lrc-kit
Version:
lrc parser, maker, runner
140 lines (139 loc) • 4.59 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
var line_parser_1 = require("./line-parser");
function padZero(num, size) {
if (size === void 0) { size = 2; }
while (num.toString().split('.')[0].length < size)
num = '0' + num;
return num;
}
exports.padZero = padZero;
/**
* get lrc time string
* @example
* Lrc.timestampToString(143.54)
* // return '02:23.54':
* @param timestamp second timestamp
*/
function timestampToString(timestamp) {
return padZero(Math.floor(timestamp / 60)) + ":" + padZero((timestamp % 60).toFixed(2));
}
exports.timestampToString = timestampToString;
var Lrc = /** @class */ (function () {
function Lrc() {
this.info = {};
this.lyrics = [];
}
/**
* parse lrc text and return a Lrc object
*/
Lrc.parse = function (text) {
var lyrics = [];
var info = {};
text
.split(/\r\n|[\n\r]/g)
.map(function (line) {
return line_parser_1.parseLine(line);
})
.forEach(function (line) {
switch (line.type) {
case line_parser_1.LineType.INFO:
info[line.key] = line.value;
break;
case line_parser_1.LineType.TIME:
line.timestamps.forEach(function (timestamp) {
lyrics.push({
timestamp: timestamp,
content: line.content,
});
});
break;
default:
break;
}
});
var lrc = new this();
lrc.lyrics = lyrics;
lrc.info = info;
return lrc;
};
Lrc.prototype.offset = function (offsetTime) {
this.lyrics.forEach(function (lyric) {
lyric.timestamp += offsetTime;
if (lyric.timestamp < 0) {
lyric.timestamp = 0;
}
});
};
Lrc.prototype.clone = function () {
function clonePlainObject(obj) {
var newObj = {};
for (var key in obj) {
newObj[key] = obj[key];
}
return newObj;
}
var lrc = new Lrc();
lrc.info = clonePlainObject(this.info);
lrc.lyrics = this.lyrics.reduce(function (ret, lyric) {
ret.push(clonePlainObject(lyric));
return ret;
}, []);
return lrc;
};
/**
* get lrc text
* @param opts.combine lyrics combine by same content
* @param opts.sort lyrics sort by timestamp
* @param opts.lineFormat newline format
*/
Lrc.prototype.toString = function (opts) {
if (opts === void 0) { opts = {}; }
opts.combine = 'combine' in opts ? opts.combine : true;
opts.lineFormat = 'lineFormat' in opts ? opts.lineFormat : '\r\n';
opts.sort = 'sort' in opts ? opts.sort : true;
var lines = [], lyricsMap = {}, lyricsList = [];
// generate info
for (var key in this.info) {
lines.push("[" + key + ":" + this.info[key] + "]");
}
if (opts.combine) {
// uniqueness
this.lyrics.forEach(function (lyric) {
if (lyric.content in lyricsMap) {
lyricsMap[lyric.content].push(lyric.timestamp);
}
else {
lyricsMap[lyric.content] = [lyric.timestamp];
}
});
// sorted
for (var content in lyricsMap) {
if (opts.sort) {
lyricsMap[content].sort();
}
lyricsList.push({
timestamps: lyricsMap[content],
content: content,
});
}
if (opts.sort) {
lyricsList.sort(function (a, b) { return a.timestamps[0] - b.timestamps[0]; });
}
// generate lyrics
lyricsList.forEach(function (lyric) {
lines.push("[" + lyric.timestamps
.map(function (timestamp) { return timestampToString(timestamp); })
.join('][') + "]" + (lyric.content || ''));
});
}
else {
this.lyrics.forEach(function (lyric) {
lines.push("[" + timestampToString(lyric.timestamp) + "]" + (lyric.content || ''));
});
}
return lines.join(opts.lineFormat);
};
return Lrc;
}());
exports.Lrc = Lrc;