proteus-js-client/dist/frames/GroupFlyweight.js

Proteus JavaScript Client

/**
 * Copyright (c) 2017-present, Netifi Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * 
 */

'use strict';

/* eslint-disable consistent-return, no-bitwise */

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.encodeGroupFrame = encodeGroupFrame;
exports.decodeGroupFrame = decodeGroupFrame;

var _Frame = require('./Frame');

var _FrameHeaderFlyweight = require('./FrameHeaderFlyweight');

var _rsocketCore = require('rsocket-core');

var GROUP_LENGTH_SIZE = 4;
var METADATA_LENGTH_SIZE = 4;
var KEY_LENGTH_SIZE = 4;
var VALUE_LENGTH_SIZE = 4;

function encodeGroupFrame(frame) {
  var groupLength = _rsocketCore.UTF8Encoder.byteLength(frame.group);
  var metadataLength = _rsocketCore.BufferEncoder.byteLength(frame.metadata);
  var tagsLength = Object.entries(frame.tags).reduce(function (acc, _ref) {
    var key = _ref[0],
        value = _ref[1];

    var keyLength = _rsocketCore.UTF8Encoder.byteLength(key);
    var valueLength = _rsocketCore.UTF8Encoder.byteLength(value);
    return acc + KEY_LENGTH_SIZE + keyLength + VALUE_LENGTH_SIZE + valueLength;
  }, 0);

  var buffer = (0, _rsocketCore.createBuffer)(_FrameHeaderFlyweight.FRAME_HEADER_SIZE + GROUP_LENGTH_SIZE + groupLength + METADATA_LENGTH_SIZE + metadataLength + tagsLength);

  var offset = (0, _FrameHeaderFlyweight.encodeFrameHeader)(buffer, frame);

  offset = buffer.writeUInt32BE(groupLength, offset);
  offset = _rsocketCore.UTF8Encoder.encode(frame.group, buffer, offset, offset + groupLength);

  offset = buffer.writeUInt32BE(metadataLength, offset);
  offset = _rsocketCore.BufferEncoder.encode(frame.metadata, buffer, offset, offset + metadataLength);

  Object.entries(frame.tags).forEach(function (_ref2) {
    var key = _ref2[0],
        value = _ref2[1];

    var keyLength = _rsocketCore.UTF8Encoder.byteLength(key);
    var valueLength = _rsocketCore.UTF8Encoder.byteLength(value);

    offset = buffer.writeUInt32BE(keyLength, offset);
    offset = _rsocketCore.UTF8Encoder.encode(key, buffer, offset, offset + keyLength);

    offset = buffer.writeUInt32BE(valueLength, offset);
    offset = _rsocketCore.UTF8Encoder.encode(value, buffer, offset, offset + valueLength);
  });

  return buffer;
}

function decodeGroupFrame(buffer, majorVersion, minorVersion) {
  var offset = _FrameHeaderFlyweight.FRAME_HEADER_SIZE;

  var groupLength = buffer.readUInt32BE(offset);
  offset += GROUP_LENGTH_SIZE;

  var group = _rsocketCore.UTF8Encoder.decode(buffer, offset, offset + groupLength);
  offset += groupLength;

  var metadataLength = buffer.readUInt32BE(offset);
  offset += METADATA_LENGTH_SIZE;

  var metadata = _rsocketCore.BufferEncoder.decode(buffer, offset, offset + metadataLength);
  offset += metadataLength;

  var tags = {};
  while (offset < buffer.length) {
    var keyLength = buffer.readUInt32BE(offset);
    offset += KEY_LENGTH_SIZE;

    var key = _rsocketCore.UTF8Encoder.decode(buffer, offset, offset + keyLength);
    offset += keyLength;

    var valueLength = buffer.readUInt32BE(offset);
    offset += VALUE_LENGTH_SIZE;

    var value = _rsocketCore.UTF8Encoder.decode(buffer, offset, offset + valueLength);
    offset += valueLength;

    tags[key] = value;
  }

  return {
    type: _Frame.FrameTypes.GROUP,
    majorVersion: majorVersion,
    minorVersion: minorVersion,
    group: group,
    metadata: metadata,
    tags: tags
  };
}