feat(mail): #132 unify env variables and send mails with smtp

utils/db.go

@@ -9,7 +9,7 @@ import (
 	_ "github.com/golang-migrate/migrate/v4/source/file"
 )
 
-func RunMigrations(db *sql.DB) {
+func MustRunMigrations(db *sql.DB) {
 	driver, err := sqlite3.WithInstance(db, &sqlite3.Config{})
 	if err != nil {
 		log.Fatal(err)

utils/env.go

@@ -0,0 +1,57 @@
+package utils
+
+import (
+	"log"
+	"log/slog"
+	"os"
+)
+
+var (
+	SmtpHost     string
+	SmtpPort     string
+	SmtpUser     string
+	SmtpPass     string
+	SmtpFromMail string
+	SmtpFromName string
+	BaseUrl      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")
+
+	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")
+	}
+
+	slog.Info("BASE_URL is " + BaseUrl)
+	slog.Info("SMTP_HOST is " + SmtpHost)
+	slog.Info("SMTP_PORT is " + SmtpPort)
+	slog.Info("SMTP_USER is " + SmtpUser)
+	slog.Info("SMTP_PASS is " + SmtpPass)
+	slog.Info("SMTP_FROM_MAIL is " + SmtpFromMail)
+	slog.Info("SMTP_FROM_NAME is " + SmtpFromName)
+}

utils/mail.go

@@ -0,0 +1,19 @@
+package utils
+
+import (
+	"log/slog"
+	"net/smtp"
+)
+
+func SendWelcomeMail(to string) {
+
+	auth := smtp.PlainAuth("", SmtpUser, SmtpPass, SmtpHost)
+
+	msg := "From: " + SmtpFromName + " <" + SmtpFromMail + ">\nTo: " + to + "\nSubject: Welcome to me-fit\n\nWelcome to me-fit!"
+
+	err := smtp.SendMail(SmtpHost+":"+SmtpPort, auth, SmtpFromMail, []string{to}, []byte(msg))
+	if err != nil {
+		slog.Error("Could not send mail: " + err.Error())
+	}
+
+}