(C++) Shopify Update Inventory Level for a Product (Adjust available quantity)

Use the adjust endpoint with the location ID and inventory item ID to increase or decrease the available quantity for an inventory level:

For more information, see https://shopify.dev/tutorials/manage-product-inventory-with-admin-api#update-inventory-levels-for-a-product-variant

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#include <CkHttp.h>
#include <CkJsonObject.h>
#include <CkHttpResponse.h>

void ChilkatSample(void)
    {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkHttp http;

    http.put_Login("SHOPIFY_PRIVATE_API_KEY");
    http.put_Password("SHOPIFY_PRIVATE_API_KEY");

    // Also see: How to retrieve inventory levels

    http.put_Accept("application/json");

    // The following JSON is sent in the request body:

    // {
    //   "location_id": 6884556842,
    //   "inventory_item_id": 12250274365496,
    //   "available_adjustment": 1
    // }

    // Use this online tool to generate the code from sample JSON: 
    // Generate Code to Create JSON

    CkJsonObject jsonRequestBody;
    jsonRequestBody.UpdateInt("location_id",6884556842);
    jsonRequestBody.UpdateInt("inventory_item_id",12250274365496);
    jsonRequestBody.UpdateInt("available_adjustment",1);

    const char *url = "https://{shop}.myshopify.com/admin/api/2020-04/inventory_levels/adjust.json";

    CkHttpResponse *resp = http.PText("POST",url,jsonRequestBody.emit(),"utf-8","application/json",false,false);
    if (http.get_LastMethodSuccess() != true) {
        std::cout << http.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "Response Status Code: " << resp->get_StatusCode() << "\r\n";

    CkJsonObject jsonResponse;
    jsonResponse.Load(resp->bodyStr());
    jsonResponse.put_EmitCompact(false);
    std::cout << jsonResponse.emit() << "\r\n";

    if (resp->get_StatusCode() >= 300) {
        std::cout << "Failed." << "\r\n";
        delete resp;
        return;
    }

    delete resp;

    // Sample output...
    // (See the parsing code below..)
    // 
    // Use the this online tool to generate parsing code from sample JSON: 
    // Generate Parsing Code from JSON

    // {
    //   "inventory_level": {
    //     "inventory_item_id": 12250274365496,
    //     "location_id": 6884556842,
    //     "available": 9,
    //     "updated_at": "2018-06-26T15:04:49-04:00",
    // ...
    //     "admin_graphql_api_id": "gid://shopify/InventoryLevel/6485147690?inventory_item_id=12250274365496"
    // ...
    //   }
    // }
    // 

    int inventory_levelInventory_item_id = jsonResponse.IntOf("inventory_level.inventory_item_id");
    int inventory_levelLocation_id = jsonResponse.IntOf("inventory_level.location_id");
    int inventory_levelAvailable = jsonResponse.IntOf("inventory_level.available");
    const char *inventory_levelUpdated_at = jsonResponse.stringOf("inventory_level.updated_at");
    const char *inventory_levelAdmin_graphql_api_id = jsonResponse.stringOf("inventory_level.admin_graphql_api_id");
    }