feat: register MSSQL and Postgres drivers in db-wrapper for improved factory pattern support

internal/app/db-wrapper/main.go

@@ -2,18 +2,18 @@ package dbwrapper
 
 import "fmt"
 
-const (
-	postgresDialect = "postgres"
-	mssqlDialect    = "sqlserver"
-)
+type Factory func() DbWrapper
 
-func NewWrapper(driverType string) (DbWrapper, error) {
-	switch driverType {
-	case postgresDialect:
-		return &postgresDbWrapper{dialect: postgresDialect}, nil
-	case mssqlDialect:
-		return &mssqlDbWrapper{dialect: mssqlDialect}, nil
-	default:
+var drivers = make(map[string]Factory)
+
+func Register(name string, factory Factory) {
+	drivers[name] = factory
+}
+
+func New(driverType string) (DbWrapper, error) {
+	factory, ok := drivers[driverType]
+	if !ok {
 		return nil, fmt.Errorf("driver not yet supported: %s", driverType)
 	}
+	return factory(), nil
 }