Kotlin中解析QQ音乐和网易云音乐歌词的工具类

object LyricParser {

    private fun toTimeInSeconds(input: String): Int {
        val timeParts = input.split(":")
        val minutes = timeParts[0].toInt()
        val seconds = timeParts[1].substringBefore(".").toInt()
        return minutes * 60 + seconds
    }

    fun parse(lyric: String): MutableMap<Int, String> {
        val lyricsMap = mutableMapOf<Int, String>()
        var currentLyric = ""
        for (line in lyric.trimIndent().lines()) {
            val parts = line.split("]")
            val times = parts.dropLast(1).map { toTimeInSeconds(it.substring(1).replace(".000", "").trim()) }
            val content = parts.last().trim()
            if (times.isNotEmpty()) {
                for (time in times) {
                    lyricsMap[time] = currentLyric.trim()
                }
                currentLyric = content
            } else {
                currentLyric += " $content"
            }
        }
        val keys = lyricsMap.keys.toList()
        val values = lyricsMap.values.toList()
        keys.dropLast(1)
        val shiftedValues = values.drop(1)
        val shiftedLyricsMap = mutableMapOf<Int, String>()
        for (i in keys.indices) {
            shiftedLyricsMap[keys[i]] = shiftedValues.getOrElse(i) { "" }
        }
        return shiftedLyricsMap
    }

    fun parseQQLyric(lyrics: String): Map<Int, String> {
        val lyricsMap = mutableMapOf<Int, String>()
        val regex = """\[(\d{2}):(\d{2})\.(\d{2})](.*)""".toRegex()
        lyrics.lines().forEach { line ->
            val matchResult = regex.find(line)
            if (matchResult != null) {
                val minute = matchResult.groups[1]?.value?.toInt() ?: 0
                val second = matchResult.groups[2]?.value?.toInt() ?: 0
                val millis = matchResult.groups[3]?.value?.toInt() ?: 0
                val lyricText = matchResult.groups[4]?.value?.trim() ?: ""
                val totalSeconds = minute * 60 + second + if (millis >= 50) 1 else 0
                if (lyricText.isNotEmpty()) {
                    lyricsMap[totalSeconds] = lyricText
                }
            }
        }
        return lyricsMap
    }
}