ActionMethods.swift

 @IBAction func didClickOnExploreButton(_ sender: NSButtonCell)
    {
        toggleViewStates(state: false)
        files = [String:Media]()
        switch sender.tag {
        case 101:
            getFilesFromDoucmentDir(type: .image)
        case 102:
            getFilesFromDoucmentDir(type: .video)
        case 103:
            getFilesFromDoucmentDir(type: .audio)
        case 104:
            getFilesFromDoucmentDir(type: .document)
        default:
            break
        }
    }

 @IBAction func didClickOnAddFileButton(_ sender: NSButton)
    {
        toggleViewStates(state: true)
        nothingFoundLabel.isHidden = true
        files = [String: Media]()
    }