438 lines
15 KiB
Dart
438 lines
15 KiB
Dart
import 'dart:developer';
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import 'package:rrule/rrule.dart';
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import '../api/marianumconnect/queries/timetable_get_holidays/timetable_get_holidays_response.dart';
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import '../api/marianumconnect/queries/timetable_get_rooms/timetable_get_rooms_response.dart';
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import '../api/marianumconnect/queries/timetable_get_subjects/timetable_get_subjects_response.dart';
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import '../api/marianumconnect/queries/timetable_get_timegrid/timetable_get_timegrid_response.dart';
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import '../api/marianumconnect/queries/timetable_get_week/timetable_get_week_response.dart';
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import '../api/mhsl/custom_timetable_event/custom_timetable_event.dart';
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import '../api/mhsl/custom_timetable_event/get/get_custom_timetable_event_response.dart';
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import '../view/pages/timetable/data/lesson_merger.dart';
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import '../view/pages/timetable/data/lesson_period_schedule.dart';
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import '../view/pages/timetable/data/lesson_status.dart';
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import 'widget_data.dart';
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class WidgetDataMapper {
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/// After 17:00 the user's question shifts from "what's left today" to
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/// "what's tomorrow", so the day-widget rolls forward.
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static const int _dayWidgetCutoffHour = 17;
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static const _weekend = {DateTime.saturday, DateTime.sunday};
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static DateTime resolveDayAnchor(DateTime now) {
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var candidate = DateTime(now.year, now.month, now.day);
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final shiftToTomorrow =
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now.hour >= _dayWidgetCutoffHour || _weekend.contains(now.weekday);
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if (shiftToTomorrow) {
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candidate = candidate.add(const Duration(days: 1));
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}
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while (_weekend.contains(candidate.weekday)) {
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candidate = candidate.add(const Duration(days: 1));
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}
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return candidate;
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}
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static DateTime resolveWeekAnchor(DateTime now) {
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final anchor = resolveDayAnchor(now);
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final monday = anchor.subtract(Duration(days: anchor.weekday - 1));
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return DateTime(monday.year, monday.month, monday.day);
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}
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static WidgetTimetableData buildDayData({
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required DateTime now,
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required Iterable<McTimetableEntry> lessons,
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required TimetableGetSubjectsResponse? subjects,
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required TimetableGetRoomsResponse? rooms,
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required TimetableGetHolidaysResponse? holidays,
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TimetableGetTimegridResponse? timegrid,
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GetCustomTimetableEventResponse? customEvents,
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bool connectDoubleLessons = true,
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}) {
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final anchor = resolveDayAnchor(now);
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final holiday = _findHoliday(anchor, holidays);
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final dayStart = anchor;
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final dayEnd = anchor.add(const Duration(days: 1));
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final dayLessons = lessons.where((l) => _onSameDay(l, anchor)).toList();
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final source = connectDoubleLessons
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? LessonMerger.merge(dayLessons)
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: dayLessons;
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final mapped = <WidgetLesson>[
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...source.map((l) => _mapLesson(l, now, subjects, rooms)),
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..._expandCustomEvents(customEvents, dayStart, dayEnd),
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]..sort((a, b) => a.start.compareTo(b.start));
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return WidgetTimetableData(
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fetchedAt: now,
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anchorDate: anchor,
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lessons: _resolveCollisions(mapped),
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periods: _resolvePeriods(timegrid),
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isHoliday: holiday != null,
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holidayName: holiday?.longName,
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);
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}
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static WidgetTimetableData buildWeekData({
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required DateTime now,
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required Iterable<McTimetableEntry> lessons,
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required TimetableGetSubjectsResponse? subjects,
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required TimetableGetRoomsResponse? rooms,
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required TimetableGetHolidaysResponse? holidays,
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TimetableGetTimegridResponse? timegrid,
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GetCustomTimetableEventResponse? customEvents,
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bool connectDoubleLessons = true,
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}) {
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final anchor = resolveWeekAnchor(now);
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final endExclusive = anchor.add(const Duration(days: 5));
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final weekLessons = lessons.where((l) {
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final dt = l.startDateTime;
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return !dt.isBefore(anchor) && dt.isBefore(endExclusive);
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}).toList();
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// Per-day merge: otherwise a 4th-period lesson on Mon would collapse with
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// a 1st-period lesson on Tue if subject/teacher match.
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final source = connectDoubleLessons
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? _mergePerDay(weekLessons)
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: weekLessons;
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final mapped = <WidgetLesson>[
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...source.map((l) => _mapLesson(l, now, subjects, rooms)),
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..._expandCustomEvents(customEvents, anchor, endExclusive),
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]..sort((a, b) => a.start.compareTo(b.start));
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return WidgetTimetableData(
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fetchedAt: now,
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anchorDate: anchor,
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lessons: _resolveCollisions(mapped),
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periods: _resolvePeriods(timegrid),
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);
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}
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/// cancelled (0) < event (1) < regular (2) — events replace cancelled
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/// lessons but lose to real ones, leaving a `+1` hint on the survivor.
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static int _priority(WidgetLessonStatus status) => switch (status) {
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WidgetLessonStatus.cancelled => 0,
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WidgetLessonStatus.event => 1,
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_ => 2,
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};
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static List<WidgetLesson> _resolveCollisions(List<WidgetLesson> lessons) {
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if (lessons.length <= 1) return lessons;
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bool overlaps(WidgetLesson l, WidgetLesson other) =>
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l != other && l.start.isBefore(other.end) && l.end.isAfter(other.start);
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// Index-based: a long event covering several regulars must bump *every*
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// covered lesson, not just the first overlap.
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final dropped = List<bool>.filled(lessons.length, false);
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final bumps = List<int>.filled(lessons.length, 0);
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for (var i = 0; i < lessons.length; i++) {
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final l = lessons[i];
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final myPrio = _priority(l.status);
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final overrideIdxs = <int>[];
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for (var j = 0; j < lessons.length; j++) {
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if (i == j) continue;
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if (_priority(lessons[j].status) <= myPrio) continue;
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if (!overlaps(l, lessons[j])) continue;
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overrideIdxs.add(j);
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}
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if (overrideIdxs.isNotEmpty) {
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dropped[i] = true;
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if (l.status == WidgetLessonStatus.event) {
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for (final idx in overrideIdxs) {
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bumps[idx] += 1;
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}
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}
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}
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}
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final filtered = <WidgetLesson>[];
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for (var i = 0; i < lessons.length; i++) {
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if (dropped[i]) continue;
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final l = lessons[i];
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filtered.add(
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bumps[i] > 0
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? l.copyWith(siblingCount: l.siblingCount + bumps[i])
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: l,
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);
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}
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if (filtered.length <= 1) return filtered;
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final groups = <String, List<WidgetLesson>>{};
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for (final l in filtered) {
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final key =
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'${l.start.year}-${l.start.month}-${l.start.day}-${l.start.hour}-${l.start.minute}';
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groups.putIfAbsent(key, () => []).add(l);
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}
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final result = <WidgetLesson>[];
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for (final group in groups.values) {
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if (group.length == 1) {
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result.add(group.first);
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continue;
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}
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final active = group
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.where((l) => l.status != WidgetLessonStatus.cancelled)
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.toList();
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if (active.isEmpty) {
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result.addAll(group);
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continue;
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}
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active.sort((a, b) => a.subjectShort.compareTo(b.subjectShort));
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// Additive — preserves the event-bump from the priority pass, otherwise
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// a slot with another regular lesson AND a hidden event would show +1
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// instead of +2.
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final keeper = active.first;
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result.add(
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keeper.copyWith(
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siblingCount: keeper.siblingCount + active.length - 1,
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),
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);
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}
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return result..sort((a, b) => a.start.compareTo(b.start));
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}
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/// Gaps below this collapse to zero on the virtual axis so 45-min slots
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/// stack flush; bigger gaps survive as visible Pause-blocks.
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static const int _smallBreakThresholdMinutes = 5;
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static List<WidgetPeriod> _resolvePeriods(
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TimetableGetTimegridResponse? timegrid,
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) {
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final schedule =
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(timegrid != null ? LessonPeriodSchedule.fromApi(timegrid) : null) ??
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LessonPeriodSchedule.fallback();
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final raw = schedule.periods
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.map(
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(p) => (
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name: p.name,
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start: p.start.hour * 60 + p.start.minute,
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end: p.end.hour * 60 + p.end.minute,
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),
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)
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.toList()
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..sort((a, b) => a.start.compareTo(b.start));
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final result = <WidgetPeriod>[];
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var virtualOffset = 0;
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int? prevEnd;
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for (final p in raw) {
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if (prevEnd != null) {
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final gap = p.start - prevEnd;
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if (gap > _smallBreakThresholdMinutes) virtualOffset += gap;
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}
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final duration = p.end - p.start;
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result.add(
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WidgetPeriod(
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name: p.name,
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startMinutes: p.start,
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endMinutes: p.end,
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virtualStartMinutes: virtualOffset,
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virtualEndMinutes: virtualOffset + duration,
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),
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);
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virtualOffset += duration;
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prevEnd = p.end;
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}
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return result;
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}
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// Per-Tag-Merge: ohne diese Gruppierung würde eine letzte Stunde am Montag
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// mit der ersten Stunde am Dienstag verschmelzen, wenn Fach + Lehrer
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// identisch sind.
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static List<McTimetableEntry> _mergePerDay(List<McTimetableEntry> lessons) {
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final byDay = <String, List<McTimetableEntry>>{};
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for (final l in lessons) {
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final key = '${l.date.year}-${l.date.month}-${l.date.day}';
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byDay.putIfAbsent(key, () => []).add(l);
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}
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return [for (final group in byDay.values) ...LessonMerger.merge(group)];
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}
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static WidgetLesson _mapLesson(
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McTimetableEntry lesson,
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DateTime now,
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TimetableGetSubjectsResponse? subjects,
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TimetableGetRoomsResponse? rooms,
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) {
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final start = lesson.startDateTime;
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final end = lesson.endDateTime;
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final status = _mapStatus(
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LessonStatusClassifier.classify(lesson, start, end, now),
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);
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final subjectShortRaw = lesson.subjects.firstOrNull?.trim() ?? '';
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// Webuntis sometimes ships subject-less entries (Wandertag etc.). Fall
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// back to "Event" so the tile isn't just a dash.
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final subjectShort = subjectShortRaw.isEmpty ? 'Event' : subjectShortRaw;
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String? subjectLong;
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if (subjects != null && subjectShortRaw.isNotEmpty) {
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subjectLong = subjects.result
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.where((s) => s.shortName == subjectShortRaw)
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.firstOrNull
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?.longName;
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}
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final roomShort = lesson.rooms.firstOrNull;
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var roomName = roomShort;
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if (rooms != null && roomShort != null) {
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roomName = rooms.result
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.where((r) => r.shortName == roomShort)
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.firstOrNull
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?.shortName ??
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roomName;
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}
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final teacher = lesson.teachers.firstOrNull;
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final teacherName = teacher?.shortName;
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final originalTeacher = teacher?.originalShortName;
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return WidgetLesson(
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start: start,
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end: end,
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subjectShort: subjectShort,
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subjectLong: subjectLong,
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room: roomName,
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teacher: teacherName,
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originalTeacher: originalTeacher,
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status: status,
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);
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}
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static WidgetLessonStatus _mapStatus(LessonStatus status) {
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switch (status) {
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case LessonStatus.cancelled:
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return WidgetLessonStatus.cancelled;
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case LessonStatus.event:
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return WidgetLessonStatus.event;
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case LessonStatus.irregular:
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return WidgetLessonStatus.irregular;
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case LessonStatus.teacherChanged:
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return WidgetLessonStatus.teacherChanged;
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case LessonStatus.duty:
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return WidgetLessonStatus.duty;
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case LessonStatus.past:
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return WidgetLessonStatus.past;
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case LessonStatus.ongoing:
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return WidgetLessonStatus.ongoing;
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case LessonStatus.regular:
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return WidgetLessonStatus.regular;
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}
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}
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static bool _onSameDay(McTimetableEntry lesson, DateTime day) {
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return lesson.date.year == day.year &&
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lesson.date.month == day.month &&
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lesson.date.day == day.day;
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}
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static McHoliday? _findHoliday(
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DateTime day,
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TimetableGetHolidaysResponse? holidays,
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) {
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if (holidays == null) return null;
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final asDay = DateTime(day.year, day.month, day.day);
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for (final h in holidays.result) {
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final start = DateTime(h.startDate.year, h.startDate.month, h.startDate.day);
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final end = DateTime(h.endDate.year, h.endDate.month, h.endDate.day);
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if (!asDay.isBefore(start) && !asDay.isAfter(end)) return h;
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}
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return null;
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}
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static Iterable<WidgetLesson> _expandCustomEvents(
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GetCustomTimetableEventResponse? customEvents,
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DateTime rangeStart,
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DateTime rangeEndExclusive,
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) sync* {
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if (customEvents == null) return;
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final rangeStartUtc = rangeStart.toUtc();
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final rangeEndUtc = rangeEndExclusive.toUtc();
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for (final event in customEvents.events) {
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yield* _expandSingleEvent(event, rangeStartUtc, rangeEndUtc);
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}
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}
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static Iterable<WidgetLesson> _expandSingleEvent(
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CustomTimetableEvent event,
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DateTime rangeStartUtc,
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DateTime rangeEndUtc,
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) sync* {
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final rule = event.rrule;
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final duration = event.endDate.difference(event.startDate);
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if (rule.isEmpty) {
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final startUtc = event.startDate.toUtc();
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if (startUtc.isBefore(rangeStartUtc) ||
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!startUtc.isBefore(rangeEndUtc)) {
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return;
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}
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yield* _customEventToWidgetLessons(event, event.startDate, duration);
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return;
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}
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try {
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final parsed = RecurrenceRule.fromString(rule);
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final anchorUtc = event.startDate.toUtc();
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for (final occUtc in parsed.getInstances(start: anchorUtc)) {
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if (!occUtc.isBefore(rangeEndUtc)) break;
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if (occUtc.isBefore(rangeStartUtc)) continue;
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final occLocal = occUtc.toLocal();
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final occStart = DateTime(
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occLocal.year,
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occLocal.month,
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occLocal.day,
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event.startDate.hour,
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event.startDate.minute,
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);
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yield* _customEventToWidgetLessons(event, occStart, duration);
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}
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} on Exception catch (e) {
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log('Widget mapper: invalid rrule "$rule" on event ${event.id}: $e');
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}
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}
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/// Splits multi-day events into one block per local calendar day, so each
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/// affected day on the week-widget shows the event. All-day events
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/// (start = end = midnight) collapse to a single 00:00–23:59 block.
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static Iterable<WidgetLesson> _customEventToWidgetLessons(
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CustomTimetableEvent event,
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DateTime occurrenceStart,
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Duration duration,
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) sync* {
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final title = event.title.trim();
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WidgetLesson buildBlock(DateTime start, DateTime end) => WidgetLesson(
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start: start,
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end: end,
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subjectShort: title.isEmpty ? 'Termin' : title,
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subjectLong: title.isEmpty ? null : title,
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status: WidgetLessonStatus.event,
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customColor: event.color,
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);
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final isAllDay = duration == Duration.zero && _isMidnight(event.startDate);
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if (isAllDay) {
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yield buildBlock(
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occurrenceStart,
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DateTime(
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occurrenceStart.year,
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occurrenceStart.month,
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occurrenceStart.day,
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23,
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59,
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),
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);
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return;
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}
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final actualEnd = occurrenceStart.add(duration);
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var segmentStart = occurrenceStart;
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while (segmentStart.isBefore(actualEnd)) {
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final nextMidnight = DateTime(
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segmentStart.year,
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segmentStart.month,
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segmentStart.day,
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).add(const Duration(days: 1));
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final segmentEnd = actualEnd.isBefore(nextMidnight)
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? actualEnd
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: nextMidnight.subtract(const Duration(minutes: 1));
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yield buildBlock(segmentStart, segmentEnd);
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segmentStart = nextMidnight;
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}
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}
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static bool _isMidnight(DateTime d) =>
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d.hour == 0 && d.minute == 0 && d.second == 0;
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}
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