AyeCode / invoicing

includes/gateways/paypal.php

Indentation +251 added lines, -251 removed lines

@@ -218,261 +218,261 @@ 
 add_filter( 'wpinv_paypal_args', 'wpinv_get_paypal_recurring_args', 10, 3 );
 
 function wpinv_process_paypal_ipn() {
-	// Check the request method is POST
-	if ( isset( $_SERVER['REQUEST_METHOD'] ) && $_SERVER['REQUEST_METHOD'] != 'POST' ) {
-		return;
-	}
-
-	// Set initial post data to empty string
-	$post_data = '';
-
-	// Fallback just in case post_max_size is lower than needed
-	if ( ini_get( 'allow_url_fopen' ) ) {
-		$post_data = file_get_contents( 'php://input' );
-	} else {
-		// If allow_url_fopen is not enabled, then make sure that post_max_size is large enough
-		ini_set( 'post_max_size', '12M' );
-	}
-	// Start the encoded data collection with notification command
-	$encoded_data = 'cmd=_notify-validate';
-
-	// Get current arg separator
-	$arg_separator = wpinv_get_php_arg_separator_output();
-
-	// Verify there is a post_data
-	if ( $post_data || strlen( $post_data ) > 0 ) {
-		// Append the data
-		$encoded_data .= $arg_separator.$post_data;
-	} else {
-		// Check if POST is empty
-		if ( empty( $_POST ) ) {
-			// Nothing to do
-			return;
-		} else {
-			// Loop through each POST
-			foreach ( $_POST as $key => $value ) {
-				// Encode the value and append the data
-				$encoded_data .= $arg_separator."$key=" . urlencode( $value );
-			}
-		}
-	}
-
-	// Convert collected post data to an array
-	parse_str( $encoded_data, $encoded_data_array );
-
-	foreach ( $encoded_data_array as $key => $value ) {
-		if ( false !== strpos( $key, 'amp;' ) ) {
-			$new_key = str_replace( '&', '&', $key );
-			$new_key = str_replace( 'amp;', '&' , $new_key );
-
-			unset( $encoded_data_array[ $key ] );
-			$encoded_data_array[ $new_key ] = $value;
-		}
-	}
-
-	// Get the PayPal redirect uri
-	$paypal_redirect = wpinv_get_paypal_redirect( true );
-
-	if ( !wpinv_get_option( 'disable_paypal_verification', false ) ) {
-		// Validate the IPN
-
-		$remote_post_vars      = array(
-			'method'           => 'POST',
-			'timeout'          => 45,
-			'redirection'      => 5,
-			'httpversion'      => '1.1',
-			'blocking'         => true,
-			'headers'          => array(
-				'host'         => 'www.paypal.com',
-				'connection'   => 'close',
-				'content-type' => 'application/x-www-form-urlencoded',
-				'post'         => '/cgi-bin/webscr HTTP/1.1',
-
-			),
-			'sslverify'        => false,
-			'body'             => $encoded_data_array
-		);
-
-		// Get response
-		$api_response = wp_remote_post( wpinv_get_paypal_redirect(), $remote_post_vars );
-
-		if ( is_wp_error( $api_response ) ) {
-			wpinv_record_gateway_error( __( 'IPN Error', 'invoicing' ), sprintf( __( 'Invalid IPN verification response. IPN data: %s', 'invoicing' ), json_encode( $api_response ) ) );
-			return; // Something went wrong
-		}
-
-		if ( $api_response['body'] !== 'VERIFIED' && wpinv_get_option( 'disable_paypal_verification', false ) ) {
-			wpinv_record_gateway_error( __( 'IPN Error', 'invoicing' ), sprintf( __( 'Invalid IPN verification response. IPN data: %s', 'invoicing' ), json_encode( $api_response ) ) );
-			return; // Response not okay
-		}
-	}
-
-	// Check if $post_data_array has been populated
-	if ( !is_array( $encoded_data_array ) && !empty( $encoded_data_array ) )
-		return;
-
-	$defaults = array(
-		'txn_type'       => '',
-		'payment_status' => ''
-	);
-
-	$encoded_data_array = wp_parse_args( $encoded_data_array, $defaults );
-
-	$invoice_id = isset( $encoded_data_array['custom'] ) ? absint( $encoded_data_array['custom'] ) : 0;
+    // Check the request method is POST
+    if ( isset( $_SERVER['REQUEST_METHOD'] ) && $_SERVER['REQUEST_METHOD'] != 'POST' ) {
+        return;
+    }
+
+    // Set initial post data to empty string
+    $post_data = '';
+
+    // Fallback just in case post_max_size is lower than needed
+    if ( ini_get( 'allow_url_fopen' ) ) {
+        $post_data = file_get_contents( 'php://input' );
+    } else {
+        // If allow_url_fopen is not enabled, then make sure that post_max_size is large enough
+        ini_set( 'post_max_size', '12M' );
+    }
+    // Start the encoded data collection with notification command
+    $encoded_data = 'cmd=_notify-validate';
+
+    // Get current arg separator
+    $arg_separator = wpinv_get_php_arg_separator_output();
+
+    // Verify there is a post_data
+    if ( $post_data || strlen( $post_data ) > 0 ) {
+        // Append the data
+        $encoded_data .= $arg_separator.$post_data;
+    } else {
+        // Check if POST is empty
+        if ( empty( $_POST ) ) {
+            // Nothing to do
+            return;
+        } else {
+            // Loop through each POST
+            foreach ( $_POST as $key => $value ) {
+                // Encode the value and append the data
+                $encoded_data .= $arg_separator."$key=" . urlencode( $value );
+            }
+        }
+    }
+
+    // Convert collected post data to an array
+    parse_str( $encoded_data, $encoded_data_array );
+
+    foreach ( $encoded_data_array as $key => $value ) {
+        if ( false !== strpos( $key, 'amp;' ) ) {
+            $new_key = str_replace( '&', '&', $key );
+            $new_key = str_replace( 'amp;', '&' , $new_key );
+
+            unset( $encoded_data_array[ $key ] );
+            $encoded_data_array[ $new_key ] = $value;
+        }
+    }
+
+    // Get the PayPal redirect uri
+    $paypal_redirect = wpinv_get_paypal_redirect( true );
+
+    if ( !wpinv_get_option( 'disable_paypal_verification', false ) ) {
+        // Validate the IPN
+
+        $remote_post_vars      = array(
+            'method'           => 'POST',
+            'timeout'          => 45,
+            'redirection'      => 5,
+            'httpversion'      => '1.1',
+            'blocking'         => true,
+            'headers'          => array(
+                'host'         => 'www.paypal.com',
+                'connection'   => 'close',
+                'content-type' => 'application/x-www-form-urlencoded',
+                'post'         => '/cgi-bin/webscr HTTP/1.1',
+
+            ),
+            'sslverify'        => false,
+            'body'             => $encoded_data_array
+        );
+
+        // Get response
+        $api_response = wp_remote_post( wpinv_get_paypal_redirect(), $remote_post_vars );
+
+        if ( is_wp_error( $api_response ) ) {
+            wpinv_record_gateway_error( __( 'IPN Error', 'invoicing' ), sprintf( __( 'Invalid IPN verification response. IPN data: %s', 'invoicing' ), json_encode( $api_response ) ) );
+            return; // Something went wrong
+        }
+
+        if ( $api_response['body'] !== 'VERIFIED' && wpinv_get_option( 'disable_paypal_verification', false ) ) {
+            wpinv_record_gateway_error( __( 'IPN Error', 'invoicing' ), sprintf( __( 'Invalid IPN verification response. IPN data: %s', 'invoicing' ), json_encode( $api_response ) ) );
+            return; // Response not okay
+        }
+    }
+
+    // Check if $post_data_array has been populated
+    if ( !is_array( $encoded_data_array ) && !empty( $encoded_data_array ) )
+        return;
+
+    $defaults = array(
+        'txn_type'       => '',
+        'payment_status' => ''
+    );
+
+    $encoded_data_array = wp_parse_args( $encoded_data_array, $defaults );
+
+    $invoice_id = isset( $encoded_data_array['custom'] ) ? absint( $encoded_data_array['custom'] ) : 0;
     
-	wpinv_error_log( $encoded_data_array['txn_type'], 'PayPal txn_type', __FILE__, __LINE__ );
-
-	if ( has_action( 'wpinv_paypal_' . $encoded_data_array['txn_type'] ) ) {
-		// Allow PayPal IPN types to be processed separately
-		do_action( 'wpinv_paypal_' . $encoded_data_array['txn_type'], $encoded_data_array, $invoice_id );
-	} else {
-		// Fallback to web accept just in case the txn_type isn't present
-		do_action( 'wpinv_paypal_web_accept', $encoded_data_array, $invoice_id );
-	}
-	exit;
+    wpinv_error_log( $encoded_data_array['txn_type'], 'PayPal txn_type', __FILE__, __LINE__ );
+
+    if ( has_action( 'wpinv_paypal_' . $encoded_data_array['txn_type'] ) ) {
+        // Allow PayPal IPN types to be processed separately
+        do_action( 'wpinv_paypal_' . $encoded_data_array['txn_type'], $encoded_data_array, $invoice_id );
+    } else {
+        // Fallback to web accept just in case the txn_type isn't present
+        do_action( 'wpinv_paypal_web_accept', $encoded_data_array, $invoice_id );
+    }
+    exit;
 }
 add_action( 'wpinv_verify_paypal_ipn', 'wpinv_process_paypal_ipn' );
 
 function wpinv_process_paypal_web_accept_and_cart( $data, $invoice_id ) {
-	if ( $data['txn_type'] != 'web_accept' && $data['txn_type'] != 'cart' && $data['payment_status'] != 'Refunded' ) {
-		return;
-	}
-
-	if( empty( $invoice_id ) ) {
-		return;
-	}
-
-	// Collect payment details
-	$purchase_key   = isset( $data['invoice'] ) ? $data['invoice'] : $data['item_number'];
-	$paypal_amount  = $data['mc_gross'];
-	$payment_status = strtolower( $data['payment_status'] );
-	$currency_code  = strtolower( $data['mc_currency'] );
-	$business_email = isset( $data['business'] ) && is_email( $data['business'] ) ? trim( $data['business'] ) : trim( $data['receiver_email'] );
-	$payment_meta   = wpinv_get_invoice_meta( $invoice_id );
-
-	if ( wpinv_get_payment_gateway( $invoice_id ) != 'paypal' ) {
-		return; // this isn't a PayPal standard IPN
-	}
-
-	// Verify payment recipient
-	if ( strcasecmp( $business_email, trim( wpinv_get_option( 'paypal_email', false ) ) ) != 0 ) {
-		wpinv_record_gateway_error( __( 'IPN Error', 'invoicing' ), sprintf( __( 'Invalid business email in IPN response. IPN data: %s', 'invoicing' ), json_encode( $data ) ), $invoice_id );
-		wpinv_update_payment_status( $invoice_id, 'wpi-failed' );
-		wpinv_insert_payment_note( $invoice_id, __( 'Payment failed due to invalid PayPal business email.', 'invoicing' ) );
-		return;
-	}
-
-	// Verify payment currency
-	if ( $currency_code != strtolower( $payment_meta['currency'] ) ) {
-		wpinv_record_gateway_error( __( 'IPN Error', 'invoicing' ), sprintf( __( 'Invalid currency in IPN response. IPN data: %s', 'invoicing' ), json_encode( $data ) ), $invoice_id );
-		wpinv_update_payment_status( $invoice_id, 'wpi-failed' );
-		wpinv_insert_payment_note( $invoice_id, __( 'Payment failed due to invalid currency in PayPal IPN.', 'invoicing' ) );
-		return;
-	}
-
-	if ( !wpinv_get_payment_user_email( $invoice_id ) ) {
-		// This runs when a Buy Now purchase was made. It bypasses checkout so no personal info is collected until PayPal
-		// No email associated with purchase, so store from PayPal
-		wpinv_update_invoice_meta( $invoice_id, '_wpinv_email', $data['payer_email'] );
-
-		// Setup and store the customer's details
-		$user_info = array(
-			'user_id'    => '-1',
-			'email'      => sanitize_text_field( $data['payer_email'] ),
-			'first_name' => sanitize_text_field( $data['first_name'] ),
-			'last_name'  => sanitize_text_field( $data['last_name'] ),
-			'discount'   => '',
-		);
-		$user_info['address'] = ! empty( $data['address_street']       ) ? sanitize_text_field( $data['address_street'] )       : false;
-		$user_info['city']    = ! empty( $data['address_city']         ) ? sanitize_text_field( $data['address_city'] )         : false;
-		$user_info['state']   = ! empty( $data['address_state']        ) ? sanitize_text_field( $data['address_state'] )        : false;
-		$user_info['country'] = ! empty( $data['address_country_code'] ) ? sanitize_text_field( $data['address_country_code'] ) : false;
-		$user_info['zip']     = ! empty( $data['address_zip']          ) ? sanitize_text_field( $data['address_zip'] )          : false;
-
-		$payment_meta['user_info'] = $user_info;
-		wpinv_update_invoice_meta( $invoice_id, '_wpinv_payment_meta', $payment_meta );
-	}
-
-	if ( $payment_status == 'refunded' || $payment_status == 'reversed' ) {
-		// Process a refund
-		wpinv_process_paypal_refund( $data, $invoice_id );
-	} else {
-		if ( get_post_status( $invoice_id ) == 'publish' ) {
-			return; // Only paid payments once
-		}
-
-		// Retrieve the total purchase amount (before PayPal)
-		$payment_amount = wpinv_payment_total( $invoice_id );
-
-		if ( number_format( (float) $paypal_amount, 2 ) < number_format( (float) $payment_amount, 2 ) ) {
-			// The prices don't match
-			wpinv_record_gateway_error( __( 'IPN Error', 'invoicing' ), sprintf( __( 'Invalid payment amount in IPN response. IPN data: %s', 'invoicing' ), json_encode( $data ) ), $invoice_id );
-			wpinv_update_payment_status( $invoice_id, 'wpi-failed' );
-			wpinv_insert_payment_note( $invoice_id, __( 'Payment failed due to invalid amount in PayPal IPN.', 'invoicing' ) );
-			return;
-		}
-		if ( $purchase_key != wpinv_get_payment_key( $invoice_id ) ) {
-			// Purchase keys don't match
-			wpinv_record_gateway_error( __( 'IPN Error', 'invoicing' ), sprintf( __( 'Invalid purchase key in IPN response. IPN data: %s', 'invoicing' ), json_encode( $data ) ), $invoice_id );
-			wpinv_update_payment_status( $invoice_id, 'wpi-failed' );
-			wpinv_insert_payment_note( $invoice_id, __( 'Payment failed due to invalid purchase key in PayPal IPN.', 'invoicing' ) );
-			return;
-		}
-
-		if ( 'complete' == $payment_status || 'completed' == $payment_status || 'processed' == $payment_status || wpinv_is_test_mode( 'paypal' ) ) {
-			wpinv_insert_payment_note( $invoice_id, sprintf( __( 'PayPal Transaction ID: %s', 'invoicing' ) , $data['txn_id'] ) );
-			wpinv_set_payment_transaction_id( $invoice_id, $data['txn_id'] );
-			wpinv_update_payment_status( $invoice_id, 'publish' );
-		} else if ( 'wpi-pending' == $payment_status && isset( $data['pending_reason'] ) ) {
-			// Look for possible pending reasons, such as an echeck
-			$note = '';
-
-			switch( strtolower( $data['pending_reason'] ) ) {
-				case 'echeck' :
-					$note = __( 'Payment made via eCheck and will clear automatically in 5-8 days', 'invoicing' );
-					break;
+    if ( $data['txn_type'] != 'web_accept' && $data['txn_type'] != 'cart' && $data['payment_status'] != 'Refunded' ) {
+        return;
+    }
+
+    if( empty( $invoice_id ) ) {
+        return;
+    }
+
+    // Collect payment details
+    $purchase_key   = isset( $data['invoice'] ) ? $data['invoice'] : $data['item_number'];
+    $paypal_amount  = $data['mc_gross'];
+    $payment_status = strtolower( $data['payment_status'] );
+    $currency_code  = strtolower( $data['mc_currency'] );
+    $business_email = isset( $data['business'] ) && is_email( $data['business'] ) ? trim( $data['business'] ) : trim( $data['receiver_email'] );
+    $payment_meta   = wpinv_get_invoice_meta( $invoice_id );
+
+    if ( wpinv_get_payment_gateway( $invoice_id ) != 'paypal' ) {
+        return; // this isn't a PayPal standard IPN
+    }
+
+    // Verify payment recipient
+    if ( strcasecmp( $business_email, trim( wpinv_get_option( 'paypal_email', false ) ) ) != 0 ) {
+        wpinv_record_gateway_error( __( 'IPN Error', 'invoicing' ), sprintf( __( 'Invalid business email in IPN response. IPN data: %s', 'invoicing' ), json_encode( $data ) ), $invoice_id );
+        wpinv_update_payment_status( $invoice_id, 'wpi-failed' );
+        wpinv_insert_payment_note( $invoice_id, __( 'Payment failed due to invalid PayPal business email.', 'invoicing' ) );
+        return;
+    }
+
+    // Verify payment currency
+    if ( $currency_code != strtolower( $payment_meta['currency'] ) ) {
+        wpinv_record_gateway_error( __( 'IPN Error', 'invoicing' ), sprintf( __( 'Invalid currency in IPN response. IPN data: %s', 'invoicing' ), json_encode( $data ) ), $invoice_id );
+        wpinv_update_payment_status( $invoice_id, 'wpi-failed' );
+        wpinv_insert_payment_note( $invoice_id, __( 'Payment failed due to invalid currency in PayPal IPN.', 'invoicing' ) );
+        return;
+    }
+
+    if ( !wpinv_get_payment_user_email( $invoice_id ) ) {
+        // This runs when a Buy Now purchase was made. It bypasses checkout so no personal info is collected until PayPal
+        // No email associated with purchase, so store from PayPal
+        wpinv_update_invoice_meta( $invoice_id, '_wpinv_email', $data['payer_email'] );
+
+        // Setup and store the customer's details
+        $user_info = array(
+            'user_id'    => '-1',
+            'email'      => sanitize_text_field( $data['payer_email'] ),
+            'first_name' => sanitize_text_field( $data['first_name'] ),
+            'last_name'  => sanitize_text_field( $data['last_name'] ),
+            'discount'   => '',
+        );
+        $user_info['address'] = ! empty( $data['address_street']       ) ? sanitize_text_field( $data['address_street'] )       : false;
+        $user_info['city']    = ! empty( $data['address_city']         ) ? sanitize_text_field( $data['address_city'] )         : false;
+        $user_info['state']   = ! empty( $data['address_state']        ) ? sanitize_text_field( $data['address_state'] )        : false;
+        $user_info['country'] = ! empty( $data['address_country_code'] ) ? sanitize_text_field( $data['address_country_code'] ) : false;
+        $user_info['zip']     = ! empty( $data['address_zip']          ) ? sanitize_text_field( $data['address_zip'] )          : false;
+
+        $payment_meta['user_info'] = $user_info;
+        wpinv_update_invoice_meta( $invoice_id, '_wpinv_payment_meta', $payment_meta );
+    }
+
+    if ( $payment_status == 'refunded' || $payment_status == 'reversed' ) {
+        // Process a refund
+        wpinv_process_paypal_refund( $data, $invoice_id );
+    } else {
+        if ( get_post_status( $invoice_id ) == 'publish' ) {
+            return; // Only paid payments once
+        }
+
+        // Retrieve the total purchase amount (before PayPal)
+        $payment_amount = wpinv_payment_total( $invoice_id );
+
+        if ( number_format( (float) $paypal_amount, 2 ) < number_format( (float) $payment_amount, 2 ) ) {
+            // The prices don't match
+            wpinv_record_gateway_error( __( 'IPN Error', 'invoicing' ), sprintf( __( 'Invalid payment amount in IPN response. IPN data: %s', 'invoicing' ), json_encode( $data ) ), $invoice_id );
+            wpinv_update_payment_status( $invoice_id, 'wpi-failed' );
+            wpinv_insert_payment_note( $invoice_id, __( 'Payment failed due to invalid amount in PayPal IPN.', 'invoicing' ) );
+            return;
+        }
+        if ( $purchase_key != wpinv_get_payment_key( $invoice_id ) ) {
+            // Purchase keys don't match
+            wpinv_record_gateway_error( __( 'IPN Error', 'invoicing' ), sprintf( __( 'Invalid purchase key in IPN response. IPN data: %s', 'invoicing' ), json_encode( $data ) ), $invoice_id );
+            wpinv_update_payment_status( $invoice_id, 'wpi-failed' );
+            wpinv_insert_payment_note( $invoice_id, __( 'Payment failed due to invalid purchase key in PayPal IPN.', 'invoicing' ) );
+            return;
+        }
+
+        if ( 'complete' == $payment_status || 'completed' == $payment_status || 'processed' == $payment_status || wpinv_is_test_mode( 'paypal' ) ) {
+            wpinv_insert_payment_note( $invoice_id, sprintf( __( 'PayPal Transaction ID: %s', 'invoicing' ) , $data['txn_id'] ) );
+            wpinv_set_payment_transaction_id( $invoice_id, $data['txn_id'] );
+            wpinv_update_payment_status( $invoice_id, 'publish' );
+        } else if ( 'wpi-pending' == $payment_status && isset( $data['pending_reason'] ) ) {
+            // Look for possible pending reasons, such as an echeck
+            $note = '';
+
+            switch( strtolower( $data['pending_reason'] ) ) {
+                case 'echeck' :
+                    $note = __( 'Payment made via eCheck and will clear automatically in 5-8 days', 'invoicing' );
+                    break;
 				
                 case 'address' :
-					$note = __( 'Payment requires a confirmed customer address and must be accepted manually through PayPal', 'invoicing' );
-					break;
+                    $note = __( 'Payment requires a confirmed customer address and must be accepted manually through PayPal', 'invoicing' );
+                    break;
 				
                 case 'intl' :
-					$note = __( 'Payment must be accepted manually through PayPal due to international account regulations', 'invoicing' );
-					break;
+                    $note = __( 'Payment must be accepted manually through PayPal due to international account regulations', 'invoicing' );
+                    break;
 				
                 case 'multi-currency' :
-					$note = __( 'Payment received in non-shop currency and must be accepted manually through PayPal', 'invoicing' );
-					break;
+                    $note = __( 'Payment received in non-shop currency and must be accepted manually through PayPal', 'invoicing' );
+                    break;
 				
                 case 'paymentreview' :
                 case 'regulatory_review' :
-					$note = __( 'Payment is being reviewed by PayPal staff as high-risk or in possible violation of government regulations', 'invoicing' );
-					break;
+                    $note = __( 'Payment is being reviewed by PayPal staff as high-risk or in possible violation of government regulations', 'invoicing' );
+                    break;
 				
                 case 'unilateral' :
-					$note = __( 'Payment was sent to non-confirmed or non-registered email address.', 'invoicing' );
-					break;
+                    $note = __( 'Payment was sent to non-confirmed or non-registered email address.', 'invoicing' );
+                    break;
 				
                 case 'upgrade' :
-					$note = __( 'PayPal account must be upgraded before this payment can be accepted', 'invoicing' );
-					break;
+                    $note = __( 'PayPal account must be upgraded before this payment can be accepted', 'invoicing' );
+                    break;
 				
                 case 'verify' :
-					$note = __( 'PayPal account is not verified. Verify account in order to accept this payment', 'invoicing' );
-					break;
-
-				case 'other' :
-					$note = __( 'Payment is pending for unknown reasons. Contact PayPal support for assistance', 'invoicing' );
-					break;
-			}
-
-			if ( ! empty( $note ) ) {
-				wpinv_insert_payment_note( $invoice_id, $note );
-			}
-		} else {
-			wpinv_insert_payment_note( $invoice_id, wp_sprintf( __( 'PayPal IPN has been received with invalid payment status: %s', 'invoicing' ), $payment_status ) );
-		}
-	}
+                    $note = __( 'PayPal account is not verified. Verify account in order to accept this payment', 'invoicing' );
+                    break;
+
+                case 'other' :
+                    $note = __( 'Payment is pending for unknown reasons. Contact PayPal support for assistance', 'invoicing' );
+                    break;
+            }
+
+            if ( ! empty( $note ) ) {
+                wpinv_insert_payment_note( $invoice_id, $note );
+            }
+        } else {
+            wpinv_insert_payment_note( $invoice_id, wp_sprintf( __( 'PayPal IPN has been received with invalid payment status: %s', 'invoicing' ), $payment_status ) );
+        }
+    }
 }
 add_action( 'wpinv_paypal_web_accept', 'wpinv_process_paypal_web_accept_and_cart', 10, 2 );
 
@@ -687,27 +687,27 @@ 
 }
 
 function wpinv_process_paypal_refund( $data, $invoice_id = 0 ) {
-	// Collect payment details
+    // Collect payment details
 
-	if( empty( $invoice_id ) ) {
-		return;
-	}
+    if( empty( $invoice_id ) ) {
+        return;
+    }
 
-	if ( get_post_status( $invoice_id ) == 'wpi-refunded' ) {
-		return; // Only refund payments once
-	}
+    if ( get_post_status( $invoice_id ) == 'wpi-refunded' ) {
+        return; // Only refund payments once
+    }
 
-	$payment_amount = wpinv_payment_total( $invoice_id );
-	$refund_amount  = $data['mc_gross'] * -1;
+    $payment_amount = wpinv_payment_total( $invoice_id );
+    $refund_amount  = $data['mc_gross'] * -1;
 
-	if ( number_format( (float) $refund_amount, 2 ) < number_format( (float) $payment_amount, 2 ) ) {
-		wpinv_insert_payment_note( $invoice_id, sprintf( __( 'Partial PayPal refund processed: %s', 'invoicing' ), $data['parent_txn_id'] ) );
-		return; // This is a partial refund
-	}
+    if ( number_format( (float) $refund_amount, 2 ) < number_format( (float) $payment_amount, 2 ) ) {
+        wpinv_insert_payment_note( $invoice_id, sprintf( __( 'Partial PayPal refund processed: %s', 'invoicing' ), $data['parent_txn_id'] ) );
+        return; // This is a partial refund
+    }
 
-	wpinv_insert_payment_note( $invoice_id, sprintf( __( 'PayPal Payment #%s Refunded for reason: %s', 'invoicing' ), $data['parent_txn_id'], $data['reason_code'] ) );
-	wpinv_insert_payment_note( $invoice_id, sprintf( __( 'PayPal Refund Transaction ID: %s', 'invoicing' ), $data['txn_id'] ) );
-	wpinv_update_payment_status( $invoice_id, 'wpi-refunded' );
+    wpinv_insert_payment_note( $invoice_id, sprintf( __( 'PayPal Payment #%s Refunded for reason: %s', 'invoicing' ), $data['parent_txn_id'], $data['reason_code'] ) );
+    wpinv_insert_payment_note( $invoice_id, sprintf( __( 'PayPal Refund Transaction ID: %s', 'invoicing' ), $data['txn_id'] ) );
+    wpinv_update_payment_status( $invoice_id, 'wpi-refunded' );
 }
 
 function wpinv_get_paypal_redirect( $ssl_check = false ) {