// Copyright © 2017 IBM Corp. All rights reserved.
// Copyright © 2011 Jason Smith, Jarrett Cruger and contributors
//
// 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';

// The changes_couchdb API

var feed = require('./lib/feed');
var stream = require('./lib/stream');

function follow_feed(opts, cb) {
  var ch_feed = new feed.Feed(opts);
  ch_feed.on('error', function(er) {
    return cb && cb.call(ch_feed, er);
  });
  ch_feed.on('change', function(ch) {
    return cb && cb.call(ch_feed, null, ch);
  });

  // Give the caller a chance to hook into any events.
  process.nextTick(function() {
    ch_feed.follow();
  });

  return ch_feed;
}

module.exports = follow_feed;
module.exports.Feed = feed.Feed;
module.exports.Changes = stream.Changes;
