Readme

Но ещё требуется ревью и чистка

.vscode/launch.json

@@ -2,50 +2,33 @@
   "version": "0.2.0",
   "configurations": [
     {
-            // Use IntelliSense to find out which attributes exist for C# debugging
+      "name": "ApiServer",
-            // Use hover for the description of the existing attributes
-            // For further information visit https://github.com/dotnet/vscode-csharp/blob/main/debugger-launchjson.md
-            "name": ".NET Core Launch (console)",
       "type": "coreclr",
       "request": "launch",
-            "preLaunchTask": "build",
+      "preLaunchTask": "build ApiServer",
-            // If you have changed target frameworks, make sure to update the program path.
-            "program": "${workspaceFolder}/src/Console/bin/Debug/net10.0/Console.dll",
-            "args": [],
-            "cwd": "${workspaceFolder}/src/Console",
-            // For more information about the 'console' field, see https://aka.ms/VSCode-CS-LaunchJson-Console
-            "console": "internalConsole",
-            "stopAtEntry": false
-        },
-        {
-            "name": ".NET Core Attach",
-            "type": "coreclr",
-            "request": "attach"
-        },
-        {
-            // Use IntelliSense to find out which attributes exist for C# debugging
-            // Use hover for the description of the existing attributes
-            // For further information visit https://github.com/dotnet/vscode-csharp/blob/main/debugger-launchjson.md.
-            "name": ".NET Core Launch (web)",
-            "type": "coreclr",
-            "request": "launch",
-            "preLaunchTask": "build",
-            // If you have changed target frameworks, make sure to update the program path.
       "program": "${workspaceFolder}/src/ApiServer/bin/Debug/net10.0/ApiServer.dll",
       "args": [],
       "cwd": "${workspaceFolder}/src/ApiServer",
       "stopAtEntry": false,
-            // Enable launching a web browser when ASP.NET Core starts. For more information: https://aka.ms/VSCode-CS-LaunchJson-WebBrowser
-            "serverReadyAction": {
-                "action": "openExternally",
-                "pattern": "\\bNow listening on:\\s+(https?://\\S+)"
-            },
       "env": {
         "ASPNETCORE_ENVIRONMENT": "Development"
-            },
-            "sourceFileMap": {
-                "/Views": "${workspaceFolder}/Views"
       }
+    },
+    {
+      "name": "Console",
+      "type": "coreclr",
+      "request": "launch",
+      "preLaunchTask": "build Console",
+      "program": "dotnet",
+      "args": [
+        "run",
+        "--no-build",
+        "--project",
+        "${workspaceFolder}/src/Console/Console.csproj"
+      ],
+      "cwd": "${workspaceFolder}",
+      "console": "integratedTerminal",
+      "stopAtEntry": false
     }
   ]
 }

.vscode/tasks.json

@@ -2,39 +2,17 @@
   "version": "2.0.0",
   "tasks": [
     {
-            "label": "build",
+      "label": "build ApiServer",
-            "command": "dotnet",
+      "type": "shell",
-            "type": "process",
+      "command": "dotnet build ${workspaceFolder}/src/ApiServer/ApiServer.csproj",
-            "args": [
+      "group": "build",
-                "build",
-                "${workspaceFolder}/src/ApiServer/ApiServer.csproj",
-                "/property:GenerateFullPaths=true",
-                "/consoleloggerparameters:NoSummary;ForceNoAlign"
-            ],
       "problemMatcher": "$msCompile"
     },
     {
-            "label": "publish",
+      "label": "build Console",
-            "command": "dotnet",
+      "type": "shell",
-            "type": "process",
+      "command": "dotnet build ${workspaceFolder}/src/Console/Console.csproj",
-            "args": [
+      "group": "build",
-                "publish",
-                "${workspaceFolder}/src/ApiServer/ApiServer.csproj",
-                "/property:GenerateFullPaths=true",
-                "/consoleloggerparameters:NoSummary;ForceNoAlign"
-            ],
-            "problemMatcher": "$msCompile"
-        },
-        {
-            "label": "watch",
-            "command": "dotnet",
-            "type": "process",
-            "args": [
-                "watch",
-                "run",
-                "--project",
-                "${workspaceFolder}/src/ApiServer/ApiServer.csproj"
-            ],
       "problemMatcher": "$msCompile"
     }
   ]

README.md

@@ -0,0 +1,73 @@
+# SMS Task One
+
+Тестовое задание SMS (Middle C#): REST/gRPC API сервера и консольное приложение с PostgreSQL.
+
+## Требования
+
+- [.NET 10 SDK](https://dotnet.microsoft.com/download)
+- Docker (для PostgreSQL) или свой экземпляр Postgres 16+
+
+## Структура
+
+| Проект | Назначение |
+|--------|------------|
+| `Domain` | Доменные модели |
+| `Contracts` | DTO, JSON, gRPC proto |
+| `ApiServer` | ASP.NET Core: HTTP API + gRPC |
+| `ApiClient` | HTTP и gRPC клиенты |
+| `Console` | Консоль (часть 3 ТЗ): меню, заказ, БД |
+
+## Сборка
+
+```bash
+dotnet build
+```
+
+## База данных
+
+Запуск Postgres в Docker (сброс данных):
+
+```bash
+./scripts/restart-db.sh
+```
+
+Параметры: `localhost:5432`, БД `sms_task`, пользователь/поль `sms` / `sms`.
+
+Подключение через `psql`:
+
+```bash
+psql -h localhost -p 5432 -U sms -d sms_task
+```
+
+Пароль: `sms`. Вариант с URI:
+
+```bash
+psql "postgresql://sms:sms@localhost:5432/sms_task"
+```
+
+## ApiServer
+
+```bash
+dotnet run --project src/ApiServer/ApiServer.csproj
+```
+
+| Сервис | URL |
+|--------|-----|
+| HTTP API | http://localhost:5053 |
+| gRPC | http://localhost:5054 |
+
+Basic Auth (HTTP): `user` / `password` (см. `src/ApiServer/appsettings.json`).
+
+Примеры запросов: `src/ApiServer/ApiServer.http`.
+
+## Console
+
+Сначала запустите ApiServer и БД.
+
+```bash
+dotnet run --project src/Console/Console.csproj
+```
+
+При старте выбирается протокол: `1` — HTTP, `2` — gRPC. Настройки — в `src/Console/appsettings.json`. Лог пишется в файл `test-sms-console-app-*.log` в каталоге запуска; путь выводится в конце работы.
+
+Формат ввода заказа: `Артикул:Количество;Артикул:Количество` (например `A1004292:1`).

scripts/restart-db.sh

@@ -0,0 +1,40 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+CONTAINER_NAME="sms-postgres"
+VOLUME_NAME="sms-postgres-data"
+IMAGE="postgres:16"
+PORT="5432"
+POSTGRES_USER="sms"
+POSTGRES_PASSWORD="sms"
+POSTGRES_DB="sms_task"
+
+if ! command -v docker >/dev/null 2>&1; then
+  echo "docker не найден. Установите Docker и повторите." >&2
+  exit 1
+fi
+
+echo "Останавливаю и удаляю контейнер ${CONTAINER_NAME}..."
+docker rm -f "${CONTAINER_NAME}" >/dev/null 2>&1 || true
+
+echo "Удаляю том ${VOLUME_NAME}..."
+docker volume rm "${VOLUME_NAME}" >/dev/null 2>&1 || true
+
+echo "Запускаю PostgreSQL (${IMAGE})..."
+docker run -d \
+  --name "${CONTAINER_NAME}" \
+  -e POSTGRES_USER="${POSTGRES_USER}" \
+  -e POSTGRES_PASSWORD="${POSTGRES_PASSWORD}" \
+  -e POSTGRES_DB="${POSTGRES_DB}" \
+  -p "${PORT}:5432" \
+  -v "${VOLUME_NAME}:/var/lib/postgresql/data" \
+  "${IMAGE}" >/dev/null
+
+echo "Готово."
+echo "  Host:     localhost:${PORT}"
+echo "  Database: ${POSTGRES_DB}"
+echo "  User:     ${POSTGRES_USER}"
+echo "  Password: ${POSTGRES_PASSWORD}"
+echo ""
+echo "Connection string:"
+echo "  Host=localhost;Port=${PORT};Database=${POSTGRES_DB};Username=${POSTGRES_USER};Password=${POSTGRES_PASSWORD}"

src/ApiClient/Class1.cs

@@ -1,6 +0,0 @@
-namespace ApiClient;
-
-public class Class1
-{
-
-}

src/ApiClient/Grpc/GrpcSmsClient.cs

@@ -0,0 +1,81 @@
+using Contracts;
+using Contracts.Menu;
+using Contracts.Responses;
+using Domain.Entities;
+using Google.Protobuf.WellKnownTypes;
+using Grpc.Net.Client;
+using Sms.Test;
+
+namespace ApiClient.Grpc;
+
+public sealed class GrpcSmsClient : ISmsClient, IDisposable
+{
+    private readonly GrpcChannel _channel;
+    private readonly SmsTestService.SmsTestServiceClient _client;
+
+    public GrpcSmsClient(GrpcSmsClientOptions options)
+    {
+        var address = options.Address;
+        var channelOptions = new GrpcChannelOptions();
+
+        if (address.StartsWith("http://", StringComparison.OrdinalIgnoreCase))
+        {
+            AppContext.SetSwitch("System.Net.Http.SocketsHttpHandler.Http2UnencryptedSupport", true);
+            channelOptions.HttpHandler = new SocketsHttpHandler
+            {
+                EnableMultipleHttp2Connections = true,
+            };
+        }
+
+        _channel = GrpcChannel.ForAddress(address, channelOptions);
+        _client = new SmsTestService.SmsTestServiceClient(_channel);
+    }
+
+    public async Task<GetMenuApiResponse> GetMenuAsync(bool withPrice = true, CancellationToken cancellationToken = default)
+    {
+        var response = await _client.GetMenuAsync(new BoolValue { Value = withPrice }, cancellationToken: cancellationToken);
+
+        return new GetMenuApiResponse
+        {
+            Command = Commands.GetMenu,
+            Success = response.Success,
+            ErrorMessage = response.ErrorMessage,
+            Data = response.Success
+                ? new GetMenuData { MenuItems = response.MenuItems.Select(ToDish).ToList() }
+                : null,
+        };
+    }
+
+    public async Task<SendOrderApiResponse> SendOrderAsync(Domain.Entities.Order order, CancellationToken cancellationToken = default)
+    {
+        var grpcOrder = new Sms.Test.Order { Id = order.Id.ToString() };
+        grpcOrder.OrderItems.AddRange(order.Items.Select(item => new Sms.Test.OrderItem
+        {
+            Id = item.Id,
+            Quantity = (double)item.Quantity,
+        }));
+
+        var response = await _client.SendOrderAsync(grpcOrder, cancellationToken: cancellationToken);
+
+        return new SendOrderApiResponse
+        {
+            Command = Commands.SendOrder,
+            Success = response.Success,
+            ErrorMessage = response.ErrorMessage,
+        };
+    }
+
+    public void Dispose()
+    {
+        _channel.Dispose();
+    }
+
+    private static Dish ToDish(MenuItem item) => new(
+        item.Id,
+        item.Article,
+        item.Name,
+        (decimal)item.Price,
+        item.IsWeighted,
+        item.FullPath,
+        item.Barcodes.ToList());
+}

src/ApiClient/Grpc/GrpcSmsClientOptions.cs

@@ -0,0 +1,6 @@
+namespace ApiClient.Grpc;
+
+public sealed class GrpcSmsClientOptions
+{
+    public string Address { get; set; } = "http://localhost:5054";
+}

src/ApiClient/Http/HttpSmsClient.cs

@@ -0,0 +1,112 @@
+using System.Net;
+using System.Net.Http.Headers;
+using System.Text;
+using System.Text.Json;
+using Contracts;
+using Contracts.Menu;
+using Contracts.Orders;
+using Contracts.Requests;
+using Contracts.Responses;
+using Domain.Entities;
+
+namespace ApiClient.Http;
+
+public sealed class HttpSmsClient : ISmsClient, IDisposable
+{
+    private readonly HttpClient _httpClient;
+
+    public HttpSmsClient(HttpSmsClientOptions options)
+    {
+        _httpClient = new HttpClient { BaseAddress = new Uri(options.BaseUrl) };
+
+        var credentials = Convert.ToBase64String(Encoding.UTF8.GetBytes($"{options.Username}:{options.Password}"));
+        _httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", credentials);
+    }
+
+    public async Task<GetMenuApiResponse> GetMenuAsync(bool withPrice = true, CancellationToken cancellationToken = default)
+    {
+        var request = new GetMenuApiRequest
+        {
+            CommandParameters = new GetMenuParameters(withPrice),
+        };
+
+        var response = await SendAsync(request, cancellationToken);
+        return ToGetMenuResponse(response);
+    }
+
+    public async Task<SendOrderApiResponse> SendOrderAsync(Order order, CancellationToken cancellationToken = default)
+    {
+        var request = new SendOrderApiRequest
+        {
+            CommandParameters = new SendOrderParameters
+            {
+                OrderId = order.Id.ToString(),
+                MenuItems = order.Items.ToList(),
+            },
+        };
+
+        var response = await SendAsync(request, cancellationToken);
+        return ToSendOrderResponse(response);
+    }
+
+    public void Dispose() => _httpClient.Dispose();
+
+    private async Task<ApiResponse> SendAsync(ApiRequest request, CancellationToken cancellationToken)
+    {
+        var json = JsonSerializer.Serialize(request, request.GetType(), ApiJsonOptions.Instance);
+        using var content = new StringContent(json, Encoding.UTF8, "application/json");
+        using var httpResponse = await _httpClient.PostAsync("/", content, cancellationToken);
+
+        if (httpResponse.StatusCode == HttpStatusCode.Unauthorized)
+        {
+            return new ApiResponse
+            {
+                Command = request.Command,
+                Success = false,
+                ErrorMessage = "Требуется аутентификация.",
+            };
+        }
+
+        var responseJson = await httpResponse.Content.ReadAsStringAsync(cancellationToken);
+
+        if (string.IsNullOrWhiteSpace(responseJson))
+        {
+            return new ApiResponse
+            {
+                Command = request.Command,
+                Success = false,
+                ErrorMessage = $"Пустой ответ сервера (HTTP {(int)httpResponse.StatusCode}).",
+            };
+        }
+
+        try
+        {
+            return ApiResponseDeserializer.Deserialize(responseJson);
+        }
+        catch (JsonException)
+        {
+            return new ApiResponse
+            {
+                Command = request.Command,
+                Success = false,
+                ErrorMessage = $"Некорректный JSON в ответе (HTTP {(int)httpResponse.StatusCode}): {responseJson}",
+            };
+        }
+    }
+
+    private static GetMenuApiResponse ToGetMenuResponse(ApiResponse response) =>
+        response as GetMenuApiResponse ?? new GetMenuApiResponse
+        {
+            Command = Commands.GetMenu,
+            Success = false,
+            ErrorMessage = response.ErrorMessage,
+        };
+
+    private static SendOrderApiResponse ToSendOrderResponse(ApiResponse response) =>
+        response as SendOrderApiResponse ?? new SendOrderApiResponse
+        {
+            Command = Commands.SendOrder,
+            Success = false,
+            ErrorMessage = response.ErrorMessage,
+        };
+}

src/ApiClient/Http/HttpSmsClientOptions.cs

@@ -0,0 +1,10 @@
+namespace ApiClient.Http;
+
+public sealed class HttpSmsClientOptions
+{
+    public string BaseUrl { get; set; } = "http://localhost:5053";
+
+    public string Username { get; set; } = "user";
+
+    public string Password { get; set; } = "password";
+}

src/ApiClient/ISmsClient.cs

@@ -0,0 +1,11 @@
+using Contracts.Responses;
+using Domain.Entities;
+
+namespace ApiClient;
+
+public interface ISmsClient
+{
+    Task<GetMenuApiResponse> GetMenuAsync(bool withPrice = true, CancellationToken cancellationToken = default);
+
+    Task<SendOrderApiResponse> SendOrderAsync(Order order, CancellationToken cancellationToken = default);
+}

src/ApiClient/SmsClientFactory.cs

@@ -0,0 +1,11 @@
+using ApiClient.Grpc;
+using ApiClient.Http;
+
+namespace ApiClient;
+
+public static class SmsClientFactory
+{
+    public static HttpSmsClient CreateHttp(HttpSmsClientOptions options) => new(options);
+
+    public static GrpcSmsClient CreateGrpc(GrpcSmsClientOptions options) => new(options);
+}

src/ApiServer/Controllers/ApiController.cs

@@ -31,6 +31,15 @@ public sealed class ApiController(ISmsApiService apiService) : ControllerBase
                 ErrorMessage = $"Некорректный JSON: {ex.Message}",
             });
         }
+        catch (Exception ex)
+        {
+            return Ok(new ApiResponse
+            {
+                Command = "",
+                Success = false,
+                ErrorMessage = ex.Message,
+            });
+        }
 
         return Ok(apiService.Handle(request));
     }

src/ApiServer/DependencyInjection.cs

@@ -19,9 +19,18 @@ public static class DependencyInjection
         services.AddSingleton<IMenuStore, InMemoryMenuStore>();
         services.AddSingleton<ISmsApiService, SmsApiService>();
 
+        services.AddControllers()
+            .AddJsonOptions(options =>
+            {
+                options.JsonSerializerOptions.PropertyNamingPolicy = Contracts.ApiJsonOptions.Instance.PropertyNamingPolicy;
+                options.JsonSerializerOptions.PropertyNameCaseInsensitive = true;
+                options.JsonSerializerOptions.Converters.Add(new DecimalFromStringJsonConverter());
+            });
+
         services.ConfigureHttpJsonOptions(options =>
         {
             options.SerializerOptions.PropertyNamingPolicy = Contracts.ApiJsonOptions.Instance.PropertyNamingPolicy;
+            options.SerializerOptions.PropertyNameCaseInsensitive = true;
             options.SerializerOptions.Converters.Add(new DecimalFromStringJsonConverter());
         });
 

src/ApiServer/Mapping/MenuMapper.cs

@@ -5,16 +5,8 @@ namespace ApiServer.Mapping;
 
 internal static class MenuMapper
 {
-    public static Dish ApplyPriceVisibility(Dish dish, bool withPrice) => new()
+    public static Dish ApplyPriceVisibility(Dish dish, bool withPrice) =>
-    {
+        dish with { Price = withPrice ? dish.Price : 0 };
-        Id = dish.Id,
-        Article = dish.Article,
-        Name = dish.Name,
-        Price = withPrice ? dish.Price : 0,
-        IsWeighted = dish.IsWeighted,
-        FullPath = dish.FullPath,
-        Barcodes = dish.Barcodes,
-    };
 
     public static MenuItem ToGrpc(Dish dish, bool withPrice) => new()
     {

src/ApiServer/Program.cs

@@ -1,10 +1,17 @@
 using ApiServer;
 using ApiServer.Grpc;
+using Microsoft.AspNetCore.Server.Kestrel.Core;
 
 var builder = WebApplication.CreateBuilder(args);
 
+// REST — HTTP/1.1; gRPC (h2c) — отдельный порт с HTTP/2 (без TLS нельзя смешать на одном порту).
+builder.WebHost.ConfigureKestrel(options =>
+{
+    options.ListenLocalhost(5053, listen => listen.Protocols = HttpProtocols.Http1);
+    options.ListenLocalhost(5054, listen => listen.Protocols = HttpProtocols.Http2);
+});
+
 builder.Services.AddApiServer(builder.Configuration);
-builder.Services.AddControllers();
 builder.Services.AddGrpc();
 
 var app = builder.Build();

src/ApiServer/Properties/launchSettings.json

@@ -5,7 +5,7 @@
       "commandName": "Project",
       "dotnetRunMessages": true,
       "launchBrowser": false,
-      "applicationUrl": "http://localhost:5053",
+      "applicationUrl": "http://localhost:5053;http://localhost:5054",
       "environmentVariables": {
         "ASPNETCORE_ENVIRONMENT": "Development"
       }
@@ -14,7 +14,7 @@
       "commandName": "Project",
       "dotnetRunMessages": true,
       "launchBrowser": false,
-      "applicationUrl": "https://localhost:7193;http://localhost:5053",
+      "applicationUrl": "https://localhost:7193;http://localhost:5053;http://localhost:5054",
       "environmentVariables": {
         "ASPNETCORE_ENVIRONMENT": "Development"
       }

src/ApiServer/Services/InMemoryMenuStore.cs

@@ -6,26 +6,22 @@ internal sealed class InMemoryMenuStore : IMenuStore
 {
     private readonly List<Dish> _menu =
     [
-        new()
+        new(
-        {
+            "5979224",
-            Id = "5979224",
+            "A1004292",
-            Article = "A1004292",
+            "Каша гречневая",
-            Name = "Каша гречневая",
+            50,
-            Price = 50,
+            false,
-            IsWeighted = false,
+            @"ПРОИЗВОДСТВО\Гарниры",
-            FullPath = @"ПРОИЗВОДСТВО\Гарниры",
+            ["57890975627974236429"]),
-            Barcodes = ["57890975627974236429"],
+        new(
-        },
+            "9084246",
-        new()
+            "A1004293",
-        {
+            "Конфеты Коровка",
-            Id = "9084246",
+            300,
-            Article = "A1004293",
+            true,
-            Name = "Конфеты Коровка",
+            @"ДЕСЕРТЫ\Развес",
-            Price = 300,
+            []),
-            IsWeighted = true,
-            FullPath = @"ДЕСЕРТЫ\Развес",
-            Barcodes = [],
-        },
     ];
 
     private readonly HashSet<string> _orderIds = new(StringComparer.OrdinalIgnoreCase);

src/Console/Console.csproj

@@ -1,10 +1,35 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
     <TargetFramework>net10.0</TargetFramework>
+    <RootNamespace>ConsoleApp</RootNamespace>
+    <AssemblyName>Sms.Console</AssemblyName>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
+  <ItemGroup>
+    <ProjectReference Include="..\ApiClient\ApiClient.csproj" />
+    <ProjectReference Include="..\Domain\Domain.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="10.0.8" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="10.0.8" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="10.0.8" />
+    <PackageReference Include="EFCore.NamingConventions" Version="10.0.0" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="10.0.8">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="10.0.2" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <None Update="appsettings.json">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
+
 </Project>

src/Console/Data/AppDbContext.cs

@@ -0,0 +1,19 @@
+using Microsoft.EntityFrameworkCore;
+
+namespace ConsoleApp.Data;
+
+public sealed class AppDbContext(DbContextOptions<AppDbContext> options) : DbContext(options)
+{
+    public DbSet<MenuDish> Dishes => Set<MenuDish>();
+
+    protected override void OnModelCreating(ModelBuilder modelBuilder)
+    {
+        modelBuilder.Entity<MenuDish>(entity =>
+        {
+            entity.ToTable("dishes");
+            entity.Property(d => d.Barcodes)
+                .HasColumnType("jsonb")
+                .HasConversion(BarcodesJsonConverter.Instance);
+        });
+    }
+}

src/Console/Data/AppDbContextFactory.cs

@@ -0,0 +1,26 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Design;
+using Microsoft.Extensions.Configuration;
+
+namespace ConsoleApp.Data;
+
+internal sealed class AppDbContextFactory : IDesignTimeDbContextFactory<AppDbContext>
+{
+    public AppDbContext CreateDbContext(string[] args)
+    {
+        var configuration = new ConfigurationBuilder()
+            .SetBasePath(Directory.GetCurrentDirectory())
+            .AddJsonFile("appsettings.json")
+            .Build();
+
+        var connectionString = configuration.GetConnectionString("Default")
+            ?? throw new InvalidOperationException("Connection string 'Default' не задана.");
+
+        var options = new DbContextOptionsBuilder<AppDbContext>()
+            .UseNpgsql(connectionString)
+            .UseSnakeCaseNamingConvention()
+            .Options;
+
+        return new AppDbContext(options);
+    }
+}

src/Console/Data/BarcodesJsonConverter.cs

@@ -0,0 +1,19 @@
+using System.Text.Json;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+namespace ConsoleApp.Data;
+
+internal static class BarcodesJsonConverter
+{
+    private static readonly JsonSerializerOptions JsonOptions = new();
+
+    public static ValueConverter<List<string>, string> Instance { get; } = new(
+        v => Serialize(v),
+        v => Deserialize(v));
+
+    private static string Serialize(List<string> value) =>
+        JsonSerializer.Serialize(value, JsonOptions);
+
+    private static List<string> Deserialize(string value) =>
+        JsonSerializer.Deserialize<List<string>>(value, JsonOptions) ?? [];
+}

src/Console/Data/MenuDish.cs

@@ -0,0 +1,18 @@
+namespace ConsoleApp.Data;
+
+public sealed class MenuDish
+{
+    public string Id { get; set; } = "";
+
+    public string Article { get; set; } = "";
+
+    public string Name { get; set; } = "";
+
+    public decimal Price { get; set; }
+
+    public bool IsWeighted { get; set; }
+
+    public string FullPath { get; set; } = "";
+
+    public List<string> Barcodes { get; set; } = [];
+}

src/Console/Logging/ConsoleLog.cs

@@ -0,0 +1,57 @@
+namespace ConsoleApp.Logging;
+
+public sealed class ConsoleLog : IDisposable
+{
+    private readonly StreamWriter _file;
+
+    private ConsoleLog(string filePath, DateTime startedAt)
+    {
+        FilePath = filePath;
+        StartedAt = startedAt;
+        _file = new StreamWriter(filePath, append: true) { AutoFlush = true };
+        _file.WriteLine($"Запуск: {startedAt:yyyy-MM-dd HH:mm:ss}");
+    }
+
+    public string FilePath { get; }
+
+    public DateTime StartedAt { get; }
+
+    public static ConsoleLog Open(string? fileName = null)
+    {
+        var startedAt = TruncateToSeconds(DateTime.Now);
+        fileName ??= $"test-sms-console-app-{startedAt:yyyyMMdd_HHmmss}.log";
+        return new ConsoleLog(Path.GetFullPath(fileName), startedAt);
+    }
+
+    private static DateTime TruncateToSeconds(DateTime value) =>
+        new(value.Year, value.Month, value.Day, value.Hour, value.Minute, value.Second, value.Kind);
+
+    public void Write(string? text)
+    {
+        Console.Write(text);
+        _file.Write(text);
+    }
+
+    public void WriteLine(string? text = null)
+    {
+        if (text is null)
+        {
+            Console.WriteLine();
+            _file.WriteLine();
+            return;
+        }
+
+        Console.WriteLine(text);
+        _file.WriteLine(text);
+    }
+
+    public string? ReadLine(string prompt)
+    {
+        Write(prompt);
+        var line = Console.ReadLine();
+        _file.WriteLine(line ?? "");
+        return line;
+    }
+
+    public void Dispose() => _file.Dispose();
+}

src/Console/Migrations/20260601135443_Init.Designer.cs

@@ -0,0 +1,69 @@
+// <auto-generated />
+using ConsoleApp.Data;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace ConsoleApp.Migrations
+{
+    [DbContext(typeof(AppDbContext))]
+    [Migration("20260601135443_Init")]
+    partial class Init
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "10.0.8")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("ConsoleApp.Data.MenuDish", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text")
+                        .HasColumnName("id");
+
+                    b.Property<string>("Article")
+                        .IsRequired()
+                        .HasColumnType("text")
+                        .HasColumnName("article");
+
+                    b.Property<string>("Barcodes")
+                        .IsRequired()
+                        .HasColumnType("jsonb")
+                        .HasColumnName("barcodes");
+
+                    b.Property<string>("FullPath")
+                        .IsRequired()
+                        .HasColumnType("text")
+                        .HasColumnName("full_path");
+
+                    b.Property<bool>("IsWeighted")
+                        .HasColumnType("boolean")
+                        .HasColumnName("is_weighted");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text")
+                        .HasColumnName("name");
+
+                    b.Property<decimal>("Price")
+                        .HasColumnType("numeric")
+                        .HasColumnName("price");
+
+                    b.HasKey("Id")
+                        .HasName("pk_dishes");
+
+                    b.ToTable("dishes", (string)null);
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

src/Console/Migrations/20260601135443_Init.cs

@@ -0,0 +1,38 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace ConsoleApp.Migrations
+{
+    /// <inheritdoc />
+    public partial class Init : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "dishes",
+                columns: table => new
+                {
+                    id = table.Column<string>(type: "text", nullable: false),
+                    article = table.Column<string>(type: "text", nullable: false),
+                    name = table.Column<string>(type: "text", nullable: false),
+                    price = table.Column<decimal>(type: "numeric", nullable: false),
+                    is_weighted = table.Column<bool>(type: "boolean", nullable: false),
+                    full_path = table.Column<string>(type: "text", nullable: false),
+                    barcodes = table.Column<string>(type: "jsonb", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("pk_dishes", x => x.id);
+                });
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "dishes");
+        }
+    }
+}

src/Console/Migrations/AppDbContextModelSnapshot.cs

@@ -0,0 +1,66 @@
+// <auto-generated />
+using ConsoleApp.Data;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace ConsoleApp.Migrations
+{
+    [DbContext(typeof(AppDbContext))]
+    partial class AppDbContextModelSnapshot : ModelSnapshot
+    {
+        protected override void BuildModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "10.0.8")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("ConsoleApp.Data.MenuDish", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text")
+                        .HasColumnName("id");
+
+                    b.Property<string>("Article")
+                        .IsRequired()
+                        .HasColumnType("text")
+                        .HasColumnName("article");
+
+                    b.Property<string>("Barcodes")
+                        .IsRequired()
+                        .HasColumnType("jsonb")
+                        .HasColumnName("barcodes");
+
+                    b.Property<string>("FullPath")
+                        .IsRequired()
+                        .HasColumnType("text")
+                        .HasColumnName("full_path");
+
+                    b.Property<bool>("IsWeighted")
+                        .HasColumnType("boolean")
+                        .HasColumnName("is_weighted");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text")
+                        .HasColumnName("name");
+
+                    b.Property<decimal>("Price")
+                        .HasColumnType("numeric")
+                        .HasColumnName("price");
+
+                    b.HasKey("Id")
+                        .HasName("pk_dishes");
+
+                    b.ToTable("dishes", (string)null);
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

src/Console/Program.cs

@@ -1,2 +1,205 @@
-// See https://aka.ms/new-console-template for more information
+using System.Globalization;
-Console.WriteLine("Hello, World!");
+using ApiClient;
+using ApiClient.Grpc;
+using ApiClient.Http;
+using ConsoleApp.Data;
+using ConsoleApp.Logging;
+using Domain.Entities;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Configuration;
+
+var configuration = new ConfigurationBuilder()
+    .SetBasePath(AppContext.BaseDirectory)
+    .AddJsonFile("appsettings.json", optional: false, reloadOnChange: false)
+    .AddEnvironmentVariables()
+    .Build();
+
+var connectionString = configuration.GetConnectionString("Default")
+    ?? throw new InvalidOperationException("Connection string 'Default' не задана.");
+
+var httpOptions = configuration.GetSection("Http").Get<HttpSmsClientOptions>() ?? new();
+var grpcOptions = configuration.GetSection("Grpc").Get<GrpcSmsClientOptions>() ?? new();
+
+using var log = ConsoleLog.Open();
+
+var smsClient = AskSmsClient(log, httpOptions, grpcOptions);
+try
+{
+    log.WriteLine("Инициализация базы данных...");
+    await using var db = CreateDbContext(connectionString);
+    await db.Database.MigrateAsync();
+    log.WriteLine("База данных готова.");
+
+    log.WriteLine("Запрос меню с сервера...");
+    var menuResponse = await smsClient.GetMenuAsync(withPrice: true);
+
+    if (!menuResponse.Success)
+    {
+        log.WriteLine(menuResponse.ToString());
+        return;
+    }
+
+    var dishes = menuResponse.Data?.MenuItems ?? [];
+    await SaveDishesAsync(db, dishes);
+
+    log.WriteLine("Меню:");
+    foreach (var dish in dishes)
+    {
+        log.WriteLine(dish.ToString());
+    }
+
+    var order = ReadOrder(log, dishes);
+
+    log.WriteLine(order.ToString());
+    log.WriteLine("Отправка заказа на сервер...");
+    var sendResponse = await smsClient.SendOrderAsync(order);
+
+    if (sendResponse.Success)
+    {
+        log.WriteLine("УСПЕХ");
+        return;
+    }
+
+    log.WriteLine(sendResponse.ToString());
+}
+finally
+{
+    (smsClient as IDisposable)?.Dispose();
+    log.WriteLine($"Файл лога (запуск {log.StartedAt:yyyy-MM-dd HH:mm:ss}): {log.FilePath}");
+}
+
+static ISmsClient AskSmsClient(ConsoleLog log, HttpSmsClientOptions http, GrpcSmsClientOptions grpc)
+{
+    log.WriteLine("Выберите протокол: 1 — HTTP, 2 — gRPC");
+
+    while (true)
+    {
+        var input = log.ReadLine("> ")?.Trim();
+
+        if (input is "1" or "http" or "Http" or "HTTP")
+        {
+            return SmsClientFactory.CreateHttp(http);
+        }
+
+        if (input is "2" or "grpc" or "Grpc" or "gRPC")
+        {
+            return SmsClientFactory.CreateGrpc(grpc);
+        }
+
+        log.WriteLine("Введите 1 (HTTP) или 2 (gRPC).");
+    }
+}
+
+static AppDbContext CreateDbContext(string connectionString)
+{
+    var options = new DbContextOptionsBuilder<AppDbContext>()
+        .UseNpgsql(connectionString)
+        .UseSnakeCaseNamingConvention()
+        .Options;
+    return new AppDbContext(options);
+}
+
+static async Task SaveDishesAsync(AppDbContext db, IReadOnlyList<Dish> dishes)
+{
+    await db.Dishes.ExecuteDeleteAsync();
+    db.Dishes.AddRange(dishes.Select(d => new MenuDish
+    {
+        Id = d.Id,
+        Article = d.Article,
+        Name = d.Name,
+        Price = d.Price,
+        IsWeighted = d.IsWeighted,
+        FullPath = d.FullPath,
+        Barcodes = d.Barcodes.ToList(),
+    }));
+    await db.SaveChangesAsync();
+}
+
+static Order ReadOrder(ConsoleLog log, IReadOnlyList<Dish> dishes)
+{
+    var dishesByArticle = dishes.ToDictionary(d => d.Article, StringComparer.OrdinalIgnoreCase);
+
+    log.WriteLine();
+    log.WriteLine("Введите позиции заказа в формате Код:Количество;Код:Количество;...");
+
+    while (true)
+    {
+        var input = log.ReadLine("> ");
+
+        if (!TryParseOrderInput(input, out var lines, out var parseError))
+        {
+            log.WriteLine(parseError);
+            continue;
+        }
+
+        var unknownArticles = lines
+            .Select(line => line.Article)
+            .Where(article => !dishesByArticle.ContainsKey(article))
+            .Distinct(StringComparer.OrdinalIgnoreCase)
+            .ToList();
+
+        if (unknownArticles.Count > 0)
+        {
+            log.WriteLine($"Неизвестные коды: {string.Join(", ", unknownArticles)}");
+            continue;
+        }
+
+        Order order = new();
+        foreach (var (article, quantity) in lines)
+        {
+            order = order.AddItem(dishesByArticle[article].Id, quantity);
+        }
+
+        return order;
+    }
+}
+
+static bool TryParseOrderInput(
+    string? input,
+    out List<(string Article, decimal Quantity)> items,
+    out string errorMessage)
+{
+    items = [];
+
+    if (string.IsNullOrWhiteSpace(input))
+    {
+        errorMessage = "Строка заказа не может быть пустой.";
+        return false;
+    }
+
+    var parts = input.Split(';', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
+    foreach (var part in parts)
+    {
+        var pair = part.Split(':', 2);
+        if (pair.Length != 2)
+        {
+            errorMessage = $"Некорректный формат позиции: '{part}'. Ожидается Код:Количество.";
+            return false;
+        }
+
+        var article = pair[0].Trim();
+        if (string.IsNullOrWhiteSpace(article))
+        {
+            errorMessage = "Артикул не может быть пустым.";
+            return false;
+        }
+
+        if (!decimal.TryParse(pair[1].Trim(), NumberStyles.Number, CultureInfo.InvariantCulture, out var quantity)
+            && !decimal.TryParse(pair[1].Trim(), NumberStyles.Number, CultureInfo.CurrentCulture, out quantity))
+        {
+            errorMessage = $"Некорректное количество для артикула '{article}'.";
+            return false;
+        }
+
+        if (quantity <= 0)
+        {
+            errorMessage = $"Количество для артикула '{article}' должно быть больше нуля.";
+            return false;
+        }
+
+        items.Add((article, quantity));
+    }
+
+    errorMessage = "";
+    return true;
+}

src/Console/appsettings.json

@@ -0,0 +1,13 @@
+{
+  "ConnectionStrings": {
+    "Default": "Host=localhost;Port=5432;Database=sms_task;Username=sms;Password=sms"
+  },
+  "Http": {
+    "BaseUrl": "http://localhost:5053",
+    "Username": "user",
+    "Password": "password"
+  },
+  "Grpc": {
+    "Address": "http://localhost:5054"
+  }
+}

src/Contracts/ApiJsonOptions.cs

@@ -12,6 +12,7 @@ public static class ApiJsonOptions
         var options = new JsonSerializerOptions
         {
             PropertyNamingPolicy = null,
+            PropertyNameCaseInsensitive = true,
         };
 
         options.Converters.Add(new DecimalFromStringJsonConverter());

src/Contracts/Menu/GetMenuData.cs

@@ -2,7 +2,10 @@ using Domain.Entities;
 
 namespace Contracts.Menu;
 
-public sealed class GetMenuData
+public sealed record GetMenuData
 {
     public IReadOnlyList<Dish> MenuItems { get; init; } = [];
+
+    public override string ToString() =>
+        string.Join(Environment.NewLine, MenuItems);
 }

src/Contracts/Menu/GetMenuParameters.cs

@@ -1,6 +1,6 @@
 namespace Contracts.Menu;
 
-public sealed class GetMenuParameters
+public sealed record GetMenuParameters(bool WithPrice = true)
 {
-    public bool WithPrice { get; set; } = true;
+    public override string ToString() => $"WithPrice={WithPrice}";
 }

src/Contracts/Orders/SendOrderParameters.cs

@@ -2,9 +2,12 @@ using Domain.Entities;
 
 namespace Contracts.Orders;
 
-public sealed class SendOrderParameters
+public sealed record SendOrderParameters
 {
     public required string OrderId { get; init; }
 
     public IReadOnlyList<OrderItem> MenuItems { get; init; } = [];
+
+    public override string ToString() =>
+        $"OrderId={OrderId}, Items=[{string.Join("; ", MenuItems)}]";
 }

src/Contracts/Requests/ApiRequest.cs

@@ -1,11 +1,16 @@
 namespace Contracts.Requests;
 
-public class ApiRequest
+public record ApiRequest
 {
-    public string Command { get; set; } = "";
+    public string Command { get; init; } = "";
+
+    public override string ToString() => Command;
 }
 
-public class ApiRequest<TParameters> : ApiRequest
+public record ApiRequest<TParameters> : ApiRequest
 {
-    public TParameters? CommandParameters { get; set; }
+    public TParameters? CommandParameters { get; init; }
+
+    public override string ToString() =>
+        CommandParameters is null ? Command : $"{Command} ({CommandParameters})";
 }

src/Contracts/Requests/GetMenuApiRequest.cs

@@ -2,7 +2,7 @@ using Contracts.Menu;
 
 namespace Contracts.Requests;
 
-public sealed class GetMenuApiRequest : ApiRequest<GetMenuParameters>
+public sealed record GetMenuApiRequest : ApiRequest<GetMenuParameters>
 {
     public GetMenuApiRequest()
     {

src/Contracts/Requests/SendOrderApiRequest.cs

@@ -2,7 +2,7 @@ using Contracts.Orders;
 
 namespace Contracts.Requests;
 
-public sealed class SendOrderApiRequest : ApiRequest<SendOrderParameters>
+public sealed record SendOrderApiRequest : ApiRequest<SendOrderParameters>
 {
     public SendOrderApiRequest()
     {

src/Contracts/Responses/ApiResponse.cs

@@ -1,10 +1,13 @@
 namespace Contracts.Responses;
 
-public class ApiResponse
+public record ApiResponse
 {
     public required string Command { get; init; }
 
     public bool Success { get; init; }
 
     public string ErrorMessage { get; init; } = "";
+
+    public override string ToString() =>
+        Success ? $"{Command}: OK" : $"{Command}: {ErrorMessage}";
 }

src/Contracts/Responses/ApiResponseDeserializer.cs

@@ -18,16 +18,33 @@ public static class ApiResponseDeserializer
 
     public static ApiResponse Deserialize(JsonElement json)
     {
-        if (!json.TryGetProperty("Command", out var commandElement))
+        if (!TryGetCommand(json, out var command))
         {
             return json.Deserialize<ApiResponse>(ApiJsonOptions.Instance)!;
         }
 
-        return commandElement.GetString() switch
+        return command switch
         {
             Commands.GetMenu => json.Deserialize<GetMenuApiResponse>(ApiJsonOptions.Instance)!,
             Commands.SendOrder => json.Deserialize<SendOrderApiResponse>(ApiJsonOptions.Instance)!,
             _ => json.Deserialize<ApiResponse>(ApiJsonOptions.Instance)!,
         };
     }
+
+    private static bool TryGetCommand(JsonElement json, out string? command)
+    {
+        foreach (var property in json.EnumerateObject())
+        {
+            if (!property.Name.Equals("Command", StringComparison.OrdinalIgnoreCase))
+            {
+                continue;
+            }
+
+            command = property.Value.GetString();
+            return true;
+        }
+
+        command = null;
+        return false;
+    }
 }

src/Contracts/Responses/GetMenuApiResponse.cs

@@ -2,7 +2,10 @@ using Contracts.Menu;
 
 namespace Contracts.Responses;
 
-public sealed class GetMenuApiResponse : ApiResponse
+public sealed record GetMenuApiResponse : ApiResponse
 {
     public GetMenuData? Data { get; init; }
+
+    public override string ToString() =>
+        Data is null ? base.ToString() : $"{base.ToString()}{Environment.NewLine}{Data}";
 }

src/Contracts/Responses/SendOrderApiResponse.cs

@@ -1,4 +1,3 @@
 namespace Contracts.Responses;
 
-public sealed class SendOrderApiResponse : ApiResponse;
+public sealed record SendOrderApiResponse : ApiResponse;
-

src/Domain/Entities/Dish.cs

@@ -1,24 +1,28 @@
+using System.Text;
+
 namespace Domain.Entities;
 
 /// <summary>
 /// Блюдо из меню (GetMenu / MenuItem).
 /// </summary>
-public sealed class Dish
+public sealed record Dish(
+    string Id,
+    string Article,
+    string Name,
+    decimal Price,
+    bool IsWeighted,
+    string FullPath,
+    IReadOnlyList<string> Barcodes)
 {
-    public required string Id { get; init; }
+    private bool PrintMembers(StringBuilder builder)
-
+    {
-    /// <summary>
+        builder.Append($"Id = {Id}, ");
-    /// Артикул блюда. Используется при вводе заказа с клавиатуры.
+        builder.Append($"Article = {Article}, ");
-    /// </summary>
+        builder.Append($"Name = {Name}, ");
-    public required string Article { get; init; }
+        builder.Append($"Price = {Price}, ");
-
+        builder.Append($"IsWeighted = {IsWeighted}, ");
-    public required string Name { get; init; }
+        builder.Append($"FullPath = {FullPath}, ");
-
+        builder.Append($"Barcodes = [{string.Join(", ", Barcodes)}]");
-    public decimal Price { get; init; }
+        return true;
-
+    }
-    public bool IsWeighted { get; init; }
-
-    public required string FullPath { get; init; }
-
-    public IReadOnlyList<string> Barcodes { get; init; } = [];
 }

src/Domain/Entities/Order.cs

@@ -1,22 +1,18 @@
+using System.Text;
+
 namespace Domain.Entities;
 
 /// <summary>
 /// Заказ (SendOrder).
 /// </summary>
-public sealed class Order
+public sealed record Order(Guid Id, IReadOnlyList<OrderItem> Items)
 {
-    private readonly List<OrderItem> _items = [];
+    public Order()
-
+        : this(Guid.NewGuid(), [])
-    public Guid Id { get; }
-
-    public IReadOnlyCollection<OrderItem> Items => _items;
-
-    public Order(Guid? id = null)
     {
-        Id = id ?? Guid.NewGuid();
     }
 
-    public void AddItem(string id, decimal quantity)
+    public Order AddItem(string id, decimal quantity)
     {
         ArgumentException.ThrowIfNullOrWhiteSpace(id);
 
@@ -28,10 +24,15 @@ public sealed class Order
                 "Количество должно быть больше нуля.");
         }
 
-        _items.Add(new OrderItem
+        var items = Items.ToList();
+        items.Add(new OrderItem(id, quantity));
+        return this with { Items = items };
+    }
+
+    private bool PrintMembers(StringBuilder builder)
     {
-            Id = id,
+        builder.Append($"Id = {Id}, ");
-            Quantity = quantity,
+        builder.Append($"Items = [{string.Join(", ", Items)}]");
-        });
+        return true;
     }
 }

src/Domain/Entities/OrderItem.cs

@@ -3,15 +3,4 @@ namespace Domain.Entities;
 /// <summary>
 /// Позиция заказа (SendOrder / MenuItems).
 /// </summary>
-public sealed class OrderItem
+public sealed record OrderItem(string Id, decimal Quantity);
-{
-    /// <summary>
-    /// Идентификатор блюда на сервере (<see cref="Dish.Id"/>).
-    /// </summary>
-    public required string Id { get; init; }
-
-    /// <summary>
-    /// Количество. Для весовых блюд допускаются дробные значения.
-    /// </summary>
-    public decimal Quantity { get; init; }
-}