5 //  Created by Pawel Dabrowski on 30/05/2018.
 
   6 //  Copyright © 2018 Fundacja Nowoczesna Polska. All rights reserved.
 
  14     var appDelegate:AppDelegate {
 
  15         return UIApplication.shared.delegate as! AppDelegate
 
  18     func ebookExists(bookSlug: String) -> Bool {
 
  19         let path = FileType.ebook.pathForFileName(filename: bookSlug, bookSlug: bookSlug)
 
  21         return FileManager.default.fileExists(atPath: path)
 
  24     static func audiobookExists(audioBookUrlString: String, bookSlug: String) -> Bool {
 
  25         let fileName = (audioBookUrlString as NSString).lastPathComponent
 
  26         return FileManager.default.fileExists(atPath: FileType.audiobook.pathForFileName(filename: fileName, bookSlug: bookSlug))
 
  29     static func audiobookPathIfExists(audioBookUrlString: String, bookSlug: String) -> URL? {
 
  30         let fileName = (audioBookUrlString as NSString).lastPathComponent
 
  31         let path = FileType.audiobook.pathForFileName(filename: fileName, bookSlug: bookSlug)
 
  33         if FileManager.default.fileExists(atPath: path) {
 
  34             return URL(fileURLWithPath: path)