PlaylistModel.swift 4.2 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. // Update directly the UI without waiting the delegate to avoid showing 'ghost' items
  39. filterFilesFromDeletion(of: items)
  40. updateView?()
  41. }
  42. // Creates a VLCMLPlaylist appending it and updates linked view
  43. func create(name: String) {
  44. guard let playlist = medialibrary.createPlaylist(with: name) else {
  45. assertionFailure("PlaylistModel: create: Failed to create a playlist.")
  46. return
  47. }
  48. append(playlist)
  49. updateView?()
  50. }
  51. }
  52. // MARK: - Sort
  53. extension PlaylistModel {
  54. func sort(by criteria: VLCMLSortingCriteria, desc: Bool) {
  55. files = medialibrary.playlists(sortingCriteria: criteria, desc: desc)
  56. sortModel.currentSort = criteria
  57. sortModel.desc = desc
  58. updateView?()
  59. }
  60. }
  61. // MARK: - Search
  62. extension VLCMLPlaylist: SearchableMLModel {
  63. func contains(_ searchString: String) -> Bool {
  64. return name.lowercased().contains(searchString)
  65. }
  66. }
  67. // MARK: - MediaLibraryObserver
  68. extension PlaylistModel: MediaLibraryObserver {
  69. func medialibrary(_ medialibrary: MediaLibraryService, didAddPlaylists playlists: [VLCMLPlaylist]) {
  70. playlists.forEach({ append($0) })
  71. updateView?()
  72. }
  73. func medialibrary(_ medialibrary: MediaLibraryService,
  74. didModifyPlaylistsWithIds playlistsIds: [NSNumber]) {
  75. var playlists = [VLCMLPlaylist]()
  76. playlistsIds.forEach() {
  77. guard let safePlaylist = medialibrary.medialib.playlist(withIdentifier: $0.int64Value)
  78. else {
  79. return
  80. }
  81. playlists.append(safePlaylist)
  82. }
  83. files = swapModels(with: playlists)
  84. updateView?()
  85. }
  86. func medialibrary(_ medialibrary: MediaLibraryService, didDeletePlaylistsWithIds playlistsIds: [NSNumber]) {
  87. files = files.filter() {
  88. for id in playlistsIds where $0.identifier() == id.int64Value {
  89. return false
  90. }
  91. return true
  92. }
  93. updateView?()
  94. }
  95. }
  96. // MARK: - Helpers
  97. extension VLCMLPlaylist {
  98. func numberOfTracksString() -> String {
  99. let mediaCount = media?.count ?? 0
  100. let tracksString = mediaCount > 1 ? NSLocalizedString("TRACKS", comment: "") : NSLocalizedString("TRACK", comment: "")
  101. return String(format: tracksString, mediaCount)
  102. }
  103. func accessibilityText() -> String? {
  104. return name + " " + numberOfTracksString()
  105. }
  106. }
  107. extension VLCMLPlaylist: MediaCollectionModel {
  108. func sortModel() -> SortModel? {
  109. return nil
  110. }
  111. func files(with criteria: VLCMLSortingCriteria = .alpha,
  112. desc: Bool = false) -> [VLCMLMedia]? {
  113. return media
  114. }
  115. func title() -> String {
  116. return name
  117. }
  118. }