From 6d8ea7bf52842689e726eaeaa32475daba5a8a68 Mon Sep 17 00:00:00 2001
From: Fishcake <me@fshck.com>
Date: Tue, 26 Sep 2023 15:43:02 +0900
Subject: [PATCH] add indicator to show user if the stream is live or on-demand

---
 damus/Views/Video/DamusVideoPlayer.swift      | 24 +++++++++++++++++++
 .../Video/DamusVideoPlayerViewModel.swift     | 16 +++++++++++++
 2 files changed, 40 insertions(+)

diff --git a/damus/Views/Video/DamusVideoPlayer.swift b/damus/Views/Video/DamusVideoPlayer.swift
index bbca2a3758..9b08a61a85 100644
--- a/damus/Views/Video/DamusVideoPlayer.swift
+++ b/damus/Views/Video/DamusVideoPlayer.swift
@@ -43,6 +43,9 @@ struct DamusVideoPlayer: View {
                 if model.has_audio {
                     mute_button
                 }
+                if model.is_live {
+                    live_indicator
+                }
             }
             .onChange(of: centerY) { _ in
                 update_is_visible(centerY: centerY)
@@ -93,6 +96,27 @@ struct DamusVideoPlayer: View {
             }
         }
     }
+    
+    private var live_indicator: some View {
+        ZStack {
+            VStack {
+                HStack {
+                    Capsule()
+                        .fill(Color.black.opacity(0.5))
+                        .frame(width: 80, height: 30)
+                        .overlay(
+                            Text("LIVE")
+                                .bold()
+                                .foregroundColor(.red)
+                                .padding(.horizontal)
+                        )
+                        .padding([.top, .leading])
+                    Spacer()
+                }
+                Spacer()
+            }
+        }
+    }
 }
 struct DamusVideoPlayer_Previews: PreviewProvider {
     static var previews: some View {
diff --git a/damus/Views/Video/DamusVideoPlayerViewModel.swift b/damus/Views/Video/DamusVideoPlayerViewModel.swift
index 584b071250..803c3bac0a 100644
--- a/damus/Views/Video/DamusVideoPlayerViewModel.swift
+++ b/damus/Views/Video/DamusVideoPlayerViewModel.swift
@@ -31,6 +31,7 @@ final class DamusVideoPlayerViewModel: ObservableObject {
     let id = UUID()
     
     @Published var has_audio = false
+    @Published var is_live = false
     @Binding var video_size: CGSize?
     @Published var is_muted = true
     @Published var is_loading = true
@@ -38,6 +39,7 @@ final class DamusVideoPlayerViewModel: ObservableObject {
     private var cancellables = Set<AnyCancellable>()
     
     private var videoSizeObserver: NSKeyValueObservation?
+    private var videoLiveObserver: NSKeyValueObservation?
     
     private var is_scrolled_into_view = false {
         didSet {
@@ -81,6 +83,7 @@ final class DamusVideoPlayerViewModel: ObservableObject {
             .store(in: &cancellables)
         
         setupVideoSizeObserver()
+        setupLiveObserver()
     }
     
     private func setupVideoSizeObserver() {
@@ -94,6 +97,18 @@ final class DamusVideoPlayerViewModel: ObservableObject {
         })
     }
     
+    private func setupLiveObserver() {
+        videoLiveObserver = player.currentItem?.observe(\.duration, options: [.new], changeHandler: { [weak self] (playerItem, change) in
+            guard let self = self else { return }
+            if let newDuration = change.newValue, newDuration != .zero {
+                DispatchQueue.main.async {
+                    print("DEBUG:: newDuration: \(newDuration)")
+                    self.is_live = newDuration == .indefinite
+                }
+            }
+        })
+    }
+    
     private func load() async {
         if let meta = controller.metadata(for: url) {
             has_audio = meta.has_audio
@@ -125,5 +140,6 @@ final class DamusVideoPlayerViewModel: ObservableObject {
     
     deinit {
         videoSizeObserver?.invalidate()
+        videoLiveObserver?.invalidate()
     }
 }