class ChannelInfo: NSObject {

  var logo: String?
  var channelName: String?
  var id: NSNumber?


  init(logo: String, channelName: String , id: NSNumber) {

    self.logo = logo
    self.channelName = channelName
    self.id = id
  }

  init(resDictionary: [String:Any]) {

    logo = resDictionary["artwork_608x342"] as? String
    channelName = resDictionary["name"] as? String
    id = resDictionary["id"] as? NSNumber

  }


  static func updateAllChannels(completionHandler:@escaping (_ channels: [ChannelInfo]) -> Void){

    let nm = NetworkManager.sharedManager// singleton handles network connections and json parsing


    nm.getJSONData(urlExtension: "channels/all/0/50", completion: {
      data in

      var channels = [ChannelInfo]()

      if let jsonDictionary = nm.parseJSONFromData(data)
      {
        let resultsDictionaries = jsonDictionary["results"] as! [[String : Any]]
        for resultsDictionary in resultsDictionaries {// enumerate through dictionary
          let newChannel = ChannelInfo(resDictionary: resultsDictionary)
          channels.append(newChannel)
        }
      }
      completionHandler(channels)

    })
  }
}

var channelArray: [ChannelInfo] = []

      override func viewDidLoad() {
        channelArray = ChannelInfo.updateAllChannels(completionHandler: { _ in

        self.channelCollectionView.reloadData()
        })
    }