niki/validator/sort.go

package validator

import (
	"fmt"
	"slices"

	params "git.gocasts.ir/ebhomengo/niki/param"
	errmsg "git.gocasts.ir/ebhomengo/niki/pkg/err_msg"
	validation "github.com/go-ozzo/ozzo-validation/v4"
)

func AreSortFieldsValid(validSortFields []string) validation.RuleFunc {
	return func(value interface{}) error {
		sort, ok := value.(params.SortRequest)
		if !ok {
			return fmt.Errorf(errmsg.ErrorMsgSomethingWentWrong)
		}
		if sort.Field == "" && sort.Direction != "" {
			return fmt.Errorf(errmsg.ErrorMsgSortFieldIsRequired)
		}
		if sort.Direction != "" && sort.Direction != params.AscSortDirection && sort.Direction != params.DescSortDirection {
			return fmt.Errorf(errmsg.ErrorMsgSortDirectionShouldBeAscOrDesc)
		}
		if sort.Field != "" && !slices.Contains(validSortFields, sort.Field) {
			return fmt.Errorf(errmsg.ErrorMsgSortFieldIsNotValid)
		}

		return nil
	}
}