bjarg.js

const fs = require("fs")
const dictionary = ["if", "print"]
const allowedAscii = [13]

const bjargs = []

fs.readdir(`./`, (err, files) => {
    if (err) throw err;
    files.forEach(file => {
        if (file.endsWith(".bjarg")) bjargs.push(file)
    })

    if (bjargs.length === 0) throw new Error("Couldn't find a bjarg file.")

    if (bjargs.length < 1) {
        if (bjargs.includes("main.bjarg")) {
            execute(fs.readFileSync(`./main.bjarg`))
        } else throw new Error("Found multiple bjargs. Rename one of them 'main.bjarg'")
    } else {
        execute(fs.readFileSync(`./${bjargs[0]}`))
    }
})

function execute(file) {

    const lines = {}
    /**
     * @type {Array}
     */
    const arrayOflines = file.toString().split("\n")
    
    for (let i = 0; i < arrayOflines.length; i++) {
        lines[i] = arrayOflines[i];
    }

    for (let atLine in lines) {

        let line = lines[atLine]

        if (atLine != arrayOflines.length - 1) lines[atLine] = line.substring(0, line.length - 1)

        const lineBefore = lines[atLine - 1]

        if (lineBefore === undefined) executeLine(line)
        else {
            const syntax = lineBefore.split(" ")[0]
            const value = lineBefore.split(" ")[1]

            if (syntax === "if") {
                if (value !== "no") {
                    executeLine(line)
                }
            } else {
                executeLine(line)
            }
        }
    }
}

function executeLine(line) {
    const cmd = line.split(" ")[0]
    const content = line.split(" ").slice(1).join(" ")

    if (!dictionary.includes(cmd)) {
        if (!allowedAscii.includes(cmd.charCodeAt(0))) {
            throw new Error(`Unknown statement '${cmd}'`)   
        }
    }
    
    if (line.startsWith("print")) console.log(content)
}