cue-parser/lib/cue.js

A simple js library to parse cue sheet

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.parse = void 0;
/**
 * Main library
 */
const fs = require("fs");
const chardet = require("chardet");
const command_1 = require("./command");
const cuesheet_1 = require("./cuesheet");
const commandMap = {
    CATALOG: parseCatalog,
    CDTEXTFILE: parseCdTextFile,
    FILE: parseFile,
    FLAGS: parseFlags,
    INDEX: parseIndex,
    ISRC: parseIsrc,
    PERFORMER: parsePerformer,
    POSTGAP: parsePostgap,
    PREGAP: parsePregap,
    REM: parseRem,
    SONGWRITER: parseSongWriter,
    TITLE: parseTitle,
    TRACK: parseTrack
};
/**
 * Parse function
 * @param filename Filename path to cue-sheet to be parsed
 * @return CUE-sheet information object
 */
function parse(filename) {
    const cuesheet = new cuesheet_1.CueSheet();
    if (!filename) {
        console.log('no file name specified for parse');
        return;
    }
    if (!fs.existsSync(filename)) {
        throw new Error('file ' + filename + ' does not exist');
    }
    cuesheet.encoding = chardet.detect(fs.readFileSync(filename));
    let encoding = 'utf8';
    if (cuesheet.encoding.startsWith('ISO-8859-')) {
        encoding = 'binary';
    }
    else if (cuesheet.encoding.toUpperCase() === 'UTF-16 LE') {
        encoding = 'utf16le';
    }
    const lines = fs.readFileSync(filename, { encoding, flag: 'r' })
        .replace(/\r\n/, '\n').split('\n');
    lines.forEach(line => {
        if (!line.match(/^\s*$/)) {
            const lineParser = command_1.parseCommand(line);
            commandMap[lineParser.command](lineParser.params, cuesheet);
        }
    });
    if (!cuesheet.files[cuesheet.files.length - 1].name) {
        cuesheet.files.pop();
    }
    return cuesheet;
}
exports.parse = parse;
function parseCatalog(params, cuesheet) {
    cuesheet.catalog = params[0];
}
function parseCdTextFile(params, cuesheet) {
    cuesheet.cdTextFile = params[0];
}
function parseFile(params, cuesheet) {
    let file = cuesheet.getCurrentFile();
    if (!file || file.name) {
        file = cuesheet.newFile();
    }
    file.name = params[0];
    file.type = params[1];
}
function parseFlags(params, cueSheet) {
    const track = cueSheet.getCurrentTrack();
    if (!track) {
        throw new Error('No track for adding flag: ' + params);
    }
    track.flags = params.slice(0);
}
function parseIndex(params, cueSheet) {
    const _number = parseInt(params[0], 10);
    const time = parseTime(params[1]);
    const track = cueSheet.getCurrentTrack();
    if (!track) {
        throw new Error('No track found for index ' + params);
    }
    if (track.postgap) {
        throw new Error('POSTGAP should be after all indexes');
    }
    if (_number < 0 || _number > 99) {
        throw new Error(`Index number must between 0 and 99: ${_number}`);
    }
    if (_number === 1) {
        // Assign track to current file
        const file = cueSheet.getCurrentFile();
        if (!file.tracks) {
            file.tracks = [];
        }
        file.tracks.push(track);
    }
    if (!track.indexes) {
        if (_number > 2) {
            throw new Error(`Invalid index number ${_number}, First index number must be 0 or 1`);
        }
        track.indexes = [];
    }
    else {
        if (_number !== track.indexes[track.indexes.length - 1].number + 1) {
            throw new Error(`Invalid index number: ${_number}, it should follow the last sequence`);
        }
    }
    track.indexes.push(new cuesheet_1.Index(_number, time));
}
function parseIsrc(params, cueSheet) {
    const track = cueSheet.getCurrentTrack();
    if (!track) {
        throw new Error('No track for adding isrc: ' + params);
    }
    track.isrc = params[0];
}
function parsePerformer(params, cueSheet) {
    const track = cueSheet.getCurrentTrack();
    if (!track) {
        cueSheet.performer = params[0];
    }
    else {
        track.performer = params[0];
    }
}
function parsePostgap(params, cueSheet) {
    const track = cueSheet.getCurrentTrack();
    if (!track) {
        throw new Error('POSTGAP can only used in TRACK');
    }
    if (track.postgap) {
        throw new Error('only one POSTGAP is allowed for a track');
    }
    track.postgap = parseTime(params[0]);
}
function parsePregap(params, cueSheet) {
    const track = cueSheet.getCurrentTrack();
    if (!track) {
        throw new Error('PREGAP can only used in TRACK');
    }
    if (track.pregap) {
        throw new Error('only one PREGAP is allowed for a track');
    }
    if (track.indexes && track.indexes.length > 0) {
        throw new Error('PREGAP should be before any INDEX');
    }
    track.pregap = parseTime(params[0]);
}
function parseRem(params, cueSheet) {
    if (!cueSheet.rem) {
        cueSheet.rem = [];
    }
    cueSheet.rem.push(params.join(' '));
}
function parseSongWriter(params, cueSheet) {
    const track = cueSheet.getCurrentTrack();
    if (!track) {
        cueSheet.songWriter = params[0];
    }
    else {
        track.songWriter = params[0];
    }
}
function parseTitle(params, cueSheet) {
    const track = cueSheet.getCurrentTrack();
    if (!track) {
        cueSheet.title = params[0];
    }
    else {
        track.title = params[0];
    }
}
function parseTrack(params, cuesheet) {
    const _number = parseInt(params[0], 10);
    cuesheet.newTrack(_number, params[1]);
}
function parseTime(timeSting) {
    const timePattern = /^(\d{2,}):(\d{2}):(\d{2})$/;
    const parts = timeSting.match(timePattern);
    if (!parts) {
        throw new Error(`Invalid time format: ${timeSting}`);
    }
    const time = new cuesheet_1.Time();
    time.min = parseInt(parts[1], 10);
    time.sec = parseInt(parts[2], 10);
    time.frame = parseInt(parts[3], 10);
    if (time.sec > 59) {
        throw new Error(`Time second should be less than 60: ${timeSting}`);
    }
    if (time.frame > 74) {
        throw new Error(`Time frame should be less than 75: ${timeSting}`);
    }
    return time;
}
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