import UIKit

protocol HasMeterAnimation {
    func animateMeter(scrollableView: UIScrollView)
}

func animateMeter(scrollableView: UIScrollView) {

    let maxYPosTableview = scrollableView.frame.height + scrollableView.frame.origin.y
    let progressBarRect = self.progressBar.frame
    let rectOfProgressBarInParentView =  self.convert(progressBarRect, to: scrollableView.superview)
    let maxYPosMeter = rectOfProgressBarInParentView.origin.y + progressBarRect.height

    if maxYPosTableview > maxYPosMeter {
        if progressBar.isHidden == false {
            progressBar.animateProgressBar()
            model.shouldMeterAnimate = false
        }
    }
}

protocol HasMeterAnimation {

        @IBOutlet var progressBar:AnimatedProgressBar! { get set }
        var model: ListItem! { get set }

        func animateMeter(scrollableView: UIScrollView)
    }

extension HasMeterAnimation {

            func animateMeter(scrollableView: UIScrollView) {

                let maxYPosTableview = scrollableView.frame.height + scrollableView.frame.origin.y
                let progressBarRect = self.progressBar.frame
                let rectOfProgressBarInParentView =  self.convert(progressBarRect, to: scrollableView.superview)
                let maxYPosMeter = rectOfProgressBarInParentView.origin.y + progressBarRect.height

                if maxYPosTableview > maxYPosMeter {
                    if progressBar.isHidden == false {
                        progressBar.animateProgressBar()
                        model.shouldMeterAnimate = false
                    }
                }
            }