package email import ( "encoding/json" "errors" "gopkg.in/gomail.v2" ) const ( SmtpEmailerType = "smtp" ) func init() { RegisterEmailerConfigType(SmtpEmailerType, func() EmailerConfig { return &SmtpEmailerConfig{} }) } type SmtpEmailerConfig struct { ID string `json:"id"` Host string `json:"host"` Port int `json:"port"` Auth string `json:"auth"` Username string `json:"username"` Password string `json:"password"` } func (cfg SmtpEmailerConfig) EmailerType() string { return SmtpEmailerType } func (cfg SmtpEmailerConfig) EmailerID() string { return cfg.ID } func (cfg SmtpEmailerConfig) Emailer() (Emailer, error) { var dialer *gomail.Dialer if cfg.Auth == "plain" { dialer = gomail.NewPlainDialer(cfg.Host, cfg.Port, cfg.Username, cfg.Password) } else { dialer = &gomail.Dialer{ Host: cfg.Host, Port: cfg.Port, } } return &smtpEmailer{ dialer: dialer, }, nil } type smtpEmailerConfig SmtpEmailerConfig func (cfg *SmtpEmailerConfig) UnmarshalJSON(data []byte) error { smtpCfg := smtpEmailerConfig{} err := json.Unmarshal(data, &smtpCfg) if err != nil { return err } if smtpCfg.Host == "" { return errors.New("must set SMTP host") } if smtpCfg.Port == "" { return errors.New("must set SMTP port") } *cfg = SmtpEmailerConfig(smtpCfg) return nil } type smtpEmailer struct { dialer *gomail.Dialer } func (emailer *smtpEmailer) SendMail(from, subject, text, html string, to ...string) error { msg := gomail.NewMessage() msg.SetHeader("From", from) msg.SetHeader("To", to...) msg.SetHeader("Subject", subject) msg.SetBody("text/plain", text) msg.SetBody("text/html", html) err := emailer.dialer.DialAndSend(msg) if err != nil { counterEmailSendErr.Add(1) return err } return nil }