enigma-bbs/core/descript_ion_file.js

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/* jslint node: true */
'use strict';
// deps
const fs = require('graceful-fs');
const iconv = require('iconv-lite');
const async = require('async');
module.exports = class DescriptIonFile {
constructor() {
this.entries = new Map();
}
get(fileName) {
return this.entries.get(fileName);
}
getDescription(fileName) {
const entry = this.get(fileName);
if(entry) {
return entry.desc;
}
}
static createFromFile(path, cb) {
fs.readFile(path, (err, descData) => {
if(err) {
return cb(err);
}
const descIonFile = new DescriptIonFile();
// DESCRIPT.ION entries are terminated with a CR and/or LF
const lines = iconv.decode(descData, 'cp437').split(/\r?\n/g);
async.each(lines, (entryData, nextLine) => {
//
// We allow quoted (long) filenames or non-quoted filenames.
// FILENAME<SPC>DESC<0x04><program data><CR/LF>
//
const parts = entryData.match(/^(?:(?:"([^"]+)" )|(?:([^ ]+) ))([^\x04]+)\x04(.)[^\r\n]*$/); // eslint-disable-line no-control-regex
if(!parts) {
return nextLine(null);
}
const fileName = parts[1] || parts[2];
2017-09-02 15:59:38 +00:00
//
// Un-escape CR/LF's
// - escapped \r and/or \n
// - BBBS style @n - See https://www.bbbs.net/sysop.html
//
const desc = parts[3].replace(/\\r\\n|\\n|[^@]@n/g, '\r\n');
descIonFile.entries.set(
fileName,
{
desc : desc,
programId : parts[4],
programData : parts[5],
}
);
return nextLine(null);
},
() => {
return cb(null, descIonFile);
});
});
}
};