AyeCode / invoicing

includes/gateways/class-getpaid-paypal-api.php

Indentation +214 added lines, -214 removed lines

@@ -10,227 +10,227 @@
  */
 class GetPaid_PayPal_API {
 
-	/**
-	 * Retrieves the bearer token.
-	 *
+    /**
+     * Retrieves the bearer token.
+     *
      * @return string|\WP_Error
-	 */
-	public static function get_token( $mode = 'live' ) {
+     */
+    public static function get_token( $mode = 'live' ) {
 
-		$token = get_transient( 'getpaid_paypal_' . $mode . '_token' );
+        $token = get_transient( 'getpaid_paypal_' . $mode . '_token' );
 
-		if ( $token ) {
-			return $token;
-		}
+        if ( $token ) {
+            return $token;
+        }
 
-		$client_id  = 'live' === $mode ? wpinv_get_option( 'paypal_client_id' ) : wpinv_get_option( 'paypal_sandbox_client_id' );
-		$secret_key = 'live' === $mode ? wpinv_get_option( 'paypal_secret' ) : wpinv_get_option( 'paypal_sandbox_secret' );
-		$url        = self::get_api_url( 'v1/oauth2/token?grant_type=client_credentials', $mode );
+        $client_id  = 'live' === $mode ? wpinv_get_option( 'paypal_client_id' ) : wpinv_get_option( 'paypal_sandbox_client_id' );
+        $secret_key = 'live' === $mode ? wpinv_get_option( 'paypal_secret' ) : wpinv_get_option( 'paypal_sandbox_secret' );
+        $url        = self::get_api_url( 'v1/oauth2/token?grant_type=client_credentials', $mode );
 
         if ( empty( $client_id ) || empty( $secret_key ) ) {
             return new \WP_Error( 'invalid_request', 'Missing client id or secret key.', array( 'status' => 400 ) );
         }
 
-		$args   = array(
-			'method'  => 'POST',
-			'timeout' => 30,
-			'headers' => array(
-				'Authorization' => 'Basic ' . base64_encode( $client_id . ':' . $secret_key ), // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_encode
-				'Accept'        => 'application/json',
-				'Content-Type'  => 'application/x-www-form-urlencoded',
-			),
-		);
-
-		$response = self::response_or_error( wp_remote_post( $url, $args ) );
-
-		if ( is_wp_error( $response ) ) {
-			return $response;
-		}
-
-		if ( ! isset( $response->access_token ) ) {
-			return new \WP_Error( 'invalid_request', 'Could not create token.', array( 'status' => 400 ) );
-		}
-
-		set_transient( 'getpaid_paypal_' . $mode . '_token', $response->access_token, $response->expires_in - 600 );
-		return $response->access_token;
-	}
-
-	/**
-	 * Retrieves the PayPal API URL.
-	 *
-	 * @param string $endpoint
-	 * @return string
-	 */
-	public static function get_api_url( $endpoint = '', $mode = 'live'  ) {
-		$endpoint = ltrim( $endpoint, '/' );
-		return 'live' === $mode ? 'https://api-m.paypal.com/' . $endpoint : 'https://api-m.sandbox.paypal.com/' . $endpoint;
-	}
-
-	/**
-	 * Handles a post request.
-	 *
-	 * @param string $path The path to the endpoint.
-	 * @param mixed $data The data to send.
-	 * @param string $method The method to use.
-	 *
-	 * @return true|\WP_Error
-	 */
-	public static function post( $path, $data, $mode = 'live', $method = 'POST' ) {
-
-		$access_token = self::get_token( $mode );
-
-		if ( is_wp_error( $access_token ) ) {
-			return $access_token;
-		}
-
-		$url  = self::get_api_url( $path, $mode );
-		$args = array(
-			'method'  => $method,
-			'headers' => array(
-				'Authorization' => 'Bearer ' . $access_token,
-				'Content-Type'  => 'application/json',
-			),
-		);
-
-		if( ! empty( $data )) {
-			$args['body'] = wp_json_encode( $data );
-		}
-
-		return self::response_or_error( wp_remote_post( $url, $args ) );
-	}
-
-	/**
-	 * Handles a get request.
-	 *
-	 * @param string $path The path to the endpoint.
-	 * @param string $method
-	 * @return object|\WP_Error
-	 */
-	public static function get( $path, $mode = 'live', $method = 'GET' ) {
-
-		$access_token = self::get_token( $mode );
-
-		if ( is_wp_error( $access_token ) ) {
-			return $access_token;
-		}
-
-		$url  = self::get_api_url( $path, $mode );
-		$args = array(
-			'method'  => $method,
-			'headers' => array(
-				'Authorization' => 'Bearer ' . $access_token,
-			),
-		);
-
-		return self::response_or_error( wp_remote_get( $url, $args ) );
-	}
-
-	/**
-	 * Returns the response body
-	 *
-	 * @since 1.0.0
-	 * @version 1.0.0
-	 * @param \WP_Error|array $response
-	 * @return \WP_Error|object
-	 */
-	public static function response_or_error( $response ) {
-
-		if ( is_wp_error( $response ) ) {
-			return new \WP_Error( 'paypal_error', __( 'There was a problem connecting to the PayPal API endpoint.', 'invoicing' ) );
-		}
-
-		if ( empty( $response['body'] ) ) {
-			return true;
-		}
-
-		$response_body = json_decode( wp_remote_retrieve_body( $response ) );
-
-		if ( wp_remote_retrieve_response_code( $response ) > 299 ) {
-
-			// Normal errors.
-			if ( $response_body && isset( $response_body->message ) ) {
-				$error_message = $response_body->message;
-
-			// Identity errors.
-			} elseif ( $response_body && isset( $response_body->error_description ) ) {
-				$error_message = $response_body->error_description;
-				return new \WP_Error( 'paypal_error', wp_kses_post( $response_body->error_description ) );
-			} else {
-				$error_message = __( 'There was an error connecting to the PayPal API endpoint.', 'invoicing' );
-			}
-
-			return new \WP_Error( 'paypal_error', $error_message );
-		}
-
-		return $response_body;
-	}
-
-	/**
-	 * Fetches an order.
-	 *
-	 * @since 1.0.0
-	 * @version 1.0.0
-	 * @param string $order_id
-	 * @link https://developer.paypal.com/docs/api/orders/v2/#orders_get
-	 * @return \WP_Error|object
-	 */
-	public static function get_order( $order_id, $mode = 'live' ) {
-		return self::get( '/v2/checkout/orders/' . $order_id, $mode );
-	}
-
-	/**
-	 * Fetches a subscription.
-	 *
-	 * @since 1.0.0
-	 * @version 1.0.0
-	 * @param string $subscription_id
-	 * @link https://developer.paypal.com/docs/api/subscriptions/v1/#subscriptions_get
-	 * @return \WP_Error|object
-	 */
-	public static function get_subscription( $subscription_id, $mode = 'live' ) {
-		return self::get( '/v1/billing/subscriptions/' . $subscription_id, $mode );
-	}
-
-	/**
-	 * Fetches a subscription's latest transactions (limits search to last one day).
-	 *
-	 * @since 1.0.0
-	 * @version 1.0.0
-	 * @param string $subscription_id
-	 * @link https://developer.paypal.com/docs/api/subscriptions/v1/#subscriptions_transactions
-	 * @return \WP_Error|object
-	 */
-	public static function get_subscription_transaction( $subscription_id, $mode = 'live' ) {
-		$start_time = gmdate( 'Y-m-d\TH:i:s\Z', strtotime( '-1 day' ) );
-		$end_time   = gmdate( 'Y-m-d\TH:i:s\Z' );
-		return self::get( "/v1/billing/subscriptions/$subscription_id/transactions?start_time=$start_time&end_time=$end_time", $mode );
-	}
-
-	/**
-	 * Refunds a capture.
-	 *
-	 * @since 1.0.0
-	 * @version 1.0.0
-	 * @param string $capture_id
-	 * @param array  $args
-	 * @link https://developer.paypal.com/docs/api/payments/v2/#captures_refund
-	 * @return \WP_Error|object
-	 */
-	public static function refund_capture( $capture_id, $args = array(), $mode = 'live' ) {
-		return self::post( '/v2/payments/captures/' . $capture_id . '/refund', $args, $mode );
-	}
-
-	/**
-	 * Cancels a subscription.
-	 *
-	 * @since 2.8.24
-	 * @version 2.8.24
-	 * @param string $subscription_id
-	 * @param array  $args
-	 * @link https://developer.paypal.com/docs/api/subscriptions/v1/#subscriptions_cancel
-	 * @return \WP_Error|object
-	 */
-	public static function cancel_subscription( $subscription_id, $args = array(), $mode = 'live' ) {
-		return self::post( '/v1/billing/subscriptions/' . $subscription_id . '/cancel', $args, $mode );
-	}
+        $args   = array(
+            'method'  => 'POST',
+            'timeout' => 30,
+            'headers' => array(
+                'Authorization' => 'Basic ' . base64_encode( $client_id . ':' . $secret_key ), // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_encode
+                'Accept'        => 'application/json',
+                'Content-Type'  => 'application/x-www-form-urlencoded',
+            ),
+        );
+
+        $response = self::response_or_error( wp_remote_post( $url, $args ) );
+
+        if ( is_wp_error( $response ) ) {
+            return $response;
+        }
+
+        if ( ! isset( $response->access_token ) ) {
+            return new \WP_Error( 'invalid_request', 'Could not create token.', array( 'status' => 400 ) );
+        }
+
+        set_transient( 'getpaid_paypal_' . $mode . '_token', $response->access_token, $response->expires_in - 600 );
+        return $response->access_token;
+    }
+
+    /**
+     * Retrieves the PayPal API URL.
+     *
+     * @param string $endpoint
+     * @return string
+     */
+    public static function get_api_url( $endpoint = '', $mode = 'live'  ) {
+        $endpoint = ltrim( $endpoint, '/' );
+        return 'live' === $mode ? 'https://api-m.paypal.com/' . $endpoint : 'https://api-m.sandbox.paypal.com/' . $endpoint;
+    }
+
+    /**
+     * Handles a post request.
+     *
+     * @param string $path The path to the endpoint.
+     * @param mixed $data The data to send.
+     * @param string $method The method to use.
+     *
+     * @return true|\WP_Error
+     */
+    public static function post( $path, $data, $mode = 'live', $method = 'POST' ) {
+
+        $access_token = self::get_token( $mode );
+
+        if ( is_wp_error( $access_token ) ) {
+            return $access_token;
+        }
+
+        $url  = self::get_api_url( $path, $mode );
+        $args = array(
+            'method'  => $method,
+            'headers' => array(
+                'Authorization' => 'Bearer ' . $access_token,
+                'Content-Type'  => 'application/json',
+            ),
+        );
+
+        if( ! empty( $data )) {
+            $args['body'] = wp_json_encode( $data );
+        }
+
+        return self::response_or_error( wp_remote_post( $url, $args ) );
+    }
+
+    /**
+     * Handles a get request.
+     *
+     * @param string $path The path to the endpoint.
+     * @param string $method
+     * @return object|\WP_Error
+     */
+    public static function get( $path, $mode = 'live', $method = 'GET' ) {
+
+        $access_token = self::get_token( $mode );
+
+        if ( is_wp_error( $access_token ) ) {
+            return $access_token;
+        }
+
+        $url  = self::get_api_url( $path, $mode );
+        $args = array(
+            'method'  => $method,
+            'headers' => array(
+                'Authorization' => 'Bearer ' . $access_token,
+            ),
+        );
+
+        return self::response_or_error( wp_remote_get( $url, $args ) );
+    }
+
+    /**
+     * Returns the response body
+     *
+     * @since 1.0.0
+     * @version 1.0.0
+     * @param \WP_Error|array $response
+     * @return \WP_Error|object
+     */
+    public static function response_or_error( $response ) {
+
+        if ( is_wp_error( $response ) ) {
+            return new \WP_Error( 'paypal_error', __( 'There was a problem connecting to the PayPal API endpoint.', 'invoicing' ) );
+        }
+
+        if ( empty( $response['body'] ) ) {
+            return true;
+        }
+
+        $response_body = json_decode( wp_remote_retrieve_body( $response ) );
+
+        if ( wp_remote_retrieve_response_code( $response ) > 299 ) {
+
+            // Normal errors.
+            if ( $response_body && isset( $response_body->message ) ) {
+                $error_message = $response_body->message;
+
+            // Identity errors.
+            } elseif ( $response_body && isset( $response_body->error_description ) ) {
+                $error_message = $response_body->error_description;
+                return new \WP_Error( 'paypal_error', wp_kses_post( $response_body->error_description ) );
+            } else {
+                $error_message = __( 'There was an error connecting to the PayPal API endpoint.', 'invoicing' );
+            }
+
+            return new \WP_Error( 'paypal_error', $error_message );
+        }
+
+        return $response_body;
+    }
+
+    /**
+     * Fetches an order.
+     *
+     * @since 1.0.0
+     * @version 1.0.0
+     * @param string $order_id
+     * @link https://developer.paypal.com/docs/api/orders/v2/#orders_get
+     * @return \WP_Error|object
+     */
+    public static function get_order( $order_id, $mode = 'live' ) {
+        return self::get( '/v2/checkout/orders/' . $order_id, $mode );
+    }
+
+    /**
+     * Fetches a subscription.
+     *
+     * @since 1.0.0
+     * @version 1.0.0
+     * @param string $subscription_id
+     * @link https://developer.paypal.com/docs/api/subscriptions/v1/#subscriptions_get
+     * @return \WP_Error|object
+     */
+    public static function get_subscription( $subscription_id, $mode = 'live' ) {
+        return self::get( '/v1/billing/subscriptions/' . $subscription_id, $mode );
+    }
+
+    /**
+     * Fetches a subscription's latest transactions (limits search to last one day).
+     *
+     * @since 1.0.0
+     * @version 1.0.0
+     * @param string $subscription_id
+     * @link https://developer.paypal.com/docs/api/subscriptions/v1/#subscriptions_transactions
+     * @return \WP_Error|object
+     */
+    public static function get_subscription_transaction( $subscription_id, $mode = 'live' ) {
+        $start_time = gmdate( 'Y-m-d\TH:i:s\Z', strtotime( '-1 day' ) );
+        $end_time   = gmdate( 'Y-m-d\TH:i:s\Z' );
+        return self::get( "/v1/billing/subscriptions/$subscription_id/transactions?start_time=$start_time&end_time=$end_time", $mode );
+    }
+
+    /**
+     * Refunds a capture.
+     *
+     * @since 1.0.0
+     * @version 1.0.0
+     * @param string $capture_id
+     * @param array  $args
+     * @link https://developer.paypal.com/docs/api/payments/v2/#captures_refund
+     * @return \WP_Error|object
+     */
+    public static function refund_capture( $capture_id, $args = array(), $mode = 'live' ) {
+        return self::post( '/v2/payments/captures/' . $capture_id . '/refund', $args, $mode );
+    }
+
+    /**
+     * Cancels a subscription.
+     *
+     * @since 2.8.24
+     * @version 2.8.24
+     * @param string $subscription_id
+     * @param array  $args
+     * @link https://developer.paypal.com/docs/api/subscriptions/v1/#subscriptions_cancel
+     * @return \WP_Error|object
+     */
+    public static function cancel_subscription( $subscription_id, $args = array(), $mode = 'live' ) {
+        return self::post( '/v1/billing/subscriptions/' . $subscription_id . '/cancel', $args, $mode );
+    }
 }

Spacing +53 added lines, -53 removed lines

@@ -1,7 +1,7 @@ 
 <?php
 
 // Exit if accessed directly.
-defined( 'ABSPATH' ) || exit;
+defined('ABSPATH') || exit;
 
 /**
  * PayPal API handler.
@@ -15,43 +15,43 @@ 
 	 *
      * @return string|\WP_Error
 	 */
-	public static function get_token( $mode = 'live' ) {
+	public static function get_token($mode = 'live') {
 
-		$token = get_transient( 'getpaid_paypal_' . $mode . '_token' );
+		$token = get_transient('getpaid_paypal_' . $mode . '_token');
 
-		if ( $token ) {
+		if ($token) {
 			return $token;
 		}
 
-		$client_id  = 'live' === $mode ? wpinv_get_option( 'paypal_client_id' ) : wpinv_get_option( 'paypal_sandbox_client_id' );
-		$secret_key = 'live' === $mode ? wpinv_get_option( 'paypal_secret' ) : wpinv_get_option( 'paypal_sandbox_secret' );
-		$url        = self::get_api_url( 'v1/oauth2/token?grant_type=client_credentials', $mode );
+		$client_id  = 'live' === $mode ? wpinv_get_option('paypal_client_id') : wpinv_get_option('paypal_sandbox_client_id');
+		$secret_key = 'live' === $mode ? wpinv_get_option('paypal_secret') : wpinv_get_option('paypal_sandbox_secret');
+		$url        = self::get_api_url('v1/oauth2/token?grant_type=client_credentials', $mode);
 
-        if ( empty( $client_id ) || empty( $secret_key ) ) {
-            return new \WP_Error( 'invalid_request', 'Missing client id or secret key.', array( 'status' => 400 ) );
+        if (empty($client_id) || empty($secret_key)) {
+            return new \WP_Error('invalid_request', 'Missing client id or secret key.', array('status' => 400));
         }
 
-		$args   = array(
+		$args = array(
 			'method'  => 'POST',
 			'timeout' => 30,
 			'headers' => array(
-				'Authorization' => 'Basic ' . base64_encode( $client_id . ':' . $secret_key ), // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_encode
+				'Authorization' => 'Basic ' . base64_encode($client_id . ':' . $secret_key), // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_encode
 				'Accept'        => 'application/json',
 				'Content-Type'  => 'application/x-www-form-urlencoded',
 			),
 		);
 
-		$response = self::response_or_error( wp_remote_post( $url, $args ) );
+		$response = self::response_or_error(wp_remote_post($url, $args));
 
-		if ( is_wp_error( $response ) ) {
+		if (is_wp_error($response)) {
 			return $response;
 		}
 
-		if ( ! isset( $response->access_token ) ) {
-			return new \WP_Error( 'invalid_request', 'Could not create token.', array( 'status' => 400 ) );
+		if (!isset($response->access_token)) {
+			return new \WP_Error('invalid_request', 'Could not create token.', array('status' => 400));
 		}
 
-		set_transient( 'getpaid_paypal_' . $mode . '_token', $response->access_token, $response->expires_in - 600 );
+		set_transient('getpaid_paypal_' . $mode . '_token', $response->access_token, $response->expires_in - 600);
 		return $response->access_token;
 	}
 
@@ -61,8 +61,8 @@ 
 	 * @param string $endpoint
 	 * @return string
 	 */
-	public static function get_api_url( $endpoint = '', $mode = 'live'  ) {
-		$endpoint = ltrim( $endpoint, '/' );
+	public static function get_api_url($endpoint = '', $mode = 'live') {
+		$endpoint = ltrim($endpoint, '/');
 		return 'live' === $mode ? 'https://api-m.paypal.com/' . $endpoint : 'https://api-m.sandbox.paypal.com/' . $endpoint;
 	}
 
@@ -75,15 +75,15 @@ 
 	 *
 	 * @return true|\WP_Error
 	 */
-	public static function post( $path, $data, $mode = 'live', $method = 'POST' ) {
+	public static function post($path, $data, $mode = 'live', $method = 'POST') {
 
-		$access_token = self::get_token( $mode );
+		$access_token = self::get_token($mode);
 
-		if ( is_wp_error( $access_token ) ) {
+		if (is_wp_error($access_token)) {
 			return $access_token;
 		}
 
-		$url  = self::get_api_url( $path, $mode );
+		$url  = self::get_api_url($path, $mode);
 		$args = array(
 			'method'  => $method,
 			'headers' => array(
@@ -92,11 +92,11 @@ 
 			),
 		);
 
-		if( ! empty( $data )) {
-			$args['body'] = wp_json_encode( $data );
+		if (!empty($data)) {
+			$args['body'] = wp_json_encode($data);
 		}
 
-		return self::response_or_error( wp_remote_post( $url, $args ) );
+		return self::response_or_error(wp_remote_post($url, $args));
 	}
 
 	/**
@@ -106,15 +106,15 @@ 
 	 * @param string $method
 	 * @return object|\WP_Error
 	 */
-	public static function get( $path, $mode = 'live', $method = 'GET' ) {
+	public static function get($path, $mode = 'live', $method = 'GET') {
 
-		$access_token = self::get_token( $mode );
+		$access_token = self::get_token($mode);
 
-		if ( is_wp_error( $access_token ) ) {
+		if (is_wp_error($access_token)) {
 			return $access_token;
 		}
 
-		$url  = self::get_api_url( $path, $mode );
+		$url  = self::get_api_url($path, $mode);
 		$args = array(
 			'method'  => $method,
 			'headers' => array(
@@ -122,7 +122,7 @@ 
 			),
 		);
 
-		return self::response_or_error( wp_remote_get( $url, $args ) );
+		return self::response_or_error(wp_remote_get($url, $args));
 	}
 
 	/**
@@ -133,33 +133,33 @@ 
 	 * @param \WP_Error|array $response
 	 * @return \WP_Error|object
 	 */
-	public static function response_or_error( $response ) {
+	public static function response_or_error($response) {
 
-		if ( is_wp_error( $response ) ) {
-			return new \WP_Error( 'paypal_error', __( 'There was a problem connecting to the PayPal API endpoint.', 'invoicing' ) );
+		if (is_wp_error($response)) {
+			return new \WP_Error('paypal_error', __('There was a problem connecting to the PayPal API endpoint.', 'invoicing'));
 		}
 
-		if ( empty( $response['body'] ) ) {
+		if (empty($response['body'])) {
 			return true;
 		}
 
-		$response_body = json_decode( wp_remote_retrieve_body( $response ) );
+		$response_body = json_decode(wp_remote_retrieve_body($response));
 
-		if ( wp_remote_retrieve_response_code( $response ) > 299 ) {
+		if (wp_remote_retrieve_response_code($response) > 299) {
 
 			// Normal errors.
-			if ( $response_body && isset( $response_body->message ) ) {
+			if ($response_body && isset($response_body->message)) {
 				$error_message = $response_body->message;
 
 			// Identity errors.
-			} elseif ( $response_body && isset( $response_body->error_description ) ) {
+			} elseif ($response_body && isset($response_body->error_description)) {
 				$error_message = $response_body->error_description;
-				return new \WP_Error( 'paypal_error', wp_kses_post( $response_body->error_description ) );
+				return new \WP_Error('paypal_error', wp_kses_post($response_body->error_description));
 			} else {
-				$error_message = __( 'There was an error connecting to the PayPal API endpoint.', 'invoicing' );
+				$error_message = __('There was an error connecting to the PayPal API endpoint.', 'invoicing');
 			}
 
-			return new \WP_Error( 'paypal_error', $error_message );
+			return new \WP_Error('paypal_error', $error_message);
 		}
 
 		return $response_body;
@@ -174,8 +174,8 @@ 
 	 * @link https://developer.paypal.com/docs/api/orders/v2/#orders_get
 	 * @return \WP_Error|object
 	 */
-	public static function get_order( $order_id, $mode = 'live' ) {
-		return self::get( '/v2/checkout/orders/' . $order_id, $mode );
+	public static function get_order($order_id, $mode = 'live') {
+		return self::get('/v2/checkout/orders/' . $order_id, $mode);
 	}
 
 	/**
@@ -187,8 +187,8 @@ 
 	 * @link https://developer.paypal.com/docs/api/subscriptions/v1/#subscriptions_get
 	 * @return \WP_Error|object
 	 */
-	public static function get_subscription( $subscription_id, $mode = 'live' ) {
-		return self::get( '/v1/billing/subscriptions/' . $subscription_id, $mode );
+	public static function get_subscription($subscription_id, $mode = 'live') {
+		return self::get('/v1/billing/subscriptions/' . $subscription_id, $mode);
 	}
 
 	/**
@@ -200,10 +200,10 @@ 
 	 * @link https://developer.paypal.com/docs/api/subscriptions/v1/#subscriptions_transactions
 	 * @return \WP_Error|object
 	 */
-	public static function get_subscription_transaction( $subscription_id, $mode = 'live' ) {
-		$start_time = gmdate( 'Y-m-d\TH:i:s\Z', strtotime( '-1 day' ) );
-		$end_time   = gmdate( 'Y-m-d\TH:i:s\Z' );
-		return self::get( "/v1/billing/subscriptions/$subscription_id/transactions?start_time=$start_time&end_time=$end_time", $mode );
+	public static function get_subscription_transaction($subscription_id, $mode = 'live') {
+		$start_time = gmdate('Y-m-d\TH:i:s\Z', strtotime('-1 day'));
+		$end_time   = gmdate('Y-m-d\TH:i:s\Z');
+		return self::get("/v1/billing/subscriptions/$subscription_id/transactions?start_time=$start_time&end_time=$end_time", $mode);
 	}
 
 	/**
@@ -216,8 +216,8 @@ 
 	 * @link https://developer.paypal.com/docs/api/payments/v2/#captures_refund
 	 * @return \WP_Error|object
 	 */
-	public static function refund_capture( $capture_id, $args = array(), $mode = 'live' ) {
-		return self::post( '/v2/payments/captures/' . $capture_id . '/refund', $args, $mode );
+	public static function refund_capture($capture_id, $args = array(), $mode = 'live') {
+		return self::post('/v2/payments/captures/' . $capture_id . '/refund', $args, $mode);
 	}
 
 	/**
@@ -230,7 +230,7 @@ 
 	 * @link https://developer.paypal.com/docs/api/subscriptions/v1/#subscriptions_cancel
 	 * @return \WP_Error|object
 	 */
-	public static function cancel_subscription( $subscription_id, $args = array(), $mode = 'live' ) {
-		return self::post( '/v1/billing/subscriptions/' . $subscription_id . '/cancel', $args, $mode );
+	public static function cancel_subscription($subscription_id, $args = array(), $mode = 'live') {
+		return self::post('/v1/billing/subscriptions/' . $subscription_id . '/cancel', $args, $mode);
 	}
 }

includes/gateways/class-getpaid-paypal-gateway.php

Indentation +508 added lines, -508 removed lines

@@ -13,103 +13,103 @@ 
 class GetPaid_Paypal_Gateway extends GetPaid_Payment_Gateway {
 
     /**
-	 * Payment method id.
-	 *
-	 * @var string
-	 */
+     * Payment method id.
+     *
+     * @var string
+     */
     public $id = 'paypal';
 
     /**
-	 * An array of features that this gateway supports.
-	 *
-	 * @var array
-	 */
+     * An array of features that this gateway supports.
+     *
+     * @var array
+     */
     protected $supports = array( 'subscription', 'sandbox', 'single_subscription_group', 'refunds' );
 
     /**
-	 * Payment method order.
-	 *
-	 * @var int
-	 */
+     * Payment method order.
+     *
+     * @var int
+     */
     public $order = 1;
 
     /**
-	 * Stores line items to send to PayPal.
-	 *
-	 * @var array
-	 */
+     * Stores line items to send to PayPal.
+     *
+     * @var array
+     */
     protected $line_items = array();
 
     /**
-	 * Endpoint for requests from PayPal.
-	 *
-	 * @var string
-	 */
-	protected $notify_url;
+     * Endpoint for requests from PayPal.
+     *
+     * @var string
+     */
+    protected $notify_url;
 
-	/**
-	 * Endpoint for requests to PayPal.
-	 *
-	 * @var string
-	 */
+    /**
+     * Endpoint for requests to PayPal.
+     *
+     * @var string
+     */
     protected $endpoint;
 
     /**
-	 * Currencies this gateway is allowed for.
-	 *
-	 * @var array
-	 */
-	public $currencies = array( 'AUD', 'BRL', 'CAD', 'MXN', 'NZD', 'HKD', 'SGD', 'USD', 'EUR', 'JPY', 'TRY', 'NOK', 'CZK', 'DKK', 'HUF', 'ILS', 'MYR', 'PHP', 'PLN', 'SEK', 'CHF', 'TWD', 'THB', 'GBP', 'RMB', 'RUB', 'INR' );
+     * Currencies this gateway is allowed for.
+     *
+     * @var array
+     */
+    public $currencies = array( 'AUD', 'BRL', 'CAD', 'MXN', 'NZD', 'HKD', 'SGD', 'USD', 'EUR', 'JPY', 'TRY', 'NOK', 'CZK', 'DKK', 'HUF', 'ILS', 'MYR', 'PHP', 'PLN', 'SEK', 'CHF', 'TWD', 'THB', 'GBP', 'RMB', 'RUB', 'INR' );
 
     /**
-	 * URL to view a transaction.
-	 *
-	 * @var string
-	 */
+     * URL to view a transaction.
+     *
+     * @var string
+     */
     public $view_transaction_url = 'https://www.{sandbox}paypal.com/activity/payment/%s';
 
     /**
-	 * URL to view a subscription.
-	 *
-	 * @var string
-	 */
-	public $view_subscription_url = 'https://www.{sandbox}paypal.com/cgi-bin/webscr?cmd=_profile-recurring-payments&encrypted_profile_id=%s';
+     * URL to view a subscription.
+     *
+     * @var string
+     */
+    public $view_subscription_url = 'https://www.{sandbox}paypal.com/cgi-bin/webscr?cmd=_profile-recurring-payments&encrypted_profile_id=%s';
 
     /**
-	 * Class constructor.
-	 */
-	public function __construct() {
-		parent::__construct();
+     * Class constructor.
+     */
+    public function __construct() {
+        parent::__construct();
 
         $this->title                = __( 'PayPal Standard', 'invoicing' );
         $this->method_title         = __( 'PayPal Standard', 'invoicing' );
         $this->checkout_button_text = __( 'Proceed to PayPal', 'invoicing' );
         $this->notify_url           = wpinv_get_ipn_url( $this->id );
 
-		add_filter( 'wpinv_subscription_cancel_url', array( $this, 'filter_cancel_subscription_url' ), 10, 2 );
-		add_filter( 'getpaid_paypal_args', array( $this, 'process_subscription' ), 10, 2 );
-		add_filter( 'getpaid_get_paypal_connect_url', array( $this, 'maybe_get_connect_url' ), 10, 2 );
-		add_action( 'getpaid_authenticated_admin_action_connect_paypal', array( $this, 'connect_paypal' ) );
-		add_action( 'wpinv_paypal_connect', array( $this, 'display_connect_buttons' ) );
-
-		if ( $this->enabled ) {
-			add_filter( 'getpaid_paypal_sandbox_notice', array( $this, 'sandbox_notice' ) );
-			add_action( 'getpaid_paypal_subscription_cancelled', array( $this, 'subscription_cancelled' ) );
-			add_action( 'getpaid_delete_subscription', array( $this, 'subscription_cancelled' ) );
-			add_action( 'getpaid_refund_invoice_remotely', array( $this, 'refund_invoice' ) );
-		}
+        add_filter( 'wpinv_subscription_cancel_url', array( $this, 'filter_cancel_subscription_url' ), 10, 2 );
+        add_filter( 'getpaid_paypal_args', array( $this, 'process_subscription' ), 10, 2 );
+        add_filter( 'getpaid_get_paypal_connect_url', array( $this, 'maybe_get_connect_url' ), 10, 2 );
+        add_action( 'getpaid_authenticated_admin_action_connect_paypal', array( $this, 'connect_paypal' ) );
+        add_action( 'wpinv_paypal_connect', array( $this, 'display_connect_buttons' ) );
+
+        if ( $this->enabled ) {
+            add_filter( 'getpaid_paypal_sandbox_notice', array( $this, 'sandbox_notice' ) );
+            add_action( 'getpaid_paypal_subscription_cancelled', array( $this, 'subscription_cancelled' ) );
+            add_action( 'getpaid_delete_subscription', array( $this, 'subscription_cancelled' ) );
+            add_action( 'getpaid_refund_invoice_remotely', array( $this, 'refund_invoice' ) );
+        }
     }
 
     /**
-	 * Process Payment.
-	 *
-	 *
-	 * @param WPInv_Invoice $invoice Invoice.
-	 * @param array $submission_data Posted checkout fields.
-	 * @param GetPaid_Payment_Form_Submission $submission Checkout submission.
-	 * @return array
-	 */
-	public function process_payment( $invoice, $submission_data, $submission ) {
+     * Process Payment.
+     *
+     *
+     * @param WPInv_Invoice $invoice Invoice.
+     * @param array $submission_data Posted checkout fields.
+     * @param GetPaid_Payment_Form_Submission $submission Checkout submission.
+     * @return array
+     */
+    public function process_payment( $invoice, $submission_data, $submission ) {
 
         // Get redirect url.
         $paypal_redirect = $this->get_request_url( $invoice );
@@ -132,15 +132,15 @@ 
     }
 
     /**
-	 * Get the PayPal request URL for an invoice.
-	 *
-	 * @param  WPInv_Invoice $invoice Invoice object.
-	 * @return string
-	 */
-	public function get_request_url( $invoice ) {
+     * Get the PayPal request URL for an invoice.
+     *
+     * @param  WPInv_Invoice $invoice Invoice object.
+     * @return string
+     */
+    public function get_request_url( $invoice ) {
 
         // Endpoint for this request
-		$this->endpoint    = $this->is_sandbox( $invoice ) ? 'https://www.sandbox.paypal.com/cgi-bin/webscr?test_ipn=1&' : 'https://www.paypal.com/cgi-bin/webscr?';
+        $this->endpoint    = $this->is_sandbox( $invoice ) ? 'https://www.sandbox.paypal.com/cgi-bin/webscr?test_ipn=1&' : 'https://www.paypal.com/cgi-bin/webscr?';
 
         // Retrieve paypal args.
         $paypal_args       = map_deep( $this->get_paypal_args( $invoice ), 'urlencode' );
@@ -153,45 +153,45 @@ 
 
         return add_query_arg( $paypal_args, $this->endpoint );
 
-	}
+    }
 
     /**
-	 * Get PayPal Args for passing to PP.
-	 *
-	 * @param  WPInv_Invoice $invoice Invoice object.
-	 * @return array
-	 */
-	protected function get_paypal_args( $invoice ) {
+     * Get PayPal Args for passing to PP.
+     *
+     * @param  WPInv_Invoice $invoice Invoice object.
+     * @return array
+     */
+    protected function get_paypal_args( $invoice ) {
 
         // Whether or not to send the line items as one item.
-		$force_one_line_item = apply_filters( 'getpaid_paypal_force_one_line_item', true, $invoice );
-
-		if ( $invoice->is_recurring() || ( wpinv_use_taxes() && wpinv_prices_include_tax() ) ) {
-			$force_one_line_item = true;
-		}
-
-		$paypal_args = apply_filters(
-			'getpaid_paypal_args',
-			array_merge(
-				$this->get_transaction_args( $invoice ),
-				$this->get_line_item_args( $invoice, $force_one_line_item )
-			),
-			$invoice
-		);
-
-		return $this->fix_request_length( $invoice, $paypal_args );
+        $force_one_line_item = apply_filters( 'getpaid_paypal_force_one_line_item', true, $invoice );
+
+        if ( $invoice->is_recurring() || ( wpinv_use_taxes() && wpinv_prices_include_tax() ) ) {
+            $force_one_line_item = true;
+        }
+
+        $paypal_args = apply_filters(
+            'getpaid_paypal_args',
+            array_merge(
+                $this->get_transaction_args( $invoice ),
+                $this->get_line_item_args( $invoice, $force_one_line_item )
+            ),
+            $invoice
+        );
+
+        return $this->fix_request_length( $invoice, $paypal_args );
     }
 
     /**
-	 * Get transaction args for paypal request.
-	 *
-	 * @param WPInv_Invoice $invoice Invoice object.
-	 * @return array
-	 */
-	protected function get_transaction_args( $invoice ) {
+     * Get transaction args for paypal request.
+     *
+     * @param WPInv_Invoice $invoice Invoice object.
+     * @return array
+     */
+    protected function get_transaction_args( $invoice ) {
 
-		$email = $this->is_sandbox( $invoice ) ? wpinv_get_option( 'paypal_sandbox_email', wpinv_get_option( 'paypal_email', '' ) ) : wpinv_get_option( 'paypal_email', '' );
-		return array(
+        $email = $this->is_sandbox( $invoice ) ? wpinv_get_option( 'paypal_sandbox_email', wpinv_get_option( 'paypal_email', '' ) ) : wpinv_get_option( 'paypal_email', '' );
+        return array(
             'cmd'           => '_cart',
             'business'      => $email,
             'no_shipping'   => '1',
@@ -216,16 +216,16 @@ 
     }
 
     /**
-	 * Get line item args for paypal request.
-	 *
-	 * @param  WPInv_Invoice $invoice Invoice object.
-	 * @param  bool     $force_one_line_item Create only one item for this invoice.
-	 * @return array
-	 */
-	protected function get_line_item_args( $invoice, $force_one_line_item = false ) {
+     * Get line item args for paypal request.
+     *
+     * @param  WPInv_Invoice $invoice Invoice object.
+     * @param  bool     $force_one_line_item Create only one item for this invoice.
+     * @return array
+     */
+    protected function get_line_item_args( $invoice, $force_one_line_item = false ) {
 
         // Maybe send invoice as a single item.
-		if ( $force_one_line_item ) {
+        if ( $force_one_line_item ) {
             return $this->get_line_item_args_single_item( $invoice );
         }
 
@@ -245,134 +245,134 @@ 
             $line_item_args['discount_amount_cart'] = wpinv_sanitize_amount( (float) $invoice->get_total_discount(), 2 );
         }
 
-		return array_merge( $line_item_args, $this->get_line_items() );
+        return array_merge( $line_item_args, $this->get_line_items() );
 
     }
 
     /**
-	 * Get line item args for paypal request as a single line item.
-	 *
-	 * @param  WPInv_Invoice $invoice Invoice object.
-	 * @return array
-	 */
-	protected function get_line_item_args_single_item( $invoice ) {
-		$this->delete_line_items();
+     * Get line item args for paypal request as a single line item.
+     *
+     * @param  WPInv_Invoice $invoice Invoice object.
+     * @return array
+     */
+    protected function get_line_item_args_single_item( $invoice ) {
+        $this->delete_line_items();
 
         $item_name = wp_sprintf( __( 'Invoice %s', 'invoicing' ), $invoice->get_number() );
-		$this->add_line_item( $item_name, 1, wpinv_round_amount( (float) $invoice->get_total(), 2, true ), $invoice->get_id() );
+        $this->add_line_item( $item_name, 1, wpinv_round_amount( (float) $invoice->get_total(), 2, true ), $invoice->get_id() );
 
-		return $this->get_line_items();
+        return $this->get_line_items();
     }
 
     /**
-	 * Return all line items.
-	 */
-	protected function get_line_items() {
-		return $this->line_items;
-	}
+     * Return all line items.
+     */
+    protected function get_line_items() {
+        return $this->line_items;
+    }
 
     /**
-	 * Remove all line items.
-	 */
-	protected function delete_line_items() {
-		$this->line_items = array();
+     * Remove all line items.
+     */
+    protected function delete_line_items() {
+        $this->line_items = array();
     }
 
     /**
-	 * Prepare line items to send to paypal.
-	 *
-	 * @param  WPInv_Invoice $invoice Invoice object.
-	 */
-	protected function prepare_line_items( $invoice ) {
-		$this->delete_line_items();
-
-		// Items.
-		foreach ( $invoice->get_items() as $item ) {
-			$amount   = $item->get_price();
-			$quantity = $invoice->get_template() == 'amount' ? 1 : $item->get_quantity();
-			$this->add_line_item( $item->get_raw_name(), $quantity, $amount, $item->get_id() );
+     * Prepare line items to send to paypal.
+     *
+     * @param  WPInv_Invoice $invoice Invoice object.
+     */
+    protected function prepare_line_items( $invoice ) {
+        $this->delete_line_items();
+
+        // Items.
+        foreach ( $invoice->get_items() as $item ) {
+            $amount   = $item->get_price();
+            $quantity = $invoice->get_template() == 'amount' ? 1 : $item->get_quantity();
+            $this->add_line_item( $item->get_raw_name(), $quantity, $amount, $item->get_id() );
         }
 
         // Fees.
-		foreach ( $invoice->get_fees() as $fee => $data ) {
+        foreach ( $invoice->get_fees() as $fee => $data ) {
             $this->add_line_item( $fee, 1, wpinv_sanitize_amount( $data['initial_fee'] ) );
         }
 
     }
 
     /**
-	 * Add PayPal Line Item.
-	 *
-	 * @param  string $item_name Item name.
-	 * @param  float    $quantity Item quantity.
-	 * @param  float  $amount Amount.
-	 * @param  string $item_number Item number.
-	 */
-	protected function add_line_item( $item_name, $quantity = 1, $amount = 0.0, $item_number = '' ) {
-		$index = ( count( $this->line_items ) / 4 ) + 1;
-
-		/**
-		 * Prevent error "Things don't appear to be working at the moment. (https://www.sandbox.paypal.com/webapps/hermes/error)"
-		 */
-		$item_name = str_replace( "#", "", $item_name );
-
-		$item = apply_filters(
-			'getpaid_paypal_line_item',
-			array(
-				'item_name'   => html_entity_decode( getpaid_limit_length( $item_name ? wp_strip_all_tags( $item_name ) : __( 'Item', 'invoicing' ), 127 ), ENT_NOQUOTES, 'UTF-8' ),
-				'quantity'    => (float) $quantity,
-				'amount'      => wpinv_sanitize_amount( (float) $amount, 2 ),
-				'item_number' => $item_number,
-			),
-			$item_name,
-			$quantity,
-			$amount,
-			$item_number
-		);
-
-		$this->line_items[ 'item_name_' . $index ]   = getpaid_limit_length( $item['item_name'], 127 );
+     * Add PayPal Line Item.
+     *
+     * @param  string $item_name Item name.
+     * @param  float    $quantity Item quantity.
+     * @param  float  $amount Amount.
+     * @param  string $item_number Item number.
+     */
+    protected function add_line_item( $item_name, $quantity = 1, $amount = 0.0, $item_number = '' ) {
+        $index = ( count( $this->line_items ) / 4 ) + 1;
+
+        /**
+         * Prevent error "Things don't appear to be working at the moment. (https://www.sandbox.paypal.com/webapps/hermes/error)"
+         */
+        $item_name = str_replace( "#", "", $item_name );
+
+        $item = apply_filters(
+            'getpaid_paypal_line_item',
+            array(
+                'item_name'   => html_entity_decode( getpaid_limit_length( $item_name ? wp_strip_all_tags( $item_name ) : __( 'Item', 'invoicing' ), 127 ), ENT_NOQUOTES, 'UTF-8' ),
+                'quantity'    => (float) $quantity,
+                'amount'      => wpinv_sanitize_amount( (float) $amount, 2 ),
+                'item_number' => $item_number,
+            ),
+            $item_name,
+            $quantity,
+            $amount,
+            $item_number
+        );
+
+        $this->line_items[ 'item_name_' . $index ]   = getpaid_limit_length( $item['item_name'], 127 );
         $this->line_items[ 'quantity_' . $index ]    = $item['quantity'];
 
         // The price or amount of the product, service, or contribution, not including shipping, handling, or tax.
-		$this->line_items[ 'amount_' . $index ]      = $item['amount'] * $item['quantity'];
-		$this->line_items[ 'item_number_' . $index ] = getpaid_limit_length( $item['item_number'], 127 );
+        $this->line_items[ 'amount_' . $index ]      = $item['amount'] * $item['quantity'];
+        $this->line_items[ 'item_number_' . $index ] = getpaid_limit_length( $item['item_number'], 127 );
     }
 
     /**
-	 * If the default request with line items is too long, generate a new one with only one line item.
-	 *
-	 * https://support.microsoft.com/en-us/help/208427/maximum-url-length-is-2-083-characters-in-internet-explorer.
-	 *
-	 * @param WPInv_Invoice $invoice Invoice to be sent to Paypal.
-	 * @param array    $paypal_args Arguments sent to Paypal in the request.
-	 * @return array
-	 */
-	protected function fix_request_length( $invoice, $paypal_args ) {
-		$max_paypal_length = 2083;
-		$query_candidate   = http_build_query( $paypal_args, '', '&' );
-
-		if ( strlen( $this->endpoint . $query_candidate ) <= $max_paypal_length ) {
-			return $paypal_args;
-		}
-
-		return apply_filters(
-			'getpaid_paypal_args',
-			array_merge(
-				$this->get_transaction_args( $invoice ),
-				$this->get_line_item_args( $invoice, true )
-			),
-			$invoice
-		);
+     * If the default request with line items is too long, generate a new one with only one line item.
+     *
+     * https://support.microsoft.com/en-us/help/208427/maximum-url-length-is-2-083-characters-in-internet-explorer.
+     *
+     * @param WPInv_Invoice $invoice Invoice to be sent to Paypal.
+     * @param array    $paypal_args Arguments sent to Paypal in the request.
+     * @return array
+     */
+    protected function fix_request_length( $invoice, $paypal_args ) {
+        $max_paypal_length = 2083;
+        $query_candidate   = http_build_query( $paypal_args, '', '&' );
+
+        if ( strlen( $this->endpoint . $query_candidate ) <= $max_paypal_length ) {
+            return $paypal_args;
+        }
+
+        return apply_filters(
+            'getpaid_paypal_args',
+            array_merge(
+                $this->get_transaction_args( $invoice ),
+                $this->get_line_item_args( $invoice, true )
+            ),
+            $invoice
+        );
 
     }
 
     /**
-	 * Processes recurring invoices.
-	 *
-	 * @param  array $paypal_args PayPal args.
-	 * @param  WPInv_Invoice    $invoice Invoice object.
-	 */
-	public function process_subscription( $paypal_args, $invoice ) {
+     * Processes recurring invoices.
+     *
+     * @param  array $paypal_args PayPal args.
+     * @param  WPInv_Invoice    $invoice Invoice object.
+     */
+    public function process_subscription( $paypal_args, $invoice ) {
 
         // Make sure this is a subscription.
         if ( ! $invoice->is_recurring() || ! $subscription = getpaid_get_invoice_subscription( $invoice ) ) {
@@ -393,21 +393,21 @@ 
         $recurring_amount       = (float) wpinv_sanitize_amount( $invoice->get_recurring_total(), 2 );
         $subscription_item      = $invoice->get_recurring( true );
 
-		// Convert 365 days to 1 year.
-		if ( 'D' == $period && 365 == $interval ) {
-			$period = 'Y';
-			$interval = 1;
-		}
+        // Convert 365 days to 1 year.
+        if ( 'D' == $period && 365 == $interval ) {
+            $period = 'Y';
+            $interval = 1;
+        }
 
         if ( $subscription_item->has_free_trial() ) {
 
             $paypal_args['a1'] = 0 == $initial_amount ? 0 : $initial_amount;
 
-			// Trial period length.
-			$paypal_args['p1'] = $subscription_item->get_trial_interval();
+            // Trial period length.
+            $paypal_args['p1'] = $subscription_item->get_trial_interval();
 
-			// Trial period.
-			$paypal_args['t1'] = $subscription_item->get_trial_period();
+            // Trial period.
+            $paypal_args['t1'] = $subscription_item->get_trial_period();
 
         } elseif ( $initial_amount != $recurring_amount ) {
 
@@ -430,40 +430,40 @@ 
         }
 
         // We have a recurring payment
-		if ( ! isset( $param_number ) || 1 == $param_number ) {
+        if ( ! isset( $param_number ) || 1 == $param_number ) {
 
-			// Subscription price
-			$paypal_args['a3'] = $recurring_amount;
+            // Subscription price
+            $paypal_args['a3'] = $recurring_amount;
 
-			// Subscription duration
-			$paypal_args['p3'] = $interval;
+            // Subscription duration
+            $paypal_args['p3'] = $interval;
 
-			// Subscription period
-			$paypal_args['t3'] = $period;
+            // Subscription period
+            $paypal_args['t3'] = $period;
 
         }
 
         // Recurring payments
-		if ( 1 == $bill_times || ( $initial_amount != $recurring_amount && ! $subscription_item->has_free_trial() && 2 == $bill_times ) ) {
+        if ( 1 == $bill_times || ( $initial_amount != $recurring_amount && ! $subscription_item->has_free_trial() && 2 == $bill_times ) ) {
 
-			// Non-recurring payments
-			$paypal_args['src'] = 0;
+            // Non-recurring payments
+            $paypal_args['src'] = 0;
 
-		} else {
+        } else {
 
-			$paypal_args['src'] = 1;
+            $paypal_args['src'] = 1;
 
-			if ( $bill_times > 0 ) {
+            if ( $bill_times > 0 ) {
 
-				// An initial period is being used to charge a sign-up fee
-				if ( $initial_amount != $recurring_amount && ! $subscription_item->has_free_trial() ) {
-					$bill_times--;
-				}
+                // An initial period is being used to charge a sign-up fee
+                if ( $initial_amount != $recurring_amount && ! $subscription_item->has_free_trial() ) {
+                    $bill_times--;
+                }
 
                 // Make sure it's not over the max of 52
                 $paypal_args['srt'] = ( $bill_times <= 52 ? absint( $bill_times ) : 52 );
 
-			}
+            }
         }
 
         // Force return URL so that order description & instructions display
@@ -475,115 +475,115 @@ 
             if ( isset( $paypal_args[ $arg ] ) ) {
                 unset( $paypal_args[ $arg ] );
             }
-		}
+        }
 
         return apply_filters(
-			'getpaid_paypal_subscription_args',
-			$paypal_args,
-			$invoice
+            'getpaid_paypal_subscription_args',
+            $paypal_args,
+            $invoice
+        );
+
+    }
+
+    /**
+     * Refunds an invoice remotely.
+     * 
+     * @since 2.8.24
+     * @param WPInv_Invoice $invoice Invoice object.
+     */
+    public function refund_invoice( $invoice ) {
+
+        if ( $invoice->get_gateway() !== $this->id ) {
+            return;
+        }
+
+        $mode	= $this->is_sandbox( $invoice ) ? 'sandbox' : 'live';
+        $result = GetPaid_PayPal_API::refund_capture( $invoice->get_transaction_id(), array(), $mode );
+
+        if ( is_wp_error( $result ) ) {
+            $invoice->add_system_note(
+                sprintf(
+                    // translators: %s is the error message.
+                    __( 'An error occured while trying to refund invoice #%1$s in PayPal: %2$s', 'invoicing' ),
+                    $invoice->get_id(),
+                    $result->get_error_message()
+                )
+            );
+        } else {
+            $invoice->add_system_note(
+                sprintf(
+                    // translators: %s is the refund ID.
+                    __( 'Successfully refunded invoice #%1$s in PayPal. Refund ID: %2$s', 'invoicing' ),
+                    $invoice->get_id(),
+                    $result->id
+                )
+            );
+        }
+    }
+
+    /**
+     * Cancels a subscription remotely.
+     * 
+     * @since 2.8.24
+     * @param WPInv_Subscription $subscription Subscription object.
+     */
+    public function subscription_cancelled( $subscription ) {
+
+        if ( $subscription->get_gateway() != $this->id ) {
+            return;
+        }
+
+        $invoice = $subscription->get_parent_invoice();
+
+        // Abort if the parent invoice does not exist.
+        if ( ! $invoice->exists() ) {
+            return;
+        }
+
+        $mode	= $this->is_sandbox( $invoice ) ? 'sandbox' : 'live';
+        $result = GetPaid_PayPal_API::cancel_subscription( 
+            $invoice->get_remote_subscription_id(), 
+            array(
+                'reason' => __(' Customer requested cancellation', 'invoicing' ),
+            ), 
+            $mode 
         );
 
+        if ( is_wp_error( $result ) ) {
+
+            $error = sprintf(
+                // translators: %s is the subscription ID.
+                __( 'An error occured while trying to cancel subscription #%s in PayPal.', 'invoicing' ),
+                $subscription->get_id()
+            );
+
+            getpaid_admin()->show_error( $error . ' ' . $result->get_error_message() );
+
+            if ( ! is_admin() ) {
+                wpinv_set_error( $result->get_error_code(), $error );
+            }
+
+            return;
+        }
+
+        if ( is_admin() ) {
+            getpaid_admin()->show_success(
+                sprintf(
+                    // translators: %s is the subscription ID.
+                    __( 'Successfully cancelled subscription #%s in PayPal.', 'invoicing' ),
+                    $subscription->get_id()
+                )
+            );
+        }
+
     }
 
-	/**
-	 * Refunds an invoice remotely.
-	 * 
-	 * @since 2.8.24
-	 * @param WPInv_Invoice $invoice Invoice object.
-	 */
-	public function refund_invoice( $invoice ) {
-
-		if ( $invoice->get_gateway() !== $this->id ) {
-			return;
-		}
-
-		$mode	= $this->is_sandbox( $invoice ) ? 'sandbox' : 'live';
-		$result = GetPaid_PayPal_API::refund_capture( $invoice->get_transaction_id(), array(), $mode );
-
-		if ( is_wp_error( $result ) ) {
-			$invoice->add_system_note(
-				sprintf(
-					// translators: %s is the error message.
-					__( 'An error occured while trying to refund invoice #%1$s in PayPal: %2$s', 'invoicing' ),
-					$invoice->get_id(),
-					$result->get_error_message()
-				)
-			);
-		} else {
-			$invoice->add_system_note(
-				sprintf(
-					// translators: %s is the refund ID.
-					__( 'Successfully refunded invoice #%1$s in PayPal. Refund ID: %2$s', 'invoicing' ),
-					$invoice->get_id(),
-					$result->id
-				)
-			);
-		}
-	}
-
-	/**
-	 * Cancels a subscription remotely.
-	 * 
-	 * @since 2.8.24
-	 * @param WPInv_Subscription $subscription Subscription object.
-	 */
-	public function subscription_cancelled( $subscription ) {
-
-		if ( $subscription->get_gateway() != $this->id ) {
-			return;
-		}
-
-		$invoice = $subscription->get_parent_invoice();
-
-		// Abort if the parent invoice does not exist.
-		if ( ! $invoice->exists() ) {
-			return;
-		}
-
-		$mode	= $this->is_sandbox( $invoice ) ? 'sandbox' : 'live';
-		$result = GetPaid_PayPal_API::cancel_subscription( 
-			$invoice->get_remote_subscription_id(), 
-			array(
-				'reason' => __(' Customer requested cancellation', 'invoicing' ),
-			), 
-			$mode 
-		);
-
-		if ( is_wp_error( $result ) ) {
-
-			$error = sprintf(
-				// translators: %s is the subscription ID.
-				__( 'An error occured while trying to cancel subscription #%s in PayPal.', 'invoicing' ),
-				$subscription->get_id()
-			);
-
-			getpaid_admin()->show_error( $error . ' ' . $result->get_error_message() );
-
-			if ( ! is_admin() ) {
-				wpinv_set_error( $result->get_error_code(), $error );
-			}
-
-			return;
-		}
-
-		if ( is_admin() ) {
-			getpaid_admin()->show_success(
-				sprintf(
-					// translators: %s is the subscription ID.
-					__( 'Successfully cancelled subscription #%s in PayPal.', 'invoicing' ),
-					$subscription->get_id()
-				)
-			);
-		}
-
-	}
-
-    /**
-	 * Processes ipns and marks payments as complete.
-	 *
-	 * @return void
-	 */
-	public function verify_ipn() {
+    /**
+     * Processes ipns and marks payments as complete.
+     *
+     * @return void
+     */
+    public function verify_ipn() {
         new GetPaid_Paypal_Gateway_IPN_Handler( $this );
     }
 
@@ -593,19 +593,19 @@ 
     public function sandbox_notice() {
 
         return sprintf(
-			__( 'SANDBOX ENABLED. You can use sandbox testing accounts only. See the %1$sPayPal Sandbox Testing Guide%2$s for more details.', 'invoicing' ),
-			'<a href="https://developer.paypal.com/docs/classic/lifecycle/ug_sandbox/">',
-			'</a>'
-		);
+            __( 'SANDBOX ENABLED. You can use sandbox testing accounts only. See the %1$sPayPal Sandbox Testing Guide%2$s for more details.', 'invoicing' ),
+            '<a href="https://developer.paypal.com/docs/classic/lifecycle/ug_sandbox/">',
+            '</a>'
+        );
 
     }
 
-	/**
-	 * Filters the gateway settings.
-	 *
-	 * @param array $admin_settings
-	 */
-	public function admin_settings( $admin_settings ) {
+    /**
+     * Filters the gateway settings.
+     *
+     * @param array $admin_settings
+     */
+    public function admin_settings( $admin_settings ) {
 
         $currencies = sprintf(
             __( 'Supported Currencies: %s', 'invoicing' ),
@@ -615,66 +615,66 @@ 
         $admin_settings['paypal_active']['desc'] .= " ($currencies)";
         $admin_settings['paypal_desc']['std']     = __( 'Pay via PayPal: you can pay with your credit card if you don\'t have a PayPal account.', 'invoicing' );
 
-		// Access tokens.
-		$live_email      = wpinv_get_option( 'paypal_email' );
-		$sandbox_email   = wpinv_get_option( 'paypal_sandbox_email' );
+        // Access tokens.
+        $live_email      = wpinv_get_option( 'paypal_email' );
+        $sandbox_email   = wpinv_get_option( 'paypal_sandbox_email' );
 
-		$admin_settings['paypal_connect'] = array(
-			'type' => 'hook',
-			'id'   => 'paypal_connect',
-			'name' => __( 'Connect to PayPal', 'invoicing' ),
-		);
+        $admin_settings['paypal_connect'] = array(
+            'type' => 'hook',
+            'id'   => 'paypal_connect',
+            'name' => __( 'Connect to PayPal', 'invoicing' ),
+        );
 
         $admin_settings['paypal_email'] = array(
             'type'  => 'text',
-			'class' => 'live-auth-data',
+            'class' => 'live-auth-data',
             'id'    => 'paypal_email',
             'name'  => __( 'Live Email Address', 'invoicing' ),
             'desc'  => __( 'The email address of your PayPal account.', 'invoicing' ),
         );
 
-		$admin_settings['paypal_sandbox_email'] = array(
+        $admin_settings['paypal_sandbox_email'] = array(
             'type'  => 'text',
-			'class' => 'sandbox-auth-data',
+            'class' => 'sandbox-auth-data',
             'id'    => 'paypal_sandbox_email',
             'name'  => __( 'Sandbox Email Address', 'invoicing' ),
             'desc'  => __( 'The email address of your sandbox PayPal account.', 'invoicing' ),
-			'std'   => wpinv_get_option( 'paypal_email', '' ),
+            'std'   => wpinv_get_option( 'paypal_email', '' ),
+        );
+
+        // Client ID and secret.
+        $admin_settings['paypal_client_id'] = array(
+            'type'  => 'text',
+            'class' => 'live-auth-data',
+            'id'    => 'paypal_client_id',
+            'name'  => __( 'Live Client ID', 'invoicing' ),
+            'desc'  => __( 'The client ID of your PayPal account. You can retrieve this from your PayPal developer account.', 'invoicing' ),
+        );
+
+        $admin_settings['paypal_sandbox_client_id'] = array(
+            'type'  => 'text',
+            'class' => 'sandbox-auth-data',
+            'id'    => 'paypal_sandbox_client_id',
+            'name'  => __( 'Sandbox Client ID', 'invoicing' ),
+            'desc'  => __( 'The client ID of your sandbox PayPal account. You can retrieve this from your PayPal developer account.', 'invoicing' ),
+            'std'   => wpinv_get_option( 'paypal_client_id', '' ),
         );
 
-		// Client ID and secret.
-		$admin_settings['paypal_client_id'] = array(
-			'type'  => 'text',
-			'class' => 'live-auth-data',
-			'id'    => 'paypal_client_id',
-			'name'  => __( 'Live Client ID', 'invoicing' ),
-			'desc'  => __( 'The client ID of your PayPal account. You can retrieve this from your PayPal developer account.', 'invoicing' ),
-		);
-
-		$admin_settings['paypal_sandbox_client_id'] = array(
-			'type'  => 'text',
-			'class' => 'sandbox-auth-data',
-			'id'    => 'paypal_sandbox_client_id',
-			'name'  => __( 'Sandbox Client ID', 'invoicing' ),
-			'desc'  => __( 'The client ID of your sandbox PayPal account. You can retrieve this from your PayPal developer account.', 'invoicing' ),
-			'std'   => wpinv_get_option( 'paypal_client_id', '' ),
-		);
-
-		$admin_settings['paypal_secret'] = array(
-			'type'  => 'text',
-			'class' => 'live-auth-data',
-			'id'    => 'paypal_secret',
-			'name'  => __( 'Live Secret', 'invoicing' ),
-			'desc'  => __( 'The secret of your PayPal account. You can retrieve this from your PayPal developer account.', 'invoicing' ),
-		);
-
-		$admin_settings['paypal_sandbox_secret'] = array(
-			'type'  => 'text',
-			'class' => 'sandbox-auth-data',
-			'id'    => 'paypal_sandbox_secret',
-			'name'  => __( 'Sandbox Secret', 'invoicing' ),
-			'desc'  => __( 'The secret of your sandbox PayPal account. You can retrieve this from your PayPal developer account.', 'invoicing' ),
-		);
+        $admin_settings['paypal_secret'] = array(
+            'type'  => 'text',
+            'class' => 'live-auth-data',
+            'id'    => 'paypal_secret',
+            'name'  => __( 'Live Secret', 'invoicing' ),
+            'desc'  => __( 'The secret of your PayPal account. You can retrieve this from your PayPal developer account.', 'invoicing' ),
+        );
+
+        $admin_settings['paypal_sandbox_secret'] = array(
+            'type'  => 'text',
+            'class' => 'sandbox-auth-data',
+            'id'    => 'paypal_sandbox_secret',
+            'name'  => __( 'Sandbox Secret', 'invoicing' ),
+            'desc'  => __( 'The secret of your sandbox PayPal account. You can retrieve this from your PayPal developer account.', 'invoicing' ),
+        );
 
         $admin_settings['paypal_ipn_url'] = array(
             'type'     => 'ipn_url',
@@ -685,57 +685,57 @@ 
             'readonly' => true,
         );
 
-		return $admin_settings;
-	}
-
-	/**
-	 * Retrieves the URL to cancel a subscription.
-	 *
-	 * @param string $url
-	 * @param WPInv_Subscription $subscription
-	 */
-	public function filter_cancel_subscription_url( $url, $subscription ) {
-
-		if ( $this->id !== $subscription->get_gateway() ) {
-			return $url;
-		}
-
-		// Get the PayPal profile ID.
-		$profile_id = $subscription->get_profile_id();
-
-		// Bail if no profile ID.
-		if ( empty( $profile_id ) ) {
-			return $url;
-		}
-
-		$cancel_url = 'https://www.paypal.com/myaccount/autopay/connect/%s/cancel';
-		if ( $this->is_sandbox( $subscription->get_parent_payment() ) ) {
-			$cancel_url = 'https://www.sandbox.paypal.com/myaccount/autopay/connect/%s/cancel';
-		}
-
-		return sprintf( $cancel_url, $profile_id );
-	}
-
-	/**
-	 * Retrieves the PayPal connect URL when using the setup wizzard.
-	 *
-	 *
+        return $admin_settings;
+    }
+
+    /**
+     * Retrieves the URL to cancel a subscription.
+     *
+     * @param string $url
+     * @param WPInv_Subscription $subscription
+     */
+    public function filter_cancel_subscription_url( $url, $subscription ) {
+
+        if ( $this->id !== $subscription->get_gateway() ) {
+            return $url;
+        }
+
+        // Get the PayPal profile ID.
+        $profile_id = $subscription->get_profile_id();
+
+        // Bail if no profile ID.
+        if ( empty( $profile_id ) ) {
+            return $url;
+        }
+
+        $cancel_url = 'https://www.paypal.com/myaccount/autopay/connect/%s/cancel';
+        if ( $this->is_sandbox( $subscription->get_parent_payment() ) ) {
+            $cancel_url = 'https://www.sandbox.paypal.com/myaccount/autopay/connect/%s/cancel';
+        }
+
+        return sprintf( $cancel_url, $profile_id );
+    }
+
+    /**
+     * Retrieves the PayPal connect URL when using the setup wizzard.
+     *
+     *
      * @param array $data
      * @return string
-	 */
-	public static function maybe_get_connect_url( $url = '', $data = array() ) {
-		return self::get_connect_url( false, urldecode( $data['redirect'] ) );
-	}
-
-	/**
-	 * Retrieves the PayPal connect URL.
-	 *
-	 *
+     */
+    public static function maybe_get_connect_url( $url = '', $data = array() ) {
+        return self::get_connect_url( false, urldecode( $data['redirect'] ) );
+    }
+
+    /**
+     * Retrieves the PayPal connect URL.
+     *
+     *
      * @param bool $is_sandbox
-	 * @param string $redirect
+     * @param string $redirect
      * @return string
-	 */
-	public static function get_connect_url( $is_sandbox, $redirect = '' ) {
+     */
+    public static function get_connect_url( $is_sandbox, $redirect = '' ) {
 
         $redirect_url = add_query_arg(
             array(
@@ -745,7 +745,7 @@ 
                 'tab'                  => 'gateways',
                 'section'              => 'paypal',
                 'getpaid-nonce'        => wp_create_nonce( 'getpaid-nonce' ),
-				'redirect'             => urlencode( $redirect ),
+                'redirect'             => urlencode( $redirect ),
             ),
             admin_url( 'admin.php' )
         );
@@ -760,12 +760,12 @@ 
 
     }
 
-	/**
-	 * Generates settings page js.
-	 *
+    /**
+     * Generates settings page js.
+     *
      * @return void
-	 */
-	public static function display_connect_buttons() {
+     */
+    public static function display_connect_buttons() {
 
         ?>
 			<div class="wpinv-paypal-connect-live">
@@ -807,70 +807,70 @@ 
         <?php
     }
 
-	/**
-	 * Connects to PayPal.
-	 *
-	 * @param array $data Connection data.
-	 * @return void
-	 */
-	public function connect_paypal( $data ) {
-
-		$sandbox      = $this->is_sandbox();
-		$data         = wp_unslash( $data );
-		$access_token = empty( $data['access_token'] ) ? '' : sanitize_text_field( $data['access_token'] );
-
-		if ( isset( $data['live_mode'] ) ) {
-			$sandbox = empty( $data['live_mode'] );
-		}
-
-		wpinv_update_option( 'paypal_sandbox', (int) $sandbox );
-		wpinv_update_option( 'paypal_active', 1 );
-
-		if ( ! empty( $data['error_description'] ) ) {
-			getpaid_admin()->show_error( wp_kses_post( urldecode( $data['error_description'] ) ) );
-		} else {
-
-			// Retrieve the user info.
-			$user_info = wp_remote_get(
-				! $sandbox ? 'https://api-m.paypal.com/v1/identity/oauth2/userinfo?schema=paypalv1.1' : 'https://api-m.sandbox.paypal.com/v1/identity/oauth2/userinfo?schema=paypalv1.1',
-				array(
-
-					'headers' => array(
-						'Authorization' => 'Bearer ' . $access_token,
-						'Content-type'  => 'application/json',
-					),
-
-				)
-			);
-
-			if ( is_wp_error( $user_info ) ) {
-				getpaid_admin()->show_error( wp_kses_post( $user_info->get_error_message() ) );
-			} else {
-
-				// Create application.
-				$user_info = json_decode( wp_remote_retrieve_body( $user_info ) );
-
-				if ( $sandbox ) {
-					wpinv_update_option( 'paypal_sandbox_email', sanitize_email( $user_info->emails[0]->value ) );
-					wpinv_update_option( 'paypal_sandbox_refresh_token', sanitize_text_field( urldecode( $data['refresh_token'] ) ) );
-					set_transient( 'getpaid_paypal_sandbox_access_token', sanitize_text_field( urldecode( $data['access_token'] ) ), (int) $data['expires_in'] );
-					getpaid_admin()->show_success( __( 'Successfully connected your PayPal sandbox account', 'invoicing' ) );
-				} else {
-					wpinv_update_option( 'paypal_email', sanitize_email( $user_info->emails[0]->value ) );
-					wpinv_update_option( 'paypal_refresh_token', sanitize_text_field( urldecode( $data['refresh_token'] ) ) );
-					set_transient( 'getpaid_paypal_access_token', sanitize_text_field( urldecode( $data['access_token'] ) ), (int) $data['expires_in'] );
-					getpaid_admin()->show_success( __( 'Successfully connected your PayPal account', 'invoicing' ) );
-				}
-			}
-		}
-
-		$redirect = empty( $data['redirect'] ) ? admin_url( 'admin.php?page=wpinv-settings&tab=gateways&section=paypal' ) : urldecode( $data['redirect'] );
-
-		if ( isset( $data['step'] ) ) {
-			$redirect = add_query_arg( 'step', $data['step'], $redirect );
-		}
-		wp_redirect( $redirect );
-		exit;
-	}
+    /**
+     * Connects to PayPal.
+     *
+     * @param array $data Connection data.
+     * @return void
+     */
+    public function connect_paypal( $data ) {
+
+        $sandbox      = $this->is_sandbox();
+        $data         = wp_unslash( $data );
+        $access_token = empty( $data['access_token'] ) ? '' : sanitize_text_field( $data['access_token'] );
+
+        if ( isset( $data['live_mode'] ) ) {
+            $sandbox = empty( $data['live_mode'] );
+        }
+
+        wpinv_update_option( 'paypal_sandbox', (int) $sandbox );
+        wpinv_update_option( 'paypal_active', 1 );
+
+        if ( ! empty( $data['error_description'] ) ) {
+            getpaid_admin()->show_error( wp_kses_post( urldecode( $data['error_description'] ) ) );
+        } else {
+
+            // Retrieve the user info.
+            $user_info = wp_remote_get(
+                ! $sandbox ? 'https://api-m.paypal.com/v1/identity/oauth2/userinfo?schema=paypalv1.1' : 'https://api-m.sandbox.paypal.com/v1/identity/oauth2/userinfo?schema=paypalv1.1',
+                array(
+
+                    'headers' => array(
+                        'Authorization' => 'Bearer ' . $access_token,
+                        'Content-type'  => 'application/json',
+                    ),
+
+                )
+            );
+
+            if ( is_wp_error( $user_info ) ) {
+                getpaid_admin()->show_error( wp_kses_post( $user_info->get_error_message() ) );
+            } else {
+
+                // Create application.
+                $user_info = json_decode( wp_remote_retrieve_body( $user_info ) );
+
+                if ( $sandbox ) {
+                    wpinv_update_option( 'paypal_sandbox_email', sanitize_email( $user_info->emails[0]->value ) );
+                    wpinv_update_option( 'paypal_sandbox_refresh_token', sanitize_text_field( urldecode( $data['refresh_token'] ) ) );
+                    set_transient( 'getpaid_paypal_sandbox_access_token', sanitize_text_field( urldecode( $data['access_token'] ) ), (int) $data['expires_in'] );
+                    getpaid_admin()->show_success( __( 'Successfully connected your PayPal sandbox account', 'invoicing' ) );
+                } else {
+                    wpinv_update_option( 'paypal_email', sanitize_email( $user_info->emails[0]->value ) );
+                    wpinv_update_option( 'paypal_refresh_token', sanitize_text_field( urldecode( $data['refresh_token'] ) ) );
+                    set_transient( 'getpaid_paypal_access_token', sanitize_text_field( urldecode( $data['access_token'] ) ), (int) $data['expires_in'] );
+                    getpaid_admin()->show_success( __( 'Successfully connected your PayPal account', 'invoicing' ) );
+                }
+            }
+        }
+
+        $redirect = empty( $data['redirect'] ) ? admin_url( 'admin.php?page=wpinv-settings&tab=gateways&section=paypal' ) : urldecode( $data['redirect'] );
+
+        if ( isset( $data['step'] ) ) {
+            $redirect = add_query_arg( 'step', $data['step'], $redirect );
+        }
+        wp_redirect( $redirect );
+        exit;
+    }
 
 }

Spacing +185 added lines, -185 removed lines

@@ -4,7 +4,7 @@ 
  *
  */
 
-defined( 'ABSPATH' ) || exit;
+defined('ABSPATH') || exit;
 
 /**
  * Paypal Payment Gateway class.
@@ -24,7 +24,7 @@ 
 	 *
 	 * @var array
 	 */
-    protected $supports = array( 'subscription', 'sandbox', 'single_subscription_group', 'refunds' );
+    protected $supports = array('subscription', 'sandbox', 'single_subscription_group', 'refunds');
 
     /**
 	 * Payment method order.
@@ -59,7 +59,7 @@ 
 	 *
 	 * @var array
 	 */
-	public $currencies = array( 'AUD', 'BRL', 'CAD', 'MXN', 'NZD', 'HKD', 'SGD', 'USD', 'EUR', 'JPY', 'TRY', 'NOK', 'CZK', 'DKK', 'HUF', 'ILS', 'MYR', 'PHP', 'PLN', 'SEK', 'CHF', 'TWD', 'THB', 'GBP', 'RMB', 'RUB', 'INR' );
+	public $currencies = array('AUD', 'BRL', 'CAD', 'MXN', 'NZD', 'HKD', 'SGD', 'USD', 'EUR', 'JPY', 'TRY', 'NOK', 'CZK', 'DKK', 'HUF', 'ILS', 'MYR', 'PHP', 'PLN', 'SEK', 'CHF', 'TWD', 'THB', 'GBP', 'RMB', 'RUB', 'INR');
 
     /**
 	 * URL to view a transaction.
@@ -81,22 +81,22 @@ 
 	public function __construct() {
 		parent::__construct();
 
-        $this->title                = __( 'PayPal Standard', 'invoicing' );
-        $this->method_title         = __( 'PayPal Standard', 'invoicing' );
-        $this->checkout_button_text = __( 'Proceed to PayPal', 'invoicing' );
-        $this->notify_url           = wpinv_get_ipn_url( $this->id );
-
-		add_filter( 'wpinv_subscription_cancel_url', array( $this, 'filter_cancel_subscription_url' ), 10, 2 );
-		add_filter( 'getpaid_paypal_args', array( $this, 'process_subscription' ), 10, 2 );
-		add_filter( 'getpaid_get_paypal_connect_url', array( $this, 'maybe_get_connect_url' ), 10, 2 );
-		add_action( 'getpaid_authenticated_admin_action_connect_paypal', array( $this, 'connect_paypal' ) );
-		add_action( 'wpinv_paypal_connect', array( $this, 'display_connect_buttons' ) );
-
-		if ( $this->enabled ) {
-			add_filter( 'getpaid_paypal_sandbox_notice', array( $this, 'sandbox_notice' ) );
-			add_action( 'getpaid_paypal_subscription_cancelled', array( $this, 'subscription_cancelled' ) );
-			add_action( 'getpaid_delete_subscription', array( $this, 'subscription_cancelled' ) );
-			add_action( 'getpaid_refund_invoice_remotely', array( $this, 'refund_invoice' ) );
+        $this->title                = __('PayPal Standard', 'invoicing');
+        $this->method_title         = __('PayPal Standard', 'invoicing');
+        $this->checkout_button_text = __('Proceed to PayPal', 'invoicing');
+        $this->notify_url           = wpinv_get_ipn_url($this->id);
+
+		add_filter('wpinv_subscription_cancel_url', array($this, 'filter_cancel_subscription_url'), 10, 2);
+		add_filter('getpaid_paypal_args', array($this, 'process_subscription'), 10, 2);
+		add_filter('getpaid_get_paypal_connect_url', array($this, 'maybe_get_connect_url'), 10, 2);
+		add_action('getpaid_authenticated_admin_action_connect_paypal', array($this, 'connect_paypal'));
+		add_action('wpinv_paypal_connect', array($this, 'display_connect_buttons'));
+
+		if ($this->enabled) {
+			add_filter('getpaid_paypal_sandbox_notice', array($this, 'sandbox_notice'));
+			add_action('getpaid_paypal_subscription_cancelled', array($this, 'subscription_cancelled'));
+			add_action('getpaid_delete_subscription', array($this, 'subscription_cancelled'));
+			add_action('getpaid_refund_invoice_remotely', array($this, 'refund_invoice'));
 		}
     }
 
@@ -109,16 +109,16 @@ 
 	 * @param GetPaid_Payment_Form_Submission $submission Checkout submission.
 	 * @return array
 	 */
-	public function process_payment( $invoice, $submission_data, $submission ) {
+	public function process_payment($invoice, $submission_data, $submission) {
 
         // Get redirect url.
-        $paypal_redirect = $this->get_request_url( $invoice );
+        $paypal_redirect = $this->get_request_url($invoice);
 
         // Add a note about the request url.
         $invoice->add_note(
             sprintf(
-                __( 'Redirecting to PayPal: %s', 'invoicing' ),
-                esc_url( $paypal_redirect )
+                __('Redirecting to PayPal: %s', 'invoicing'),
+                esc_url($paypal_redirect)
             ),
             false,
             false,
@@ -126,7 +126,7 @@ 
         );
 
         // Redirect to PayPal
-        wp_redirect( $paypal_redirect );
+        wp_redirect($paypal_redirect);
         exit;
 
     }
@@ -137,21 +137,21 @@ 
 	 * @param  WPInv_Invoice $invoice Invoice object.
 	 * @return string
 	 */
-	public function get_request_url( $invoice ) {
+	public function get_request_url($invoice) {
 
         // Endpoint for this request
-		$this->endpoint    = $this->is_sandbox( $invoice ) ? 'https://www.sandbox.paypal.com/cgi-bin/webscr?test_ipn=1&' : 'https://www.paypal.com/cgi-bin/webscr?';
+		$this->endpoint = $this->is_sandbox($invoice) ? 'https://www.sandbox.paypal.com/cgi-bin/webscr?test_ipn=1&' : 'https://www.paypal.com/cgi-bin/webscr?';
 
         // Retrieve paypal args.
-        $paypal_args       = map_deep( $this->get_paypal_args( $invoice ), 'urlencode' );
+        $paypal_args = map_deep($this->get_paypal_args($invoice), 'urlencode');
 
-        if ( $invoice->is_recurring() ) {
+        if ($invoice->is_recurring()) {
             $paypal_args['bn'] = 'GetPaid_Subscribe_WPS_US';
         } else {
             $paypal_args['bn'] = 'GetPaid_ShoppingCart_WPS_US';
         }
 
-        return add_query_arg( $paypal_args, $this->endpoint );
+        return add_query_arg($paypal_args, $this->endpoint);
 
 	}
 
@@ -161,25 +161,25 @@ 
 	 * @param  WPInv_Invoice $invoice Invoice object.
 	 * @return array
 	 */
-	protected function get_paypal_args( $invoice ) {
+	protected function get_paypal_args($invoice) {
 
         // Whether or not to send the line items as one item.
-		$force_one_line_item = apply_filters( 'getpaid_paypal_force_one_line_item', true, $invoice );
+		$force_one_line_item = apply_filters('getpaid_paypal_force_one_line_item', true, $invoice);
 
-		if ( $invoice->is_recurring() || ( wpinv_use_taxes() && wpinv_prices_include_tax() ) ) {
+		if ($invoice->is_recurring() || (wpinv_use_taxes() && wpinv_prices_include_tax())) {
 			$force_one_line_item = true;
 		}
 
 		$paypal_args = apply_filters(
 			'getpaid_paypal_args',
 			array_merge(
-				$this->get_transaction_args( $invoice ),
-				$this->get_line_item_args( $invoice, $force_one_line_item )
+				$this->get_transaction_args($invoice),
+				$this->get_line_item_args($invoice, $force_one_line_item)
 			),
 			$invoice
 		);
 
-		return $this->fix_request_length( $invoice, $paypal_args );
+		return $this->fix_request_length($invoice, $paypal_args);
     }
 
     /**
@@ -188,9 +188,9 @@ 
 	 * @param WPInv_Invoice $invoice Invoice object.
 	 * @return array
 	 */
-	protected function get_transaction_args( $invoice ) {
+	protected function get_transaction_args($invoice) {
 
-		$email = $this->is_sandbox( $invoice ) ? wpinv_get_option( 'paypal_sandbox_email', wpinv_get_option( 'paypal_email', '' ) ) : wpinv_get_option( 'paypal_email', '' );
+		$email = $this->is_sandbox($invoice) ? wpinv_get_option('paypal_sandbox_email', wpinv_get_option('paypal_email', '')) : wpinv_get_option('paypal_email', '');
 		return array(
             'cmd'           => '_cart',
             'business'      => $email,
@@ -201,16 +201,16 @@ 
             'rm'            => is_ssl() ? 2 : 1,
             'upload'        => 1,
             'currency_code' => $invoice->get_currency(), // https://developer.paypal.com/docs/nvp-soap-api/currency-codes/#paypal
-            'return'        => esc_url_raw( $this->get_return_url( $invoice ) ),
-            'cancel_return' => esc_url_raw( $invoice->get_checkout_payment_url() ),
-            'notify_url'    => getpaid_limit_length( $this->notify_url, 255 ),
-            'invoice'       => getpaid_limit_length( $invoice->get_number(), 127 ),
+            'return'        => esc_url_raw($this->get_return_url($invoice)),
+            'cancel_return' => esc_url_raw($invoice->get_checkout_payment_url()),
+            'notify_url'    => getpaid_limit_length($this->notify_url, 255),
+            'invoice'       => getpaid_limit_length($invoice->get_number(), 127),
             'custom'        => $invoice->get_id(),
-            'first_name'    => getpaid_limit_length( $invoice->get_first_name(), 32 ),
-            'last_name'     => getpaid_limit_length( $invoice->get_last_name(), 64 ),
-            'country'       => getpaid_limit_length( $invoice->get_country(), 2 ),
-            'email'         => getpaid_limit_length( $invoice->get_email(), 127 ),
-            'cbt'           => get_bloginfo( 'name' ),
+            'first_name'    => getpaid_limit_length($invoice->get_first_name(), 32),
+            'last_name'     => getpaid_limit_length($invoice->get_last_name(), 64),
+            'country'       => getpaid_limit_length($invoice->get_country(), 2),
+            'email'         => getpaid_limit_length($invoice->get_email(), 127),
+            'cbt'           => get_bloginfo('name'),
         );
 
     }
@@ -222,30 +222,30 @@ 
 	 * @param  bool     $force_one_line_item Create only one item for this invoice.
 	 * @return array
 	 */
-	protected function get_line_item_args( $invoice, $force_one_line_item = false ) {
+	protected function get_line_item_args($invoice, $force_one_line_item = false) {
 
         // Maybe send invoice as a single item.
-		if ( $force_one_line_item ) {
-            return $this->get_line_item_args_single_item( $invoice );
+		if ($force_one_line_item) {
+            return $this->get_line_item_args_single_item($invoice);
         }
 
         // Send each line item individually.
         $line_item_args = array();
 
         // Prepare line items.
-        $this->prepare_line_items( $invoice );
+        $this->prepare_line_items($invoice);
 
         // Add taxes to the cart
-        if ( wpinv_use_taxes() && $invoice->is_taxable() ) {
-            $line_item_args['tax_cart'] = wpinv_sanitize_amount( (float) $invoice->get_total_tax(), 2 );
+        if (wpinv_use_taxes() && $invoice->is_taxable()) {
+            $line_item_args['tax_cart'] = wpinv_sanitize_amount((float) $invoice->get_total_tax(), 2);
         }
 
         // Add discount.
-        if ( $invoice->get_total_discount() > 0 ) {
-            $line_item_args['discount_amount_cart'] = wpinv_sanitize_amount( (float) $invoice->get_total_discount(), 2 );
+        if ($invoice->get_total_discount() > 0) {
+            $line_item_args['discount_amount_cart'] = wpinv_sanitize_amount((float) $invoice->get_total_discount(), 2);
         }
 
-		return array_merge( $line_item_args, $this->get_line_items() );
+		return array_merge($line_item_args, $this->get_line_items());
 
     }
 
@@ -255,11 +255,11 @@ 
 	 * @param  WPInv_Invoice $invoice Invoice object.
 	 * @return array
 	 */
-	protected function get_line_item_args_single_item( $invoice ) {
+	protected function get_line_item_args_single_item($invoice) {
 		$this->delete_line_items();
 
-        $item_name = wp_sprintf( __( 'Invoice %s', 'invoicing' ), $invoice->get_number() );
-		$this->add_line_item( $item_name, 1, wpinv_round_amount( (float) $invoice->get_total(), 2, true ), $invoice->get_id() );
+        $item_name = wp_sprintf(__('Invoice %s', 'invoicing'), $invoice->get_number());
+		$this->add_line_item($item_name, 1, wpinv_round_amount((float) $invoice->get_total(), 2, true), $invoice->get_id());
 
 		return $this->get_line_items();
     }
@@ -283,19 +283,19 @@ 
 	 *
 	 * @param  WPInv_Invoice $invoice Invoice object.
 	 */
-	protected function prepare_line_items( $invoice ) {
+	protected function prepare_line_items($invoice) {
 		$this->delete_line_items();
 
 		// Items.
-		foreach ( $invoice->get_items() as $item ) {
+		foreach ($invoice->get_items() as $item) {
 			$amount   = $item->get_price();
 			$quantity = $invoice->get_template() == 'amount' ? 1 : $item->get_quantity();
-			$this->add_line_item( $item->get_raw_name(), $quantity, $amount, $item->get_id() );
+			$this->add_line_item($item->get_raw_name(), $quantity, $amount, $item->get_id());
         }
 
         // Fees.
-		foreach ( $invoice->get_fees() as $fee => $data ) {
-            $this->add_line_item( $fee, 1, wpinv_sanitize_amount( $data['initial_fee'] ) );
+		foreach ($invoice->get_fees() as $fee => $data) {
+            $this->add_line_item($fee, 1, wpinv_sanitize_amount($data['initial_fee']));
         }
 
     }
@@ -308,20 +308,20 @@ 
 	 * @param  float  $amount Amount.
 	 * @param  string $item_number Item number.
 	 */
-	protected function add_line_item( $item_name, $quantity = 1, $amount = 0.0, $item_number = '' ) {
-		$index = ( count( $this->line_items ) / 4 ) + 1;
+	protected function add_line_item($item_name, $quantity = 1, $amount = 0.0, $item_number = '') {
+		$index = (count($this->line_items) / 4) + 1;
 
 		/**
 		 * Prevent error "Things don't appear to be working at the moment. (https://www.sandbox.paypal.com/webapps/hermes/error)"
 		 */
-		$item_name = str_replace( "#", "", $item_name );
+		$item_name = str_replace("#", "", $item_name);
 
 		$item = apply_filters(
 			'getpaid_paypal_line_item',
 			array(
-				'item_name'   => html_entity_decode( getpaid_limit_length( $item_name ? wp_strip_all_tags( $item_name ) : __( 'Item', 'invoicing' ), 127 ), ENT_NOQUOTES, 'UTF-8' ),
+				'item_name'   => html_entity_decode(getpaid_limit_length($item_name ? wp_strip_all_tags($item_name) : __('Item', 'invoicing'), 127), ENT_NOQUOTES, 'UTF-8'),
 				'quantity'    => (float) $quantity,
-				'amount'      => wpinv_sanitize_amount( (float) $amount, 2 ),
+				'amount'      => wpinv_sanitize_amount((float) $amount, 2),
 				'item_number' => $item_number,
 			),
 			$item_name,
@@ -330,12 +330,12 @@ 
 			$item_number
 		);
 
-		$this->line_items[ 'item_name_' . $index ]   = getpaid_limit_length( $item['item_name'], 127 );
-        $this->line_items[ 'quantity_' . $index ]    = $item['quantity'];
+		$this->line_items['item_name_' . $index] = getpaid_limit_length($item['item_name'], 127);
+        $this->line_items['quantity_' . $index] = $item['quantity'];
 
         // The price or amount of the product, service, or contribution, not including shipping, handling, or tax.
-		$this->line_items[ 'amount_' . $index ]      = $item['amount'] * $item['quantity'];
-		$this->line_items[ 'item_number_' . $index ] = getpaid_limit_length( $item['item_number'], 127 );
+		$this->line_items['amount_' . $index]      = $item['amount'] * $item['quantity'];
+		$this->line_items['item_number_' . $index] = getpaid_limit_length($item['item_number'], 127);
     }
 
     /**
@@ -347,19 +347,19 @@ 
 	 * @param array    $paypal_args Arguments sent to Paypal in the request.
 	 * @return array
 	 */
-	protected function fix_request_length( $invoice, $paypal_args ) {
+	protected function fix_request_length($invoice, $paypal_args) {
 		$max_paypal_length = 2083;
-		$query_candidate   = http_build_query( $paypal_args, '', '&' );
+		$query_candidate   = http_build_query($paypal_args, '', '&');
 
-		if ( strlen( $this->endpoint . $query_candidate ) <= $max_paypal_length ) {
+		if (strlen($this->endpoint . $query_candidate) <= $max_paypal_length) {
 			return $paypal_args;
 		}
 
 		return apply_filters(
 			'getpaid_paypal_args',
 			array_merge(
-				$this->get_transaction_args( $invoice ),
-				$this->get_line_item_args( $invoice, true )
+				$this->get_transaction_args($invoice),
+				$this->get_line_item_args($invoice, true)
 			),
 			$invoice
 		);
@@ -372,10 +372,10 @@ 
 	 * @param  array $paypal_args PayPal args.
 	 * @param  WPInv_Invoice    $invoice Invoice object.
 	 */
-	public function process_subscription( $paypal_args, $invoice ) {
+	public function process_subscription($paypal_args, $invoice) {
 
         // Make sure this is a subscription.
-        if ( ! $invoice->is_recurring() || ! $subscription = getpaid_get_invoice_subscription( $invoice ) ) {
+        if (!$invoice->is_recurring() || !$subscription = getpaid_get_invoice_subscription($invoice)) {
             return $paypal_args;
         }
 
@@ -383,23 +383,23 @@ 
         $paypal_args['cmd'] = '_xclick-subscriptions';
 
         // Subscription name.
-        $paypal_args['item_name'] = wp_sprintf( __( 'Invoice %s', 'invoicing' ), $invoice->get_number() );
+        $paypal_args['item_name'] = wp_sprintf(__('Invoice %s', 'invoicing'), $invoice->get_number());
 
         // Get subscription args.
-        $period                 = strtoupper( substr( $subscription->get_period(), 0, 1 ) );
+        $period                 = strtoupper(substr($subscription->get_period(), 0, 1));
         $interval               = (int) $subscription->get_frequency();
         $bill_times             = (int) $subscription->get_bill_times();
-        $initial_amount         = (float) wpinv_sanitize_amount( $invoice->get_initial_total(), 2 );
-        $recurring_amount       = (float) wpinv_sanitize_amount( $invoice->get_recurring_total(), 2 );
-        $subscription_item      = $invoice->get_recurring( true );
+        $initial_amount         = (float) wpinv_sanitize_amount($invoice->get_initial_total(), 2);
+        $recurring_amount       = (float) wpinv_sanitize_amount($invoice->get_recurring_total(), 2);
+        $subscription_item      = $invoice->get_recurring(true);
 
 		// Convert 365 days to 1 year.
-		if ( 'D' == $period && 365 == $interval ) {
+		if ('D' == $period && 365 == $interval) {
 			$period = 'Y';
 			$interval = 1;
 		}
 
-        if ( $subscription_item->has_free_trial() ) {
+        if ($subscription_item->has_free_trial()) {
 
             $paypal_args['a1'] = 0 == $initial_amount ? 0 : $initial_amount;
 
@@ -409,28 +409,28 @@ 
 			// Trial period.
 			$paypal_args['t1'] = $subscription_item->get_trial_period();
 
-        } elseif ( $initial_amount != $recurring_amount ) {
+        } elseif ($initial_amount != $recurring_amount) {
 
             // No trial period, but initial amount includes a sign-up fee and/or other items, so charge it as a separate period.
 
-            if ( 1 == $bill_times ) {
+            if (1 == $bill_times) {
                 $param_number = 3;
             } else {
                 $param_number = 1;
             }
 
-            $paypal_args[ 'a' . $param_number ] = $initial_amount ? $initial_amount : 0;
+            $paypal_args['a' . $param_number] = $initial_amount ? $initial_amount : 0;
 
             // Sign Up interval
-            $paypal_args[ 'p' . $param_number ] = $interval;
+            $paypal_args['p' . $param_number] = $interval;
 
             // Sign Up unit of duration
-            $paypal_args[ 't' . $param_number ] = $period;
+            $paypal_args['t' . $param_number] = $period;
 
         }
 
         // We have a recurring payment
-		if ( ! isset( $param_number ) || 1 == $param_number ) {
+		if (!isset($param_number) || 1 == $param_number) {
 
 			// Subscription price
 			$paypal_args['a3'] = $recurring_amount;
@@ -444,7 +444,7 @@ 
         }
 
         // Recurring payments
-		if ( 1 == $bill_times || ( $initial_amount != $recurring_amount && ! $subscription_item->has_free_trial() && 2 == $bill_times ) ) {
+		if (1 == $bill_times || ($initial_amount != $recurring_amount && !$subscription_item->has_free_trial() && 2 == $bill_times)) {
 
 			// Non-recurring payments
 			$paypal_args['src'] = 0;
@@ -453,15 +453,15 @@ 
 
 			$paypal_args['src'] = 1;
 
-			if ( $bill_times > 0 ) {
+			if ($bill_times > 0) {
 
 				// An initial period is being used to charge a sign-up fee
-				if ( $initial_amount != $recurring_amount && ! $subscription_item->has_free_trial() ) {
+				if ($initial_amount != $recurring_amount && !$subscription_item->has_free_trial()) {
 					$bill_times--;
 				}
 
                 // Make sure it's not over the max of 52
-                $paypal_args['srt'] = ( $bill_times <= 52 ? absint( $bill_times ) : 52 );
+                $paypal_args['srt'] = ($bill_times <= 52 ? absint($bill_times) : 52);
 
 			}
         }
@@ -470,10 +470,10 @@ 
         $paypal_args['rm'] = 2;
 
         // Get rid of redudant items.
-        foreach ( array( 'item_name_1', 'quantity_1', 'amount_1', 'item_number_1' ) as $arg ) {
+        foreach (array('item_name_1', 'quantity_1', 'amount_1', 'item_number_1') as $arg) {
 
-            if ( isset( $paypal_args[ $arg ] ) ) {
-                unset( $paypal_args[ $arg ] );
+            if (isset($paypal_args[$arg])) {
+                unset($paypal_args[$arg]);
             }
 		}
 
@@ -491,20 +491,20 @@ 
 	 * @since 2.8.24
 	 * @param WPInv_Invoice $invoice Invoice object.
 	 */
-	public function refund_invoice( $invoice ) {
+	public function refund_invoice($invoice) {
 
-		if ( $invoice->get_gateway() !== $this->id ) {
+		if ($invoice->get_gateway() !== $this->id) {
 			return;
 		}
 
-		$mode	= $this->is_sandbox( $invoice ) ? 'sandbox' : 'live';
-		$result = GetPaid_PayPal_API::refund_capture( $invoice->get_transaction_id(), array(), $mode );
+		$mode = $this->is_sandbox($invoice) ? 'sandbox' : 'live';
+		$result = GetPaid_PayPal_API::refund_capture($invoice->get_transaction_id(), array(), $mode);
 
-		if ( is_wp_error( $result ) ) {
+		if (is_wp_error($result)) {
 			$invoice->add_system_note(
 				sprintf(
 					// translators: %s is the error message.
-					__( 'An error occured while trying to refund invoice #%1$s in PayPal: %2$s', 'invoicing' ),
+					__('An error occured while trying to refund invoice #%1$s in PayPal: %2$s', 'invoicing'),
 					$invoice->get_id(),
 					$result->get_error_message()
 				)
@@ -513,7 +513,7 @@ 
 			$invoice->add_system_note(
 				sprintf(
 					// translators: %s is the refund ID.
-					__( 'Successfully refunded invoice #%1$s in PayPal. Refund ID: %2$s', 'invoicing' ),
+					__('Successfully refunded invoice #%1$s in PayPal. Refund ID: %2$s', 'invoicing'),
 					$invoice->get_id(),
 					$result->id
 				)
@@ -527,50 +527,50 @@ 
 	 * @since 2.8.24
 	 * @param WPInv_Subscription $subscription Subscription object.
 	 */
-	public function subscription_cancelled( $subscription ) {
+	public function subscription_cancelled($subscription) {
 
-		if ( $subscription->get_gateway() != $this->id ) {
+		if ($subscription->get_gateway() != $this->id) {
 			return;
 		}
 
 		$invoice = $subscription->get_parent_invoice();
 
 		// Abort if the parent invoice does not exist.
-		if ( ! $invoice->exists() ) {
+		if (!$invoice->exists()) {
 			return;
 		}
 
-		$mode	= $this->is_sandbox( $invoice ) ? 'sandbox' : 'live';
+		$mode = $this->is_sandbox($invoice) ? 'sandbox' : 'live';
 		$result = GetPaid_PayPal_API::cancel_subscription( 
 			$invoice->get_remote_subscription_id(), 
 			array(
-				'reason' => __(' Customer requested cancellation', 'invoicing' ),
+				'reason' => __(' Customer requested cancellation', 'invoicing'),
 			), 
 			$mode 
 		);
 
-		if ( is_wp_error( $result ) ) {
+		if (is_wp_error($result)) {
 
 			$error = sprintf(
 				// translators: %s is the subscription ID.
-				__( 'An error occured while trying to cancel subscription #%s in PayPal.', 'invoicing' ),
+				__('An error occured while trying to cancel subscription #%s in PayPal.', 'invoicing'),
 				$subscription->get_id()
 			);
 
-			getpaid_admin()->show_error( $error . ' ' . $result->get_error_message() );
+			getpaid_admin()->show_error($error . ' ' . $result->get_error_message());
 
-			if ( ! is_admin() ) {
-				wpinv_set_error( $result->get_error_code(), $error );
+			if (!is_admin()) {
+				wpinv_set_error($result->get_error_code(), $error);
 			}
 
 			return;
 		}
 
-		if ( is_admin() ) {
+		if (is_admin()) {
 			getpaid_admin()->show_success(
 				sprintf(
 					// translators: %s is the subscription ID.
-					__( 'Successfully cancelled subscription #%s in PayPal.', 'invoicing' ),
+					__('Successfully cancelled subscription #%s in PayPal.', 'invoicing'),
 					$subscription->get_id()
 				)
 			);
@@ -584,7 +584,7 @@ 
 	 * @return void
 	 */
 	public function verify_ipn() {
-        new GetPaid_Paypal_Gateway_IPN_Handler( $this );
+        new GetPaid_Paypal_Gateway_IPN_Handler($this);
     }
 
     /**
@@ -593,7 +593,7 @@ 
     public function sandbox_notice() {
 
         return sprintf(
-			__( 'SANDBOX ENABLED. You can use sandbox testing accounts only. See the %1$sPayPal Sandbox Testing Guide%2$s for more details.', 'invoicing' ),
+			__('SANDBOX ENABLED. You can use sandbox testing accounts only. See the %1$sPayPal Sandbox Testing Guide%2$s for more details.', 'invoicing'),
 			'<a href="https://developer.paypal.com/docs/classic/lifecycle/ug_sandbox/">',
 			'</a>'
 		);
@@ -605,41 +605,41 @@ 
 	 *
 	 * @param array $admin_settings
 	 */
-	public function admin_settings( $admin_settings ) {
+	public function admin_settings($admin_settings) {
 
         $currencies = sprintf(
-            __( 'Supported Currencies: %s', 'invoicing' ),
-            implode( ', ', $this->currencies )
+            __('Supported Currencies: %s', 'invoicing'),
+            implode(', ', $this->currencies)
         );
 
         $admin_settings['paypal_active']['desc'] .= " ($currencies)";
-        $admin_settings['paypal_desc']['std']     = __( 'Pay via PayPal: you can pay with your credit card if you don\'t have a PayPal account.', 'invoicing' );
+        $admin_settings['paypal_desc']['std']     = __('Pay via PayPal: you can pay with your credit card if you don\'t have a PayPal account.', 'invoicing');
 
 		// Access tokens.
-		$live_email      = wpinv_get_option( 'paypal_email' );
-		$sandbox_email   = wpinv_get_option( 'paypal_sandbox_email' );
+		$live_email      = wpinv_get_option('paypal_email');
+		$sandbox_email   = wpinv_get_option('paypal_sandbox_email');
 
 		$admin_settings['paypal_connect'] = array(
 			'type' => 'hook',
 			'id'   => 'paypal_connect',
-			'name' => __( 'Connect to PayPal', 'invoicing' ),
+			'name' => __('Connect to PayPal', 'invoicing'),
 		);
 
         $admin_settings['paypal_email'] = array(
             'type'  => 'text',
 			'class' => 'live-auth-data',
             'id'    => 'paypal_email',
-            'name'  => __( 'Live Email Address', 'invoicing' ),
-            'desc'  => __( 'The email address of your PayPal account.', 'invoicing' ),
+            'name'  => __('Live Email Address', 'invoicing'),
+            'desc'  => __('The email address of your PayPal account.', 'invoicing'),
         );
 
 		$admin_settings['paypal_sandbox_email'] = array(
             'type'  => 'text',
 			'class' => 'sandbox-auth-data',
             'id'    => 'paypal_sandbox_email',
-            'name'  => __( 'Sandbox Email Address', 'invoicing' ),
-            'desc'  => __( 'The email address of your sandbox PayPal account.', 'invoicing' ),
-			'std'   => wpinv_get_option( 'paypal_email', '' ),
+            'name'  => __('Sandbox Email Address', 'invoicing'),
+            'desc'  => __('The email address of your sandbox PayPal account.', 'invoicing'),
+			'std'   => wpinv_get_option('paypal_email', ''),
         );
 
 		// Client ID and secret.
@@ -647,41 +647,41 @@ 
 			'type'  => 'text',
 			'class' => 'live-auth-data',
 			'id'    => 'paypal_client_id',
-			'name'  => __( 'Live Client ID', 'invoicing' ),
-			'desc'  => __( 'The client ID of your PayPal account. You can retrieve this from your PayPal developer account.', 'invoicing' ),
+			'name'  => __('Live Client ID', 'invoicing'),
+			'desc'  => __('The client ID of your PayPal account. You can retrieve this from your PayPal developer account.', 'invoicing'),
 		);
 
 		$admin_settings['paypal_sandbox_client_id'] = array(
 			'type'  => 'text',
 			'class' => 'sandbox-auth-data',
 			'id'    => 'paypal_sandbox_client_id',
-			'name'  => __( 'Sandbox Client ID', 'invoicing' ),
-			'desc'  => __( 'The client ID of your sandbox PayPal account. You can retrieve this from your PayPal developer account.', 'invoicing' ),
-			'std'   => wpinv_get_option( 'paypal_client_id', '' ),
+			'name'  => __('Sandbox Client ID', 'invoicing'),
+			'desc'  => __('The client ID of your sandbox PayPal account. You can retrieve this from your PayPal developer account.', 'invoicing'),
+			'std'   => wpinv_get_option('paypal_client_id', ''),
 		);
 
 		$admin_settings['paypal_secret'] = array(
 			'type'  => 'text',
 			'class' => 'live-auth-data',
 			'id'    => 'paypal_secret',
-			'name'  => __( 'Live Secret', 'invoicing' ),
-			'desc'  => __( 'The secret of your PayPal account. You can retrieve this from your PayPal developer account.', 'invoicing' ),
+			'name'  => __('Live Secret', 'invoicing'),
+			'desc'  => __('The secret of your PayPal account. You can retrieve this from your PayPal developer account.', 'invoicing'),
 		);
 
 		$admin_settings['paypal_sandbox_secret'] = array(
 			'type'  => 'text',
 			'class' => 'sandbox-auth-data',
 			'id'    => 'paypal_sandbox_secret',
-			'name'  => __( 'Sandbox Secret', 'invoicing' ),
-			'desc'  => __( 'The secret of your sandbox PayPal account. You can retrieve this from your PayPal developer account.', 'invoicing' ),
+			'name'  => __('Sandbox Secret', 'invoicing'),
+			'desc'  => __('The secret of your sandbox PayPal account. You can retrieve this from your PayPal developer account.', 'invoicing'),
 		);
 
         $admin_settings['paypal_ipn_url'] = array(
             'type'     => 'ipn_url',
             'id'       => 'paypal_ipn_url',
-            'name'     => __( 'IPN Url', 'invoicing' ),
+            'name'     => __('IPN Url', 'invoicing'),
             'std'      => $this->notify_url,
-            'desc'     => __( "If you've not enabled IPNs in your paypal account, use the above URL to enable them.", 'invoicing' ) . ' <a href="https://developer.paypal.com/docs/api-basics/notifications/ipn/"><em>' . __( 'Learn more.', 'invoicing' ) . '</em></a>',
+            'desc'     => __("If you've not enabled IPNs in your paypal account, use the above URL to enable them.", 'invoicing') . ' <a href="https://developer.paypal.com/docs/api-basics/notifications/ipn/"><em>' . __('Learn more.', 'invoicing') . '</em></a>',
             'readonly' => true,
         );
 
@@ -694,9 +694,9 @@ 
 	 * @param string $url
 	 * @param WPInv_Subscription $subscription
 	 */
-	public function filter_cancel_subscription_url( $url, $subscription ) {
+	public function filter_cancel_subscription_url($url, $subscription) {
 
-		if ( $this->id !== $subscription->get_gateway() ) {
+		if ($this->id !== $subscription->get_gateway()) {
 			return $url;
 		}
 
@@ -704,16 +704,16 @@ 
 		$profile_id = $subscription->get_profile_id();
 
 		// Bail if no profile ID.
-		if ( empty( $profile_id ) ) {
+		if (empty($profile_id)) {
 			return $url;
 		}
 
 		$cancel_url = 'https://www.paypal.com/myaccount/autopay/connect/%s/cancel';
-		if ( $this->is_sandbox( $subscription->get_parent_payment() ) ) {
+		if ($this->is_sandbox($subscription->get_parent_payment())) {
 			$cancel_url = 'https://www.sandbox.paypal.com/myaccount/autopay/connect/%s/cancel';
 		}
 
-		return sprintf( $cancel_url, $profile_id );
+		return sprintf($cancel_url, $profile_id);
 	}
 
 	/**
@@ -723,8 +723,8 @@ 
      * @param array $data
      * @return string
 	 */
-	public static function maybe_get_connect_url( $url = '', $data = array() ) {
-		return self::get_connect_url( false, urldecode( $data['redirect'] ) );
+	public static function maybe_get_connect_url($url = '', $data = array()) {
+		return self::get_connect_url(false, urldecode($data['redirect']));
 	}
 
 	/**
@@ -735,25 +735,25 @@ 
 	 * @param string $redirect
      * @return string
 	 */
-	public static function get_connect_url( $is_sandbox, $redirect = '' ) {
+	public static function get_connect_url($is_sandbox, $redirect = '') {
 
         $redirect_url = add_query_arg(
             array(
                 'getpaid-admin-action' => 'connect_paypal',
                 'page'                 => 'wpinv-settings',
-                'live_mode'            => (int) empty( $is_sandbox ),
+                'live_mode'            => (int) empty($is_sandbox),
                 'tab'                  => 'gateways',
                 'section'              => 'paypal',
-                'getpaid-nonce'        => wp_create_nonce( 'getpaid-nonce' ),
-				'redirect'             => urlencode( $redirect ),
+                'getpaid-nonce'        => wp_create_nonce('getpaid-nonce'),
+				'redirect'             => urlencode($redirect),
             ),
-            admin_url( 'admin.php' )
+            admin_url('admin.php')
         );
 
         return add_query_arg(
             array(
-                'live_mode'    => (int) empty( $is_sandbox ),
-                'redirect_url' => urlencode( str_replace( '&amp;', '&', $redirect_url ) ),
+                'live_mode'    => (int) empty($is_sandbox),
+                'redirect_url' => urlencode(str_replace('&amp;', '&', $redirect_url)),
             ),
             'https://ayecode.io/oauth/paypal'
         );
@@ -769,10 +769,10 @@ 
 
         ?>
 			<div class="wpinv-paypal-connect-live">
-				<a class="button button-primary" href="<?php echo esc_url( self::get_connect_url( false ) ); ?>"><?php esc_html_e( 'Connect to PayPal', 'invoicing' ); ?></a>
+				<a class="button button-primary" href="<?php echo esc_url(self::get_connect_url(false)); ?>"><?php esc_html_e('Connect to PayPal', 'invoicing'); ?></a>
 			</div>
 			<div class="wpinv-paypal-connect-sandbox">
-				<a class="button button-primary" href="<?php echo esc_url( self::get_connect_url( true ) ); ?>"><?php esc_html_e( 'Connect to PayPal Sandbox', 'invoicing' ); ?></a>
+				<a class="button button-primary" href="<?php echo esc_url(self::get_connect_url(true)); ?>"><?php esc_html_e('Connect to PayPal Sandbox', 'invoicing'); ?></a>
 			</div>
 
             <script>
@@ -813,26 +813,26 @@ 
 	 * @param array $data Connection data.
 	 * @return void
 	 */
-	public function connect_paypal( $data ) {
+	public function connect_paypal($data) {
 
 		$sandbox      = $this->is_sandbox();
-		$data         = wp_unslash( $data );
-		$access_token = empty( $data['access_token'] ) ? '' : sanitize_text_field( $data['access_token'] );
+		$data         = wp_unslash($data);
+		$access_token = empty($data['access_token']) ? '' : sanitize_text_field($data['access_token']);
 
-		if ( isset( $data['live_mode'] ) ) {
-			$sandbox = empty( $data['live_mode'] );
+		if (isset($data['live_mode'])) {
+			$sandbox = empty($data['live_mode']);
 		}
 
-		wpinv_update_option( 'paypal_sandbox', (int) $sandbox );
-		wpinv_update_option( 'paypal_active', 1 );
+		wpinv_update_option('paypal_sandbox', (int) $sandbox);
+		wpinv_update_option('paypal_active', 1);
 
-		if ( ! empty( $data['error_description'] ) ) {
-			getpaid_admin()->show_error( wp_kses_post( urldecode( $data['error_description'] ) ) );
+		if (!empty($data['error_description'])) {
+			getpaid_admin()->show_error(wp_kses_post(urldecode($data['error_description'])));
 		} else {
 
 			// Retrieve the user info.
 			$user_info = wp_remote_get(
-				! $sandbox ? 'https://api-m.paypal.com/v1/identity/oauth2/userinfo?schema=paypalv1.1' : 'https://api-m.sandbox.paypal.com/v1/identity/oauth2/userinfo?schema=paypalv1.1',
+				!$sandbox ? 'https://api-m.paypal.com/v1/identity/oauth2/userinfo?schema=paypalv1.1' : 'https://api-m.sandbox.paypal.com/v1/identity/oauth2/userinfo?schema=paypalv1.1',
 				array(
 
 					'headers' => array(
@@ -843,33 +843,33 @@ 
 				)
 			);
 
-			if ( is_wp_error( $user_info ) ) {
-				getpaid_admin()->show_error( wp_kses_post( $user_info->get_error_message() ) );
+			if (is_wp_error($user_info)) {
+				getpaid_admin()->show_error(wp_kses_post($user_info->get_error_message()));
 			} else {
 
 				// Create application.
-				$user_info = json_decode( wp_remote_retrieve_body( $user_info ) );
+				$user_info = json_decode(wp_remote_retrieve_body($user_info));
 
-				if ( $sandbox ) {
-					wpinv_update_option( 'paypal_sandbox_email', sanitize_email( $user_info->emails[0]->value ) );
-					wpinv_update_option( 'paypal_sandbox_refresh_token', sanitize_text_field( urldecode( $data['refresh_token'] ) ) );
-					set_transient( 'getpaid_paypal_sandbox_access_token', sanitize_text_field( urldecode( $data['access_token'] ) ), (int) $data['expires_in'] );
-					getpaid_admin()->show_success( __( 'Successfully connected your PayPal sandbox account', 'invoicing' ) );
+				if ($sandbox) {
+					wpinv_update_option('paypal_sandbox_email', sanitize_email($user_info->emails[0]->value));
+					wpinv_update_option('paypal_sandbox_refresh_token', sanitize_text_field(urldecode($data['refresh_token'])));
+					set_transient('getpaid_paypal_sandbox_access_token', sanitize_text_field(urldecode($data['access_token'])), (int) $data['expires_in']);
+					getpaid_admin()->show_success(__('Successfully connected your PayPal sandbox account', 'invoicing'));
 				} else {
-					wpinv_update_option( 'paypal_email', sanitize_email( $user_info->emails[0]->value ) );
-					wpinv_update_option( 'paypal_refresh_token', sanitize_text_field( urldecode( $data['refresh_token'] ) ) );
-					set_transient( 'getpaid_paypal_access_token', sanitize_text_field( urldecode( $data['access_token'] ) ), (int) $data['expires_in'] );
-					getpaid_admin()->show_success( __( 'Successfully connected your PayPal account', 'invoicing' ) );
+					wpinv_update_option('paypal_email', sanitize_email($user_info->emails[0]->value));
+					wpinv_update_option('paypal_refresh_token', sanitize_text_field(urldecode($data['refresh_token'])));
+					set_transient('getpaid_paypal_access_token', sanitize_text_field(urldecode($data['access_token'])), (int) $data['expires_in']);
+					getpaid_admin()->show_success(__('Successfully connected your PayPal account', 'invoicing'));
 				}
 			}
 		}
 
-		$redirect = empty( $data['redirect'] ) ? admin_url( 'admin.php?page=wpinv-settings&tab=gateways&section=paypal' ) : urldecode( $data['redirect'] );
+		$redirect = empty($data['redirect']) ? admin_url('admin.php?page=wpinv-settings&tab=gateways&section=paypal') : urldecode($data['redirect']);
 
-		if ( isset( $data['step'] ) ) {
-			$redirect = add_query_arg( 'step', $data['step'], $redirect );
+		if (isset($data['step'])) {
+			$redirect = add_query_arg('step', $data['step'], $redirect);
 		}
-		wp_redirect( $redirect );
+		wp_redirect($redirect);
 		exit;
 	}