import 'package:fluffychat/l10n/l10n.dart'; import 'package:flutter/material.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 final 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) { return L10n.of(context).timeOfDay(_z(hour == 12 ? hour : hour % 12), _z(hour), _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) { var now = DateTime.now(); var sameYear = now.year == year; var sameDay = sameYear && now.month == month && now.day == day; var 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) { var now = DateTime.now(); var sameYear = now.year == year; var 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(); }