First pass at Implementation of MusicKit as a Source

Sources/iTunes/Track+Song.swift

@@ -0,0 +1,117 @@
+//
+//  Track+Song.swift
+//
+//
+//  Created by Greg Bolsinga on 10/31/23.
+//
+
+import Foundation
+import MusicKit
+
+extension Track {
+  init(_ song: Song) {
+    //    let refinedSong = try await song.with([.albums], preferredSource: .library)
+
+    self.album = song.albumTitle
+    self.albumArtist = song.artistName
+    //      self.albumRating = album.rating
+    //      self.albumRatingComputed = song.isRatingComputed
+    self.artist = song.artistName
+    //      self.bitRate = song.bitrate
+    //      self.bPM = song.beatsPerMinute
+    //      self.comments = comments
+    //      self.compilation = album.isCompilation
+    self.composer = song.composerName
+    //      self.contentRating = contentRating
+    self.dateAdded = song.libraryAddedDate
+    //      self.dateModified = date
+    //      self.disabled = song.isUserDisabled
+    //      self.discCount = album.discCount
+    self.discNumber = song.discNumber
+    if let contentRating = song.contentRating, contentRating == .explicit {
+      self.explicit = true
+    }
+    self.genre = song.genreNames.first
+    //      self.grouping = grouping
+    //      self.hasVideo = true
+    //      self.kind = kind
+    //      self.location = location.absoluteString
+    //      self.movie = true
+    //      self.musicVideo = true
+    //      self.podcast = true
+    //      self.tVShow = true
+    self.name = song.title
+    //      self.partOfGaplessAlbum = album.isGapless
+    //
+    self.persistentID = UInt(song.id.rawValue) ?? 0
+    self.playCount = song.playCount
+    self.playDateUTC = song.lastPlayedDate
+    //      self.protected = song.isDRMProtected
+    //      self.purchased = song.isPurchased
+    //      self.rating = song.rating
+    //      self.ratingComputed = song.isRatingComputed
+    self.releaseDate = song.releaseDate
+    //    self.sampleRate = song.sampleRate
+    //    self.size = song.fileSize
+    //      self.skipCount = song.skipCount
+    //      self.skipDate = date
+    //      self.sortAlbum = name
+    //      self.sortAlbumArtist = name
+    //      self.sortArtist = name
+    //      self.sortComposer = sortComposer
+    //      self.sortName = sortName
+    if let duration = song.duration {
+      self.totalTime = Int(duration)
+    }
+    //
+    //    self.trackCount = album.trackCount
+    self.trackNumber = song.trackNumber
+    //      self.trackType = "File"
+    //      self.trackType = "URL"
+    //      self.trackType = "Remote"
+    //      self.unplayed = playStatus
+    //    self.year = song.year
+
+    //    if let videoInfo = song.videoInfo {
+    //      if let episode = videoInfo.episode {
+    //        self.episode = episode
+    //      }
+    //      if videoInfo.episodeOrder != 0 {
+    //        self.episodeOrder = videoInfo.episodeOrder
+    //      }
+    //      if videoInfo.isHD {
+    //        self.hD = videoInfo.isHD
+    //      }
+    //      if videoInfo.season != 0 {
+    //        self.season = videoInfo.season
+    //      }
+    //      if let series = videoInfo.series {
+    //        self.series = series
+    //      }
+    //      if let sortSeries = videoInfo.sortSeries {
+    //        self.sortSeries = sortSeries
+    //      }
+    //      if videoInfo.videoHeight != 0 {
+    //        self.videoHeight = videoInfo.videoHeight
+    //      }
+    //      if videoInfo.videoWidth != 0 {
+    //        self.videoWidth = videoInfo.videoWidth
+    //      }
+    //    }
+  }
+}
+
+extension Track {
+  static func requestAccess() async {
+    let musicAuthorizationStatus = await MusicAuthorization.request()
+    print("\(musicAuthorizationStatus)")
+  }
+
+  static public func gatherWithMusicKit() async throws -> [Track] {
+    await requestAccess()
+
+    let request = MusicLibraryRequest<Song>()
+    let response = try await request.response()
+    return response.items.map { Track($0) }
+  }
+}

Sources/tool/Track+Export.swift

@@ -11,7 +11,6 @@ import iTunes
 enum TrackExportError: Error {
   case noITunesTracks
   case cannotConvertJSONToString
-  case invalidSource
 }
 
 extension Source {
@@ -20,7 +19,7 @@ extension Source {
     case .itunes:
       return try Track.gatherAllTracks()
     case .musickit:
-      throw TrackExportError.invalidSource
+      return try await Track.gatherWithMusicKit()
     }
   }
 }