Adding product to cart through QR code?

[Sterling-Malory-Archer]

I have a client that would like to add a product to the cart by scanning a QR code.

Is this possible? How can I achieve this? I have a QR code scanner script and I know I should reference cartPanel script and it's method .AddToCart, but how can I reference product and variant?

   if (cameraManager.TryGetLatestImage(out XRCameraImage image))
                        {
                            // 'image' is an acquired resource that must be diposed when we are done.
                            using (image)
                            {
                                // - Convert the image to RGBA. This takes considerable time, so there are also asynchronous
                                //   options. It's easier to understand the synchronous code for this example, though.
                                //
                                // - It's /much/ faster to convert to a single channel format, e.g., TextureFormat.R8, if
                                //   your 'BarcodeReader' can accept that. But if it only accepts an RGBA image, then this
                                //   should work too.
                                var conversionParams = new XRCameraImageConversionParams(image, TextureFormat.RGBA32, CameraImageTransformation.MirrorY);

                                // Get the size (number of bytes) of the buffer required to hold the RGBA pixel data.
                                var dataSize = image.GetConvertedDataSize(conversionParams);
                                var bytesPerPixel = 4; // because we chose an RGBA format.

                                // Since the 'BarcodeReader' code you posted accepts a managed
                                // array, that's what I've used here. It would be more efficient
                                // to use a NativeArray if the BarcodeReader can use that.
                                var pixels = new Color32[dataSize / bytesPerPixel];
                                fixed (void* ptr = pixels)
                                {
                                    image.Convert(conversionParams, new IntPtr(ptr), dataSize);
                                }

                                IBarcodeReader barcodeReader = new BarcodeReader();
                                // The 'pixels' array now contains the image data.
                                var result = barcodeReader.Decode(pixels, image.width, image.height);
                                if (result != null)
                                {
                                    if (result.Text.Contains("productID"))
                                    {
                                           //Add product to cart
                                           cartPanel.AddToCart(productID);
                                    }
                                }
                            }
                        }

Any help is kindly appreciated!

[Russel1]

You have to add the ProductVariantID, price, quantity etc. to your QRCode and then pass it to shopify via cart.LineItems.AddOrUpdate(ProductVariant, quantity).

[Sterling-Malory-Archer]

You have to add the ProductVariantID, price, quantity etc. to your QRCode and then pass it to shopify via cart.LineItems.AddOrUpdate(ProductVariant, quantity).

Hey, thanks for the reply,

I have a question:

Can I somehow parse the user's email when I call this method?

 cart.GetWebCheckoutLink();

Thank you so much in advance!

[Russel1]

Good question, you only get the link and no success if the user has bought the product.

I only know it works with cart.CheckoutWithWebView with ShopifyBuy.Client().Query(.....

[Sterling-Malory-Archer]

Hey Russel,

I have a question, that I hope you can help me out, I solved the QR code adding by creating a custom script, however, when I scan one QR code that adds the first item, then open checkout, then go back and scan the QR code for the second item, it doesn't update the store, how can I fix that? Thanks.

 public BrowserOpener inAppBrowser;
    Cart cart;

    List<ProductVariant> firstProductVariants, secondProductVariants;
    ProductVariant firstProductFirstVariant, secondProductFirstVariant;

    List<ProductVariant> collectionVariants;
    ProductVariant collectionVariant;
    // Start is called before the first frame update
    void Start()
    {
        string accessToken = "***************************";
        string shopDomain = "***************************";

        ShopifyBuy.Init(accessToken, shopDomain);

        cart = ShopifyBuy.Client().Cart();

        ShopifyBuy.Client().products((products, error, after) => {
            if (error != null)
            {
                Debug.Log(error.Description);

                switch (error.Type)
                {
                    // An HTTP error is actually Unity's WWW.error
                    case ShopifyError.ErrorType.HTTP:
                        break;
                    // Although it's unlikely, an invalid GraphQL query might be sent.
                    // Report an issue to https://github.com/shopify/unity-buy-sdk/issues
                    case ShopifyError.ErrorType.GraphQL:
                        break;
                };
            }
            else
            {
                Debug.Log("Here is the first page of products:");

                // products is a List<Product>
                foreach (Product product in products)
                {
                    Debug.Log("Product Title: " + product.title());
                    Debug.Log("Product Description: " + product.descriptionHtml());
                    Debug.Log("--------");
                }
            }

            firstProductVariants = (List<ProductVariant>)products[0].variants();
            firstProductFirstVariant = firstProductVariants[0];


            secondProductVariants = (List<ProductVariant>)products[1].variants();
            secondProductFirstVariant = secondProductVariants[0];

        });
    }

    // Update is called once per frame
    void Update()
    {
        if (inAppBrowser.pageToOpen.Contains("second"))
        {
            AddSecondItem();
        }

        if (inAppBrowser.pageToOpen.Contains("first"))
        {
            AddFirstItem();
        }
    }

    public void AddFirstItem()
    {
        // The following example adds a line item using the first products first variant.
        // In this case, the cart will have 1 copy of the variant.
        cart.LineItems.AddOrUpdate(firstProductFirstVariant, 1);
    }

    public void AddSecondItem()
    {
        // The following example adds a line item using the second products first variant.
        // In this case, the cart will have 1 copy of the variant.
        cart.LineItems.AddOrUpdate(secondProductFirstVariant, 1);
    }

    //Checkout with inAppBrowser
    public void WebCheckOut()
    {
        cart.GetWebCheckoutLink(
               success: (link) => {
                   //inAppBrowser.pageToOpen = link;
                   //inAppBrowser.OnButtonClicked();
                   Application.OpenURL(link);

               },
               failure: (checkoutError) => {
                   Debug.Log(checkoutError.Description);
               }
           );
    }

[Russel1]

I see no problem in your code, please try cart.CheckoutWithWebView.

Otherwise I would suggest you save all items in a list yourself and always empty the shopping cart before you add your own list to the cart.

[Sterling-Malory-Archer]

I see no problem in your code, please try cart.CheckoutWithWebView.

Otherwise I would suggest you save all items in a list yourself and always empty the shopping cart before you add your own list to the cart.

Since I use a plugin called inAppBrowser which opens browser in the app itself, I would like to remain it with GetWebCheckOut.

However, would you help me with this other part, where you said to save all items in a list and empty the shopping cart?

Thank you

[Sterling-Malory-Archer]

The same thing happened with cart.CheckoutWithWebView, I tried to open the empty cart, then get back in the app and add the first item to the cart, open again, but it still says it's empty

[Russel1]

Cart cart = ShopifyBuy.Client().Cart();

//empty cart
cart.Reset();

foreach (var cartItem in cartItems) {
cart.LineItems.AddOrUpdate(cartItem, 1);
}

[Russel1]

So it's best to remember each item somehow and then rebuild the shopping cart with the current items each time

[Sterling-Malory-Archer]

Hey Russel,

Thank you for your response and help! It actually works like a charm, I have another thing, can you push an e-mail of the user to the checkout?

Thanks

[Sterling-Malory-Archer]

I tried using this

 cartState.SetEmailAddress(tMP_InputField.text,
            (error) =>
            {
                Debug.Log(error);
            });

But it gives me a null reference error.