Pusher/pkg/internal/provider/mailer.go

package provider

import (
	"crypto/tls"
	"fmt"
	"git.solsynth.dev/hypernet/pusher/pkg/pushkit"
	"github.com/google/uuid"
	"github.com/jordan-wright/email"
	"github.com/rs/zerolog/log"
	"github.com/spf13/viper"
	"net/smtp"
	"net/textproto"
)

func SendMail(target string, in pushkit.EmailData) error {
	requestId := uuid.NewString()
	log.Debug().
		Str("request_id", requestId).
		Str("to", target).
		Str("subject", in.Subject).
		Msg("Sending email...")

	mail := &email.Email{
		To:      []string{target},
		From:    viper.GetString("mailer.name"),
		Subject: in.Subject,
		Headers: textproto.MIMEHeader{},
	}
	if in.Text != nil {
		mail.Text = []byte(*in.Text)
	}
	if in.HTML != nil {
		mail.HTML = []byte(*in.HTML)
	}
	err := mail.SendWithTLS(
		fmt.Sprintf("%s:%d", viper.GetString("mailer.smtp_host"), viper.GetInt("mailer.smtp_port")),
		smtp.PlainAuth(
			"",
			viper.GetString("mailer.username"),
			viper.GetString("mailer.password"),
			viper.GetString("mailer.smtp_host"),
		),
		&tls.Config{ServerName: viper.GetString("mailer.smtp_host")},
	)

	if err != nil {
		log.Warn().
			Str("request_id", requestId).
			Str("to", target).
			Str("subject", in.Subject).
			Err(err).Msg("Failed to send email...")
	}

	return err
}