Live Music & Generic Statuses

Changelog-Added: Added live music statuses
Changelog-Added: Added generic user statuses

damus/Components/Status/Music/MusicController.swift

@@ -0,0 +1,48 @@
+//
+//  MusicController.swift
+//  damus
+//
+//  Created by William Casarin on 2023-08-21.
+//
+import SwiftUI
+import MediaPlayer
+
+enum MusicState {
+    case playback_state(MPMusicPlaybackState)
+    case song(MPMediaItem?)
+}
+
+class MusicController {
+    let player: MPMusicPlayerController
+
+    let onChange: (MusicState) -> ()
+
+    init(onChange: @escaping (MusicState) -> ()) {
+        player = .systemMusicPlayer
+
+        player.beginGeneratingPlaybackNotifications()
+
+        self.onChange = onChange
+
+        print("Playback State: \(player.playbackState)")
+        print("Now Playing Item: \(player.nowPlayingItem?.title ?? "None")")
+
+        NotificationCenter.default.addObserver(self, selector: #selector(self.songChanged(notification:)), name: .MPMusicPlayerControllerNowPlayingItemDidChange, object: player)
+
+        NotificationCenter.default.addObserver(self, selector: #selector(self.playbackStatusChanged(notification:)), name: .MPMusicPlayerControllerPlaybackStateDidChange, object: player)
+    }
+
+    deinit {
+        print("deinit musiccontroller")
+    }
+
+    @objc
+    func songChanged(notification: Notification) {
+        onChange(.song(player.nowPlayingItem))
+    }
+
+    @objc
+    func playbackStatusChanged(notification: Notification) {
+        onChange(.playback_state(player.playbackState))
+    }
+}