const crypto = require('crypto')
const fs = require('fs')

function calculateFileMD5(filePath) {
    return new Promise((resolve, reject) => {
        const hash = crypto.createHash('md5')
        const stream = fs.createReadStream(filePath)

        stream.on('data', (data) => hash.update(data))
        stream.on('end', () => resolve(hash.digest('hex')))
        stream.on('error', (error) => reject(error))
    })
}

module.exports = { calculateFileMD5 }