js.cookie.mjs

function extend () {
  var i = 0
  var result = {}
  for (; i < arguments.length; i++) {
    var attributes = arguments[i]
    for (var key in attributes) {
      result[key] = attributes[key]
    }
  }
  return result
}

function decode (s) {
  return s.replace(/(%[0-9A-Z]{2})+/g, decodeURIComponent)
}

function init (converter) {
  function api () { }

  function set (key, value, attributes) {
    if (typeof document === 'undefined') {
      return
    }

    attributes = extend(
      {
        path: '/'
      },
      api.defaults,
      attributes
    )

    if (typeof attributes.expires === 'number') {
      attributes.expires = new Date(
        new Date() * 1 + attributes.expires * 864e5
      )
    }

    attributes.expires = attributes.expires
      ? attributes.expires.toUTCString()
      : ''

    try {
      var result = JSON.stringify(value)
      if (/^[{[]/.test(result)) {
        value = result
      }
    } catch (e) { }

    value = converter.write
      ? converter.write(value, key)
      : encodeURIComponent(String(value)).replace(
        /%(23|24|26|2B|3A|3C|3E|3D|2F|3F|40|5B|5D|5E|60|7B|7D|7C)/g,
        decodeURIComponent
      )

    key = encodeURIComponent(String(key))
      .replace(/%(23|24|26|2B|5E|60|7C)/g, decodeURIComponent)
      .replace(/[()]/g, escape)

    var stringifiedAttributes = ''
    for (var attributeName in attributes) {
      if (!attributes[attributeName]) {
        continue
      }
      stringifiedAttributes += '; ' + attributeName
      if (attributes[attributeName] === true) {
        continue
      }

      // Considers RFC 6265 section 5.2:
      // ...
      // 3.  If the remaining unparsed-attributes contains a %x3B (";")
      //     character:
      // Consume the characters of the unparsed-attributes up to,
      // not including, the first %x3B (";") character.
      // ...
      stringifiedAttributes += '=' + attributes[attributeName].split(';')[0]
    }

    return (document.cookie = key + '=' + value + stringifiedAttributes)
  }

  function get (key, json) {
    if (typeof document === 'undefined') {
      return
    }

    var jar = {}
    // To prevent the for loop in the first place assign an empty array
    // in case there are no cookies at all.
    var cookies = document.cookie ? document.cookie.split('; ') : []
    var i = 0

    for (; i < cookies.length; i++) {
      var parts = cookies[i].split('=')
      var cookie = parts.slice(1).join('=')

      if (!json && cookie.charAt(0) === '"') {
        cookie = cookie.slice(1, -1)
      }

      try {
        var name = decode(parts[0])
        cookie = (converter.read || converter)(cookie, name) || decode(cookie)

        if (json) {
          try {
            cookie = JSON.parse(cookie)
          } catch (e) { }
        }

        jar[name] = cookie

        if (key === name) {
          break
        }
      } catch (e) { }
    }

    return key ? jar[key] : jar
  }

  api.set = set
  api.get = function (key) {
    return get(key, false /* read as raw */)
  }
  api.getJSON = function (key) {
    return get(key, true /* read as json */)
  }
  api.remove = function (key, attributes) {
    set(
      key,
      '',
      extend(attributes, {
        expires: -1
      })
    )
  }

  api.defaults = {}

  api.withConverter = init

  return api
}

export default init(function () { })