chore: extract mail to it's own service

handler/auth.go

@@ -73,7 +73,7 @@ func (handler HandlerAuthImpl) handleSignIn() http.HandlerFunc {
 				http.Error(w, "Invalid email or password", http.StatusUnauthorized)
 			} else {
 				utils.LogError("Error signing in", err)
-				http.Error(w, "An error occurred", http.StatusInternalServerError)
+				http.Error(w, "InternalServerErr", http.StatusInternalServerError)
 			}
 			return
 		}

handler/auth_test.go

@@ -0,0 +1,11 @@
+package handler
+
+import (
+	"testing"
+)
+
+func TestHandleSignIn(t *testing.T) {
+	t.Parallel()
+	t.Run("should signIn and return session cookie", func(t *testing.T) {
+	})
+}

handler/default.go

@@ -14,7 +14,7 @@ func GetHandler(d *sql.DB) http.Handler {
 
 	router.HandleFunc("/", service.HandleIndexAnd404(d))
 
-	handlerAuth := NewHandlerAuth(d, service.NewServiceAuthImpl(db.NewDbAuthSqlite(d)))
+	handlerAuth := NewHandlerAuth(d, service.NewServiceAuthImpl(db.NewDbAuthSqlite(d), service.NewServiceMail()))
 
 	// Serve static files (CSS, JS and images)
 	router.Handle("/static/", http.StripPrefix("/static/", http.FileServer(http.Dir("./static/"))))

service/auth.go

@@ -49,11 +49,13 @@ type ServiceAuth interface {
 
 type ServiceAuthImpl struct {
 	dbAuth db.DbAuth
+	mail   ServiceMail
 }
 
-func NewServiceAuthImpl(dbAuth db.DbAuth) *ServiceAuthImpl {
+func NewServiceAuthImpl(dbAuth db.DbAuth, mail ServiceMail) *ServiceAuthImpl {
 	return &ServiceAuthImpl{
 		dbAuth: dbAuth,
+		mail:   mail,
 	}
 }
 
@@ -399,7 +401,8 @@ func HandleDeleteAccountComp(db *sql.DB) http.HandlerFunc {
 			return
 		}
 
-		go utils.SendMail(user.Email, "Account deleted", "Your account has been deleted")
+		//TODO
+		// go utils.SendMail(user.Email, "Account deleted", "Your account has been deleted")
 
 		utils.DoRedirect(w, r, "/")
 	}
@@ -577,7 +580,8 @@ func HandleResetPasswordComp(db *sql.DB) http.HandlerFunc {
 				utils.TriggerToast(w, r, "error", "Internal Server Error")
 				return
 			}
-			utils.SendMail(email, "Reset Password", mail.String())
+			//TODO
+			// utils.SendMail(email, "Reset Password", mail.String())
 		}
 
 		utils.TriggerToast(w, r, "info", "If the email exists, an email has been sent")
@@ -612,7 +616,8 @@ func sendVerificationEmail(db *sql.DB, userId string, email string) {
 		utils.LogError("Could not render welcome email", err)
 		return
 	}
-	utils.SendMail(email, "Welcome to ME-FIT", w.String())
+	//TODO
+	// utils.SendMail(email, "Welcome to ME-FIT", w.String())
 }
 
 func TryCreateSessionAndSetCookie(r *http.Request, w http.ResponseWriter, db *sql.DB, user_uuid uuid.UUID) error {

service/mail.go

@@ -0,0 +1,93 @@
+package service
+
+import (
+	"fmt"
+	"log"
+	"me-fit/utils"
+	"net/smtp"
+	"os"
+)
+
+type ServiceMail interface {
+	SendMail(to string, subject string, message string) error
+}
+
+func NewServiceMail() ServiceMail {
+	enabled := os.Getenv("SMTP_ENABLED") == "true"
+	host := os.Getenv("SMTP_HOST")
+	port := os.Getenv("SMTP_PORT")
+	user := os.Getenv("SMTP_USER")
+	pass := os.Getenv("SMTP_PASS")
+	fromMail := os.Getenv("SMTP_FROM_MAIL")
+	fromName := os.Getenv("SMTP_FROM_NAME")
+
+	if enabled {
+		if host == "" {
+			log.Fatal("SMTP_HOST must be set")
+		}
+		if port == "" {
+			log.Fatal("SMTP_PORT must be set")
+		}
+		if user == "" {
+			log.Fatal("SMTP_USER must be set")
+		}
+		if pass == "" {
+			log.Fatal("SMTP_PASS must be set")
+		}
+		if fromMail == "" {
+			log.Fatal("SMTP_FROM_MAIL must be set")
+		}
+		if fromName == "" {
+			log.Fatal("SMTP_FROM_NAME must be set")
+		}
+
+		return NewServiceMailSmtp(host, port, user, pass, fromMail, fromName)
+	} else {
+		if utils.Environment == "prod" {
+			log.Fatal("SMTP_ENABLED must be set to true in production")
+		}
+		return NewServiceMailStub()
+	}
+}
+
+type ServiceMailSmtp struct {
+	host     string
+	port     string
+	auth     smtp.Auth
+	fromMail string
+	fromName string
+}
+
+func NewServiceMailSmtp(
+	host string,
+	port string,
+	user string,
+	pass string,
+	fromMail string,
+	fromName string) ServiceMailSmtp {
+	return ServiceMailSmtp{
+		host:     host,
+		port:     port,
+		auth:     smtp.PlainAuth("", user, pass, host),
+		fromMail: fromMail,
+		fromName: fromName,
+	}
+}
+
+func (service ServiceMailSmtp) SendMail(to string, subject string, message string) error {
+
+	msg := fmt.Sprintf("From: %v <%v>\nTo: %v\nSubject: %v\nMIME-version: 1.0;\nContent-Type: text/html; charset=\"UTF-8\";\n\n%v", service.fromName, service.fromMail, to, subject, message)
+
+	return smtp.SendMail(service.host+":"+service.port, service.auth, service.fromMail, []string{to}, []byte(msg))
+}
+
+type ServiceMailStub struct {
+}
+
+func NewServiceMailStub() ServiceMailStub {
+	return ServiceMailStub{}
+}
+
+func (service ServiceMailStub) SendMail(to string, subject string, message string) error {
+	return nil
+}

utils/env.go

@@ -7,44 +7,14 @@ import (
 )
 
 var (
-	SmtpHost     string
-	SmtpPort     string
-	SmtpUser     string
-	SmtpPass     string
-	SmtpFromMail string
-	SmtpFromName string
-	BaseUrl      string
-	Environment  string
+	BaseUrl     string
+	Environment string
 )
 
 func MustInitEnv() {
-	SmtpHost = os.Getenv("SMTP_HOST")
-	SmtpPort = os.Getenv("SMTP_PORT")
-	SmtpUser = os.Getenv("SMTP_USER")
-	SmtpPass = os.Getenv("SMTP_PASS")
-	SmtpFromMail = os.Getenv("SMTP_FROM_MAIL")
-	SmtpFromName = os.Getenv("SMTP_FROM_NAME")
 	BaseUrl = os.Getenv("BASE_URL")
 	Environment = os.Getenv("ENVIRONMENT")
 
-	if SmtpHost == "" {
-		log.Fatal("SMTP_HOST must be set")
-	}
-	if SmtpPort == "" {
-		log.Fatal("SMTP_PORT must be set")
-	}
-	if SmtpUser == "" {
-		log.Fatal("SMTP_USER must be set")
-	}
-	if SmtpPass == "" {
-		log.Fatal("SMTP_PASS must be set")
-	}
-	if SmtpFromMail == "" {
-		log.Fatal("SMTP_FROM_MAIL must be set")
-	}
-	if SmtpFromName == "" {
-		log.Fatal("SMTP_FROM_NAME must be set")
-	}
 	if BaseUrl == "" {
 		log.Fatal("BASE_URL must be set")
 	}

utils/mail.go

@@ -1,15 +0,0 @@
-package utils
-
-import (
-	"fmt"
-	"net/smtp"
-)
-
-func SendMail(to string, subject string, message string) error {
-
-	auth := smtp.PlainAuth("", SmtpUser, SmtpPass, SmtpHost)
-
-	msg := fmt.Sprintf("From: %v <%v>\nTo: %v\nSubject: %v\nMIME-version: 1.0;\nContent-Type: text/html; charset=\"UTF-8\";\n\n%v", SmtpFromName, SmtpFromMail, to, subject, message)
-
-	return smtp.SendMail(SmtpHost+":"+SmtpPort, auth, SmtpFromMail, []string{to}, []byte(msg))
-}