app/email/email.go

package email

import (
	"github.com/spf13/viper"
	"gopkg.in/gomail.v2"
)

func init() {
	// viper.SetDefault("email.type", "smtp")
	viper.SetDefault("email.host", "mail.kumoly.io")
	viper.SetDefault("email.port", 587)
	viper.SetDefault("email.username", "test@kumoly.io")
	viper.SetDefault("email.password", "test")
	viper.SetDefault("logo", "http://www.duchess-france.org/wp-content/uploads/2016/01/gopher.png")
}

type App struct {
	Name        string
	Link        string
	Logo        string
	Copyright   string
	TroubleText string
}

type Button struct {
	Text string
	Link string

	// Color of the button, default blue(#3869D4)
	Color string
	// TextColor of the button, default blue(#ffffff)
	TextColor string
}

type Action struct {
	// Instructions text show before button
	Instructions string

	// InviteCode should not be used with button
	InviteCode string
	Button     Button
}

type Body struct {
	// App replaced with global config
	App App

	Intros  []string
	Content string
	Outros  []string

	Actions []Action

	// Greeting ignored if empty
	Greeting string
	// Receiver ignored if Greeting or Receiver empty
	Receiver string

	// Signature default `Best Regards`
	Signature string
	// Sender default {{.App.Name}}
	Sender string
}

// host string, port int, username string, password string
var dial *gomail.Dialer

func Send(From string, To []string, Title string, b *Body) error {

	m := gomail.NewMessage()
	m.SetHeader("From", From)
	m.SetHeader("To", To...)
	m.SetHeader("Subject", Title)
	// m.SetAddressHeader("Cc", "dan@example.com", "Dan")
	// m.Attach("/home/Alex/lolcat.jpg")

	body, err := Parse(b)
	if err != nil {
		return err
	}
	m.SetBody("text/html", body)

	// Send the email
	return dial.DialAndSend(m)
}