cookies.js

/*jshint asi:true, browser:true */

define(function (require, exports) {

  var extend = function (obj) {
    each(slice.call(arguments, 1), function (source) {
      for (var prop in source) {
        obj[prop] = source[prop]
      }
    })
    return obj
  }

  var cookie = function (key, value, options) {

    if (arguments.length > 1 && (!/Object/.test(Object.prototype.toString.call(value)) || value === null || value === undefined)) {
      options = extend({}, options)

      if (value === null || value === undefined) {
        options.expires = -1
      }

      if (typeof options.expires === 'number') {
        var days = options.expires
        var t = options.expires = new Date()
        t.setDate(t.getDate() + days)
      }

      value = String(value)

      return (document.cookie = [
          encodeURIComponent(key), '=', options.raw ? value : encodeURIComponent(value),
          options.expires ? '; expires=' + options.expires.toUTCString() : '', // use expires attribute, max-age is not supported by IE
          options.path ? '; path=' + options.path : '',
          options.domain ? '; domain=' + options.domain : '',
          options.secure ? '; secure' : ''
        ].join(''))
    }

    // key and possibly options given, get cookie...
    options = value || {}
    var decode = options.raw ? function (s) {
        return s
      } : decodeURIComponent

    var pairs = document.cookie.split('; ')
    for (var i = 0, pair; i < pairs.length; i++) {
      pair = pairs[i].split('=')
      if (decode(pair[0]) === key) {
        // IE saves cookies with empty string as "c; ", e.g. without "=" as opposed to EOMB, thus pair[1] may be undefined
        return decode(pair[1] || '')
      }
    }

    return null

  }

  exports = cookies

})