win (#1240)

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

lib/utils/duration_utils.dart

@@ -0,0 +1,54 @@
+import 'dart:math' show pow;
+
+class DurationUtils {
+  static String formatDuration(num? seconds) {
+    if (seconds == null || seconds == 0) {
+      return '00:00';
+    }
+    int h = seconds ~/ 3600;
+    seconds %= 3600;
+    int m = seconds ~/ 60;
+    seconds %= 60;
+    String sms = seconds is double
+        ? seconds.toStringAsFixed(3).padLeft(6, '0')
+        : seconds.toString().padLeft(2, '0');
+    return h == 0
+        ? "${m.toString().padLeft(2, '0')}:$sms"
+        : "${h.toString().padLeft(2, '0')}:${m.toString().padLeft(2, '0')}:$sms";
+  }
+
+  static int parseDuration(String? data) {
+    if (data == null || data.isEmpty) {
+      return 0;
+    }
+    List<int> split = data.split(':').reversed.map(int.parse).toList();
+    int duration = 0;
+    for (int i = 0; i < split.length; i++) {
+      duration += split[i] * pow(60, i).toInt();
+    }
+    return duration;
+  }
+
+  static String formatDurationBetween(int startMillis, int endMillis) {
+    int diffMillis = endMillis - startMillis;
+    final duration = Duration(milliseconds: diffMillis);
+
+    final inDays = duration.inDays;
+    final daysLeft = inDays % 365;
+    final years = inDays ~/ 365;
+    final months = daysLeft ~/ 30;
+    final days = daysLeft % 30;
+    final hours = duration.inHours % 24;
+    final minutes = duration.inMinutes % 60;
+
+    var format = '';
+
+    if (years > 0) format += '$years年';
+    if (months > 0) format += '$months月';
+    if (days > 0) format += '$days天';
+    if (hours > 0) format += '$hours小时';
+    if (minutes > 0) format += '$minutes分钟';
+
+    return format;
+  }
+}