Cacher is the code snippet organizer for pro developers

const util = require('util')

const path = require('path')
const fs = require('fs')
const fsStat = util.promisify(fs.stat)
const exec = util.promisify(require('child_process').exec);



fs.readdir('.', async (err, files) => {
    const commitsPerFolders = (await Promise.all(files.map(countCommitsByAuthorInFolder))).filter(c => c)
    console.log(commitsPerFolders)
    console.log('----------------------')
    console.log()
    const allSummed = sumAllCommits(commitsPerFolders)
    const highscore = Object.entries(allSummed)
        .sort((a,b) => a[1] < b[1] ? 1 : -1)
        .forEach(([author, commits]) => console.log(`${author}: ${commits}`))

})

async function isFolder(file) {
    const stat = await fsStat(file)
    return !stat.isFile()
}

async function countCommitsByAuthorInFolder(file) {
    if (await isFolder(file)) {
        const {stdout, stderr} = await exec(`cd ${file} && git shortlog -s -n --all --no-merges`)
        const lines = splitLinesAndTrim(stdout).filter(l => l)

        return lines.map(line => line.split('\t')).reduce((acc, [commits, author]) => {
            if(author) acc[author] = parseInt(commits)
            return acc
        }, {})
    }
}

function splitLinesAndTrim(str) {
    return str.split('\n').map(s => s.trim())
}

function sumAllCommits(commitsPerFolders) {
    return commitsPerFolders.reduce((acc, folderCommits) => {
        Object.entries(folderCommits).forEach(([author, commits]) => {
            if (acc[author]) 
                acc[author] = acc[author] + commits
            else 
                acc[author] = commits
        })
        return acc
    }, {})
}