git.r.bdr.sh - rbdr/mobius/blob - hotline/file_path.go

   1 package hotline
   2
   3 import (
   4         "encoding/binary"
   5         "strings"
   6 )
   7
   8 const pathSeparator = "/" // File path separator TODO: make configurable to support Windows
   9
  10 // FilePathItem represents the file or directory portion of a delimited file path (e.g. foo and bar in "/foo/bar")
  11 // 00 00
  12 // 09
  13 // 73 75 62 66 6f 6c 64 65 72 // "subfolder"
  14 type FilePathItem struct {
  15         Len  byte
  16         Name []byte
  17 }
  18
  19 func NewFilePathItem(b []byte) FilePathItem {
  20         return FilePathItem{
  21                 Len:  b[2],
  22                 Name: b[3:],
  23         }
  24 }
  25
  26 type FilePath struct {
  27         ItemCount []byte
  28         Items     []FilePathItem
  29 }
  30
  31 func (fp *FilePath) UnmarshalBinary(b []byte) error {
  32         fp.ItemCount = b[0:2]
  33
  34         pathData := b[2:]
  35         for i := uint16(0); i < fp.Len(); i++ {
  36                 segLen := pathData[2]
  37                 fp.Items = append(fp.Items, NewFilePathItem(pathData[:segLen+3]))
  38                 pathData = pathData[3+segLen:]
  39         }
  40
  41         return nil
  42 }
  43
  44 func (fp *FilePath) Len() uint16 {
  45         return binary.BigEndian.Uint16(fp.ItemCount)
  46 }
  47
  48 func (fp *FilePath) String() string {
  49         var out []string
  50         for _, i := range fp.Items {
  51                 out = append(out, string(i.Name))
  52         }
  53         return strings.Join(out, pathSeparator)
  54 }
  55
  56 func ReadFilePath(filePathFieldData []byte) string {
  57         var fp FilePath
  58         err := fp.UnmarshalBinary(filePathFieldData)
  59         if err != nil {
  60                 // TODO
  61         }
  62         return fp.String()
  63 }