feat: global timer count at minute changed

BenderBlog · BenderBlog · commit d98df6c6ea24 · 2026-05-08T14:23:14.000+08:00
diff --git a/lib/controller/global_timer_controller.dart b/lib/controller/global_timer_controller.dart
@@ -9,15 +9,34 @@ import 'package:watermeter/repository/logger.dart';
 class GlobalTimerController {
   static final GlobalTimerController i = GlobalTimerController._();
   GlobalTimerController._() {
-    _timer = Timer.periodic(const Duration(minutes: 1), (_) {
-      currentTimeSignal.value = DateTime.now();
-      log.debug("Global Timer: Time is ${currentTimeSignal.value}");
-    });
+    _scheduleNext();
+    log.info(
+      "Global Timer: Time is ${currentTimeSignal.value}, timer initialized",
+    );
   }
 
   final currentTimeSignal = signal(DateTime.now());
+  late Timer _timer;
 
-  late final Timer _timer;
+  /// 每次触发后重新计算到下一个整分的间隔，确保始终对齐整分。
+  void _scheduleNext() {
+    final now = DateTime.now();
+    final nextMinute = DateTime(
+      now.year,
+      now.month,
+      now.day,
+      now.hour,
+      now.minute + 1,
+    );
+    _timer = Timer(
+      nextMinute.difference(now) + const Duration(milliseconds: 100),
+      () {
+        currentTimeSignal.value = DateTime.now();
+        log.debug("Global Timer: Time is ${currentTimeSignal.value}");
+        _scheduleNext();
+      },
+    );
+  }
 
   void dispose() => _timer.cancel();
 }
