114 lines
3.6 KiB
JavaScript
114 lines
3.6 KiB
JavaScript
/*jshint esversion: 6 */
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/**
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* https://regex101.com/r/XwBLUH/2
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* This regex parses out the following groups:
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* trackl track number at the left of the timestamp, optional and optionally enclosed in square brackets or parantheses
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* trackr track number at the of the timestamp, optional and optionally enclosed in square brackets or parantheses
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*
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* start_ts: complete track start timestamp (hh:mm:ss) (mm:ss is minimum)
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* start_hh: starting hh, optional
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* start_mm: starting minutes, required
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* start_ss: starting seconds, required
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*
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* end_ts: complete track end timestamp (hh:mm:ss) (mm:ss is minimum to match). optional
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* end:hh: track end hour, optional
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* end:mm: track end minute, optional
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* end:ss: track end seconds, optional
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*
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* text_1: text found to the left of the timestamp, ignoring the track number
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* text_2: text found to the right of the timestamp, ignoring the track number
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*
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* It is suggested to check their lengths and pick one to parse as the Track Title
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*/
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const TS_REGEX = /^((?<trackl>\d{1,3})\.)? *(?<text_1>.*?) *[\(\[]?(?<start_ts>((?<start_hh>\d{1,2}):)?(?<start_mm>\d{1,2}):(?<start_ss>\d{1,2})) *-? *[\)\]]?(?<end_ts>(?<end_hh>\d{1,2}:)?(?<end_mm>\d{1,2}):(?<end_ss>\d{1,2}))? *((?<trackr>\d{1,3})\.)? *(?<text_2>.*?)$/;
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import getArtistTitle from 'get-artist-title'
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var _options = {};
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function convertTime(h,m,s) {
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return (+h) * 60 * 60 + (+m) * 60 + (+s)
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}
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var filterTimestamp = function(line) {
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return TS_REGEX.test(line)
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};
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var firstPass = function(line) {
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let matches = line.match(TS_REGEX);
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let track = matches.groups['trackl'] ? +matches.groups['trackl'] : (matches.groups['trackr'] ? +matches.groups['trackr'] : null)
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return {
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track: track,
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start: {
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ts: matches.groups['start_ts'].length<6 ? `00:${matches.groups['start_ts']}` : matches.groups['start_ts'],
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hh: matches.groups['start_hh'] ? +matches.groups['start_hh'] : 0,
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// These 2 are always set
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mm: +matches.groups['start_mm'],
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ss: +matches.groups['start_ss'],
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},
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end: (matches.groups['end_ts']!==undefined ? {
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ts: matches.groups['end_ts']? matches.groups['end_ts'] : null,
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hh: matches.groups['end_hh']? +matches.groups['end_hh'] : null,
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mm: matches.groups['end_mm']? +matches.groups['end_mm'] : null,
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ss: matches.groups['end_ss']? +matches.groups['end_ss'] : null,
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} : null),
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_: {
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left_text: matches.groups['text_1'],
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right_text: matches.groups['text_2']
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}
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}
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};
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var calcTimestamp = function(obj) {
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if(obj.end) {
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obj.end.calc = convertTime(obj.end.hh,obj.end.mm,obj.end.ss)
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}
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obj.start.calc = convertTime(obj.start.hh,obj.start.mm,obj.start.ss)
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return obj
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}
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var parseTitle = function(obj) {
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obj.title = obj._.left_text.length > obj._.right_text.length
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? obj._.left_text : obj._.right_text;
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return obj
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}
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var parseArtist = function(obj) {
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let [artist, title] = getArtistTitle(obj.title, {
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defaultArtist: _options.artist,
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defaultTitle: obj.title
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});
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obj.artist = artist
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obj.title = title
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return obj
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};
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var addTrack = function(obj, index) {
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if (obj.track==null) {
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obj.track = index+1
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}
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return obj
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}
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var addEnd = function(obj, index, arr) {
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if (!obj.end) {
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if(arr.length!=index+1) {
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let next = arr[index+1]
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obj.end = next.start
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return obj
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}
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}
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return obj
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}
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export function parse (text, options = { artist: 'Unknown' }) {
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_options = options;
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return text
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.split('\n')
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.filter(filterTimestamp)
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.map(firstPass)
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.map(calcTimestamp)
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.map(parseTitle)
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.map(parseArtist)
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.map(addTrack)
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.map(addEnd)
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}
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