103 lines
2.6 KiB
Go
103 lines
2.6 KiB
Go
package mail
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import (
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"context"
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"encoding/json"
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"errors"
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"fmt"
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"github.com/jackc/pgx/v5"
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"github.com/ultisuite/ulti-backend/internal/mail/listunsubscribe"
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"github.com/ultisuite/ulti-backend/internal/mail/smtp"
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)
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// MailSender sends immediately without outbox persistence.
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type MailSender interface {
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Send(ctx context.Context, req *smtp.SendRequest) error
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}
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var (
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ErrListUnsubscribeUnavailable = errors.New("list-unsubscribe mailto not available")
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ErrListUnsubscribeNoMailto = errors.New("list-unsubscribe has no mailto target")
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)
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type messageAuthInfo struct {
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ListUnsubscribe string `json:"list_unsubscribe"`
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}
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// SendMailtoListUnsubscribe sends the RFC 2369 mailto unsubscribe without outbox or sent copy.
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func (s *Service) SendMailtoListUnsubscribe(
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ctx context.Context,
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externalID, messageID string,
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sender MailSender,
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) (*listunsubscribe.Mailto, error) {
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if sender == nil {
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return nil, errors.New("mail sender not configured")
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}
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var accountID string
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var authRaw []byte
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err := s.db.QueryRow(ctx, `
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SELECT m.account_id, m.auth_info
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FROM messages m
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JOIN mail_accounts ma ON m.account_id = ma.id
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WHERE m.id = $1 AND ma.user_id = (SELECT id FROM users WHERE external_id = $2)
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`, messageID, externalID).Scan(&accountID, &authRaw)
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if err != nil {
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if errors.Is(err, pgx.ErrNoRows) {
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return nil, ErrNotFound
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}
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return nil, err
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}
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var auth messageAuthInfo
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if len(authRaw) > 0 {
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_ = json.Unmarshal(authRaw, &auth)
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}
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parsed := listunsubscribe.Parse(auth.ListUnsubscribe)
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if parsed.Mailto == nil {
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if parsed.HTTP != "" {
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return nil, fmt.Errorf("%w: use http url", ErrListUnsubscribeNoMailto)
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}
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return nil, ErrListUnsubscribeUnavailable
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}
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fromEmail, err := s.resolveAccountFromEmail(ctx, accountID)
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if err != nil {
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return nil, err
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}
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m := parsed.Mailto
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req := &smtp.SendRequest{
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AccountID: accountID,
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From: fromEmail,
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To: []string{m.Address},
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Subject: m.Subject,
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BodyText: m.Body,
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}
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if err := sender.Send(ctx, req); err != nil {
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return nil, err
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}
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return m, nil
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}
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func (s *Service) resolveAccountFromEmail(ctx context.Context, accountID string) (string, error) {
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var fromEmail string
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err := s.db.QueryRow(ctx, `
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SELECT mi.email FROM mail_identities mi
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JOIN mail_accounts ma ON mi.account_id = ma.id
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WHERE ma.id = $1 AND mi.is_default = true
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LIMIT 1
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`, accountID).Scan(&fromEmail)
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if err == nil && fromEmail != "" {
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return fromEmail, nil
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}
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if err := s.db.QueryRow(ctx, `SELECT email FROM mail_accounts WHERE id = $1`, accountID).Scan(&fromEmail); err != nil {
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return "", err
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}
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if fromEmail == "" {
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return "", errors.New("account has no from address")
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}
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return fromEmail, nil
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}
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