The final part of the SRT subtitle group parser.

srt_group_parser.swift

struct SubtitleGroup {
	var sequenceNumber: Int
	var startTimecode: TimeInterval
	var endTimecode: TimeInterval
	var substring: String
}

let srtGroupParser = Int.parser(isSigned: false)
	.skip(Newline())
	.take(timecodeLineParser)
	.skip(Newline())
	.take(
		PrefixUpTo("\n\n")
			.orElse(PrefixUpTo("\r\n\r\n")) // To handle blank lines on Windows.
			.orElse(Rest()) // For the last group, since there might not be a trailing blank line.
			.utf8 // The trailing `.utf8` here is important. It allows the subtitle body to be parsed
			// as a `Substring`, to get fuller Unicode handling before converting back out to an
			// `Parsers.SubstringToUTF8View`.
	)
	.map { sequenceNumber, timecodes, substring in
		SubtitleGroup(
			sequenceNumber: sequenceNumber,
			startTimecode: timecodes.0,
			endTimecode: timecodes.1,
			substring: String(substring)
		)
	}