From 5f4a3c8a0aeb592a7ba991d15ec0f12d95726dc7 Mon Sep 17 00:00:00 2001
From: Kenneth <kennethnym@outlook.com>
Date: Sun, 28 Jul 2024 15:12:10 +0100
Subject: [PATCH] feat: add playback loading state

---
 .../xcschemes/InfinifiIOS.xcscheme            | 78 +++++++++++++++++++
 .../xcschemes/xcschememanagement.plist        | 14 ----
 InfinifiIOS/ContentView.swift                 |  3 +
 InfinifiIOS/PlaybackManager.swift             | 39 +++++++---
 4 files changed, 110 insertions(+), 24 deletions(-)
 create mode 100644 InfinifiIOS.xcodeproj/xcshareddata/xcschemes/InfinifiIOS.xcscheme
 delete mode 100644 InfinifiIOS.xcodeproj/xcuserdata/kennethng.xcuserdatad/xcschemes/xcschememanagement.plist

diff --git a/InfinifiIOS.xcodeproj/xcshareddata/xcschemes/InfinifiIOS.xcscheme b/InfinifiIOS.xcodeproj/xcshareddata/xcschemes/InfinifiIOS.xcscheme
new file mode 100644
index 0000000..098968e
--- /dev/null
+++ b/InfinifiIOS.xcodeproj/xcshareddata/xcschemes/InfinifiIOS.xcscheme
@@ -0,0 +1,78 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1540"
+   version = "1.7">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES"
+      buildArchitectures = "Automatic">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "F138396B2C51BABD00B4814F"
+               BuildableName = "InfinifiIOS.app"
+               BlueprintName = "InfinifiIOS"
+               ReferencedContainer = "container:InfinifiIOS.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      shouldAutocreateTestPlan = "YES">
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "F138396B2C51BABD00B4814F"
+            BuildableName = "InfinifiIOS.app"
+            BlueprintName = "InfinifiIOS"
+            ReferencedContainer = "container:InfinifiIOS.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "F138396B2C51BABD00B4814F"
+            BuildableName = "InfinifiIOS.app"
+            BlueprintName = "InfinifiIOS"
+            ReferencedContainer = "container:InfinifiIOS.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>
diff --git a/InfinifiIOS.xcodeproj/xcuserdata/kennethng.xcuserdatad/xcschemes/xcschememanagement.plist b/InfinifiIOS.xcodeproj/xcuserdata/kennethng.xcuserdatad/xcschemes/xcschememanagement.plist
deleted file mode 100644
index 4b77bca..0000000
--- a/InfinifiIOS.xcodeproj/xcuserdata/kennethng.xcuserdatad/xcschemes/xcschememanagement.plist
+++ /dev/null
@@ -1,14 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
-<plist version="1.0">
-<dict>
-	<key>SchemeUserState</key>
-	<dict>
-		<key>InfinifiIOS.xcscheme_^#shared#^_</key>
-		<dict>
-			<key>orderHint</key>
-			<integer>0</integer>
-		</dict>
-	</dict>
-</dict>
-</plist>
diff --git a/InfinifiIOS/ContentView.swift b/InfinifiIOS/ContentView.swift
index df85abd..d887f64 100644
--- a/InfinifiIOS/ContentView.swift
+++ b/InfinifiIOS/ContentView.swift
@@ -10,6 +10,8 @@ struct ContentView: View {
             playbackManager.stop()
         case .paused:
             playbackManager.nextTrack()
+        default:
+            break
         }
     }
 
@@ -17,6 +19,7 @@ struct ContentView: View {
         let buttonImageName = switch playbackManager.playbackState {
         case .paused: "play"
         case .playing: "pause"
+        case .loading: "dot.square"
         }
 
         VStack(alignment: .center) {
diff --git a/InfinifiIOS/PlaybackManager.swift b/InfinifiIOS/PlaybackManager.swift
index aa7a7d8..4b56ef4 100644
--- a/InfinifiIOS/PlaybackManager.swift
+++ b/InfinifiIOS/PlaybackManager.swift
@@ -4,8 +4,10 @@ import Foundation
 enum PlaybackState {
     case playing
     case paused
+    case loading
 }
 
+@MainActor
 class PlaybackManager: ObservableObject {
     @Published var playbackState: PlaybackState = .paused
     @Published var hasError = false
@@ -13,20 +15,37 @@ class PlaybackManager: ObservableObject {
     private var audioPlayer = AVPlayer()
 
     func nextTrack() {
-        let now = Date().timeIntervalSince1970
-        // add timestamp to the url to prevent caching
-        let playerItem = AVPlayerItem(url: URL(string: "https://infinifi.cafe/current.mp3?t=\(now)")!)
-        NotificationCenter.default.addObserver(self, selector: #selector(playbackFinished), name: AVPlayerItem.didPlayToEndTimeNotification, object: playerItem)
-
-        audioPlayer.replaceCurrentItem(with: playerItem)
-        audioPlayer.play()
-
-        playbackState = .playing
+        playbackState = .loading
+        Task {
+            try await loadCurrentTrack()
+            playbackState = .playing
+        }
     }
 
     func stop() {
-        audioPlayer.pause()
         playbackState = .paused
+        audioPlayer.pause()
+    }
+
+    private nonisolated func loadCurrentTrack() async throws {
+        let now = Date().timeIntervalSince1970
+        guard let url = URL(string: "https://infinifi.cafe/current.mp3?t=\(now)") else {
+            return
+        }
+
+        // add timestamp to the url to prevent caching
+        let asset = AVAsset(url: url)
+        let isPlayable = try await asset.load(.isPlayable)
+        guard isPlayable else {
+            return
+        }
+
+        let playerItem = AVPlayerItem(asset: asset)
+
+        NotificationCenter.default.addObserver(self, selector: #selector(playbackFinished), name: AVPlayerItem.didPlayToEndTimeNotification, object: playerItem)
+
+        await audioPlayer.replaceCurrentItem(with: playerItem)
+        await audioPlayer.play()
     }
 
     @objc