social-app/apps/lib/features/calendar/ui/dayweek/day_view_scale.dart

class DayViewScale {
  static const double defaultHourHeight = 34.0;
  static const double minHourHeight = 17.0;
  static const double maxHourHeight = 68.0;

  final double hourHeight;

  const DayViewScale({required this.hourHeight});

  factory DayViewScale.defaultScale() {
    return const DayViewScale(hourHeight: defaultHourHeight);
  }

  DayViewScale copyWith({double? hourHeight}) {
    return DayViewScale(
      hourHeight: _clampHourHeight(hourHeight ?? this.hourHeight),
    );
  }

  DayViewScale zoomByFactor(double factor) {
    if (factor <= 0) {
      return this;
    }
    return copyWith(hourHeight: hourHeight * factor);
  }

  double pixelsForMinutes(int minutes) {
    return (minutes / 60) * hourHeight;
  }

  double minutesForPixels(double pixels) {
    return (pixels / hourHeight) * 60;
  }

  static double _clampHourHeight(double value) {
    return value.clamp(minHourHeight, maxHourHeight);
  }
}