david
a07d033e93
Replace nil email service pattern with NoOpEmailService (Null Object) to eliminate nil pointer panics across all handlers. Add /docs route as a shortcut to Swagger UI. Fix streak calculation returning 0 when server timezone differs from UTC — CreatedAt was not converted to UTC before date extraction.
138 lines
3.1 KiB
Go
138 lines
3.1 KiB
Go
package email
|
|
|
|
import (
|
|
"crypto/tls"
|
|
"fmt"
|
|
"log"
|
|
"strings"
|
|
"time"
|
|
|
|
"apocapoc-api/internal/domain/services"
|
|
|
|
"gopkg.in/mail.v2"
|
|
)
|
|
|
|
type SMTPConfig struct {
|
|
Host string
|
|
Port int
|
|
Username string
|
|
Password string
|
|
From string
|
|
SupportEmail string
|
|
}
|
|
|
|
type SMTPService struct {
|
|
config SMTPConfig
|
|
}
|
|
|
|
func NewSMTPService(config SMTPConfig) *SMTPService {
|
|
return &SMTPService{
|
|
config: config,
|
|
}
|
|
}
|
|
|
|
func (s *SMTPService) Send(message services.EmailMessage) error {
|
|
m := mail.NewMessage()
|
|
m.SetHeader("From", s.config.From)
|
|
m.SetHeader("To", message.To)
|
|
m.SetHeader("Subject", message.Subject)
|
|
|
|
if message.IsHTML {
|
|
m.SetBody("text/html", message.Body)
|
|
} else {
|
|
m.SetBody("text/plain", message.Body)
|
|
}
|
|
|
|
dialer := mail.NewDialer(s.config.Host, s.config.Port, s.config.Username, s.config.Password)
|
|
dialer.TLSConfig = &tls.Config{
|
|
ServerName: s.config.Host,
|
|
}
|
|
|
|
// Use SSL from start for port 465, STARTTLS for other ports
|
|
if s.config.Port == 465 {
|
|
dialer.SSL = true
|
|
}
|
|
|
|
if err := s.sendWithRetry(dialer, m); err != nil {
|
|
log.Printf("[EMAIL] status=failed to=%s subject=%q error=%q", message.To, message.Subject, err.Error())
|
|
return fmt.Errorf("failed to send email: %w", err)
|
|
}
|
|
|
|
log.Printf("[EMAIL] status=sent to=%s subject=%q", message.To, message.Subject)
|
|
return nil
|
|
}
|
|
|
|
func (s *SMTPService) sendWithRetry(dialer *mail.Dialer, message *mail.Message) error {
|
|
maxRetries := 3
|
|
var lastErr error
|
|
|
|
for i := 0; i < maxRetries; i++ {
|
|
if err := dialer.DialAndSend(message); err == nil {
|
|
return nil
|
|
} else {
|
|
lastErr = err
|
|
|
|
if isAuthError(err) {
|
|
return fmt.Errorf("SMTP authentication failed. Please check your SMTP credentials (username, password, and from address)")
|
|
}
|
|
|
|
if isConfigError(err) {
|
|
return fmt.Errorf("SMTP configuration error: %w", err)
|
|
}
|
|
|
|
if i < maxRetries-1 {
|
|
time.Sleep(time.Second * time.Duration(i+1))
|
|
}
|
|
}
|
|
}
|
|
|
|
return fmt.Errorf("failed to send email after %d attempts: %w", maxRetries, lastErr)
|
|
}
|
|
|
|
func isAuthError(err error) bool {
|
|
errStr := strings.ToLower(err.Error())
|
|
return strings.Contains(errStr, "authentication failed") ||
|
|
strings.Contains(errStr, "535") ||
|
|
strings.Contains(errStr, "invalid credentials")
|
|
}
|
|
|
|
func isConfigError(err error) bool {
|
|
errStr := strings.ToLower(err.Error())
|
|
return strings.Contains(errStr, "connection refused") ||
|
|
strings.Contains(errStr, "no such host") ||
|
|
strings.Contains(errStr, "network is unreachable")
|
|
}
|
|
|
|
func (s *SMTPService) GetConfig() SMTPConfig {
|
|
return s.config
|
|
}
|
|
|
|
func (s *SMTPService) IsEnabled() bool {
|
|
return true
|
|
}
|
|
|
|
func (s *SMTPService) HealthCheck() error {
|
|
dialer := mail.NewDialer(s.config.Host, s.config.Port, s.config.Username, s.config.Password)
|
|
dialer.TLSConfig = &tls.Config{
|
|
ServerName: s.config.Host,
|
|
}
|
|
|
|
if s.config.Port == 465 {
|
|
dialer.SSL = true
|
|
}
|
|
|
|
smtpCloser, err := dialer.Dial()
|
|
if err != nil {
|
|
if isAuthError(err) {
|
|
return fmt.Errorf("SMTP authentication failed: %w", err)
|
|
}
|
|
if isConfigError(err) {
|
|
return fmt.Errorf("SMTP connection failed: %w", err)
|
|
}
|
|
return fmt.Errorf("SMTP error: %w", err)
|
|
}
|
|
defer smtpCloser.Close()
|
|
|
|
return nil
|
|
}
|