feat(example): Universal App (#86)

Example/SwiftAudio/PlayerView.swift

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+//
+//  PlayerView.swift
+//  SwiftAudio
+//
+//  Created by Brandon Sneed on 3/30/24.
+//
+
+import SwiftUI
+import SwiftAudioEx
+
+struct PlayerView: View {
+    @ObservedObject var viewModel: ViewModel
+    @State private var showingQueue = false
+
+    let controller = AudioController.shared
+
+    init(viewModel: PlayerView.ViewModel = ViewModel()) {
+        self.viewModel = viewModel
+    }
+
+    var body: some View {
+        VStack(spacing: 0) {
+            HStack(alignment: .center) {
+                Spacer()
+                Button(action: { showingQueue.toggle() }, label: {
+                    Text("Queue")
+                        .fontWeight(.bold)
+                })
+            }
+
+            if let image = viewModel.artwork {
+#if os(macOS)
+                Image(nsImage: image)
+                    .resizable()
+                    .scaledToFit()
+                    .frame(width: 240, height: 240)
+                    .padding(.top, 30)
+#elseif os(iOS)
+                Image(uiImage: image)
+                    .resizable()
+                    .scaledToFit()
+                    .frame(width: 240, height: 240)
+                    .padding(.top, 30)
+#endif
+            } else {
+                AsyncImage(url: nil)
+                    .frame(width: 240, height: 240)
+                    .padding(.top, 30)
+            }
+
+            VStack(spacing: 4) {
+                Text(viewModel.title)
+                    .fontWeight(.semibold)
+                    .font(.system(size: 18))
+                Text(viewModel.artist)
+                    .fontWeight(.thin)
+            }
+            .padding(.top, 30)
+
+            if viewModel.maxTime > 0 {
+                VStack {
+                    Slider(value: $viewModel.position, in: 0...viewModel.maxTime) { editing in
+                        viewModel.isScrubbing = editing
+                        print("scrubbing = \(viewModel.isScrubbing)")
+                        if viewModel.isScrubbing == false {
+                            controller.player.seek(to: viewModel.position)
+                        }
+                    }
+                    HStack {
+                        Text(viewModel.elapsedTime)
+                            .font(.system(size: 14))
+                        Spacer()
+                        Text(viewModel.remainingTime)
+                            .font(.system(size: 14))
+                    }
+                }
+                .padding(.top, 25)
+            } else {
+                Text("Live Stream")
+                    .padding(.top, 35)
+            } 
+
+            HStack {
+                Button(action: controller.player.previous, label: {
+                    Text("Prev")
+                        .font(.system(size: 14))
+                })
+                .frame(maxWidth: .infinity)
+
+                Button(action: {
+                    if viewModel.playing {
+                        controller.player.pause()
+                    } else {
+                        controller.player.play()
+                    }
+                }, label: {
+                    Text(!viewModel.playWhenReady || viewModel.playbackState == .failed ? "Play" : "Pause")
+                        .font(.system(size: 18))
+                        .fontWeight(.semibold)
+                })
+
+                .frame(maxWidth: .infinity)
+                Button(action: controller.player.next, label: {
+                    Text("Next")
+                        .font(.system(size: 14))
+                })
+                .frame(maxWidth: .infinity)
+            }
+            .padding(.top, 80)
+
+            VStack {
+                if viewModel.playbackState == .failed {
+                    Text("Playback failed.")
+                        .font(.system(size: 14))
+                        .foregroundStyle(.red)
+                        .padding(.top, 20)
+                } else if (viewModel.playbackState == .loading || viewModel.playbackState == .buffering) && viewModel.playWhenReady {
+                    ProgressView()
+                        .progressViewStyle(.circular)
+                        .controlSize(.small)
+                        .padding(.top, 20)
+                }
+            }
+
+            Spacer()
+        }
+        .sheet(isPresented: $showingQueue) {
+            QueueView()
+#if os(macOS)
+                .frame(width: 300, height: 400)
+#endif
+        }
+        .padding(.horizontal, 16)
+        .padding(.top)
+    }
+}
+
+#Preview("Standard") {
+    let viewModel = PlayerView.ViewModel()
+    viewModel.title = "Longing"
+    viewModel.artist = "David Chavez"
+
+    return PlayerView(viewModel: viewModel)
+}
+
+#Preview("Error") {
+    let viewModel = PlayerView.ViewModel()
+    viewModel.title = "Longing"
+    viewModel.artist = "David Chavez"
+    viewModel.playbackState = .failed
+
+    return PlayerView(viewModel: viewModel)
+}
+
+#Preview("Buffering") {
+    let viewModel = PlayerView.ViewModel()
+    viewModel.title = "Longing"
+    viewModel.artist = "David Chavez"
+    viewModel.playbackState = .buffering
+    viewModel.playWhenReady = true
+
+    return PlayerView(viewModel: viewModel)
+}
+
+#Preview("Live Stream") {
+    let viewModel = PlayerView.ViewModel()
+    viewModel.title = "Longing"
+    viewModel.artist = "David Chavez"
+    viewModel.maxTime = 0
+
+    return PlayerView(viewModel: viewModel)
+}

Example/SwiftAudio/PlayerViewModel.swift

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+//
+//  PlayerViewModel.swift
+//  SwiftAudio
+//
+//  Created by David Chavez on 4/12/24.
+//
+
+import SwiftAudioEx
+
+#if os(macOS)
+import AppKit
+public typealias NativeImage = NSImage
+#elseif os(iOS)
+import UIKit
+public typealias NativeImage = UIImage
+#endif
+
+extension PlayerView {
+    final class ViewModel: ObservableObject {
+        // MARK: - Observables
+
+        @Published var playing: Bool = false
+        @Published var position: Double = 0
+        @Published var artwork: NativeImage? = nil
+        @Published var title: String = ""
+        @Published var artist: String = ""
+        @Published var maxTime: TimeInterval = 100
+        @Published var isScrubbing: Bool = false
+        @Published var elapsedTime: String = "00:00"
+        @Published var remainingTime: String = "00:00"
+
+        @Published var playWhenReady: Bool = false
+        @Published var playbackState: AudioPlayerState = .idle
+
+        // MARK: - Properties
+
+        let controller = AudioController.shared
+
+        // MARK: - Initializer
+
+        init() {
+            controller.player.event.playWhenReadyChange.addListener(self, handlePlayWhenReadyChange)
+            controller.player.event.stateChange.addListener(self, handleAudioPlayerStateChange)
+            controller.player.event.playbackEnd.addListener(self, handleAudioPlayerPlaybackEnd(data:))
+            controller.player.event.secondElapse.addListener(self, handleAudioPlayerSecondElapsed)
+            controller.player.event.seek.addListener(self, handleAudioPlayerDidSeek)
+            controller.player.event.updateDuration.addListener(self, handleAudioPlayerUpdateDuration)
+            controller.player.event.didRecreateAVPlayer.addListener(self, handleAVPlayerRecreated)
+        }
+
+        // MARK: - Updates
+
+        private func render() {
+            DispatchQueue.main.async { [weak self] in
+                guard let self else { return }
+                playing = (controller.player.playerState == .playing)
+                playbackState = controller.player.playerState
+                playWhenReady = controller.player.playWhenReady
+                position = controller.player.currentTime
+                maxTime = controller.player.duration
+                artist = controller.player.currentItem?.getArtist() ?? ""
+                title = controller.player.currentItem?.getTitle() ?? ""
+                elapsedTime = controller.player.currentTime.secondsToString()
+                remainingTime = (controller.player.duration - controller.player.currentTime).secondsToString()
+                if let item = controller.player.currentItem as? DefaultAudioItem {
+                    artwork = item.artwork
+                } else {
+                    artwork = nil
+                }
+            }
+        }
+
+        private func renderTimes() {
+            DispatchQueue.main.async { [weak self] in
+                guard let self else { return }
+                position = controller.player.currentTime
+                maxTime = controller.player.duration
+                elapsedTime = controller.player.currentTime.secondsToString()
+                remainingTime = (controller.player.duration - controller.player.currentTime).secondsToString()
+                print(elapsedTime)
+            }
+        }
+
+        // MARK: - AudioPlayer Event Handlers
+
+        func handleAudioPlayerStateChange(data: AudioPlayer.StateChangeEventData) {
+            print("state=\(data)")
+            render()
+        }
+
+        func handlePlayWhenReadyChange(data: AudioPlayer.PlayWhenReadyChangeData) {
+            print("playWhenReady=\(data)")
+            render()
+        }
+
+        func handleAudioPlayerPlaybackEnd(data: AudioPlayer.PlaybackEndEventData) {
+            print("playEndReason=\(data)")
+        }
+
+        func handleAudioPlayerSecondElapsed(data: AudioPlayer.SecondElapseEventData) {
+            if !isScrubbing {
+                renderTimes()
+            }
+        }
+
+        func handleAudioPlayerDidSeek(data: AudioPlayer.SeekEventData) {
+            // .. don't need this
+        }
+
+        func handleAudioPlayerUpdateDuration(data: AudioPlayer.UpdateDurationEventData) {
+            if !isScrubbing {
+                renderTimes()
+            }
+        }
+
+        func handleAVPlayerRecreated() {
+            // .. don't need this
+        }
+    }
+}

Example/SwiftAudio/QueueView.swift

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+//
+//  QueueView.swift
+//  SwiftAudio
+//
+//  Created by David Chavez on 4/12/24.
+//
+
+import SwiftUI
+import SwiftAudioEx
+
+struct QueueView: View {
+    let controller = AudioController.shared
+    @Environment(\.dismiss) var dismiss
+
+    var body: some View {
+        NavigationStack {
+            VStack {
+                List {
+                    if controller.player.currentItem != nil {
+                        Section(header: Text("Playing Now")) {
+                            QueueItemView(
+                                title: controller.player.currentItem?.getTitle() ?? "",
+                                artist: controller.player.currentItem?.getArtist() ?? ""
+                            )
+                        }
+                    }
+                    Section(header: Text("Up Next")) {
+                        ForEach(controller.player.nextItems as! [DefaultAudioItem]) { item in
+                            QueueItemView(
+                                title: item.getTitle() ?? "",
+                                artist: item.getArtist() ?? ""
+                            )
+                        }
+                    }
+                }
+            }
+            .navigationTitle("Queue")
+            .toolbar {
+                Button("Close") {
+                    dismiss()
+                }
+            }
+        }
+    }
+}
+
+struct QueueItemView: View {
+    let title: String
+    let artist: String
+
+    var body: some View {
+        VStack(alignment: .leading) {
+            Text(title)
+                .fontWeight(.semibold)
+            Text(artist)
+                .fontWeight(.light)
+        }
+    }
+}
+
+
+#Preview {
+    QueueView()
+}
+

Example/SwiftAudio/SwiftAudioApp.swift

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+//
+//  SwiftAudioApp.swift
+//  SwiftAudio
+//
+//  Created by Brandon Sneed on 3/30/24.
+//
+
+import SwiftUI
+
+@main
+struct SwiftAudioApp: App {
+    var body: some Scene {
+        WindowGroup {
+            PlayerView()
+        }
+    }
+}