price.go

package helper

import (
	"fmt"

	"github.com/bojanz/currency"
)

const (
	unit = 1000
)

type Price int64

func (c Price) Float() float64 {
	return float64(c) / unit
}

func (c Price) Units() int64 {
	return int64(c)
}

func (c Price) String() string {
	return fmt.Sprintf("%.2f", c.Float())
}

func (c Price) StringWithCurrency(currencySymbol string) string {
	return fmt.Sprintf("%.2f "+currencySymbol, c.Float())
}

func (c Price) StringByLocale(locale, inCurrency string) (string, error) {
	amount, err := currency.NewAmount(c.String(), inCurrency)

	if err != nil {
		return "", err
	}

	return currency.NewFormatter(currency.NewLocale(locale)).Format(amount), nil
}

func NewPrice(amount float64) Price {
	return Price(amount * unit)
}

func NewTotalPrice(amount float64, quantity uint64) Price {
	return NewPrice(float64(NewPrice(amount).Units()*int64(quantity)) / unit)
}

func GetPriceDTO(priceValue float64, priceCurrencyISO4217, countryCodeAlpha2 string) *DTOPrice {
	price := NewPrice(priceValue)

	priceWithCurrency, err := price.StringByLocale(countryCodeAlpha2, priceCurrencyISO4217)

	if err != nil {
		panic(err)
	}

	return &DTOPrice{
		Price:             price.Float(),
		PriceString:       price.String(),
		PriceWithCurrency: priceWithCurrency,
	}
}

type DTOPrice struct {
	Price             float64
	PriceString       string
	PriceWithCurrency string
}