优化结构

internal/integration/email/email.go

@@ -36,16 +36,30 @@ func (r *emailRepo) email() *conf.AdminBackend_Email {
 }
 
 func (r *emailRepo) Enabled() bool {
-	config := r.email()
-	return config != nil && config.Host != "" && config.From != "" && config.Secret != "" && config.Port > 0
+	return emailEnabled(r.email())
 }
 
 func (r *emailRepo) DefaultRecipients() []string {
 	config := r.email()
-	if config == nil {
+	if config == nil || strings.TrimSpace(config.To) == "" {
 		return nil
 	}
-	return []string{config.To}
+	return []string{strings.TrimSpace(config.To)}
+}
+
+func emailEnabled(config *conf.AdminBackend_Email) bool {
+	return config != nil && strings.TrimSpace(config.Host) != "" &&
+		strings.TrimSpace(config.From) != "" && strings.TrimSpace(config.Secret) != "" && config.Port > 0
+}
+
+func normalizeRecipients(values []string) []string {
+	result := make([]string, 0, len(values))
+	for _, value := range values {
+		if value = strings.TrimSpace(value); value != "" {
+			result = append(result, value)
+		}
+	}
+	return result
 }
 
 func cleanHeader(value string) string {
@@ -53,19 +67,23 @@ func cleanHeader(value string) string {
 }
 
 func (r *emailRepo) Send(ctx context.Context, to []string, subject, body string) error {
-	if !r.Enabled() {
+	config := r.email()
+	if !emailEnabled(config) {
 		return errors.New("邮件服务未配置")
 	}
+	to = normalizeRecipients(to)
 	if len(to) == 0 {
 		return errors.New("收件人不能为空")
 	}
-	config := r.email()
+	if ctx == nil {
+		ctx = context.Background()
+	}
 	address := net.JoinHostPort(config.Host, fmt.Sprint(config.Port))
 	dialer := &net.Dialer{Timeout: 10 * time.Second}
 	var conn net.Conn
 	var err error
 	if config.IsSsl {
-		conn, err = tls.DialWithDialer(dialer, "tcp", address, &tls.Config{ServerName: config.Host, MinVersion: tls.VersionTLS12})
+		conn, err = (&tls.Dialer{NetDialer: dialer, Config: &tls.Config{ServerName: config.Host, MinVersion: tls.VersionTLS12}}).DialContext(ctx, "tcp", address)
 	} else {
 		conn, err = dialer.DialContext(ctx, "tcp", address)
 	}