Changed MusicController to singleton and added NotificationCenter functionality to listen for playback state changes in Apple Music. Now changes in Apple Music app are reflected on PineTime interface.

Author: xan-m

InfiniLink/BLE/BLEUpdateHandler.swift

@@ -32,7 +32,7 @@ struct BLEUpdatedCharacteristicHandler {
 		switch characteristic.uuid {
 		case bleManager.cbuuidList.musicControl:
 			let musicControl = [UInt8](characteristic.value!)
-			MusicController().controlMusic(controlNumber: Int(musicControl[0]))
+			MusicController.shared.controlMusic(controlNumber: Int(musicControl[0]))
 		case bleManager.cbuuidList.hrm:
 			let bpm = heartRate(from: characteristic)
 			bleManager.heartBPM = Double(bpm)

InfiniLink/Music/MusicController.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 import MediaPlayer
+import NotificationCenter
 
 class MusicController {
 	/*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*
@@ -16,7 +17,7 @@ class MusicController {
 
 	TODO: figure out the formatting that PineTime expects for time elapsed/total time. Hex value of 0101 = 12:32, 0102 = 04:48. Writing decimal does nothing. ASCII also gives wacky results
 	*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*/
-	
+	static let shared = MusicController()
 	let bleManager = BLEManager.shared
 
 	var musicPlayer = MPMusicPlayerController.systemMusicPlayer
@@ -32,6 +33,15 @@ class MusicController {
 	enum musicState {
 		case play, pause, nextTrack, prevTrack
 	}
+	init() {
+		musicPlayer.beginGeneratingPlaybackNotifications()
+		NotificationCenter.default.addObserver(self, selector: #selector(self.onNotificationReceipt(_:)), name: .MPMusicPlayerControllerPlaybackStateDidChange, object: nil)
+	}
+	
+	@objc func onNotificationReceipt(_ notification: Notification) {
+		musicPlaying = musicPlayer.playbackState.rawValue
+		updateMusicInformation(songInfo: getCurrentSongInfo())
+	}
 
 	func controlMusic(controlNumber: Int) {