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Consider holidays for next schoolday (#1678)
Fixes #1179 --------- Co-authored-by: Jonas Sander <[email protected]>
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app/lib/util/next_schoolday_calculator/next_schoolday_calculator.dart
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,93 @@ | ||
| // Copyright (c) 2022 Sharezone UG (haftungsbeschränkt) | ||
| // Licensed under the EUPL-1.2-or-later. | ||
| // | ||
| // You may obtain a copy of the Licence at: | ||
| // https://joinup.ec.europa.eu/software/page/eupl | ||
| // | ||
| // SPDX-License-Identifier: EUPL-1.2 | ||
|
|
||
| import 'dart:developer'; | ||
|
|
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| import 'package:date/date.dart'; | ||
| import 'package:holidays/holidays.dart'; | ||
| import 'package:sharezone/holidays/holiday_bloc.dart'; | ||
| import 'package:sharezone/util/api/user_api.dart'; | ||
| import 'package:user/user.dart'; | ||
|
|
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| class NextSchooldayCalculator { | ||
| final UserGateway _userGateway; | ||
| final HolidayService _holidayManager; | ||
|
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| NextSchooldayCalculator({ | ||
| required UserGateway userGateway, | ||
| required HolidayService holidayManager, | ||
| }) : _userGateway = userGateway, | ||
| _holidayManager = holidayManager; | ||
|
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| Future<Date?> tryCalculateNextSchoolday() async { | ||
| return tryCalculateXNextSchoolday(inSchooldays: 1); | ||
| } | ||
|
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| Future<Date?> tryCalculateXNextSchoolday({int inSchooldays = 1}) async { | ||
| assert(inSchooldays > 0); | ||
| try { | ||
| final user = await _userGateway.get(); | ||
| final enabledWeekdays = user.userSettings.enabledWeekDays; | ||
| final holidays = await _tryLoadHolidays(user); | ||
| final results = _NextSchooldayCaluclation(enabledWeekdays, holidays) | ||
| .calculate(days: inSchooldays); | ||
| if (results.isEmpty) return Date.today().addDays(1); | ||
| return results.elementAt(inSchooldays - 1); | ||
| } catch (e, s) { | ||
| log('Could not calculate next schoolday: $e\n$s', | ||
| error: e, stackTrace: s); | ||
| return null; | ||
| } | ||
| } | ||
|
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| Future<List<Holiday?>> _tryLoadHolidays(AppUser user) async { | ||
| try { | ||
| return await _holidayManager.load(toStateOrThrow(user.state)); | ||
| } catch (e, s) { | ||
| log('Could not load holidays for calculating next schooldays: $e', | ||
| error: e, stackTrace: s); | ||
| return []; | ||
| } | ||
| } | ||
| } | ||
|
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| class _NextSchooldayCaluclation { | ||
| final EnabledWeekDays enabledWeekdays; | ||
| final List<Holiday?> holidays; | ||
|
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| _NextSchooldayCaluclation(this.enabledWeekdays, this.holidays); | ||
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| List<Date> calculate({int days = 3}) { | ||
| if (enabledWeekdays.getEnabledWeekDaysList().isEmpty) return []; | ||
| List<Date> results = []; | ||
| Date date = Date.today(); | ||
| while (results.length < days) { | ||
| // LOOP TO NEXT DAY | ||
| date = date.addDays(1); | ||
| // CHECKS IF IS HOLIDAY | ||
| if (_isHolidayAt(date)) continue; | ||
| if (!_isSchooldayAt(date)) continue; | ||
| // ADDS DATE TO RESULTS | ||
| results.add(date); | ||
| } | ||
| return results; | ||
| } | ||
|
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| bool _isSchooldayAt(Date date) { | ||
| return enabledWeekdays.getEnabledWeekDaysList().contains(date.weekDayEnum); | ||
| } | ||
|
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| bool _isHolidayAt(Date date) { | ||
| for (final holiday in holidays) { | ||
| Date start = Date.fromDateTime(holiday!.start); | ||
| Date end = Date.fromDateTime(holiday.end); | ||
| if (date.isInsideDateRange(start, end)) return true; | ||
| } | ||
| return false; | ||
| } | ||
| } |
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