FourTwenty.LokoMerchant.Client

.NET client library for the Loko Merchant API, simplifying delivery order management, pricing queries, and webhook integration in C#.

Features

• Store Management: Update store status (pause/unpause) and manage schedules
• Webhook Management: Create, update, delete webhook subscriptions and retrieve events
• Menu Management: Import products, offers, categories, and complete menu structures
• OAuth 2.0 Authentication: Secure client credentials authentication
• Async/Await Support: Modern C# async patterns throughout
• Strongly Typed: Complete type safety with comprehensive models
• Dependency Injection: Easy integration with .NET Core DI container

Installation

Install via NuGet Package Manager:

dotnet add package FourTwenty.LokoMerchant.Client

Or via Package Manager Console in Visual Studio:

Install-Package FourTwenty.LokoMerchant.Client

Quick Start

Basic Usage

using FourTwenty.LokoMerchant.Client;
using FourTwenty.LokoMerchant.Client.Models;

// Configure HttpClient with base URL and authentication
var httpClient = new HttpClient();
httpClient.BaseAddress = new Uri("https://merchant-api.silpo.ua/");

// Add bearer token to requests (see Authentication section below)
httpClient.DefaultRequestHeaders.Authorization = 
    new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", "your-access-token");

// Create the client
var client = new LokoMerchantClient(httpClient);

// Use the client
await client.Store.UpdateStatus("store-id", StoreStatus.Unpause, new BranchStatusBodyRequest());
var subscriptions = await client.Webhooks.GetSubscriptions();
var importResult = await client.Menu.ImportProducts(new ImportProductRequest());

Authentication

The Loko Merchant API uses OAuth 2.0 client credentials flow. Here's how to set up authentication:

using FourTwenty.LokoMerchant.Client;
using FourTwenty.LokoMerchant.Client.Identity;

// Create identity client for authentication
var identityHttpClient = new HttpClient { BaseAddress = new Uri("https://auth.silpo.ua/") };
var identityClient = new LokoMerchantIdentityClient(identityHttpClient);

// Get access token
var config = new LokoMerchantConfig
{
    ClientId = "your-client-id",
    ClientSecret = "your-client-secret"
};

var tokenResponse = await identityClient.GetToken(config.ClientId, config.ClientSecret);
if (tokenResponse != null)
{
    // Configure API client with the access token
    var apiHttpClient = new HttpClient { BaseAddress = new Uri("https://merchant-api.silpo.ua/") };
    apiHttpClient.DefaultRequestHeaders.Authorization = 
        new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", tokenResponse.AccessToken);
    
    var client = new LokoMerchantClient(apiHttpClient);
    // Use the client...
}

ASP.NET Core Integration

Using Extension Methods (Recommended)

The easiest way to integrate with ASP.NET Core is using the provided extension methods:

using FourTwenty.LokoMerchant.Client.Extensions;

var builder = WebApplication.CreateBuilder(args);

// Configure Loko Merchant client with extension method
builder.Services.AddLokoMerchantClient(options =>
{
    options.ClientId = builder.Configuration["LokoMerchant:ClientId"];
    options.ClientSecret = builder.Configuration["LokoMerchant:ClientSecret"];
    // Optional: Configure custom URLs (defaults to production)
    options.IdentityBaseUrl = builder.Configuration["LokoMerchant:IdentityBaseUrl"]; 
    options.ApiBaseUrl = builder.Configuration["LokoMerchant:ApiBaseUrl"];
});

var app = builder.Build();

Using Method Parameters for URLs (Alternative)

You can also pass URLs directly as method parameters for staging/testing environments:

builder.Services.AddLokoMerchantClient(
    identityBaseUrl: "https://identity-public-qa.foodtech.team/",
    apiBaseUrl: "https://global-api-qa.foodtech.team/public/merchant",
    options =>
    {
        options.ClientId = builder.Configuration["LokoMerchant:ClientId"];
        options.ClientSecret = builder.Configuration["LokoMerchant:ClientSecret"];
    });

Note: Using configuration properties is the preferred approach as it's more flexible and testable.

Manual HttpClient Factory Setup

If you need more control over the configuration:

using FourTwenty.LokoMerchant.Client;
using FourTwenty.LokoMerchant.Client.Identity;

var builder = WebApplication.CreateBuilder(args);

// Configure Loko Merchant settings
builder.Services.Configure<LokoMerchantConfig>(
    builder.Configuration.GetSection("LokoMerchant"));

// Register HttpClient for identity server
builder.Services.AddHttpClient<ILokoMerchantIdentityClient, LokoMerchantIdentityClient>(client =>
{
    client.BaseAddress = new Uri("https://auth.silpo.ua/");
});

// Register HttpClient for API with token authentication
builder.Services.AddHttpClient<ILokoMerchantClient, LokoMerchantClient>(async (serviceProvider, client) =>
{
    client.BaseAddress = new Uri("https://merchant-api.silpo.ua/");
    
    // Get token and set authorization header
    var config = serviceProvider.GetRequiredService<IOptions<LokoMerchantConfig>>().Value;
    var identityClient = serviceProvider.GetRequiredService<ILokoMerchantIdentityClient>();
    
    var tokenResponse = await identityClient.GetToken(config.ClientId, config.ClientSecret);
    if (tokenResponse != null)
    {
        client.DefaultRequestHeaders.Authorization = 
            new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", tokenResponse.AccessToken);
    }
});

var app = builder.Build();

var app = builder.Build();

```csharp
using FourTwenty.LokoMerchant.Client;
using FourTwenty.LokoMerchant.Client.Identity;

var builder = WebApplication.CreateBuilder(args);

// Configure Loko Merchant settings
builder.Services.Configure<LokoMerchantConfig>(
    builder.Configuration.GetSection("LokoMerchant"));

// Register HttpClient for identity server
builder.Services.AddHttpClient<ILokoMerchantIdentityClient, LokoMerchantIdentityClient>(client =>
{
    client.BaseAddress = new Uri("https://auth.silpo.ua/");
});

// Register HttpClient for API with token authentication
builder.Services.AddHttpClient<ILokoMerchantClient, LokoMerchantClient>(async (serviceProvider, client) =>
{
    client.BaseAddress = new Uri("https://merchant-api.silpo.ua/");
    
    // Get token and set authorization header
    var config = serviceProvider.GetRequiredService<IOptions<LokoMerchantConfig>>().Value;
    var identityClient = serviceProvider.GetRequiredService<ILokoMerchantIdentityClient>();
    
    var tokenResponse = await identityClient.GetToken(config.ClientId, config.ClientSecret);
    if (tokenResponse != null)
    {
        client.DefaultRequestHeaders.Authorization = 
            new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", tokenResponse.AccessToken);
    }
});

var app = builder.Build();

Configuration (appsettings.json)

{
  "LokoMerchant": {
    "ClientId": "your-client-id",
    "ClientSecret": "your-client-secret",
    "IdentityBaseUrl": "https://auth.silpo.ua/",
    "ApiBaseUrl": "https://merchant-api.silpo.ua/"
  }
}

The IdentityBaseUrl and ApiBaseUrl properties are optional and will default to production URLs if not specified.

Using in Controllers

[ApiController]
[Route("api/[controller]")]
public class StoreController : ControllerBase
{
    private readonly ILokoMerchantClient _lokoClient;

    public StoreController(ILokoMerchantClient lokoClient)
    {
        _lokoClient = lokoClient;
    }

    [HttpPost("{storeId}/pause")]
    public async Task<IActionResult> PauseStore(string storeId)
    {
        try
        {
            await _lokoClient.Store.UpdateStatus(storeId, StoreStatus.Pause, new BranchStatusBodyRequest());
            return Ok();
        }
        catch (Exception ex)
        {
            return BadRequest(ex.Message);
        }
    }

    [HttpPost("menu/products")]
    public async Task<IActionResult> ImportProducts(ImportProductRequest request)
    {
        try
        {
            var result = await _lokoClient.Menu.ImportProducts(request);
            return Ok(new { ImportId = result?.Id });
        }
        catch (Exception ex)
        {
            return BadRequest(ex.Message);
        }
    }
}

Usage Examples

Store Management

// Pause a store
await client.Store.UpdateStatus("store-123", StoreStatus.Pause, new BranchStatusBodyRequest());

// Unpause a store
await client.Store.UpdateStatus("store-123", StoreStatus.Unpause, new BranchStatusBodyRequest());

// Update store schedule
var schedules = new List<BranchDaySchedule>
{
    new BranchDaySchedule
    {
        // Configure schedule details
    }
};
await client.Store.UpdateSchedule("store-123", schedules);

// Update multiple stores' schedules
var storeSchedules = new List<BranchDayStoreSchedule>
{
    new BranchDayStoreSchedule
    {
        // Configure store schedule details
    }
};
await client.Store.UpdateStoresSchedule(storeSchedules);

Webhook Management

// Create a webhook subscription
var subscriptionRequest = new SubscriptionRequest
{
    Callback = "https://your-app.com/webhooks/loko",
    Events = new List<WebhookEvent> { WebhookEvent.OrderCreated, WebhookEvent.OrderStatusChanged },
    CompanyIds = new List<string> { "company-123" }
};

var subscription = await client.Webhooks.CreateSubscription(subscriptionRequest);
Console.WriteLine($"Subscription created with ID: {subscription?.Id}");
Console.WriteLine($"Webhook secret: {subscription?.Secret}");

// List all subscriptions
var subscriptions = await client.Webhooks.GetSubscriptions();
foreach (var sub in subscriptions?.Items ?? Enumerable.Empty<SubscriptionResponse>())
{
    Console.WriteLine($"Subscription: {sub.Id} -> {sub.Callback}");
}

// Update a subscription
var updateRequest = new SubscriptionRequest
{
    Callback = "https://your-app.com/webhooks/loko-updated",
    Events = new List<WebhookEvent> { WebhookEvent.OrderCreated }
};
await client.Webhooks.UpdateSubscription("subscription-id", updateRequest);

// Delete a subscription
await client.Webhooks.DeleteSubscription("subscription-id");

// Get webhook events history
var events = await client.Webhooks.GetSubscriptionEvents();

Menu Management

// Import products
var productRequest = new ImportProductRequest
{
    // Configure products to import
};
var importResult = await client.Menu.ImportProducts(productRequest);
Console.WriteLine($"Import started with ID: {importResult?.Id}");

// Import offers (pricing)
var offersRequest = new ImportOffersRequest
{
    // Configure offers to import
};
await client.Menu.ImportOffers(offersRequest);

// Import categories
var categories = new List<Category>
{
    new Category
    {
        ExternalId = "cat-1",
        Name = "Main Dishes",
        Position = 1
    },
    new Category
    {
        ExternalId = "cat-2",
        Name = "Beverages",
        Position = 2,
        ParentExternalId = null
    }
};
await client.Menu.ImportCategories("company-123", categories);

// Import complete menu
var menuRequest = new ImportMenuRequest
{
    // Configure complete menu structure
};
await client.Menu.ImportMenu("company-123", menuRequest);

// Partial menu import (updates only specific items)
var partialRequest = new PartialImportRequest
{
    // Configure partial update
};
await client.Menu.PartialMenuImport(partialRequest);

Error Handling

The client includes built-in error handling. API errors are automatically processed and thrown as exceptions:

try
{
    await client.Store.UpdateStatus("invalid-store-id", StoreStatus.Pause, new BranchStatusBodyRequest());
}
catch (HttpRequestException ex)
{
    // Handle HTTP-related errors (network issues, API errors)
    Console.WriteLine($"Request failed: {ex.Message}");
}
catch (JsonException ex)
{
    // Handle JSON deserialization errors
    Console.WriteLine($"Invalid response format: {ex.Message}");
}
catch (Exception ex)
{
    // Handle other exceptions
    Console.WriteLine($"Unexpected error: {ex.Message}");
}

API Reference

Core Interfaces

• ILokoMerchantClient: Main client interface providing access to all functionality
• IStoreProvider: Store management operations (status, scheduling)
• IWebhooksProvider: Webhook subscription management
• IMenuProvider: Menu and product catalog management
• IBearerTokenProvider: Token management for authentication

Models

The library includes comprehensive models for all API entities:

• Products: BaseProduct, Product, MenuProduct
• Categories: Category, MenuProductCategory
• Offers: BaseOffer, Offer, MenuOffer
• Options: Option, OptionGroup, OptionInner
• Schedules: BranchDaySchedule, WorkSchedule
• Webhooks: SubscriptionRequest, SubscriptionResponse, WebhookEvent
• Responses: IdResponse, PagedResponse<T>, LokoAuthResponse

API Documentation

For detailed API documentation, visit: Loko Merchant API Documentation

Contributing

1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Add tests if applicable
5. Submit a pull request

License

This project is licensed under the MIT License - see the LICENSE file for details.

Support

For issues and questions:

• Create an issue on GitHub
• Check the API documentation