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mail_senders.go
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/
mail_senders.go
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package mailsenders
import (
"context"
"fmt"
"strings"
"github.com/mailgun/mailgun-go/v4"
)
type MailSender interface {
Send(ctx context.Context, recipient string, obj any) (id string, err error)
}
var _ MailSender = &MailgunSender{}
// MailgunSender is a MailSender that sends e-mails via Mailgun.
type MailgunSender struct {
Mailgun mailgun.Mailgun
MailgunBaseUrl string
SenderAddress string
UseTestMode bool
Subject string
Body *Renderer
}
var _ MailSender = &StdoutSender{}
// StdoutSender is a MailSender that logs the e-mail to stdout.
type StdoutSender struct {
Subject string
Body *Renderer
}
func (s *StdoutSender) Send(ctx context.Context, recipient string, obj any) (string, error) {
body, err := s.Body.Render(obj)
if err != nil {
return "", err
}
border := strings.Repeat("=", 80)
fmt.Printf("\n%s\nRecipient: %s\nSubject: %s\n\n%s\n%s\n", border, recipient, s.Subject, body, border)
return "", nil
}
func NewMailgunSender(domain string, token string, baseUrl string, senderAddress string, body *Renderer, subject string, useTestMode bool) MailgunSender {
mg := mailgun.NewMailgun(domain, token)
mg.SetAPIBase(baseUrl)
return MailgunSender{
Mailgun: mg,
Body: body,
SenderAddress: senderAddress,
UseTestMode: useTestMode,
Subject: subject,
}
}
func (m *MailgunSender) Send(ctx context.Context, recipient string, obj any) (string, error) {
body, err := m.Body.Render(obj)
if err != nil {
return "", err
}
message := m.Mailgun.NewMessage(
m.SenderAddress,
m.Subject,
body,
recipient,
)
if m.UseTestMode {
message.EnableTestMode()
}
_, id, err := m.Mailgun.Send(ctx, message)
return id, err
}