add button to add new image to class closes #15

logic/db_types/utils.go

@@ -29,7 +29,7 @@ type BasePackStruct struct {
 }
 
 func (b BasePackStruct) GetHost() string {
-    return b.Host
+	return b.Host
 }
 
 func (b BasePackStruct) GetDb() *sql.DB {
@@ -315,6 +315,31 @@ func InsertReturnId(c QueryInterface, store interface{}, tablename string, retur
 	return
 }
 
+func GetDbVar[T interface{}](c QueryInterface, var_to_extract string, tablename string, args ...any) (*T, error) {
+	db_query, err := c.Prepare(fmt.Sprintf("select %s from %s", var_to_extract, tablename))
+	if err != nil {
+		return nil, err
+	}
+	defer db_query.Close()
+
+	rows, err := db_query.Query(args...)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	if !rows.Next() {
+		return nil, NotFoundError
+	}
+
+	dat := new(T)
+	if err = rows.Scan(dat); err != nil {
+		return nil, err
+	}
+
+	return dat, nil
+}
+
 func GetDBOnce(db QueryInterface, store interface{}, tablename string, args ...any) error {
 	t := reflect.TypeOf(store).Elem()