split watcher and http server from sender + add golanci config

mail/mail.go

@@ -20,30 +20,29 @@ type Email struct {
 }
 
 func FromJSON(path string) (Email, error) {
-	var mail Email
+	var email Email
 
 	content, err := os.ReadFile(path)
 	if err != nil {
-		return mail, fmt.Errorf("%w, unable to read the file: %s", err, path)
+		return email, fmt.Errorf("%w, unable to read the file: %s", err, path)
 	}
 
-	if err := json.Unmarshal(content, &mail); err != nil {
-		return mail, err
+	if err := json.Unmarshal(content, &email); err != nil {
+		return email, err
 	}
 
-	validate = validator.New(validator.WithRequiredStructEnabled())
-	if err := validate.Struct(mail); err != nil {
-		return mail, err
+	if err := email.Validate(); err != nil {
+		return email, err
 	}
 
-	return mail, nil
+	return email, nil
 }
 
-func (e Email) GetReceivers() []string {
+func (e *Email) GetReceivers() []string {
 	return strings.Split(e.Receivers, ",")
 }
 
-func (e Email) Generate() []byte {
+func (e *Email) Generate() []byte {
 	mail := fmt.Sprintf(
 		"To: %s\nFrom: %s\nContent-Type: text/html;charset=utf-8\nSubject: %s\n\n%s",
 		e.Receivers,
@@ -53,3 +52,11 @@ func (e Email) Generate() []byte {
 	)
 	return []byte(mail)
 }
+
+func (e *Email) Validate() error {
+	validate = validator.New(validator.WithRequiredStructEnabled())
+	if err := validate.Struct(e); err != nil {
+		return err
+	}
+	return nil
+}

mail/mail_test.go

@@ -56,5 +56,4 @@ func TestFromJson(t *testing.T) {
 
 		assert.Contains(t, err.Error(), "validation for 'Sender'")
 	})
-
 }