AyeCode / invoicing

includes/class-wpinv-discount.php

Indentation +668 added lines, -668 removed lines

@@ -33,173 +33,173 @@ 
  */
 class WPInv_Discount {
 	
-	/**
-	 * Discount ID.
-	 *
-	 * @since 1.0.15
-	 * @var integer|null
-	 */
-	public $ID = null;
-
-	/**
-	 * Old discount status.
-	 *
-	 * @since 1.0.15
-	 * @var string
-	 */
-	public $old_status = 'draft';
+    /**
+     * Discount ID.
+     *
+     * @since 1.0.15
+     * @var integer|null
+     */
+    public $ID = null;
+
+    /**
+     * Old discount status.
+     *
+     * @since 1.0.15
+     * @var string
+     */
+    public $old_status = 'draft';
 	
-	/**
-	 * Data array.
-	 *
-	 * @since 1.0.15
-	 * @var array
-	 */
-	protected $data = array();
-
-	/**
-	 * Discount constructor.
-	 *
-	 * @param int|array|string|WPInv_Discount $discount discount data, object, ID or code.
-	 * @since 1.0.15
-	 */
-	public function __construct( $discount = array() ) {
+    /**
+     * Data array.
+     *
+     * @since 1.0.15
+     * @var array
+     */
+    protected $data = array();
+
+    /**
+     * Discount constructor.
+     *
+     * @param int|array|string|WPInv_Discount $discount discount data, object, ID or code.
+     * @since 1.0.15
+     */
+    public function __construct( $discount = array() ) {
         
         // If the discount is an instance of this class...
-		if ( $discount instanceof WPInv_Discount ) {
-			$this->init( $discount->data );
-			return;
+        if ( $discount instanceof WPInv_Discount ) {
+            $this->init( $discount->data );
+            return;
         }
         
         // If the discount is an array of discount details...
         if ( is_array( $discount ) ) {
-			$this->init( $discount );
-			return;
-		}
+            $this->init( $discount );
+            return;
+        }
 		
-		// Try fetching the discount by its post id.
-		$data = false;
+        // Try fetching the discount by its post id.
+        $data = false;
 		
-		if ( ! empty( $discount ) && is_numeric( $discount ) ) {
-			$discount = absint( $discount );
-			$data = self::get_data_by( 'id', $discount );
-		}
-
-		if ( is_array( $data ) ) {
-			$this->init( $data );
-			return;
-		}
+        if ( ! empty( $discount ) && is_numeric( $discount ) ) {
+            $discount = absint( $discount );
+            $data = self::get_data_by( 'id', $discount );
+        }
+
+        if ( is_array( $data ) ) {
+            $this->init( $data );
+            return;
+        }
 		
-		// Try fetching the discount by its discount code.
-		if ( ! empty( $discount ) && is_scalar( $discount ) ) {
-			$data = self::get_data_by( 'discount_code', $discount );
-		}
-
-		if ( is_array( $data ) ) {
-			$this->init( $data );
-			return;
-		} 
+        // Try fetching the discount by its discount code.
+        if ( ! empty( $discount ) && is_scalar( $discount ) ) {
+            $data = self::get_data_by( 'discount_code', $discount );
+        }
+
+        if ( is_array( $data ) ) {
+            $this->init( $data );
+            return;
+        } 
 		
-		// If we are here then the discount does not exist.
-		$this->init( array() );
-	}
+        // If we are here then the discount does not exist.
+        $this->init( array() );
+    }
 	
-	/**
-	 * Sets up object properties
-	 *
-	 * @since 1.0.15
-	 * @param array $data An array containing the discount's data
-	 */
-	public function init( $data ) {
-		$data       	  = self::sanitize_discount_data( $data );
-		$this->data 	  = $data;
-		$this->old_status = $data['status'];
-		$this->ID   	  = $data['ID'];
-	}
+    /**
+     * Sets up object properties
+     *
+     * @since 1.0.15
+     * @param array $data An array containing the discount's data
+     */
+    public function init( $data ) {
+        $data       	  = self::sanitize_discount_data( $data );
+        $this->data 	  = $data;
+        $this->old_status = $data['status'];
+        $this->ID   	  = $data['ID'];
+    }
 	
-	/**
-	 * Fetch a discount from the db/cache
-	 *
-	 *
-	 * @static
-	 * @param string $field The field to query against: 'ID', 'discount_code'
-	 * @param string|int $value The field value
-	 * @since 1.0.15
-	 * @return array|bool array of discount details on success. False otherwise.
-	 */
-	public static function get_data_by( $field, $value ) {
-
-		if ( 'id' == strtolower( $field ) ) {
-			// Make sure the value is numeric to avoid casting objects, for example,
-			// to int 1.
-			if ( ! is_numeric( $value ) )
-				return false;
-			$value = intval( $value );
-			if ( $value < 1 )
-				return false;
-		}
-
-		if ( ! $value || ! is_string( $field ) ) {
-			return false;
-		}
+    /**
+     * Fetch a discount from the db/cache
+     *
+     *
+     * @static
+     * @param string $field The field to query against: 'ID', 'discount_code'
+     * @param string|int $value The field value
+     * @since 1.0.15
+     * @return array|bool array of discount details on success. False otherwise.
+     */
+    public static function get_data_by( $field, $value ) {
+
+        if ( 'id' == strtolower( $field ) ) {
+            // Make sure the value is numeric to avoid casting objects, for example,
+            // to int 1.
+            if ( ! is_numeric( $value ) )
+                return false;
+            $value = intval( $value );
+            if ( $value < 1 )
+                return false;
+        }
+
+        if ( ! $value || ! is_string( $field ) ) {
+            return false;
+        }
 		
-		$field = trim( $field );
-
-		// prepare query args
-		switch ( strtolower( $field ) ) {
-			case 'id':
-				$discount_id = $value;
-				$args		 = array( 'include' => array( $value ) );
-				break;
-			case 'discount_code':
-			case 'code':
-				$value       = trim( $value );
-				$discount_id = wp_cache_get( $value, 'WPInv_Discount_Codes' );
-				$args		 = array( 'meta_key' => '_wpi_discount_code', 'meta_value' => $value );
-				break;
-			case 'name':
-				$discount_id = 0;
-				$args		 = array( 'name' => trim( $value ) );
-				break;
-			default:
-				$args		 = apply_filters( "wpinv_discount_get_data_by_{$field}_args", null, $value );
-				if ( ! is_array( $args ) ) {
-					return apply_filters( "wpinv_discount_get_data_by_$field", false, $value );
-				}
-
-		}
-
-		// Check if there is a cached value.
-		if ( ! empty( $discount_id ) && $discount = wp_cache_get( (int) $discount_id, 'WPInv_Discounts' ) ) {
-			return $discount;
-		}
-
-		$args = array_merge(
-			$args,
-			array(
-				'post_type'      => 'wpi_discount',
-				'posts_per_page' => 1,
-				'post_status'    => array( 'publish', 'pending', 'draft', 'expired' )
-			)
-		);
-
-		$discount = get_posts( $args );
+        $field = trim( $field );
+
+        // prepare query args
+        switch ( strtolower( $field ) ) {
+            case 'id':
+                $discount_id = $value;
+                $args		 = array( 'include' => array( $value ) );
+                break;
+            case 'discount_code':
+            case 'code':
+                $value       = trim( $value );
+                $discount_id = wp_cache_get( $value, 'WPInv_Discount_Codes' );
+                $args		 = array( 'meta_key' => '_wpi_discount_code', 'meta_value' => $value );
+                break;
+            case 'name':
+                $discount_id = 0;
+                $args		 = array( 'name' => trim( $value ) );
+                break;
+            default:
+                $args		 = apply_filters( "wpinv_discount_get_data_by_{$field}_args", null, $value );
+                if ( ! is_array( $args ) ) {
+                    return apply_filters( "wpinv_discount_get_data_by_$field", false, $value );
+                }
+
+        }
+
+        // Check if there is a cached value.
+        if ( ! empty( $discount_id ) && $discount = wp_cache_get( (int) $discount_id, 'WPInv_Discounts' ) ) {
+            return $discount;
+        }
+
+        $args = array_merge(
+            $args,
+            array(
+                'post_type'      => 'wpi_discount',
+                'posts_per_page' => 1,
+                'post_status'    => array( 'publish', 'pending', 'draft', 'expired' )
+            )
+        );
+
+        $discount = get_posts( $args );
 				
-		if( empty( $discount ) ) {
-			return false;
-		}
+        if( empty( $discount ) ) {
+            return false;
+        }
 
-		$discount = $discount[0];
+        $discount = $discount[0];
 		
-		// Prepare the return data.
-		$return = array(
+        // Prepare the return data.
+        $return = array(
             'ID'                          => $discount->ID,
             'code'                        => get_post_meta( $discount->ID, '_wpi_discount_code', true ),
             'amount'                      => get_post_meta( $discount->ID, '_wpi_discount_amount', true ),
             'date_created'                => $discount->post_date,
-			'date_modified'               => $discount->post_modified,
-			'status'               		  => $discount->post_status,
-			'start'                  	  => get_post_meta( $discount->ID, '_wpi_discount_start', true ),
+            'date_modified'               => $discount->post_modified,
+            'status'               		  => $discount->post_status,
+            'start'                  	  => get_post_meta( $discount->ID, '_wpi_discount_start', true ),
             'expiration'                  => get_post_meta( $discount->ID, '_wpi_discount_expiration', true ),
             'type'               		  => get_post_meta( $discount->ID, '_wpi_discount_type', true ),
             'description'                 => $discount->post_excerpt,
@@ -213,38 +213,38 @@ 
             'max_total'                   => get_post_meta( $discount->ID, '_wpi_discount_max_total', true ),
         );
 		
-		$return = self::sanitize_discount_data( $return );
-		$return = apply_filters( 'wpinv_discount_properties', $return );
+        $return = self::sanitize_discount_data( $return );
+        $return = apply_filters( 'wpinv_discount_properties', $return );
 
-		// Update the cache with our data
-		wp_cache_add( $discount->ID, $return, 'WPInv_Discounts' );
-		wp_cache_add( $return['code'], $discount->ID, 'WPInv_Discount_Codes' );
+        // Update the cache with our data
+        wp_cache_add( $discount->ID, $return, 'WPInv_Discounts' );
+        wp_cache_add( $return['code'], $discount->ID, 'WPInv_Discount_Codes' );
 
-		return $return;
-	}
+        return $return;
+    }
 	
-	/**
-	 * Sanitizes discount data
-	 *
-	 * @static
-	 * @since 1.0.15
-	 * @access public
-	 *
-	 * @return array the sanitized data
-	 */
-	public static function sanitize_discount_data( $data ) {
+    /**
+     * Sanitizes discount data
+     *
+     * @static
+     * @since 1.0.15
+     * @access public
+     *
+     * @return array the sanitized data
+     */
+    public static function sanitize_discount_data( $data ) {
 		
-		$allowed_discount_types = array_keys( wpinv_get_discount_types() );
+        $allowed_discount_types = array_keys( wpinv_get_discount_types() );
 		
-		$return = array(
+        $return = array(
             'ID'                          => null,
             'code'                        => '',
             'amount'                      => 0,
             'date_created'                => current_time('mysql'),
             'date_modified'               => current_time('mysql'),
-			'expiration'                  => null,
-			'start'                  	  => current_time('mysql'),
-			'status'                  	  => 'draft',
+            'expiration'                  => null,
+            'start'                  	  => current_time('mysql'),
+            'status'                  	  => 'draft',
             'type'               		  => 'percent',
             'description'                 => '',
             'uses'                        => 0,
@@ -254,426 +254,426 @@ 
             'max_uses'                    => 0,
             'is_recurring'                => false,
             'min_total'                   => '',
-			'max_total'              	  => '',
-		);
+            'max_total'              	  => '',
+        );
 		
 				
-		// Arrays only please.
-		if ( ! is_array( $data ) ) {
+        // Arrays only please.
+        if ( ! is_array( $data ) ) {
             return $return;
         }
 
-		// If an id is provided, ensure it is a valid discount.
+        // If an id is provided, ensure it is a valid discount.
         if ( ! empty( $data['ID'] ) && ( ! is_numeric( $data['ID'] ) || 'wpi_discount' !== get_post_type( $data['ID'] ) ) ) {
             return $return;
-		}
+        }
 
         $return = array_merge( $return, $data );
 
         // Sanitize some keys.
         $return['amount']         = wpinv_sanitize_amount( $return['amount'] );
-		$return['is_single_use']  = (bool) $return['is_single_use'];
-		$return['is_recurring']   = (bool) $return['is_recurring'];
-		$return['uses']	          = (int) $return['uses'];
-		$return['max_uses']	      = (int) $return['max_uses'];
-		$return['min_total'] 	  = wpinv_sanitize_amount( $return['min_total'] );
+        $return['is_single_use']  = (bool) $return['is_single_use'];
+        $return['is_recurring']   = (bool) $return['is_recurring'];
+        $return['uses']	          = (int) $return['uses'];
+        $return['max_uses']	      = (int) $return['max_uses'];
+        $return['min_total'] 	  = wpinv_sanitize_amount( $return['min_total'] );
         $return['max_total'] 	  = wpinv_sanitize_amount( $return['max_total'] );
 
-		// Trim all values.
-		$return = wpinv_clean( $return );
+        // Trim all values.
+        $return = wpinv_clean( $return );
 		
-		// Ensure the discount type is supported.
+        // Ensure the discount type is supported.
         if ( ! in_array( $return['type'], $allowed_discount_types, true ) ) {
             $return['type'] = 'percent';
-		}
-		$return['type_name'] = wpinv_get_discount_type_name( $return['type'] );
+        }
+        $return['type_name'] = wpinv_get_discount_type_name( $return['type'] );
 		
-		// Do not offer more than a 100% discount.
-		if ( $return['type'] == 'percent' && (float) $return['amount'] > 100 ) {
-			$return['amount'] = 100;
-		}
-
-		// Format dates.
-		foreach( wpinv_parse_list( 'date_created date_modified expiration start') as $prop ) {
-			if( ! empty( $return[$prop] ) ) {
-				$return[$prop]      = date_i18n( 'Y-m-d H:i:s', strtotime( $return[$prop] ) );
-			}
-		}
-
-		// Formart items.
-		foreach( array( 'excluded_items', 'items' ) as $prop ) {
-
-			if( ! empty( $return[$prop] ) ) {
-				// Ensure that the property is an array of non-empty integers.
-				$return[$prop]      = array_filter( array_map( 'intval', wpinv_parse_list( $return[$prop] ) ) );
-			} else {
-				$return[$prop]      = array();
-			}
-
-		}
+        // Do not offer more than a 100% discount.
+        if ( $return['type'] == 'percent' && (float) $return['amount'] > 100 ) {
+            $return['amount'] = 100;
+        }
+
+        // Format dates.
+        foreach( wpinv_parse_list( 'date_created date_modified expiration start') as $prop ) {
+            if( ! empty( $return[$prop] ) ) {
+                $return[$prop]      = date_i18n( 'Y-m-d H:i:s', strtotime( $return[$prop] ) );
+            }
+        }
+
+        // Formart items.
+        foreach( array( 'excluded_items', 'items' ) as $prop ) {
+
+            if( ! empty( $return[$prop] ) ) {
+                // Ensure that the property is an array of non-empty integers.
+                $return[$prop]      = array_filter( array_map( 'intval', wpinv_parse_list( $return[$prop] ) ) );
+            } else {
+                $return[$prop]      = array();
+            }
+
+        }
 		
-		return apply_filters( 'wpinv_sanitize_discount_data', $return, $data );
-	}
+        return apply_filters( 'wpinv_sanitize_discount_data', $return, $data );
+    }
 	
-	/**
-	 * Magic method for checking the existence of a certain custom field.
-	 *
-	 * @since 1.0.15
-	 * @access public
-	 *
-	 * @return bool Whether the given discount field is set.
-	 */
-	public function __isset( $key ){
-		return isset( $this->data[$key] ) || method_exists( $this, "get_$key");
-	}
+    /**
+     * Magic method for checking the existence of a certain custom field.
+     *
+     * @since 1.0.15
+     * @access public
+     *
+     * @return bool Whether the given discount field is set.
+     */
+    public function __isset( $key ){
+        return isset( $this->data[$key] ) || method_exists( $this, "get_$key");
+    }
 	
-	/**
-	 * Magic method for accessing discount properties.
-	 *
-	 * @since 1.0.15
-	 * @access public
-	 *
-	 * @param string $key Discount data to retrieve
-	 * @return mixed Value of the given discount property (if set).
-	 */
-	public function __get( $key ) {
-		return $this->get( $key );
-	}
-
-	/**
-	 * Magic method for accessing discount properties.
-	 *
-	 * @since 1.0.15
-	 * @access public
-	 *
-	 * @param string $key Discount data to retrieve
-	 * @return mixed Value of the given discount property (if set).
-	 */
-	public function get( $key ) {
+    /**
+     * Magic method for accessing discount properties.
+     *
+     * @since 1.0.15
+     * @access public
+     *
+     * @param string $key Discount data to retrieve
+     * @return mixed Value of the given discount property (if set).
+     */
+    public function __get( $key ) {
+        return $this->get( $key );
+    }
+
+    /**
+     * Magic method for accessing discount properties.
+     *
+     * @since 1.0.15
+     * @access public
+     *
+     * @param string $key Discount data to retrieve
+     * @return mixed Value of the given discount property (if set).
+     */
+    public function get( $key ) {
 		
-		if ( $key == 'id' ) {
-			$key = 'ID';
-		}
+        if ( $key == 'id' ) {
+            $key = 'ID';
+        }
 		
-		if( method_exists( $this, "get_$key") ) {
-			$value 	= call_user_func( array( $this, "get_$key" ) );
-		} else if( isset( $this->data[$key] ) ) {
-			$value 	= $this->data[$key];
-		} else {
-			$value = null;
-		}
+        if( method_exists( $this, "get_$key") ) {
+            $value 	= call_user_func( array( $this, "get_$key" ) );
+        } else if( isset( $this->data[$key] ) ) {
+            $value 	= $this->data[$key];
+        } else {
+            $value = null;
+        }
 		
-		/**
-		 * Filters a discount's property value.
-		 * 
-		 * The dynamic part ($key) can be any property name e.g items, code, type etc.
-		 * 
-		 * @param mixed          $value    The property's value.
-		 * @param int            $ID       The discount's ID.
-		 * @param WPInv_Discount $discount The discount object.
-		 * @param string         $code     The discount's discount code.
-		 * @param array          $data     The discount's data array.
-		 */
-		return apply_filters( "wpinv_get_discount_{$key}", $value, $this->ID, $this, $this->data['code'], $this->data );
-
-	}
+        /**
+         * Filters a discount's property value.
+         * 
+         * The dynamic part ($key) can be any property name e.g items, code, type etc.
+         * 
+         * @param mixed          $value    The property's value.
+         * @param int            $ID       The discount's ID.
+         * @param WPInv_Discount $discount The discount object.
+         * @param string         $code     The discount's discount code.
+         * @param array          $data     The discount's data array.
+         */
+        return apply_filters( "wpinv_get_discount_{$key}", $value, $this->ID, $this, $this->data['code'], $this->data );
+
+    }
 	
-	/**
-	 * Magic method for setting discount fields.
-	 *
-	 * This method does not update custom fields in the database.
-	 *
-	 * @since 1.0.15
-	 * @access public
-	 *
-	 */
-	public function __set( $key, $value ) {
+    /**
+     * Magic method for setting discount fields.
+     *
+     * This method does not update custom fields in the database.
+     *
+     * @since 1.0.15
+     * @access public
+     *
+     */
+    public function __set( $key, $value ) {
 		
-		if ( 'id' == strtolower( $key ) ) {
+        if ( 'id' == strtolower( $key ) ) {
 			
-			$this->ID = $value;
-			$this->data['ID'] = $value;
-			return;
+            $this->ID = $value;
+            $this->data['ID'] = $value;
+            return;
 			
-		}
+        }
 		
-		/**
-		 * Filters a discount's property value before it is saved.
-		 * 
-		 * 
-		 * 
-		 * The dynamic part ($key) can be any property name e.g items, code, type etc.
-		 * 
-		 * @param mixed          $value    The property's value.
-		 * @param int            $ID       The discount's ID.
-		 * @param WPInv_Discount $discount The discount object.
-		 * @param string         $code     The discount's discount code.
-		 * @param array          $data     The discount's data array.
-		 */
-		$value = apply_filters( "wpinv_set_discount_{$key}", $value, $this->ID, $this, $this->code, $this->data );
-
-		if( method_exists( $this, "set_$key") ) {
-			call_user_func( array( $this, "set_$key" ), $value );
-		} else {
-			$this->data[$key] = $value;
-		}
+        /**
+         * Filters a discount's property value before it is saved.
+         * 
+         * 
+         * 
+         * The dynamic part ($key) can be any property name e.g items, code, type etc.
+         * 
+         * @param mixed          $value    The property's value.
+         * @param int            $ID       The discount's ID.
+         * @param WPInv_Discount $discount The discount object.
+         * @param string         $code     The discount's discount code.
+         * @param array          $data     The discount's data array.
+         */
+        $value = apply_filters( "wpinv_set_discount_{$key}", $value, $this->ID, $this, $this->code, $this->data );
+
+        if( method_exists( $this, "set_$key") ) {
+            call_user_func( array( $this, "set_$key" ), $value );
+        } else {
+            $this->data[$key] = $value;
+        }
 		
-	}
+    }
 	
-	/**
-	 * Saves (or updates) a discount to the database
-	 *
-	 * @since 1.0.15
-	 * @access public
-	 * @return bool
-	 *
-	 */
-	public function save(){
+    /**
+     * Saves (or updates) a discount to the database
+     *
+     * @since 1.0.15
+     * @access public
+     * @return bool
+     *
+     */
+    public function save(){
 		
-		$data = self::sanitize_discount_data( $this->data );
+        $data = self::sanitize_discount_data( $this->data );
 
-		// Should we create a new post?
-		if( ! $data[ 'ID' ] ) {
+        // Should we create a new post?
+        if( ! $data[ 'ID' ] ) {
 
-			$id = wp_insert_post( array(
-				'post_status'           => $data['status'],
-				'post_type'             => 'wpi_discount',
-				'post_excerpt'          => $data['description'],
-			) );
+            $id = wp_insert_post( array(
+                'post_status'           => $data['status'],
+                'post_type'             => 'wpi_discount',
+                'post_excerpt'          => $data['description'],
+            ) );
 
-			if( empty( $id ) ) {
-				return false;
-			}
+            if( empty( $id ) ) {
+                return false;
+            }
 
-			$data[ 'ID' ] = (int) $id;
-			$this->ID = $data[ 'ID' ];
-			$this->data['ID'] = $data[ 'ID' ];
+            $data[ 'ID' ] = (int) $id;
+            $this->ID = $data[ 'ID' ];
+            $this->data['ID'] = $data[ 'ID' ];
 
-		} else {
-			$this->update_status( $data['status'] );
-		}
+        } else {
+            $this->update_status( $data['status'] );
+        }
 
-		$meta = apply_filters( 'wpinv_update_discount', $data, $this->ID, $this );
+        $meta = apply_filters( 'wpinv_update_discount', $data, $this->ID, $this );
 
-		do_action( 'wpinv_pre_update_discount', $meta, $this->ID, $this );
+        do_action( 'wpinv_pre_update_discount', $meta, $this->ID, $this );
 
-		foreach( wpinv_parse_list( 'ID date_created date_modified status description type_name' ) as $prop ) {
-			if ( isset( $meta[$prop] ) ) {
-				unset( $meta[$prop] );
-			}
-		}
+        foreach( wpinv_parse_list( 'ID date_created date_modified status description type_name' ) as $prop ) {
+            if ( isset( $meta[$prop] ) ) {
+                unset( $meta[$prop] );
+            }
+        }
 
-		if( isset( $meta['uses'] ) && empty( $meta['uses'] ) ) {
-			unset( $meta['uses'] );
-		}
+        if( isset( $meta['uses'] ) && empty( $meta['uses'] ) ) {
+            unset( $meta['uses'] );
+        }
 
-		// Save the metadata.
-		foreach( $meta as $key => $value ) {
-			update_post_meta( $this->ID, "_wpi_discount_$key", $value );
-		}
+        // Save the metadata.
+        foreach( $meta as $key => $value ) {
+            update_post_meta( $this->ID, "_wpi_discount_$key", $value );
+        }
 
-		$this->refresh();
+        $this->refresh();
 
-		do_action( 'wpinv_post_update_discount', $meta, $this->ID );
+        do_action( 'wpinv_post_update_discount', $meta, $this->ID );
 
-		return true;		
-	}
+        return true;		
+    }
 
-	/**
-	 * Refreshes the discount data.
-	 *
-	 * @since 1.0.15
-	 * @access public
-	 * @return bool
-	 *
-	 */
-	public function refresh(){
+    /**
+     * Refreshes the discount data.
+     *
+     * @since 1.0.15
+     * @access public
+     * @return bool
+     *
+     */
+    public function refresh(){
 
-		// Empty the cache for this discount.
-		wp_cache_delete( $this->ID, 'WPInv_Discounts' );
-		wp_cache_delete( $this->get( 'code' ), 'WPInv_Discount_Codes' );
+        // Empty the cache for this discount.
+        wp_cache_delete( $this->ID, 'WPInv_Discounts' );
+        wp_cache_delete( $this->get( 'code' ), 'WPInv_Discount_Codes' );
 
-		$data = self::get_data_by( 'id', $this->ID );
-		if( is_array( $data ) ) {
-			$this->init( $data );
-		} else {
-			$this->init( array() );
-		}
+        $data = self::get_data_by( 'id', $this->ID );
+        if( is_array( $data ) ) {
+            $this->init( $data );
+        } else {
+            $this->init( array() );
+        }
 
-	}
+    }
 
-	/**
-	 * Saves (or updates) a discount to the database
-	 *
-	 * @since 1.0.15
-	 * @access public
-	 * @return bool
-	 *
-	 */
-	public function update_status( $status = 'publish' ){
+    /**
+     * Saves (or updates) a discount to the database
+     *
+     * @since 1.0.15
+     * @access public
+     * @return bool
+     *
+     */
+    public function update_status( $status = 'publish' ){
 
 
-		if ( $this->exists() && $this->old_status != $status ) {
+        if ( $this->exists() && $this->old_status != $status ) {
 
-			do_action( 'wpinv_pre_update_discount_status', $this->ID, $this->old_status, $status );
-        	$updated = wp_update_post( array( 'ID' => $this->ID, 'post_status' => $status ) );
-			do_action( 'wpinv_post_update_discount_status', $this->ID, $this->old_status, $status );
+            do_action( 'wpinv_pre_update_discount_status', $this->ID, $this->old_status, $status );
+            $updated = wp_update_post( array( 'ID' => $this->ID, 'post_status' => $status ) );
+            do_action( 'wpinv_post_update_discount_status', $this->ID, $this->old_status, $status );
 
-			$this->refresh();
+            $this->refresh();
 
-			return $updated !== 0;
+            return $updated !== 0;
 			
-		}
+        }
 
-		return false;		
-	}
+        return false;		
+    }
 	
 	
-	/**
-	 * Checks whether a discount exists in the database or not
-	 * 
-	 * @since 1.0.15
-	 */
-	public function exists(){
-		return ! empty( $this->ID );
-	}
+    /**
+     * Checks whether a discount exists in the database or not
+     * 
+     * @since 1.0.15
+     */
+    public function exists(){
+        return ! empty( $this->ID );
+    }
 	
-	// Boolean methods
+    // Boolean methods
 	
-	/**
-	 * Checks the discount type.
-	 * 
-	 * 
-	 * @param  string $type the discount type to check against
-	 * @since 1.0.15
-	 * @return bool
-	 */
-	public function is_type( $type ) {
-		return $this->type == $type;
-	}
+    /**
+     * Checks the discount type.
+     * 
+     * 
+     * @param  string $type the discount type to check against
+     * @since 1.0.15
+     * @return bool
+     */
+    public function is_type( $type ) {
+        return $this->type == $type;
+    }
 	
-	/**
-	 * Checks whether the discount is published or not
-	 * 
-	 * @since 1.0.15
-	 * @return bool
-	 */
-	public function is_active() {
-		return $this->status == 'publish';
-	}
+    /**
+     * Checks whether the discount is published or not
+     * 
+     * @since 1.0.15
+     * @return bool
+     */
+    public function is_active() {
+        return $this->status == 'publish';
+    }
 	
-	/**
-	 * Checks whether the discount is has exided the usage limit or not
-	 * 
-	 * @since 1.0.15
-	 * @return bool
-	 */
-	public function has_exceeded_limit() {
-		if( empty( $this->max_uses ) || empty( $this->uses ) ) { 
-			return false ;
-		}
+    /**
+     * Checks whether the discount is has exided the usage limit or not
+     * 
+     * @since 1.0.15
+     * @return bool
+     */
+    public function has_exceeded_limit() {
+        if( empty( $this->max_uses ) || empty( $this->uses ) ) { 
+            return false ;
+        }
 		
-		$exceeded =  $this->uses >= $this->max_uses;
-		return apply_filters( 'wpinv_is_discount_maxed_out', $exceeded, $this->ID, $this, $this->code );
-	}
+        $exceeded =  $this->uses >= $this->max_uses;
+        return apply_filters( 'wpinv_is_discount_maxed_out', $exceeded, $this->ID, $this, $this->code );
+    }
 	
-	/**
-	 * Checks if the discount is expired
-	 * 
-	 * @since 1.0.15
-	 * @return bool
-	 */
-	public function is_expired() {
-		$expired = empty ( $this->expiration ) ? false : current_time( 'timestamp' ) > strtotime( $this->expiration );
-		return apply_filters( 'wpinv_is_discount_expired', $expired, $this->ID, $this, $this->code );
-	}
-
-	/**
-	 * Checks the discount start date.
-	 * 
-	 * @since 1.0.15
-	 * @return bool
-	 */
-	public function has_started() {
-		$started = empty ( $this->start ) ? true : current_time( 'timestamp' ) > strtotime( $this->start );
-		return apply_filters( 'wpinv_is_discount_started', $started, $this->ID, $this, $this->code );		
-	}
+    /**
+     * Checks if the discount is expired
+     * 
+     * @since 1.0.15
+     * @return bool
+     */
+    public function is_expired() {
+        $expired = empty ( $this->expiration ) ? false : current_time( 'timestamp' ) > strtotime( $this->expiration );
+        return apply_filters( 'wpinv_is_discount_expired', $expired, $this->ID, $this, $this->code );
+    }
+
+    /**
+     * Checks the discount start date.
+     * 
+     * @since 1.0.15
+     * @return bool
+     */
+    public function has_started() {
+        $started = empty ( $this->start ) ? true : current_time( 'timestamp' ) > strtotime( $this->start );
+        return apply_filters( 'wpinv_is_discount_started', $started, $this->ID, $this, $this->code );		
+    }
 	
-	/**
-	 * Check if a discount is valid for a given item id.
-	 *
-	 * @param  int|int[]  $item_ids
-	 * @since 1.0.15
-	 * @return boolean
-	 */
-	public function is_valid_for_items( $item_ids ) {
+    /**
+     * Check if a discount is valid for a given item id.
+     *
+     * @param  int|int[]  $item_ids
+     * @since 1.0.15
+     * @return boolean
+     */
+    public function is_valid_for_items( $item_ids ) {
 		 
-		$item_ids = array_map( 'intval',  wpinv_parse_list( $item_ids ) );
-		$included = array_intersect( $item_ids, $this->items );
-		$excluded = array_intersect( $item_ids, $this->excluded_items );
-
-		if( ! empty( $this->excluded_items ) && ! empty( $excluded ) ) {
-			return false;
-		}
-
-		if( ! empty( $this->items ) && empty( $included ) ) {
-			return false;
-		}
-		return true;
-	}
+        $item_ids = array_map( 'intval',  wpinv_parse_list( $item_ids ) );
+        $included = array_intersect( $item_ids, $this->items );
+        $excluded = array_intersect( $item_ids, $this->excluded_items );
+
+        if( ! empty( $this->excluded_items ) && ! empty( $excluded ) ) {
+            return false;
+        }
+
+        if( ! empty( $this->items ) && empty( $included ) ) {
+            return false;
+        }
+        return true;
+    }
 	
-	/**
-	 * Check if a discount is valid for the given amount
-	 *
-	 * @param  float  $amount The amount to check against
-	 * @since 1.0.15
-	 * @return boolean
-	 */
-	public function is_valid_for_amount( $amount ) {
-		return $this->is_minimum_amount_met( $amount ) && $this->is_maximum_amount_met( $amount );
-	}
-
-	/**
-	 * Checks if the minimum amount is met
-	 *
-	 * @param  float  $amount The amount to check against
-	 * @since 1.0.15
-	 * @return boolean
-	 */
-	public function is_minimum_amount_met( $amount ) {
-		$amount = floatval( $amount );
-		$min_met= ! ( $this->min_total > 0 && $amount < $this->min_total );
-		return apply_filters( 'wpinv_is_discount_min_met', $min_met, $this->ID, $this, $this->code, $amount );
-	}
-
-	/**
-	 * Checks if the maximum amount is met
-	 *
-	 * @param  float  $amount The amount to check against
-	 * @since 1.0.15
-	 * @return boolean
-	 */
-	public function is_maximum_amount_met( $amount ) {
-		$amount = floatval( $amount );
-		$max_met= ! ( $this->max_total > 0 && $amount > $this->max_total );
-		return apply_filters( 'wpinv_is_discount_max_met', $max_met, $this->ID, $this, $this->code, $amount );
-	}
-
-	/**
-	 * Check if a discount is valid for the given user
-	 *
-	 * @param  int|string  $user
-	 * @since 1.0.15
-	 * @return boolean
-	 */
-	public function is_valid_for_user( $user ) {
-		global $wpi_checkout_id;
-
-		if( empty( $user ) || empty( $this->is_single_use ) ) {
-			return true;
-		}
-
-		$user_id = 0;
+    /**
+     * Check if a discount is valid for the given amount
+     *
+     * @param  float  $amount The amount to check against
+     * @since 1.0.15
+     * @return boolean
+     */
+    public function is_valid_for_amount( $amount ) {
+        return $this->is_minimum_amount_met( $amount ) && $this->is_maximum_amount_met( $amount );
+    }
+
+    /**
+     * Checks if the minimum amount is met
+     *
+     * @param  float  $amount The amount to check against
+     * @since 1.0.15
+     * @return boolean
+     */
+    public function is_minimum_amount_met( $amount ) {
+        $amount = floatval( $amount );
+        $min_met= ! ( $this->min_total > 0 && $amount < $this->min_total );
+        return apply_filters( 'wpinv_is_discount_min_met', $min_met, $this->ID, $this, $this->code, $amount );
+    }
+
+    /**
+     * Checks if the maximum amount is met
+     *
+     * @param  float  $amount The amount to check against
+     * @since 1.0.15
+     * @return boolean
+     */
+    public function is_maximum_amount_met( $amount ) {
+        $amount = floatval( $amount );
+        $max_met= ! ( $this->max_total > 0 && $amount > $this->max_total );
+        return apply_filters( 'wpinv_is_discount_max_met', $max_met, $this->ID, $this, $this->code, $amount );
+    }
+
+    /**
+     * Check if a discount is valid for the given user
+     *
+     * @param  int|string  $user
+     * @since 1.0.15
+     * @return boolean
+     */
+    public function is_valid_for_user( $user ) {
+        global $wpi_checkout_id;
+
+        if( empty( $user ) || empty( $this->is_single_use ) ) {
+            return true;
+        }
+
+        $user_id = 0;
         if ( is_int( $user ) ) {
             $user_id = absint( $user );
         } else if ( is_email( $user ) && $user_data = get_user_by( 'email', $user ) ) {
@@ -682,164 +682,164 @@ 
             $user_id = $user_data->ID;
         } else if ( absint( $user ) > 0 ) {
             $user_id = absint( $user );
-		}
+        }
 
-		if ( empty( $user_id ) ) {
-			return true;
-		}
+        if ( empty( $user_id ) ) {
+            return true;
+        }
 		
-		// Get all payments with matching user id
+        // Get all payments with matching user id
         $payments = wpinv_get_invoices( array( 'user' => $user_id, 'limit' => false ) ); 
-		$code     = strtolower( $this->code );
+        $code     = strtolower( $this->code );
 
-		foreach ( $payments as $payment ) {
+        foreach ( $payments as $payment ) {
 
-			// Don't count discount used for current invoice checkout.
-			if ( ! empty( $wpi_checkout_id ) && $wpi_checkout_id == $payment->ID ) {
-				continue;
-			}
+            // Don't count discount used for current invoice checkout.
+            if ( ! empty( $wpi_checkout_id ) && $wpi_checkout_id == $payment->ID ) {
+                continue;
+            }
 			
-			if ( $payment->has_status( array( 'wpi-cancelled', 'wpi-failed' ) ) ) {
-				continue;
-			}
-
-			$discounts = $payment->get_discounts( true );
-			if ( empty( $discounts ) ) {
-				continue;
-			}
-
-			$discounts = array_map( 'strtolower', wpinv_parse_list( $discounts ) );
-			if ( ! empty( $discounts ) && in_array( $code, $discounts ) ) {
-				return false;
-			}
-		}
-
-		return true;
-	}
-
-	/**
-	 * Deletes the discount from the database
-	 *
-	 * @since 1.0.15
-	 * @return boolean
-	 */
-	public function remove() {
-
-		if ( empty( $this->ID ) ) {
-			return true;
-		}
-
-		do_action( 'wpinv_pre_delete_discount', $this->ID, $this->data );
-		wp_cache_delete( $this->ID, 'WPInv_Discounts' );
-    	wp_delete_post( $this->ID, true );
-		wp_cache_delete( $this->code, 'WPInv_Discount_Codes' );
-    	do_action( 'wpinv_post_delete_discount', $this->ID, $this->data );
-
-		$this->ID = null;
-		$this->data['id'] = null;
-		return true;
-	}
-
-	/**
-	 * Increases a discount's usage.
-	 *
-	 * @since 1.0.15
-	 * @param int $by The number of usages to increas by.
-	 * @return int
-	 */
-	public function increase_usage( $by = 1 ) {
-
-		$this->uses = $this->uses + $by;
-
-		if( $this->uses  < 0 ) {
-			$this->uses = 0;
-			update_post_meta( $this->ID, "_wpi_discount_uses", 0 );
-		}
-
-		$this->save();
-
-		if( $by > 0 ) {
-			do_action( 'wpinv_discount_increase_use_count', $this->uses, $this->ID, $this->code, $by );
-		} else {
-			do_action( 'wpinv_discount_decrease_use_count', $this->uses, $this->ID, $this->code, absint( $by ) );
-		}
+            if ( $payment->has_status( array( 'wpi-cancelled', 'wpi-failed' ) ) ) {
+                continue;
+            }
+
+            $discounts = $payment->get_discounts( true );
+            if ( empty( $discounts ) ) {
+                continue;
+            }
+
+            $discounts = array_map( 'strtolower', wpinv_parse_list( $discounts ) );
+            if ( ! empty( $discounts ) && in_array( $code, $discounts ) ) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    /**
+     * Deletes the discount from the database
+     *
+     * @since 1.0.15
+     * @return boolean
+     */
+    public function remove() {
+
+        if ( empty( $this->ID ) ) {
+            return true;
+        }
+
+        do_action( 'wpinv_pre_delete_discount', $this->ID, $this->data );
+        wp_cache_delete( $this->ID, 'WPInv_Discounts' );
+        wp_delete_post( $this->ID, true );
+        wp_cache_delete( $this->code, 'WPInv_Discount_Codes' );
+        do_action( 'wpinv_post_delete_discount', $this->ID, $this->data );
+
+        $this->ID = null;
+        $this->data['id'] = null;
+        return true;
+    }
+
+    /**
+     * Increases a discount's usage.
+     *
+     * @since 1.0.15
+     * @param int $by The number of usages to increas by.
+     * @return int
+     */
+    public function increase_usage( $by = 1 ) {
+
+        $this->uses = $this->uses + $by;
+
+        if( $this->uses  < 0 ) {
+            $this->uses = 0;
+            update_post_meta( $this->ID, "_wpi_discount_uses", 0 );
+        }
+
+        $this->save();
+
+        if( $by > 0 ) {
+            do_action( 'wpinv_discount_increase_use_count', $this->uses, $this->ID, $this->code, $by );
+        } else {
+            do_action( 'wpinv_discount_decrease_use_count', $this->uses, $this->ID, $this->code, absint( $by ) );
+        }
 		
-		return $this->uses;
-	}
-
-	/**
-	 * Retrieves discount data
-	 *
-	 * @since 1.0.15
-	 * @return array
-	 */
-	public function get_data() {
-		$return = array();
-		foreach( array_keys( $this->data ) as $key ) {
-			$return[ $key ] = $this->get( $key );
-		}
-		return $return;
-	}
-
-	/**
-	 * Retrieves discount data as json
-	 *
-	 * @since 1.0.15
-	 * @return string|false
-	 */
-	public function get_data_as_json() {
-		return wp_json_encode( $this->get_data() );
-	}
-
-	/**
-	 * Checks if a discount can only be used once per user.
-	 *
-	 * @since 1.0.15
-	 * @return bool
-	 */
-	public function get_is_single_use() {
-		return (bool) apply_filters( 'wpinv_is_discount_single_use', $this->data['is_single_use'], $this->ID, $this, $this->code );
-	}
-
-	/**
-	 * Checks if a discount is recurring.
-	 *
-	 * @since 1.0.15
-	 * @return bool
-	 */
-	public function get_is_recurring() {
-		return (bool) apply_filters( 'wpinv_is_discount_recurring', $this->data['is_recurring'], $this->ID, $this->code, $this );
-	}
-
-	/**
-	 * Returns a discount's included items.
-	 *
-	 * @since 1.0.15
-	 * @return array
-	 */
-	public function get_items() {
-		return wpinv_parse_list( apply_filters( 'wpinv_get_discount_item_reqs', $this->data['items'], $this->ID, $this, $this->code ) );
-	}
-
-	/**
-	 * Returns a discount's discounted amount.
-	 *
-	 * @since 1.0.15
-	 * @return float
-	 */
-	public function get_discounted_amount( $amount ) {
-
-		if ( $this->type == 'flat' ) {
+        return $this->uses;
+    }
+
+    /**
+     * Retrieves discount data
+     *
+     * @since 1.0.15
+     * @return array
+     */
+    public function get_data() {
+        $return = array();
+        foreach( array_keys( $this->data ) as $key ) {
+            $return[ $key ] = $this->get( $key );
+        }
+        return $return;
+    }
+
+    /**
+     * Retrieves discount data as json
+     *
+     * @since 1.0.15
+     * @return string|false
+     */
+    public function get_data_as_json() {
+        return wp_json_encode( $this->get_data() );
+    }
+
+    /**
+     * Checks if a discount can only be used once per user.
+     *
+     * @since 1.0.15
+     * @return bool
+     */
+    public function get_is_single_use() {
+        return (bool) apply_filters( 'wpinv_is_discount_single_use', $this->data['is_single_use'], $this->ID, $this, $this->code );
+    }
+
+    /**
+     * Checks if a discount is recurring.
+     *
+     * @since 1.0.15
+     * @return bool
+     */
+    public function get_is_recurring() {
+        return (bool) apply_filters( 'wpinv_is_discount_recurring', $this->data['is_recurring'], $this->ID, $this->code, $this );
+    }
+
+    /**
+     * Returns a discount's included items.
+     *
+     * @since 1.0.15
+     * @return array
+     */
+    public function get_items() {
+        return wpinv_parse_list( apply_filters( 'wpinv_get_discount_item_reqs', $this->data['items'], $this->ID, $this, $this->code ) );
+    }
+
+    /**
+     * Returns a discount's discounted amount.
+     *
+     * @since 1.0.15
+     * @return float
+     */
+    public function get_discounted_amount( $amount ) {
+
+        if ( $this->type == 'flat' ) {
             $amount = $amount - $this->amount;
-		} else {
+        } else {
             $amount = $amount - ( $amount * ( $this->amount / 100 ) );
-		}
+        }
 
-		if ( $amount < 0 ) {
-			$amount = 0;
-		}
+        if ( $amount < 0 ) {
+            $amount = 0;
+        }
 
-		return apply_filters( 'wpinv_discounted_amount', $amount, $this->ID, $this, $this->code, $this->amount );
-	}
+        return apply_filters( 'wpinv_discounted_amount', $amount, $this->ID, $this, $this->code, $this->amount );
+    }
 	
 }

Spacing +189 added lines, -189 removed lines

@@ -5,7 +5,7 @@ 
  * @since   1.0.15
  */
 
-defined( 'ABSPATH' ) || exit;
+defined('ABSPATH') || exit;
 
 /**
  * Discount class.
@@ -63,45 +63,45 @@ 
 	 * @param int|array|string|WPInv_Discount $discount discount data, object, ID or code.
 	 * @since 1.0.15
 	 */
-	public function __construct( $discount = array() ) {
+	public function __construct($discount = array()) {
         
         // If the discount is an instance of this class...
-		if ( $discount instanceof WPInv_Discount ) {
-			$this->init( $discount->data );
+		if ($discount instanceof WPInv_Discount) {
+			$this->init($discount->data);
 			return;
         }
         
         // If the discount is an array of discount details...
-        if ( is_array( $discount ) ) {
-			$this->init( $discount );
+        if (is_array($discount)) {
+			$this->init($discount);
 			return;
 		}
 		
 		// Try fetching the discount by its post id.
 		$data = false;
 		
-		if ( ! empty( $discount ) && is_numeric( $discount ) ) {
-			$discount = absint( $discount );
-			$data = self::get_data_by( 'id', $discount );
+		if (!empty($discount) && is_numeric($discount)) {
+			$discount = absint($discount);
+			$data = self::get_data_by('id', $discount);
 		}
 
-		if ( is_array( $data ) ) {
-			$this->init( $data );
+		if (is_array($data)) {
+			$this->init($data);
 			return;
 		}
 		
 		// Try fetching the discount by its discount code.
-		if ( ! empty( $discount ) && is_scalar( $discount ) ) {
-			$data = self::get_data_by( 'discount_code', $discount );
+		if (!empty($discount) && is_scalar($discount)) {
+			$data = self::get_data_by('discount_code', $discount);
 		}
 
-		if ( is_array( $data ) ) {
-			$this->init( $data );
+		if (is_array($data)) {
+			$this->init($data);
 			return;
 		} 
 		
 		// If we are here then the discount does not exist.
-		$this->init( array() );
+		$this->init(array());
 	}
 	
 	/**
@@ -110,8 +110,8 @@ 
 	 * @since 1.0.15
 	 * @param array $data An array containing the discount's data
 	 */
-	public function init( $data ) {
-		$data       	  = self::sanitize_discount_data( $data );
+	public function init($data) {
+		$data       	  = self::sanitize_discount_data($data);
 		$this->data 	  = $data;
 		$this->old_status = $data['status'];
 		$this->ID   	  = $data['ID'];
@@ -127,50 +127,50 @@ 
 	 * @since 1.0.15
 	 * @return array|bool array of discount details on success. False otherwise.
 	 */
-	public static function get_data_by( $field, $value ) {
+	public static function get_data_by($field, $value) {
 
-		if ( 'id' == strtolower( $field ) ) {
+		if ('id' == strtolower($field)) {
 			// Make sure the value is numeric to avoid casting objects, for example,
 			// to int 1.
-			if ( ! is_numeric( $value ) )
+			if (!is_numeric($value))
 				return false;
-			$value = intval( $value );
-			if ( $value < 1 )
+			$value = intval($value);
+			if ($value < 1)
 				return false;
 		}
 
-		if ( ! $value || ! is_string( $field ) ) {
+		if (!$value || !is_string($field)) {
 			return false;
 		}
 		
-		$field = trim( $field );
+		$field = trim($field);
 
 		// prepare query args
-		switch ( strtolower( $field ) ) {
+		switch (strtolower($field)) {
 			case 'id':
 				$discount_id = $value;
-				$args		 = array( 'include' => array( $value ) );
+				$args = array('include' => array($value));
 				break;
 			case 'discount_code':
 			case 'code':
-				$value       = trim( $value );
-				$discount_id = wp_cache_get( $value, 'WPInv_Discount_Codes' );
-				$args		 = array( 'meta_key' => '_wpi_discount_code', 'meta_value' => $value );
+				$value       = trim($value);
+				$discount_id = wp_cache_get($value, 'WPInv_Discount_Codes');
+				$args = array('meta_key' => '_wpi_discount_code', 'meta_value' => $value);
 				break;
 			case 'name':
 				$discount_id = 0;
-				$args		 = array( 'name' => trim( $value ) );
+				$args		 = array('name' => trim($value));
 				break;
 			default:
-				$args		 = apply_filters( "wpinv_discount_get_data_by_{$field}_args", null, $value );
-				if ( ! is_array( $args ) ) {
-					return apply_filters( "wpinv_discount_get_data_by_$field", false, $value );
+				$args		 = apply_filters("wpinv_discount_get_data_by_{$field}_args", null, $value);
+				if (!is_array($args)) {
+					return apply_filters("wpinv_discount_get_data_by_$field", false, $value);
 				}
 
 		}
 
 		// Check if there is a cached value.
-		if ( ! empty( $discount_id ) && $discount = wp_cache_get( (int) $discount_id, 'WPInv_Discounts' ) ) {
+		if (!empty($discount_id) && $discount = wp_cache_get((int) $discount_id, 'WPInv_Discounts')) {
 			return $discount;
 		}
 
@@ -179,13 +179,13 @@ 
 			array(
 				'post_type'      => 'wpi_discount',
 				'posts_per_page' => 1,
-				'post_status'    => array( 'publish', 'pending', 'draft', 'expired' )
+				'post_status'    => array('publish', 'pending', 'draft', 'expired')
 			)
 		);
 
-		$discount = get_posts( $args );
+		$discount = get_posts($args);
 				
-		if( empty( $discount ) ) {
+		if (empty($discount)) {
 			return false;
 		}
 
@@ -194,31 +194,31 @@ 
 		// Prepare the return data.
 		$return = array(
             'ID'                          => $discount->ID,
-            'code'                        => get_post_meta( $discount->ID, '_wpi_discount_code', true ),
-            'amount'                      => get_post_meta( $discount->ID, '_wpi_discount_amount', true ),
+            'code'                        => get_post_meta($discount->ID, '_wpi_discount_code', true),
+            'amount'                      => get_post_meta($discount->ID, '_wpi_discount_amount', true),
             'date_created'                => $discount->post_date,
 			'date_modified'               => $discount->post_modified,
 			'status'               		  => $discount->post_status,
-			'start'                  	  => get_post_meta( $discount->ID, '_wpi_discount_start', true ),
-            'expiration'                  => get_post_meta( $discount->ID, '_wpi_discount_expiration', true ),
-            'type'               		  => get_post_meta( $discount->ID, '_wpi_discount_type', true ),
+			'start'                  	  => get_post_meta($discount->ID, '_wpi_discount_start', true),
+            'expiration'                  => get_post_meta($discount->ID, '_wpi_discount_expiration', true),
+            'type'               		  => get_post_meta($discount->ID, '_wpi_discount_type', true),
             'description'                 => $discount->post_excerpt,
-            'uses'                 		  => get_post_meta( $discount->ID, '_wpi_discount_uses', true ),
-            'is_single_use'               => get_post_meta( $discount->ID, '_wpi_discount_is_single_use', true ),
-            'items'              	      => get_post_meta( $discount->ID, '_wpi_discount_items', true ),
-            'excluded_items'              => get_post_meta( $discount->ID, '_wpi_discount_excluded_items', true ),
-            'max_uses'                    => get_post_meta( $discount->ID, '_wpi_discount_max_uses', true ),
-            'is_recurring'                => get_post_meta( $discount->ID, '_wpi_discount_is_recurring', true ),
-            'min_total'                   => get_post_meta( $discount->ID, '_wpi_discount_min_total', true ),
-            'max_total'                   => get_post_meta( $discount->ID, '_wpi_discount_max_total', true ),
+            'uses'                 		  => get_post_meta($discount->ID, '_wpi_discount_uses', true),
+            'is_single_use'               => get_post_meta($discount->ID, '_wpi_discount_is_single_use', true),
+            'items'              	      => get_post_meta($discount->ID, '_wpi_discount_items', true),
+            'excluded_items'              => get_post_meta($discount->ID, '_wpi_discount_excluded_items', true),
+            'max_uses'                    => get_post_meta($discount->ID, '_wpi_discount_max_uses', true),
+            'is_recurring'                => get_post_meta($discount->ID, '_wpi_discount_is_recurring', true),
+            'min_total'                   => get_post_meta($discount->ID, '_wpi_discount_min_total', true),
+            'max_total'                   => get_post_meta($discount->ID, '_wpi_discount_max_total', true),
         );
 		
-		$return = self::sanitize_discount_data( $return );
-		$return = apply_filters( 'wpinv_discount_properties', $return );
+		$return = self::sanitize_discount_data($return);
+		$return = apply_filters('wpinv_discount_properties', $return);
 
 		// Update the cache with our data
-		wp_cache_add( $discount->ID, $return, 'WPInv_Discounts' );
-		wp_cache_add( $return['code'], $discount->ID, 'WPInv_Discount_Codes' );
+		wp_cache_add($discount->ID, $return, 'WPInv_Discounts');
+		wp_cache_add($return['code'], $discount->ID, 'WPInv_Discount_Codes');
 
 		return $return;
 	}
@@ -232,9 +232,9 @@ 
 	 *
 	 * @return array the sanitized data
 	 */
-	public static function sanitize_discount_data( $data ) {
+	public static function sanitize_discount_data($data) {
 		
-		$allowed_discount_types = array_keys( wpinv_get_discount_types() );
+		$allowed_discount_types = array_keys(wpinv_get_discount_types());
 		
 		$return = array(
             'ID'                          => null,
@@ -259,60 +259,60 @@ 
 		
 				
 		// Arrays only please.
-		if ( ! is_array( $data ) ) {
+		if (!is_array($data)) {
             return $return;
         }
 
 		// If an id is provided, ensure it is a valid discount.
-        if ( ! empty( $data['ID'] ) && ( ! is_numeric( $data['ID'] ) || 'wpi_discount' !== get_post_type( $data['ID'] ) ) ) {
+        if (!empty($data['ID']) && (!is_numeric($data['ID']) || 'wpi_discount' !== get_post_type($data['ID']))) {
             return $return;
 		}
 
-        $return = array_merge( $return, $data );
+        $return = array_merge($return, $data);
 
         // Sanitize some keys.
-        $return['amount']         = wpinv_sanitize_amount( $return['amount'] );
+        $return['amount'] = wpinv_sanitize_amount($return['amount']);
 		$return['is_single_use']  = (bool) $return['is_single_use'];
 		$return['is_recurring']   = (bool) $return['is_recurring'];
 		$return['uses']	          = (int) $return['uses'];
 		$return['max_uses']	      = (int) $return['max_uses'];
-		$return['min_total'] 	  = wpinv_sanitize_amount( $return['min_total'] );
-        $return['max_total'] 	  = wpinv_sanitize_amount( $return['max_total'] );
+		$return['min_total'] = wpinv_sanitize_amount($return['min_total']);
+        $return['max_total'] = wpinv_sanitize_amount($return['max_total']);
 
 		// Trim all values.
-		$return = wpinv_clean( $return );
+		$return = wpinv_clean($return);
 		
 		// Ensure the discount type is supported.
-        if ( ! in_array( $return['type'], $allowed_discount_types, true ) ) {
+        if (!in_array($return['type'], $allowed_discount_types, true)) {
             $return['type'] = 'percent';
 		}
-		$return['type_name'] = wpinv_get_discount_type_name( $return['type'] );
+		$return['type_name'] = wpinv_get_discount_type_name($return['type']);
 		
 		// Do not offer more than a 100% discount.
-		if ( $return['type'] == 'percent' && (float) $return['amount'] > 100 ) {
+		if ($return['type'] == 'percent' && (float) $return['amount'] > 100) {
 			$return['amount'] = 100;
 		}
 
 		// Format dates.
-		foreach( wpinv_parse_list( 'date_created date_modified expiration start') as $prop ) {
-			if( ! empty( $return[$prop] ) ) {
-				$return[$prop]      = date_i18n( 'Y-m-d H:i:s', strtotime( $return[$prop] ) );
+		foreach (wpinv_parse_list('date_created date_modified expiration start') as $prop) {
+			if (!empty($return[$prop])) {
+				$return[$prop] = date_i18n('Y-m-d H:i:s', strtotime($return[$prop]));
 			}
 		}
 
 		// Formart items.
-		foreach( array( 'excluded_items', 'items' ) as $prop ) {
+		foreach (array('excluded_items', 'items') as $prop) {
 
-			if( ! empty( $return[$prop] ) ) {
+			if (!empty($return[$prop])) {
 				// Ensure that the property is an array of non-empty integers.
-				$return[$prop]      = array_filter( array_map( 'intval', wpinv_parse_list( $return[$prop] ) ) );
+				$return[$prop]      = array_filter(array_map('intval', wpinv_parse_list($return[$prop])));
 			} else {
 				$return[$prop]      = array();
 			}
 
 		}
 		
-		return apply_filters( 'wpinv_sanitize_discount_data', $return, $data );
+		return apply_filters('wpinv_sanitize_discount_data', $return, $data);
 	}
 	
 	/**
@@ -323,8 +323,8 @@ 
 	 *
 	 * @return bool Whether the given discount field is set.
 	 */
-	public function __isset( $key ){
-		return isset( $this->data[$key] ) || method_exists( $this, "get_$key");
+	public function __isset($key) {
+		return isset($this->data[$key]) || method_exists($this, "get_$key");
 	}
 	
 	/**
@@ -336,8 +336,8 @@ 
 	 * @param string $key Discount data to retrieve
 	 * @return mixed Value of the given discount property (if set).
 	 */
-	public function __get( $key ) {
-		return $this->get( $key );
+	public function __get($key) {
+		return $this->get($key);
 	}
 
 	/**
@@ -349,15 +349,15 @@ 
 	 * @param string $key Discount data to retrieve
 	 * @return mixed Value of the given discount property (if set).
 	 */
-	public function get( $key ) {
+	public function get($key) {
 		
-		if ( $key == 'id' ) {
+		if ($key == 'id') {
 			$key = 'ID';
 		}
 		
-		if( method_exists( $this, "get_$key") ) {
-			$value 	= call_user_func( array( $this, "get_$key" ) );
-		} else if( isset( $this->data[$key] ) ) {
+		if (method_exists($this, "get_$key")) {
+			$value 	= call_user_func(array($this, "get_$key"));
+		} else if (isset($this->data[$key])) {
 			$value 	= $this->data[$key];
 		} else {
 			$value = null;
@@ -374,7 +374,7 @@ 
 		 * @param string         $code     The discount's discount code.
 		 * @param array          $data     The discount's data array.
 		 */
-		return apply_filters( "wpinv_get_discount_{$key}", $value, $this->ID, $this, $this->data['code'], $this->data );
+		return apply_filters("wpinv_get_discount_{$key}", $value, $this->ID, $this, $this->data['code'], $this->data);
 
 	}
 	
@@ -387,9 +387,9 @@ 
 	 * @access public
 	 *
 	 */
-	public function __set( $key, $value ) {
+	public function __set($key, $value) {
 		
-		if ( 'id' == strtolower( $key ) ) {
+		if ('id' == strtolower($key)) {
 			
 			$this->ID = $value;
 			$this->data['ID'] = $value;
@@ -410,10 +410,10 @@ 
 		 * @param string         $code     The discount's discount code.
 		 * @param array          $data     The discount's data array.
 		 */
-		$value = apply_filters( "wpinv_set_discount_{$key}", $value, $this->ID, $this, $this->code, $this->data );
+		$value = apply_filters("wpinv_set_discount_{$key}", $value, $this->ID, $this, $this->code, $this->data);
 
-		if( method_exists( $this, "set_$key") ) {
-			call_user_func( array( $this, "set_$key" ), $value );
+		if (method_exists($this, "set_$key")) {
+			call_user_func(array($this, "set_$key"), $value);
 		} else {
 			$this->data[$key] = $value;
 		}
@@ -428,53 +428,53 @@ 
 	 * @return bool
 	 *
 	 */
-	public function save(){
+	public function save() {
 		
-		$data = self::sanitize_discount_data( $this->data );
+		$data = self::sanitize_discount_data($this->data);
 
 		// Should we create a new post?
-		if( ! $data[ 'ID' ] ) {
+		if (!$data['ID']) {
 
-			$id = wp_insert_post( array(
+			$id = wp_insert_post(array(
 				'post_status'           => $data['status'],
 				'post_type'             => 'wpi_discount',
 				'post_excerpt'          => $data['description'],
-			) );
+			));
 
-			if( empty( $id ) ) {
+			if (empty($id)) {
 				return false;
 			}
 
-			$data[ 'ID' ] = (int) $id;
-			$this->ID = $data[ 'ID' ];
-			$this->data['ID'] = $data[ 'ID' ];
+			$data['ID'] = (int) $id;
+			$this->ID = $data['ID'];
+			$this->data['ID'] = $data['ID'];
 
 		} else {
-			$this->update_status( $data['status'] );
+			$this->update_status($data['status']);
 		}
 
-		$meta = apply_filters( 'wpinv_update_discount', $data, $this->ID, $this );
+		$meta = apply_filters('wpinv_update_discount', $data, $this->ID, $this);
 
-		do_action( 'wpinv_pre_update_discount', $meta, $this->ID, $this );
+		do_action('wpinv_pre_update_discount', $meta, $this->ID, $this);
 
-		foreach( wpinv_parse_list( 'ID date_created date_modified status description type_name' ) as $prop ) {
-			if ( isset( $meta[$prop] ) ) {
-				unset( $meta[$prop] );
+		foreach (wpinv_parse_list('ID date_created date_modified status description type_name') as $prop) {
+			if (isset($meta[$prop])) {
+				unset($meta[$prop]);
 			}
 		}
 
-		if( isset( $meta['uses'] ) && empty( $meta['uses'] ) ) {
-			unset( $meta['uses'] );
+		if (isset($meta['uses']) && empty($meta['uses'])) {
+			unset($meta['uses']);
 		}
 
 		// Save the metadata.
-		foreach( $meta as $key => $value ) {
-			update_post_meta( $this->ID, "_wpi_discount_$key", $value );
+		foreach ($meta as $key => $value) {
+			update_post_meta($this->ID, "_wpi_discount_$key", $value);
 		}
 
 		$this->refresh();
 
-		do_action( 'wpinv_post_update_discount', $meta, $this->ID );
+		do_action('wpinv_post_update_discount', $meta, $this->ID);
 
 		return true;		
 	}
@@ -487,17 +487,17 @@ 
 	 * @return bool
 	 *
 	 */
-	public function refresh(){
+	public function refresh() {
 
 		// Empty the cache for this discount.
-		wp_cache_delete( $this->ID, 'WPInv_Discounts' );
-		wp_cache_delete( $this->get( 'code' ), 'WPInv_Discount_Codes' );
+		wp_cache_delete($this->ID, 'WPInv_Discounts');
+		wp_cache_delete($this->get('code'), 'WPInv_Discount_Codes');
 
-		$data = self::get_data_by( 'id', $this->ID );
-		if( is_array( $data ) ) {
-			$this->init( $data );
+		$data = self::get_data_by('id', $this->ID);
+		if (is_array($data)) {
+			$this->init($data);
 		} else {
-			$this->init( array() );
+			$this->init(array());
 		}
 
 	}
@@ -510,14 +510,14 @@ 
 	 * @return bool
 	 *
 	 */
-	public function update_status( $status = 'publish' ){
+	public function update_status($status = 'publish') {
 
 
-		if ( $this->exists() && $this->old_status != $status ) {
+		if ($this->exists() && $this->old_status != $status) {
 
-			do_action( 'wpinv_pre_update_discount_status', $this->ID, $this->old_status, $status );
-        	$updated = wp_update_post( array( 'ID' => $this->ID, 'post_status' => $status ) );
-			do_action( 'wpinv_post_update_discount_status', $this->ID, $this->old_status, $status );
+			do_action('wpinv_pre_update_discount_status', $this->ID, $this->old_status, $status);
+        	$updated = wp_update_post(array('ID' => $this->ID, 'post_status' => $status));
+			do_action('wpinv_post_update_discount_status', $this->ID, $this->old_status, $status);
 
 			$this->refresh();
 
@@ -534,8 +534,8 @@ 
 	 * 
 	 * @since 1.0.15
 	 */
-	public function exists(){
-		return ! empty( $this->ID );
+	public function exists() {
+		return !empty($this->ID);
 	}
 	
 	// Boolean methods
@@ -548,7 +548,7 @@ 
 	 * @since 1.0.15
 	 * @return bool
 	 */
-	public function is_type( $type ) {
+	public function is_type($type) {
 		return $this->type == $type;
 	}
 	
@@ -569,12 +569,12 @@ 
 	 * @return bool
 	 */
 	public function has_exceeded_limit() {
-		if( empty( $this->max_uses ) || empty( $this->uses ) ) { 
-			return false ;
+		if (empty($this->max_uses) || empty($this->uses)) { 
+			return false;
 		}
 		
-		$exceeded =  $this->uses >= $this->max_uses;
-		return apply_filters( 'wpinv_is_discount_maxed_out', $exceeded, $this->ID, $this, $this->code );
+		$exceeded = $this->uses >= $this->max_uses;
+		return apply_filters('wpinv_is_discount_maxed_out', $exceeded, $this->ID, $this, $this->code);
 	}
 	
 	/**
@@ -584,8 +584,8 @@ 
 	 * @return bool
 	 */
 	public function is_expired() {
-		$expired = empty ( $this->expiration ) ? false : current_time( 'timestamp' ) > strtotime( $this->expiration );
-		return apply_filters( 'wpinv_is_discount_expired', $expired, $this->ID, $this, $this->code );
+		$expired = empty ($this->expiration) ? false : current_time('timestamp') > strtotime($this->expiration);
+		return apply_filters('wpinv_is_discount_expired', $expired, $this->ID, $this, $this->code);
 	}
 
 	/**
@@ -595,8 +595,8 @@ 
 	 * @return bool
 	 */
 	public function has_started() {
-		$started = empty ( $this->start ) ? true : current_time( 'timestamp' ) > strtotime( $this->start );
-		return apply_filters( 'wpinv_is_discount_started', $started, $this->ID, $this, $this->code );		
+		$started = empty ($this->start) ? true : current_time('timestamp') > strtotime($this->start);
+		return apply_filters('wpinv_is_discount_started', $started, $this->ID, $this, $this->code);		
 	}
 	
 	/**
@@ -606,17 +606,17 @@ 
 	 * @since 1.0.15
 	 * @return boolean
 	 */
-	public function is_valid_for_items( $item_ids ) {
+	public function is_valid_for_items($item_ids) {
 		 
-		$item_ids = array_map( 'intval',  wpinv_parse_list( $item_ids ) );
-		$included = array_intersect( $item_ids, $this->items );
-		$excluded = array_intersect( $item_ids, $this->excluded_items );
+		$item_ids = array_map('intval', wpinv_parse_list($item_ids));
+		$included = array_intersect($item_ids, $this->items);
+		$excluded = array_intersect($item_ids, $this->excluded_items);
 
-		if( ! empty( $this->excluded_items ) && ! empty( $excluded ) ) {
+		if (!empty($this->excluded_items) && !empty($excluded)) {
 			return false;
 		}
 
-		if( ! empty( $this->items ) && empty( $included ) ) {
+		if (!empty($this->items) && empty($included)) {
 			return false;
 		}
 		return true;
@@ -629,8 +629,8 @@ 
 	 * @since 1.0.15
 	 * @return boolean
 	 */
-	public function is_valid_for_amount( $amount ) {
-		return $this->is_minimum_amount_met( $amount ) && $this->is_maximum_amount_met( $amount );
+	public function is_valid_for_amount($amount) {
+		return $this->is_minimum_amount_met($amount) && $this->is_maximum_amount_met($amount);
 	}
 
 	/**
@@ -640,10 +640,10 @@ 
 	 * @since 1.0.15
 	 * @return boolean
 	 */
-	public function is_minimum_amount_met( $amount ) {
-		$amount = floatval( $amount );
-		$min_met= ! ( $this->min_total > 0 && $amount < $this->min_total );
-		return apply_filters( 'wpinv_is_discount_min_met', $min_met, $this->ID, $this, $this->code, $amount );
+	public function is_minimum_amount_met($amount) {
+		$amount = floatval($amount);
+		$min_met = !($this->min_total > 0 && $amount < $this->min_total);
+		return apply_filters('wpinv_is_discount_min_met', $min_met, $this->ID, $this, $this->code, $amount);
 	}
 
 	/**
@@ -653,10 +653,10 @@ 
 	 * @since 1.0.15
 	 * @return boolean
 	 */
-	public function is_maximum_amount_met( $amount ) {
-		$amount = floatval( $amount );
-		$max_met= ! ( $this->max_total > 0 && $amount > $this->max_total );
-		return apply_filters( 'wpinv_is_discount_max_met', $max_met, $this->ID, $this, $this->code, $amount );
+	public function is_maximum_amount_met($amount) {
+		$amount = floatval($amount);
+		$max_met = !($this->max_total > 0 && $amount > $this->max_total);
+		return apply_filters('wpinv_is_discount_max_met', $max_met, $this->ID, $this, $this->code, $amount);
 	}
 
 	/**
@@ -666,50 +666,50 @@ 
 	 * @since 1.0.15
 	 * @return boolean
 	 */
-	public function is_valid_for_user( $user ) {
+	public function is_valid_for_user($user) {
 		global $wpi_checkout_id;
 
-		if( empty( $user ) || empty( $this->is_single_use ) ) {
+		if (empty($user) || empty($this->is_single_use)) {
 			return true;
 		}
 
 		$user_id = 0;
-        if ( is_int( $user ) ) {
-            $user_id = absint( $user );
-        } else if ( is_email( $user ) && $user_data = get_user_by( 'email', $user ) ) {
+        if (is_int($user)) {
+            $user_id = absint($user);
+        } else if (is_email($user) && $user_data = get_user_by('email', $user)) {
             $user_id = $user_data->ID;
-        } else if ( $user_data = get_user_by( 'login', $user ) ) {
+        } else if ($user_data = get_user_by('login', $user)) {
             $user_id = $user_data->ID;
-        } else if ( absint( $user ) > 0 ) {
-            $user_id = absint( $user );
+        } else if (absint($user) > 0) {
+            $user_id = absint($user);
 		}
 
-		if ( empty( $user_id ) ) {
+		if (empty($user_id)) {
 			return true;
 		}
 		
 		// Get all payments with matching user id
-        $payments = wpinv_get_invoices( array( 'user' => $user_id, 'limit' => false ) ); 
-		$code     = strtolower( $this->code );
+        $payments = wpinv_get_invoices(array('user' => $user_id, 'limit' => false)); 
+		$code = strtolower($this->code);
 
-		foreach ( $payments as $payment ) {
+		foreach ($payments as $payment) {
 
 			// Don't count discount used for current invoice checkout.
-			if ( ! empty( $wpi_checkout_id ) && $wpi_checkout_id == $payment->ID ) {
+			if (!empty($wpi_checkout_id) && $wpi_checkout_id == $payment->ID) {
 				continue;
 			}
 			
-			if ( $payment->has_status( array( 'wpi-cancelled', 'wpi-failed' ) ) ) {
+			if ($payment->has_status(array('wpi-cancelled', 'wpi-failed'))) {
 				continue;
 			}
 
-			$discounts = $payment->get_discounts( true );
-			if ( empty( $discounts ) ) {
+			$discounts = $payment->get_discounts(true);
+			if (empty($discounts)) {
 				continue;
 			}
 
-			$discounts = array_map( 'strtolower', wpinv_parse_list( $discounts ) );
-			if ( ! empty( $discounts ) && in_array( $code, $discounts ) ) {
+			$discounts = array_map('strtolower', wpinv_parse_list($discounts));
+			if (!empty($discounts) && in_array($code, $discounts)) {
 				return false;
 			}
 		}
@@ -725,15 +725,15 @@ 
 	 */
 	public function remove() {
 
-		if ( empty( $this->ID ) ) {
+		if (empty($this->ID)) {
 			return true;
 		}
 
-		do_action( 'wpinv_pre_delete_discount', $this->ID, $this->data );
-		wp_cache_delete( $this->ID, 'WPInv_Discounts' );
-    	wp_delete_post( $this->ID, true );
-		wp_cache_delete( $this->code, 'WPInv_Discount_Codes' );
-    	do_action( 'wpinv_post_delete_discount', $this->ID, $this->data );
+		do_action('wpinv_pre_delete_discount', $this->ID, $this->data);
+		wp_cache_delete($this->ID, 'WPInv_Discounts');
+    	wp_delete_post($this->ID, true);
+		wp_cache_delete($this->code, 'WPInv_Discount_Codes');
+    	do_action('wpinv_post_delete_discount', $this->ID, $this->data);
 
 		$this->ID = null;
 		$this->data['id'] = null;
@@ -747,21 +747,21 @@ 
 	 * @param int $by The number of usages to increas by.
 	 * @return int
 	 */
-	public function increase_usage( $by = 1 ) {
+	public function increase_usage($by = 1) {
 
 		$this->uses = $this->uses + $by;
 
-		if( $this->uses  < 0 ) {
+		if ($this->uses < 0) {
 			$this->uses = 0;
-			update_post_meta( $this->ID, "_wpi_discount_uses", 0 );
+			update_post_meta($this->ID, "_wpi_discount_uses", 0);
 		}
 
 		$this->save();
 
-		if( $by > 0 ) {
-			do_action( 'wpinv_discount_increase_use_count', $this->uses, $this->ID, $this->code, $by );
+		if ($by > 0) {
+			do_action('wpinv_discount_increase_use_count', $this->uses, $this->ID, $this->code, $by);
 		} else {
-			do_action( 'wpinv_discount_decrease_use_count', $this->uses, $this->ID, $this->code, absint( $by ) );
+			do_action('wpinv_discount_decrease_use_count', $this->uses, $this->ID, $this->code, absint($by));
 		}
 		
 		return $this->uses;
@@ -775,8 +775,8 @@ 
 	 */
 	public function get_data() {
 		$return = array();
-		foreach( array_keys( $this->data ) as $key ) {
-			$return[ $key ] = $this->get( $key );
+		foreach (array_keys($this->data) as $key) {
+			$return[$key] = $this->get($key);
 		}
 		return $return;
 	}
@@ -788,7 +788,7 @@ 
 	 * @return string|false
 	 */
 	public function get_data_as_json() {
-		return wp_json_encode( $this->get_data() );
+		return wp_json_encode($this->get_data());
 	}
 
 	/**
@@ -798,7 +798,7 @@ 
 	 * @return bool
 	 */
 	public function get_is_single_use() {
-		return (bool) apply_filters( 'wpinv_is_discount_single_use', $this->data['is_single_use'], $this->ID, $this, $this->code );
+		return (bool) apply_filters('wpinv_is_discount_single_use', $this->data['is_single_use'], $this->ID, $this, $this->code);
 	}
 
 	/**
@@ -808,7 +808,7 @@ 
 	 * @return bool
 	 */
 	public function get_is_recurring() {
-		return (bool) apply_filters( 'wpinv_is_discount_recurring', $this->data['is_recurring'], $this->ID, $this->code, $this );
+		return (bool) apply_filters('wpinv_is_discount_recurring', $this->data['is_recurring'], $this->ID, $this->code, $this);
 	}
 
 	/**
@@ -818,7 +818,7 @@ 
 	 * @return array
 	 */
 	public function get_items() {
-		return wpinv_parse_list( apply_filters( 'wpinv_get_discount_item_reqs', $this->data['items'], $this->ID, $this, $this->code ) );
+		return wpinv_parse_list(apply_filters('wpinv_get_discount_item_reqs', $this->data['items'], $this->ID, $this, $this->code));
 	}
 
 	/**
@@ -827,19 +827,19 @@ 
 	 * @since 1.0.15
 	 * @return float
 	 */
-	public function get_discounted_amount( $amount ) {
+	public function get_discounted_amount($amount) {
 
-		if ( $this->type == 'flat' ) {
+		if ($this->type == 'flat') {
             $amount = $amount - $this->amount;
 		} else {
-            $amount = $amount - ( $amount * ( $this->amount / 100 ) );
+            $amount = $amount - ($amount * ($this->amount / 100));
 		}
 
-		if ( $amount < 0 ) {
+		if ($amount < 0) {
 			$amount = 0;
 		}
 
-		return apply_filters( 'wpinv_discounted_amount', $amount, $this->ID, $this, $this->code, $this->amount );
+		return apply_filters('wpinv_discounted_amount', $amount, $this->ID, $this, $this->code, $this->amount);
 	}
 	
 }

includes/class-wpinv-invoice.php

Spacing +624 added lines, -624 removed lines

@@ -7,12 +7,12 @@ 
  */
  
 // MUST have WordPress.
-if ( !defined( 'WPINC' ) ) {
-    exit( 'Do NOT access this file directly: ' . basename( __FILE__ ) );
+if (!defined('WPINC')) {
+    exit('Do NOT access this file directly: ' . basename(__FILE__));
 }
 
 final class WPInv_Invoice {
-    public $ID  = 0;
+    public $ID = 0;
     public $title;
     public $post_type;
     
@@ -65,17 +65,17 @@ 
     public $full_name = '';
     public $parent_invoice = 0;
     
-    public function __construct( $invoice_id = false ) {
-        if( empty( $invoice_id ) ) {
+    public function __construct($invoice_id = false) {
+        if (empty($invoice_id)) {
             return false;
         }
 
-        $this->setup_invoice( $invoice_id );
+        $this->setup_invoice($invoice_id);
     }
 
-    public function get( $key ) {
-        if ( method_exists( $this, 'get_' . $key ) ) {
-            $value = call_user_func( array( $this, 'get_' . $key ) );
+    public function get($key) {
+        if (method_exists($this, 'get_' . $key)) {
+            $value = call_user_func(array($this, 'get_' . $key));
         } else {
             $value = $this->$key;
         }
@@ -83,51 +83,51 @@ 
         return $value;
     }
 
-    public function set( $key, $value ) {
-        $ignore = array( 'items', 'cart_details', 'fees', '_ID' );
+    public function set($key, $value) {
+        $ignore = array('items', 'cart_details', 'fees', '_ID');
 
-        if ( $key === 'status' ) {
+        if ($key === 'status') {
             $this->old_status = $this->status;
         }
 
-        if ( ! in_array( $key, $ignore ) ) {
-            $this->pending[ $key ] = $value;
+        if (!in_array($key, $ignore)) {
+            $this->pending[$key] = $value;
         }
 
-        if( '_ID' !== $key ) {
+        if ('_ID' !== $key) {
             $this->$key = $value;
         }
     }
 
-    public function _isset( $name ) {
-        if ( property_exists( $this, $name) ) {
-            return false === empty( $this->$name );
+    public function _isset($name) {
+        if (property_exists($this, $name)) {
+            return false === empty($this->$name);
         } else {
             return null;
         }
     }
 
-    private function setup_invoice( $invoice_id ) {
+    private function setup_invoice($invoice_id) {
         $this->pending = array();
 
-        if ( empty( $invoice_id ) ) {
+        if (empty($invoice_id)) {
             return false;
         }
 
-        $invoice = get_post( $invoice_id );
+        $invoice = get_post($invoice_id);
 
-        if( !$invoice || is_wp_error( $invoice ) ) {
+        if (!$invoice || is_wp_error($invoice)) {
             return false;
         }
 
-        if( !('wpi_invoice' == $invoice->post_type OR 'wpi_quote' == $invoice->post_type) ) {
+        if (!('wpi_invoice' == $invoice->post_type OR 'wpi_quote' == $invoice->post_type)) {
             return false;
         }
 
-        do_action( 'wpinv_pre_setup_invoice', $this, $invoice_id );
+        do_action('wpinv_pre_setup_invoice', $this, $invoice_id);
         
         // Primary Identifier
-        $this->ID              = absint( $invoice_id );
+        $this->ID              = absint($invoice_id);
         $this->post_type       = $invoice->post_type;
         
         // We have a payment, get the generic payment_meta item to reduce calls to it
@@ -139,7 +139,7 @@ 
         $this->post_status     = $this->status;
         $this->mode            = $this->setup_mode();
         $this->parent_invoice  = $invoice->post_parent;
-        $this->post_name       = $this->setup_post_name( $invoice );
+        $this->post_name       = $this->setup_post_name($invoice);
         $this->status_nicename = $this->setup_status_nicename($invoice->post_status);
 
         // Items
@@ -161,8 +161,8 @@ 
         
         // User based
         $this->ip              = $this->setup_ip();
-        $this->user_id         = !empty( $invoice->post_author ) ? $invoice->post_author : get_current_user_id();///$this->setup_user_id();
-        $this->email           = get_the_author_meta( 'email', $this->user_id );
+        $this->user_id         = !empty($invoice->post_author) ? $invoice->post_author : get_current_user_id(); ///$this->setup_user_id();
+        $this->email           = get_the_author_meta('email', $this->user_id);
         
         $this->user_info       = $this->setup_user_info();
                 
@@ -171,7 +171,7 @@ 
         $this->company         = $this->user_info['company'];
         $this->vat_number      = $this->user_info['vat_number'];
         $this->vat_rate        = $this->user_info['vat_rate'];
-        $this->adddress_confirmed  = $this->user_info['adddress_confirmed'];
+        $this->adddress_confirmed = $this->user_info['adddress_confirmed'];
         $this->address         = $this->user_info['address'];
         $this->city            = $this->user_info['city'];
         $this->country         = $this->user_info['country'];
@@ -186,39 +186,39 @@ 
         // Other Identifiers
         $this->key             = $this->setup_invoice_key();
         $this->number          = $this->setup_invoice_number();
-        $this->title           = !empty( $invoice->post_title ) ? $invoice->post_title : $this->number;
+        $this->title           = !empty($invoice->post_title) ? $invoice->post_title : $this->number;
         
-        $this->full_name       = trim( $this->first_name . ' '. $this->last_name );
+        $this->full_name       = trim($this->first_name . ' ' . $this->last_name);
         
         // Allow extensions to add items to this object via hook
-        do_action( 'wpinv_setup_invoice', $this, $invoice_id );
+        do_action('wpinv_setup_invoice', $this, $invoice_id);
 
         return true;
     }
     
-    private function setup_status_nicename( $status ) {
-        $all_invoice_statuses  = wpinv_get_invoice_statuses( true, true, $this );
+    private function setup_status_nicename($status) {
+        $all_invoice_statuses = wpinv_get_invoice_statuses(true, true, $this);
 
-        if ( $this->is_quote() && class_exists( 'Wpinv_Quotes_Shared' ) ) {
-            $all_invoice_statuses  = Wpinv_Quotes_Shared::wpinv_get_quote_statuses();
+        if ($this->is_quote() && class_exists('Wpinv_Quotes_Shared')) {
+            $all_invoice_statuses = Wpinv_Quotes_Shared::wpinv_get_quote_statuses();
         }
-        $status   = isset( $all_invoice_statuses[$status] ) ? $all_invoice_statuses[$status] : __( $status, 'invoicing' );
+        $status = isset($all_invoice_statuses[$status]) ? $all_invoice_statuses[$status] : __($status, 'invoicing');
 
-        return apply_filters( 'setup_status_nicename', $status );
+        return apply_filters('setup_status_nicename', $status);
     }
     
-    private function setup_post_name( $post = NULL ) {
+    private function setup_post_name($post = NULL) {
         global $wpdb;
         
         $post_name = '';
         
-        if ( !empty( $post ) ) {
-            if( !empty( $post->post_name ) ) {
+        if (!empty($post)) {
+            if (!empty($post->post_name)) {
                 $post_name = $post->post_name;
-            } else if ( !empty( $post->ID ) ) {
-                $post_name = wpinv_generate_post_name( $post->ID );
+            } else if (!empty($post->ID)) {
+                $post_name = wpinv_generate_post_name($post->ID);
 
-                $wpdb->update( $wpdb->posts, array( 'post_name' => $post_name ), array( 'ID' => $post->ID ) );
+                $wpdb->update($wpdb->posts, array('post_name' => $post_name), array('ID' => $post->ID));
             }
         }
 
@@ -226,12 +226,12 @@ 
     }
     
     private function setup_due_date() {
-        $due_date = $this->get_meta( '_wpinv_due_date' );
+        $due_date = $this->get_meta('_wpinv_due_date');
         
-        if ( empty( $due_date ) ) {
-            $overdue_time = strtotime( $this->date ) + ( DAY_IN_SECONDS * absint( wpinv_get_option( 'overdue_days' ) ) );
-            $due_date = date_i18n( 'Y-m-d', $overdue_time );
-        } else if ( $due_date == 'none' ) {
+        if (empty($due_date)) {
+            $overdue_time = strtotime($this->date) + (DAY_IN_SECONDS * absint(wpinv_get_option('overdue_days')));
+            $due_date = date_i18n('Y-m-d', $overdue_time);
+        } else if ($due_date == 'none') {
             $due_date = '';
         }
         
@@ -239,66 +239,66 @@ 
     }
     
     private function setup_completed_date() {
-        $invoice = get_post( $this->ID );
+        $invoice = get_post($this->ID);
 
-        if ( 'wpi-pending' == $invoice->post_status || 'preapproved' == $invoice->post_status ) {
+        if ('wpi-pending' == $invoice->post_status || 'preapproved' == $invoice->post_status) {
             return false; // This invoice was never paid
         }
 
-        $date = ( $date = $this->get_meta( '_wpinv_completed_date', true ) ) ? $date : $invoice->modified_date;
+        $date = ($date = $this->get_meta('_wpinv_completed_date', true)) ? $date : $invoice->modified_date;
 
         return $date;
     }
     
     private function setup_cart_details() {
-        $cart_details = isset( $this->payment_meta['cart_details'] ) ? maybe_unserialize( $this->payment_meta['cart_details'] ) : array();
+        $cart_details = isset($this->payment_meta['cart_details']) ? maybe_unserialize($this->payment_meta['cart_details']) : array();
         return $cart_details;
     }
     
     public function array_convert() {
-        return get_object_vars( $this );
+        return get_object_vars($this);
     }
     
     private function setup_items() {
-        $items = isset( $this->payment_meta['items'] ) ? maybe_unserialize( $this->payment_meta['items'] ) : array();
+        $items = isset($this->payment_meta['items']) ? maybe_unserialize($this->payment_meta['items']) : array();
         return $items;
     }
     
     private function setup_fees() {
-        $payment_fees = isset( $this->payment_meta['fees'] ) ? $this->payment_meta['fees'] : array();
+        $payment_fees = isset($this->payment_meta['fees']) ? $this->payment_meta['fees'] : array();
         return $payment_fees;
     }
         
     private function setup_currency() {
-        $currency = isset( $this->payment_meta['currency'] ) ? $this->payment_meta['currency'] : apply_filters( 'wpinv_currency_default', wpinv_get_currency(), $this );
+        $currency = isset($this->payment_meta['currency']) ? $this->payment_meta['currency'] : apply_filters('wpinv_currency_default', wpinv_get_currency(), $this);
         return $currency;
     }
     
     private function setup_discount() {
         //$discount = $this->get_meta( '_wpinv_discount', true );
-        $discount = (float)$this->subtotal - ( (float)$this->total - (float)$this->tax - (float)$this->fees_total );
-        if ( $discount < 0 ) {
+        $discount = (float) $this->subtotal - ((float) $this->total - (float) $this->tax - (float) $this->fees_total);
+        if ($discount < 0) {
             $discount = 0;
         }
-        $discount = wpinv_round_amount( $discount );
+        $discount = wpinv_round_amount($discount);
         
         return $discount;
     }
     
     private function setup_discount_code() {
-        $discount_code = !empty( $this->discounts ) ? $this->discounts : $this->get_meta( '_wpinv_discount_code', true );
+        $discount_code = !empty($this->discounts) ? $this->discounts : $this->get_meta('_wpinv_discount_code', true);
         return $discount_code;
     }
     
     private function setup_tax() {
-        $tax = $this->get_meta( '_wpinv_tax', true );
+        $tax = $this->get_meta('_wpinv_tax', true);
 
         // We don't have tax as it's own meta and no meta was passed
-        if ( '' === $tax ) {            
-            $tax = isset( $this->payment_meta['tax'] ) ? $this->payment_meta['tax'] : 0;
+        if ('' === $tax) {            
+            $tax = isset($this->payment_meta['tax']) ? $this->payment_meta['tax'] : 0;
         }
         
-        if ( $tax < 0 ) {
+        if ($tax < 0) {
             $tax = 0;
         }
 
@@ -309,9 +309,9 @@ 
         $subtotal     = 0;
         $cart_details = $this->cart_details;
 
-        if ( is_array( $cart_details ) ) {
-            foreach ( $cart_details as $item ) {
-                if ( isset( $item['subtotal'] ) ) {
+        if (is_array($cart_details)) {
+            foreach ($cart_details as $item) {
+                if (isset($item['subtotal'])) {
                     $subtotal += $item['subtotal'];
                 }
             }
@@ -325,23 +325,23 @@ 
     }
     
     private function setup_discounts() {
-        $discounts = ! empty( $this->payment_meta['user_info']['discount'] ) ? $this->payment_meta['user_info']['discount'] : array();
+        $discounts = !empty($this->payment_meta['user_info']['discount']) ? $this->payment_meta['user_info']['discount'] : array();
         return $discounts;
     }
     
     private function setup_total() {
-        $amount = $this->get_meta( '_wpinv_total', true );
+        $amount = $this->get_meta('_wpinv_total', true);
 
-        if ( empty( $amount ) && '0.00' != $amount ) {
-            $meta   = $this->get_meta( '_wpinv_payment_meta', true );
-            $meta   = maybe_unserialize( $meta );
+        if (empty($amount) && '0.00' != $amount) {
+            $meta   = $this->get_meta('_wpinv_payment_meta', true);
+            $meta   = maybe_unserialize($meta);
 
-            if ( isset( $meta['amount'] ) ) {
+            if (isset($meta['amount'])) {
                 $amount = $meta['amount'];
             }
         }
 
-        if($amount < 0){
+        if ($amount < 0) {
             $amount = 0;
         }
 
@@ -349,13 +349,13 @@ 
     }
     
     private function setup_mode() {
-        return $this->get_meta( '_wpinv_mode' );
+        return $this->get_meta('_wpinv_mode');
     }
 
     private function setup_gateway() {
-        $gateway = $this->get_meta( '_wpinv_gateway' );
+        $gateway = $this->get_meta('_wpinv_gateway');
         
-        if ( empty( $gateway ) && 'publish' === $this->status ) {
+        if (empty($gateway) && 'publish' === $this->status) {
             $gateway = 'manual';
         }
         
@@ -363,23 +363,23 @@ 
     }
     
     private function setup_gateway_title() {
-        $gateway_title = wpinv_get_gateway_checkout_label( $this->gateway );
+        $gateway_title = wpinv_get_gateway_checkout_label($this->gateway);
         return $gateway_title;
     }
 
     private function setup_transaction_id() {
-        $transaction_id = $this->get_meta( '_wpinv_transaction_id' );
+        $transaction_id = $this->get_meta('_wpinv_transaction_id');
 
-        if ( empty( $transaction_id ) || (int) $transaction_id === (int) $this->ID ) {
+        if (empty($transaction_id) || (int) $transaction_id === (int) $this->ID) {
             $gateway        = $this->gateway;
-            $transaction_id = apply_filters( 'wpinv_get_invoice_transaction_id-' . $gateway, $this->ID );
+            $transaction_id = apply_filters('wpinv_get_invoice_transaction_id-' . $gateway, $this->ID);
         }
 
         return $transaction_id;
     }
 
     private function setup_ip() {
-        $ip = $this->get_meta( '_wpinv_user_ip' );
+        $ip = $this->get_meta('_wpinv_user_ip');
         return $ip;
     }
 
@@ -389,62 +389,62 @@ 
     ///}
         
     private function setup_first_name() {
-        $first_name = $this->get_meta( '_wpinv_first_name' );
+        $first_name = $this->get_meta('_wpinv_first_name');
         return $first_name;
     }
     
     private function setup_last_name() {
-        $last_name = $this->get_meta( '_wpinv_last_name' );
+        $last_name = $this->get_meta('_wpinv_last_name');
         return $last_name;
     }
     
     private function setup_company() {
-        $company = $this->get_meta( '_wpinv_company' );
+        $company = $this->get_meta('_wpinv_company');
         return $company;
     }
     
     private function setup_vat_number() {
-        $vat_number = $this->get_meta( '_wpinv_vat_number' );
+        $vat_number = $this->get_meta('_wpinv_vat_number');
         return $vat_number;
     }
     
     private function setup_vat_rate() {
-        $vat_rate = $this->get_meta( '_wpinv_vat_rate' );
+        $vat_rate = $this->get_meta('_wpinv_vat_rate');
         return $vat_rate;
     }
     
     private function setup_adddress_confirmed() {
-        $adddress_confirmed = $this->get_meta( '_wpinv_adddress_confirmed' );
+        $adddress_confirmed = $this->get_meta('_wpinv_adddress_confirmed');
         return $adddress_confirmed;
     }
     
     private function setup_phone() {
-        $phone = $this->get_meta( '_wpinv_phone' );
+        $phone = $this->get_meta('_wpinv_phone');
         return $phone;
     }
     
     private function setup_address() {
-        $address = $this->get_meta( '_wpinv_address', true );
+        $address = $this->get_meta('_wpinv_address', true);
         return $address;
     }
     
     private function setup_city() {
-        $city = $this->get_meta( '_wpinv_city', true );
+        $city = $this->get_meta('_wpinv_city', true);
         return $city;
     }
     
     private function setup_country() {
-        $country = $this->get_meta( '_wpinv_country', true );
+        $country = $this->get_meta('_wpinv_country', true);
         return $country;
     }
     
     private function setup_state() {
-        $state = $this->get_meta( '_wpinv_state', true );
+        $state = $this->get_meta('_wpinv_state', true);
         return $state;
     }
     
     private function setup_zip() {
-        $zip = $this->get_meta( '_wpinv_zip', true );
+        $zip = $this->get_meta('_wpinv_zip', true);
         return $zip;
     }
 
@@ -453,7 +453,7 @@ 
             'user_id'        => $this->user_id,
             'first_name'     => $this->first_name,
             'last_name'      => $this->last_name,
-            'email'          => get_the_author_meta( 'email', $this->user_id ),
+            'email'          => get_the_author_meta('email', $this->user_id),
             'phone'          => $this->phone,
             'address'        => $this->address,
             'city'           => $this->city,
@@ -468,12 +468,12 @@ 
         );
         
         $user_info = array();
-        if ( isset( $this->payment_meta['user_info'] ) ) {
-            $user_info = maybe_unserialize( $this->payment_meta['user_info'] );
+        if (isset($this->payment_meta['user_info'])) {
+            $user_info = maybe_unserialize($this->payment_meta['user_info']);
             
-            if ( !empty( $user_info ) && isset( $user_info['user_id'] ) && $post = get_post( $this->ID ) ) {
+            if (!empty($user_info) && isset($user_info['user_id']) && $post = get_post($this->ID)) {
                 $this->user_id = $post->post_author;
-                $this->email = get_the_author_meta( 'email', $this->user_id );
+                $this->email = get_the_author_meta('email', $this->user_id);
                 
                 $user_info['user_id'] = $this->user_id;
                 $user_info['email'] = $this->email;
@@ -482,13 +482,13 @@ 
             }
         }
         
-        $user_info    = wp_parse_args( $user_info, $defaults );
+        $user_info = wp_parse_args($user_info, $defaults);
         
         // Get the user, but only if it's been created
-        $user = get_userdata( $this->user_id );
+        $user = get_userdata($this->user_id);
         
-        if ( !empty( $user ) && $user->ID > 0 ) {
-            if ( empty( $user_info ) ) {
+        if (!empty($user) && $user->ID > 0) {
+            if (empty($user_info)) {
                 $user_info = array(
                     'user_id'    => $user->ID,
                     'first_name' => $user->first_name,
@@ -497,23 +497,23 @@ 
                     'discount'   => '',
                 );
             } else {
-                foreach ( $user_info as $key => $value ) {
-                    if ( ! empty( $value ) ) {
+                foreach ($user_info as $key => $value) {
+                    if (!empty($value)) {
                         continue;
                     }
 
-                    switch( $key ) {
+                    switch ($key) {
                         case 'user_id':
-                            $user_info[ $key ] = $user->ID;
+                            $user_info[$key] = $user->ID;
                             break;
                         case 'first_name':
-                            $user_info[ $key ] = $user->first_name;
+                            $user_info[$key] = $user->first_name;
                             break;
                         case 'last_name':
-                            $user_info[ $key ] = $user->last_name;
+                            $user_info[$key] = $user->last_name;
                             break;
                         case 'email':
-                            $user_info[ $key ] = $user->user_email;
+                            $user_info[$key] = $user->user_email;
                             break;
                     }
                 }
@@ -524,25 +524,25 @@ 
     }
 
     private function setup_invoice_key() {
-        $key = $this->get_meta( '_wpinv_key', true );
+        $key = $this->get_meta('_wpinv_key', true);
         
         return $key;
     }
 
     private function setup_invoice_number() {
-        $number = $this->get_meta( '_wpinv_number', true );
+        $number = $this->get_meta('_wpinv_number', true);
 
-        if ( !$number ) {
+        if (!$number) {
             $number = $this->ID;
 
-            if ( $this->status == 'auto-draft' ) {
-                if ( wpinv_sequential_number_active( $this->post_type ) ) {
-                    $next_number = wpinv_get_next_invoice_number( $this->post_type );
+            if ($this->status == 'auto-draft') {
+                if (wpinv_sequential_number_active($this->post_type)) {
+                    $next_number = wpinv_get_next_invoice_number($this->post_type);
                     $number      = $next_number;
                 }
             }
             
-            $number = wpinv_format_invoice_number( $number, $this->post_type );
+            $number = wpinv_format_invoice_number($number, $this->post_type);
         }
 
         return $number;
@@ -551,10 +551,10 @@ 
     private function insert_invoice() {
         global $wpdb;
 
-        if ( empty( $this->post_type ) ) {
-            if ( !empty( $this->ID ) && $post_type = get_post_type( $this->ID ) ) {
+        if (empty($this->post_type)) {
+            if (!empty($this->ID) && $post_type = get_post_type($this->ID)) {
                 $this->post_type = $post_type;
-            } else if ( !empty( $this->parent_invoice ) && $post_type = get_post_type( $this->parent_invoice ) ) {
+            } else if (!empty($this->parent_invoice) && $post_type = get_post_type($this->parent_invoice)) {
                 $this->post_type = $post_type;
             } else {
                 $this->post_type = 'wpi_invoice';
@@ -562,16 +562,16 @@ 
         }
 
         $invoice_number = $this->ID;
-        if ( $number = $this->get_meta( '_wpinv_number', true ) ) {
+        if ($number = $this->get_meta('_wpinv_number', true)) {
             $invoice_number = $number;
         }
 
-        if ( empty( $this->key ) ) {
+        if (empty($this->key)) {
             $this->key = self::generate_key();
             $this->pending['key'] = $this->key;
         }
 
-        if ( empty( $this->ip ) ) {
+        if (empty($this->ip)) {
             $this->ip = wpinv_get_ip();
             $this->pending['ip'] = $this->ip;
         }
@@ -608,61 +608,61 @@ 
                         'post_status'   => $this->status,
                         'post_author'   => $this->user_id,
                         'post_type'     => $this->post_type,
-                        'post_date'     => ! empty( $this->date ) && $this->date != '0000-00-00 00:00:00' ? $this->date : current_time( 'mysql' ),
-                        'post_date_gmt' => ! empty( $this->date ) && $this->date != '0000-00-00 00:00:00' ? get_gmt_from_date( $this->date ) : current_time( 'mysql', 1 ),
+                        'post_date'     => !empty($this->date) && $this->date != '0000-00-00 00:00:00' ? $this->date : current_time('mysql'),
+                        'post_date_gmt' => !empty($this->date) && $this->date != '0000-00-00 00:00:00' ? get_gmt_from_date($this->date) : current_time('mysql', 1),
                         'post_parent'   => $this->parent_invoice,
                     );
-        $args = apply_filters( 'wpinv_insert_invoice_args', $post_data, $this );
+        $args = apply_filters('wpinv_insert_invoice_args', $post_data, $this);
 
         // Create a blank invoice
-        if ( !empty( $this->ID ) ) {
-            $args['ID']         = $this->ID;
+        if (!empty($this->ID)) {
+            $args['ID'] = $this->ID;
 
-            $invoice_id = wp_update_post( $args, true );
+            $invoice_id = wp_update_post($args, true);
         } else {
-            $invoice_id = wp_insert_post( $args, true );
+            $invoice_id = wp_insert_post($args, true);
         }
 
-        if ( is_wp_error( $invoice_id ) ) {
+        if (is_wp_error($invoice_id)) {
             return false;
         }
 
-        if ( !empty( $invoice_id ) ) {
+        if (!empty($invoice_id)) {
             $this->ID  = $invoice_id;
             $this->_ID = $invoice_id;
 
-            $this->payment_meta = apply_filters( 'wpinv_payment_meta', $this->payment_meta, $payment_data );
-            if ( ! empty( $this->payment_meta['fees'] ) ) {
-                $this->fees = array_merge( $this->fees, $this->payment_meta['fees'] );
-                foreach( $this->fees as $fee ) {
-                    $this->increase_fees( $fee['amount'] );
+            $this->payment_meta = apply_filters('wpinv_payment_meta', $this->payment_meta, $payment_data);
+            if (!empty($this->payment_meta['fees'])) {
+                $this->fees = array_merge($this->fees, $this->payment_meta['fees']);
+                foreach ($this->fees as $fee) {
+                    $this->increase_fees($fee['amount']);
                 }
             }
 
-            $this->update_meta( '_wpinv_payment_meta', $this->payment_meta );            
+            $this->update_meta('_wpinv_payment_meta', $this->payment_meta);            
             $this->new = true;
         }
 
         return $this->ID;
     }
 
-    public function save( $setup = false ) {
+    public function save($setup = false) {
         global $wpi_session;
         
         $saved = false;
-        if ( empty( $this->items ) ) {
+        if (empty($this->items)) {
             return $saved; // Don't save empty invoice.
         }
         
-        if ( empty( $this->key ) ) {
+        if (empty($this->key)) {
             $this->key = self::generate_key();
             $this->pending['key'] = $this->key;
         }
         
-        if ( empty( $this->ID ) ) {
+        if (empty($this->ID)) {
             $invoice_id = $this->insert_invoice();
 
-            if ( false === $invoice_id ) {
+            if (false === $invoice_id) {
                 $saved = false;
             } else {
                 $this->ID = $invoice_id;
@@ -670,27 +670,27 @@ 
         }
 
         // If we have something pending, let's save it
-        if ( !empty( $this->pending ) ) {
+        if (!empty($this->pending)) {
             $total_increase = 0;
             $total_decrease = 0;
 
-            foreach ( $this->pending as $key => $value ) {
-                switch( $key ) {
+            foreach ($this->pending as $key => $value) {
+                switch ($key) {
                     case 'items':
                         // Update totals for pending items
-                        foreach ( $this->pending[ $key ] as $item ) {
-                            switch( $item['action'] ) {
+                        foreach ($this->pending[$key] as $item) {
+                            switch ($item['action']) {
                                 case 'add':
                                     $price = $item['price'];
                                     $taxes = $item['tax'];
 
-                                    if ( 'publish' === $this->status ) {
+                                    if ('publish' === $this->status) {
                                         $total_increase += $price;
                                     }
                                     break;
 
                                 case 'remove':
-                                    if ( 'publish' === $this->status ) {
+                                    if ('publish' === $this->status) {
                                         $total_decrease += $item['price'];
                                     }
                                     break;
@@ -698,16 +698,16 @@ 
                         }
                         break;
                     case 'fees':
-                        if ( 'publish' !== $this->status ) {
+                        if ('publish' !== $this->status) {
                             break;
                         }
 
-                        if ( empty( $this->pending[ $key ] ) ) {
+                        if (empty($this->pending[$key])) {
                             break;
                         }
 
-                        foreach ( $this->pending[ $key ] as $fee ) {
-                            switch( $fee['action'] ) {
+                        foreach ($this->pending[$key] as $fee) {
+                            switch ($fee['action']) {
                                 case 'add':
                                     $total_increase += $fee['amount'];
                                     break;
@@ -719,83 +719,83 @@ 
                         }
                         break;
                     case 'status':
-                        $this->update_status( $this->status );
+                        $this->update_status($this->status);
                         break;
                     case 'gateway':
-                        $this->update_meta( '_wpinv_gateway', $this->gateway );
+                        $this->update_meta('_wpinv_gateway', $this->gateway);
                         break;
                     case 'mode':
-                        $this->update_meta( '_wpinv_mode', $this->mode );
+                        $this->update_meta('_wpinv_mode', $this->mode);
                         break;
                     case 'transaction_id':
-                        $this->update_meta( '_wpinv_transaction_id', $this->transaction_id );
+                        $this->update_meta('_wpinv_transaction_id', $this->transaction_id);
                         break;
                     case 'ip':
-                        $this->update_meta( '_wpinv_user_ip', $this->ip );
+                        $this->update_meta('_wpinv_user_ip', $this->ip);
                         break;
                     ///case 'user_id':
                         ///$this->update_meta( '_wpinv_user_id', $this->user_id );
                         ///$this->user_info['user_id'] = $this->user_id;
                         ///break;
                     case 'first_name':
-                        $this->update_meta( '_wpinv_first_name', $this->first_name );
+                        $this->update_meta('_wpinv_first_name', $this->first_name);
                         $this->user_info['first_name'] = $this->first_name;
                         break;
                     case 'last_name':
-                        $this->update_meta( '_wpinv_last_name', $this->last_name );
+                        $this->update_meta('_wpinv_last_name', $this->last_name);
                         $this->user_info['last_name'] = $this->last_name;
                         break;
                     case 'phone':
-                        $this->update_meta( '_wpinv_phone', $this->phone );
+                        $this->update_meta('_wpinv_phone', $this->phone);
                         $this->user_info['phone'] = $this->phone;
                         break;
                     case 'address':
-                        $this->update_meta( '_wpinv_address', $this->address );
+                        $this->update_meta('_wpinv_address', $this->address);
                         $this->user_info['address'] = $this->address;
                         break;
                     case 'city':
-                        $this->update_meta( '_wpinv_city', $this->city );
+                        $this->update_meta('_wpinv_city', $this->city);
                         $this->user_info['city'] = $this->city;
                         break;
                     case 'country':
-                        $this->update_meta( '_wpinv_country', $this->country );
+                        $this->update_meta('_wpinv_country', $this->country);
                         $this->user_info['country'] = $this->country;
                         break;
                     case 'state':
-                        $this->update_meta( '_wpinv_state', $this->state );
+                        $this->update_meta('_wpinv_state', $this->state);
                         $this->user_info['state'] = $this->state;
                         break;
                     case 'zip':
-                        $this->update_meta( '_wpinv_zip', $this->zip );
+                        $this->update_meta('_wpinv_zip', $this->zip);
                         $this->user_info['zip'] = $this->zip;
                         break;
                     case 'company':
-                        $this->update_meta( '_wpinv_company', $this->company );
+                        $this->update_meta('_wpinv_company', $this->company);
                         $this->user_info['company'] = $this->company;
                         break;
                     case 'vat_number':
-                        $this->update_meta( '_wpinv_vat_number', $this->vat_number );
+                        $this->update_meta('_wpinv_vat_number', $this->vat_number);
                         $this->user_info['vat_number'] = $this->vat_number;
                         
-                        $vat_info = $wpi_session->get( 'user_vat_data' );
-                        if ( $this->vat_number && !empty( $vat_info ) && isset( $vat_info['number'] ) && isset( $vat_info['valid'] ) && $vat_info['number'] == $this->vat_number ) {
-                            $adddress_confirmed = isset( $vat_info['adddress_confirmed'] ) ? $vat_info['adddress_confirmed'] : false;
-                            $this->update_meta( '_wpinv_adddress_confirmed', (bool)$adddress_confirmed );
-                            $this->user_info['adddress_confirmed'] = (bool)$adddress_confirmed;
+                        $vat_info = $wpi_session->get('user_vat_data');
+                        if ($this->vat_number && !empty($vat_info) && isset($vat_info['number']) && isset($vat_info['valid']) && $vat_info['number'] == $this->vat_number) {
+                            $adddress_confirmed = isset($vat_info['adddress_confirmed']) ? $vat_info['adddress_confirmed'] : false;
+                            $this->update_meta('_wpinv_adddress_confirmed', (bool) $adddress_confirmed);
+                            $this->user_info['adddress_confirmed'] = (bool) $adddress_confirmed;
                         }
     
                         break;
                     case 'vat_rate':
-                        $this->update_meta( '_wpinv_vat_rate', $this->vat_rate );
+                        $this->update_meta('_wpinv_vat_rate', $this->vat_rate);
                         $this->user_info['vat_rate'] = $this->vat_rate;
                         break;
                     case 'adddress_confirmed':
-                        $this->update_meta( '_wpinv_adddress_confirmed', $this->adddress_confirmed );
+                        $this->update_meta('_wpinv_adddress_confirmed', $this->adddress_confirmed);
                         $this->user_info['adddress_confirmed'] = $this->adddress_confirmed;
                         break;
                     
                     case 'key':
-                        $this->update_meta( '_wpinv_key', $this->key );
+                        $this->update_meta('_wpinv_key', $this->key);
                         break;
                     case 'date':
                         $args = array(
@@ -804,49 +804,49 @@ 
                             'edit_date' => true,
                         );
 
-                        wp_update_post( $args );
+                        wp_update_post($args);
                         break;
                     case 'due_date':
-                        if ( empty( $this->due_date ) ) {
+                        if (empty($this->due_date)) {
                             $this->due_date = 'none';
                         }
                         
-                        $this->update_meta( '_wpinv_due_date', $this->due_date );
+                        $this->update_meta('_wpinv_due_date', $this->due_date);
                         break;
                     case 'completed_date':
-                        $this->update_meta( '_wpinv_completed_date', $this->completed_date );
+                        $this->update_meta('_wpinv_completed_date', $this->completed_date);
                         break;
                     case 'discounts':
-                        if ( ! is_array( $this->discounts ) ) {
-                            $this->discounts = explode( ',', $this->discounts );
+                        if (!is_array($this->discounts)) {
+                            $this->discounts = explode(',', $this->discounts);
                         }
 
-                        $this->user_info['discount'] = implode( ',', $this->discounts );
+                        $this->user_info['discount'] = implode(',', $this->discounts);
                         break;
                     case 'discount':
-                        $this->update_meta( '_wpinv_discount', wpinv_round_amount( $this->discount ) );
+                        $this->update_meta('_wpinv_discount', wpinv_round_amount($this->discount));
                         break;
                     case 'discount_code':
-                        $this->update_meta( '_wpinv_discount_code', $this->discount_code );
+                        $this->update_meta('_wpinv_discount_code', $this->discount_code);
                         break;
                     case 'parent_invoice':
                         $args = array(
                             'ID'          => $this->ID,
                             'post_parent' => $this->parent_invoice,
                         );
-                        wp_update_post( $args );
+                        wp_update_post($args);
                         break;
                     default:
-                        do_action( 'wpinv_save', $this, $key );
+                        do_action('wpinv_save', $this, $key);
                         break;
                 }
             }
 
-            $this->update_meta( '_wpinv_subtotal', wpinv_round_amount( $this->subtotal ) );
-            $this->update_meta( '_wpinv_total', wpinv_round_amount( $this->total ) );
-            $this->update_meta( '_wpinv_tax', wpinv_round_amount( $this->tax ) );
+            $this->update_meta('_wpinv_subtotal', wpinv_round_amount($this->subtotal));
+            $this->update_meta('_wpinv_total', wpinv_round_amount($this->total));
+            $this->update_meta('_wpinv_tax', wpinv_round_amount($this->tax));
             
-            $this->items    = array_values( $this->items );
+            $this->items = array_values($this->items);
             
             $new_meta = array(
                 'items'         => $this->items,
@@ -857,12 +857,12 @@ 
             );
             
             $meta        = $this->get_meta();
-            $merged_meta = array_merge( $meta, $new_meta );
+            $merged_meta = array_merge($meta, $new_meta);
 
             // Only save the payment meta if it's changed
-            if ( md5( serialize( $meta ) ) !== md5( serialize( $merged_meta) ) ) {
-                $updated     = $this->update_meta( '_wpinv_payment_meta', $merged_meta );
-                if ( false !== $updated ) {
+            if (md5(serialize($meta)) !== md5(serialize($merged_meta))) {
+                $updated = $this->update_meta('_wpinv_payment_meta', $merged_meta);
+                if (false !== $updated) {
                     $saved = true;
                 }
             }
@@ -870,15 +870,15 @@ 
             $this->pending = array();
             $saved         = true;
         } else {
-            $this->update_meta( '_wpinv_subtotal', wpinv_round_amount( $this->subtotal ) );
-            $this->update_meta( '_wpinv_total', wpinv_round_amount( $this->total ) );
-            $this->update_meta( '_wpinv_tax', wpinv_round_amount( $this->tax ) );
+            $this->update_meta('_wpinv_subtotal', wpinv_round_amount($this->subtotal));
+            $this->update_meta('_wpinv_total', wpinv_round_amount($this->total));
+            $this->update_meta('_wpinv_tax', wpinv_round_amount($this->tax));
         }
         
-        do_action( 'wpinv_invoice_save', $this, $saved );
+        do_action('wpinv_invoice_save', $this, $saved);
 
-        if ( true === $saved || $setup ) {
-            $this->setup_invoice( $this->ID );
+        if (true === $saved || $setup) {
+            $this->setup_invoice($this->ID);
         }
         
         $this->refresh_item_ids();
@@ -886,7 +886,7 @@ 
         return $saved;
     }
     
-    public function add_fee( $args, $global = true ) {
+    public function add_fee($args, $global = true) {
         $default_args = array(
             'label'       => '',
             'amount'      => 0,
@@ -896,75 +896,75 @@ 
             'item_id'     => 0,
         );
 
-        $fee = wp_parse_args( $args, $default_args );
+        $fee = wp_parse_args($args, $default_args);
         
-        if ( empty( $fee['label'] ) ) {
+        if (empty($fee['label'])) {
             return false;
         }
         
-        $fee['id']  = sanitize_title( $fee['label'] );
+        $fee['id'] = sanitize_title($fee['label']);
         
-        $this->fees[]               = $fee;
+        $this->fees[] = $fee;
         
         $added_fee               = $fee;
         $added_fee['action']     = 'add';
         $this->pending['fees'][] = $added_fee;
-        reset( $this->fees );
+        reset($this->fees);
 
-        $this->increase_fees( $fee['amount'] );
+        $this->increase_fees($fee['amount']);
         return true;
     }
 
-    public function remove_fee( $key ) {
+    public function remove_fee($key) {
         $removed = false;
 
-        if ( is_numeric( $key ) ) {
-            $removed = $this->remove_fee_by( 'index', $key );
+        if (is_numeric($key)) {
+            $removed = $this->remove_fee_by('index', $key);
         }
 
         return $removed;
     }
 
-    public function remove_fee_by( $key, $value, $global = false ) {
-        $allowed_fee_keys = apply_filters( 'wpinv_fee_keys', array(
+    public function remove_fee_by($key, $value, $global = false) {
+        $allowed_fee_keys = apply_filters('wpinv_fee_keys', array(
             'index', 'label', 'amount', 'type',
-        ) );
+        ));
 
-        if ( ! in_array( $key, $allowed_fee_keys ) ) {
+        if (!in_array($key, $allowed_fee_keys)) {
             return false;
         }
 
         $removed = false;
-        if ( 'index' === $key && array_key_exists( $value, $this->fees ) ) {
-            $removed_fee             = $this->fees[ $value ];
+        if ('index' === $key && array_key_exists($value, $this->fees)) {
+            $removed_fee             = $this->fees[$value];
             $removed_fee['action']   = 'remove';
             $this->pending['fees'][] = $removed_fee;
 
-            $this->decrease_fees( $removed_fee['amount'] );
+            $this->decrease_fees($removed_fee['amount']);
 
-            unset( $this->fees[ $value ] );
+            unset($this->fees[$value]);
             $removed = true;
-        } else if ( 'index' !== $key ) {
-            foreach ( $this->fees as $index => $fee ) {
-                if ( isset( $fee[ $key ] ) && $fee[ $key ] == $value ) {
+        } else if ('index' !== $key) {
+            foreach ($this->fees as $index => $fee) {
+                if (isset($fee[$key]) && $fee[$key] == $value) {
                     $removed_fee             = $fee;
                     $removed_fee['action']   = 'remove';
                     $this->pending['fees'][] = $removed_fee;
 
-                    $this->decrease_fees( $removed_fee['amount'] );
+                    $this->decrease_fees($removed_fee['amount']);
 
-                    unset( $this->fees[ $index ] );
+                    unset($this->fees[$index]);
                     $removed = true;
 
-                    if ( false === $global ) {
+                    if (false === $global) {
                         break;
                     }
                 }
             }
         }
 
-        if ( true === $removed ) {
-            $this->fees = array_values( $this->fees );
+        if (true === $removed) {
+            $this->fees = array_values($this->fees);
         }
 
         return $removed;
@@ -972,35 +972,35 @@ 
 
     
 
-    public function add_note( $note = '', $customer_type = false, $added_by_user = false, $system = false ) {
+    public function add_note($note = '', $customer_type = false, $added_by_user = false, $system = false) {
         // Bail if no note specified
-        if( !$note ) {
+        if (!$note) {
             return false;
         }
 
-        if ( empty( $this->ID ) )
+        if (empty($this->ID))
             return false;
         
-        if ( ( ( is_user_logged_in() && wpinv_current_user_can_manage_invoicing() ) || $added_by_user ) && !$system ) {
-            $user                 = get_user_by( 'id', get_current_user_id() );
+        if (((is_user_logged_in() && wpinv_current_user_can_manage_invoicing()) || $added_by_user) && !$system) {
+            $user                 = get_user_by('id', get_current_user_id());
             $comment_author       = $user->display_name;
             $comment_author_email = $user->user_email;
         } else {
             $comment_author       = 'System';
             $comment_author_email = 'system@';
-            $comment_author_email .= isset( $_SERVER['HTTP_HOST'] ) ? str_replace( 'www.', '', $_SERVER['HTTP_HOST'] ) : 'noreply.com';
-            $comment_author_email = sanitize_email( $comment_author_email );
+            $comment_author_email .= isset($_SERVER['HTTP_HOST']) ? str_replace('www.', '', $_SERVER['HTTP_HOST']) : 'noreply.com';
+            $comment_author_email = sanitize_email($comment_author_email);
         }
 
-        do_action( 'wpinv_pre_insert_invoice_note', $this->ID, $note, $customer_type );
+        do_action('wpinv_pre_insert_invoice_note', $this->ID, $note, $customer_type);
 
-        $note_id = wp_insert_comment( wp_filter_comment( array(
+        $note_id = wp_insert_comment(wp_filter_comment(array(
             'comment_post_ID'      => $this->ID,
             'comment_content'      => $note,
             'comment_agent'        => 'WPInvoicing',
             'user_id'              => is_admin() ? get_current_user_id() : 0,
-            'comment_date'         => current_time( 'mysql' ),
-            'comment_date_gmt'     => current_time( 'mysql', 1 ),
+            'comment_date'         => current_time('mysql'),
+            'comment_date_gmt'     => current_time('mysql', 1),
             'comment_approved'     => 1,
             'comment_parent'       => 0,
             'comment_author'       => $comment_author,
@@ -1008,53 +1008,53 @@ 
             'comment_author_url'   => '',
             'comment_author_email' => $comment_author_email,
             'comment_type'         => 'wpinv_note'
-        ) ) );
+        )));
 
-        do_action( 'wpinv_insert_payment_note', $note_id, $this->ID, $note );
+        do_action('wpinv_insert_payment_note', $note_id, $this->ID, $note);
         
-        if ( $customer_type ) {
-            add_comment_meta( $note_id, '_wpi_customer_note', 1 );
+        if ($customer_type) {
+            add_comment_meta($note_id, '_wpi_customer_note', 1);
 
-            do_action( 'wpinv_new_customer_note', array( 'invoice_id' => $this->ID, 'user_note' => $note ) );
+            do_action('wpinv_new_customer_note', array('invoice_id' => $this->ID, 'user_note' => $note));
         }
 
         return $note_id;
     }
 
-    private function increase_subtotal( $amount = 0.00 ) {
+    private function increase_subtotal($amount = 0.00) {
         $amount          = (float) $amount;
         $this->subtotal += $amount;
-        $this->subtotal  = wpinv_round_amount( $this->subtotal );
+        $this->subtotal  = wpinv_round_amount($this->subtotal);
 
         $this->recalculate_total();
     }
 
-    private function decrease_subtotal( $amount = 0.00 ) {
+    private function decrease_subtotal($amount = 0.00) {
         $amount          = (float) $amount;
         $this->subtotal -= $amount;
-        $this->subtotal  = wpinv_round_amount( $this->subtotal );
+        $this->subtotal  = wpinv_round_amount($this->subtotal);
 
-        if ( $this->subtotal < 0 ) {
+        if ($this->subtotal < 0) {
             $this->subtotal = 0;
         }
 
         $this->recalculate_total();
     }
 
-    private function increase_fees( $amount = 0.00 ) {
-        $amount            = (float)$amount;
+    private function increase_fees($amount = 0.00) {
+        $amount            = (float) $amount;
         $this->fees_total += $amount;
-        $this->fees_total  = wpinv_round_amount( $this->fees_total );
+        $this->fees_total  = wpinv_round_amount($this->fees_total);
 
         $this->recalculate_total();
     }
 
-    private function decrease_fees( $amount = 0.00 ) {
+    private function decrease_fees($amount = 0.00) {
         $amount            = (float) $amount;
         $this->fees_total -= $amount;
-        $this->fees_total  = wpinv_round_amount( $this->fees_total );
+        $this->fees_total  = wpinv_round_amount($this->fees_total);
 
-        if ( $this->fees_total < 0 ) {
+        if ($this->fees_total < 0) {
             $this->fees_total = 0;
         }
 
@@ -1065,54 +1065,54 @@ 
         global $wpi_nosave;
         
         $this->total = $this->subtotal + $this->tax + $this->fees_total;
-        $this->total = wpinv_round_amount( $this->total );
+        $this->total = wpinv_round_amount($this->total);
         
-        do_action( 'wpinv_invoice_recalculate_total', $this, $wpi_nosave );
+        do_action('wpinv_invoice_recalculate_total', $this, $wpi_nosave);
     }
     
-    public function increase_tax( $amount = 0.00 ) {
+    public function increase_tax($amount = 0.00) {
         $amount       = (float) $amount;
         $this->tax   += $amount;
 
         $this->recalculate_total();
     }
 
-    public function decrease_tax( $amount = 0.00 ) {
+    public function decrease_tax($amount = 0.00) {
         $amount     = (float) $amount;
         $this->tax -= $amount;
 
-        if ( $this->tax < 0 ) {
+        if ($this->tax < 0) {
             $this->tax = 0;
         }
 
         $this->recalculate_total();
     }
 
-    public function update_status( $new_status = false, $note = '', $manual = false ) {
-        $old_status = ! empty( $this->old_status ) ? $this->old_status : get_post_status( $this->ID );
+    public function update_status($new_status = false, $note = '', $manual = false) {
+        $old_status = !empty($this->old_status) ? $this->old_status : get_post_status($this->ID);
 
-        if ( $old_status === $new_status && in_array( $new_status, array_keys( wpinv_get_invoice_statuses( true ) ) ) ) {
+        if ($old_status === $new_status && in_array($new_status, array_keys(wpinv_get_invoice_statuses(true)))) {
             return false; // Don't permit status changes that aren't changes
         }
 
-        $do_change = apply_filters( 'wpinv_should_update_invoice_status', true, $this->ID, $new_status, $old_status );
+        $do_change = apply_filters('wpinv_should_update_invoice_status', true, $this->ID, $new_status, $old_status);
         $updated = false;
 
-        if ( $do_change ) {
-            do_action( 'wpinv_before_invoice_status_change', $this->ID, $new_status, $old_status );
+        if ($do_change) {
+            do_action('wpinv_before_invoice_status_change', $this->ID, $new_status, $old_status);
 
             $update_post_data                   = array();
             $update_post_data['ID']             = $this->ID;
             $update_post_data['post_status']    = $new_status;
-            $update_post_data['edit_date']      = current_time( 'mysql', 0 );
-            $update_post_data['edit_date_gmt']  = current_time( 'mysql', 1 );
+            $update_post_data['edit_date']      = current_time('mysql', 0);
+            $update_post_data['edit_date_gmt']  = current_time('mysql', 1);
             
-            $update_post_data = apply_filters( 'wpinv_update_invoice_status_fields', $update_post_data, $this->ID );
+            $update_post_data = apply_filters('wpinv_update_invoice_status_fields', $update_post_data, $this->ID);
 
-            $updated = wp_update_post( $update_post_data );     
+            $updated = wp_update_post($update_post_data);     
            
             // Process any specific status functions
-            switch( $new_status ) {
+            switch ($new_status) {
                 case 'wpi-refunded':
                     $this->process_refund();
                     break;
@@ -1125,9 +1125,9 @@ 
             }
             
             // Status was changed.
-            do_action( 'wpinv_status_' . $new_status, $this->ID, $old_status );
-            do_action( 'wpinv_status_' . $old_status . '_to_' . $new_status, $this->ID, $old_status );
-            do_action( 'wpinv_update_status', $this->ID, $new_status, $old_status );
+            do_action('wpinv_status_' . $new_status, $this->ID, $old_status);
+            do_action('wpinv_status_' . $old_status . '_to_' . $new_status, $this->ID, $old_status);
+            do_action('wpinv_update_status', $this->ID, $new_status, $old_status);
         }
 
         return $updated;
@@ -1141,20 +1141,20 @@ 
         $this->save();
     }
 
-    public function update_meta( $meta_key = '', $meta_value = '', $prev_value = '' ) {
-        if ( empty( $meta_key ) ) {
+    public function update_meta($meta_key = '', $meta_value = '', $prev_value = '') {
+        if (empty($meta_key)) {
             return false;
         }
 
-        if ( $meta_key == 'key' || $meta_key == 'date' ) {
+        if ($meta_key == 'key' || $meta_key == 'date') {
             $current_meta = $this->get_meta();
-            $current_meta[ $meta_key ] = $meta_value;
+            $current_meta[$meta_key] = $meta_value;
 
             $meta_key     = '_wpinv_payment_meta';
             $meta_value   = $current_meta;
         }
 
-        $meta_value = apply_filters( 'wpinv_update_payment_meta_' . $meta_key, $meta_value, $this->ID );
+        $meta_value = apply_filters('wpinv_update_payment_meta_' . $meta_key, $meta_value, $this->ID);
         
         // Do not update created date on invoice marked as paid.
         /*if ( $meta_key == '_wpinv_completed_date' && !empty( $meta_value ) ) {
@@ -1169,45 +1169,45 @@ 
             wp_update_post( $args );
         }*/
         
-        return update_post_meta( $this->ID, $meta_key, $meta_value, $prev_value );
+        return update_post_meta($this->ID, $meta_key, $meta_value, $prev_value);
     }
 
     private function process_refund() {
         $process_refund = true;
 
         // If the payment was not in publish, don't decrement stats as they were never incremented
-        if ( 'publish' != $this->old_status || 'wpi-refunded' != $this->status ) {
+        if ('publish' != $this->old_status || 'wpi-refunded' != $this->status) {
             $process_refund = false;
         }
 
         // Allow extensions to filter for their own payment types, Example: Recurring Payments
-        $process_refund = apply_filters( 'wpinv_should_process_refund', $process_refund, $this );
+        $process_refund = apply_filters('wpinv_should_process_refund', $process_refund, $this);
 
-        if ( false === $process_refund ) {
+        if (false === $process_refund) {
             return;
         }
 
-        do_action( 'wpinv_pre_refund_invoice', $this );
+        do_action('wpinv_pre_refund_invoice', $this);
         
-        $decrease_store_earnings = apply_filters( 'wpinv_decrease_store_earnings_on_refund', true, $this );
-        $decrease_customer_value = apply_filters( 'wpinv_decrease_customer_value_on_refund', true, $this );
-        $decrease_purchase_count = apply_filters( 'wpinv_decrease_customer_purchase_count_on_refund', true, $this );
+        $decrease_store_earnings = apply_filters('wpinv_decrease_store_earnings_on_refund', true, $this);
+        $decrease_customer_value = apply_filters('wpinv_decrease_customer_value_on_refund', true, $this);
+        $decrease_purchase_count = apply_filters('wpinv_decrease_customer_purchase_count_on_refund', true, $this);
         
-        do_action( 'wpinv_post_refund_invoice', $this );
+        do_action('wpinv_post_refund_invoice', $this);
     }
 
     private function process_failure() {
         $discounts = $this->discounts;
-        if ( empty( $discounts ) ) {
+        if (empty($discounts)) {
             return;
         }
 
-        if ( ! is_array( $discounts ) ) {
-            $discounts = array_map( 'trim', explode( ',', $discounts ) );
+        if (!is_array($discounts)) {
+            $discounts = array_map('trim', explode(',', $discounts));
         }
 
-        foreach ( $discounts as $discount ) {
-            wpinv_decrease_discount_usage( $discount );
+        foreach ($discounts as $discount) {
+            wpinv_decrease_discount_usage($discount);
         }
     }
     
@@ -1215,92 +1215,92 @@ 
         $process_pending = true;
 
         // If the payment was not in publish or revoked status, don't decrement stats as they were never incremented
-        if ( ( 'publish' != $this->old_status && 'revoked' != $this->old_status ) || 'wpi-pending' != $this->status ) {
+        if (('publish' != $this->old_status && 'revoked' != $this->old_status) || 'wpi-pending' != $this->status) {
             $process_pending = false;
         }
 
         // Allow extensions to filter for their own payment types, Example: Recurring Payments
-        $process_pending = apply_filters( 'wpinv_should_process_pending', $process_pending, $this );
+        $process_pending = apply_filters('wpinv_should_process_pending', $process_pending, $this);
 
-        if ( false === $process_pending ) {
+        if (false === $process_pending) {
             return;
         }
 
-        $decrease_store_earnings = apply_filters( 'wpinv_decrease_store_earnings_on_pending', true, $this );
-        $decrease_customer_value = apply_filters( 'wpinv_decrease_customer_value_on_pending', true, $this );
-        $decrease_purchase_count = apply_filters( 'wpinv_decrease_customer_purchase_count_on_pending', true, $this );
+        $decrease_store_earnings = apply_filters('wpinv_decrease_store_earnings_on_pending', true, $this);
+        $decrease_customer_value = apply_filters('wpinv_decrease_customer_value_on_pending', true, $this);
+        $decrease_purchase_count = apply_filters('wpinv_decrease_customer_purchase_count_on_pending', true, $this);
 
         $this->completed_date = '';
-        $this->update_meta( '_wpinv_completed_date', '' );
+        $this->update_meta('_wpinv_completed_date', '');
     }
     
     // get data
-    public function get_meta( $meta_key = '_wpinv_payment_meta', $single = true ) {
-        $meta = get_post_meta( $this->ID, $meta_key, $single );
+    public function get_meta($meta_key = '_wpinv_payment_meta', $single = true) {
+        $meta = get_post_meta($this->ID, $meta_key, $single);
 
-        if ( $meta_key === '_wpinv_payment_meta' ) {
+        if ($meta_key === '_wpinv_payment_meta') {
 
-            if(!is_array($meta)){$meta = array();} // we need this to be an array so make sure it is.
+            if (!is_array($meta)) {$meta = array(); } // we need this to be an array so make sure it is.
 
-            if ( empty( $meta['key'] ) ) {
+            if (empty($meta['key'])) {
                 $meta['key'] = $this->setup_invoice_key();
             }
 
-            if ( empty( $meta['date'] ) ) {
-                $meta['date'] = get_post_field( 'post_date', $this->ID );
+            if (empty($meta['date'])) {
+                $meta['date'] = get_post_field('post_date', $this->ID);
             }
         }
 
-        $meta = apply_filters( 'wpinv_get_invoice_meta_' . $meta_key, $meta, $this->ID );
+        $meta = apply_filters('wpinv_get_invoice_meta_' . $meta_key, $meta, $this->ID);
 
-        return apply_filters( 'wpinv_get_invoice_meta', $meta, $this->ID, $meta_key );
+        return apply_filters('wpinv_get_invoice_meta', $meta, $this->ID, $meta_key);
     }
     
     public function get_description() {
-        $post = get_post( $this->ID );
+        $post = get_post($this->ID);
         
-        $description = !empty( $post ) ? $post->post_content : '';
-        return apply_filters( 'wpinv_get_description', $description, $this->ID, $this );
+        $description = !empty($post) ? $post->post_content : '';
+        return apply_filters('wpinv_get_description', $description, $this->ID, $this);
     }
     
-    public function get_status( $nicename = false ) {
-        if ( !$nicename ) {
+    public function get_status($nicename = false) {
+        if (!$nicename) {
             $status = $this->status;
         } else {
             $status = $this->status_nicename;
         }
         
-        return apply_filters( 'wpinv_get_status', $status, $nicename, $this->ID, $this );
+        return apply_filters('wpinv_get_status', $status, $nicename, $this->ID, $this);
     }
     
     public function get_cart_details() {
-        return apply_filters( 'wpinv_cart_details', $this->cart_details, $this->ID, $this );
+        return apply_filters('wpinv_cart_details', $this->cart_details, $this->ID, $this);
     }
     
-    public function get_subtotal( $currency = false ) {
-        $subtotal = wpinv_round_amount( $this->subtotal );
+    public function get_subtotal($currency = false) {
+        $subtotal = wpinv_round_amount($this->subtotal);
         
-        if ( $currency ) {
-            $subtotal = wpinv_price( wpinv_format_amount( $subtotal, NULL, !$currency ), $this->get_currency() );
+        if ($currency) {
+            $subtotal = wpinv_price(wpinv_format_amount($subtotal, NULL, !$currency), $this->get_currency());
         }
         
-        return apply_filters( 'wpinv_get_invoice_subtotal', $subtotal, $this->ID, $this, $currency );
+        return apply_filters('wpinv_get_invoice_subtotal', $subtotal, $this->ID, $this, $currency);
     }
     
-    public function get_total( $currency = false ) {        
-        if ( $this->is_free_trial() ) {
-            $total = wpinv_round_amount( 0 );
+    public function get_total($currency = false) {        
+        if ($this->is_free_trial()) {
+            $total = wpinv_round_amount(0);
         } else {
-            $total = wpinv_round_amount( $this->total );
+            $total = wpinv_round_amount($this->total);
         }
-        if ( $currency ) {
-            $total = wpinv_price( wpinv_format_amount( $total, NULL, !$currency ), $this->get_currency() );
+        if ($currency) {
+            $total = wpinv_price(wpinv_format_amount($total, NULL, !$currency), $this->get_currency());
         }
         
-        return apply_filters( 'wpinv_get_invoice_total', $total, $this->ID, $this, $currency );
+        return apply_filters('wpinv_get_invoice_total', $total, $this->ID, $this, $currency);
     }
     
-    public function get_recurring_details( $field = '', $currency = false ) {        
+    public function get_recurring_details($field = '', $currency = false) {        
         $data                 = array();
         $data['cart_details'] = $this->cart_details;
         $data['subtotal']     = $this->get_subtotal();
@@ -1308,74 +1308,74 @@ 
         $data['tax']          = $this->get_tax();
         $data['total']        = $this->get_total();
 
-        if ( !empty( $this->cart_details ) && ( $this->is_parent() || $this->is_renewal() ) ) {
+        if (!empty($this->cart_details) && ($this->is_parent() || $this->is_renewal())) {
             $is_free_trial = $this->is_free_trial();
-            $discounts = $this->get_discounts( true );
+            $discounts = $this->get_discounts(true);
             
-            if ( $is_free_trial || !empty( $discounts ) ) {
+            if ($is_free_trial || !empty($discounts)) {
                 $first_use_only = false;
                 
-                if ( !empty( $discounts ) ) {
-                    foreach ( $discounts as $key => $code ) {
-                        if ( wpinv_discount_is_recurring( $code, true ) && ! $this->is_renewal() ) {
+                if (!empty($discounts)) {
+                    foreach ($discounts as $key => $code) {
+                        if (wpinv_discount_is_recurring($code, true) && !$this->is_renewal()) {
                             $first_use_only = true;
                             break;
                         }
                     }
                 }
                     
-                if ( !$first_use_only ) {
-                    $data['subtotal'] = wpinv_round_amount( $this->subtotal );
-                    $data['discount'] = wpinv_round_amount( $this->discount );
-                    $data['tax']      = wpinv_round_amount( $this->tax );
-                    $data['total']    = wpinv_round_amount( $this->total );
+                if (!$first_use_only) {
+                    $data['subtotal'] = wpinv_round_amount($this->subtotal);
+                    $data['discount'] = wpinv_round_amount($this->discount);
+                    $data['tax']      = wpinv_round_amount($this->tax);
+                    $data['total']    = wpinv_round_amount($this->total);
                 } else {
                     $cart_subtotal   = 0;
                     $cart_discount   = $this->discount;
                     $cart_tax        = 0;
 
-                    foreach ( $this->cart_details as $key => $item ) {
-                        $item_quantity  = $item['quantity'] > 0 ? absint( $item['quantity'] ) : 1;
-                        $item_subtotal  = !empty( $item['subtotal'] ) ? $item['subtotal'] : $item['item_price'] * $item_quantity;
+                    foreach ($this->cart_details as $key => $item) {
+                        $item_quantity  = $item['quantity'] > 0 ? absint($item['quantity']) : 1;
+                        $item_subtotal  = !empty($item['subtotal']) ? $item['subtotal'] : $item['item_price'] * $item_quantity;
                         $item_discount  = 0;
-                        $item_tax       = $item_subtotal > 0 && !empty( $item['vat_rate'] ) ? ( $item_subtotal * 0.01 * (float)$item['vat_rate'] ) : 0;
+                        $item_tax       = $item_subtotal > 0 && !empty($item['vat_rate']) ? ($item_subtotal * 0.01 * (float) $item['vat_rate']) : 0;
                         
-                        if ( wpinv_prices_include_tax() ) {
-                            $item_subtotal -= wpinv_round_amount( $item_tax );
+                        if (wpinv_prices_include_tax()) {
+                            $item_subtotal -= wpinv_round_amount($item_tax);
                         }
                         
                         $item_total     = $item_subtotal - $item_discount + $item_tax;
                         // Do not allow totals to go negative
-                        if ( $item_total < 0 ) {
+                        if ($item_total < 0) {
                             $item_total = 0;
                         }
                         
-                        $cart_subtotal  += (float)($item_subtotal);
-                        $cart_discount  += (float)($item_discount);
-                        $cart_tax       += (float)($item_tax);
+                        $cart_subtotal  += (float) ($item_subtotal);
+                        $cart_discount  += (float) ($item_discount);
+                        $cart_tax       += (float) ($item_tax);
                         
-                        $data['cart_details'][$key]['discount']   = wpinv_round_amount( $item_discount );
-                        $data['cart_details'][$key]['tax']        = wpinv_round_amount( $item_tax );
-                        $data['cart_details'][$key]['price']      = wpinv_round_amount( $item_total );
+                        $data['cart_details'][$key]['discount']   = wpinv_round_amount($item_discount);
+                        $data['cart_details'][$key]['tax']        = wpinv_round_amount($item_tax);
+                        $data['cart_details'][$key]['price']      = wpinv_round_amount($item_total);
                     }
 
 	                $total = $data['subtotal'] - $data['discount'] + $data['tax'];
-	                if ( $total < 0 ) {
+	                if ($total < 0) {
 		                $total = 0;
 	                }
 
-                    $data['subtotal'] = wpinv_round_amount( $cart_subtotal );
-                    $data['discount'] = wpinv_round_amount( $cart_discount );
-                    $data['tax']      = wpinv_round_amount( $cart_tax );
-                    $data['total']    = wpinv_round_amount( $total );
+                    $data['subtotal'] = wpinv_round_amount($cart_subtotal);
+                    $data['discount'] = wpinv_round_amount($cart_discount);
+                    $data['tax']      = wpinv_round_amount($cart_tax);
+                    $data['total']    = wpinv_round_amount($total);
                 }
             }
         }
 
-        $data = apply_filters( 'wpinv_get_invoice_recurring_details', $data, $this, $field, $currency );
+        $data = apply_filters('wpinv_get_invoice_recurring_details', $data, $this, $field, $currency);
 
-        if ( isset( $data[$field] ) ) {
-            return ( $currency ? wpinv_price( $data[$field], $this->get_currency() ) : $data[$field] );
+        if (isset($data[$field])) {
+            return ($currency ? wpinv_price($data[$field], $this->get_currency()) : $data[$field]);
         }
         
         return $data;
@@ -1390,18 +1390,18 @@ 
     public function has_non_recurring_discount() {
 
         // If the invoice is made up of free items, abort
-        if ( ! $this->get_subtotal() > 0 ) {
+        if (!$this->get_subtotal() > 0) {
             return false;
         }
 
         // Ensure there are discounts
-        $discounts = $this->get_discounts( true );
-        if ( empty( $discounts ) ) {
+        $discounts = $this->get_discounts(true);
+        if (empty($discounts)) {
             return false;
         }
 
-        foreach ( array_values( $discounts ) as $discount_code ) {
-            if ( ! wpinv_discount_is_recurring( null, $discount_code ) && wpinv_get_discount_amount( $discount_code ) > 0 ) {
+        foreach (array_values($discounts) as $discount_code) {
+            if (!wpinv_discount_is_recurring(null, $discount_code) && wpinv_get_discount_amount($discount_code) > 0) {
                 return true;
             }
         }
@@ -1409,91 +1409,91 @@ 
         return false;
     }
     
-    public function get_final_tax( $currency = false ) {        
-        $final_total = wpinv_round_amount( $this->tax );
-        if ( $currency ) {
-            $final_total = wpinv_price( wpinv_format_amount( $final_total, NULL, !$currency ), $this->get_currency() );
+    public function get_final_tax($currency = false) {        
+        $final_total = wpinv_round_amount($this->tax);
+        if ($currency) {
+            $final_total = wpinv_price(wpinv_format_amount($final_total, NULL, !$currency), $this->get_currency());
         }
         
-        return apply_filters( 'wpinv_get_invoice_final_total', $final_total, $this, $currency );
+        return apply_filters('wpinv_get_invoice_final_total', $final_total, $this, $currency);
     }
     
-    public function get_discounts( $array = false ) {
+    public function get_discounts($array = false) {
         $discounts = $this->discounts;
-        if ( $array && $discounts ) {
-            $discounts = explode( ',', $discounts );
+        if ($array && $discounts) {
+            $discounts = explode(',', $discounts);
         }
-        return apply_filters( 'wpinv_payment_discounts', $discounts, $this->ID, $this, $array );
+        return apply_filters('wpinv_payment_discounts', $discounts, $this->ID, $this, $array);
     }
     
-    public function get_discount( $currency = false, $dash = false ) {
-        if ( !empty( $this->discounts ) ) {
+    public function get_discount($currency = false, $dash = false) {
+        if (!empty($this->discounts)) {
             global $ajax_cart_details;
             $ajax_cart_details = $this->get_cart_details();
             
-            if ( !empty( $ajax_cart_details ) && count( $ajax_cart_details ) == count( $this->items ) ) {
+            if (!empty($ajax_cart_details) && count($ajax_cart_details) == count($this->items)) {
                 $cart_items = $ajax_cart_details;
             } else {
                 $cart_items = $this->items;
             }
 
-            $this->discount = wpinv_get_cart_items_discount_amount( $cart_items , $this->discounts );
+            $this->discount = wpinv_get_cart_items_discount_amount($cart_items, $this->discounts);
         }
-        $discount   = wpinv_round_amount( $this->discount );
+        $discount   = wpinv_round_amount($this->discount);
         $dash       = $dash && $discount > 0 ? '&ndash;' : '';
         
-        if ( $currency ) {
-            $discount = wpinv_price( wpinv_format_amount( $discount, NULL, !$currency ), $this->get_currency() );
+        if ($currency) {
+            $discount = wpinv_price(wpinv_format_amount($discount, NULL, !$currency), $this->get_currency());
         }
         
-        $discount   = $dash . $discount;
+        $discount = $dash . $discount;
         
-        return apply_filters( 'wpinv_get_invoice_discount', $discount, $this->ID, $this, $currency, $dash );
+        return apply_filters('wpinv_get_invoice_discount', $discount, $this->ID, $this, $currency, $dash);
     }
     
     public function get_discount_code() {
         return $this->discount_code;
     }
     
-    public function get_tax( $currency = false ) {
-        $tax = wpinv_round_amount( $this->tax );
+    public function get_tax($currency = false) {
+        $tax = wpinv_round_amount($this->tax);
         
-        if ( $currency ) {
-            $tax = wpinv_price( wpinv_format_amount( $tax, NULL, !$currency ), $this->get_currency() );
+        if ($currency) {
+            $tax = wpinv_price(wpinv_format_amount($tax, NULL, !$currency), $this->get_currency());
         }
         
-        return apply_filters( 'wpinv_get_invoice_tax', $tax, $this->ID, $this, $currency );
+        return apply_filters('wpinv_get_invoice_tax', $tax, $this->ID, $this, $currency);
     }
     
-    public function get_fees( $type = 'all' ) {
-        $fees    = array();
+    public function get_fees($type = 'all') {
+        $fees = array();
 
-        if ( ! empty( $this->fees ) && is_array( $this->fees ) ) {
-            foreach ( $this->fees as $fee ) {
-                if( 'all' != $type && ! empty( $fee['type'] ) && $type != $fee['type'] ) {
+        if (!empty($this->fees) && is_array($this->fees)) {
+            foreach ($this->fees as $fee) {
+                if ('all' != $type && !empty($fee['type']) && $type != $fee['type']) {
                     continue;
                 }
 
-                $fee['label'] = stripslashes( $fee['label'] );
-                $fee['amount_display'] = wpinv_price( $fee['amount'], $this->get_currency() );
-                $fees[]    = $fee;
+                $fee['label'] = stripslashes($fee['label']);
+                $fee['amount_display'] = wpinv_price($fee['amount'], $this->get_currency());
+                $fees[] = $fee;
             }
         }
 
-        return apply_filters( 'wpinv_get_invoice_fees', $fees, $this->ID, $this );
+        return apply_filters('wpinv_get_invoice_fees', $fees, $this->ID, $this);
     }
     
-    public function get_fees_total( $type = 'all' ) {
+    public function get_fees_total($type = 'all') {
         $fees_total = (float) 0.00;
 
-        $payment_fees = isset( $this->payment_meta['fees'] ) ? $this->payment_meta['fees'] : array();
-        if ( ! empty( $payment_fees ) ) {
-            foreach ( $payment_fees as $fee ) {
+        $payment_fees = isset($this->payment_meta['fees']) ? $this->payment_meta['fees'] : array();
+        if (!empty($payment_fees)) {
+            foreach ($payment_fees as $fee) {
                 $fees_total += (float) $fee['amount'];
             }
         }
 
-        return apply_filters( 'wpinv_get_invoice_fees_total', $fees_total, $this->ID, $this );
+        return apply_filters('wpinv_get_invoice_fees_total', $fees_total, $this->ID, $this);
         /*
         $fees = $this->get_fees( $type );
 
@@ -1513,116 +1513,116 @@ 
     }
 
     public function get_user_id() {
-        return apply_filters( 'wpinv_user_id', $this->user_id, $this->ID, $this );
+        return apply_filters('wpinv_user_id', $this->user_id, $this->ID, $this);
     }
     
     public function get_first_name() {
-        return apply_filters( 'wpinv_first_name', $this->first_name, $this->ID, $this );
+        return apply_filters('wpinv_first_name', $this->first_name, $this->ID, $this);
     }
     
     public function get_last_name() {
-        return apply_filters( 'wpinv_last_name', $this->last_name, $this->ID, $this );
+        return apply_filters('wpinv_last_name', $this->last_name, $this->ID, $this);
     }
     
     public function get_user_full_name() {
-        return apply_filters( 'wpinv_user_full_name', $this->full_name, $this->ID, $this );
+        return apply_filters('wpinv_user_full_name', $this->full_name, $this->ID, $this);
     }
     
     public function get_user_info() {
-        return apply_filters( 'wpinv_user_info', $this->user_info, $this->ID, $this );
+        return apply_filters('wpinv_user_info', $this->user_info, $this->ID, $this);
     }
     
     public function get_email() {
-        return apply_filters( 'wpinv_user_email', $this->email, $this->ID, $this );
+        return apply_filters('wpinv_user_email', $this->email, $this->ID, $this);
     }
     
     public function get_address() {
-        return apply_filters( 'wpinv_address', $this->address, $this->ID, $this );
+        return apply_filters('wpinv_address', $this->address, $this->ID, $this);
     }
     
     public function get_phone() {
-        return apply_filters( 'wpinv_phone', $this->phone, $this->ID, $this );
+        return apply_filters('wpinv_phone', $this->phone, $this->ID, $this);
     }
     
     public function get_number() {
-        return apply_filters( 'wpinv_number', $this->number, $this->ID, $this );
+        return apply_filters('wpinv_number', $this->number, $this->ID, $this);
     }
     
     public function get_items() {
-        return apply_filters( 'wpinv_payment_meta_items', $this->items, $this->ID, $this );
+        return apply_filters('wpinv_payment_meta_items', $this->items, $this->ID, $this);
     }
     
     public function get_key() {
-        return apply_filters( 'wpinv_key', $this->key, $this->ID, $this );
+        return apply_filters('wpinv_key', $this->key, $this->ID, $this);
     }
     
     public function get_transaction_id() {
-        return apply_filters( 'wpinv_get_invoice_transaction_id', $this->transaction_id, $this->ID, $this );
+        return apply_filters('wpinv_get_invoice_transaction_id', $this->transaction_id, $this->ID, $this);
     }
     
     public function get_gateway() {
-        return apply_filters( 'wpinv_gateway', $this->gateway, $this->ID, $this );
+        return apply_filters('wpinv_gateway', $this->gateway, $this->ID, $this);
     }
     
     public function get_gateway_title() {
-        $this->gateway_title = !empty( $this->gateway_title ) ? $this->gateway_title : wpinv_get_gateway_checkout_label( $this->gateway );
+        $this->gateway_title = !empty($this->gateway_title) ? $this->gateway_title : wpinv_get_gateway_checkout_label($this->gateway);
         
-        return apply_filters( 'wpinv_gateway_title', $this->gateway_title, $this->ID, $this );
+        return apply_filters('wpinv_gateway_title', $this->gateway_title, $this->ID, $this);
     }
     
     public function get_currency() {
-        return apply_filters( 'wpinv_currency_code', $this->currency, $this->ID, $this );
+        return apply_filters('wpinv_currency_code', $this->currency, $this->ID, $this);
     }
     
     public function get_created_date() {
-        return apply_filters( 'wpinv_created_date', $this->date, $this->ID, $this );
+        return apply_filters('wpinv_created_date', $this->date, $this->ID, $this);
     }
     
-    public function get_due_date( $display = false ) {
-        $due_date = apply_filters( 'wpinv_due_date', $this->due_date, $this->ID, $this );
+    public function get_due_date($display = false) {
+        $due_date = apply_filters('wpinv_due_date', $this->due_date, $this->ID, $this);
         
-        if ( !$display || empty( $due_date ) ) {
+        if (!$display || empty($due_date)) {
             return $due_date;
         }
         
-        return date_i18n( get_option( 'date_format' ), strtotime( $due_date ) );
+        return date_i18n(get_option('date_format'), strtotime($due_date));
     }
     
     public function get_completed_date() {
-        return apply_filters( 'wpinv_completed_date', $this->completed_date, $this->ID, $this );
+        return apply_filters('wpinv_completed_date', $this->completed_date, $this->ID, $this);
     }
     
-    public function get_invoice_date( $formatted = true ) {
+    public function get_invoice_date($formatted = true) {
         $date_completed = $this->completed_date;
         $invoice_date   = $date_completed != '' && $date_completed != '0000-00-00 00:00:00' ? $date_completed : '';
         
-        if ( $invoice_date == '' ) {
+        if ($invoice_date == '') {
             $date_created   = $this->date;
             $invoice_date   = $date_created != '' && $date_created != '0000-00-00 00:00:00' ? $date_created : '';
         }
         
-        if ( $formatted && $invoice_date ) {
-            $invoice_date   = date_i18n( get_option( 'date_format' ), strtotime( $invoice_date ) );
+        if ($formatted && $invoice_date) {
+            $invoice_date = date_i18n(get_option('date_format'), strtotime($invoice_date));
         }
 
-        return apply_filters( 'wpinv_get_invoice_date', $invoice_date, $formatted, $this->ID, $this );
+        return apply_filters('wpinv_get_invoice_date', $invoice_date, $formatted, $this->ID, $this);
     }
     
     public function get_ip() {
-        return apply_filters( 'wpinv_user_ip', $this->ip, $this->ID, $this );
+        return apply_filters('wpinv_user_ip', $this->ip, $this->ID, $this);
     }
         
-    public function has_status( $status ) {
-        return apply_filters( 'wpinv_has_status', ( is_array( $status ) && in_array( $this->get_status(), $status ) ) || $this->get_status() === $status ? true : false, $this, $status );
+    public function has_status($status) {
+        return apply_filters('wpinv_has_status', (is_array($status) && in_array($this->get_status(), $status)) || $this->get_status() === $status ? true : false, $this, $status);
     }
     
-    public function add_item( $item_id = 0, $args = array() ) {
+    public function add_item($item_id = 0, $args = array()) {
         global $wpi_current_id, $wpi_item_id;
         
-        $item = new WPInv_Item( $item_id );
+        $item = new WPInv_Item($item_id);
 
         // Bail if this post isn't a item
-        if( !$item || $item->post_type !== 'wpi_item' ) {
+        if (!$item || $item->post_type !== 'wpi_item') {
             return false;
         }
         
@@ -1641,8 +1641,8 @@ 
             'fees'          => array()
         );
 
-        $args = wp_parse_args( apply_filters( 'wpinv_add_item_args', $args, $item->ID ), $defaults );
-        $args['quantity']   = $has_quantities && $args['quantity'] > 0 ? absint( $args['quantity'] ) : 1;
+        $args = wp_parse_args(apply_filters('wpinv_add_item_args', $args, $item->ID), $defaults);
+        $args['quantity'] = $has_quantities && $args['quantity'] > 0 ? absint($args['quantity']) : 1;
 
         $wpi_current_id         = $this->ID;
         $wpi_item_id            = $item->ID;
@@ -1654,19 +1654,19 @@ 
         $found_cart_key         = false;
         
         if ($has_quantities) {
-            $this->cart_details = !empty( $this->cart_details ) ? array_values( $this->cart_details ) : $this->cart_details;
+            $this->cart_details = !empty($this->cart_details) ? array_values($this->cart_details) : $this->cart_details;
             
-            foreach ( $this->items as $key => $cart_item ) {
-                if ( (int)$item_id !== (int)$cart_item['id'] ) {
+            foreach ($this->items as $key => $cart_item) {
+                if ((int) $item_id !== (int) $cart_item['id']) {
                     continue;
                 }
 
-                $this->items[ $key ]['quantity'] += $args['quantity'];
+                $this->items[$key]['quantity'] += $args['quantity'];
                 break;
             }
             
-            foreach ( $this->cart_details as $cart_key => $cart_item ) {
-                if ( $item_id != $cart_item['id'] ) {
+            foreach ($this->cart_details as $cart_key => $cart_item) {
+                if ($item_id != $cart_item['id']) {
                     continue;
                 }
 
@@ -1678,29 +1678,29 @@ 
         if ($has_quantities && $found_cart_key !== false) {
             $cart_item          = $this->cart_details[$found_cart_key];
             $item_price         = $cart_item['item_price'];
-            $quantity           = !empty( $cart_item['quantity'] ) ? $cart_item['quantity'] : 1;
-            $tax_rate           = !empty( $cart_item['vat_rate'] ) ? $cart_item['vat_rate'] : 0;
+            $quantity           = !empty($cart_item['quantity']) ? $cart_item['quantity'] : 1;
+            $tax_rate           = !empty($cart_item['vat_rate']) ? $cart_item['vat_rate'] : 0;
             
             $new_quantity       = $quantity + $args['quantity'];
             $subtotal           = $item_price * $new_quantity;
             
             $args['quantity']   = $new_quantity;
-            $discount           = !empty( $args['discount'] ) ? $args['discount'] : 0;
-            $tax                = $subtotal > 0 && $tax_rate > 0 ? ( ( $subtotal - $discount ) * 0.01 * (float)$tax_rate ) : 0;
+            $discount           = !empty($args['discount']) ? $args['discount'] : 0;
+            $tax                = $subtotal > 0 && $tax_rate > 0 ? (($subtotal - $discount) * 0.01 * (float) $tax_rate) : 0;
             
-            $discount_increased = $discount > 0 && $subtotal > 0 && $discount > (float)$cart_item['discount'] ? $discount - (float)$cart_item['discount'] : 0;
-            $tax_increased      = $tax > 0 && $subtotal > 0 && $tax > (float)$cart_item['tax'] ? $tax - (float)$cart_item['tax'] : 0;
+            $discount_increased = $discount > 0 && $subtotal > 0 && $discount > (float) $cart_item['discount'] ? $discount - (float) $cart_item['discount'] : 0;
+            $tax_increased      = $tax > 0 && $subtotal > 0 && $tax > (float) $cart_item['tax'] ? $tax - (float) $cart_item['tax'] : 0;
             // The total increase equals the number removed * the item_price
-            $total_increased    = wpinv_round_amount( $item_price );
+            $total_increased    = wpinv_round_amount($item_price);
             
-            if ( wpinv_prices_include_tax() ) {
-                $subtotal -= wpinv_round_amount( $tax );
+            if (wpinv_prices_include_tax()) {
+                $subtotal -= wpinv_round_amount($tax);
             }
 
-            $total              = $subtotal - $discount + $tax;
+            $total = $subtotal - $discount + $tax;
 
             // Do not allow totals to go negative
-            if( $total < 0 ) {
+            if ($total < 0) {
                 $total = 0;
             }
             
@@ -1716,25 +1716,25 @@ 
             $this->cart_details[$found_cart_key] = $cart_item;
         } else {
             // Set custom price.
-            if ( $args['custom_price'] !== '' ) {
+            if ($args['custom_price'] !== '') {
                 $item_price = $args['custom_price'];
             } else {
                 // Allow overriding the price
-                if ( false !== $args['item_price'] ) {
+                if (false !== $args['item_price']) {
                     $item_price = $args['item_price'];
                 } else {
-                    $item_price = wpinv_get_item_price( $item->ID );
+                    $item_price = wpinv_get_item_price($item->ID);
                 }
             }
 
             // Sanitizing the price here so we don't have a dozen calls later
-            $item_price = wpinv_sanitize_amount( $item_price );
-            $subtotal   = wpinv_round_amount( $item_price * $args['quantity'] );
+            $item_price = wpinv_sanitize_amount($item_price);
+            $subtotal   = wpinv_round_amount($item_price * $args['quantity']);
         
-            $discount   = !empty( $args['discount'] ) ? $args['discount'] : 0;
-            $tax_class  = !empty( $args['vat_class'] ) ? $args['vat_class'] : '';
-            $tax_rate   = !empty( $args['vat_rate'] ) ? $args['vat_rate'] : 0;
-            $tax        = $subtotal > 0 && $tax_rate > 0 ? ( ( $subtotal - $discount ) * 0.01 * (float)$tax_rate ) : 0;
+            $discount   = !empty($args['discount']) ? $args['discount'] : 0;
+            $tax_class  = !empty($args['vat_class']) ? $args['vat_class'] : '';
+            $tax_rate   = !empty($args['vat_rate']) ? $args['vat_rate'] : 0;
+            $tax        = $subtotal > 0 && $tax_rate > 0 ? (($subtotal - $discount) * 0.01 * (float) $tax_rate) : 0;
 
             // Setup the items meta item
             $new_item = array(
@@ -1742,29 +1742,29 @@ 
                 'quantity' => $args['quantity'],
             );
 
-            $this->items[]  = $new_item;
+            $this->items[] = $new_item;
 
-            if ( wpinv_prices_include_tax() ) {
-                $subtotal -= wpinv_round_amount( $tax );
+            if (wpinv_prices_include_tax()) {
+                $subtotal -= wpinv_round_amount($tax);
             }
 
-            $total      = $subtotal - $discount + $tax;
+            $total = $subtotal - $discount + $tax;
 
             // Do not allow totals to go negative
-            if( $total < 0 ) {
+            if ($total < 0) {
                 $total = 0;
             }
         
             $this->cart_details[] = array(
                 'name'          => !empty($args['name']) ? $args['name'] : $item->get_name(),
                 'id'            => $item->ID,
-                'item_price'    => wpinv_round_amount( $item_price ),
-                'custom_price'  => ( $args['custom_price'] !== '' ? wpinv_round_amount( $args['custom_price'] ) : '' ),
+                'item_price'    => wpinv_round_amount($item_price),
+                'custom_price'  => ($args['custom_price'] !== '' ? wpinv_round_amount($args['custom_price']) : ''),
                 'quantity'      => $args['quantity'],
                 'discount'      => $discount,
-                'subtotal'      => wpinv_round_amount( $subtotal ),
-                'tax'           => wpinv_round_amount( $tax ),
-                'price'         => wpinv_round_amount( $total ),
+                'subtotal'      => wpinv_round_amount($subtotal),
+                'tax'           => wpinv_round_amount($tax),
+                'price'         => wpinv_round_amount($total),
                 'vat_rate'      => $tax_rate,
                 'vat_class'     => $tax_class,
                 'meta'          => $args['meta'],
@@ -1774,18 +1774,18 @@ 
             $subtotal = $subtotal - $discount;
         }
         
-        $added_item = end( $this->cart_details );
-        $added_item['action']  = 'add';
+        $added_item = end($this->cart_details);
+        $added_item['action'] = 'add';
         
         $this->pending['items'][] = $added_item;
         
-        $this->increase_subtotal( $subtotal );
-        $this->increase_tax( $tax );
+        $this->increase_subtotal($subtotal);
+        $this->increase_tax($tax);
 
         return true;
     }
     
-    public function remove_item( $item_id, $args = array() ) {
+    public function remove_item($item_id, $args = array()) {
         // Set some defaults
         $defaults = array(
             'quantity'      => 1,
@@ -1793,51 +1793,51 @@ 
             'custom_price'  => '',
             'cart_index'    => false,
         );
-        $args = wp_parse_args( $args, $defaults );
+        $args = wp_parse_args($args, $defaults);
 
         // Bail if this post isn't a item
-        if ( get_post_type( $item_id ) !== 'wpi_item' ) {
+        if (get_post_type($item_id) !== 'wpi_item') {
             return false;
         }
         
-        $this->cart_details = !empty( $this->cart_details ) ? array_values( $this->cart_details ) : $this->cart_details;
+        $this->cart_details = !empty($this->cart_details) ? array_values($this->cart_details) : $this->cart_details;
 
-        foreach ( $this->items as $key => $item ) {
-            if ( !empty($item['id']) && (int)$item_id !== (int)$item['id'] ) {
+        foreach ($this->items as $key => $item) {
+            if (!empty($item['id']) && (int) $item_id !== (int) $item['id']) {
                 continue;
             }
 
-            if ( false !== $args['cart_index'] ) {
-                $cart_index = absint( $args['cart_index'] );
-                $cart_item  = ! empty( $this->cart_details[ $cart_index ] ) ? $this->cart_details[ $cart_index ] : false;
+            if (false !== $args['cart_index']) {
+                $cart_index = absint($args['cart_index']);
+                $cart_item  = !empty($this->cart_details[$cart_index]) ? $this->cart_details[$cart_index] : false;
 
-                if ( ! empty( $cart_item ) ) {
+                if (!empty($cart_item)) {
                     // If the cart index item isn't the same item ID, don't remove it
-                    if ( !empty($cart_item['id']) && $cart_item['id'] != $item['id'] ) {
+                    if (!empty($cart_item['id']) && $cart_item['id'] != $item['id']) {
                         continue;
                     }
                 }
             }
 
-            $item_quantity = $this->items[ $key ]['quantity'];
-            if ( $item_quantity > $args['quantity'] ) {
-                $this->items[ $key ]['quantity'] -= $args['quantity'];
+            $item_quantity = $this->items[$key]['quantity'];
+            if ($item_quantity > $args['quantity']) {
+                $this->items[$key]['quantity'] -= $args['quantity'];
                 break;
             } else {
-                unset( $this->items[ $key ] );
+                unset($this->items[$key]);
                 break;
             }
         }
 
         $found_cart_key = false;
-        if ( false === $args['cart_index'] ) {
-            foreach ( $this->cart_details as $cart_key => $item ) {
-                if ( $item_id != $item['id'] ) {
+        if (false === $args['cart_index']) {
+            foreach ($this->cart_details as $cart_key => $item) {
+                if ($item_id != $item['id']) {
                     continue;
                 }
 
-                if ( false !== $args['item_price'] ) {
-                    if ( isset( $item['item_price'] ) && (float) $args['item_price'] != (float) $item['item_price'] ) {
+                if (false !== $args['item_price']) {
+                    if (isset($item['item_price']) && (float) $args['item_price'] != (float) $item['item_price']) {
                         continue;
                     }
                 }
@@ -1846,13 +1846,13 @@ 
                 break;
             }
         } else {
-            $cart_index = absint( $args['cart_index'] );
+            $cart_index = absint($args['cart_index']);
 
-            if ( ! array_key_exists( $cart_index, $this->cart_details ) ) {
+            if (!array_key_exists($cart_index, $this->cart_details)) {
                 return false; // Invalid cart index passed.
             }
 
-            if ( (int) $this->cart_details[ $cart_index ]['id'] > 0 && (int) $this->cart_details[ $cart_index ]['id'] !== (int) $item_id ) {
+            if ((int) $this->cart_details[$cart_index]['id'] > 0 && (int) $this->cart_details[$cart_index]['id'] !== (int) $item_id) {
                 return false; // We still need the proper Item ID to be sure.
             }
 
@@ -1860,41 +1860,41 @@ 
         }
         
         $cart_item  = $this->cart_details[$found_cart_key];
-        $quantity   = !empty( $cart_item['quantity'] ) ? $cart_item['quantity'] : 1;
+        $quantity   = !empty($cart_item['quantity']) ? $cart_item['quantity'] : 1;
         
-        if ( count( $this->cart_details ) == 1 && ( $quantity - $args['quantity'] ) < 1 ) {
+        if (count($this->cart_details) == 1 && ($quantity - $args['quantity']) < 1) {
             //return false; // Invoice must contain at least one item.
         }
         
-        $discounts  = $this->get_discounts();
+        $discounts = $this->get_discounts();
         
-        if ( $quantity > $args['quantity'] ) {
+        if ($quantity > $args['quantity']) {
             $item_price         = $cart_item['item_price'];
-            $tax_rate           = !empty( $cart_item['vat_rate'] ) ? $cart_item['vat_rate'] : 0;
+            $tax_rate           = !empty($cart_item['vat_rate']) ? $cart_item['vat_rate'] : 0;
             
-            $new_quantity       = max( $quantity - $args['quantity'], 1);
+            $new_quantity       = max($quantity - $args['quantity'], 1);
             $subtotal           = $item_price * $new_quantity;
             
             $args['quantity']   = $new_quantity;
-            $discount           = !empty( $cart_item['discount'] ) ? $cart_item['discount'] : 0;
-            $tax                = $subtotal > 0 && $tax_rate > 0 ? ( ( $subtotal - $discount ) * 0.01 * (float)$tax_rate ) : 0;
+            $discount           = !empty($cart_item['discount']) ? $cart_item['discount'] : 0;
+            $tax                = $subtotal > 0 && $tax_rate > 0 ? (($subtotal - $discount) * 0.01 * (float) $tax_rate) : 0;
             
-            $discount_decrease  = (float)$cart_item['discount'] > 0 && $quantity > 0 ? wpinv_round_amount( ( (float)$cart_item['discount'] / $quantity ) ) : 0;
-            $discount_decrease  = $discount > 0 && $subtotal > 0 && (float)$cart_item['discount'] > $discount ? (float)$cart_item['discount'] - $discount : $discount_decrease; 
-            $tax_decrease       = (float)$cart_item['tax'] > 0 && $quantity > 0 ? wpinv_round_amount( ( (float)$cart_item['tax'] / $quantity ) ) : 0;
-            $tax_decrease       = $tax > 0 && $subtotal > 0 && (float)$cart_item['tax'] > $tax ? (float)$cart_item['tax'] - $tax : $tax_decrease;
+            $discount_decrease  = (float) $cart_item['discount'] > 0 && $quantity > 0 ? wpinv_round_amount(((float) $cart_item['discount'] / $quantity)) : 0;
+            $discount_decrease  = $discount > 0 && $subtotal > 0 && (float) $cart_item['discount'] > $discount ? (float) $cart_item['discount'] - $discount : $discount_decrease; 
+            $tax_decrease       = (float) $cart_item['tax'] > 0 && $quantity > 0 ? wpinv_round_amount(((float) $cart_item['tax'] / $quantity)) : 0;
+            $tax_decrease       = $tax > 0 && $subtotal > 0 && (float) $cart_item['tax'] > $tax ? (float) $cart_item['tax'] - $tax : $tax_decrease;
             
             // The total increase equals the number removed * the item_price
-            $total_decrease     = wpinv_round_amount( $item_price );
+            $total_decrease     = wpinv_round_amount($item_price);
             
-            if ( wpinv_prices_include_tax() ) {
-                $subtotal -= wpinv_round_amount( $tax );
+            if (wpinv_prices_include_tax()) {
+                $subtotal -= wpinv_round_amount($tax);
             }
 
-            $total              = $subtotal - $discount + $tax;
+            $total = $subtotal - $discount + $tax;
 
             // Do not allow totals to go negative
-            if( $total < 0 ) {
+            if ($total < 0) {
                 $total = 0;
             }
             
@@ -1913,16 +1913,16 @@ 
             
             $this->cart_details[$found_cart_key] = $cart_item;
             
-            $remove_item = end( $this->cart_details );
+            $remove_item = end($this->cart_details);
         } else {
             $item_price     = $cart_item['item_price'];
-            $discount       = !empty( $cart_item['discount'] ) ? $cart_item['discount'] : 0;
-            $tax            = !empty( $cart_item['tax'] ) ? $cart_item['tax'] : 0;
+            $discount       = !empty($cart_item['discount']) ? $cart_item['discount'] : 0;
+            $tax            = !empty($cart_item['tax']) ? $cart_item['tax'] : 0;
         
-            $subtotal_decrease  = ( $item_price * $quantity ) - $discount;
+            $subtotal_decrease  = ($item_price * $quantity) - $discount;
             $tax_decrease       = $tax;
 
-            unset( $this->cart_details[$found_cart_key] );
+            unset($this->cart_details[$found_cart_key]);
             
             $remove_item             = $args;
             $remove_item['id']       = $item_id;
@@ -1933,8 +1933,8 @@ 
         $remove_item['action']      = 'remove';
         $this->pending['items'][]   = $remove_item;
                
-        $this->decrease_subtotal( $subtotal_decrease );
-        $this->decrease_tax( $tax_decrease );
+        $this->decrease_subtotal($subtotal_decrease);
+        $this->decrease_tax($tax_decrease);
         
         return true;
     }
@@ -1942,7 +1942,7 @@ 
     public function update_items($temp = false) {
         global $wpinv_euvat, $wpi_current_id, $wpi_item_id, $wpi_nosave;
         
-        if ( !empty( $this->cart_details ) ) {
+        if (!empty($this->cart_details)) {
             $wpi_nosave             = $temp;
             $cart_subtotal          = 0;
             $cart_discount          = 0;
@@ -1952,61 +1952,61 @@ 
             $_POST['wpinv_country'] = $this->country;
             $_POST['wpinv_state']   = $this->state;
             
-            foreach ( $this->cart_details as $key => $item ) {
+            foreach ($this->cart_details as $key => $item) {
                 $item_price = $item['item_price'];
-                $quantity   = wpinv_item_quantities_enabled() && $item['quantity'] > 0 ? absint( $item['quantity'] ) : 1;
-                $amount     = wpinv_round_amount( $item_price * $quantity );
+                $quantity   = wpinv_item_quantities_enabled() && $item['quantity'] > 0 ? absint($item['quantity']) : 1;
+                $amount     = wpinv_round_amount($item_price * $quantity);
                 $subtotal   = $item_price * $quantity;
                 
                 $wpi_current_id         = $this->ID;
                 $wpi_item_id            = $item['id'];
                 
-                $discount   = wpinv_get_cart_item_discount_amount( $item, $this->get_discounts() );
+                $discount   = wpinv_get_cart_item_discount_amount($item, $this->get_discounts());
                 
-                $tax_rate   = wpinv_get_tax_rate( $this->country, $this->state, $wpi_item_id );
-                $tax_class  = $wpinv_euvat->get_item_class( $wpi_item_id );
-                $tax        = $item_price > 0 ? ( ( $subtotal - $discount ) * 0.01 * (float)$tax_rate ) : 0;
+                $tax_rate   = wpinv_get_tax_rate($this->country, $this->state, $wpi_item_id);
+                $tax_class  = $wpinv_euvat->get_item_class($wpi_item_id);
+                $tax        = $item_price > 0 ? (($subtotal - $discount) * 0.01 * (float) $tax_rate) : 0;
 
-                if ( wpinv_prices_include_tax() ) {
-                    $subtotal -= wpinv_round_amount( $tax );
+                if (wpinv_prices_include_tax()) {
+                    $subtotal -= wpinv_round_amount($tax);
                 }
 
-                $total      = $subtotal - $discount + $tax;
+                $total = $subtotal - $discount + $tax;
 
                 // Do not allow totals to go negative
-                if( $total < 0 ) {
+                if ($total < 0) {
                     $total = 0;
                 }
 
                 $cart_details[] = array(
                     'id'          => $item['id'],
                     'name'        => $item['name'],
-                    'item_price'  => wpinv_round_amount( $item_price ),
-                    'custom_price'=> ( isset( $item['custom_price'] ) ? $item['custom_price'] : '' ),
+                    'item_price'  => wpinv_round_amount($item_price),
+                    'custom_price'=> (isset($item['custom_price']) ? $item['custom_price'] : ''),
                     'quantity'    => $quantity,
                     'discount'    => $discount,
-                    'subtotal'    => wpinv_round_amount( $subtotal ),
-                    'tax'         => wpinv_round_amount( $tax ),
-                    'price'       => wpinv_round_amount( $total ),
+                    'subtotal'    => wpinv_round_amount($subtotal),
+                    'tax'         => wpinv_round_amount($tax),
+                    'price'       => wpinv_round_amount($total),
                     'vat_rate'    => $tax_rate,
                     'vat_class'   => $tax_class,
                     'meta'        => isset($item['meta']) ? $item['meta'] : array(),
                     'fees'        => isset($item['fees']) ? $item['fees'] : array(),
                 );
                 
-                $cart_subtotal  += (float)($subtotal - $discount); // TODO
-                $cart_discount  += (float)($discount);
-                $cart_tax       += (float)($tax);
+                $cart_subtotal  += (float) ($subtotal - $discount); // TODO
+                $cart_discount  += (float) ($discount);
+                $cart_tax       += (float) ($tax);
             }
-            if ( $cart_subtotal < 0 ) {
+            if ($cart_subtotal < 0) {
                 $cart_subtotal = 0;
             }
-            if ( $cart_tax < 0 ) {
+            if ($cart_tax < 0) {
                 $cart_tax = 0;
             }
-            $this->subtotal = wpinv_round_amount( $cart_subtotal );
-            $this->tax      = wpinv_round_amount( $cart_tax );
-            $this->discount = wpinv_round_amount( $cart_discount );
+            $this->subtotal = wpinv_round_amount($cart_subtotal);
+            $this->tax      = wpinv_round_amount($cart_tax);
+            $this->discount = wpinv_round_amount($cart_discount);
             
             $this->recalculate_total();
             
@@ -2018,177 +2018,177 @@ 
     
     public function recalculate_totals($temp = false) {        
         $this->update_items($temp);
-        $this->save( true );
+        $this->save(true);
         
         return $this;
     }
     
     public function needs_payment() {
-        $valid_invoice_statuses = apply_filters( 'wpinv_valid_invoice_statuses_for_payment', array( 'wpi-pending' ), $this );
+        $valid_invoice_statuses = apply_filters('wpinv_valid_invoice_statuses_for_payment', array('wpi-pending'), $this);
 
-        if ( $this->has_status( $valid_invoice_statuses ) && ( $this->get_total() > 0 || $this->is_free_trial() || $this->is_free() || $this->is_initial_free() ) ) {
+        if ($this->has_status($valid_invoice_statuses) && ($this->get_total() > 0 || $this->is_free_trial() || $this->is_free() || $this->is_initial_free())) {
             $needs_payment = true;
         } else {
             $needs_payment = false;
         }
 
-        return apply_filters( 'wpinv_needs_payment', $needs_payment, $this, $valid_invoice_statuses );
+        return apply_filters('wpinv_needs_payment', $needs_payment, $this, $valid_invoice_statuses);
     }
     
-    public function get_checkout_payment_url( $with_key = false, $secret = false ) {
+    public function get_checkout_payment_url($with_key = false, $secret = false) {
         $pay_url = wpinv_get_checkout_uri();
 
-        if ( is_ssl() ) {
-            $pay_url = str_replace( 'http:', 'https:', $pay_url );
+        if (is_ssl()) {
+            $pay_url = str_replace('http:', 'https:', $pay_url);
         }
         
         $key = $this->get_key();
 
-        if ( $with_key ) {
-            $pay_url = add_query_arg( 'invoice_key', $key, $pay_url );
+        if ($with_key) {
+            $pay_url = add_query_arg('invoice_key', $key, $pay_url);
         } else {
-            $pay_url = add_query_arg( array( 'wpi_action' => 'pay_for_invoice', 'invoice_key' => $key ), $pay_url );
+            $pay_url = add_query_arg(array('wpi_action' => 'pay_for_invoice', 'invoice_key' => $key), $pay_url);
         }
         
-        if ( $secret ) {
-            $pay_url = add_query_arg( array( '_wpipay' => md5( $this->get_user_id() . '::' . $this->get_email() . '::' . $key ) ), $pay_url );
+        if ($secret) {
+            $pay_url = add_query_arg(array('_wpipay' => md5($this->get_user_id() . '::' . $this->get_email() . '::' . $key)), $pay_url);
         }
 
-        return apply_filters( 'wpinv_get_checkout_payment_url', $pay_url, $this, $with_key, $secret );
+        return apply_filters('wpinv_get_checkout_payment_url', $pay_url, $this, $with_key, $secret);
     }
     
-    public function get_view_url( $with_key = false ) {
-        $invoice_url = get_permalink( $this->ID );
+    public function get_view_url($with_key = false) {
+        $invoice_url = get_permalink($this->ID);
 
-        if ( $with_key ) {
-            $invoice_url = add_query_arg( 'invoice_key', $this->get_key(), $invoice_url );
+        if ($with_key) {
+            $invoice_url = add_query_arg('invoice_key', $this->get_key(), $invoice_url);
         }
 
-        return apply_filters( 'wpinv_get_view_url', $invoice_url, $this, $with_key );
+        return apply_filters('wpinv_get_view_url', $invoice_url, $this, $with_key);
     }
     
-    public function generate_key( $string = '' ) {
-        $auth_key  = defined( 'AUTH_KEY' ) ? AUTH_KEY : '';
-        return strtolower( md5( $string . date( 'Y-m-d H:i:s' ) . $auth_key . uniqid( 'wpinv', true ) ) );  // Unique key
+    public function generate_key($string = '') {
+        $auth_key = defined('AUTH_KEY') ? AUTH_KEY : '';
+        return strtolower(md5($string . date('Y-m-d H:i:s') . $auth_key . uniqid('wpinv', true))); // Unique key
     }
     
     public function is_recurring() {
-        if ( empty( $this->cart_details ) ) {
+        if (empty($this->cart_details)) {
             return false;
         }
         
         $has_subscription = false;
-        foreach( $this->cart_details as $cart_item ) {
-            if ( !empty( $cart_item['id'] ) && wpinv_is_recurring_item( $cart_item['id'] )  ) {
+        foreach ($this->cart_details as $cart_item) {
+            if (!empty($cart_item['id']) && wpinv_is_recurring_item($cart_item['id'])) {
                 $has_subscription = true;
                 break;
             }
         }
         
-        if ( count( $this->cart_details ) > 1 ) {
+        if (count($this->cart_details) > 1) {
             $has_subscription = false;
         }
 
-        return apply_filters( 'wpinv_invoice_has_recurring_item', $has_subscription, $this->cart_details );
+        return apply_filters('wpinv_invoice_has_recurring_item', $has_subscription, $this->cart_details);
     }
     
     public function is_free_trial() {
         $is_free_trial = false;
         
-        if ( $this->is_parent() && $item = $this->get_recurring( true ) ) {
-            if ( !empty( $item ) && $item->has_free_trial() ) {
+        if ($this->is_parent() && $item = $this->get_recurring(true)) {
+            if (!empty($item) && $item->has_free_trial()) {
                 $is_free_trial = true;
             }
         }
 
-        return apply_filters( 'wpinv_invoice_is_free_trial', $is_free_trial, $this->cart_details );
+        return apply_filters('wpinv_invoice_is_free_trial', $is_free_trial, $this->cart_details);
     }
     
     public function is_initial_free() {
         $is_initial_free = false;
         
-        if ( ! ( (float)wpinv_round_amount( $this->get_total() ) > 0 ) && $this->is_parent() && $this->is_recurring() && ! $this->is_free_trial() && ! $this->is_free() ) {
+        if (!((float) wpinv_round_amount($this->get_total()) > 0) && $this->is_parent() && $this->is_recurring() && !$this->is_free_trial() && !$this->is_free()) {
             $is_initial_free = true;
         }
 
-        return apply_filters( 'wpinv_invoice_is_initial_free', $is_initial_free, $this->cart_details );
+        return apply_filters('wpinv_invoice_is_initial_free', $is_initial_free, $this->cart_details);
     }
     
-    public function get_recurring( $object = false ) {
+    public function get_recurring($object = false) {
         $item = NULL;
         
-        if ( empty( $this->cart_details ) ) {
+        if (empty($this->cart_details)) {
             return $item;
         }
         
-        foreach( $this->cart_details as $cart_item ) {
-            if ( !empty( $cart_item['id'] ) && wpinv_is_recurring_item( $cart_item['id'] )  ) {
+        foreach ($this->cart_details as $cart_item) {
+            if (!empty($cart_item['id']) && wpinv_is_recurring_item($cart_item['id'])) {
                 $item = $cart_item['id'];
                 break;
             }
         }
         
-        if ( $object ) {
-            $item = $item ? new WPInv_Item( $item ) : NULL;
+        if ($object) {
+            $item = $item ? new WPInv_Item($item) : NULL;
             
-            apply_filters( 'wpinv_invoice_get_recurring_item', $item, $this );
+            apply_filters('wpinv_invoice_get_recurring_item', $item, $this);
         }
 
-        return apply_filters( 'wpinv_invoice_get_recurring_item_id', $item, $this );
+        return apply_filters('wpinv_invoice_get_recurring_item_id', $item, $this);
     }
     
     public function get_subscription_name() {
-        $item = $this->get_recurring( true );
+        $item = $this->get_recurring(true);
         
-        if ( empty( $item ) ) {
+        if (empty($item)) {
             return NULL;
         }
         
-        if ( !($name = $item->get_name()) ) {
+        if (!($name = $item->get_name())) {
             $name = $item->post_name;
         }
 
-        return apply_filters( 'wpinv_invoice_get_subscription_name', $name, $this );
+        return apply_filters('wpinv_invoice_get_subscription_name', $name, $this);
     }
     
     public function get_subscription_id() {
-        $subscription_id = $this->get_meta( '_wpinv_subscr_profile_id', true );
+        $subscription_id = $this->get_meta('_wpinv_subscr_profile_id', true);
         
-        if ( empty( $subscription_id ) && !empty( $this->parent_invoice ) ) {
-            $parent_invoice = wpinv_get_invoice( $this->parent_invoice );
+        if (empty($subscription_id) && !empty($this->parent_invoice)) {
+            $parent_invoice = wpinv_get_invoice($this->parent_invoice);
             
-            $subscription_id = $parent_invoice->get_meta( '_wpinv_subscr_profile_id', true );
+            $subscription_id = $parent_invoice->get_meta('_wpinv_subscr_profile_id', true);
         }
         
         return $subscription_id;
     }
     
     public function is_parent() {
-        $is_parent = empty( $this->parent_invoice ) ? true : false;
+        $is_parent = empty($this->parent_invoice) ? true : false;
 
-        return apply_filters( 'wpinv_invoice_is_parent', $is_parent, $this );
+        return apply_filters('wpinv_invoice_is_parent', $is_parent, $this);
     }
     
     public function is_renewal() {
         $is_renewal = $this->parent_invoice && $this->parent_invoice != $this->ID ? true : false;
 
-        return apply_filters( 'wpinv_invoice_is_renewal', $is_renewal, $this );
+        return apply_filters('wpinv_invoice_is_renewal', $is_renewal, $this);
     }
     
     public function get_parent_payment() {
         $parent_payment = NULL;
         
-        if ( $this->is_renewal() ) {
-            $parent_payment = wpinv_get_invoice( $this->parent_invoice );
+        if ($this->is_renewal()) {
+            $parent_payment = wpinv_get_invoice($this->parent_invoice);
         }
         
         return $parent_payment;
     }
     
     public function is_paid() {
-        $is_paid = $this->has_status( array( 'publish', 'wpi-processing', 'wpi-renewal' ) );
+        $is_paid = $this->has_status(array('publish', 'wpi-processing', 'wpi-renewal'));
 
-        return apply_filters( 'wpinv_invoice_is_paid', $is_paid, $this );
+        return apply_filters('wpinv_invoice_is_paid', $is_paid, $this);
     }
 
     /**
@@ -2201,23 +2201,23 @@ 
     }
     
     public function is_refunded() {
-        $is_refunded = $this->has_status( array( 'wpi-refunded' ) );
+        $is_refunded = $this->has_status(array('wpi-refunded'));
 
-        return apply_filters( 'wpinv_invoice_is_refunded', $is_refunded, $this );
+        return apply_filters('wpinv_invoice_is_refunded', $is_refunded, $this);
     }
     
     public function is_free() {
         $is_free = false;
         
-        if ( !( (float)wpinv_round_amount( $this->get_total() ) > 0 ) ) {
-            if ( $this->is_parent() && $this->is_recurring() ) {
-                $is_free = ( $this->has_non_recurring_discount() || (float)wpinv_round_amount( $this->get_recurring_details( 'total' ) ) ) > 0 ? false : true;
+        if (!((float) wpinv_round_amount($this->get_total()) > 0)) {
+            if ($this->is_parent() && $this->is_recurring()) {
+                $is_free = ($this->has_non_recurring_discount() || (float) wpinv_round_amount($this->get_recurring_details('total'))) > 0 ? false : true;
             } else {
                 $is_free = true;
             }
         }
         
-        return apply_filters( 'wpinv_invoice_is_free', $is_free, $this );
+        return apply_filters('wpinv_invoice_is_free', $is_free, $this);
     }
     
     public function has_vat() {
@@ -2225,41 +2225,41 @@ 
         
         $requires_vat = false;
         
-        if ( $this->country ) {
+        if ($this->country) {
             $wpi_country        = $this->country;
             
-            $requires_vat       = $wpinv_euvat->requires_vat( $requires_vat, $this->get_user_id(), $wpinv_euvat->invoice_has_digital_rule( $this ) );
+            $requires_vat       = $wpinv_euvat->requires_vat($requires_vat, $this->get_user_id(), $wpinv_euvat->invoice_has_digital_rule($this));
         }
         
-        return apply_filters( 'wpinv_invoice_has_vat', $requires_vat, $this );
+        return apply_filters('wpinv_invoice_has_vat', $requires_vat, $this);
     }
     
     public function refresh_item_ids() {
         $item_ids = array();
         
-        if ( !empty( $this->cart_details ) ) {
-            foreach ( $this->cart_details as $key => $item ) {
-                if ( !empty( $item['id'] ) ) {
+        if (!empty($this->cart_details)) {
+            foreach ($this->cart_details as $key => $item) {
+                if (!empty($item['id'])) {
                     $item_ids[] = $item['id'];
                 }
             }
         }
         
-        $item_ids = !empty( $item_ids ) ? implode( ',', array_unique( $item_ids ) ) : '';
+        $item_ids = !empty($item_ids) ? implode(',', array_unique($item_ids)) : '';
         
-        update_post_meta( $this->ID, '_wpinv_item_ids', $item_ids );
+        update_post_meta($this->ID, '_wpinv_item_ids', $item_ids);
     }
     
-    public function get_invoice_quote_type( $post_id ) {
-        if ( empty( $post_id ) ) {
+    public function get_invoice_quote_type($post_id) {
+        if (empty($post_id)) {
             return '';
         }
 
-        $type = get_post_type( $post_id );
+        $type = get_post_type($post_id);
 
-        if ( 'wpi_invoice' === $type ) {
+        if ('wpi_invoice' === $type) {
             $post_type = __('Invoice', 'invoicing');
-        } else{
+        } else {
             $post_type = __('Quote', 'invoicing');
         }