encodeBundle method

@override Map<String, Object> encodeBundle(EncryptedBundle bundle, ID receiver)

Encode key data

bundle is the encrypted key data with targets (ID terminals). receiver is the user ID.

Returns encoded key data with targets (ID + terminals).

Implementation

@override
Map<String, Object> encodeBundle(EncryptedBundle bundle, ID receiver) {
  //
  //  0. ID string without terminal
  //
  assert(receiver.terminal == null, 'ID should not contain terminal here: $receiver');
  final String identifier = receiver.withoutTerminal().toString();
  final Map<String, Object> encodedKeys = {};
  String target;
  final Map<String, Uint8List> map = bundle.toMap();
  map.forEach((key, value) {
    target = key;
    //
    //  1. check target
    //
    if (target.isEmpty || target == '/') {
      // Naked ID
      target = identifier;
    } else if (target.startsWith('/')) {
      assert(false, 'entry error: $key -> $value');
      target = identifier + target;
    } else {
      // Dressed ID
      target = '$identifier/$target';
    }
    //
    //  2. encode data (base64)
    //
    final ted = TransportableData.create(value);
    assert(ted.isNotEmpty, 'failed to encode data: $value');
    //
    //  3. insert to 'message.keys' with ID + terminal
    //
    encodedKeys[target] = ted.serialize();
  });
  // OK
  return encodedKeys;
}