133 lines
3.9 KiB
Dart
133 lines
3.9 KiB
Dart
/*
|
|
* Copyright (c) 2019 Zender & Kurtz GbR.
|
|
*
|
|
* Authors:
|
|
* Christian Pauly <krille@famedly.com>
|
|
* Marcel Radzio <mtrnord@famedly.com>
|
|
*
|
|
* This file is part of famedlysdk.
|
|
*
|
|
* famedlysdk is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* famedlysdk is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with famedlysdk. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
/// Used to localize and present time in a chat application manner.
|
|
class ChatTime {
|
|
DateTime dateTime = DateTime.now();
|
|
|
|
/// Insert with a timestamp [ts] which represents the milliseconds since
|
|
/// the Unix epoch.
|
|
ChatTime(DateTime ts) {
|
|
if (ts != null) dateTime = ts;
|
|
}
|
|
|
|
/// Returns a ChatTime object which represents the current time.
|
|
ChatTime.now() {
|
|
dateTime = DateTime.now();
|
|
}
|
|
|
|
/// Returns [toTimeString()] if the ChatTime is today, the name of the week
|
|
/// day if the ChatTime is this week and a date string else.
|
|
String toString() {
|
|
DateTime now = DateTime.now();
|
|
|
|
bool sameYear = now.year == dateTime.year;
|
|
|
|
bool sameDay =
|
|
sameYear && now.month == dateTime.month && now.day == dateTime.day;
|
|
|
|
bool sameWeek = sameYear &&
|
|
!sameDay &&
|
|
now.millisecondsSinceEpoch - dateTime.millisecondsSinceEpoch <
|
|
1000 * 60 * 60 * 24 * 7;
|
|
|
|
if (sameDay) {
|
|
return toTimeString();
|
|
} else if (sameWeek) {
|
|
switch (dateTime.weekday) {
|
|
case 1:
|
|
return "Monday";
|
|
case 2:
|
|
return "Tuesday";
|
|
case 3:
|
|
return "Wednesday";
|
|
case 4:
|
|
return "Thursday";
|
|
case 5:
|
|
return "Friday";
|
|
case 6:
|
|
return "Saturday";
|
|
case 7:
|
|
return "Sunday";
|
|
}
|
|
} else if (sameYear) {
|
|
return "${dateTime.month.toString().padLeft(2, '0')}-${dateTime.day.toString().padLeft(2, '0')}";
|
|
}
|
|
return "${dateTime.year.toString()}-${dateTime.month.toString().padLeft(2, '0')}-${dateTime.day.toString().padLeft(2, '0')}";
|
|
}
|
|
|
|
/// Returns the milliseconds since the Unix epoch.
|
|
num toTimeStamp() {
|
|
return dateTime.millisecondsSinceEpoch;
|
|
}
|
|
|
|
operator <(ChatTime other) {
|
|
return this.toTimeStamp() < other.toTimeStamp();
|
|
}
|
|
|
|
operator >(ChatTime other) {
|
|
return this.toTimeStamp() > other.toTimeStamp();
|
|
}
|
|
|
|
operator >=(ChatTime other) {
|
|
return this.toTimeStamp() >= other.toTimeStamp();
|
|
}
|
|
|
|
operator <=(ChatTime other) {
|
|
return this.toTimeStamp() <= other.toTimeStamp();
|
|
}
|
|
|
|
/// Two message events can belong to the same environment. That means that they
|
|
/// don't need to display the time they were sent because they are close
|
|
/// enaugh.
|
|
static final minutesBetweenEnvironments = 5;
|
|
|
|
/// Checks if two ChatTimes are close enough to belong to the same
|
|
/// environment.
|
|
bool sameEnvironment(ChatTime prevTime) {
|
|
return toTimeStamp() - prevTime.toTimeStamp() <
|
|
1000 * 60 * minutesBetweenEnvironments;
|
|
}
|
|
|
|
/// Returns a simple time String.
|
|
String toTimeString() {
|
|
return "${_z(dateTime.hour % 12)}:${_z(dateTime.minute)} ${dateTime.hour > 11 ? 'pm' : 'am'}";
|
|
}
|
|
|
|
/// If the ChatTime is today, this returns [toTimeString()], if not it also
|
|
/// shows the date.
|
|
String toEventTimeString() {
|
|
DateTime now = DateTime.now();
|
|
|
|
bool sameYear = now.year == dateTime.year;
|
|
|
|
bool sameDay =
|
|
sameYear && now.month == dateTime.month && now.day == dateTime.day;
|
|
|
|
if (sameDay) return toTimeString();
|
|
return "${toString()}, ${toTimeString()}";
|
|
}
|
|
|
|
static String _z(int i) => i < 10 ? "0${i.toString()}" : i.toString();
|
|
}
|