74 lines
1.9 KiB
Dart
74 lines
1.9 KiB
Dart
import 'dart:async';
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import 'package:dartx/dartx.dart';
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import 'package:hiddify/utils/custom_loggers.dart';
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import 'package:neat_periodic_task/neat_periodic_task.dart';
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import 'package:shared_preferences/shared_preferences.dart';
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const _cronKeyPrefix = "cron_";
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typedef Job<T> = (
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String key,
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Duration duration,
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FutureOr<T?> Function() callback,
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);
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class CronService with InfraLogger {
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CronService(this.prefs);
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final SharedPreferences prefs;
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NeatPeriodicTaskScheduler? _scheduler;
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Map<String, Job> jobs = {};
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void schedule<T>({
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required String key,
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required Duration duration,
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required FutureOr<T?> Function() callback,
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}) {
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loggy.debug("scheduling [$key]");
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jobs[key] = (key, duration, callback);
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}
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Future<void> run(Job job) async {
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final key = job.$1;
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final prefKey = "$_cronKeyPrefix$key";
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final previousRunTime = DateTime.tryParse(prefs.getString(prefKey) ?? "");
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loggy.debug(
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"[$key] > ${previousRunTime == null ? "first run" : "previous run on [$previousRunTime]"}",
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);
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if (previousRunTime != null &&
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previousRunTime.add(job.$2) > DateTime.now()) {
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loggy.debug("[$key] > didn't meet criteria");
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return;
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}
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final result = await job.$3();
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await prefs.setString(prefKey, DateTime.now().toIso8601String());
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return result;
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}
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Future<void> startScheduler() async {
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loggy.debug("starting job scheduler");
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await _scheduler?.stop();
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int runCount = 0;
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_scheduler = NeatPeriodicTaskScheduler(
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name: "cron job scheduler",
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interval: const Duration(minutes: 5),
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timeout: const Duration(seconds: 15),
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minCycle: const Duration(minutes: 1),
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task: () {
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loggy.debug("in run ${runCount++}");
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return Future.wait(jobs.values.map(run));
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},
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);
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_scheduler!.start();
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}
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Future<void> stopScheduler() async {
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loggy.debug("stopping job scheduler");
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return _scheduler?.stop();
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}
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}
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