package nvdmirror

import (
  "github.com/rs/zerolog"
  "github.com/rs/zerolog/log"
  "os"
)

// Get file size, in bytes.
func getFileSize(path string) (uint64, error) {
  // verify that full path exists
  if st, err := os.Stat(path); err != nil {
    return 0, err
  } else {
    return uint64(st.Size()), err
  }
}

// Log array of strings.
func logArray(key string, strs []string) {
  // populate array
  a := zerolog.Arr()
  for _, v := range(strs) {
    a.Str(v)
  }

  // log array
  log.Info().Array(key, a).Send()
}

// Get source URL, etag response header, and last-modified response
// header from fetchResult and save them in the given cache.
func saveHeaders(cache Cache, fr fetchResult) error {
  return cache.Set(fr.src, map[string]string {
    "if-none-match": fr.headers.Get("etag"),
    "if-modified-since": fr.headers.Get("last-modified"),
  })
}