emoji-shortcode-converter/lib/index.js

Convert shortcode emojis in text files to characters

const emojis = require('./emojis')
const fs = require('fs')
const regex = /\:(.*?)\:/

module.exports  = {
    convert(fileName){
        if (!fs.existsSync(fileName)){
            console.error("File does not exist!")
            return
        }

        var output = fs.readFileSync(fileName, 'utf8')

        if (!output || output.length === 0){
            console.error("The input file is empty!")
            return
        }

        var done = false
        while (!done){
            matches = [...output.matchAll(regex)]
            if (matches.length == 0){
                done = true
                break
            }
            shortcode = matches[0][0]
            replacement_emoji = emojis[matches[0][1]]
            if (replacement_emoji){
                output = output.replace(shortcode, replacement_emoji.char)
            } else {
                output = output.replace(shortcode, "###NO EMOJI###")
                console.warn(`Missing emoji for shortcode ${shortcode}`)
            }
        }
        output += output[output.length - 1] === '\n' ? '' : '\n'
        process.stdout.write(output)
        console.log("Success!")
    }
}