }   
     <div class="container">
         <main role="main" class="pb-3">
             @RenderBody()
@@ -38,7 +57,7 @@
 
     <footer class="border-top footer text-muted">
         <div class="container">
-            &copy; 2023 - ComputerStore - <a asp-area="" asp-page="/Privacy">Privacy</a>
+            &copy; 2023 - ComputerStore - Privacy
         </div>
     </footer>
 

ComputerStoreBusinessLogic/BusinessLogic/ComponentLogic.cs

@@ -0,0 +1,116 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreContracts.BusinessLogicContracts;
+using ComputerStoreContracts.SearchModels;
+using ComputerStoreContracts.StorageContracts;
+using ComputerStoreContracts.ViewModels;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Data;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreBusinessLogic.BusinessLogic
+{
+    public class ComponentLogic : IComponentLogic
+    {
+        private readonly ILogger _logger;
+        private readonly IComponentStorage _componentStorage;
+        public ComponentLogic(ILogger<ComponentLogic> logger, IComponentStorage componentStorage)
+        {
+            _logger = logger;
+            _componentStorage = componentStorage;
+        }
+
+        public bool Create(ComponentBindingModel model)
+        {
+            CheckModel(model);
+            if(_componentStorage.Insert(model) == null)
+            {
+                _logger.LogWarning("Insert operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public bool Update(ComponentBindingModel model)
+        {
+            CheckModel(model);
+            if (_componentStorage.Update(model) == null)
+            {
+                _logger.LogWarning("Update operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public bool Delete(ComponentBindingModel model)
+        {
+            CheckModel(model,false);
+            _logger.LogInformation("Delete. ID:{ID}", model.ID);
+            if (_componentStorage.Delete(model) == null)
+            {
+                _logger.LogWarning("Delete operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public ComponentViewModel? ReadElement(ComponentSearchModel model)
+        {
+            if(model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+
+            _logger.LogInformation("ReadElement. ComponentName:{ComponentName}.ID:{ ID}", model.Name, model.ID);
+
+            var element = _componentStorage.GetElement(model);
+
+            if (element == null)
+            {
+                _logger.LogWarning("ReadElement element not found");
+                return null;
+            }
+
+            _logger.LogInformation("ReadElement find. ID:{ID}", element.ID);
+            return element;
+        }
+
+        public List<ComponentViewModel>? ReadList(ComponentSearchModel? model)
+        {
+            _logger.LogInformation("ReadList. ComponentName:{ComponentName}. ID:{ ID}", model?.Name, model?.ID);
+
+            var list = model == null ? _componentStorage.GetFullList() : _componentStorage.GetFilteredList(model);
+
+            if (list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return null;
+            }
+            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
+            return list;
+        }
+
+        private void CheckModel(ComponentBindingModel model, bool withParams = true)
+        {
+            if (model == null) { return; }
+            if (!withParams) { return; }
+            if(string.IsNullOrEmpty(model.Name)) { throw new ArgumentNullException("Invalid component's name", nameof(model)); }
+            if(model.Price <= 0) { throw new ArgumentNullException("Invalid component's price", nameof(model)); }
+
+            _logger.LogInformation("Component. ComponentName:{ComponentName}. Cost:{ Cost}. ID: { ID} ", model.Name, model.Price, model.ID);
+
+            var element = _componentStorage.GetElement(new ComponentSearchModel
+            {
+                Name = model.Name
+            });
+
+            if (element != null && element.ID != model.ID)
+            {
+                throw new InvalidOperationException("Component with such name already exists.");
+            }
+        }
+    }
+}

ComputerStoreBusinessLogic/BusinessLogic/ConsignmentLogic.cs

@@ -0,0 +1,104 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreContracts.BusinessLogicContracts;
+using ComputerStoreContracts.SearchModels;
+using ComputerStoreContracts.StorageContracts;
+using ComputerStoreContracts.ViewModels;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreBusinessLogic.BusinessLogic
+{
+    public class ConsignmentLogic : IConsignmentLogic
+    {
+        private readonly ILogger _logger;
+        private readonly IConsignmentStorage _consignmentStorage;
+        public ConsignmentLogic(ILogger<ConsignmentLogic> logger, IConsignmentStorage consignmentStorage)
+        {
+            _logger = logger;
+            _consignmentStorage = consignmentStorage;
+        }
+
+        public bool Create(ConsignmentBindingModel model)
+        {
+            CheckModel(model);
+            if (_consignmentStorage.Insert(model) == null)
+            {
+                _logger.LogWarning("Insert operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public bool Update(ConsignmentBindingModel model)
+        {
+            CheckModel(model);
+            if (_consignmentStorage.Update(model) == null)
+            {
+                _logger.LogWarning("Update operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public bool Delete(ConsignmentBindingModel model)
+        {
+            CheckModel(model, false);
+            _logger.LogInformation("Delete. ID:{ID}", model.ID);
+            if (_consignmentStorage.Delete(model) == null)
+            {
+                _logger.LogWarning("Delete operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public ConsignmentViewModel? ReadElement(ConsignmentSearchModel model)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+
+            _logger.LogInformation("ReadElement. Consignment ID:{ ID}", model.ID);
+
+            var element = _consignmentStorage.GetElement(model);
+
+            if (element == null)
+            {
+                _logger.LogWarning("ReadElement element not found");
+                return null;
+            }
+
+            _logger.LogInformation("ReadElement find. Consignment ID:{ID}", element.ID);
+            return element;
+        }
+
+        public List<ConsignmentViewModel>? ReadList(ConsignmentSearchModel? model)
+        {
+            _logger.LogInformation("ReadList. Consignment ID:{ ID}", model?.ID);
+
+            var list = model == null ? _consignmentStorage.GetFullList() : _consignmentStorage.GetFilteredList(model);
+
+            if (list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return null;
+            }
+            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
+            return list;
+        }
+
+        private void CheckModel(ConsignmentBindingModel model, bool withParams = true)
+        {
+            if (model == null) { return; }
+            if (!withParams) { return; }
+            if (model.Price <= 0) { throw new ArgumentNullException("Invalid consignment's price", nameof(model)); }
+
+            _logger.LogInformation("Consignment. Consignment ID:{ ID}. Order ID:{ OrderID}.", model.ID, model.OrderID);
+        }
+    }
+}

ComputerStoreBusinessLogic/BusinessLogic/EmployeeLogic.cs

@@ -0,0 +1,122 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreContracts.BusinessLogicContracts;
+using ComputerStoreContracts.SearchModels;
+using ComputerStoreContracts.StorageContracts;
+using ComputerStoreContracts.ViewModels;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreBusinessLogic.BusinessLogic
+{
+    public class EmployeeLogic : IEmployeeLogic
+    {
+        private readonly ILogger _logger;
+        private readonly IEmployeeStorage _employeeStorage;
+        public EmployeeLogic(ILogger<EmployeeLogic> logger, IEmployeeStorage employeeStorage)
+        {
+            _logger = logger;
+            _employeeStorage = employeeStorage;
+        }
+        public bool Create(EmployeeBindingModel model)
+        {
+            CheckEmployee(model);
+            if (_employeeStorage.Insert(model) == null)
+            {
+                _logger.LogWarning("Insert operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public bool Update(EmployeeBindingModel model)
+        {
+            CheckEmployee(model);
+            if (_employeeStorage.Update(model) == null)
+            {
+                _logger.LogWarning("Update operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public bool Delete(EmployeeBindingModel model)
+        {
+            CheckEmployee(model, false);
+            _logger.LogInformation("Delete. ID:{ID}", model.ID);
+            if (_employeeStorage.Delete(model) == null)
+            {
+                _logger.LogWarning("Delete operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public EmployeeViewModel? ReadElement(EmployeeSearchModel model)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            _logger.LogInformation("ReadElement. Username:{Username}.ID:{ ID}", model.Username, model.ID);
+            var element = _employeeStorage.GetElement(model);
+            if (element == null)
+            {
+                _logger.LogWarning("ReadElement element not found");
+                return null;
+            }
+            _logger.LogInformation("ReadElement find. ID:{ID}", element.ID);
+            return element;
+        }
+
+        public List<EmployeeViewModel>? ReadList(EmployeeSearchModel? model)
+        {
+            _logger.LogInformation("ReadList. Username:{Username}. ID:{ ID}", model?.Username, model?.ID);
+
+            var list = model == null ? _employeeStorage.GetFullList() : _employeeStorage.GetFilteredList(model);
+
+            if (list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return null;
+            }
+            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
+            return list;
+        }
+
+        public void CheckEmployee(EmployeeBindingModel model, bool withParams = true)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            if (!withParams)
+            {
+                return;
+            }
+            if (string.IsNullOrEmpty(model.Username))
+            {
+                throw new ArgumentNullException("Invalid username of user", nameof(model.Username));
+            }
+            if (string.IsNullOrEmpty(model.Password))
+            {
+                throw new ArgumentNullException("Invalid password of user", nameof(model.Password));
+            }
+
+            _logger.LogInformation("Client. Username:{ Username}. ID: { ID} ", model.Username, model.ID);
+
+            var element = _employeeStorage.GetElement(new EmployeeSearchModel
+            {
+                Username = model.Username
+            });
+
+            if (element != null && element.ID != model.ID)
+            {
+                throw new InvalidOperationException("Employee with such username already exists.");
+            }
+        }
+    }
+}

ComputerStoreBusinessLogic/BusinessLogic/EmployeeReportLogic.cs

@@ -0,0 +1,169 @@
+using ComputerStoreBusinessLogic.OfficePackage;
+using ComputerStoreBusinessLogic.OfficePackage.HelperModels;
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreContracts.BusinessLogicContracts;
+using ComputerStoreContracts.SearchModels;
+using ComputerStoreContracts.StorageContracts;
+using ComputerStoreContracts.ViewModels;
+using ComputerStoreDataModels.Models;
+using MigraDoc.DocumentObjectModel.Fields;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Runtime.CompilerServices;
+using System.Security.Cryptography.X509Certificates;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreBusinessLogic.BusinessLogic
+{
+    public class EmployeeReportLogic : IEmployeeReportLogic
+    {       
+        private readonly IPCStorage _pcStorage;
+        private readonly IProductStorage _productStorage;
+        private readonly IConsignmentStorage _consignmentStorage;
+        private readonly AbstractSaveToExcel _saveToExcel;
+        private readonly AbstractSaveToPDF _saveToPDF;
+        private readonly AbstractSaveToWord _saveToWord;
+
+        public EmployeeReportLogic(IPCStorage pcStorage, IProductStorage productStorage, IConsignmentStorage consignmentStorage, AbstractSaveToPDF saveToPDF, AbstractSaveToWord saveToWord, AbstractSaveToExcel saveToExcel)
+        {
+            _pcStorage = pcStorage;
+            _productStorage = productStorage;
+            _consignmentStorage = consignmentStorage;
+            _saveToPDF = saveToPDF;
+            _saveToWord = saveToWord;
+            _saveToExcel = saveToExcel;
+        }
+
+        public List<ReportPCByDateViewModel> GetPCsByDate(ReportDateBindingModel model)
+        {
+            return _pcStorage.GetFilteredList(new PCSearchModel
+            {
+                DateFrom = model.DateFrom,
+                DateTo = model.DateTo
+            })
+            .Select(x => new ReportPCByDateViewModel
+            {
+                PCName = x.Name,
+                Price = x.Price,
+                Components = x.PCComponents.Values.Select(x => (x.Item1.Name, x.Item2)).ToList(),
+                EmployeeUsername = x.EmployeeUsername
+            }).ToList();
+
+        }
+
+        public List<ReportProductByDateViewModel> GetProductsByDate(ReportDateBindingModel model)
+        {
+            return _productStorage.GetFilteredList(new ProductSearchModel
+            {
+                DateFrom = model.DateFrom,
+                DateTo = model.DateTo
+            })
+            .Select(x => new ReportProductByDateViewModel
+            {
+                ProductName = x.Name,
+                EmployeeUsername = x.EmployeeUsername,
+                Price = x.Price,
+                Components = x.ProductComponents.Values.Select(x => (x.Item1.Name, x.Item2)).ToList()
+
+            }).ToList();
+        }
+
+        public List<ReportConsignmentsViewModel> GetConsignmentsByComponents(ReportComponentsBindingModel model)
+        {
+            var list = new List<ReportConsignmentsViewModel>();
+
+            Dictionary<int, IProductModel> specifiedProducts = new Dictionary<int, IProductModel>();
+            
+            foreach(var component in model.Components)
+            {
+                var products = _productStorage.GetFilteredList(new ProductSearchModel
+                {
+                    ComponentID = component.ID
+                });
+
+                foreach(var product in products)
+                {
+                    if(!specifiedProducts.ContainsKey(product.ID))
+                    {
+                        specifiedProducts.Add(product.ID, product);
+                    }
+                }
+            }
+
+            Dictionary<int, IConsignmentModel> specifiedConsignments = new Dictionary<int, IConsignmentModel>();
+
+            foreach (var product in specifiedProducts)
+            {
+                var consignments = _consignmentStorage.GetFilteredList(new ConsignmentSearchModel
+                {
+                    ProductID = product.Key
+                });
+
+                if(!specifiedConsignments.Any())
+                {
+                    foreach (var consignment in consignments)
+                    {
+                        specifiedConsignments.Add(consignment.ID, consignment);
+                    }
+                }
+
+                foreach(var consignment in consignments)
+                {
+                    if (!specifiedConsignments.ContainsKey(consignment.ID))
+                    {
+                        specifiedConsignments.Add(consignment.ID,consignment);
+                    }
+                }
+                
+            }
+
+            foreach(var consignment in specifiedConsignments)
+            {
+                var record = new ReportConsignmentsViewModel
+                {
+                    ID = consignment.Key,
+                    Products = consignment.Value.ConsignmentProducts.Values.Select(x => (x.Item1.Name,x.Item2)).ToList()
+                };
+                list.Add(record);
+            }
+
+            return list;
+        }
+
+       
+        public MemoryStream SavePCsAndProductsToPdfFile(ReportDateBindingModel model)
+        {
+            return _saveToPDF.CreateDoc(new PDFInfo
+            {
+                FileName = model.FileName,
+                Title = "Products 'n orders list",
+                DateFrom = model.DateFrom!.Value,
+                DateTo = model.DateTo!.Value,
+                Products = GetProductsByDate(model),
+                PCs = GetPCsByDate(model)
+            });
+        }
+
+        public MemoryStream SaveConsignmentsToExcelFile(ReportComponentsBindingModel model)
+        {
+            return _saveToExcel.CreateReport(new ExcelInfo
+            {
+                FileName = model.FileName,
+                Title = "Consignments list",
+                ConsignmentProducts = GetConsignmentsByComponents(model)
+            });
+        }
+
+        public MemoryStream SaveConsignmentsToWordFile(ReportComponentsBindingModel model)
+        {
+            return _saveToWord.CreateDoc(new WordInfo
+            {
+                FileName = model.FileName,
+                Title = "Consignments list",
+                Consignments = GetConsignmentsByComponents(model)
+            });
+        }
+    }
+}

ComputerStoreBusinessLogic/BusinessLogic/OrderLogic.cs

@@ -0,0 +1,180 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreContracts.BusinessLogicContracts;
+using ComputerStoreContracts.SearchModels;
+using ComputerStoreContracts.StorageContracts;
+using ComputerStoreContracts.ViewModels;
+using ComputerStoreDataModels.Enums;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreBusinessLogic.BusinessLogic
+{
+    public class OrderLogic : IOrderLogic
+    {
+        private readonly ILogger _logger;
+        private readonly IOrderStorage _orderStorage;
+
+        public OrderLogic(ILogger<OrderLogic> logger, IOrderStorage orderStorage)
+        {
+            _logger = logger;
+            _orderStorage = orderStorage;
+        }
+
+        public bool CreateOrder(OrderBindingModel model)
+        {
+            CheckModel(model);
+            if (model.Status != OrderStatus.Unknown)
+            {
+                _logger.LogWarning("Insert operation failed. Order status incorrect.");
+                return false;
+            }
+            model.Status = OrderStatus.Accepted;
+            if (_orderStorage.Insert(model) == null)
+            {
+                model.Status = OrderStatus.Unknown;
+                _logger.LogWarning("Insert operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public bool DeleteOrder (OrderBindingModel model)
+        {
+			CheckModel(model, false);
+			_logger.LogInformation("Delete. ID:{ID}", model.ID);
+			if (_orderStorage.Delete(model) == null)
+			{
+				_logger.LogWarning("Delete operation failed");
+				return false;
+			}
+			return true;
+		}
+
+        public bool UpdateOrder (OrderBindingModel model)
+        {
+            CheckModel(model);
+			if (_orderStorage.Update(model) == null)
+            {
+				_logger.LogWarning("Update operation failed");
+				return false;
+			}
+            return true;
+		}
+
+        public bool StatusUpdate(OrderBindingModel rawModel, OrderStatus newStatus)
+        {
+            var viewModel = _orderStorage.GetElement(new OrderSearchModel
+            {
+                ID = rawModel.ID
+            });
+
+            if (viewModel == null)
+            {
+                _logger.LogWarning("Order model not found");
+                return false;
+            }
+
+            OrderBindingModel model = new OrderBindingModel
+            {
+                ID = viewModel.ID,
+                Status = viewModel.Status,
+                DateCreate = viewModel.DateCreate,
+                DateImplement = viewModel.DateImplement,
+                Price = viewModel.Price,
+                SellerID = viewModel.SellerID,
+                OrderConsignments = viewModel.OrderConsignments,
+                OrderRequests = viewModel.OrderRequests
+            };
+
+            CheckModel(model, false);
+            if (model.Status + 1 != newStatus)
+            {
+                _logger.LogWarning("Status update to " + newStatus.ToString() + " operation failed. Order status incorrect.");
+                return false;
+            }
+            model.Status = newStatus;
+            if (model.Status == OrderStatus.Given) model.DateImplement = DateTime.Now;
+            if (_orderStorage.Update(model) == null)
+            {
+                model.Status--;
+                _logger.LogWarning("Update operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public bool TakeOrderInProcess(OrderBindingModel model)
+        {
+            return StatusUpdate(model, OrderStatus.InProcess);
+        }
+
+        public bool TakeOrderReady(OrderBindingModel model)
+        {
+            return StatusUpdate(model, OrderStatus.Ready);
+        }
+
+        public bool TakeOrderGiven(OrderBindingModel model)
+        {
+            return StatusUpdate(model, OrderStatus.Given);
+        }
+
+		public OrderViewModel? ReadElement(OrderSearchModel model)
+        {
+			if (model == null)
+			{
+				throw new ArgumentNullException(nameof(model));
+			}
+
+			_logger.LogInformation("ReadElement. Order ID:{ OrderID}", model.ID);
+
+			var element = _orderStorage.GetElement(model);
+
+			if (element == null)
+			{
+				_logger.LogWarning("ReadElement element not found");
+				return null;
+			}
+
+			_logger.LogInformation("ReadElement find. ID:{ID}", element.ID);
+			return element;
+		}
+
+		public List<OrderViewModel>? ReadList(OrderSearchModel? model)
+        {
+            _logger.LogInformation("Order. OrderID:{Id}", model?.ID);
+            var list = model == null ? _orderStorage.GetFullList() : _orderStorage.GetFilteredList(model);
+            if (list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return null;
+            }
+            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
+            return list;
+        }
+
+        private void CheckModel(OrderBindingModel model, bool withParams = true)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            if (!withParams)
+            {
+                return;
+            }
+            if (model.Price <= 0)
+            {
+                throw new ArgumentNullException("Incorrect Price", nameof(model.Price));
+            }
+            if (string.IsNullOrEmpty(model.SellerID.ToString()) && model.SellerID < 0)
+            {
+                throw new ArgumentNullException("Incorrect seller ID", nameof(model.SellerID));
+            }
+            _logger.LogInformation("Order. OrderID:{ ID}. SellerID: { SellerID}", model.ID, model.SellerID);
+        }
+    }
+}

ComputerStoreBusinessLogic/BusinessLogic/PCLogic.cs

@@ -0,0 +1,117 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreContracts.BusinessLogicContracts;
+using ComputerStoreContracts.SearchModels;
+using ComputerStoreContracts.StorageContracts;
+using ComputerStoreContracts.ViewModels;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreBusinessLogic.BusinessLogic
+{
+    public class PCLogic : IPCLogic
+    {
+        private readonly ILogger _logger;
+        private readonly IPCStorage _PCStorage;
+        public PCLogic(ILogger<PCLogic> logger, IPCStorage PCStorage)
+        {
+            _logger = logger;
+            _PCStorage = PCStorage;
+        }
+
+        public bool Create(PCBindingModel model)
+        {
+            CheckModel(model);
+            if (_PCStorage.Insert(model) == null)
+            {
+                _logger.LogWarning("Insert operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public bool Update(PCBindingModel model)
+        {
+            CheckModel(model);
+            if (_PCStorage.Update(model) == null)
+            {
+                _logger.LogWarning("Update operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public bool Delete(PCBindingModel model)
+        {
+            CheckModel(model, false);
+            _logger.LogInformation("Delete. ID:{ID}", model.ID);
+            if (_PCStorage.Delete(model) == null)
+            {
+                _logger.LogWarning("Delete operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public PCViewModel? ReadElement(PCSearchModel model)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+
+            _logger.LogInformation("ReadElement. PCName:{PCName}.ID:{ ID}", model.Name, model.ID);
+
+            var element = _PCStorage.GetElement(model);
+
+            if (element == null)
+            {
+                _logger.LogWarning("ReadElement element not found");
+                return null;
+            }
+
+            _logger.LogInformation("ReadElement find. ID:{ID}", element.ID);
+            return element;
+        }
+
+        public List<PCViewModel>? ReadList(PCSearchModel? model)
+        {
+            _logger.LogInformation("ReadList. PCName:{PCName}. ID:{ ID}", model?.Name, model?.ID);
+
+            var list = model == null ? _PCStorage.GetFullList() : _PCStorage.GetFilteredList(model);
+
+            if (list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return null;
+            }
+            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
+            return list;
+        }
+
+        private void CheckModel(PCBindingModel model, bool withParams = true)
+        {
+            if (model == null) { return; }
+            if (!withParams) { return; }
+            if (string.IsNullOrEmpty(model.Name)) { throw new ArgumentNullException("Invalid PC's name", nameof(model)); }
+            if (model.Price <= 0) { throw new ArgumentNullException("Invalid PC's price", nameof(model)); }
+            if (string.IsNullOrEmpty(model.EmployeeID.ToString())) { throw new ArgumentNullException("Invalid PC's employee ID", nameof(model)); }
+            if (string.IsNullOrEmpty(model.RequestID.ToString())) { throw new ArgumentNullException("Invalid PC's request ID", nameof(model)); }
+
+            _logger.LogInformation("PC. RequestID: {RequestID}. EmployeeID: {EmployeeID}. PCName:{PCName}. Cost:{ Cost}. ID: { ID} ",model.RequestID,model.EmployeeID, model.Name, model.Price, model.ID);
+
+            var element = _PCStorage.GetElement(new PCSearchModel
+            {
+                Name = model.Name
+            });
+
+            if (element != null && element.ID != model.ID)
+            {
+                throw new InvalidOperationException("PC with such name already exists.");
+            }
+        }
+    }
+}

ComputerStoreBusinessLogic/BusinessLogic/ProductLogic.cs

@@ -0,0 +1,121 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreContracts.BusinessLogicContracts;
+using ComputerStoreContracts.SearchModels;
+using ComputerStoreContracts.StorageContracts;
+using ComputerStoreContracts.ViewModels;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreBusinessLogic.BusinessLogic
+{
+    public class ProductLogic : IProductLogic
+    {
+        private readonly ILogger _logger;
+        private readonly IProductStorage _productStorage;
+        public ProductLogic(ILogger<ProductLogic> logger, IProductStorage productStorage)
+        {
+            _logger = logger;
+            _productStorage = productStorage;
+        }
+
+        public bool Create(ProductBindingModel model)
+        {
+            CheckModel(model);
+            if (_productStorage.Insert(model) == null)
+            {
+                _logger.LogWarning("Insert operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public bool Update(ProductBindingModel model)
+        {
+            if(string.IsNullOrEmpty(model.Name))
+            {
+                model.Name = _productStorage.GetElement(new ProductSearchModel { ID = model.ID }).Name;
+            }
+
+            CheckModel(model);
+            if (_productStorage.Update(model) == null)
+            {
+                _logger.LogWarning("Update operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public bool Delete(ProductBindingModel model)
+        {
+            CheckModel(model, false);
+            _logger.LogInformation("Delete. ID:{ID}", model.ID);
+            if (_productStorage.Delete(model) == null)
+            {
+                _logger.LogWarning("Delete operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public ProductViewModel? ReadElement(ProductSearchModel model)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+
+            _logger.LogInformation("ReadElement. ProductName:{ProductName}.ID:{ ID}", model.Name, model.ID);
+
+            var element = _productStorage.GetElement(model);
+
+            if (element == null)
+            {
+                _logger.LogWarning("ReadElement element not found");
+                return null;
+            }
+
+            _logger.LogInformation("ReadElement find. ID:{ID}", element.ID);
+            return element;
+        }
+
+        public List<ProductViewModel>? ReadList(ProductSearchModel? model)
+        {
+            _logger.LogInformation("ReadList. ProductName:{ProductName}. ID:{ ID}", model?.Name, model?.ID);
+
+            var list = model == null ? _productStorage.GetFullList() : _productStorage.GetFilteredList(model);
+
+            if (list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return null;
+            }
+            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
+            return list;
+        }
+
+        private void CheckModel(ProductBindingModel model, bool withParams = true)
+        {
+            if (model == null) { return; }
+            if (!withParams) { return; }
+            if (string.IsNullOrEmpty(model.Name)) { throw new ArgumentNullException("Invalid product's name", nameof(model)); }
+            if (model.Price <= 0) { throw new ArgumentNullException("Invalid product's price", nameof(model)); }
+            if (string.IsNullOrEmpty(model.EmployeeID.ToString())) { throw new ArgumentNullException("Invalid Product's employee ID", nameof(model)); }
+
+            _logger.LogInformation("Product. EmployeeID: {EmployeeID}. product:{product}. Cost:{ Cost}. ID: { ID} ",model.EmployeeID, model.Name, model.Price, model.ID);
+
+            var element = _productStorage.GetElement(new ProductSearchModel
+            {
+                Name = model.Name
+            });
+
+            if (element != null && element.ID != model.ID)
+            {
+                throw new InvalidOperationException("Product with such name already exists.");
+            }
+        }
+    }
+}

ComputerStoreBusinessLogic/BusinessLogic/ReportOrderLogic.cs

@@ -0,0 +1,125 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreContracts.BusinessLogicContracts;
+using ComputerStoreContracts.SearchModels;
+using ComputerStoreContracts.StorageContracts;
+using ComputerStoreContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreBusinessLogic.BusinessLogic
+{
+    public class ReportOrderLogic : IReportOrderLogic
+    {
+        private readonly IOrderStorage _orderStorage;
+        private readonly IConsignmentStorage _consignmentStorage;
+        private readonly IRequestStorage _requestStorage;
+        private readonly IPCStorage _pcStorage;
+
+        public ReportOrderLogic(
+            IOrderStorage orderStorage,
+            IConsignmentStorage consignmentStorage,
+            IRequestStorage requestStorage,
+            IPCStorage pcStorage)
+        {
+            _orderStorage = orderStorage;
+            _consignmentStorage = consignmentStorage;
+            _requestStorage = requestStorage;
+            _pcStorage = pcStorage;
+        }
+
+        public ReportOrderViewModel GetPCsByOrders(ReportOrderBindingModel model)
+        {
+            var report = new ReportOrderViewModel();
+            List<OrderViewModel> orders = new List<OrderViewModel>();
+
+            foreach (var orderSearch in model.Orders)
+            {
+                var element = _orderStorage.GetElement(orderSearch);
+                if (element == null)
+                {
+                    throw new Exception("Selected order is not find.");
+                }
+                orders.Add(element);
+            }
+
+            foreach (var order in orders)
+            {
+                if (order.OrderRequests == null) { continue; }
+                report.OrderPCs.Add(order.ID, (new(), new()));
+
+                foreach (var requestRaw in order.OrderRequests)
+                {
+                    var request = _requestStorage.GetElement(new RequestSearchModel { ID = requestRaw.ID });
+                    if (request == null) { throw new Exception("Request for report is not find."); }
+
+                    var pc = _pcStorage.GetElement(new PCSearchModel { ID = request.PCID });
+                    if (pc == null) { throw new Exception("PC for report is not find."); }
+
+                    report.OrderPCs[order.ID].Item1.Add(request);
+                    report.OrderPCs[order.ID].Item2.Add(pc);
+                }
+            }
+            return report;
+        }
+
+        public ReportOrderByDateViewModel GetOrdersByDate(ReportDateBindingModel model)
+        {
+            var report = new ReportOrderByDateViewModel();
+            var orders = _orderStorage.GetFullList();
+            foreach (var order in orders)
+            {
+                if (order.OrderConsignments == null && order.OrderRequests == null) { continue; }
+
+                if (order.DateCreate >= model.DateFrom && order.DateCreate <= model.DateTo)
+                {
+                    report.OrderConsignmentsAndRequests.Add(order.ID, (new(), new()));
+
+                    if (order.OrderConsignments != null)
+                    {
+                        foreach (var consignmentRaw in order.OrderConsignments)
+                        {
+                            var consignment = _consignmentStorage.GetElement(new ConsignmentSearchModel { ID = consignmentRaw.ID });
+                            if (consignment == null)
+                            {
+                                throw new Exception("Consignment for create report is not found");
+                            }
+                            report.OrderConsignmentsAndRequests[order.ID].Item1.Add(consignment);
+                        }
+                    }
+
+                    if (order.OrderRequests != null)
+                    {
+                        foreach (var requestRaw in order.OrderRequests)
+                        {
+                            var request = _requestStorage.GetElement(new RequestSearchModel { ID = requestRaw.ID });
+                            if (request == null)
+                            {
+                                throw new Exception("Request for create report is not found");
+                            }
+                            report.OrderConsignmentsAndRequests[order.ID].Item2.Add(request);
+                        }
+                    }
+                }
+            }
+            return report;
+        }
+
+        public void SaveOrdersToExcelFile(ReportOrderBindingModel model)
+        {
+            throw new NotImplementedException();
+        }
+
+        public void SaveOrdersToPdfFile(ReportDateBindingModel model)
+        {
+            throw new NotImplementedException();
+        }
+
+        public void SaveOrdersToWordFile(ReportOrderBindingModel model)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}

ComputerStoreBusinessLogic/BusinessLogic/RequestComponentLogic.cs

@@ -0,0 +1,38 @@
+using ComputerStoreContracts.BusinessLogicContracts;
+using ComputerStoreContracts.SearchModels;
+using ComputerStoreContracts.StorageContracts;
+using ComputerStoreContracts.ViewModels;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreBusinessLogic.BusinessLogic
+{
+    public class RequestComponentLogic : IRequestComponentLogic
+    {
+        private readonly ILogger _logger;
+        private readonly IRequestComponentStorage _requestComponentStorage;
+        public RequestComponentLogic(ILogger<PCLogic> logger, IRequestComponentStorage requestComponentStorage)
+        {
+            _logger = logger;
+            _requestComponentStorage = requestComponentStorage;
+        }
+
+        public List<RequestComponentViewModel>? ReadList(RequestSearchModel model)
+        {
+            _logger.LogInformation("ReadList. PCID:{ PCID}. OrderID:{ OrderID}. ID:{ ID}", model?.PCID, model?.OrderID,model?.ID);
+            var list = model.ID == null ? _requestComponentStorage.GetFullList() : _requestComponentStorage.GetFilteredList(model);
+
+            if(list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return new();
+            }
+            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
+            return list;
+        }
+    }
+}

ComputerStoreBusinessLogic/BusinessLogic/RequestLogic.cs

@@ -0,0 +1,104 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreContracts.BusinessLogicContracts;
+using ComputerStoreContracts.SearchModels;
+using ComputerStoreContracts.StorageContracts;
+using ComputerStoreContracts.ViewModels;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreBusinessLogic.BusinessLogic
+{
+    public class RequestLogic : IRequestLogic
+    {
+        private readonly ILogger _logger;
+        private readonly IRequestStorage _requestStorage;
+        public RequestLogic(ILogger<RequestLogic> logger, IRequestStorage requestStorage)
+        {
+            _logger = logger;
+            _requestStorage = requestStorage;
+        }
+
+        public bool Create(RequestBindingModel model)
+        {
+            CheckModel(model);
+            if (_requestStorage.Insert(model) == null)
+            {
+                _logger.LogWarning("Insert operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public bool Update(RequestBindingModel model)
+        {
+            CheckModel(model);
+            if (_requestStorage.Update(model) == null)
+            {
+                _logger.LogWarning("Update operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public bool Delete(RequestBindingModel model)
+        {
+            CheckModel(model, false);
+            _logger.LogInformation("Delete. ID:{ID}", model.ID);
+            if (_requestStorage.Delete(model) == null)
+            {
+                _logger.LogWarning("Delete operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public RequestViewModel? ReadElement(RequestSearchModel model)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+
+            _logger.LogInformation("ReadElement. Request ID:{ ID}. Order ID:{ OrderID}", model.ID, model.OrderID);
+
+            var element = _requestStorage.GetElement(model);
+
+            if (element == null)
+            {
+                _logger.LogWarning("ReadElement element not found");
+                return null;
+            }
+
+            _logger.LogInformation("ReadElement find. ID:{ID}", element.ID);
+            return element;
+        }
+
+        public List<RequestViewModel>? ReadList(RequestSearchModel? model)
+        {
+            _logger.LogInformation("ReadList. Request ID:{ ID}. Order ID: { OrderID}", model?.ID, model?.OrderID);
+
+            var list = model == null ? _requestStorage.GetFullList() : _requestStorage.GetFilteredList(model);
+
+            if (list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return null;
+            }
+            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
+            return list;
+        }
+
+        private void CheckModel(RequestBindingModel model, bool withParams = true)
+        {
+            if (model == null) { return; }
+            if (!withParams) { return; }
+            if (model.Price <= 0) { throw new ArgumentNullException("Invalid request's price", nameof(model)); }
+
+            _logger.LogInformation("Request. Request ID:{ ID}. Order ID: { OrderID}. PC ID: { PCID}", model.ID, model.OrderID, model.PCID);
+        }
+    }
+}

ComputerStoreBusinessLogic/BusinessLogic/SellerLogic.cs

@@ -0,0 +1,122 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreContracts.BusinessLogicContracts;
+using ComputerStoreContracts.SearchModels;
+using ComputerStoreContracts.StorageContracts;
+using ComputerStoreContracts.ViewModels;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreBusinessLogic.BusinessLogic
+{
+    public class SellerLogic : ISellerLogic
+    {
+        private readonly ILogger _logger;
+        private readonly ISellerStorage _sellerStorage;
+        public SellerLogic(ILogger<SellerLogic> logger, ISellerStorage sellerStorage)
+        {
+            _logger = logger;
+            _sellerStorage = sellerStorage;
+        }
+        public bool Create(SellerBindingModel model)
+        {
+            CheckSeller(model);
+            if (_sellerStorage.Insert(model) == null)
+            {
+                _logger.LogWarning("Insert operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public bool Update(SellerBindingModel model)
+        {
+            CheckSeller(model);
+            if (_sellerStorage.Update(model) == null)
+            {
+                _logger.LogWarning("Update operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public bool Delete(SellerBindingModel model)
+        {
+            CheckSeller(model, false);
+            _logger.LogInformation("Delete. ID:{ID}", model.ID);
+            if (_sellerStorage.Delete(model) == null)
+            {
+                _logger.LogWarning("Delete operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public SellerViewModel? ReadElement(SellerSearchModel model)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            _logger.LogInformation("ReadElement. Username:{Username}.ID:{ ID}", model.Username, model.ID);
+            var element = _sellerStorage.GetElement(model);
+            if (element == null)
+            {
+                _logger.LogWarning("ReadElement element not found");
+                return null;
+            }
+            _logger.LogInformation("ReadElement find. ID:{ID}", element.ID);
+            return element;
+        }
+
+        public List<SellerViewModel>? ReadList(SellerSearchModel? model)
+        {
+            _logger.LogInformation("ReadList. Username:{Username}. ID:{ ID}", model?.Username, model?.ID);
+
+            var list = model == null ? _sellerStorage.GetFullList() : _sellerStorage.GetFilteredList(model);
+
+            if (list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return null;
+            }
+            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
+            return list;
+        }
+
+        public void CheckSeller(SellerBindingModel model, bool withParams = true)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            if (!withParams)
+            {
+                return;
+            }
+            if (string.IsNullOrEmpty(model.Username))
+            {
+                throw new ArgumentNullException("Invalid username of user", nameof(model.Username));
+            }
+            if (string.IsNullOrEmpty(model.Password))
+            {
+                throw new ArgumentNullException("Invalid password of user", nameof(model.Password));
+            }
+
+            _logger.LogInformation("Client. Username:{ Username}. ID: { ID} ", model.Username, model.ID);
+
+            var element = _sellerStorage.GetElement(new SellerSearchModel
+            {
+                Username = model.Username
+            });
+
+            if (element != null && element.ID != model.ID)
+            {
+                throw new InvalidOperationException("Seller with such username already exists.");
+            }
+        }
+    }
+}

ComputerStoreBusinessLogic/ComputerStoreBusinessLogic.csproj

@@ -0,0 +1,20 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="DocumentFormat.OpenXml" Version="2.20.0" />
+    <PackageReference Include="Microsoft.Extensions.Logging" Version="7.0.0" />
+    <PackageReference Include="PdfSharp.MigraDoc.Standard" Version="1.51.15" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\ComputerStoreContracts\ComputerStoreContracts.csproj" />
+    <ProjectReference Include="..\ComputerStoreDataModels\ComputerStoreDataModels.csproj" />
+  </ItemGroup>
+
+</Project>

ComputerStoreBusinessLogic/MailStuff/AbstractMail.cs

@@ -0,0 +1,60 @@
+using ComputerStoreContracts.BindingModels;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net.Mail;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreBusinessLogic.MailStuff
+{
+    public abstract class AbstractMail
+    {
+        protected string _mailLogin = string.Empty;
+        protected string _mailPassword = string.Empty;
+        protected string _smtpClientHost = string.Empty;
+
+        protected int _smtpClientPort;
+        protected string _popHost = string.Empty;
+        protected int _popPort;
+
+        private readonly ILogger _logger;
+
+        public AbstractMail(ILogger<AbstractMail> logger)
+        {
+            _logger = logger;           
+        }
+
+        public void MailConfig(MailConfigBindingModel config)
+        {
+            _mailLogin = config.Login;
+            _mailPassword = config.Password;
+            _smtpClientHost = config.SmtpClientHost;
+            _smtpClientPort = config.SmtpClientPort;
+            _popHost = config.PopHost;
+            _popPort = config.PopPort;
+            _logger.LogDebug("Config: {login}, {password}, {clientHost}, {clientPort}, {popHost}, {popPort}", _mailLogin, _mailPassword, _smtpClientHost, _smtpClientPort, _popHost, _popPort);
+        }
+
+        public async void MailSendAsync(string receiver, MemoryStream report)
+        {
+            if (string.IsNullOrEmpty(_mailLogin) || string.IsNullOrEmpty(_mailPassword))
+            {
+                return;
+            }
+            if (string.IsNullOrEmpty(_smtpClientHost) || _smtpClientPort == 0)
+            {
+                return;
+            }
+            if (string.IsNullOrEmpty(receiver))
+            {
+                return;
+            }           
+            _logger.LogDebug("Send E-mail: {To}, {Subject}", receiver, "Report");
+            await SendMailAsync(receiver,report);
+        }
+
+        protected abstract Task SendMailAsync(string receiver, MemoryStream report);
+    }
+}

ComputerStoreBusinessLogic/MailStuff/MailKit.cs

@@ -0,0 +1,42 @@
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net;
+using System.Net.Mail;
+using System.Net.Mime;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreBusinessLogic.MailStuff
+{
+    public class MailKit : AbstractMail
+    {
+        public MailKit(ILogger<MailKit> logger) : base(logger)
+        {
+
+        }
+        protected override async Task SendMailAsync(string receiver, MemoryStream report)
+        {
+            using var objMailMessage = new MailMessage();
+            using var objSmtpClient = new SmtpClient(_smtpClientHost, _smtpClientPort);
+            try
+            {
+                objMailMessage.From = new MailAddress(_mailLogin);
+                objMailMessage.To.Add(new MailAddress(receiver));
+                objMailMessage.Subject = "Report";
+                objMailMessage.Attachments.Add(new Attachment(report, "ReportProductsPCs.pdf", "application/pdf"));
+                objMailMessage.SubjectEncoding = Encoding.UTF8;
+                objSmtpClient.UseDefaultCredentials = false;
+                objSmtpClient.EnableSsl = true;
+                objSmtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;
+                objSmtpClient.Credentials = new NetworkCredential(_mailLogin, _mailPassword);
+                await Task.Run(() => objSmtpClient.Send(objMailMessage));
+            }
+            catch (Exception)
+            {
+                throw;
+            }
+        }
+    }
+}

ComputerStoreBusinessLogic/OfficePackage/AbstractSaveToExcel.cs

@@ -0,0 +1,102 @@
+using ComputerStoreBusinessLogic.OfficePackage.HelperEnums;
+using ComputerStoreBusinessLogic.OfficePackage.HelperModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreBusinessLogic.OfficePackage
+{
+    public abstract class AbstractSaveToExcel
+    {
+        public MemoryStream CreateReport(ExcelInfo info)
+        {
+            
+            CreateExcel(info);
+            InsertCellInWorksheet(new ExcelCellParameters
+            {
+                ColumnName = "A",
+                RowIndex = 1,
+                Text = info.Title,
+                StyleInfo = ExcelStyleInfoType.Title
+            });
+            MergeCells(new ExcelMergeParameters
+            {
+                CellFromName = "A1",
+                CellToName = "C1"
+            });
+            uint rowIndex = 2;
+            foreach (var consignment in info.ConsignmentProducts)
+            {
+                InsertCellInWorksheet(new ExcelCellParameters
+                {
+                    ColumnName = "A",
+                    RowIndex = rowIndex,
+                    Text = $"ConsignmentID: {consignment.ID}",
+                    StyleInfo = ExcelStyleInfoType.Text
+                });                
+                rowIndex++;
+                foreach (var (Product, Count) in consignment.Products)
+                {
+                    InsertCellInWorksheet(new ExcelCellParameters
+                    {
+                        ColumnName = "B",
+                        RowIndex = rowIndex,
+                        Text = "ProductID:",
+                        StyleInfo = ExcelStyleInfoType.TextWithBroder
+                    });
+                    InsertCellInWorksheet(new ExcelCellParameters
+                    {
+                        ColumnName = "C",
+                        RowIndex = rowIndex,
+                        Text = Product,
+                        StyleInfo = ExcelStyleInfoType.TextWithBroder
+                    });
+                    InsertCellInWorksheet(new ExcelCellParameters
+                    {
+                        ColumnName = "E",
+                        RowIndex = rowIndex,
+                        Text = "Count:",
+                        StyleInfo = ExcelStyleInfoType.TextWithBroder
+                    });
+                    InsertCellInWorksheet(new ExcelCellParameters
+                    {
+                        ColumnName = "F",
+                        RowIndex = rowIndex,
+                        Text = Count.ToString(),
+                        StyleInfo = ExcelStyleInfoType.TextWithBroder
+                    });
+                    rowIndex+=2;
+                }
+                rowIndex++;
+                InsertCellInWorksheet(new ExcelCellParameters
+                {
+                    ColumnName = "B",
+                    RowIndex = rowIndex,
+                    Text = "Total products:",
+                    StyleInfo = ExcelStyleInfoType.Text
+                });
+                InsertCellInWorksheet(new ExcelCellParameters
+                {
+                    ColumnName = "C",
+                    RowIndex = rowIndex,
+                    Text = consignment.Products.Count.ToString(),
+                    StyleInfo = ExcelStyleInfoType.Text
+                });
+                rowIndex+=3;
+            }
+            return SaveExcel(info);
+            
+            
+        }
+
+        protected abstract void CreateExcel(ExcelInfo info);
+
+        protected abstract void InsertCellInWorksheet(ExcelCellParameters excelParams);
+
+        protected abstract void MergeCells(ExcelMergeParameters excelParams);
+
+        protected abstract MemoryStream SaveExcel(ExcelInfo info);
+    }
+}

ComputerStoreBusinessLogic/OfficePackage/AbstractSaveToPDF.cs

@@ -0,0 +1,88 @@
+using ComputerStoreBusinessLogic.OfficePackage.HelperEnums;
+using ComputerStoreBusinessLogic.OfficePackage.HelperModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreBusinessLogic.OfficePackage
+{
+    public abstract class AbstractSaveToPDF
+    {
+        public MemoryStream CreateDoc(PDFInfo info)
+        {
+            CreatePDF(info);
+            CreateParagraph(new PDFParagraph
+            {
+                Text = info.Title,
+                Style = "NormalTitle",
+                ParagraphAlignment = PDFParagraphAlignmentType.Center
+            });
+            CreateParagraph(new PDFParagraph
+            {
+                Text = $"from {info.DateFrom.ToShortDateString()} to {info.DateTo.ToShortDateString()}",
+                Style = "Normal",
+                ParagraphAlignment = PDFParagraphAlignmentType.Center
+            });
+            CreateTable(new List<string> { "7cm", "3cm", "2cm", "5cm"});
+            CreateRow(new PDFRowParameters
+            {
+                Texts = new List<string> { "PC's name", "Employee's username", "Total", "Components" },
+                Style = "NormalTitle",
+                ParagraphAlignment = PDFParagraphAlignmentType.Center
+            });
+            foreach (var pc in info.PCs)
+            {
+                CreateComplicatedRow(new PDFRowParameters
+                {
+                    Texts = new List<string> { pc.PCName, pc.EmployeeUsername, pc.Price.ToString() },
+                    Style = "Normal",
+                    ParagraphAlignment = PDFParagraphAlignmentType.Left
+                },pc.Components);
+            }
+            CreateTable(new List<string> { "7cm", "3cm", "2cm", "5cm" });
+            CreateRow(new PDFRowParameters
+            {
+                Texts = new List<string> { "Product's name", "Employee's username", "Total", "Components" },
+                Style = "NormalTitle",
+                ParagraphAlignment = PDFParagraphAlignmentType.Center
+            });
+            foreach (var product in info.Products)
+            {
+                CreateComplicatedRow(new PDFRowParameters
+                {
+                    Texts = new List<string> { product.ProductName, product.EmployeeUsername, product.Price.ToString() },
+                    Style = "Normal",
+                    ParagraphAlignment = PDFParagraphAlignmentType.Left
+                },product.Components);
+            }
+            CreateParagraph(new PDFParagraph
+            {
+                Text = $"Total by products: {info.Products.Sum(x => x.Price)}\t",
+                Style = "Normal",
+                ParagraphAlignment = PDFParagraphAlignmentType.Right
+            });
+            CreateParagraph(new PDFParagraph
+            {
+                Text = $"Total by pcs: {info.PCs.Sum(x => x.Price)}\t",
+                Style = "Normal",
+                ParagraphAlignment = PDFParagraphAlignmentType.Right
+            });
+            CreateParagraph(new PDFParagraph
+            {
+                Text = $"Total: {info.PCs.Sum(x => x.Price) + info.Products.Sum(x => x.Price)}\t",
+                Style = "Normal",
+                ParagraphAlignment = PDFParagraphAlignmentType.Right
+            });
+            return SavePDF(info);
+        }
+
+        protected abstract MemoryStream SavePDF(PDFInfo info);
+        protected abstract void CreatePDF(PDFInfo info);
+        protected abstract void CreateParagraph(PDFParagraph PDFParagraph);
+        protected abstract void CreateTable(List<string> columns);
+        protected abstract void CreateRow(PDFRowParameters rowParameters);
+        protected abstract void CreateComplicatedRow(PDFRowParameters rowParameters, IEnumerable<(string,int)> components);
+    }
+}

ComputerStoreBusinessLogic/OfficePackage/AbstractSaveToWord.cs

@@ -0,0 +1,59 @@
+using ComputerStoreBusinessLogic.OfficePackage.HelperEnums;
+using ComputerStoreBusinessLogic.OfficePackage.HelperModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreBusinessLogic.OfficePackage
+{
+    public abstract class AbstractSaveToWord
+    {
+        public MemoryStream CreateDoc(WordInfo info)
+        {
+            CreateWord(info);
+            CreateParagraph(new WordParagraph
+            {
+                Texts = new List<(string, WordTextProperties)> { (info.Title, new WordTextProperties { Bold = true, Size = "24", }) },
+                TextProperties = new WordTextProperties
+                {
+                    Size = "24",
+                    JustificationType = WordJustificationType.Center
+                }
+            });
+            foreach (var consigment in info.Consignments)
+            {
+                CreateParagraph(new WordParagraph
+                {
+                    Texts = new List<(string, WordTextProperties)> { ($"ConsignmentID:  {consigment.ID}", new WordTextProperties { Bold = true, Size = "24", }) },
+                    TextProperties = new WordTextProperties
+                    {
+                        Size = "24",
+                        JustificationType = WordJustificationType.Both
+                    }
+                });
+
+                foreach(var products in consigment.Products)
+                {
+                    CreateParagraph(new WordParagraph
+                    {
+                        Texts = new List<(string, WordTextProperties)> { 
+                            ($"ProductID:  {products.product}     ", new WordTextProperties { Bold = false, Size = "24", }), ($"ProductCount:  {products.count}", new WordTextProperties { Bold = false, Size = "24", }) },
+                        TextProperties = new WordTextProperties
+                        {
+                            Size = "24",
+                            JustificationType = WordJustificationType.Both
+                        }
+                    });
+                }
+
+            }
+            return SaveWord(info);
+        }
+
+        protected abstract void CreateWord(WordInfo info);
+        protected abstract void CreateParagraph(WordParagraph paragraph);
+        protected abstract MemoryStream SaveWord(WordInfo info);
+    }
+}

ComputerStoreBusinessLogic/OfficePackage/HelperEnums/ExcelStyleInfoType.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreBusinessLogic.OfficePackage.HelperEnums
+{
+    public enum ExcelStyleInfoType
+    {
+        Title,
+        Text,
+        TextWithBroder
+    }
+}

ComputerStoreBusinessLogic/OfficePackage/HelperEnums/PDFParagraphAlignmentType.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreBusinessLogic.OfficePackage.HelperEnums
+{
+    public enum PDFParagraphAlignmentType
+    {
+        Center,
+
+        Left,
+
+        Right
+    }
+}

ComputerStoreBusinessLogic/OfficePackage/HelperEnums/WordJustificationType.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreBusinessLogic.OfficePackage.HelperEnums
+{
+    public enum WordJustificationType
+    {
+        Center,
+        Both
+    }
+}

ComputerStoreBusinessLogic/OfficePackage/HelperModels/ExcelCellParameters.cs

@@ -0,0 +1,18 @@
+using ComputerStoreBusinessLogic.OfficePackage.HelperEnums;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreBusinessLogic.OfficePackage.HelperModels
+{
+    public class ExcelCellParameters
+    {
+        public string ColumnName { get; set; } = string.Empty;
+        public uint RowIndex { get; set; }
+        public string Text { get; set; } = string.Empty;
+        public string CellReference => $"{ColumnName}{RowIndex}";
+        public ExcelStyleInfoType StyleInfo { get; set; }
+    }
+}

ComputerStoreBusinessLogic/OfficePackage/HelperModels/ExcelInfo.cs

@@ -0,0 +1,21 @@
+using ComputerStoreContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreBusinessLogic.OfficePackage.HelperModels
+{
+    public class ExcelInfo
+    {
+        public string FileName { get; set; } = string.Empty;
+        public string Title { get; set; } = string.Empty;
+        public List<ReportConsignmentsViewModel> ConsignmentProducts
+        {
+            get;
+            set;
+        } = new();
+               
+    }
+}

ComputerStoreBusinessLogic/OfficePackage/HelperModels/ExcelMergeParameters.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreBusinessLogic.OfficePackage.HelperModels
+{
+    public class ExcelMergeParameters
+    {
+        public string CellFromName { get; set; } = string.Empty;
+        public string CellToName { get; set; } = string.Empty;
+        public string Merge => $"{CellFromName}:{CellToName}";
+    }
+}

ComputerStoreBusinessLogic/OfficePackage/HelperModels/PDFInfo.cs

@@ -0,0 +1,19 @@
+using ComputerStoreContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreBusinessLogic.OfficePackage.HelperModels
+{
+    public class PDFInfo
+    {
+        public string FileName { get; set; } = string.Empty;
+        public string Title { get; set; } = string.Empty;
+        public DateTime DateFrom { get; set; }
+        public DateTime DateTo { get; set; }
+        public List<ReportPCByDateViewModel> PCs { get; set; } = new();
+        public List<ReportProductByDateViewModel> Products { get; set; } = new();
+    }
+}

ComputerStoreBusinessLogic/OfficePackage/HelperModels/PDFParagraph.cs

@@ -0,0 +1,16 @@
+using ComputerStoreBusinessLogic.OfficePackage.HelperEnums;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreBusinessLogic.OfficePackage.HelperModels
+{
+    public class PDFParagraph
+    {
+        public string Text { get; set; } = string.Empty;
+        public string Style { get; set; } = string.Empty;
+        public PDFParagraphAlignmentType ParagraphAlignment { get; set; }
+    }
+}

ComputerStoreBusinessLogic/OfficePackage/HelperModels/PDFRowParameters.cs

@@ -0,0 +1,16 @@
+using ComputerStoreBusinessLogic.OfficePackage.HelperEnums;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreBusinessLogic.OfficePackage.HelperModels
+{
+    public class PDFRowParameters
+    {
+        public List<string> Texts { get; set; } = new();
+        public string Style { get; set; } = string.Empty;
+        public PDFParagraphAlignmentType ParagraphAlignment { get; set; }
+    }
+}

ComputerStoreBusinessLogic/OfficePackage/HelperModels/WordInfo.cs

@@ -0,0 +1,16 @@
+using ComputerStoreContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreBusinessLogic.OfficePackage.HelperModels
+{
+    public class WordInfo
+    {
+        public string FileName { get; set; } = string.Empty;
+        public string Title { get; set; } = string.Empty;
+        public List<ReportConsignmentsViewModel> Consignments { get; set; } = new();
+    }
+}

ComputerStoreBusinessLogic/OfficePackage/HelperModels/WordParagraph.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreBusinessLogic.OfficePackage.HelperModels
+{
+    public class WordParagraph
+    {
+        public List<(string, WordTextProperties)> Texts { get; set; } = new();
+        public WordTextProperties? TextProperties { get; set; }
+    }
+}

ComputerStoreBusinessLogic/OfficePackage/HelperModels/WordTextProperties.cs

@@ -0,0 +1,16 @@
+using ComputerStoreBusinessLogic.OfficePackage.HelperEnums;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreBusinessLogic.OfficePackage.HelperModels
+{
+    public class WordTextProperties
+    {
+        public string Size { get; set; } = string.Empty;
+        public bool Bold { get; set; }
+        public WordJustificationType JustificationType { get; set; }
+    }
+}

ComputerStoreBusinessLogic/OfficePackage/Implements/SaveToExcel.cs

@@ -0,0 +1,357 @@
+using ComputerStoreBusinessLogic.OfficePackage.HelperEnums;
+using ComputerStoreBusinessLogic.OfficePackage.HelperModels;
+using DocumentFormat.OpenXml;
+using DocumentFormat.OpenXml.Office2010.Excel;
+using DocumentFormat.OpenXml.Office2013.Excel;
+using DocumentFormat.OpenXml.Packaging;
+using DocumentFormat.OpenXml.Spreadsheet;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreBusinessLogic.OfficePackage.Implements
+{
+    public class SaveToExcel : AbstractSaveToExcel
+    {
+        private SpreadsheetDocument? _spreadsheetDocument;
+        private SharedStringTablePart? _shareStringPart;
+        private Worksheet? _worksheet;
+        private MemoryStream mem;
+        private static void CreateStyles(WorkbookPart workbookpart)
+        {
+            var sp = workbookpart.AddNewPart<WorkbookStylesPart>();
+            sp.Stylesheet = new Stylesheet();
+            var fonts = new Fonts() { Count = 2U, KnownFonts = true };
+
+            var fontUsual = new Font();
+            fontUsual.Append(new FontSize() { Val = 12D });
+            fontUsual.Append(new DocumentFormat.OpenXml.Office2010.Excel.Color()
+            { Theme = 1U });
+            fontUsual.Append(new FontName() { Val = "Times New Roman" });
+            fontUsual.Append(new FontFamilyNumbering() { Val = 2 });
+            fontUsual.Append(new FontScheme() { Val = FontSchemeValues.Minor });
+
+            var fontTitle = new Font();
+            fontTitle.Append(new Bold());
+            fontTitle.Append(new FontSize() { Val = 14D });
+            fontTitle.Append(new DocumentFormat.OpenXml.Office2010.Excel.Color()
+            { Theme = 1U });
+            fontTitle.Append(new FontName() { Val = "Times New Roman" });
+            fontTitle.Append(new FontFamilyNumbering() { Val = 2 });
+            fontTitle.Append(new FontScheme() { Val = FontSchemeValues.Minor });
+
+            fonts.Append(fontUsual);
+            fonts.Append(fontTitle);
+
+            var fills = new Fills() { Count = 2U };
+            var fill1 = new Fill();
+            fill1.Append(new PatternFill() { PatternType = PatternValues.None });
+            var fill2 = new Fill();
+            fill2.Append(new PatternFill()
+            {
+                PatternType = PatternValues.Gray125
+            });
+            fills.Append(fill1);
+            fills.Append(fill2);
+
+            var borders = new Borders() { Count = 2U };
+            var borderNoBorder = new Border();
+            borderNoBorder.Append(new LeftBorder());
+            borderNoBorder.Append(new RightBorder());
+            borderNoBorder.Append(new TopBorder());
+            borderNoBorder.Append(new BottomBorder());
+            borderNoBorder.Append(new DiagonalBorder());
+            var borderThin = new Border();
+            var leftBorder = new LeftBorder() { Style = BorderStyleValues.Thin };
+            leftBorder.Append(new DocumentFormat.OpenXml.Office2010.Excel.Color()
+            { Indexed = 64U });
+            var rightBorder = new RightBorder()
+            {
+                Style = BorderStyleValues.Thin
+            };
+            rightBorder.Append(new
+           DocumentFormat.OpenXml.Office2010.Excel.Color()
+            { Indexed = 64U });
+            var topBorder = new TopBorder() { Style = BorderStyleValues.Thin };
+            topBorder.Append(new DocumentFormat.OpenXml.Office2010.Excel.Color()
+            { Indexed = 64U });
+            var bottomBorder = new BottomBorder()
+            {
+                Style =
+           BorderStyleValues.Thin
+            };
+            bottomBorder.Append(new
+           DocumentFormat.OpenXml.Office2010.Excel.Color()
+            { Indexed = 64U });
+            borderThin.Append(leftBorder);
+            borderThin.Append(rightBorder);
+            borderThin.Append(topBorder);
+            borderThin.Append(bottomBorder);
+            borderThin.Append(new DiagonalBorder());
+            borders.Append(borderNoBorder);
+            borders.Append(borderThin);
+            var cellStyleFormats = new CellStyleFormats() { Count = 1U };
+            var cellFormatStyle = new CellFormat()
+            {
+                NumberFormatId = 0U,
+                FontId
+           = 0U,
+                FillId = 0U,
+                BorderId = 0U
+            };
+            cellStyleFormats.Append(cellFormatStyle);
+            var cellFormats = new CellFormats() { Count = 3U };
+            var cellFormatFont = new CellFormat()
+            {
+                NumberFormatId = 0U,
+                FontId =
+           0U,
+                FillId = 0U,
+                BorderId = 0U,
+                FormatId = 0U,
+                ApplyFont = true
+            };
+            var cellFormatFontAndBorder = new CellFormat()
+            {
+                NumberFormatId = 0U,
+                FontId = 0U,
+                FillId = 0U,
+                BorderId = 1U,
+                FormatId = 0U,
+                ApplyFont = true,
+                ApplyBorder = true
+            };
+            var cellFormatTitle = new CellFormat()
+            {
+                NumberFormatId = 0U,
+                FontId
+           = 1U,
+                FillId = 0U,
+                BorderId = 0U,
+                FormatId = 0U,
+                Alignment = new Alignment()
+                {
+                    Vertical = VerticalAlignmentValues.Center,
+                    WrapText = true,
+                    Horizontal =
+           HorizontalAlignmentValues.Center
+                },
+                ApplyFont = true
+            };
+            cellFormats.Append(cellFormatFont);
+            cellFormats.Append(cellFormatFontAndBorder);
+            cellFormats.Append(cellFormatTitle);
+            var cellStyles = new CellStyles() { Count = 1U };
+            cellStyles.Append(new CellStyle()
+            {
+                Name = "Normal",
+                FormatId = 0U,
+                BuiltinId = 0U
+            });
+            var differentialFormats = new
+           DocumentFormat.OpenXml.Office2013.Excel.DifferentialFormats()
+            { Count = 0U };
+
+            var tableStyles = new TableStyles()
+            {
+                Count = 0U,
+                DefaultTableStyle =
+           "TableStyleMedium2",
+                DefaultPivotStyle = "PivotStyleLight16"
+            };
+            var stylesheetExtensionList = new StylesheetExtensionList();
+            var stylesheetExtension1 = new StylesheetExtension()
+            {
+                Uri =
+           "{EB79DEF2-80B8-43e5-95BD-54CBDDF9020C}"
+            };
+            stylesheetExtension1.AddNamespaceDeclaration("x14",
+           "http://schemas.microsoft.com/office/spreadsheetml/2009/9/main");
+            stylesheetExtension1.Append(new SlicerStyles()
+            {
+                DefaultSlicerStyle =
+           "SlicerStyleLight1"
+            });
+            var stylesheetExtension2 = new StylesheetExtension()
+            {
+                Uri =
+           "{9260A510-F301-46a8-8635-F512D64BE5F5}"
+            };
+            stylesheetExtension2.AddNamespaceDeclaration("x15",
+           "http://schemas.microsoft.com/office/spreadsheetml/2010/11/main");
+            stylesheetExtension2.Append(new TimelineStyles()
+            {
+                DefaultTimelineStyle = "TimeSlicerStyleLight1"
+            });
+            stylesheetExtensionList.Append(stylesheetExtension1);
+            stylesheetExtensionList.Append(stylesheetExtension2);
+            sp.Stylesheet.Append(fonts);
+            sp.Stylesheet.Append(fills);
+            sp.Stylesheet.Append(borders);
+            sp.Stylesheet.Append(cellStyleFormats);
+            sp.Stylesheet.Append(cellFormats);
+            sp.Stylesheet.Append(cellStyles);
+            sp.Stylesheet.Append(differentialFormats);
+            sp.Stylesheet.Append(tableStyles);
+            sp.Stylesheet.Append(stylesheetExtensionList);
+        }
+
+        private static uint GetStyleValue(ExcelStyleInfoType styleInfo)
+        {
+            return styleInfo switch
+            {
+                ExcelStyleInfoType.Title => 2U,
+                ExcelStyleInfoType.TextWithBroder => 1U,
+                ExcelStyleInfoType.Text => 0U,
+                _ => 0U,
+            };
+        }
+
+        protected override void CreateExcel(ExcelInfo info)
+        {    
+            mem = new MemoryStream();
+            _spreadsheetDocument = SpreadsheetDocument.Create(mem, SpreadsheetDocumentType.Workbook);
+            
+            var workbookpart = _spreadsheetDocument.AddWorkbookPart();
+            workbookpart.Workbook = new Workbook();
+
+            CreateStyles(workbookpart);
+
+            _shareStringPart =
+          _spreadsheetDocument.WorkbookPart!.GetPartsOfType<SharedStringTablePart>().Any()
+           ?
+          _spreadsheetDocument.WorkbookPart.GetPartsOfType<SharedStringTablePart>().First()
+           :
+          _spreadsheetDocument.WorkbookPart.AddNewPart<SharedStringTablePart>();
+
+
+            if (_shareStringPart.SharedStringTable == null)
+            {
+                _shareStringPart.SharedStringTable = new SharedStringTable();
+            }
+
+
+            var worksheetPart = workbookpart.AddNewPart<WorksheetPart>();
+            worksheetPart.Worksheet = new Worksheet(new SheetData());
+
+
+            var sheets =
+           _spreadsheetDocument.WorkbookPart.Workbook.AppendChild(new Sheets());
+            var sheet = new Sheet()
+            {
+                Id =
+           _spreadsheetDocument.WorkbookPart.GetIdOfPart(worksheetPart),
+                SheetId = 1,
+                Name = "List"
+            };
+            sheets.Append(sheet);
+            _worksheet = worksheetPart.Worksheet;
+        }
+
+        protected override void InsertCellInWorksheet(ExcelCellParameters excelParams)
+        {
+            if (_worksheet == null || _shareStringPart == null)
+            {
+                return;
+            }
+            var sheetData = _worksheet.GetFirstChild<SheetData>();
+            if (sheetData == null)
+            {
+                return;
+            }
+
+            Row row;
+            if (sheetData.Elements<Row>().Where(r => r.RowIndex! == excelParams.RowIndex).Any())
+            {
+                row = sheetData.Elements<Row>().Where(r => r.RowIndex! == excelParams.RowIndex).First();
+            }
+            else
+            {
+                row = new Row() { RowIndex = excelParams.RowIndex };
+                sheetData.Append(row);
+            }
+
+            Cell cell;
+            if (row.Elements<Cell>().Where(c => c.CellReference!.Value ==
+           excelParams.CellReference).Any())
+            {
+                cell = row.Elements<Cell>().Where(c => c.CellReference!.Value ==
+               excelParams.CellReference).First();
+            }
+            else
+            {                
+                Cell? refCell = null;
+                foreach (Cell rowCell in row.Elements<Cell>())
+                {
+                    if (string.Compare(rowCell.CellReference!.Value,
+                   excelParams.CellReference, true) > 0)
+                    {
+                        refCell = rowCell;
+                        break;
+                    }
+                }
+                var newCell = new Cell()
+                {
+                    CellReference =
+               excelParams.CellReference
+                };
+                row.InsertBefore(newCell, refCell);
+                cell = newCell;
+            }
+            
+            _shareStringPart.SharedStringTable.AppendChild(new SharedStringItem(new Text(excelParams.Text)));
+            _shareStringPart.SharedStringTable.Save();
+
+            cell.CellValue = new CellValue((_shareStringPart.SharedStringTable.Elements<SharedStringItem>().Count() - 1).ToString());
+            cell.DataType = new EnumValue<CellValues>(CellValues.SharedString);
+            cell.StyleIndex = GetStyleValue(excelParams.StyleInfo);
+        }
+
+        protected override void MergeCells(ExcelMergeParameters excelParams)
+        {
+            if (_worksheet == null)
+            {
+                return;
+            }
+            MergeCells mergeCells;
+            if (_worksheet.Elements<MergeCells>().Any())
+            {
+                mergeCells = _worksheet.Elements<MergeCells>().First();
+            }
+            else
+            {
+                mergeCells = new MergeCells();
+                if (_worksheet.Elements<CustomSheetView>().Any())
+                {
+                    _worksheet.InsertAfter(mergeCells,
+                   _worksheet.Elements<CustomSheetView>().First());
+                }
+                else
+                {
+                    _worksheet.InsertAfter(mergeCells,
+                   _worksheet.Elements<SheetData>().First());
+                }
+            }
+            var mergeCell = new MergeCell()
+            {
+                Reference = new StringValue(excelParams.Merge)
+            };
+            mergeCells.Append(mergeCell);
+        }
+
+        protected override MemoryStream SaveExcel(ExcelInfo info)
+        {
+            if (_spreadsheetDocument == null)
+            {
+                return null;
+            }
+            _spreadsheetDocument.WorkbookPart!.Workbook.Save();
+            _spreadsheetDocument.Dispose();
+
+            mem.Seek(0,SeekOrigin.Begin);
+            return mem;
+        }
+    }
+}

ComputerStoreBusinessLogic/OfficePackage/Implements/SaveToPDF.cs

@@ -0,0 +1,152 @@
+using ComputerStoreBusinessLogic.OfficePackage.HelperEnums;
+using ComputerStoreBusinessLogic.OfficePackage.HelperModels;
+using MigraDoc.DocumentObjectModel;
+using MigraDoc.DocumentObjectModel.Tables;
+using MigraDoc.Rendering;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreBusinessLogic.OfficePackage.Implements
+{
+    public class SaveToPDF : AbstractSaveToPDF
+    {
+        private Document? _document;
+        private Section? _section;
+        private Table? _table;      
+        private static ParagraphAlignment GetParagraphAlignment(PDFParagraphAlignmentType type)
+        {
+            return type switch
+            {
+                PDFParagraphAlignmentType.Center => ParagraphAlignment.Center,
+                PDFParagraphAlignmentType.Left => ParagraphAlignment.Left,
+                PDFParagraphAlignmentType.Right => ParagraphAlignment.Right,
+                _ => ParagraphAlignment.Justify,
+            };
+        }
+        private static void DefineStyles(Document document)
+        {
+            var style = document.Styles["Normal"];
+            style.Font.Name = "Times New Roman";
+            style.Font.Size = 14;
+            style = document.Styles.AddStyle("NormalTitle", "Normal");
+            style.Font.Bold = true;
+        }
+
+        protected override void CreateComplicatedRow(PDFRowParameters rowParameters, IEnumerable<(string, int)> components)
+        {
+            if (_table == null)
+            {
+                return;
+            }
+            var row = _table.AddRow();
+            for (int i = 0; i < rowParameters.Texts.Count; ++i)
+            {
+                row.Cells[i].AddParagraph(rowParameters.Texts[i]);
+                if (!string.IsNullOrEmpty(rowParameters.Style))
+                {
+                    row.Cells[i].Style = rowParameters.Style;
+                }
+                
+                Unit borderWidth = 0.5;
+                row.Cells[i].Borders.Left.Width = borderWidth;
+                row.Cells[i].Borders.Right.Width = borderWidth;
+                row.Cells[i].Borders.Top.Width = borderWidth;
+                row.Cells[i].Borders.Bottom.Width = borderWidth;
+                row.Cells[i].Format.Alignment = GetParagraphAlignment(rowParameters.ParagraphAlignment);
+                row.Cells[i].VerticalAlignment = VerticalAlignment.Center;
+                
+            }
+            foreach (var component in components)
+            {
+                row.Cells[rowParameters.Texts.Count].AddParagraph($"{component.Item1} {component.Item2}");
+                if (!string.IsNullOrEmpty(rowParameters.Style))
+                {
+                    row.Cells[rowParameters.Texts.Count].Style = rowParameters.Style;
+                }
+
+                Unit borderWidth = 0.5;
+                row.Cells[rowParameters.Texts.Count].Borders.Left.Width = borderWidth;
+                row.Cells[rowParameters.Texts.Count].Borders.Right.Width = borderWidth;
+                row.Cells[rowParameters.Texts.Count].Borders.Top.Width = borderWidth;
+                row.Cells[rowParameters.Texts.Count].Borders.Bottom.Width = borderWidth;
+                row.Cells[rowParameters.Texts.Count].Format.Alignment = GetParagraphAlignment(rowParameters.ParagraphAlignment);
+                row.Cells[rowParameters.Texts.Count].VerticalAlignment = VerticalAlignment.Center;
+            }
+        }
+
+        protected override void CreateParagraph(PDFParagraph PDFParagraph)
+        {
+            if (_section == null)
+            {
+                return;
+            }
+            var paragraph = _section.AddParagraph(PDFParagraph.Text);
+            paragraph.Format.SpaceAfter = "1cm";
+            paragraph.Format.Alignment = GetParagraphAlignment(PDFParagraph.ParagraphAlignment);
+            paragraph.Style = paragraph.Style;
+        }
+
+        protected override void CreatePDF(PDFInfo info)
+        {
+            _document = new Document();
+            DefineStyles(_document);
+            _section = _document.AddSection();
+        }
+
+        protected override void CreateRow(PDFRowParameters rowParameters)
+        {
+            if (_table == null)
+            {
+                return;
+            }
+            var row = _table.AddRow();
+            for (int i = 0; i < rowParameters.Texts.Count; ++i)
+            {
+                row.Cells[i].AddParagraph(rowParameters.Texts[i]);
+                if (!string.IsNullOrEmpty(rowParameters.Style))
+                {
+                    row.Cells[i].Style = rowParameters.Style;
+                }
+                Unit borderWidth = 0.5;
+                row.Cells[i].Borders.Left.Width = borderWidth;
+                row.Cells[i].Borders.Right.Width = borderWidth;
+                row.Cells[i].Borders.Top.Width = borderWidth;
+                row.Cells[i].Borders.Bottom.Width = borderWidth;
+                row.Cells[i].Format.Alignment = GetParagraphAlignment(rowParameters.ParagraphAlignment);
+                row.Cells[i].VerticalAlignment = VerticalAlignment.Center;
+            }
+        }
+
+        protected override void CreateTable(List<string> columns)
+        {
+            if (_document == null)
+            {
+                return;
+            }
+            _table = _document.LastSection.AddTable();
+            foreach (var elem in columns)
+            {
+                _table.AddColumn(elem);
+            }
+        }
+
+        protected override MemoryStream SavePDF(PDFInfo info)
+        {
+            
+            var renderer = new PdfDocumentRenderer(true)
+            {
+                Document = _document
+            };            
+            renderer.RenderDocument();
+
+            MemoryStream mem = new MemoryStream();
+            renderer.PdfDocument.Save(mem,false);
+
+            mem.Seek(0, SeekOrigin.Begin);
+            return mem;
+        }
+    }
+}

ComputerStoreBusinessLogic/OfficePackage/Implements/SaveToWord.cs

@@ -0,0 +1,120 @@
+using ComputerStoreBusinessLogic.OfficePackage.HelperEnums;
+using ComputerStoreBusinessLogic.OfficePackage.HelperModels;
+using DocumentFormat.OpenXml;
+using DocumentFormat.OpenXml.Packaging;
+using DocumentFormat.OpenXml.Wordprocessing;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreBusinessLogic.OfficePackage.Implements
+{
+    public class SaveToWord : AbstractSaveToWord
+    {
+        private WordprocessingDocument? _wordDocument;
+        private Body? _docBody;
+        private MemoryStream mem;
+        private static JustificationValues GetJustificationValues(WordJustificationType type)
+        {
+            return type switch
+            {
+                WordJustificationType.Both => JustificationValues.Both,
+                WordJustificationType.Center => JustificationValues.Center,
+                _ => JustificationValues.Left,
+            };
+        }
+
+        private static SectionProperties CreateSectionProperties()
+        {
+            var properties = new SectionProperties();
+            var pageSize = new PageSize
+            {
+                Orient = PageOrientationValues.Portrait
+            };
+            properties.AppendChild(pageSize);
+            return properties;
+        }
+
+        private static ParagraphProperties? CreateParagraphProperties(WordTextProperties? paragraphProperties)
+        {
+            if (paragraphProperties == null)
+            {
+                return null;
+            }
+            var properties = new ParagraphProperties();
+            properties.AppendChild(new Justification()
+            {
+                Val = GetJustificationValues(paragraphProperties.JustificationType)
+            });
+            properties.AppendChild(new SpacingBetweenLines
+            {
+                LineRule = LineSpacingRuleValues.Auto
+            });
+            properties.AppendChild(new Indentation());
+            var paragraphMarkRunProperties = new ParagraphMarkRunProperties();
+            if (!string.IsNullOrEmpty(paragraphProperties.Size))
+            {
+                paragraphMarkRunProperties.AppendChild(new FontSize
+                {
+                    Val = paragraphProperties.Size
+                });
+            }
+            properties.AppendChild(paragraphMarkRunProperties);
+            return properties;
+        }
+
+        protected override void CreateParagraph(WordParagraph paragraph)
+        {
+            if (_docBody == null || paragraph == null)
+            {
+                return;
+            }
+            var docParagraph = new Paragraph();
+
+            docParagraph.AppendChild(CreateParagraphProperties(paragraph.TextProperties));
+            foreach (var run in paragraph.Texts)
+            {
+                var docRun = new Run();
+                var properties = new RunProperties();
+                properties.AppendChild(new FontSize { Val = run.Item2.Size });
+                if (run.Item2.Bold)
+                {
+                    properties.AppendChild(new Bold());
+                }
+                docRun.AppendChild(properties);
+                docRun.AppendChild(new Text
+                {
+                    Text = run.Item1,
+                    Space = SpaceProcessingModeValues.Preserve
+                });
+                docParagraph.AppendChild(docRun);
+            }
+            _docBody.AppendChild(docParagraph);
+        }
+
+        protected override void CreateWord(WordInfo info)
+        {
+            mem = new MemoryStream();
+            _wordDocument = WordprocessingDocument.Create(mem, WordprocessingDocumentType.Document);
+            MainDocumentPart mainPart = _wordDocument.AddMainDocumentPart();
+            mainPart.Document = new Document();
+            _docBody = mainPart.Document.AppendChild(new Body());
+        }
+
+        protected override MemoryStream SaveWord(WordInfo info)
+        {
+            if (_docBody == null || _wordDocument == null)
+            {
+                return null;
+            }
+            _docBody.AppendChild(CreateSectionProperties());
+            _wordDocument.MainDocumentPart!.Document.Save();
+            _wordDocument.Dispose();
+
+            mem.Seek(0, SeekOrigin.Begin);
+            return mem;
+        }
+    }
+}

ComputerStoreBusinessLogic/Properties/launchSettings.json

@@ -0,0 +1,12 @@
+{
+  "profiles": {
+    "ComputerStoreBusinessLogic": {
+      "commandName": "Project",
+      "launchBrowser": true,
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      },
+      "applicationUrl": "https://localhost:50448;http://localhost:50454"
+    }
+  }
+}

ComputerStoreContracts/APIModels/APIProductModel.cs

@@ -0,0 +1,23 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreContracts.ViewModels;
+using ComputerStoreDataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.APIModels
+{
+    public class APIProductModel
+    {
+        public int ID { get; set; }
+        public string Name { get; set; } = string.Empty;
+
+        public double Price { get; set; }
+
+        public int EmployeeID { get; set; }
+
+        public Dictionary<int, (ComponentViewModel Component, int Quantity)> ProductComponents { get; set; } = new();
+    }
+}

ComputerStoreContracts/BindingModels/ComponentBindingModel.cs

@@ -0,0 +1,19 @@
+using ComputerStoreDataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.BindingModels
+{
+    public class ComponentBindingModel : IComponentModel
+    {
+        public int ID { get; set; }
+        public string Name { get; set; } = string.Empty;
+
+        public double Price { get; set; }
+
+
+    }
+}

ComputerStoreContracts/BindingModels/ConsignmentBindingModel.cs

@@ -0,0 +1,17 @@
+using ComputerStoreDataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.BindingModels
+{
+    public class ConsignmentBindingModel : IConsignmentModel
+    {
+        public int ID { get; set; }
+        public int? OrderID { get; set; }
+        public double Price { get; set; }
+        public Dictionary<int, (IProductModel, int)> ConsignmentProducts { get; set; } = new();
+    }
+}

ComputerStoreContracts/BindingModels/EmployeeBindingModel.cs

@@ -0,0 +1,19 @@
+using ComputerStoreDataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.BindingModels
+{
+    public class EmployeeBindingModel : IEmployeeModel
+    {
+        public int ID { get; set; }
+        public string Username { get; set; } = string.Empty;
+        public string Password { get; set; } = string.Empty;
+        public string? FirstName { get; set; } = string.Empty;
+        public string? LastName { get; set; } = string.Empty;
+        public string? MiddleName { get; set; } = string.Empty;
+    }
+}

ComputerStoreContracts/BindingModels/MailConfigBindingModel.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.BindingModels
+{
+    public class MailConfigBindingModel
+    {
+        public string Login { get; set; } = string.Empty;
+        public string Password { get; set; } = string.Empty;
+        public string SmtpClientHost { get; set; } = string.Empty;
+        public int SmtpClientPort { get; set; }
+        public string PopHost { get; set; } = string.Empty;
+        public int PopPort { get; set; }
+    }
+}

ComputerStoreContracts/BindingModels/OrderBindingModel.cs

@@ -0,0 +1,22 @@
+using ComputerStoreDataModels.Enums;
+using ComputerStoreDataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.BindingModels
+{
+    public class OrderBindingModel : IOrderModel
+    {
+        public int ID { get; set; }
+        public double Price { get; set; }
+        public List<IConsignmentModel>? OrderConsignments { get; set; } = new();
+        public List<IRequestModel>? OrderRequests { get; set; } = new();
+        public OrderStatus Status { get; set; } = OrderStatus.Unknown;
+        public DateTime DateCreate { get; set; } = DateTime.Now;
+        public DateTime? DateImplement { get; set; }
+        public int SellerID { get; set; }
+    }
+}

ComputerStoreContracts/BindingModels/PCBindingModel.cs

@@ -0,0 +1,31 @@
+using ComputerStoreDataModels.Models;
+using Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.BindingModels
+{
+    public class PCBindingModel : IPCModel
+    {
+        public int ID {get; set;}
+        public string Name { get; set; } = string.Empty;
+
+        public double Price { get; set; }
+
+        public int EmployeeID { get; set; }
+
+        public int RequestID { get; set; }
+
+        public Dictionary<int, (IComponentModel, int)> PCComponents { get; set; } = new();
+
+        [JsonConstructor]
+        public PCBindingModel(Dictionary<int, (ComponentBindingModel Component, int Quantity)> PCComponents)
+        {
+            this.PCComponents = PCComponents.ToDictionary(x => x.Key, x => (x.Value.Component as IComponentModel, x.Value.Quantity));
+        }
+        public PCBindingModel() { }
+    }
+}

ComputerStoreContracts/BindingModels/ProductBindingModel.cs

@@ -0,0 +1,24 @@
+using ComputerStoreDataModels.Models;
+using Newtonsoft.Json;
+
+namespace ComputerStoreContracts.BindingModels
+{
+    public class ProductBindingModel : IProductModel
+    {
+        public int ID { get; set; }
+        public string Name { get; set; } = string.Empty;
+
+        public double Price { get; set; }
+
+        public int EmployeeID { get; set; }
+       
+        public Dictionary<int, (IComponentModel Component, int Quantity)> ProductComponents { get; set; } = new();
+
+        [JsonConstructor]
+        public ProductBindingModel(Dictionary<int, (ComponentBindingModel Component, int Quantity)> ProductComponents)
+        {
+            this.ProductComponents = ProductComponents.ToDictionary(x => x.Key, x => (x.Value.Component as IComponentModel, x.Value.Quantity));
+        }
+        public ProductBindingModel() { }
+    }
+}

ComputerStoreContracts/BindingModels/ReportComponentsBindingModel.cs

@@ -0,0 +1,15 @@
+using ComputerStoreContracts.SearchModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.BindingModels
+{
+    public class ReportComponentsBindingModel
+    {
+        public string FileName { get; set; } = string.Empty;
+        public List<ComponentSearchModel> Components { get; set; } = new List<ComponentSearchModel>();
+    }
+}

ComputerStoreContracts/BindingModels/ReportDateBindingModel.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.BindingModels
+{
+    public class ReportDateBindingModel
+    {
+        public string FileName { get; set; } = string.Empty;
+        public DateTime? DateFrom { get; set; }
+        public DateTime? DateTo { get; set;}
+        public string? Email { get; set; }
+    }
+}

ComputerStoreContracts/BindingModels/ReportOrderBindingModel.cs

@@ -0,0 +1,15 @@
+using ComputerStoreContracts.SearchModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.BindingModels
+{
+    public class ReportOrderBindingModel
+    {
+        public string FileName { get; set; } = string.Empty;
+        public List<OrderSearchModel> Orders { get; set; } = new();
+    }
+}

ComputerStoreContracts/BindingModels/RequestBindingModel.cs

@@ -0,0 +1,19 @@
+using ComputerStoreDataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.BindingModels
+{
+    public class RequestBindingModel : IRequestModel
+    {
+        public int ID { get; set; }
+        public int? OrderID { get; set; }
+        public double Price { get; set; }
+        public int? PCID { get; set; }
+
+		public List<(IComponentModel, int)> RequestComponents { get; set; } = new();
+	}
+}

ComputerStoreContracts/BindingModels/SellerBindingModel.cs

@@ -0,0 +1,20 @@
+using ComputerStoreDataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.Data;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.BindingModels
+{
+    public class SellerBindingModel : ISellerModel
+    {
+        public int ID { get; set; }
+        public string Username { get; set; } = string.Empty;
+        public string Password { get; set; } = string.Empty;
+        public string? FirstName { get; set; } = string.Empty;
+        public string? LastName { get; set; } = string.Empty;
+        public string? MiddleName { get; set; } = string.Empty;
+    }
+}

ComputerStoreContracts/BusinessLogicContracts/IComponentLogic.cs

@@ -0,0 +1,22 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreContracts.SearchModels;
+using ComputerStoreContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.BusinessLogicContracts
+{
+    public interface IComponentLogic
+    {
+        List<ComponentViewModel>? ReadList(ComponentSearchModel? model);
+
+        ComponentViewModel? ReadElement(ComponentSearchModel model);
+
+        bool Create(ComponentBindingModel model);
+        bool Update(ComponentBindingModel model);
+        bool Delete(ComponentBindingModel model);
+    }
+}

ComputerStoreContracts/BusinessLogicContracts/IConsignmentLogic.cs

@@ -0,0 +1,20 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreContracts.SearchModels;
+using ComputerStoreContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.BusinessLogicContracts
+{
+    public interface IConsignmentLogic
+    {
+        List<ConsignmentViewModel>? ReadList(ConsignmentSearchModel? model);
+        ConsignmentViewModel? ReadElement(ConsignmentSearchModel model);
+        bool Create(ConsignmentBindingModel model);
+        bool Update(ConsignmentBindingModel model);
+        bool Delete(ConsignmentBindingModel model);
+    }
+}

ComputerStoreContracts/BusinessLogicContracts/IEmployeeLogic.cs

@@ -0,0 +1,20 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreContracts.SearchModels;
+using ComputerStoreContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.BusinessLogicContracts
+{
+    public interface IEmployeeLogic
+    {
+        List<EmployeeViewModel>? ReadList(EmployeeSearchModel? model);
+        EmployeeViewModel? ReadElement(EmployeeSearchModel model);
+        bool Create(EmployeeBindingModel model);
+        bool Update(EmployeeBindingModel model);
+        bool Delete(EmployeeBindingModel model);
+    }
+}

ComputerStoreContracts/BusinessLogicContracts/IEmployeeReportLogic.cs

@@ -0,0 +1,21 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.BusinessLogicContracts
+{
+    public interface IEmployeeReportLogic
+    {
+        List<ReportProductByDateViewModel> GetProductsByDate(ReportDateBindingModel model);
+        List<ReportPCByDateViewModel> GetPCsByDate(ReportDateBindingModel model);
+        List<ReportConsignmentsViewModel> GetConsignmentsByComponents(ReportComponentsBindingModel model);
+
+        MemoryStream SavePCsAndProductsToPdfFile(ReportDateBindingModel model);
+        MemoryStream SaveConsignmentsToExcelFile(ReportComponentsBindingModel model);
+        MemoryStream SaveConsignmentsToWordFile(ReportComponentsBindingModel model);
+    }
+}

ComputerStoreContracts/BusinessLogicContracts/IOrderLogic.cs

@@ -0,0 +1,24 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreContracts.SearchModels;
+using ComputerStoreContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.BusinessLogicContracts
+{
+    public interface IOrderLogic
+    {
+        List<OrderViewModel>? ReadList(OrderSearchModel? model);
+        bool CreateOrder(OrderBindingModel model);
+        bool TakeOrderInProcess(OrderBindingModel model);
+        bool TakeOrderReady(OrderBindingModel model);
+        bool TakeOrderGiven(OrderBindingModel model);
+
+		OrderViewModel? ReadElement(OrderSearchModel model);
+		bool UpdateOrder(OrderBindingModel model);
+		bool DeleteOrder(OrderBindingModel model);
+	}
+}

ComputerStoreContracts/BusinessLogicContracts/IPCLogic.cs

@@ -0,0 +1,22 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreContracts.SearchModels;
+using ComputerStoreContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.BusinessLogicContracts
+{
+    public interface IPCLogic
+    {
+        List<PCViewModel>? ReadList(PCSearchModel? model);
+
+        PCViewModel? ReadElement(PCSearchModel model);
+
+        bool Create(PCBindingModel model);
+        bool Update(PCBindingModel model);
+        bool Delete(PCBindingModel model);
+    }
+}

ComputerStoreContracts/BusinessLogicContracts/IProductLogic.cs

@@ -0,0 +1,22 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreContracts.SearchModels;
+using ComputerStoreContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.BusinessLogicContracts
+{
+    public interface IProductLogic
+    {
+        List<ProductViewModel>? ReadList(ProductSearchModel? model);
+
+        ProductViewModel? ReadElement(ProductSearchModel model);
+
+        bool Create(ProductBindingModel model);
+        bool Update(ProductBindingModel model);
+        bool Delete(ProductBindingModel model);
+    }
+}

ComputerStoreContracts/BusinessLogicContracts/IReportOrderLogic.cs

@@ -0,0 +1,19 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.BusinessLogicContracts
+{
+    public interface IReportOrderLogic
+    {
+        ReportOrderViewModel GetPCsByOrders(ReportOrderBindingModel model);
+        ReportOrderByDateViewModel GetOrdersByDate(ReportDateBindingModel model);
+        void SaveOrdersToWordFile(ReportOrderBindingModel model);
+        void SaveOrdersToExcelFile(ReportOrderBindingModel model);
+        void SaveOrdersToPdfFile(ReportDateBindingModel model);
+    }
+}

ComputerStoreContracts/BusinessLogicContracts/IRequestComponentLogic.cs

@@ -0,0 +1,17 @@
+using ComputerStoreContracts.SearchModels;
+using ComputerStoreContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.BusinessLogicContracts
+{
+    public interface IRequestComponentLogic
+    {
+        List<RequestComponentViewModel>? ReadList(RequestSearchModel? model);
+
+
+    }
+}

ComputerStoreContracts/BusinessLogicContracts/IRequestLogic.cs

@@ -0,0 +1,20 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreContracts.SearchModels;
+using ComputerStoreContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.BusinessLogicContracts
+{
+    public interface IRequestLogic
+    {
+        List<RequestViewModel>? ReadList(RequestSearchModel? model);
+        RequestViewModel? ReadElement(RequestSearchModel model);
+        bool Create(RequestBindingModel model);
+        bool Update(RequestBindingModel model);
+        bool Delete(RequestBindingModel model);
+    }
+}

ComputerStoreContracts/BusinessLogicContracts/ISellerLogic.cs

@@ -0,0 +1,20 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreContracts.SearchModels;
+using ComputerStoreContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.BusinessLogicContracts
+{
+    public interface ISellerLogic
+    {
+        List<SellerViewModel>? ReadList(SellerSearchModel? model);
+        SellerViewModel? ReadElement(SellerSearchModel model);
+        bool Create(SellerBindingModel model);
+        bool Update(SellerBindingModel model);
+        bool Delete(SellerBindingModel model);
+    }
+}

ComputerStoreContracts/ComputerStoreContracts.csproj

@@ -0,0 +1,17 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\ComputerStoreDataModels\ComputerStoreDataModels.csproj" />
+  </ItemGroup>
+
+</Project>

ComputerStoreContracts/Properties/launchSettings.json

@@ -0,0 +1,12 @@
+{
+  "profiles": {
+    "ComputerStoreContracts": {
+      "commandName": "Project",
+      "launchBrowser": true,
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      },
+      "applicationUrl": "https://localhost:50450;http://localhost:50453"
+    }
+  }
+}

ComputerStoreContracts/SearchModels/ComponentSearchModel.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.SearchModels
+{
+    public class ComponentSearchModel
+    {
+        public int? ID { get; set; }
+        public string? Name { get; set; }  
+    }
+}

ComputerStoreContracts/SearchModels/ConsignmentSearchModel.cs

@@ -0,0 +1,16 @@
+using ComputerStoreDataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.SearchModels
+{
+    public class ConsignmentSearchModel
+    {
+        public int? ID { get; set; }
+        public int? OrderID { get; set; }
+        public int? ProductID { get; set; }
+    }
+}

ComputerStoreContracts/SearchModels/EmployeeSearchModel.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.SearchModels
+{
+    public class EmployeeSearchModel
+    {
+        public int? ID { get; set; }
+        public string? Username { get; set; }
+        public string? Password { get; set; }
+    }
+}

ComputerStoreContracts/SearchModels/OrderSearchModel.cs

@@ -0,0 +1,19 @@
+using ComputerStoreDataModels.Enums;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.SearchModels
+{
+    public class OrderSearchModel
+    {
+        public int? ID { get; set; }
+        public int? ConsignmentID { get; set; }
+        public int? RequestID { get; set; }
+        public DateTime? DateFrom { get; set; }
+        public DateTime? DateTo { get; set; }
+        public int? SellerID { get; set; }
+    }
+}

ComputerStoreContracts/SearchModels/PCSearchModel.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.SearchModels
+{
+    public class PCSearchModel
+    {
+        public int? ID { get; set; }
+        public string? Name { get; set; }
+        public int? RequestID { get; set; }
+        public int? EmployeeID { get; set; } 
+        public DateTime? DateFrom { get; set; }
+        public DateTime? DateTo { get; set;}
+    }
+}

ComputerStoreContracts/SearchModels/ProductSearchModel.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.SearchModels
+{
+    public class ProductSearchModel
+    {
+        public int? ID { get; set; }
+        public string? Name { get; set; }
+        public int? EmployeeID { get; set; }
+        public int? ComponentID { get; set; }
+        public DateTime? DateTo { get; set; }
+        public DateTime? DateFrom { get; set; } 
+    }
+}

ComputerStoreContracts/SearchModels/RequestSearchModel.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.SearchModels
+{
+    public class RequestSearchModel
+    {
+        public int? ID { get; set; }
+        public int? OrderID { get; set; }
+        public int? PCID { get; set; }
+    }
+}

ComputerStoreContracts/SearchModels/SellerSearchModel.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.SearchModels
+{
+    public class SellerSearchModel
+    {
+        public int? ID { get; set; }
+        public string? Username { get; set; }
+        public string? Password { get; set; }
+    }
+}

ComputerStoreContracts/StorageContracts/IComponentStorage.cs

@@ -0,0 +1,21 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreContracts.SearchModels;
+using ComputerStoreContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.StorageContracts
+{
+    public interface IComponentStorage
+    {
+        List<ComponentViewModel> GetFullList();
+        List<ComponentViewModel> GetFilteredList(ComponentSearchModel model);
+        ComponentViewModel? GetElement(ComponentSearchModel model);
+        ComponentViewModel? Insert(ComponentBindingModel model);
+        ComponentViewModel? Update(ComponentBindingModel model);
+        ComponentViewModel? Delete(ComponentBindingModel model);
+    }
+}

ComputerStoreContracts/StorageContracts/IConsignmentStorage.cs

@@ -0,0 +1,21 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreContracts.SearchModels;
+using ComputerStoreContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.StorageContracts
+{
+    public interface IConsignmentStorage
+    {
+        List<ConsignmentViewModel> GetFullList();
+        List<ConsignmentViewModel> GetFilteredList(ConsignmentSearchModel model);
+        ConsignmentViewModel? GetElement(ConsignmentSearchModel model);
+        ConsignmentViewModel? Insert(ConsignmentBindingModel model);
+        ConsignmentViewModel? Update(ConsignmentBindingModel model);
+        ConsignmentViewModel? Delete(ConsignmentBindingModel model);
+    }
+}

ComputerStoreContracts/StorageContracts/IEmployeeStorage.cs

@@ -0,0 +1,21 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreContracts.SearchModels;
+using ComputerStoreContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.StorageContracts
+{
+    public interface IEmployeeStorage
+    {
+        List<EmployeeViewModel> GetFullList();
+        List<EmployeeViewModel> GetFilteredList(EmployeeSearchModel model);
+        EmployeeViewModel? GetElement(EmployeeSearchModel model);
+        EmployeeViewModel? Insert(EmployeeBindingModel model);
+        EmployeeViewModel? Update(EmployeeBindingModel model);
+        EmployeeViewModel? Delete(EmployeeBindingModel model);
+    }
+}

ComputerStoreContracts/StorageContracts/IOrderStorage.cs

@@ -0,0 +1,21 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreContracts.SearchModels;
+using ComputerStoreContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.StorageContracts
+{
+    public interface IOrderStorage
+    {
+        List<OrderViewModel> GetFullList();
+        List<OrderViewModel> GetFilteredList(OrderSearchModel model);
+        OrderViewModel? GetElement(OrderSearchModel model);
+        OrderViewModel? Insert(OrderBindingModel model);
+        OrderViewModel? Update(OrderBindingModel model);
+        OrderViewModel? Delete(OrderBindingModel model);
+    }
+}

ComputerStoreContracts/StorageContracts/IPCStorage.cs

@@ -0,0 +1,21 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreContracts.SearchModels;
+using ComputerStoreContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.StorageContracts
+{
+    public interface IPCStorage
+    {
+        List<PCViewModel> GetFullList();
+        List<PCViewModel> GetFilteredList(PCSearchModel model);
+        PCViewModel? GetElement(PCSearchModel model);
+        PCViewModel? Insert(PCBindingModel model);
+        PCViewModel? Update(PCBindingModel model);
+        PCViewModel? Delete(PCBindingModel model);
+    }
+}

ComputerStoreContracts/StorageContracts/IProductStorage.cs

@@ -0,0 +1,21 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreContracts.SearchModels;
+using ComputerStoreContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.StorageContracts
+{
+    public interface IProductStorage
+    {
+        List<ProductViewModel> GetFullList();
+        List<ProductViewModel> GetFilteredList(ProductSearchModel model);
+        ProductViewModel? GetElement(ProductSearchModel model);
+        ProductViewModel? Insert(ProductBindingModel model);
+        ProductViewModel? Update(ProductBindingModel model);
+        ProductViewModel? Delete(ProductBindingModel model);
+    }
+}

ComputerStoreContracts/StorageContracts/IRequestComponentStorage.cs

@@ -0,0 +1,16 @@
+using ComputerStoreContracts.SearchModels;
+using ComputerStoreContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.StorageContracts
+{
+    public interface IRequestComponentStorage
+    {
+        List<RequestComponentViewModel> GetFullList();
+        List<RequestComponentViewModel> GetFilteredList(RequestSearchModel model);
+    }
+}

ComputerStoreContracts/StorageContracts/IRequestStorage.cs

@@ -0,0 +1,21 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreContracts.SearchModels;
+using ComputerStoreContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.StorageContracts
+{
+    public interface IRequestStorage
+    {
+        List<RequestViewModel> GetFullList();
+        List<RequestViewModel> GetFilteredList(RequestSearchModel model);
+        RequestViewModel? GetElement(RequestSearchModel model);
+        RequestViewModel? Insert(RequestBindingModel model);
+        RequestViewModel? Update(RequestBindingModel model);
+        RequestViewModel? Delete(RequestBindingModel model);
+    }
+}

ComputerStoreContracts/StorageContracts/ISellerStorage.cs

@@ -0,0 +1,21 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreContracts.SearchModels;
+using ComputerStoreContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.StorageContracts
+{
+    public interface ISellerStorage
+    {
+        List<SellerViewModel> GetFullList();
+        List<SellerViewModel> GetFilteredList(SellerSearchModel model);
+        SellerViewModel? GetElement(SellerSearchModel model);
+        SellerViewModel? Insert(SellerBindingModel model);
+        SellerViewModel? Update(SellerBindingModel model);
+        SellerViewModel? Delete(SellerBindingModel model);
+    }
+}

ComputerStoreContracts/ViewModels/ComponentViewModel.cs

@@ -0,0 +1,23 @@
+using ComputerStoreDataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.ViewModels
+{
+    public class ComponentViewModel : IComponentModel
+    {
+        public int ID {get; set;}
+
+        [DisplayName("Component's name")]
+        public string Name { get; set; } = string.Empty;
+
+        [DisplayName("Component's price")]
+        public double Price { get; set; }
+
+        
+    }
+}

ComputerStoreContracts/ViewModels/ConsignmentViewModel.cs

@@ -0,0 +1,22 @@
+using ComputerStoreDataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.ViewModels
+{
+    public class ConsignmentViewModel : IConsignmentModel
+    {
+        [DisplayName("Consignment ID")]
+        public int ID { get; set; }
+        [DisplayName("Order ID")]
+        public int? OrderID { get; set; }
+        [DisplayName("Price")]
+        public double Price { get; set; }
+
+        public Dictionary<int, (IProductModel, int)> ConsignmentProducts { get; set; } = new();
+    }
+}

ComputerStoreContracts/ViewModels/EmployeeViewModel.cs

@@ -0,0 +1,31 @@
+using ComputerStoreDataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.ViewModels
+{
+    public class EmployeeViewModel : IEmployeeModel
+    {
+        public int ID { get; set; }
+
+        [DisplayName("Employee's login")]
+        public string Username { get; set; } = string.Empty;
+
+        public string Password { get; set; } = string.Empty;
+
+        [DisplayName("Employee's first name")]
+        public string? FirstName { get; set; } = string.Empty;
+
+        [DisplayName("Employee's last name")]
+        public string? LastName { get; set; } = string.Empty;
+
+        [DisplayName("Employee's middle name")]
+        public string? MiddleName { get; set; } = string.Empty;
+
+
+    }
+}

ComputerStoreContracts/ViewModels/OrderViewModel.cs

@@ -0,0 +1,32 @@
+using ComputerStoreDataModels.Enums;
+using ComputerStoreDataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.ViewModels
+{
+    public class OrderViewModel : IOrderModel
+    {
+        [DisplayName("Order ID")]
+        public int ID { get; set; }
+        [DisplayName("Price")]
+        public double Price { get; set; }
+        [DisplayName("Status")]
+        public OrderStatus Status { get; set; }
+        [DisplayName("Creation date")]
+        public DateTime DateCreate { get; set; }
+        [DisplayName("Implementation date")]
+        public DateTime? DateImplement { get; set; }
+
+        public int SellerID { get; set; }
+        [DisplayName("SellerUsername")]
+        public string? SellerUsername { get; set; } = string.Empty;
+
+        public List<IConsignmentModel>? OrderConsignments { get; set; } = new();
+        public List<IRequestModel>? OrderRequests { get; set; } = new();
+    }
+}

ComputerStoreContracts/ViewModels/PCViewModel.cs

@@ -0,0 +1,39 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreDataModels.Models;
+using Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.ViewModels
+{
+    public class PCViewModel : IPCModel
+    {
+        public int ID { get; set; }
+
+        [DisplayName("PC's name")]
+        public string Name { get; set; } = string.Empty;
+
+        [DisplayName("PC's price")]
+        public double Price { get; set; }
+
+        public int EmployeeID { get; set; }
+
+        [DisplayName("Employee's username")]
+        public string EmployeeUsername { get; set; } = string.Empty;
+
+        [DisplayName("Request ID")]
+        public int RequestID { get; set; }
+        public Dictionary<int, (IComponentModel Component, int Quantity)> PCComponents { get; set; } = new();
+
+        [JsonConstructor]
+        public PCViewModel(Dictionary<int, (ComponentBindingModel Component, int Quantity)> PCComponents)
+        {
+            this.PCComponents = PCComponents.ToDictionary(x => x.Key, x => (x.Value.Component as IComponentModel, x.Value.Quantity));
+        }
+        public PCViewModel() { }
+    }
+}

ComputerStoreContracts/ViewModels/ProductViewModel.cs

@@ -0,0 +1,38 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreDataModels.Models;
+using Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Security.Cryptography.X509Certificates;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.ViewModels
+{
+    public class ProductViewModel : IProductModel
+    {
+        public int ID {get; set;}
+
+        [DisplayName("Product's name")]
+        public string Name { get; set; } = string.Empty;
+
+        [DisplayName("Product's price")]
+        public double Price { get; set; }
+
+        public int EmployeeID { get; set; }
+
+        [DisplayName("Employee's username")]
+        public string EmployeeUsername { get; set; } = string.Empty;
+
+        public Dictionary<int, (IComponentModel Component, int Quantity)> ProductComponents { get; set; } = new();
+
+        [JsonConstructor]
+        public ProductViewModel(Dictionary<int, (ComponentBindingModel Component, int Quantity)> ProductComponents)
+        {
+            this.ProductComponents = ProductComponents.ToDictionary(x => x.Key, x => (x.Value.Component as IComponentModel, x.Value.Quantity));
+        }
+        public ProductViewModel() { }
+    }
+}

ComputerStoreContracts/ViewModels/ReportConsignmentsViewModel.cs

@@ -0,0 +1,15 @@
+using ComputerStoreDataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.ViewModels
+{
+    public class ReportConsignmentsViewModel
+    {
+        public int ID { get; set; }
+        public List<(string product, int count)> Products { get; set; } = new List<(string, int)>();
+    }
+}

ComputerStoreContracts/ViewModels/ReportOrderByDateViewModel.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.ViewModels
+{
+    public class ReportOrderByDateViewModel
+    {
+        public Dictionary<int, (List<ConsignmentViewModel>, List<RequestViewModel>)> OrderConsignmentsAndRequests { get; set; } = new();
+    }
+}

ComputerStoreContracts/ViewModels/ReportOrderViewModel.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.ViewModels
+{
+    public class ReportOrderViewModel
+    {
+        public Dictionary<int, (List<RequestViewModel>, List<PCViewModel>)> OrderPCs { get; set; } = new();
+    }
+}

ComputerStoreContracts/ViewModels/ReportPCByDateViewModel.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.ViewModels
+{
+    public class ReportPCByDateViewModel
+    {
+        public string PCName { get; set; } = string.Empty;
+        public double Price { get; set; }
+        public List<(string Component, int count)> Components { get; set; } = new List<(string Component, int count)> ();
+
+        public string EmployeeUsername { get; set; } = string.Empty;
+    }
+}

ComputerStoreContracts/ViewModels/ReportProductByDateViewModel.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Security.Cryptography.X509Certificates;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.ViewModels
+{
+    public class ReportProductByDateViewModel
+    {
+        public string ProductName { get; set; } = string.Empty;
+        public double Price { get; set; }
+        public List<(string Component, int count)> Components { get; set; } = new List<(string Component, int count)>();
+        public string EmployeeUsername { get; set; } = string.Empty;
+    }
+}

ComputerStoreContracts/ViewModels/RequestComponentViewModel.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.ViewModels
+{
+    public class RequestComponentViewModel
+    {
+        [DisplayName("RequestID")]
+        public int RequestID { get; set; }
+
+        [DisplayName("ComponentID")]
+        public int ComponentID { get; set; }
+
+        [DisplayName("Component's name")]
+        public string ComponentName { get; set; } = string.Empty;
+
+        [DisplayName("Component's count")]
+        public int ComponentCount { get; set; } 
+
+        [DisplayName("PCID")]
+        public int PCID { get; set; }
+        
+    }
+}

ComputerStoreContracts/ViewModels/RequestViewModel.cs

@@ -0,0 +1,28 @@
+using ComputerStoreDataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.ViewModels
+{
+    public class RequestViewModel : IRequestModel
+    {
+        [DisplayName("Request ID")]
+        public int ID { get; set; }
+        [DisplayName("Order ID")]
+        public int? OrderID { get; set; }
+        [DisplayName("Price")]
+        public double Price { get; set; }
+
+        [DisplayName("PC ID")]
+        public int? PCID { get; set; }
+
+        [DisplayName("PC's name")]
+        public string? PCName { get; set; } = string.Empty;
+
+		public List<(IComponentModel, int)> RequestComponents { get; set; } = new();
+	}
+}

ComputerStoreContracts/ViewModels/SellerViewModel.cs

@@ -0,0 +1,26 @@
+using ComputerStoreDataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.ViewModels
+{
+    public class SellerViewModel : ISellerModel
+    {
+        [DisplayName("Seller ID")]
+        public int ID { get; set; }
+        [DisplayName("Username")]
+        public string Username { get; set; } = string.Empty;
+
+        public string Password { get; set; } = string.Empty;
+        [DisplayName("FirstName")]
+        public string? FirstName { get; set; } = string.Empty;
+        [DisplayName("LastName")]
+        public string? LastName { get; set; } = string.Empty;
+        [DisplayName("MiddleName")]
+        public string? MiddleName { get; set; } = string.Empty;
+    }
+}

ComputerStoreDataModels/ComputerStoreDataModels.csproj

@@ -1,9 +1,9 @@
-<Project Sdk="Microsoft.NET.Sdk.Web">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFramework>net6.0</TargetFramework>
-    <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
   </PropertyGroup>
 
 </Project>

ComputerStoreDataModels/Enums/OrderStatus.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreDataModels.Enums
+{
+    public enum OrderStatus
+    {
+        Unknown = -1,
+        Accepted = 0,
+        InProcess = 1,
+        Ready = 2,
+        Given = 3
+    }
+}

ComputerStoreDataModels/IID.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreDataModels
+{
+    public interface IID
+    {
+        int ID { get; }
+    }
+}

ComputerStoreDataModels/Models/IComponentModel.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using System.Text;
+using System.Text.Json.Serialization;
+using System.Threading.Tasks;
+
+namespace ComputerStoreDataModels.Models
+{
+    public interface IComponentModel : IID
+    {
+        [MaxLength(255)]
+        string Name { get;}
+        double Price { get;}
+    }
+}