support reset password by email reset link

pkg/mail/default_mailer.go

@@ -0,0 +1,63 @@
+package mail
+
+import (
+	"crypto/tls"
+	"net"
+
+	"gopkg.in/mail.v2"
+
+	"github.com/mayswind/ezbookkeeping/pkg/errs"
+	"github.com/mayswind/ezbookkeeping/pkg/settings"
+	"github.com/mayswind/ezbookkeeping/pkg/utils"
+)
+
+// DefaultMailer represents default mailer
+type DefaultMailer struct {
+	dialer      *mail.Dialer
+	fromAddress string
+}
+
+// NewDefaultMailer returns a new default mailer
+func NewDefaultMailer(smtpConfig *settings.SmtpConfig) (*DefaultMailer, error) {
+	host, portStr, err := net.SplitHostPort(smtpConfig.SmtpHost)
+
+	if err != nil {
+		return nil, errs.ErrSmtpServerHostInvalid
+	}
+
+	port, err := utils.StringToInt(portStr)
+
+	if err != nil {
+		return nil, errs.ErrSmtpServerHostInvalid
+	}
+
+	dialer := mail.NewDialer(host, port, smtpConfig.SmtpUser, smtpConfig.SmtpPasswd)
+	dialer.TLSConfig = &tls.Config{
+		ServerName:         host,
+		InsecureSkipVerify: smtpConfig.SmtpSkipTLSVerify,
+	}
+
+	mailer := &DefaultMailer{
+		dialer:      dialer,
+		fromAddress: smtpConfig.FromAddress,
+	}
+
+	return mailer, nil
+}
+
+// SendMail sends an email according to argument
+func (m *DefaultMailer) SendMail(message *MailMessage) error {
+	if m.dialer == nil {
+		return errs.ErrSmtpServerNotEnabled
+	}
+
+	mailMessage := mail.NewMessage()
+	mailMessage.SetHeader("From", m.fromAddress)
+	mailMessage.SetHeader("To", message.To)
+	mailMessage.SetHeader("Subject", message.Subject)
+	mailMessage.SetBody("text/html", message.Body)
+
+	err := m.dialer.DialAndSend(mailMessage)
+
+	return err
+}

pkg/mail/mail_message.go

@@ -0,0 +1,8 @@
+package mail
+
+// MailMessage represents an email entity
+type MailMessage struct {
+	To      string
+	Subject string
+	Body    string
+}

pkg/mail/mailer.go

@@ -0,0 +1,6 @@
+package mail
+
+// Mailer is email sender interface
+type Mailer interface {
+	SendMail(message *MailMessage) error
+}

pkg/mail/mailer_container.go

@@ -0,0 +1,37 @@
+package mail
+
+import (
+	"github.com/mayswind/ezbookkeeping/pkg/settings"
+)
+
+// MailerContainer contains the current mailer
+type MailerContainer struct {
+	Current Mailer
+}
+
+// Initialize a mailer container singleton instance
+var (
+	Container = &MailerContainer{}
+)
+
+// InitializeMailer initializes the current mailer according to the config
+func InitializeMailer(config *settings.Config) error {
+	if !config.EnableSmtp {
+		Container.Current = nil
+		return nil
+	}
+
+	mailer, err := NewDefaultMailer(config.SmtpConfig)
+
+	if err != nil {
+		return err
+	}
+
+	Container.Current = mailer
+	return nil
+}
+
+// SendMail sends an email according to argument
+func (u *MailerContainer) SendMail(message *MailMessage) error {
+	return u.Current.SendMail(message)
+}