phpksort/_helpers/_phpCastString.js

a php ksort function written by javascript

'use strict'

var _typeof = typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol' ? function (obj) { return typeof obj } : function (obj) { return obj && typeof Symbol === 'function' && obj.constructor === Symbol && obj !== Symbol.prototype ? 'symbol' : typeof obj }

module.exports = function _phpCastString(value) {
  // original by: Rafał Kukawski
  //   example 1: _phpCastString(true)
  //   returns 1: '1'
  //   example 2: _phpCastString(false)
  //   returns 2: ''
  //   example 3: _phpCastString('foo')
  //   returns 3: 'foo'
  //   example 4: _phpCastString(0/0)
  //   returns 4: 'NAN'
  //   example 5: _phpCastString(1/0)
  //   returns 5: 'INF'
  //   example 6: _phpCastString(-1/0)
  //   returns 6: '-INF'
  //   example 7: _phpCastString(null)
  //   returns 7: ''
  //   example 8: _phpCastString(undefined)
  //   returns 8: ''
  //   example 9: _phpCastString([])
  //   returns 9: 'Array'
  //   example 10: _phpCastString({})
  //   returns 10: 'Object'
  //   example 11: _phpCastString(0)
  //   returns 11: '0'
  //   example 12: _phpCastString(1)
  //   returns 12: '1'
  //   example 13: _phpCastString(3.14)
  //   returns 13: '3.14'

  var type = typeof value === 'undefined' ? 'undefined' : _typeof(value)

  switch (type) {
    case 'boolean':
      return value ? '1' : ''
    case 'string':
      return value
    case 'number':
      if (isNaN(value)) {
        return 'NAN'
      }

      if (!isFinite(value)) {
        return (value < 0 ? '-' : '') + 'INF'
      }

      return value + ''
    case 'undefined':
      return ''
    case 'object':
      if (Array.isArray(value)) {
        return 'Array'
      }

      if (value !== null) {
        return 'Object'
      }

      return ''
    case 'function':
    // fall through
    default:
      throw new Error('Unsupported value type')
  }
}
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