chapter selection in player

lib/shared/extensions/chapter.dart

@@ -0,0 +1,8 @@
+import 'package:shelfsdk/audiobookshelf_api.dart';
+
+extension ChapterDuration on BookChapter {
+  Duration get duration {
+    // end - start
+    return end - start;
+  }
+}

lib/shared/extensions/duration_format.dart

@@ -1,12 +1,20 @@
 extension DurationFormat on Duration {
-  /// formats the duration of the book as `10h 30m`
+  /// formats the duration using only 2 units
   ///
-  /// will add up all the durations of the audio files first
-  /// then convert them to the given format
-  String get formattedBinary {
+  /// if the duration is more than 1 hour, it will return `10h 30m`
+  /// if the duration is less than 1 hour, it will return `30m 20s`
+  /// if the duration is less than 1 minute, it will return `20s`
+  String get smartBinaryFormat {
     final hours = inHours;
     final minutes = inMinutes.remainder(60);
-    return '${hours}h ${minutes}m';
+    final seconds = inSeconds.remainder(60);
+    if (hours > 0) {
+      return '${hours}h ${minutes}m';
+    } else if (minutes > 0) {
+      return '${minutes}m ${seconds}s';
+    } else {
+      return '${seconds}s';
+    }
   }
 }
 

lib/shared/hooks.dart

@@ -15,3 +15,16 @@ void useInterval(VoidCallback callback, Duration delay) {
     [delay],
   );
 }
+
+void useTimer(VoidCallback callback, Duration delay) {
+  final savedCallback = useRef(callback);
+  savedCallback.value = callback;
+
+  useEffect(
+    () {
+      final timer = Timer(delay, savedCallback.value);
+      return timer.cancel;
+    },
+    [delay],
+  );
+}

lib/shared/widgets/not_implemented.dart

@@ -0,0 +1,10 @@
+import 'package:flutter/material.dart';
+
+void showNotImplementedToast(BuildContext context) {
+  ScaffoldMessenger.of(context).showSnackBar(
+    const SnackBar(
+      content: Text("Not implemented"),
+      showCloseIcon: true,
+    ),
+  );
+}