Implement Checkout Gateway

src/CheckoutGateway.php

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+<?php
+
+/**
+ * Stripe Payment Intents Gateway.
+ */
+
+namespace Omnipay\Stripe;
+
+/**
+ * Stripe Payment Intents Gateway.
+ *
+ * @see  \Omnipay\Stripe\AbstractGateway
+ * @see  \Omnipay\Stripe\Message\AbstractRequest
+ * @link https://stripe.com/docs/api
+ * @method \Omnipay\Common\Message\NotificationInterface acceptNotification(array $options = array())
+ * @method \Omnipay\Common\Message\RequestInterface refund(array $options = array())
+ * @method \Omnipay\Common\Message\RequestInterface void(array $options = array())
+ */
+class CheckoutGateway extends AbstractGateway
+{
+    /**
+     * @inheritdoc
+     */
+    public function getName()
+    {
+        return 'Stripe Checkout';
+    }
+
+    /**
+     * @inheritdoc
+     * @return \Omnipay\Stripe\Message\Checkout\PurchaseRequest
+     */
+    public function purchase(array $parameters = array())
+    {
+        return $this->createRequest('\Omnipay\Stripe\Message\Checkout\PurchaseRequest', $parameters);
+    }
+
+    /**
+     * @inheritdoc
+     * @return \Omnipay\Stripe\Message\Checkout\PurchaseRequest
+     */
+    public function fetchTransaction(array $parameters = array())
+    {
+        return $this->createRequest('\Omnipay\Stripe\Message\Checkout\FetchTransactionRequest', $parameters);
+    }
+
+    /**
+     * @inheritdoc
+     *
+     * @return \Omnipay\Stripe\Message\AuthorizeRequest
+     */
+    public function authorize(array $parameters = array())
+    {
+        return $this->createRequest('\Omnipay\Stripe\Message\AuthorizeRequest', $parameters);
+    }
+
+    /**
+     * @inheritdoc
+     *
+     * @return \Omnipay\Stripe\Message\CaptureRequest
+     */
+    public function capture(array $parameters = array())
+    {
+        return $this->createRequest('\Omnipay\Stripe\Message\CaptureRequest', $parameters);
+    }
+}

src/Message/Checkout/AbstractRequest.php

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+<?php
+
+/**
+ * Stripe Abstract Request.
+ */
+
+namespace Omnipay\Stripe\Message\Checkout;
+
+/**
+ * Stripe Payment Intent Abstract Request.
+ *
+ * This is the parent class for all Stripe payment intent requests.
+ * It adds just a getter and setter.
+ *
+ * @see \Omnipay\Stripe\PaymentIntentsGateway
+ * @see \Omnipay\Stripe\Message\AbstractRequest
+ * @link https://stripe.com/docs/api/payment_intents
+ */
+abstract class AbstractRequest extends \Omnipay\Stripe\Message\AbstractRequest
+{
+}

src/Message/Checkout/FetchTransactionRequest.php

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+<?php
+
+/**
+ * Stripe Fetch Transaction Request.
+ */
+
+namespace Omnipay\Stripe\Message\Checkout;
+
+/**
+ * Stripe Fetch Transaction Request.
+ * Example -- note this example assumes that the purchase has been successful
+ * and that the transaction ID returned from the purchase is held in $sale_id.
+ * See PurchaseRequest for the first part of this example transaction:
+ * <code>
+ *   // Fetch the transaction so that details can be found for refund, etc.
+ *   $transaction = $gateway->fetchTransaction();
+ *   $transaction->setTransactionReference($sale_id);
+ *   $response = $transaction->send();
+ *   $data = $response->getData();
+ *   echo "Gateway fetchTransaction response data == " . print_r($data, true) . "\n";
+ * </code>
+ *
+ * @see  PurchaseRequest
+ * @see  Omnipay\Stripe\CheckoutGateway
+ * @link https://stripe.com/docs/api/checkout/sessions/retrieve
+ */
+class FetchTransactionRequest extends AbstractRequest
+{
+    public function getData()
+    {
+        $this->validate('transactionReference');
+
+        $data = [];
+
+        return $data;
+    }
+
+    public function getEndpoint()
+    {
+        return $this->endpoint.'/checkout/sessions/'. $this->getTransactionReference();
+    }
+
+    public function getHttpMethod()
+    {
+        return 'GET';
+    }
+}

src/Message/Checkout/PurchaseRequest.php

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+<?php
+
+/**
+ * Stripe Checkout Session Request.
+ */
+
+namespace Omnipay\Stripe\Message\Checkout;
+
+/**
+ * Stripe Checkout Session Request
+ *
+ * @see \Omnipay\Stripe\Gateway
+ * @link https://stripe.com/docs/api/checkout/sessions
+ */
+class PurchaseRequest extends AbstractRequest
+{
+    /**
+     * Set the success url
+     *
+     * @param string $value
+     *
+     * @return \Omnipay\Common\Message\AbstractRequest|PurchaseRequest
+     */
+    public function setSuccessUrl($value)
+    {
+        return $this->setParameter('success_url', $value);
+    }
+
+    /**
+     * Get the success url
+     *
+     * @return string
+     */
+    public function getSuccessUrl()
+    {
+        return $this->getParameter('success_url');
+    }
+    /**
+     * Set the cancel url
+     *
+     * @param string $value
+     *
+     * @return \Omnipay\Common\Message\AbstractRequest|PurchaseRequest
+     */
+    public function setCancelUrl($value)
+    {
+        return $this->setParameter('cancel_url', $value);
+    }
+
+    /**
+     * Get the success url
+     *
+     * @return string
+     */
+    public function getCancelUrl()
+    {
+        return $this->getParameter('cancel_url');
+    }
+
+    /**
+     * Set the payment method types accepted url
+     *
+     * @param array $value
+     *
+     * @return \Omnipay\Common\Message\AbstractRequest|PurchaseRequest
+     */
+    public function setPaymentMethodTypes($value)
+    {
+        return $this->setParameter('payment_method_types', $value);
+    }
+
+    /**
+     * Get the success url
+     *
+     * @return string
+     */
+    public function getPaymentMethodTypes()
+    {
+        return $this->getParameter('payment_method_types');
+    }
+
+    /**
+     * Set the payment method types accepted url
+     *
+     * @param string $value
+     *
+     * @return \Omnipay\Common\Message\AbstractRequest|PurchaseRequest
+     */
+    public function setMode($value)
+    {
+        return $this->setParameter('mode', $value);
+    }
+
+    /**
+     * Get the success url
+     *
+     * @return string
+     */
+    public function getMode()
+    {
+        return $this->getParameter('mode');
+    }
+
+    /**
+     * Set the payment method types accepted url
+     *
+     * @param array $value
+     *
+     * @return \Omnipay\Common\Message\AbstractRequest|PurchaseRequest
+     */
+    public function setLineItems($value)
+    {
+        return $this->setParameter('line_items', $value);
+    }
+
+    /**
+     * Get the success url
+     *
+     * @return array
+     */
+    public function getLineItems()
+    {
+        return $this->getParameter('line_items');
+    }
+
+    /**
+     * Set the payment method types accepted url
+     *
+     * @param string $value
+     *
+     * @return \Omnipay\Common\Message\AbstractRequest|PurchaseRequest
+     */
+    public function setClientReferenceId($value)
+    {
+        return $this->setParameter('client_reference_id', $value);
+    }
+
+    /**
+     * Get the success url
+     *
+     * @return string
+     */
+    public function getClientReferenceId()
+    {
+        return $this->getParameter('client_reference_id');
+    }
+
+
+    public function getData()
+    {
+        $data = array(
+            'success_url' => $this->getSuccessUrl(),
+            'cancel_url' => $this->getCancelUrl(),
+            'payment_method_types' => $this->getPaymentMethodTypes(),
+            'mode' => $this->getMode(),
+            'line_items' => $this->getLineItems()
+        );
+
+        return $data;
+    }
+
+    public function getEndpoint()
+    {
+        return $this->endpoint.'/checkout/sessions';
+    }
+}

tests/CheckoutGatewayTest.php

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+<?php
+
+namespace Omnipay\Stripe;
+
+use Omnipay\Tests\GatewayTestCase;
+
+/**
+ * @property \Omnipay\Stripe\CheckoutGateway gateway
+ */
+class CheckoutGatewayTest extends GatewayTestCase
+{
+    public function setUp()
+    {
+        parent::setUp();
+
+        $this->gateway = new CheckoutGateway($this->getHttpClient(), $this->getHttpRequest());
+    }
+
+    public function testPurchase()
+    {
+        $request = $this->gateway->purchase(['mode' => 'payment']);
+
+        $this->assertInstanceOf('Omnipay\Stripe\Message\Checkout\PurchaseRequest', $request);
+        $this->assertSame('payment', $request->getMode());
+    }
+
+    public function testFetchTransaction()
+    {
+        $request = $this->gateway->fetchTransaction(['transactionReference' => 'transaction-reference']);
+
+        $this->assertInstanceOf('Omnipay\Stripe\Message\Checkout\FetchTransactionRequest', $request);
+        $this->assertSame('transaction-reference', $request->getTransactionReference());
+    }
+}