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package hotline
import (
"encoding/binary"
"errors"
"fmt"
"io"
"io/fs"
"os"
"path/filepath"
"regexp"
"strings"
)
func FileTypeFromFilename(filename string) fileType {
fileExt := strings.ToLower(filepath.Ext(filename))
ft, ok := fileTypes[fileExt]
if ok {
return ft
}
return defaultFileType
}
func fileTypeFromInfo(info fs.FileInfo) (ft fileType, err error) {
if info.IsDir() {
ft.CreatorCode = "n/a "
ft.TypeCode = "fldr"
} else {
ft = FileTypeFromFilename(info.Name())
}
return ft, nil
}
const maxFileSize = 4294967296
func GetFileNameList(path string, ignoreList []string) (fields []Field, err error) {
files, err := os.ReadDir(path)
if err != nil {
return fields, fmt.Errorf("error reading path: %s: %w", path, err)
}
for _, file := range files {
var fnwi FileNameWithInfo
if ignoreFile(file.Name(), ignoreList) {
continue
}
fileCreator := make([]byte, 4)
fileInfo, err := file.Info()
if err != nil {
return fields, fmt.Errorf("error getting file info: %s: %w", file.Name(), err)
}
// Check if path is a symlink. If so, follow it.
if fileInfo.Mode()&os.ModeSymlink != 0 {
resolvedPath, err := os.Readlink(filepath.Join(path, file.Name()))
if err != nil {
return fields, fmt.Errorf("error following symlink: %s: %w", resolvedPath, err)
}
rFile, err := os.Stat(resolvedPath)
if errors.Is(err, os.ErrNotExist) {
continue
}
if err != nil {
return fields, err
}
if rFile.IsDir() {
dir, err := os.ReadDir(filepath.Join(path, file.Name()))
if err != nil {
return fields, err
}
var c uint32
for _, f := range dir {
if !ignoreFile(f.Name(), ignoreList) {
c += 1
}
}
binary.BigEndian.PutUint32(fnwi.FileSize[:], c)
copy(fnwi.Type[:], "fldr")
copy(fnwi.Creator[:], fileCreator)
} else {
binary.BigEndian.PutUint32(fnwi.FileSize[:], uint32(rFile.Size()))
copy(fnwi.Type[:], FileTypeFromFilename(rFile.Name()).TypeCode)
copy(fnwi.Creator[:], FileTypeFromFilename(rFile.Name()).CreatorCode)
}
} else if file.IsDir() {
dir, err := os.ReadDir(filepath.Join(path, file.Name()))
if err != nil {
return fields, fmt.Errorf("readDir: %w", err)
}
var c uint32
for _, f := range dir {
if !ignoreFile(f.Name(), ignoreList) {
c += 1
}
}
binary.BigEndian.PutUint32(fnwi.FileSize[:], c)
copy(fnwi.Type[:], "fldr")
copy(fnwi.Creator[:], fileCreator)
} else {
// the Hotline protocol does not support file sizes > 4GiB due to the 4 byte field size, so skip them
if fileInfo.Size() > maxFileSize {
continue
}
hlFile, err := NewFileWrapper(&OSFileStore{}, path+"/"+file.Name(), 0)
if err != nil {
return nil, fmt.Errorf("NewFileWrapper: %w", err)
}
copy(fnwi.FileSize[:], hlFile.TotalSize())
copy(fnwi.Type[:], hlFile.Ffo.FlatFileInformationFork.TypeSignature[:])
copy(fnwi.Creator[:], hlFile.Ffo.FlatFileInformationFork.CreatorSignature[:])
}
strippedName := strings.ReplaceAll(file.Name(), ".incomplete", "")
strippedName, err = txtEncoder.String(strippedName)
if err != nil {
continue
}
nameSize := make([]byte, 2)
binary.BigEndian.PutUint16(nameSize, uint16(len(strippedName)))
copy(fnwi.NameSize[:], nameSize)
fnwi.Name = []byte(strippedName)
b, err := io.ReadAll(&fnwi)
if err != nil {
return nil, fmt.Errorf("error io.ReadAll: %w", err)
}
fields = append(fields, NewField(FieldFileNameWithInfo, b))
}
return fields, nil
}
func CalcTotalSize(filePath string) ([]byte, error) {
var totalSize uint32
err := filepath.Walk(filePath, func(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
if info.IsDir() {
return nil
}
totalSize += uint32(info.Size())
return nil
})
if err != nil {
return nil, err
}
bs := make([]byte, 4)
binary.BigEndian.PutUint32(bs, totalSize)
return bs, nil
}
// CalcItemCount recurses through a file path and counts the number of non-hidden files.
func CalcItemCount(filePath string) ([]byte, error) {
var itemCount uint16
// Walk the directory and count items
err := filepath.Walk(filePath, func(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
// Skip hidden files
if !strings.HasPrefix(info.Name(), ".") {
itemCount++
}
return nil
})
if err != nil {
return nil, err
}
bs := make([]byte, 2)
binary.BigEndian.PutUint16(bs, itemCount-1)
return bs, nil
}
func EncodeFilePath(filePath string) []byte {
pathSections := strings.Split(filePath, "/")
pathItemCount := make([]byte, 2)
binary.BigEndian.PutUint16(pathItemCount, uint16(len(pathSections)))
bytes := pathItemCount
for _, section := range pathSections {
bytes = append(bytes, []byte{0, 0}...)
pathStr := []byte(section)
bytes = append(bytes, byte(len(pathStr)))
bytes = append(bytes, pathStr...)
}
return bytes
}
func ignoreFile(fileName string, ignoreList []string) bool {
// skip files that match any regular expression present in the IgnoreFiles list
matchIgnoreFilter := 0
for _, pattern := range ignoreList {
if match, _ := regexp.MatchString(pattern, fileName); match {
matchIgnoreFilter += 1
}
}
return matchIgnoreFilter > 0
}
|
