parse method

Implementation

static Future<Vplan> parse(String input) async {
  await intlSymbol.initializeDateFormatting('de', null);

  xml.XmlDocument document;

  try {
    document = xml.parse(input);
  } catch (error) {
    throw ParserError(ParserErrorKind.XMLParserError, error);
  }

  Weekday weekday = null;
  VplanDate date = null;

  for (xml.XmlElement node in document.findAllElements('titel')) {
    List<String> split = node.text.trim().split(', ');

    if (split.length != 2) {
      throw ParserError(ParserErrorKind.MissingElements, 'Incomplete date!');
    }

    try {
      weekday = WeekdayConverter.fromStringDE(split[0]);
    } catch (error) {
      throw ParserError(ParserErrorKind.DateParsingError, error);
    }

    String dateString = split[1];

    WeekType weektype;

    try {
      weektype = WeekTypeConverter.fromStringDE(dateString.substring(dateString.length - 8, dateString.length - 1));
    } catch (error) {
      throw ParserError(ParserErrorKind.DateParsingError, error);
    }

    dateString = dateString.substring(0, dateString.length - 10);

    intl.DateFormat format = new intl.DateFormat.yMMMMd('de');
    DateTime dateTime;

    try {
      dateTime = format.parse(dateString);
    } catch (error) {
      throw ParserError(ParserErrorKind.DateParsingError, error);
    }

    date = VplanDate(dateTime, weektype);
  }

  if (weekday == null) {
    throw ParserError(ParserErrorKind.MissingElements, 'Weekday not found!');
  }

  if (date == null) {
    throw ParserError(ParserErrorKind.MissingElements, 'Date not found!');
  }

  DateTime changed;

  for (xml.XmlElement node in document.findAllElements('datum')) {
    intl.DateFormat format = new intl.DateFormat.yMd('de').add_jm();

    try {
      changed = format.parse(node.text.replaceAll(new RegExp(r','), ''));
    } catch (error) {
      throw ParserError(ParserErrorKind.DateParsingError, error);
    }
  }

  if (changed == null) {
    throw ParserError(ParserErrorKind.DateParsingError, 'Date changed not found!');
  }

  List<DateTime> daysOff = new List();

  for (xml.XmlElement node in document.findAllElements('ft')) {
    DateTime dayOff;

    try {
      dayOff = DateTime.parse('20${node.text}');
    } catch (error) {
      throw ParserError(ParserErrorKind.DateParsingError, error);
    }

    daysOff.add(dayOff);
  }

  List<Change> changes = new List();

  for (xml.XmlElement node in document.findAllElements('aktion')) {
    String form = '';
    String lesson = '';
    String subject = '';
    String teacher = '';
    String room = '';
    String info = '';

    for (xml.XmlElement node in node.findElements('klasse')) {
      form = node.text;
    }

    for (xml.XmlElement node in node.findElements('stunde')) {
      lesson = node.text;
    }

    for (xml.XmlElement node in node.findElements('fach')) {
      subject = node.text;
    }

    for (xml.XmlElement node in node.findElements('lehrer')) {
      teacher = node.text;
    }

    for (xml.XmlElement node in node.findElements('raum')) {
      room = node.text;
    }

    for (xml.XmlElement node in node.findElements('info')) {
      info = node.text;
    }

    changes.add(Change(form, lesson, subject, teacher, room, info));
  }

  List<String> info = new List();

  for (xml.XmlElement node in document.findAllElements('fussinfo')) {
    if (node.text.length > 0) {
      info.add(node.text);
    }
  }

  return Vplan(weekday, date, changed, daysOff, changes, info);
}