package data

import "errors"

// 状态枚举
type Status int32

const (
	StatusNone       Status = 0
	StatusOk         Status = 1
	StatusProcessing Status = 2
	StatusDeleted    Status = 3
	StatusFailed     Status = 4
)

var (
	ErrorNotExists = errors.New("not exists")
)

func PageCalc(page, size int) (offset, limit int) {
	if page <= 0 {
		page = 1
	}
	switch {
	case size > 1000:
		size = 1000
	case size <= 0:
		size = 20
	}
	offset = (page - 1) * size
	return offset, size
}