70 lines
2.0 KiB
Dart
70 lines
2.0 KiB
Dart
enum CourseSource { school, file, demo }
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class Course {
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Course({
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required this.id,
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required this.name,
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required this.teacher,
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required this.room,
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required this.weekday,
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required this.startPeriod,
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required this.endPeriod,
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required Set<int> weeks,
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required this.source,
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}) : weeks = Set.unmodifiable(weeks) {
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if ([id, name, teacher, room].any((value) => value.trim().isEmpty) ||
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weekday < 1 ||
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weekday > 7 ||
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startPeriod < 1 ||
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endPeriod > 11 ||
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endPeriod < startPeriod ||
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weeks.isEmpty ||
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weeks.any((week) => week < 1 || week > 30)) {
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throw ArgumentError('课程字段、节次或周次无效');
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}
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}
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final String id, name, teacher, room;
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final int weekday, startPeriod, endPeriod;
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final Set<int> weeks;
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final CourseSource source;
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Map<String, dynamic> toJson() => {
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'id': id,
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'name': name,
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'teacher': teacher,
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'room': room,
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'weekday': weekday,
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'startPeriod': startPeriod,
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'endPeriod': endPeriod,
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'weeks': weeks.toList()..sort(),
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'source': source.name,
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};
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static Course fromJson(Map<String, dynamic> json, {CourseSource? source}) {
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try {
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String text(String key) {
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final v = json[key];
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if (v is! String) throw const FormatException('课程字段缺失');
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return v.trim();
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}
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final rawWeeks = json['weeks'];
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if (rawWeeks is! List || rawWeeks.any((w) => w is! int))
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throw const FormatException('周次必须是整数数组');
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return Course(
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id: text('id'),
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name: text('name'),
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teacher: text('teacher'),
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room: text('room'),
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weekday: json['weekday'] as int,
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startPeriod: json['startPeriod'] as int,
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endPeriod: json['endPeriod'] as int,
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weeks: rawWeeks.cast<int>().toSet(),
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source: source ?? CourseSource.values.byName(json['source'] as String),
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);
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} catch (_) {
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throw const FormatException('课程字段、节次或周次无效');
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}
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}
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}
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