Mohammad Umer Mohammad Umer - 1 month ago 17
Javascript Question

Custom Woocommerce Payment Gateway for Squareup.com

I am Developing Square Connect Payment Gateway for Woocommerce.

Here is gatway documents and credit card form which the give me to embed for gateway.

https://docs.connect.squareup.com/articles/adding-payment-form/

Now the process is Payment form return card nonce which use to deduct payment from customer.

Here is sample code.

require_once 'SquareConnect/autoload.php';

# Assume you have assigned values to the following variables:
# $nonce
# $location_id
# $access_token

$transaction_api = new \SquareConnect\Api\TransactionApi();

$request_body = array (

"card_nonce" => $nonce,

# Monetary amounts are specified in the smallest unit of the applicable currency.
# This amount is in cents. It's also hard-coded for $1, which is not very useful.
"amount_money" => array (
"amount" => 100,
"currency" => "USD"
),

# Every payment you process for a given business have a unique idempotency key.
# If you're unsure whether a particular payment succeeded, you can reattempt
# it with the same idempotency key without worrying about double charging
# the buyer.
"idempotency_key" => uniqid()
);

# The SDK throws an exception if a Connect endpoint responds with anything besides 200 (success).
# This block catches any exceptions that occur from the request.
try {
print_r($transaction_api->charge($access_token, $location_id, $request_body));
} catch (Exception $e) {
echo "Caught exception " . $e->getMessage();


Problem is Payment form return nonce with javascript function.

Here is how i embed form in my plugin.

function payment_fields(){
?>
<p class="form-row form-row form-row-wide">
<label>Card Number</label>
<div id="sq-card-number"></div>
</p>
<p class="form-row form-row form-row-wide">
<label>CVV</label>
<div id="sq-cvv"></div>
</p>
<p class="form-row form-row form-row-wide">
<label>Expiration Date</label>
<div id="sq-expiration-date"></div>
</p>
<p class="form-row form-row form-row-wide">
<label>Postal Code</label>
<div id="sq-postal-code"></div>
</p>
<input type="hidden" id="payment_nonce" value="" />
<script src="https://js.squareup.com/v2/paymentform" type="text/javascript"></script>
<script type="text/javascript">
var paymentForm = new SqPaymentForm({
applicationId: 'sandbox-sq0idp-Yjm9KUoP_AiqDuGgwV6q4A', // <-- REQUIRED: Add Application ID
inputClass: 'sq-input',
inputStyles: [
{
fontSize: '15px'
}
],
cardNumber: {
elementId: 'sq-card-number',
placeholder: '.... .... .... ....'
},
cvv: {
elementId: 'sq-cvv',
placeholder: 'CVV'
},
expirationDate: {
elementId: 'sq-expiration-date',
placeholder: 'MM/YY'
},
postalCode: {
elementId: 'sq-postal-code'
},
callbacks: {
cardNonceResponseReceived: function(errors, nonce, cardData) {
if (errors) {
// handle errors
errors.forEach(function(error) { console.log(error.message); });
} else {
// handle nonce
console.log('Nonce received:');
console.log(nonce);
}
},
unsupportedBrowserDetected: function() {
// Alert the buyer that their browser is not supported
}
}
});
function requestCardNonce() {
paymentForm.requestCardNonce();
}
paymentForm.build();
</script>
<?php
}


This is nonce response

console.log('Nonce received:');
console.log(nonce);

Now not sure how to get this nonce at process payment section of woocomerce?

Answer

Okay i did it my self with ajax and the session variable.

here is my code.

    function payment_fields(){
?>

    <p  class="form-row form-row form-row-wide">
      <label>Card Number</label>
      <div id="sq-card-number"></div>
    </p>
    <p  class="form-row form-row form-row-wide">
      <label>CVV</label>
      <div id="sq-cvv"></div>
    </p>
    <p  class="form-row form-row form-row-wide">

      <label>Expiration Date</label>
      <div id="sq-expiration-date"></div>
    </p>
    <p  class="form-row form-row form-row-wide">
      <label>Postal Code</label>
      <div id="sq-postal-code"></div>
    </p>
    <input type="hidden" id="payment_nonce" value="" />
    <script src="https://js.squareup.com/v2/paymentform" type="text/javascript"></script>
    <script type="text/javascript">

    var paymentForm = new SqPaymentForm({
        applicationId: '<?php echo $this->api_id; ?>', // <-- REQUIRED: Add Application ID
        inputClass: 'sq-input',
        inputStyles: [
          {
            fontSize: '15px'
          }
        ],
        cardNumber: {
          elementId: 'sq-card-number',
          placeholder: '.... .... .... ....'
        },
        cvv: {
          elementId: 'sq-cvv',
          placeholder: 'CVV'
        },
        expirationDate: {
          elementId: 'sq-expiration-date',
          placeholder: 'MM/YY'
        },
        postalCode: {
          elementId: 'sq-postal-code'
        },
        callbacks: {
          cardNonceResponseReceived: function(errors, nonce, cardData) {
            if (errors) {
              // handle errors
              errors.forEach(function(error) { console.log(error.message); });
            } else {
              // handle nonce
              console.log('Nonce received:');
              console.log(nonce);
                //localStorage.setItem('card_nonce',nonce);

                  var ajaxurl = "<?php echo admin_url( 'admin-ajax.php' ); ?>";
                      var data = {
                        'action': 'payment_nonce',
                        'nonce_recived': nonce,
                    };
                      jQuery.post(ajaxurl, data, function(response) {
                        });
            }
          },
          unsupportedBrowserDetected: function() {
            // Alert the buyer that their browser is not supported
          }
        }
      });

      function requestCardNonce() {
        paymentForm.requestCardNonce();
      }
    paymentForm.build();

    jQuery(document).ready(function ($) {

      $("form.woocommerce-checkout")
      .on('submit', function() { return requestCardNonce(); } ); 

    });

    </script>
    <style type="text/css">
        .sq-input {
          border: 1px solid rgb(223, 223, 223);
          outline-offset: -2px;
          margin-bottom: 5px;
        }
        .sq-input--focus {
          /* how your inputs should appear when they have focus */
          outline: 5px auto rgb(59, 153, 252);
        }
        .sq-input--error {
          /* how your inputs should appear when invalid */
          outline: 5px auto rgb(255, 97, 97);
        }
      </style>

    <?php
        }
        // Submit payment and handle response
        public function process_payment( $order_id ) {
            session_start();
            global $woocommerce;
            sleep(8);
            // Get this Order's information so that we know
            // who to charge and how much
                $customer_order = new WC_Order( $order_id );
                $amount = floatval( preg_replace( '#[^\d.]#', '', $customer_order->order_total ) ); 
               //$cart_total = number_format((int)$customer_order->order_total, 2, '.', ''); 
                $nonce = $_SESSION['nonce_recived']; 

                $access_token = $this->access_token;
                $location_api = new \SquareConnect\Api\LocationApi();
                $location_id = $location_api->listLocations($access_token); 
                $location_arr = json_decode ($location_id);

                $location_id = $location_arr->locations[0]->id; 

                $transaction_api = new \SquareConnect\Api\TransactionApi();

                $request_body = array (

                  "card_nonce" => $nonce,

                  # Monetary amounts are specified in the smallest unit of the applicable currency.
                  # This amount is in cents. It's also hard-coded for $1, which is not very useful.
                  "amount_money" => array (
                    "amount" => round($amount),
                    "currency" => "USD"
                  ),

                  # Every payment you process for a given business have a unique idempotency key.
                  # If you're unsure whether a particular payment succeeded, you can reattempt
                  # it with the same idempotency key without worrying about double charging
                  # the buyer.
                  "idempotency_key" => uniqid()
                );

                # The SDK throws an exception if a Connect endpoint responds with anything besides 200 (success).
                # This block catches any exceptions that occur from the request.
                try {
                  $payment_sucess = $transaction_api->charge($access_token, $location_id, $request_body);  

                    // Payment has been successful
                    $customer_order->add_order_note( __( 'payment completed.', 'spyr-square-gateway' ) );

                    // Mark order as Paid
                    $customer_order->payment_complete();

                    // Empty the cart (Very important step)
                    $woocommerce->cart->empty_cart();

                    // Redirect to thank you page
                    return array(
                        'result'   => 'success',
                        'redirect' => $this->get_return_url( $customer_order ),
                    );
                } catch (Exception $e) {
                  $error = "Caught exception " . $e->getMessage();
                // Transaction was not succesful
                // Add notice to the cart
                wc_add_notice( $error, 'error' );
                // Add note to the order for your reference
                $customer_order->add_order_note( 'Error: '. $error);
                }

        }
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