'use strict'

const express = require('express')
const fs = require('fs')
const path = require('path')
const sqlite3 = require('sqlite3').verbose()
const app = express()
const port = 3000
const repositoryDirectory = './user-content-access/'
const dbFile = './gitcub.db'

app.set('view engine', 'pug')
app.set('views', './views')

const directoryExists = (path) => fs.existsSync(path) ? fs.statSync(path).isDirectory() : false

const repositoryExists = (name, rows) => {
  return directoryExists(repositoryDirectory + name) &&
  rows.some(x => x.name == name)
}

var db = new sqlite3.Database(dbFile, sqlite3.OPEN_READWRITE)

app.get('*', (req, res) => {
  
  db.all('select name from repositories', (err, rows) => {
  
    if (req.originalUrl.indexOf('\0') == -1) {
      
      let pathNormalized = path.normalize(req.path)

      let pathArray = pathNormalized.split('/').filter((x) => x.length > 0)
      
      let pathIsValid = (pathArray) => {
        if (pathArray.length > 0) {
          if (repositoryExists(pathArray[0], rows)) {
            if (directoryExists(repositoryDirectory + pathArray.join('/'))) {
              return true
            }
            else return false
          }
          else return false
        }
        else return false
      }
      
      if (pathIsValid(pathArray)) {
        
        var dirList = fs.readdirSync(repositoryDirectory + pathArray.join('/'), (err, files) => {
          if (err)
            console.log(err)
          else
            return files
        })
        
        res.render('index', {
          dirList: dirList
        })
      }

      else res.send('Repository does not exist.')

    }

    else res.send('Null byte found in url. Nice try :)')

  })
  
})

app.listen(port, () => {
  console.log(`Example app listening on port ${port}`)
})