query string script

qs.js

export default {

  /**
   * Parse query string from path into POJO. If true is
   * passed as 2nd argument, returns two member array
   * of POJO and the query string portion
   *
   * @example
   * ```js
   * let path = 'http://foo.com/bar?a=1&b=2&c=3'
   *
   * qs.parse(path)
   * //=> { a: 1, b: 2, c: 3 }
   *
   * qs.parse(path, true)
   * //=> [ { a: 1, b: 2, c: 3 }, '?a=1&b=2&c=3' ]
   * ```
   *
   * @param  {String}   path
   * @param  {Boolean}  both=false
   * @return {Object|Array}
   */
  parse(path, both=false) {
    path = decodeURIComponent(path)
    let indexOf = path.indexOf('?')
    let queryString = indexOf > -1 ? path.slice(indexOf) : ''
    let query = {}
    queryString.slice(1).split('&').forEach(segment => {
      if (segment) {
        let pair = segment.split('=')
        query[pair[0]] = pair[1]
      }
    })

    return both ? [query, queryString] : query
  },

  /**
   * Convert POJO into query string
   *
   * @example
   * ```js
   * let o = { a: 1, b: 2, c: 3 }
   *
   * qs.stringify(o)
   * //=> '?a=1&b=2&c=3'
   * ```
   *
   * @param  {Object} obj hash
   * @return {String} query string
   */
  stringify(obj) {
    return '?' + Object.keys(obj).map(key => `${key}=${obj[key]}`).join('&')
  },


  /**
   * Return array split at ?
   *
   * @param  {String} path
   * @return {Array}
   */
  split(path) {
    return path.split('?')
  },

  /**
   * Remove query string from `path`
   *
   * @param  {String} path
   * @return {String} `path` without query string
   */
  strip(path) {
    path = decodeURIComponent(path)
    if (path === 'undefined') return ''
    const i = path.indexOf('?')
    return i > -1 ? path.slice(0, i) : path
  }
}