自习室优化ok

lib/utils/time.dart

@@ -33,21 +33,41 @@ String formatDate(dynamic date, [String format = 'YYYY-MM-DD hh:mm:ss']) {
 
 /// 将秒数格式化为 00:00 或 00:00:00
 /// - [seconds]: 秒数
-String formatSeconds(int seconds) {
-  final h = seconds ~/ 3600;
-  final m = (seconds % 3600) ~/ 60;
-  final s = seconds % 60;
+/// - [format]: 格式化字符串，默认为 "hh:mm:ss"
+String formatSeconds(
+  int seconds, [
+  String format = 'hh:mm:ss',
+]) {
+  if (seconds < 0) seconds = 0;
 
-  String twoDigits(int n) => n.toString().padLeft(2, '0');
+  int h = seconds ~/ 3600;
+  int m = (seconds % 3600) ~/ 60;
+  int s = seconds % 60;
 
-  if (h > 0) {
-    return '${twoDigits(h)}:${twoDigits(m)}:${twoDigits(s)}';
-  } else {
-    return '${twoDigits(m)}:${twoDigits(s)}';
-  }
+  String two(int n) => n.toString().padLeft(2, '0');
+
+  // 支持以下 token：
+  // hh = 补零小时, h = 不补零小时
+  // mm = 补零分钟, m = 不补零分钟
+  // ss = 补零秒,   s = 不补零秒
+  final replacements = {
+    'hh': two(h),
+    'mm': two(m),
+    'ss': two(s),
+    'h': h.toString(),
+    'm': m.toString(),
+    's': s.toString(),
+  };
+
+  String result = format;
+
+  replacements.forEach((key, value) {
+    result = result.replaceAll(key, value);
+  });
+
+  return result;
 }
 
-
 /// 将 "HH", "HH:mm" 或 "HH:mm:ss" 转为当天 DateTime
 DateTime parseTime(String timeStr) {
   final now = DateTime.now();