PlaylistModel.swift 3.3 KB

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  1. /*****************************************************************************
  2. * PlaylistModel.swift
  3. *
  4. * Copyright © 2018 VLC authors and VideoLAN
  5. * Copyright © 2018 Videolabs
  6. *
  7. * Authors: Soomin Lee <bubu@mikan.io>
  8. *
  9. * Refer to the COPYING file of the official project for license.
  10. *****************************************************************************/
  11. class PlaylistModel: MLBaseModel {
  12. typealias MLType = VLCMLPlaylist
  13. var sortModel = SortModel([.alpha, .duration])
  14. var updateView: (() -> Void)?
  15. var files = [VLCMLPlaylist]()
  16. var cellType: BaseCollectionViewCell.Type { return MovieCollectionViewCell.self }
  17. var medialibrary: MediaLibraryService
  18. var indicatorName: String = NSLocalizedString("PLAYLISTS", comment: "")
  19. required init(medialibrary: MediaLibraryService) {
  20. self.medialibrary = medialibrary
  21. medialibrary.addObserver(self)
  22. files = medialibrary.playlists()
  23. }
  24. func append(_ item: VLCMLPlaylist) {
  25. for file in files {
  26. if file.identifier() == item.identifier() {
  27. return
  28. }
  29. }
  30. files.append(item)
  31. }
  32. func delete(_ items: [VLCMLObject]) {
  33. for playlist in items where playlist is VLCMLPlaylist {
  34. if !(medialibrary.deletePlaylist(with: playlist.identifier())) {
  35. assertionFailure("PlaylistModel: Failed to delete playlist: \(playlist.identifier())")
  36. }
  37. }
  38. }
  39. // Creates a VLCMLPlaylist appending it and updates linked view
  40. func create(name: String) {
  41. guard let playlist = medialibrary.createPlaylist(with: name) else {
  42. assertionFailure("PlaylistModel: create: Failed to create a playlist.")
  43. return
  44. }
  45. append(playlist)
  46. updateView?()
  47. }
  48. }
  49. // MARK: - Sort
  50. extension PlaylistModel {
  51. func sort(by criteria: VLCMLSortingCriteria) {
  52. files = medialibrary.playlists(sortingCriteria: criteria)
  53. sortModel.currentSort = criteria
  54. updateView?()
  55. }
  56. }
  57. // MARK: - Edit
  58. extension PlaylistModel: EditableMLModel {
  59. func editCellType() -> BaseCollectionViewCell.Type {
  60. return MediaEditCell.self
  61. }
  62. }
  63. // MARK: - MediaLibraryObserver
  64. extension PlaylistModel: MediaLibraryObserver {
  65. func medialibrary(_ medialibrary: MediaLibraryService, didAddPlaylists playlists: [VLCMLPlaylist]) {
  66. playlists.forEach({ append($0) })
  67. updateView?()
  68. }
  69. func medialibrary(_ medialibrary: MediaLibraryService, didDeletePlaylistsWithIds playlistsIds: [NSNumber]) {
  70. files = files.filter() {
  71. for id in playlistsIds where $0.identifier() == id.int64Value {
  72. return false
  73. }
  74. return true
  75. }
  76. updateView?()
  77. }
  78. }
  79. // MARK: - Helpers
  80. extension VLCMLPlaylist {
  81. func numberOfTracksString() -> String {
  82. let mediaCount = media?.count ?? 0
  83. let tracksString = mediaCount > 1 ? NSLocalizedString("TRACKS", comment: "") : NSLocalizedString("TRACK", comment: "")
  84. return String(format: tracksString, mediaCount)
  85. }
  86. }
  87. extension VLCMLPlaylist: MediaCollectionModel {
  88. func sortModel() -> SortModel? {
  89. return nil
  90. }
  91. func files() -> [VLCMLMedia]? {
  92. return media
  93. }
  94. func title() -> String? {
  95. return name
  96. }
  97. }