code.octet-stream.net Git - broadcaster/blob - server/files.go

   1 package main
   2
   3 import (
   4         "crypto/sha256"
   5         "encoding/hex"
   6         "io"
   7         "log"
   8         "os"
   9         "path/filepath"
  10         "sync"
  11 )
  12
  13 type FileSpec struct {
  14         Name string
  15         Hash string
  16 }
  17
  18 type AudioFiles struct {
  19         path       string
  20         list       []FileSpec
  21         changeWait chan bool
  22         filesMutex sync.Mutex
  23 }
  24
  25 var files AudioFiles
  26
  27 func InitAudioFiles(path string) {
  28         files.changeWait = make(chan bool)
  29         files.path = path
  30         log.Println("initing audio files")
  31         files.Refresh()
  32         log.Println("done")
  33 }
  34
  35 func (r *AudioFiles) Refresh() {
  36         entries, err := os.ReadDir(r.path)
  37         if err != nil {
  38                 log.Println("couldn't read dir", r.path)
  39                 return
  40         }
  41         r.filesMutex.Lock()
  42         defer r.filesMutex.Unlock()
  43         r.list = nil
  44         for _, file := range entries {
  45                 f, err := os.Open(filepath.Join(r.path, file.Name()))
  46                 if err != nil {
  47                         log.Println("couldn't open", file.Name())
  48                         return
  49                 }
  50                 hash := sha256.New()
  51                 io.Copy(hash, f)
  52                 r.list = append(r.list, FileSpec{Name: file.Name(), Hash: hex.EncodeToString(hash.Sum(nil))})
  53         }
  54         log.Println("Files updated", r.list)
  55         close(files.changeWait)
  56         files.changeWait = make(chan bool)
  57 }
  58
  59 func (r *AudioFiles) Path() string {
  60         return r.path
  61 }
  62
  63 func (r *AudioFiles) Files() []FileSpec {
  64         r.filesMutex.Lock()
  65         defer r.filesMutex.Unlock()
  66         return r.list
  67 }
  68
  69 func (r *AudioFiles) Delete(filename string) {
  70         path := filepath.Join(r.path, filepath.Base(filename))
  71         if filepath.Clean(r.path) != filepath.Clean(path) {
  72                 os.Remove(path)
  73                 r.Refresh()
  74         }
  75 }
  76
  77 func (r *AudioFiles) WatchForChanges() ([]FileSpec, chan bool) {
  78         r.filesMutex.Lock()
  79         defer r.filesMutex.Unlock()
  80         return r.list, r.changeWait
  81 }