index.js

import process from "node:process";
import { promises as fs } from "node:fs";

//from coursework
// const content = await fs.readFile(path, "utf-8");
// const countOfWordsContainingEs = content
//   .split(" ")
//   .filter((word) => word.includes("e"))
//   .length;
// console.log(countOfWordsContainingEs);

function countHelper(inputFiles) {
    return {
        lines: inputFiles.split('\n').length - 1,
        words: inputFiles.split(' ').filter(w => w !== "").length,
        bytes: inputFiles.length,
    };
}


// * `wc -l sample-files/3.txt`
// * `wc -l sample-files/*`
async function countLines(listOfFiles) {
    for (const file of listOfFiles) {
        const content = await fs.readFile(file, "utf-8");

        // const linesNumbered = content.split('\n').length-1
        const counts = countHelper(content);
        console.log(`${counts.lines} ${file}`)
    }
}

// * `wc -w sample-files/3.txt`
async function countWords(listOfFiles) {
    for (const file of listOfFiles) {
        const content = await fs.readFile(file, "utf-8");
        
        // const wordsCounted = content.split(" ").filter(word => word !== "").length;
        // console.log(`${wordsCounted} ${file}`);
        const counts = countHelper(content);
        console.log(`${counts.words} ${file}`);
}
    
}

// * `wc -c sample-files/3.txt`
async function countBytes(listOfFiles) {
    for (const file of listOfFiles) {
        const content = await fs.readFile(file, "utf-8");
        // const bytesCounted = content.length;
        const counts = countHelper(content);
        console.log(`${counts.bytes} ${file}`);
    }
}

// * `wc sample-files/*`
async function countAll(listOfFiles) {
    for (const file of listOfFiles) {
        const content = await fs.readFile(file, "utf-8");
        const counts = countHelper(content)

        console.log(`${counts.lines} ${counts.words} ${counts.bytes} ${file}`);
    }
}

const argv = process.argv.slice(2);
const files = argv.filter(arg => !arg.startsWith('-'));

if (argv.includes('-l')) {
    await countLines(files);
} else if (argv.includes('-w')) {
    await countWords(files);
} else if (argv.includes('-c')) {
    await countBytes(files);
} else {
    await countAll(files);
}