Player controls UI changes

WIP on controls

Chapters

working

Add previews variable

Add lists ids

WIP

Model/NetworkStateModel.swift

@@ -0,0 +1,42 @@
+import Foundation
+
+final class NetworkStateModel: ObservableObject {
+    @Published var pausedForCache = false
+    @Published var cacheDuration = 0.0
+    @Published var bufferingState = 0.0
+
+    var player: PlayerModel!
+
+    var fullStateText: String? {
+        guard let bufferingStateText = bufferingStateText,
+              let cacheDurationText = cacheDurationText
+        else {
+            return nil
+        }
+
+        return "\(bufferingStateText) (\(cacheDurationText))"
+    }
+
+    var bufferingStateText: String? {
+        guard detailsAvailable else { return nil }
+        return String(format: "%.0f%%", bufferingState)
+    }
+
+    var cacheDurationText: String? {
+        guard detailsAvailable else { return nil }
+        return String(format: "%.2fs", cacheDuration)
+    }
+
+    var detailsAvailable: Bool {
+        guard let player = player else { return false }
+        return player.activeBackend.supportsNetworkStateBufferingDetails
+    }
+
+    var needsUpdates: Bool {
+        if let player = player {
+            return pausedForCache || player.isSeeking || player.isLoadingVideo
+        }
+
+        return pausedForCache
+    }
+}