feat: smtp mail provider implementation

services/mail/mail.go

@@ -1,23 +1,61 @@
 package mail
 
 import (
-	"github.com/emvi/logbuch"
+	"bytes"
+	"fmt"
+	"github.com/markbates/pkger"
 	conf "github.com/muety/wakapi/config"
-	"github.com/muety/wakapi/models"
 	"github.com/muety/wakapi/services"
+	"io/ioutil"
+	"text/template"
 )
 
+const (
+	tplPath              = "/views/mail"
+	tplNamePasswordReset = "reset_password"
+	subjectPasswordReset = "Wakapi – Password Reset"
+)
+
+type passwordResetLinkTplData struct {
+	ResetLink string
+}
+
+// Factory
 func NewMailService() services.IMailService {
 	config := conf.Get()
-	if config.Mail.Provider == conf.MailProviderMailWhale {
-		return NewMailWhaleService(config.Mail.MailWhale)
+	if config.Mail.Enabled {
+		if config.Mail.Provider == conf.MailProviderMailWhale {
+			return NewMailWhaleService(config.Mail.MailWhale)
+		} else if config.Mail.Provider == conf.MailProviderSmtp {
+			return NewSMTPMailService(config.Mail.Smtp)
+		}
 	}
 	return &NoopMailService{}
 }
 
-type NoopMailService struct{}
-
-func (n NoopMailService) SendPasswordResetMail(recipient *models.User, resetLink string) error {
-	logbuch.Info("noop mail service doing nothing instead of sending password reset mail to %s", recipient.ID)
-	return nil
+func getPasswordResetTemplate(data passwordResetLinkTplData) (*bytes.Buffer, error) {
+	tpl, err := loadTemplate(tplNamePasswordReset)
+	if err != nil {
+		return nil, err
+	}
+	var rendered bytes.Buffer
+	if err := tpl.Execute(&rendered, data); err != nil {
+		return nil, err
+	}
+	return &rendered, nil
+}
+
+func loadTemplate(tplName string) (*template.Template, error) {
+	tplFile, err := pkger.Open(fmt.Sprintf("%s/%s.tpl.html", tplPath, tplName))
+	if err != nil {
+		return nil, err
+	}
+	defer tplFile.Close()
+
+	tplData, err := ioutil.ReadAll(tplFile)
+	if err != nil {
+		return nil, err
+	}
+
+	return template.New(tplName).Parse(string(tplData))
 }