Add create payment token for credit card (work in progress)

modules/ppcp-api-client/src/Endpoint/class-paymenttokenendpoint.php

@@ -200,4 +200,69 @@ class PaymentTokenEndpoint {
 
 		return wp_remote_retrieve_response_code( $response ) === 204;
 	}
+
+	/**
+	 * Creates a payment token for a user.
+	 *
+	 * @param int   $customer_id The customer Id.
+	 * @param array $source The payment source.
+	 * @return PaymentToken
+	 * @throws RuntimeException If the request fails.
+	 */
+	public function create( $customer_id, $source ): PaymentToken {
+		$data = array(
+			'customer_id' => $this->prefix . $customer_id,
+			'source'      => array(
+				'card' => array(
+					'number'        => $source['credit_card_number'],
+					'expiry'        => $source['credit_card_expiry'],
+					'security_code' => $source['credit_card_cvc'],
+				),
+			),
+		);
+
+		$bearer = $this->bearer->bearer();
+		$url    = trailingslashit( $this->host ) . 'v2/vault/payment-tokens';
+		$args   = array(
+			'method'  => 'POST',
+			'headers' => array(
+				'Authorization'     => 'Bearer ' . $bearer->token(),
+				'Content-Type'      => 'application/json',
+				'PayPal-Request-Id' => uniqid( 'ppcp-', true ),
+				'body'              => wp_json_encode( $data ),
+			),
+		);
+
+		$response = $this->request( $url, $args );
+
+		if ( is_wp_error( $response ) ) {
+			$error = new RuntimeException(
+				sprintf(
+					// translators: %s is the error message.
+					__( 'Could not create payment token: %s', 'woocommerce-paypal-payments' ),
+					$response->get_error_message()
+				)
+			);
+
+			$this->logger->log( 'error', $error->getMessage() );
+			throw $error;
+		}
+
+		$json        = json_decode( $response['body'] );
+		$status_code = (int) wp_remote_retrieve_response_code( $response );
+		if ( 200 !== $status_code ) {
+			$error = new RuntimeException(
+				sprintf(
+					// translators: %s is the error message.
+					__( 'Could not create payment token: %s', 'woocommerce-paypal-payments' ),
+					$json->message
+				)
+			);
+
+			$this->logger->log( 'error', $error->getMessage() );
+			throw $error;
+		}
+
+		return $this->factory->from_paypal_response( $json );
+	}
 }

modules/ppcp-subscription/src/Repository/class-paymenttokenrepository.php

@@ -101,6 +101,22 @@ class PaymentTokenRepository {
 		return $this->endpoint->delete_token( $token );
 	}
 
+	/**
+	 * Create payment token for customer.
+	 *
+	 * @param int   $customer_id The customer Id.
+	 * @param array $source The payment source.
+	 * @return PaymentToken
+	 * @throws RuntimeException If the request fails.
+	 */
+	public function create( $customer_id, $source ): PaymentToken {
+		try {
+			return $this->endpoint->create( $customer_id, $source );
+		} catch ( RuntimeException $exception ) {
+			throw new RuntimeException( $exception->getMessage() );
+		}
+	}
+
 	/**
 	 * Fetch PaymentToken from PayPal for a user.
 	 *

modules/ppcp-subscription/src/class-subscriptionmodule.php

@@ -111,7 +111,7 @@ class SubscriptionModule implements ModuleInterface {
 			$tokens = $payment_token_repository->all_for_user_id( $subscription->get_customer_id() );
 			if ( $tokens ) {
 				$subscription_id = $subscription->get_id();
-				$latest_token_id = end( $tokens )->id() ?: '';
+				$latest_token_id = end( $tokens )->id() ? end( $tokens )->id() : '';
 				update_post_meta( $subscription_id, 'payment_token_id', $latest_token_id, true );
 			}
 		} catch ( RuntimeException $error ) {

modules/ppcp-wc-gateway/services.php

@@ -636,6 +636,7 @@ return array(
 				'type'         => 'checkbox',
 				'desc_tip'     => true,
 				'label'        => sprintf(
+					// translators: %1$s and %2$s are the opening and closing href link tags.
 					__( 'To use vaulting features, you must %1$senable vaulting on your account%2$s.', 'woocommerce-paypal-payments' ),
 					'<a 
 						href="https://docs.woocommerce.com/document/woocommerce-paypal-payments/#enable-vaulting-on-your-live-account"

modules/ppcp-wc-gateway/src/Gateway/class-processpaymenttrait.php

@@ -92,6 +92,57 @@ trait ProcessPaymentTrait {
 			}
 		}
 
+		/**
+		 * If customer has chosen change Subscription payment.
+		 */
+		if ( $this->has_subscription( $order_id ) && $this->is_subscription_change_payment() ) {
+			if ( $saved_credit_card ) {
+				update_post_meta( $order_id, 'payment_token_id', $saved_credit_card );
+
+				$this->session_handler->destroy_session_data();
+				return array(
+					'result'   => 'success',
+					'redirect' => $this->get_return_url( $wc_order ),
+				);
+			}
+
+			$credit_card_number = filter_input( INPUT_POST, 'ppcp-credit-card-gateway-card-number', FILTER_SANITIZE_STRING );
+			$credit_card_expiry = filter_input( INPUT_POST, 'ppcp-credit-card-gateway-card-expiry', FILTER_SANITIZE_STRING );
+			$credit_card_cvc    = filter_input( INPUT_POST, 'ppcp-credit-card-gateway-card-cvc', FILTER_SANITIZE_STRING );
+
+			if ( $credit_card_number && $credit_card_expiry && $credit_card_cvc ) {
+				try {
+					$token = $this->payment_token_repository->create(
+						$wc_order->get_customer_id(),
+						array(
+							'credit_card_number' => $credit_card_number,
+							'credit_card_expiry' => $credit_card_expiry,
+							'credit_card_cvc'    => $credit_card_cvc,
+						)
+					);
+
+					update_post_meta( $order_id, 'payment_token_id', $token->id() );
+
+					$this->session_handler->destroy_session_data();
+					return array(
+						'result'   => 'success',
+						'redirect' => $this->get_return_url( $wc_order ),
+					);
+				} catch ( RuntimeException $exception ) {
+					wc_add_notice(
+						$exception->getMessage(),
+						'error'
+					);
+
+					$this->session_handler->destroy_session_data();
+					return array(
+						'result'   => 'failure',
+						'redirect' => $this->get_return_url( $wc_order ),
+					);
+				}
+			}
+		}
+
 		/**
 		 * If the WC_Order is payed through the approved webhook.
 		 */
@@ -175,4 +226,25 @@ trait ProcessPaymentTrait {
 		}
 		return false;
 	}
+
+	/**
+	 * Is $order_id a subscription?
+	 *
+	 * @param  int $order_id The order Id.
+	 * @return boolean Whether order is a subscription or not.
+	 */
+	private function has_subscription( $order_id ): bool {
+		return ( function_exists( 'wcs_order_contains_subscription' ) && ( wcs_order_contains_subscription( $order_id ) || wcs_is_subscription( $order_id ) || wcs_order_contains_renewal( $order_id ) ) );
+	}
+
+	/**
+	 * Checks if page is pay for order and change subscription payment page.
+	 *
+	 * @return bool
+	 */
+	private function is_subscription_change_payment(): bool {
+		$pay_for_order         = filter_input( INPUT_GET, 'pay_for_order', FILTER_SANITIZE_STRING );
+		$change_payment_method = filter_input( INPUT_GET, 'change_payment_method', FILTER_SANITIZE_STRING );
+		return ( isset( $pay_for_order ) && isset( $change_payment_method ) );
+	}
 }