auto reconnect & opt. perf.

lib/data/model/server/try_limiter.dart

@@ -0,0 +1,27 @@
+import '../../../locator.dart';
+import '../../store/setting.dart';
+
+class TryLimiter {
+  final Map<String, int> _triedTimes = {};
+
+  bool shouldTry(String id) {
+    final maxCount = locator<SettingStore>().maxRetryCount.fetch()!;
+    if (maxCount <= 0) {
+      return true;
+    }
+    final times = _triedTimes[id] ?? 0;
+    if (times >= maxCount) {
+      return false;
+    }
+    _triedTimes[id] = times + 1;
+    return true;
+  }
+
+  void resetTryTimes(String id) {
+    _triedTimes[id] = 0;
+  }
+
+  void clear() {
+    _triedTimes.clear();
+  }
+}