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