forked from firka/firka
79 lines
2.5 KiB
Dart
79 lines
2.5 KiB
Dart
import 'dart:convert';
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import 'dart:io';
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import 'package:path_provider/path_provider.dart';
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import 'package:kreta_api/kreta_api.dart';
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const String _syncFileName = 'wear_sync_data.json';
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/// Persists and loads synced data (timetable, grades, lastSyncAt) from the phone.
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class WearSyncStore {
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List<Lesson> _timetable = [];
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List<Grade> _grades = [];
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DateTime? _lastSyncAt;
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List<Lesson> get timetable => List.unmodifiable(_timetable);
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List<Grade> get grades => List.unmodifiable(_grades);
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DateTime? get lastSyncAt => _lastSyncAt;
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/// True if we have no data or data is older than 1 hour.
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bool get needsSync {
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if (_lastSyncAt == null) return true;
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return DateTime.now().difference(_lastSyncAt!) > const Duration(hours: 1);
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}
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Future<String> _getSyncFilePath() async {
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final dir = await getApplicationDocumentsDirectory();
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return '${dir.path}/$_syncFileName';
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}
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Future<void> load() async {
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try {
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final path = await _getSyncFilePath();
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final file = File(path);
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if (!await file.exists()) return;
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final json =
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jsonDecode(await file.readAsString()) as Map<String, dynamic>;
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_lastSyncAt = json['lastSyncAt'] != null
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? DateTime.parse(json['lastSyncAt'] as String)
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: null;
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final rawTimetable = json['timetable'] as List<dynamic>? ?? [];
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_timetable = rawTimetable
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.map((e) => Lesson.fromJson(Map<String, dynamic>.from(e as Map)))
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.toList();
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final rawGrades = json['grades'] as List<dynamic>? ?? [];
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_grades = rawGrades
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.map((e) => Grade.fromJson(Map<String, dynamic>.from(e as Map)))
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.toList();
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} catch (_) {}
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}
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Future<void> save({
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required DateTime? lastSyncAt,
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required List<Lesson> timetable,
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required List<Grade> grades,
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}) async {
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_lastSyncAt = lastSyncAt;
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_timetable = timetable;
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_grades = grades;
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final path = await _getSyncFilePath();
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final file = File(path);
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await file.writeAsString(
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jsonEncode({
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'lastSyncAt': lastSyncAt?.toUtc().toIso8601String(),
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'timetable': timetable.map((e) => e.toJson()).toList(),
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'grades': grades.map((e) => e.toJson()).toList(),
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}),
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);
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}
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/// Returns lessons that fall on [date] (by date string or start date).
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List<Lesson> getLessonsForDate(DateTime date) {
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final dateStr =
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'${date.year}-${date.month.toString().padLeft(2, '0')}-${date.day.toString().padLeft(2, '0')}';
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return _timetable.where((l) => l.date == dateStr).toList()
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..sort((a, b) => a.start.compareTo(b.start));
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}
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}
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