package main

import(
  "log"
  "io/ioutil"
  "os"
  "path/filepath"
)

func checkRootFolder(storage string) {
  files, err := ioutil.ReadDir(storage)
  if err != nil { log.Fatal(err) }

  checked_folders := map[string]bool{"fs": false, "commits": false, "blocks": false}
  for _, f := range files {
    if _, ok := checked_folders[f.Name()]; ok {
      info, err := os.Stat(filepath.Join(storage, f.Name()));
      if err == nil && info.IsDir() {
        checked_folders[f.Name()] = true
      }
    }
  }

  for path, seen := range checked_folders {
    if !seen { log.Fatal("Folder ", path, " is required but not present!") }
  }
}