find hash in openEQUELLA file storage path

hashcode.js

#!/usr/bin/env node
//jshint node:true
// useful for finding location of files on server, for non-advanced storage config location is
// {{data dir}}/Institutions/{{institution name}}/Attachments/${hashCode(uuid)}/${uuid}/${version}
// for advanced storage config it's
// {{data dir}}/Institutions/{{institution name}}/Attachments/${collection UUID}/${hashCode(uuid)}/${uuid}/${version}
const readline = require('readline')

let hashCode = function(str){
	let hash = 0
	if (str.length == 0) return hash
	for (let i = 0; i < str.length; i++) {
		let char = str.charCodeAt(i)
		hash = ((hash<<5)-hash)+char
		hash = hash & hash // Convert to 32bit integer
	}
	return hash & 127
}

if (require && require.main == module) {
    // CLI arguments, no piped data
    if (process.stdin.isTTY) {
        let uuid = process.argv[2]
    	if (uuid) console.log(hashCode(uuid)) && process.exit(0)
    } else {
	// data is being piped through stdin
	const rl = readline.createInterface({ input: process.stdin })
	rl.on('line', uuid => console.log(hashCode(uuid)))
    }
}