TableViewMultiView.swift

import PureLayout

class TableViewMultiView : UIView {
  
  var didLoadView = false
  
  let tableView : UITableView = {
    let tableView = UITableView.newAutoLayoutView()
    tableView.keyboardDismissMode = .OnDrag
    tableView.separatorInset.right = tableView.separatorInset.left
    tableView.separatorColor = UIColor(rgba: "#D8D8D8")
    tableView.hidden = true
    tableView.tableFooterView = UIView(frame: CGRectZero)
    return tableView
  }()
  
  let refreshControl : UIRefreshControl = {
    let refreshControl = UIRefreshControl()
    refreshControl.tintColor = UIColor(rgba:"#00ADDF")
    refreshControl.backgroundColor = UIColor(rgba: "#EDEDED")
    refreshControl.attributedTitle = NSAttributedString(string: "pull_to_refresh".localized,
      attributes: [NSForegroundColorAttributeName: UIColor(rgba: "#00ADDF")])
    return refreshControl
  }()

  
  let warningView : UILabel = {
    let warningView = UILabel.newAutoLayoutView()
    warningView.lineBreakMode = .ByWordWrapping
    warningView.numberOfLines = 0
    warningView.textAlignment = .Center
    warningView.font = warningView.font.fontWithSize(14)
    warningView.textColor = UIColor(rgba: "#3A3D3F")
    warningView.backgroundColor = UIColor.whiteColor()
    warningView.opaque = true
    warningView.hidden = true
    return warningView
  }()
  
  let actionButton : UIButton = {
    let actionButton = UIButton.newAutoLayoutView()
    actionButton.backgroundColor = UIColor(rgba: "#5BC9F3")
    actionButton.setTitleColor(UIColor.whiteColor(), forState: UIControlState.Normal)
    actionButton.titleLabel!.font = actionButton.titleLabel!.font.fontWithSize(14)
    actionButton.contentEdgeInsets = UIEdgeInsets(top: 10, left: 10, bottom: 10, right: 10)
    actionButton.layer.cornerRadius = 5
    actionButton.hidden = true
    return actionButton
  }()
  
  let loadingView : UIActivityIndicatorView = {
    let loadingView = UIActivityIndicatorView.newAutoLayoutView()
    loadingView.color = UIColor(rgba: "#00ADDF")
    loadingView.startAnimating()
    return loadingView
  }()
  
  override init(frame: CGRect) {
    super.init(frame: frame)
    backgroundColor = UIColor.whiteColor()
    self.addSubview(loadingView)
    self.addSubview(actionButton)
    self.addSubview(warningView)
    self.addSubview(tableView)
    self.tableView.addSubview(refreshControl)
    self.setNeedsUpdateConstraints()
    self.updateConstraintsIfNeeded()
  }

  required init?(coder aDecoder: NSCoder) {
      fatalError("init(coder:) has not been implemented")
  }
  
  override func updateConstraintsIfNeeded() {
    if !didLoadView {
      tableView.autoPinEdgesToSuperviewEdges()
      warningView.autoPinEdgeToSuperviewEdge(.Left)
      warningView.autoPinEdgeToSuperviewEdge(.Right)
      warningView.autoAlignAxis(.Horizontal, toSameAxisOfView: self)
      actionButton.autoPinEdge(.Top, toEdge: .Bottom, ofView: warningView, withOffset: 16.0)
      actionButton.autoAlignAxis(.Vertical, toSameAxisOfView: self)
      loadingView.autoCenterInSuperview()
      didLoadView = true
    }
    super.updateConstraintsIfNeeded()
  }
  
  func showLoading() {
    loadingView.startAnimating()
    loadingView.hidden = false
    tableView.hidden = true
    warningView.hidden = true
    actionButton.hidden = true
  }
  
  func reloadData() {
    if self.refreshControl.refreshing {
      self.refreshControl.endRefreshing()
    }
    tableView.reloadData()
    tableView.hidden = false
    warningView.hidden = true
    actionButton.hidden = true
    loadingView.hidden = true
    loadingView.stopAnimating()
  }
  
  func showWarning(warning: String) {
    tableView.hidden = true
    warningView.hidden = false
    warningView.text = warning
    actionButton.hidden = true
    loadingView.hidden = true
    loadingView.stopAnimating()
  }
  
  func showError(target: AnyObject?, text: String, actionButtonText: String, actionButtonMethod: Selector) {
    tableView.hidden = true
    warningView.hidden = false
    warningView.text = text
    actionButton.hidden = false
    actionButton.setTitle(actionButtonText, forState: .Normal)
    actionButton.addTarget(target, action: actionButtonMethod, forControlEvents: .TouchUpInside)
    loadingView.hidden = true
    loadingView.stopAnimating()
  }
  
  func setTarget(target: AnyObject?, action: Selector) {
    self.refreshControl.addTarget(target, action: action, forControlEvents: UIControlEvents.ValueChanged)
  }
  
}