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package hotline
import (
"bytes"
"encoding/binary"
"errors"
"path"
)
const pathSeparator = "/" // File path separator TODO: make configurable to support Windows
// FilePathItem represents the file or directory portion of a delimited file path (e.g. foo and bar in "/foo/bar")
// 00 00
// 09
// 73 75 62 66 6f 6c 64 65 72 // "subfolder"
type FilePathItem struct {
Len byte
Name []byte
}
func NewFilePathItem(b []byte) FilePathItem {
return FilePathItem{
Len: b[2],
Name: b[3:],
}
}
type FilePath struct {
ItemCount [2]byte
Items []FilePathItem
}
const minFilePathLen = 2
func (fp *FilePath) UnmarshalBinary(b []byte) error {
if len(b) < minFilePathLen {
return errors.New("insufficient bytes")
}
err := binary.Read(bytes.NewReader(b[0:2]), binary.BigEndian, &fp.ItemCount)
if err != nil {
return err
}
pathData := b[2:]
for i := uint16(0); i < fp.Len(); i++ {
segLen := pathData[2]
fp.Items = append(fp.Items, NewFilePathItem(pathData[:segLen+3]))
pathData = pathData[3+segLen:]
}
return nil
}
func (fp *FilePath) Len() uint16 {
return binary.BigEndian.Uint16(fp.ItemCount[:])
}
func (fp *FilePath) String() string {
out := []string{"/"}
for _, i := range fp.Items {
out = append(out, string(i.Name))
}
return path.Join(out...)
}
func ReadFilePath(filePathFieldData []byte) string {
var fp FilePath
err := fp.UnmarshalBinary(filePathFieldData)
if err != nil {
// TODO
}
return fp.String()
}
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