import isString from '../.internal/isString'

/**
 * @module utils
 */

/**
 * @name paging
 * @static
 * 
 * @description
 * Page Data를 Paging 객체로 변환
 *
 * @param {PagingParameters} params 
 * 
 **/ 

function paging(params:PagingParameters) : Paging {

	let page: number = isString(params.page) ? parseInt(params.page as string, 10) : (params.page || 1) as number
	let size: number = isString(params.size) ? parseInt(params.size as string, 10) : (params.size || 20) as number

	page = Math.max(page, 1) - 1
	size = Math.max(size, 0)

  return {
    page: page * size,
    size: size
  }
}

export default paging