kokanu.mjs

#!/usr/bin/env node

// pdf2svg Logography\ for\ Kokanu.pdf input/kokanu_%d.svg all
// node kokanu.mjs pre
// node kokanu.mjs post

import fs from 'fs/promises'
import fsx from 'fs'
import readline from 'readline'

import { spawn } from 'child_process'

const inputDirectory = 'input'
const cleanedDirectory = 'cleaned'
const rasterDirectory = 'raster'

async function removeFluff(inFileName, outFileName)
{
    const fileStream = fsx.createReadStream(`${inputDirectory}/${inFileName}.svg`)

    const lineReader = readline.createInterface(
    {
        input: fileStream,
        crlfDelay: Infinity
    })
    
	const lines = []
    for await (const line of lineReader)
    {
		lines.push(line)
    }
        
	const cleaned = lines
		.filter(line =>
			line.startsWith("<?xml")
			|| line.startsWith("<svg")
			|| line.startsWith("</svg>")
			|| (line.startsWith("<path")
				&& line.includes("stroke-width")))
		.join("\n")
	
	await fs.writeFile(`${cleanedDirectory}/${outFileName}.svg`, cleaned)
}

async function finalize(fileName)
{
	const mogrifySVG = spawn('mogrify', ['-trim', `${cleanedDirectory}/${fileName}.svg`])
	
	await new Promise((resolve, reject) => {
        mogrifySVG.on('close', resolve);
    });
	
	const convertToPNG = spawn('convert', ['-background', 'none', '-format', 'png', `${cleanedDirectory}/${fileName}.svg`, `${rasterDirectory}/${fileName}.png`])
	
	await new Promise((resolve, reject) => {
        convertToPNG.on('close', resolve);
    });
}

let end = false

async function main()
{
	var args = process.argv.slice(2);
	
	const fileStream = fsx.createReadStream(`words.txt`)

    const lineReader = readline.createInterface(
    {
        input: fileStream,
        crlfDelay: Infinity
    })
    
	const words = []
    for await (const line of lineReader)
    {
		words.push(line)
    }
	
	await words.forEach(async (word, i) =>
	{
		if (args[0] == 'pre')
		{
			await removeFluff(`kokanu_${i+3}`, word)
		}
		else if (args[0] == 'post')
		{
			await finalize(word)
		}
	})
	end = true
}

main()

function wait()
{
	if (!end) setTimeout(wait, 1000)
}
wait()