Convert db backend to use Gorm, with basis for support

for Mysql and Postgres in addition to existing Sqlite

backend/cmd/server/main.go

@@ -11,6 +11,8 @@ import (
 	"npm/internal/entity/certificate"
 	"npm/internal/entity/host"
 	"npm/internal/entity/setting"
+	"npm/internal/entity/user"
+	"npm/internal/errors"
 	"npm/internal/jobqueue"
 	"npm/internal/logger"
 )
@@ -25,7 +27,7 @@ func main() {
 
 	database.Migrate(func() {
 		setting.ApplySettings()
-		database.CheckSetup()
+		checkSetup()
 
 		// Internal Job Queue
 		jobqueue.Start()
@@ -41,7 +43,8 @@ func main() {
 			if irq == syscall.SIGINT || irq == syscall.SIGTERM {
 				logger.Info("Got ", irq, " shutting server down ...")
 				// Close db
-				err := database.GetInstance().Close()
+				sqlDB, _ := database.GetDB().DB()
+				err := sqlDB.Close()
 				if err != nil {
 					logger.Error("DatabaseCloseError", err)
 				}
@@ -52,3 +55,28 @@ func main() {
 		}
 	})
 }
+
+// checkSetup Quick check by counting the number of users in the database
+func checkSetup() {
+	db := database.GetDB()
+	var count int64
+
+	if db != nil {
+		db.Model(&user.Model{}).
+			Where("is_disabled = ?", false).
+			Where("is_system = ?", false).
+			Count(&count)
+
+		if count == 0 {
+			logger.Warn("No users found, starting in Setup Mode")
+		} else {
+			config.IsSetup = true
+			logger.Info("Application is setup")
+		}
+		if config.ErrorReporting {
+			logger.Warn("Error reporting is enabled - Application Errors WILL be sent to Sentry, you can disable this in the Settings interface")
+		}
+	} else {
+		logger.Error("DatabaseError", errors.ErrDatabaseUnavailable)
+	}
+}