water.go

package beerXML

import (
	"encoding/xml"
	"strings"
)

// Encloses a set of one or more Water records
type Waters struct {
	Water []Water `xml:"WATER" json:"water,omitempty"`
}

// The term "water" encompasses water profiles.  Though not strictly required for recipes, the water record allows
// supporting programs to record the water profile used for brewing a particular batch.
type Water struct {
	// Name of the water profile – usually the city and country of the water profile.
	Name          string  `xml:"NAME" json:"name,omitempty"`
	// Version of the water record.  Should always be “1” for this version of the XML standard.
	Version       int32   `xml:"VERSION" json:"version,omitempty"`
	// Volume of water to use in a recipe in liters.
	Amount        float64 `xml:"AMOUNT" json:"amount,omitempty"`
	// The amount of calcium (Ca) in parts per million.
	Calcium       float64 `xml:"CALCIUM" json:"calcium,omitempty"`
	// The amount of bicarbonate (HCO3) in parts per million.
	Bicarbonate   float64 `xml:"BICARBONATE" json:"bicarbonate,omitempty"`
	// The amount of Sulfate (SO4) in parts per million.
	Sulfate       float64 `xml:"SULFATE" json:"sulfate,omitempty"`
	// The amount of Chloride (Cl) in parts per million.
	Chloride      float64 `xml:"CHLORIDE" json:"chloride,omitempty"`
	// The amount of Sodium (Na) in parts per million.
	Sodium        float64 `xml:"SODIUM" json:"sodium,omitempty"`
	// The amount of Magnesium (Mg) in parts per million.
	Magnesium     float64 `xml:"MAGNESIUM" json:"magnesium,omitempty"`
	// The PH of the water.
	PH            *float64 `xml:"PH,omitempty" json:"ph,omitempty"`
	Notes         *string  `xml:"NOTES,omitempty" json:"notes,omitempty"`
	// Notes about the water profile.  May be multiline.

	// Extensions

	// The amount of water in this record along with the units formatted for easy display in the current
	// user defined units.  For example “5.0 gal” or “20.0 l”.
	DisplayAmount *string  `xml:"DISPLAY_AMOUNT,omitempty" json:"display_amount,omitempty"`
}


func (a *Water) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
	type Alias Water
	aux := &struct {
		*Alias
	}{
		Alias: (*Alias)(a),
	}

	err := d.DecodeElement(aux, &start)
	if err != nil {
		return err
	}

	return nil
}

func (a Water) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
	type Alias Water
	aux := &struct {
		*Alias
	}{
		Alias: (*Alias)(&a),
	}

	start.Name.Local = strings.ToUpper(start.Name.Local)

	err := e.EncodeElement(aux, start)
	if err != nil {
		return err
	}

	return nil
}