feat: user_rework (todo -> GetAll)

internal/store/roles.go

@@ -14,21 +14,33 @@ type Role struct {
 
 type RoleStore struct {
 	db *sql.DB
+
+	getByNameStmt *sql.Stmt
 }
 
-func (s *RoleStore) GetByName(ctx context.Context, name string) (*Role, error) {
-	query := `
+func NewRoleStore(db *sql.DB) (*RoleStore, error) {
+	getByNameStmt, err := db.PrepareContext(context.Background(), `
 		SELECT id, name, level, description
 		FROM roles
 		WHERE name = $1
-	`
+	`)
+	if err != nil {
+		return nil, err
+	}
 
+	return &RoleStore{
+		db:            db,
+		getByNameStmt: getByNameStmt,
+	}, nil
+}
+
+func (s *RoleStore) GetByName(ctx context.Context, name string) (*Role, error) {
 	ctx, cancel := context.WithTimeout(ctx, QueryTimeout)
 	defer cancel()
 
 	role := &Role{}
 
-	err := s.db.QueryRowContext(ctx, query, name).Scan(
+	err := s.getByNameStmt.QueryRowContext(ctx, name).Scan(
 		&role.ID,
 		&role.Name,
 		&role.Level,