Make Paypal default to the Credit Card screen instead of the Paypal login screen

civicrm-paypal-cc-screen.php

<?php /*
--------------------------------------------------------------------------------
Plugin Name: CiviCRM Paypal Credit Card Screen
Plugin URI: http://haystack.co.uk
Description: Makes Paypal default to the Credit Card screen instead of the Paypal login screen
Author: Christian Wach
Version: 0.1
Author URI: http://haystack.co.uk
Depends: CiviCRM
--------------------------------------------------------------------------------
*/

/**
 * CiviCRM Paypal Credit Card Screen Class.
 *
 * A class that encapsulates plugin functionality.
 *
 * @since 0.1
 */
class CiviCRM_Paypal_Credit_Card_Screen {

	/**
	 * Constructor.
	 *
	 * @since 0.1
	 */
	public function __construct() {

		// register hooks when CiviCRM has loaded
		add_action( 'civicrm_instance_loaded', array( $this, 'register_civi_hooks' ) );

	}

	/**
	 * Register hooks on CiviCRM init.
	 *
	 * @since 0.1
	 */
	public function register_civi_hooks() {

		// intercept CiviCRM's payment params
		add_action( 'civicrm_alterPaymentProcessorParams', array( $this, 'paypal_params' ), 10, 4 );

	}

	/**
	 * Overwrite Paypal params.
	 *
	 * @since 0.1
	 *
	 * @param object $payment_obj The instance of payment class of the payment processor invoked
	 * @param array $raw_params The associative array passed by CiviCRM to the processor
	 * @param array $cooked_params The associative array of parameters as translated into the processor's API
	 * @return void
	 */
	public function paypal_params( $payment_obj, &$raw_params, &$cooked_params ) {

		// only apply to Paypal
		if ( ! ( $payment_obj instanceof CRM_Core_Payment_PayPalImpl ) ) return;

		// get processor
		$processor = $payment_obj->getPaymentProcessor();

		// get processor type safely
		$processor_type = isset( $processor['payment_processor_type'] ) ?
						  $processor['payment_processor_type'] :
						  '';

		// bail if empty
		if ( empty( $processor_type ) ) return;

		// bail if not a Paypal processor
		if ( ! in_array( $processor_type, array( 'PayPal_Standard', 'PayPal_Express', 'PayPal' ) ) ) return;

		// clear the email address
		$cooked_params['email'] = '';

		// add landing page to params
		$cooked_params['landingpage'] = 'creditcard';

	}

} // class ends



// init plugin
global $civicrm_paypal_credit_card_screen;
$civicrm_paypal_credit_card_screen = new CiviCRM_Paypal_Credit_Card_Screen;