359 lines
12 KiB
Dart
359 lines
12 KiB
Dart
import 'package:flutter/foundation.dart';
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import '../domain/app_snapshot.dart';
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import '../domain/app_settings.dart';
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import '../data/snapshot_store.dart';
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import '../data/json_schedule_import.dart';
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import '../services/notification_service.dart';
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import '../services/calendar_service.dart';
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import '../domain/schedule_engine.dart';
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import '../data/demo_schedule.dart';
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import '../domain/exam_schedule.dart';
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import '../domain/school_term.dart';
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class AppController extends ChangeNotifier {
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AppController(this.store, this.notifications, this.calendar, this.clock);
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final SnapshotStore store;
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final NotificationService notifications;
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final CalendarService calendar;
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final DateTime Function() clock;
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AppSnapshot snapshot = AppSnapshot();
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bool isDemo = false;
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bool storageReady = true;
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List<Course> _demo = [];
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AppSettings? _demoSettings;
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Future<void> _queue = Future.value();
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String? lastError, calendarSyncError;
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ReminderResult reminderResult = const ReminderResult(ReminderStatus.off);
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List<Course> get visibleCourses => isDemo ? _demo : snapshot.courses;
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AppSettings get visibleSettings =>
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isDemo ? _demoSettings! : snapshot.settings;
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Future<void> _run(Future<void> Function() operation) {
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final next = _queue.then((_) async {
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if (storageReady) {
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lastError = null;
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}
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try {
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await operation();
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} catch (error) {
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lastError = error.toString();
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}
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notifyListeners();
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});
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_queue = next;
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return next;
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}
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void _checkStorage() {
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if (!storageReady) throw StateError('请先恢复备份，避免覆盖损坏的保存文件');
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}
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Future<void> _save(AppSnapshot next) async {
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_checkStorage();
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await store.save(next);
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snapshot = next;
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lastError = null;
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}
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Future<void> initialize() => _run(() async {
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try {
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snapshot = await store.load() ?? AppSnapshot();
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storageReady = true;
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} catch (_) {
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storageReady = false;
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throw const FormatException('保存文件读取失败，可恢复最近备份');
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}
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await _reconcile();
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});
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Future<void> restoreBackup() => _run(() async {
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snapshot = await store.restoreBackup();
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storageReady = true;
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lastError = null;
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await _reconcile();
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});
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Future<void> showDemo({List<Course>? courses}) => _run(() async {
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_demo = courses ?? demoCourses();
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isDemo = true;
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final today = ScheduleEngine.schoolDate(clock());
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_demoSettings = snapshot.settings.copyWith(
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semester: Semester(
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startDate: today.subtract(Duration(days: today.weekday - 1)),
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totalWeeks: 20,
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),
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remindersEnabled: false,
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calendarEnabled: false,
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);
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});
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Future<void> leaveDemo() => _run(() async {
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isDemo = false;
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});
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Future<void> updateSettings(
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AppSettings Function(AppSettings current) change,
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) => _run(() async {
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final previous = snapshot.settings;
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final value = change(previous);
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if (![5, 10, 15, 30, 60].contains(value.reminderMinutes)) {
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throw ArgumentError('提醒时间无效');
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}
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if (!value.courseHeightScale.isFinite ||
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value.courseHeightScale < AppSettings.minCourseHeightScale ||
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value.courseHeightScale > AppSettings.maxCourseHeightScale) {
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throw ArgumentError('课程条长度无效');
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}
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await _save(snapshot.copyWith(settings: value));
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if (isDemo) {
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_demoSettings = _demoSettings!.copyWith(
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colorMode: value.colorMode,
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singleColorArgb: value.singleColorArgb,
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courseHeightScale: value.courseHeightScale,
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);
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}
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final scheduleChanged =
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previous.semester != value.semester ||
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previous.remindersEnabled != value.remindersEnabled ||
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previous.reminderMinutes != value.reminderMinutes ||
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previous.calendarEnabled != value.calendarEnabled ||
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previous.calendarId != value.calendarId;
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if (scheduleChanged) await _reconcile();
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});
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Future<void> applyImport(
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ImportDraft draft, {
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required bool confirmedEmpty,
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}) => _run(() async {
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if (draft.courses.isEmpty && (!draft.explicitlyEmpty || !confirmedEmpty)) {
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throw const FormatException('未检测到课程，已有课表保持不变');
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}
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if (draft.courses.map((c) => c.id).toSet().length != draft.courses.length) {
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throw const FormatException('课程标识重复');
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}
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if (draft.source == CourseSource.demo) {
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_demo = draft.courses;
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isDemo = true;
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final today = ScheduleEngine.schoolDate(clock());
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_demoSettings = snapshot.settings.copyWith(
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semester: Semester(
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startDate: today.subtract(Duration(days: today.weekday - 1)),
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totalWeeks: 20,
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),
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remindersEnabled: false,
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calendarEnabled: false,
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);
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return;
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}
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if (draft.courses.any((c) => c.source != draft.source)) {
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throw const FormatException('课程来源不一致');
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}
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await _save(
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snapshot.copyWith(
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courses: draft.courses,
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schoolTerm: draft.schoolTerm,
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clearExams: _differentTerm(draft.schoolTerm),
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settings: _differentTerm(draft.schoolTerm)
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? snapshot.settings.copyWith(clearSemester: true)
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: snapshot.settings,
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importMetadata: ImportMetadata(
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source: draft.source,
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importedAt: clock(),
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parserVersion: draft.parserVersion,
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),
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),
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);
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isDemo = false;
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await _reconcile();
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});
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Future<void> clearCourses() => _run(() async {
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// Preserve ownership mapping until cleanup has actually succeeded.
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await _save(
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snapshot.copyWith(
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courses: [],
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clearMetadata: true,
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calendarCleanupPending: true,
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),
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);
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isDemo = false;
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try {
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await notifications.cancelOwned();
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} catch (_) {
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reminderResult = const ReminderResult(
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ReminderStatus.error,
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message: '提醒清理失败，可重试',
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);
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}
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await _cleanupCalendar();
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});
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Future<void> applyExams(ExamSchedule value) => _run(() async {
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final validated = ExamSchedule.fromJson(value.toJson());
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final term = SchoolTerm(int.parse(validated.termId));
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final changed = _differentTerm(term);
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await _save(
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snapshot.copyWith(
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examSchedule: validated,
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schoolTerm: term,
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courses: changed ? [] : null,
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clearMetadata: changed,
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settings: changed
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? snapshot.settings.copyWith(clearSemester: true)
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: null,
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),
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);
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if (changed) {
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isDemo = false;
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await _reconcile();
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}
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});
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bool _differentTerm(SchoolTerm? next) =>
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next != null &&
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((snapshot.schoolTerm != null && snapshot.schoolTerm != next) ||
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(snapshot.schoolTerm == null &&
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(snapshot.courses.isNotEmpty || snapshot.examSchedule != null)));
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Future<void> clearExams() => _run(() async {
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await _save(snapshot.copyWith(clearExams: true));
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});
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Future<void> disableCalendar({required bool deleteEvents}) => _run(() async {
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await _save(
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snapshot.copyWith(
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settings: snapshot.settings.copyWith(calendarEnabled: false),
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calendarCleanupPending: deleteEvents || snapshot.calendarCleanupPending,
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),
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);
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if (deleteEvents) {
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await _cleanupCalendar();
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}
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calendarSyncError = null;
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});
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Future<void> enableCalendarFromUserAction(String calendarId) =>
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_run(() async {
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if (isDemo) throw StateError('示例课表不会导入日历');
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if (snapshot.settings.semester == null) throw StateError('请先设置学期');
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if (!await calendar.requestAccess()) {
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calendarSyncError = '日历权限未获允许';
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return;
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}
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if (snapshot.calendarCleanupPending) {
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await _cleanupCalendar();
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}
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final calendars = await calendar.listWritableCalendars();
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if (!calendars.any((c) => c.id == calendarId)) {
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calendarSyncError = '请选择可写入的日历';
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return;
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}
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final settings = snapshot.settings.copyWith(
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calendarEnabled: true,
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calendarId: calendarId,
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);
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// Keep the chosen calendar for recovery if the first native sync fails midway.
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await _save(
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snapshot.copyWith(
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settings: settings.copyWith(calendarEnabled: false),
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calendarCleanupPending: true,
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calendarEventIds: snapshot.settings.calendarId == calendarId
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? snapshot.calendarEventIds
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: {},
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),
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);
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try {
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final ids = await calendar.sync(
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ScheduleEngine.occurrences(snapshot.courses, settings.semester!),
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calendarId,
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snapshot.calendarEventIds,
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);
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await _save(
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snapshot.copyWith(
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settings: settings,
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calendarEventIds: ids,
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calendarCleanupPending: false,
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),
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);
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calendarSyncError = null;
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} catch (_) {
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calendarSyncError = '日历同步失败，可重试';
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}
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});
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Future<void> enableRemindersFromUserAction() => _run(() async {
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if (isDemo) throw StateError('示例课表不会生成提醒');
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await notifications.requestPermissions();
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await _save(
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snapshot.copyWith(
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settings: snapshot.settings.copyWith(remindersEnabled: true),
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),
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);
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await _reconcile();
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});
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Future<void> refreshServices() => _run(_reconcile);
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Future<void> startFreshData() => _run(() async {
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if (storageReady) {
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throw StateError('保存文件正常，无需重新建立');
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}
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snapshot = await store.startFresh();
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storageReady = true;
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isDemo = false;
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lastError = null;
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await _reconcile();
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});
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Future<void> retryCalendarCleanup() => _run(() async {
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if (await calendar.requestAccess()) {
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await _cleanupCalendar();
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} else {
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calendarSyncError = '日历权限未获允许，课程日程尚未清理';
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}
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});
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Future<void> _cleanupCalendar() async {
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try {
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await calendar.deleteOwned(snapshot.calendarEventIds);
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final calendarId = snapshot.settings.calendarId;
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if (calendarId != null) {
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await calendar.deleteOwned(await calendar.ownedEventIds(calendarId));
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}
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await _save(
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snapshot.copyWith(calendarEventIds: {}, calendarCleanupPending: false),
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);
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calendarSyncError = null;
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} catch (_) {
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calendarSyncError = '课程日程尚未清理，请允许日历访问后重试';
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rethrow;
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}
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}
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Future<void> _reconcile() async {
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if (!storageReady) {
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return;
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}
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final settings = snapshot.settings;
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final occurrences = settings.semester == null
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? <CourseOccurrence>[]
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: ScheduleEngine.occurrences(snapshot.courses, settings.semester!);
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try {
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reminderResult = await notifications.reconcile(
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occurrences,
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settings,
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clock(),
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);
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} catch (_) {
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reminderResult = const ReminderResult(
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ReminderStatus.error,
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message: '提醒设置未完成，可重试',
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);
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}
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if (snapshot.calendarCleanupPending) {
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try {
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await _cleanupCalendar();
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} catch (_) {
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return;
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}
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}
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if (settings.calendarEnabled && settings.calendarId != null) {
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try {
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final ids = await calendar.sync(
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occurrences,
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settings.calendarId!,
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snapshot.calendarEventIds,
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);
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await _save(snapshot.copyWith(calendarEventIds: ids));
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calendarSyncError = null;
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} catch (_) {
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calendarSyncError = '日历同步失败，可重试';
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}
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}
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}
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}
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