调整SetOptions的方式

smtp/smtp.go

@@ -44,18 +44,18 @@ func NewSmtp() *Smtp {
 	return smtp
 }
 
-func (l *Smtp) SetOption(ctx context.Context, opt ...interfaces.Option) (interfaces.EmailInterface, error) {
+func (l *Smtp) SetOption(ctx context.Context, opt ...interfaces.Option)  error {
 	for _, o := range opt {
 		o(&l.Options)
 	}
 
 	if l.Options.Smtp == nil {
-		return nil, fmt.Errorf("SMTP configuration is required")
+		return  fmt.Errorf("SMTP configuration is required")
 	}
 
 	// 验证配置
 	if err := l.validateConfig(); err != nil {
-		return nil, fmt.Errorf("invalid SMTP config: %w", err)
+		return  fmt.Errorf("invalid SMTP config: %w", err)
 	}
 
 	// 初始化认证
@@ -65,11 +65,13 @@ func (l *Smtp) SetOption(ctx context.Context, opt ...interfaces.Option) (interfa
 	l.Options.Logger.Infof(ctx, "SMTP configured - Host:%s Port:%s Username:%s",
 		l.Options.Smtp.Host, l.Options.Smtp.Port, l.Options.Smtp.Username)
 
-	return l, nil
+	l.IsSet = true
+
+	return nil
 }
 
 func (l *Smtp) Send(ctx context.Context, message interfaces.Message) error {
-	if l.Options.Smtp == nil {
+	if !l.IsSet {
 		return fmt.Errorf("SMTP not initialized")
 	}
 
@@ -441,19 +443,19 @@ func (l *Smtp) writeBody(buffer *bytes.Buffer, boundary string, message interfac
 		altBoundary := "alt-" + boundary
 		buffer.WriteString(fmt.Sprintf("--%s\r\n", boundary))
 		buffer.WriteString(fmt.Sprintf("Content-Type: multipart/alternative; boundary=%s\r\n\r\n", altBoundary))
-		
+
 		// 纯文本版本
 		buffer.WriteString(fmt.Sprintf("--%s\r\n", altBoundary))
 		buffer.WriteString("Content-Type: text/plain; charset=utf-8\r\n")
 		buffer.WriteString("Content-Transfer-Encoding: quoted-printable\r\n\r\n")
 		buffer.WriteString(message.TextBody + "\r\n")
-		
+
 		// HTML版本
 		buffer.WriteString(fmt.Sprintf("--%s\r\n", altBoundary))
 		buffer.WriteString("Content-Type: text/html; charset=utf-8\r\n")
 		buffer.WriteString("Content-Transfer-Encoding: quoted-printable\r\n\r\n")
 		buffer.WriteString(message.Body + "\r\n")
-		
+
 		buffer.WriteString(fmt.Sprintf("--%s--\r\n", altBoundary))
 	} else {
 		// 单一内容类型