123 lines
4.4 KiB
Dart
123 lines
4.4 KiB
Dart
import 'app_settings.dart';
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import 'course.dart';
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import 'semester.dart';
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class ImportMetadata {
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const ImportMetadata({
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required this.source,
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required this.importedAt,
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required this.parserVersion,
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});
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final CourseSource source;
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final DateTime importedAt;
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final String parserVersion;
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}
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class AppSnapshot {
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AppSnapshot({
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this.settings = const AppSettings(),
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List<Course> courses = const [],
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this.importMetadata,
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Map<String, String> calendarEventIds = const {},
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}) : courses = List.unmodifiable(courses),
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calendarEventIds = Map.unmodifiable(calendarEventIds);
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final AppSettings settings;
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final List<Course> courses;
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final ImportMetadata? importMetadata;
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final Map<String, String> calendarEventIds;
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AppSnapshot copyWith({
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AppSettings? settings,
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List<Course>? courses,
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ImportMetadata? importMetadata,
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Map<String, String>? calendarEventIds,
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bool clearMetadata = false,
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}) => AppSnapshot(
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settings: settings ?? this.settings,
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courses: courses ?? this.courses,
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importMetadata: clearMetadata
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? null
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: importMetadata ?? this.importMetadata,
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calendarEventIds: calendarEventIds ?? this.calendarEventIds,
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);
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Map<String, dynamic> toJson() => {
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'schemaVersion': 1,
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'courses': courses.map((c) => c.toJson()).toList(),
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'settings': {
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'semester': settings.semester == null
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? null
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: {
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'startDate': settings.semester!.startDate
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.toIso8601String()
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.substring(0, 10),
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'totalWeeks': settings.semester!.totalWeeks,
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},
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'remindersEnabled': settings.remindersEnabled,
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'reminderMinutes': settings.reminderMinutes,
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'colorMode': settings.colorMode.name,
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'singleColorArgb': settings.singleColorArgb,
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'calendarEnabled': settings.calendarEnabled,
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'calendarId': settings.calendarId,
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},
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'importMetadata': importMetadata == null
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? null
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: {
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'source': importMetadata!.source.name,
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'importedAt': importMetadata!.importedAt.toUtc().toIso8601String(),
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'parserVersion': importMetadata!.parserVersion,
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},
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'calendarEventIds': calendarEventIds,
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};
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static AppSnapshot fromJson(Map<String, dynamic> json) {
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try {
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if (json['schemaVersion'] != 1) throw const FormatException('不支持的保存版本');
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final values = (json['courses'] as List)
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.map((c) => Course.fromJson(Map<String, dynamic>.from(c as Map)))
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.toList();
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if (values.map((c) => c.id).toSet().length != values.length ||
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values.any((c) => c.source == CourseSource.demo)) {
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throw const FormatException('保存课表无效');
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}
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final s = Map<String, dynamic>.from(json['settings'] as Map);
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final minutes = s['reminderMinutes'] as int;
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if (![5, 10, 15, 30, 60].contains(minutes))
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throw const FormatException('提醒时间无效');
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final color = s['singleColorArgb'] as int;
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if (color < 0 || color > 0xFFFFFFFF) throw const FormatException('颜色无效');
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final sem = s['semester'];
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final term = sem == null
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? null
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: Semester(
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startDate: DateTime.parse(sem['startDate'] as String),
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totalWeeks: sem['totalWeeks'] as int,
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);
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final metadata = json['importMetadata'];
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return AppSnapshot(
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courses: values,
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settings: AppSettings(
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semester: term,
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remindersEnabled: s['remindersEnabled'] as bool,
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reminderMinutes: minutes,
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colorMode: ColorMode.values.byName(s['colorMode'] as String),
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singleColorArgb: color,
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calendarEnabled: s['calendarEnabled'] as bool,
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calendarId: s['calendarId'] as String?,
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),
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importMetadata: metadata == null
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? null
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: ImportMetadata(
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source: CourseSource.values.byName(
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metadata['source'] as String,
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),
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importedAt: DateTime.parse(metadata['importedAt'] as String),
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parserVersion: metadata['parserVersion'] as String,
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),
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calendarEventIds: (json['calendarEventIds'] as Map).map(
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(k, v) => MapEntry(k as String, v as String),
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),
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);
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} catch (_) {
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throw const FormatException('保存文件内容无效，未覆盖已有数据');
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}
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}
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}
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