datacite/bracco

import Transform from '@ember-data/serializer/transform';

export default Transform.extend({
  deserialize(serialized) {
    if (!serialized || serialized === 'xmlversiog==') {
      return null;
    } else {
      let xml = this.b64DecodeUnicode(serialized);
      return ['<hsh></hsh>', 'žée'].includes(xml) ? '' : xml;
    }
  },

  serialize(deserialized) {
    if (!deserialized) {
      return null;
    } else {
      return this.b64EncodeUnicode(deserialized);
    }
  },
  b64EncodeUnicode(str) {
    // first we use encodeURIComponent to get percent-encoded UTF-8,
    // then we convert the percent encodings into raw bytes which
    // can be fed into btoa.
    return btoa(
      encodeURIComponent(str).replace(
        /%([0-9A-F]{2})/g,
        function toSolidBytes(match, p1) {
          return String.fromCharCode('0x' + p1);
        }
      )
    );
  },
  b64DecodeUnicode(str) {
    try {
      // Going backwards: from bytestream, to percent-encoding, to original string.
      return decodeURIComponent(
        atob(str)
          .split('')
          .map(function (c) {
            return '%' + ('00' + c.charCodeAt(0).toString(16)).slice(-2);
          })
          .join('')
      );
    } catch (err) {
      return null;
    }
  }
});