A poorly made script that generates a scannable barcode out of unicode characters.

code39.js

#!/usr/bin/env node
//code39.js
//A poorly made script that generates a scannable barcode out of unicode characters
//It was written after I found out that:
//	- https://github.com/osresearch/barcode/ doesn't produce a scannable barcode in just about any font
//	- There is a scannable unicode barcode shown in the unregistered preview of https://medium.com/weekly-webtips/how-to-generate-barcodes-code39-in-unicode-symbols-with-javascript-3d53559b877c

const Version = "1.1.0"
const RawMap = Object.freeze({
	'A': '█▌▌▌*▌█▌',
	'B': '▌█▌▌*▌█▌',
	'C': '█▌█▌▌*▌▌',
	'D': '▌▌█▌*▌█▌',
	'E': '█▌▌█▌*▌▌',
	'F': '▌█▌█▌*▌▌',
	'G': '▌▌▌*█▌█▌',
	'H': '█▌▌▌*█▌▌',
	'I': '▌█▌▌*█▌▌',
	'J': '▌▌█▌*█▌▌',
	'K': '█▌▌▌▌*█▌',
	'L': '▌█▌▌▌*█▌',
	'M': '█▌█▌▌▌*▌',
	'N': '▌▌█▌▌*█▌',
	'O': '█▌▌█▌▌*▌',
	'P': '▌█▌█▌▌*▌',
	'Q': '▌▌▌█▌*█▌',
	'R': '█▌▌▌█▌*▌',
	'S': '▌█▌▌█▌*▌',
	'T': '▌▌█▌█▌*▌',
	'U': '█▌*▌▌▌█▌',
	'V': '▌*█▌▌▌█▌',
	'W': '█▌*█▌▌▌▌',
	'X': '▌*▌█▌▌█▌',
	'Y': '█▌*▌█▌▌▌',
	'Z': '▌*█▌█▌▌▌',
	'0': '▌▌*█▌█▌▌',
	'1': '█▌▌*▌▌█▌',
	'2': '▌█▌*▌▌█▌',
	'3': '█▌█▌*▌▌▌',
	'4': '▌▌*█▌▌█▌',
	'5': '█▌▌*█▌▌▌',
	'6': '▌█▌*█▌▌▌',
	'7': '▌▌*▌█▌█▌',
	'8': '█▌▌*▌█▌▌',
	'9': '▌█▌*▌█▌▌',
	' ': '▌*█▌▌█▌▌',
	'-': '▌*▌▌█▌█▌',
	'$': '▌*▌*▌*▌▌',
	'%': '▌▌*▌*▌*▌',
	'.': '█▌*▌▌█▌▌',
	'/': '▌*▌*▌▌*▌',
	'+': '▌*▌▌*▌*▌'
});
const AsciiMap = Object.freeze({
	'\x00': RawMap['%'] + RawMap['U'],
	'\x01': RawMap['$'] + RawMap['A'],
	'\x02': RawMap['$'] + RawMap['B'],
	'\x03': RawMap['$'] + RawMap['C'],
	'\x04': RawMap['$'] + RawMap['D'],
	'\x05': RawMap['$'] + RawMap['E'],
	'\x06': RawMap['$'] + RawMap['F'],
	'\x07': RawMap['$'] + RawMap['G'],
	'\x08': RawMap['$'] + RawMap['H'],
	'\x09': RawMap['$'] + RawMap['I'],
	'\x0A': RawMap['$'] + RawMap['J'],
	'\x0B': RawMap['$'] + RawMap['K'],
	'\x0C': RawMap['$'] + RawMap['L'],
	'\x0D': RawMap['$'] + RawMap['M'],
	'\x0E': RawMap['$'] + RawMap['N'],
	'\x0F': RawMap['$'] + RawMap['O'],
	'\x10': RawMap['$'] + RawMap['P'],
	'\x11': RawMap['$'] + RawMap['Q'],
	'\x12': RawMap['$'] + RawMap['R'],
	'\x13': RawMap['$'] + RawMap['S'],
	'\x14': RawMap['$'] + RawMap['T'],
	'\x15': RawMap['$'] + RawMap['U'],
	'\x16': RawMap['$'] + RawMap['V'],
	'\x17': RawMap['$'] + RawMap['W'],
	'\x18': RawMap['$'] + RawMap['X'],
	'\x19': RawMap['$'] + RawMap['Y'],
	'\x1A': RawMap['$'] + RawMap['Z'],
	'\x1B': RawMap['%'] + RawMap['A'],
	'\x1C': RawMap['%'] + RawMap['B'],
	'\x1D': RawMap['%'] + RawMap['C'],
	'\x1E': RawMap['%'] + RawMap['D'],
	'\x1F': RawMap['%'] + RawMap['E'],
	'\x20': RawMap[' '],
	'\x21': RawMap['/'] + RawMap['A'],
	'\x22': RawMap['/'] + RawMap['B'],
	'\x23': RawMap['/'] + RawMap['C'],
	'\x24': RawMap['/'] + RawMap['D'],
	'\x25': RawMap['/'] + RawMap['E'],
	'\x26': RawMap['/'] + RawMap['F'],
	'\x27': RawMap['/'] + RawMap['G'],
	'\x28': RawMap['/'] + RawMap['H'],
	'\x29': RawMap['/'] + RawMap['I'],
	'\x2A': RawMap['/'] + RawMap['J'],
	'\x2B': RawMap['/'] + RawMap['K'],
	'\x2C': RawMap['/'] + RawMap['L'],
	'\x2D': RawMap['-'],
	'\x2E': RawMap['.'],
	'\x2F': RawMap['/'] + RawMap['O'],
	'\x30': RawMap['0'],
	'\x31': RawMap['1'],
	'\x32': RawMap['2'],
	'\x33': RawMap['3'],
	'\x34': RawMap['4'],
	'\x35': RawMap['5'],
	'\x36': RawMap['6'],
	'\x37': RawMap['7'],
	'\x38': RawMap['8'],
	'\x39': RawMap['9'],
	'\x3A': RawMap['/'] + RawMap['Z'],
	'\x3B': RawMap['%'] + RawMap['F'],
	'\x3C': RawMap['%'] + RawMap['G'],
	'\x3D': RawMap['%'] + RawMap['H'],
	'\x3E': RawMap['%'] + RawMap['I'],
	'\x3F': RawMap['%'] + RawMap['J'],
	'\x40': RawMap['%'] + RawMap['V'],
	'\x41': RawMap['A'],
	'\x42': RawMap['B'],
	'\x43': RawMap['C'],
	'\x44': RawMap['D'],
	'\x45': RawMap['E'],
	'\x46': RawMap['F'],
	'\x47': RawMap['G'],
	'\x48': RawMap['H'],
	'\x49': RawMap['I'],
	'\x4A': RawMap['J'],
	'\x4B': RawMap['K'],
	'\x4C': RawMap['L'],
	'\x4D': RawMap['M'],
	'\x4E': RawMap['N'],
	'\x4F': RawMap['O'],
	'\x50': RawMap['P'],
	'\x51': RawMap['Q'],
	'\x52': RawMap['R'],
	'\x53': RawMap['S'],
	'\x54': RawMap['T'],
	'\x55': RawMap['U'],
	'\x56': RawMap['V'],
	'\x57': RawMap['W'],
	'\x58': RawMap['X'],
	'\x59': RawMap['Y'],
	'\x5A': RawMap['Z'],
	'\x5B': RawMap['%'] + RawMap['K'],
	'\x5C': RawMap['%'] + RawMap['L'],
	'\x5D': RawMap['%'] + RawMap['M'],
	'\x5E': RawMap['%'] + RawMap['N'],
	'\x5F': RawMap['%'] + RawMap['O'],
	'\x60': RawMap['%'] + RawMap['W'],
	'\x61': RawMap['+'] + RawMap['A'],
	'\x62': RawMap['+'] + RawMap['B'],
	'\x63': RawMap['+'] + RawMap['C'],
	'\x64': RawMap['+'] + RawMap['D'],
	'\x65': RawMap['+'] + RawMap['E'],
	'\x66': RawMap['+'] + RawMap['F'],
	'\x67': RawMap['+'] + RawMap['G'],
	'\x68': RawMap['+'] + RawMap['H'],
	'\x69': RawMap['+'] + RawMap['I'],
	'\x6A': RawMap['+'] + RawMap['J'],
	'\x6B': RawMap['+'] + RawMap['K'],
	'\x6C': RawMap['+'] + RawMap['L'],
	'\x6D': RawMap['+'] + RawMap['M'],
	'\x6E': RawMap['+'] + RawMap['N'],
	'\x6F': RawMap['+'] + RawMap['O'],
	'\x70': RawMap['+'] + RawMap['P'],
	'\x71': RawMap['+'] + RawMap['Q'],
	'\x72': RawMap['+'] + RawMap['R'],
	'\x73': RawMap['+'] + RawMap['S'],
	'\x74': RawMap['+'] + RawMap['T'],
	'\x75': RawMap['+'] + RawMap['U'],
	'\x76': RawMap['+'] + RawMap['V'],
	'\x77': RawMap['+'] + RawMap['W'],
	'\x78': RawMap['+'] + RawMap['X'],
	'\x79': RawMap['+'] + RawMap['Y'],
	'\x7A': RawMap['+'] + RawMap['Z'],
	'\x7B': RawMap['%'] + RawMap['P'],
	'\x7C': RawMap['%'] + RawMap['Q'],
	'\x7D': RawMap['%'] + RawMap['R'],
	'\x7E': RawMap['%'] + RawMap['S'],
	//idk which to use so we just pick a random one on startup because why not
	'\x7F': [RawMap['%'] + RawMap['T'], RawMap['%'] + RawMap['X'], RawMap['%'] + RawMap['Y'], RawMap['%'] + RawMap['Z']][Math.floor(Math.random() * 4)]
});
const Marker = "▌*▌█▌█▌▌";// 
let Map = null;

function PrintHelp() {
	console.log(`code39.js (version ${Version})\n`);
	console.log("usage:");
	console.log("	code39 [input]");
	console.log("	code39 -r [input]");
	console.log("	code39 -s [space length] [input]");
	console.log("	code39 -rs [space length] [input]");
	//Also there's a hidden mode for discord that minimises barcode size by using spoilers and other formatting
}

function CheckArgs() {
	if (process.argv[2 + argOffset] == undefined) {
		PrintHelp();
		process.exit(1);
	}
}

//let process = {argv: ["", "", "test"]};
let input = "";
let spaceCount = 1;
let argOffset = 0;
switch (process.argv[2]) {
	case undefined:
	case "-h":
		PrintHelp()
		process.exit(0);
		break;
	case "-s":
	case "-sr":
	case "-rs":
		spaceCount = parseInt(process.argv[3]);
		if (process.argv[3] == "d") {
			spaceCount = 2;
		}
		argOffset++;
		if (isNaN(spaceCount) || spaceCount < 0) {
			PrintHelp();
			process.exit(1);
		}
	case "-r":
		argOffset++;
		if (process.argv[2] != "-s") {
			CheckArgs();
			input = process.argv[2 + argOffset].toUpperCase().split("");
			Map = RawMap;
			break;
		}
	default:
		CheckArgs();
		input = process.argv[2 + argOffset].split("");
		Map = AsciiMap;
}
let output = Marker.replaceAll("*", " ".repeat(spaceCount));

for (let i = 0; i < input.length; i++) {
	output += Map[input[i]].replaceAll("*", " ".repeat(spaceCount));
}
output += Marker.replaceAll("*", " ".repeat(spaceCount));

if (process.argv[3] == "d") {
	output = "-# " + output.replaceAll("▌", "|| || ").replaceAll("█", "||  ||");
}

console.log(output);