support reset password by email reset link

pkg/services/forget_passwords.go

@@ -0,0 +1,81 @@
+package services
+
+import (
+	"bytes"
+	"fmt"
+	"net/url"
+
+	"github.com/mayswind/ezbookkeeping/pkg/errs"
+	"github.com/mayswind/ezbookkeeping/pkg/locales"
+	"github.com/mayswind/ezbookkeeping/pkg/mail"
+	"github.com/mayswind/ezbookkeeping/pkg/models"
+	"github.com/mayswind/ezbookkeeping/pkg/settings"
+	"github.com/mayswind/ezbookkeeping/pkg/templates"
+)
+
+const passwordResetUrlFormat = "%sdesktop/#/resetpassword?token=%s"
+
+// ForgetPasswordService represents forget password service
+type ForgetPasswordService struct {
+	ServiceUsingConfig
+	ServiceUsingMailer
+}
+
+// Initialize a forget password service singleton instance
+var (
+	ForgetPasswords = &ForgetPasswordService{
+		ServiceUsingConfig: ServiceUsingConfig{
+			container: settings.Container,
+		},
+		ServiceUsingMailer: ServiceUsingMailer{
+			container: mail.Container,
+		},
+	}
+)
+
+// SendPasswordResetEmail sends password reset email according to specified parameters
+func (s *ForgetPasswordService) SendPasswordResetEmail(user *models.User, passwordResetToken string) error {
+	if !s.CurrentConfig().EnableSmtp {
+		return errs.ErrSmtpServerNotEnabled
+	}
+
+	localeTextItems := locales.GetLocaleTextItems(user.Language)
+	forgetPasswordTextItems := localeTextItems.ForgetPasswordMailTextItems
+
+	expireTimeInMinutes := s.CurrentConfig().ForgetPasswordTokenExpiredTimeDuration.Minutes()
+	passwordResetUrl := fmt.Sprintf(passwordResetUrlFormat, s.CurrentConfig().RootUrl, url.QueryEscape(passwordResetToken))
+
+	tmpl, err := templates.GetTemplate("email/password_reset")
+
+	if err != nil {
+		return err
+	}
+
+	templateParams := map[string]interface{}{
+		"ForgetPasswordMail": map[string]interface{}{
+			"Title":               forgetPasswordTextItems.Title,
+			"Salutation":          fmt.Sprintf(forgetPasswordTextItems.SalutationFormat, user.Nickname),
+			"DescriptionAboveBtn": forgetPasswordTextItems.DescriptionAboveBtn,
+			"ResetPasswordUrl":    passwordResetUrl,
+			"ResetPassword":       forgetPasswordTextItems.ResetPassword,
+			"DescriptionBelowBtn": fmt.Sprintf(forgetPasswordTextItems.DescriptionBelowBtnFormat, expireTimeInMinutes),
+		},
+	}
+
+	var bodyBuffer bytes.Buffer
+	err = tmpl.Execute(&bodyBuffer, templateParams)
+
+	if err != nil {
+		return err
+	}
+
+	message := &mail.MailMessage{
+		To:      user.Email,
+		Subject: forgetPasswordTextItems.Title,
+		Body:    bodyBuffer.String(),
+	}
+
+	err = s.SendMail(message)
+
+	return err
+}