db_construction_site/lib/src/models/construction_report.dart

import 'package:json_annotation/json_annotation.dart';

part 'construction_report.g.dart';

@JsonSerializable(createToJson: false)
class ConstructionReport {
  final String id;
  @JsonKey(name: 'nr', fromJson: int.parse)
  final int index;

  @JsonKey(name: 'termin', fromJson: _parseListOrString)
  final List<String> timePeriodTexts;
  @JsonKey(name: 'termin_pins', fromJson: _parseListOrString)
  final List<String> timePeriodPinsTexts;
  @JsonKey(name: 'termin_zeit', fromJson: _parseListOrString)
  final List<String> timePeriodTimeTexts;

  final String headline;
  final String headlinePins;

  @JsonKey(name: 'meldung', fromJson: _parseListOrString)
  final List<String> messages;
  @JsonKey(name: 'meldung_pins', fromJson: _parseListOrString)
  final List<String> messagesPins;
  @JsonKey(name: 'meldung_hinweis', fromJson: _parseListOrString)
  final List<String> messagesHint;

  @JsonKey(name: 'hinweis_tabelle', fromJson: _parseListOrString)
  final List<String> hintTable;

  @JsonKey(name: 'grund')
  final String reason;

  @JsonKey(name: 'abschnitt')
  final List<String> affectedStations;

  final DateTime lastChange;

  @JsonKey(name: 'ics')
  final String icsUrl;

  @JsonKey(name: 'termine', fromJson: _parseTimeRanges)
  final List<TimeRange> timeRanges;

  @JsonKey(name: 'von')
  final DateTime startDate;
  @JsonKey(name: 'bis')
  final DateTime endDate;

  ConstructionReport(
      {this.id,
      this.index,
      this.timePeriodTexts,
      this.timePeriodPinsTexts,
      this.timePeriodTimeTexts,
      this.headline,
      this.headlinePins,
      this.messages,
      this.messagesPins,
      this.messagesHint,
      this.hintTable,
      this.reason,
      this.affectedStations,
      this.lastChange,
      this.icsUrl,
      this.timeRanges,
      this.startDate,
      this.endDate});

  factory ConstructionReport.fromJson(Map<String, dynamic> json) =>
      _$ConstructionReportFromJson(json);

  static List<TimeRange> _parseTimeRanges(List<dynamic> ranges) {
    return ranges.map((range) => TimeRange._fromJson(range)).toList();
  }

  static List<String> _parseListOrString(dynamic input) {
    switch (input.runtimeType) {
      case String:
        return [input];
      case List:
        return input;
      default:
        return [input.toString()];
    }
  }
}

class TimeRange {
  final DateTime begin;
  final DateTime end;

  final bool allDay;

  final List<int> weekdays;

  const TimeRange({this.begin, this.end, this.allDay, this.weekdays});

  TimeRange._fromJson(Map<String, dynamic> json)
      : begin = _parseTimeStamp(json, 'von'),
        end = _parseTimeStamp(json, 'bis'),
        allDay = json['ganztaegig'] == '1',
        weekdays = json['wochentage'] is List
            ? (json['wochentage'] as List<dynamic>)
                .map((day) => int.parse(day))
                .toList()
            : null;

  static DateTime _parseTimeStamp(Map<String, dynamic> json, String suffix) {
    return DateTime.parse(
        "${json["datum_$suffix"]} ${json["st_$suffix"]}:${json["min_$suffix"]}:00");
  }
}