Jean-Luc Makiola
d2e452655c
- Add Rooms, Tasks, TaskCompletions Drift tables with schema v2 migration - Create RoomsDao with CRUD, watchAll, watchWithStats, cascade delete, reorder - Create TasksDao with CRUD, watchInRoom (sorted by due), completeTask, overdue detection - Implement calculateNextDueDate and catchUpToPresent pure scheduling functions - Define IntervalType enum (8 types), EffortLevel enum, FrequencyInterval model - Add formatRelativeDate German formatter and curatedRoomIcons icon list - Enable PRAGMA foreign_keys in beforeOpen migration strategy - All 30 unit tests passing (17 scheduling + 6 rooms DAO + 7 tasks DAO) Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
67 lines
2.4 KiB
Dart
67 lines
2.4 KiB
Dart
import 'frequency.dart';
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/// Calculate the next due date from the current due date and interval config.
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///
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/// For calendar-anchored intervals, [anchorDay] is the original day-of-month.
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/// Day-count intervals use pure arithmetic (Duration).
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/// Calendar-anchored intervals use month arithmetic with clamping.
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DateTime calculateNextDueDate({
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required DateTime currentDueDate,
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required IntervalType intervalType,
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required int intervalDays,
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int? anchorDay,
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}) {
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switch (intervalType) {
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// Day-count: pure arithmetic
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case IntervalType.daily:
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return currentDueDate.add(const Duration(days: 1));
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case IntervalType.everyNDays:
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return currentDueDate.add(Duration(days: intervalDays));
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case IntervalType.weekly:
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return currentDueDate.add(const Duration(days: 7));
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case IntervalType.biweekly:
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return currentDueDate.add(const Duration(days: 14));
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// Calendar-anchored: month arithmetic with clamping
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case IntervalType.monthly:
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return _addMonths(currentDueDate, 1, anchorDay);
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case IntervalType.everyNMonths:
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return _addMonths(currentDueDate, intervalDays, anchorDay);
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case IntervalType.quarterly:
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return _addMonths(currentDueDate, 3, anchorDay);
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case IntervalType.yearly:
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return _addMonths(currentDueDate, 12, anchorDay);
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}
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}
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/// Add months with day-of-month clamping.
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/// [anchorDay] remembers the original day for correct clamping.
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DateTime _addMonths(DateTime date, int months, int? anchorDay) {
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final targetMonth = date.month + months;
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final targetYear = date.year + (targetMonth - 1) ~/ 12;
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final normalizedMonth = ((targetMonth - 1) % 12) + 1;
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final day = anchorDay ?? date.day;
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// Last day of target month: day 0 of next month
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final lastDay = DateTime(targetYear, normalizedMonth + 1, 0).day;
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final clampedDay = day > lastDay ? lastDay : day;
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return DateTime(targetYear, normalizedMonth, clampedDay);
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}
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/// Catch-up: if next due is in the past, keep adding intervals until future/today.
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DateTime catchUpToPresent({
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required DateTime nextDue,
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required DateTime today,
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required IntervalType intervalType,
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required int intervalDays,
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int? anchorDay,
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}) {
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while (nextDue.isBefore(today)) {
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nextDue = calculateNextDueDate(
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currentDueDate: nextDue,
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intervalType: intervalType,
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intervalDays: intervalDays,
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anchorDay: anchorDay,
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);
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}
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return nextDue;
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}
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