getSubtitlesData method

Subtitles getSubtitlesData(String subtitlesContent, SubtitleType subtitleType)

Implementation

Subtitles getSubtitlesData(
  String subtitlesContent,
  SubtitleType subtitleType,
) {
  RegExp regExp;
  if (subtitleType == SubtitleType.webvtt) {
    regExp = RegExp(
      r'((\d{2}):(\d{2}):(\d{2})\.(\d+)) +--> +((\d{2}):(\d{2}):(\d{2})\.(\d{3})).*[\r\n]+\s*((?:(?!\r?\n\r?).)*(\r\n|\r|\n)(?:.*))',
      caseSensitive: false,
      multiLine: true,
    );
  } else if (subtitleType == SubtitleType.srt) {
    regExp = RegExp(
      r'((\d{2}):(\d{2}):(\d{2})\,(\d+)) +--> +((\d{2}):(\d{2}):(\d{2})\,(\d{3})).*[\r\n]+\s*((?:(?!\r?\n\r?).)*(\r\n|\r|\n)(?:.*))',
      caseSensitive: false,
      multiLine: true,
    );
  } else {
    throw Exception('Incorrect subtitle type');
  }

  final matches = regExp.allMatches(subtitlesContent).toList();
  final subtitleList = <Subtitle>[];

  for (final regExpMatch in matches) {
    final startTimeHours = int.parse(regExpMatch.group(2)!);
    final startTimeMinutes = int.parse(regExpMatch.group(3)!);
    final startTimeSeconds = int.parse(regExpMatch.group(4)!);
    final startTimeMilliseconds = int.parse(regExpMatch.group(5)!);

    final endTimeHours = int.parse(regExpMatch.group(7)!);
    final endTimeMinutes = int.parse(regExpMatch.group(8)!);
    final endTimeSeconds = int.parse(regExpMatch.group(9)!);
    final endTimeMilliseconds = int.parse(regExpMatch.group(10)!);
    final text = removeAllHtmlTags(regExpMatch.group(11)!);

    final startTime = Duration(
      hours: startTimeHours,
      minutes: startTimeMinutes,
      seconds: startTimeSeconds,
      milliseconds: startTimeMilliseconds,
    );
    final endTime = Duration(
      hours: endTimeHours,
      minutes: endTimeMinutes,
      seconds: endTimeSeconds,
      milliseconds: endTimeMilliseconds,
    );

    subtitleList.add(
      Subtitle(startTime: startTime, endTime: endTime, text: text.trim()),
    );
  }

  return Subtitles(subtitles: subtitleList);
}