Start refactoring

data/datasource/pgsql/pgsql.go

@@ -0,0 +1,30 @@
+package pgsql
+
+import (
+	"gorm.io/driver/postgres"
+	"gorm.io/gorm"
+	"opensavecloudserver/data/datasource"
+)
+
+type (
+	DatabaseDatasource struct {
+		conn *gorm.DB
+	}
+)
+
+func NewDatabaseDatasource() datasource.Datasource {
+	return new(DatabaseDatasource)
+}
+
+func (dd *DatabaseDatasource) Connect(dsn string) error {
+	conn, err := gorm.Open(postgres.Open(dsn))
+	if err != nil {
+		return err
+	}
+	dd.conn = conn
+	return nil
+}
+
+func (dd *DatabaseDatasource) DB() *gorm.DB {
+	return dd.conn
+}