66 lines
2.2 KiB
Dart
66 lines
2.2 KiB
Dart
import '../models/user_profile.dart';
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import '../models/cycle_entry.dart';
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class CycleService {
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/// Calculates the current cycle information based on user profile
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static Map<String, dynamic> calculateCycleInfo(UserProfile? user) {
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if (user?.lastPeriodStartDate == null) {
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return {
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'phase': CyclePhase.follicular,
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'dayOfCycle': 1,
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'daysUntilPeriod': user?.averageCycleLength ?? 28,
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'isPeriodExpected': false,
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};
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}
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final lastPeriod = user!.lastPeriodStartDate!;
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final cycleLength = user.averageCycleLength;
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final now = DateTime.now();
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// Normalize dates to midnight for accurate day counting
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final startOfToday = DateTime(now.year, now.month, now.day);
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final startOfLastPeriod = DateTime(lastPeriod.year, lastPeriod.month, lastPeriod.day);
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final daysSinceLastPeriod = startOfToday.difference(startOfLastPeriod).inDays + 1;
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// Handle cases where last period was long ago (more than one cycle)
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final dayOfCycle = ((daysSinceLastPeriod - 1) % cycleLength) + 1;
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final daysUntilPeriod = cycleLength - dayOfCycle;
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CyclePhase phase;
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if (dayOfCycle <= 5) {
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phase = CyclePhase.menstrual;
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} else if (dayOfCycle <= 13) {
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phase = CyclePhase.follicular;
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} else if (dayOfCycle <= 16) {
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phase = CyclePhase.ovulation;
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} else {
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phase = CyclePhase.luteal;
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}
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return {
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'phase': phase,
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'dayOfCycle': dayOfCycle,
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'daysUntilPeriod': daysUntilPeriod,
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'isPeriodExpected': daysUntilPeriod <= 0 || dayOfCycle <= 5,
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};
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}
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/// Format cycle day for display
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static String getDayOfCycleDisplay(int day) => 'Day $day';
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/// Get phase description
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static String getPhaseDescription(CyclePhase phase) {
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switch (phase) {
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case CyclePhase.menstrual:
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return 'Your body is resting and clearing. Be gentle with yourself.';
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case CyclePhase.follicular:
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return 'Energy and optimism are rising. A great time for new projects.';
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case CyclePhase.ovulation:
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return 'You are at your peak energy and fertility.';
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case CyclePhase.luteal:
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return 'Progesterone is rising. You may feel more introverted or sensitive.';
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}
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}
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}
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