AyeCode / invoicing

includes/class-wpinv-discount.php

Indentation +674 added lines, -674 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_string( $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_string( $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 ( 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 );
-
-	}
+        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 {
+            $value = null;
+        }
+
+        /**
+         * Filters a discount's property value.
+         * 
+         * The dynamic part ($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 ) {
-
-		$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 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;
+    }
 	
-	/**
-	 * 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 ) ) {
@@ -682,168 +682,168 @@ 
             $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' ) {
             $discount = $this->amount;
-		} else {
+        } else {
             $discount = ( $amount * ( $this->amount / 100 ) );
-		}
+        }
 
-		if ( $discount < 0 ) {
-			$discount = 0;
-		}
+        if ( $discount < 0 ) {
+            $discount = 0;
+        }
 
-		if ( $discount > $amount ) {
-			$discount = $amount;
-		}
+        if ( $discount > $amount ) {
+            $discount = $amount;
+        }
 
-		return apply_filters( 'wpinv_discount_total_discount_amount', $discount, $amount, $this );
-	}
+        return apply_filters( 'wpinv_discount_total_discount_amount', $discount, $amount, $this );
+    }
 	
 }