import 'package:flutter/material.dart'; import 'package:flutter_gen/gen_l10n/l10n.dart'; /// Provides extra functionality for formatting the time. extension DateTimeExtension on DateTime { bool operator <(DateTime other) { return millisecondsSinceEpoch < other.millisecondsSinceEpoch; } bool operator >(DateTime other) { return millisecondsSinceEpoch > other.millisecondsSinceEpoch; } bool operator >=(DateTime other) { return millisecondsSinceEpoch >= other.millisecondsSinceEpoch; } bool operator <=(DateTime other) { return millisecondsSinceEpoch <= other.millisecondsSinceEpoch; } /// Two message events can belong to the same environment. That means that they /// don't need to display the time they were sent because they are close /// enaugh. static const minutesBetweenEnvironments = 5; /// Checks if two DateTimes are close enough to belong to the same /// environment. bool sameEnvironment(DateTime prevTime) { return millisecondsSinceEpoch - prevTime.millisecondsSinceEpoch < 1000 * 60 * minutesBetweenEnvironments; } /// Returns a simple time String. /// TODO: Add localization String localizedTimeOfDay(BuildContext context) { if (MediaQuery.of(context).alwaysUse24HourFormat) { return '${_z(hour)}:${_z(minute)}'; } else { return '${_z(hour % 12 == 0 ? 12 : hour % 12)}:${_z(minute)} ${hour > 11 ? "pm" : "am"}'; } } /// Returns [localizedTimeOfDay()] if the ChatTime is today, the name of the week /// day if the ChatTime is this week and a date string else. String localizedTimeShort(BuildContext context) { final now = DateTime.now(); final sameYear = now.year == year; final sameDay = sameYear && now.month == month && now.day == day; final sameWeek = sameYear && !sameDay && now.millisecondsSinceEpoch - millisecondsSinceEpoch < 1000 * 60 * 60 * 24 * 7; if (sameDay) { return localizedTimeOfDay(context); } else if (sameWeek) { switch (weekday) { case 1: return L10n.of(context)!.monday; case 2: return L10n.of(context)!.tuesday; case 3: return L10n.of(context)!.wednesday; case 4: return L10n.of(context)!.thursday; case 5: return L10n.of(context)!.friday; case 6: return L10n.of(context)!.saturday; case 7: return L10n.of(context)!.sunday; } } else if (sameYear) { return L10n.of(context)!.dateWithoutYear( month.toString().padLeft(2, '0'), day.toString().padLeft(2, '0')); } return L10n.of(context)!.dateWithYear(year.toString(), month.toString().padLeft(2, '0'), day.toString().padLeft(2, '0')); } /// If the DateTime is today, this returns [localizedTimeOfDay()], if not it also /// shows the date. /// TODO: Add localization String localizedTime(BuildContext context) { final now = DateTime.now(); final sameYear = now.year == year; final sameDay = sameYear && now.month == month && now.day == day; if (sameDay) return localizedTimeOfDay(context); return L10n.of(context)!.dateAndTimeOfDay( localizedTimeShort(context), localizedTimeOfDay(context)); } static String _z(int i) => i < 10 ? '0${i.toString()}' : i.toString(); }