import 'package:fluffychat/i18n/i18n.dart'; import 'package:flutter/material.dart'; /// Provides extra functionality for formatting the time. extension DateTimeExtension on DateTime { operator <(DateTime other) { return this.millisecondsSinceEpoch < other.millisecondsSinceEpoch; } operator >(DateTime other) { return this.millisecondsSinceEpoch > other.millisecondsSinceEpoch; } operator >=(DateTime other) { return this.millisecondsSinceEpoch >= other.millisecondsSinceEpoch; } operator <=(DateTime other) { return this.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 I18n.of(context).timeOfDay(_z(this.hour % 12), _z(this.hour), _z(this.minute), this.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) { DateTime now = DateTime.now(); bool sameYear = now.year == this.year; bool sameDay = sameYear && now.month == this.month && now.day == this.day; bool sameWeek = sameYear && !sameDay && now.millisecondsSinceEpoch - this.millisecondsSinceEpoch < 1000 * 60 * 60 * 24 * 7; if (sameDay) { return localizedTimeOfDay(context); } else if (sameWeek) { switch (this.weekday) { case 1: return I18n.of(context).monday; case 2: return I18n.of(context).tuesday; case 3: return I18n.of(context).wednesday; case 4: return I18n.of(context).thursday; case 5: return I18n.of(context).friday; case 6: return I18n.of(context).saturday; case 7: return I18n.of(context).sunday; } } else if (sameYear) { return I18n.of(context).dateWithoutYear( this.month.toString().padLeft(2, '0'), this.day.toString().padLeft(2, '0')); } return I18n.of(context).dateWithYear( this.year.toString(), this.month.toString().padLeft(2, '0'), this.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) { DateTime now = DateTime.now(); bool sameYear = now.year == this.year; bool sameDay = sameYear && now.month == this.month && now.day == this.day; if (sameDay) return localizedTimeOfDay(context); return I18n.of(context).dateAndTimeOfDay( localizedTimeShort(context), localizedTimeOfDay(context)); } static String _z(int i) => i < 10 ? "0${i.toString()}" : i.toString(); }