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

   1 package hotline
   2
   3 import (
   4         "encoding/binary"
   5         "errors"
   6         "io/fs"
   7         "io/ioutil"
   8         "os"
   9         "path/filepath"
  10         "strings"
  11 )
  12
  13 func fileTypeFromFilename(filename string) fileType {
  14         fileExt := strings.ToLower(filepath.Ext(filename))
  15         ft, ok := fileTypes[fileExt]
  16         if ok {
  17                 return ft
  18         }
  19         return defaultFileType
  20 }
  21
  22 func fileTypeFromInfo(info fs.FileInfo) (ft fileType, err error) {
  23         if info.IsDir() {
  24                 ft.CreatorCode = "n/a "
  25                 ft.TypeCode = "fldr"
  26         } else {
  27                 ft = fileTypeFromFilename(info.Name())
  28         }
  29
  30         return ft, nil
  31 }
  32
  33 func getFileNameList(path string) (fields []Field, err error) {
  34         files, err := os.ReadDir(path)
  35         if err != nil {
  36                 return fields, nil
  37         }
  38
  39         for _, file := range files {
  40                 var fnwi FileNameWithInfo
  41
  42                 if strings.HasPrefix(file.Name(), ".") {
  43                         continue
  44                 }
  45
  46                 fileCreator := make([]byte, 4)
  47
  48                 fileInfo, err := file.Info()
  49                 if err != nil {
  50                         return fields, err
  51                 }
  52
  53                 if fileInfo.Mode()&os.ModeSymlink != 0 {
  54                         resolvedPath, err := os.Readlink(filepath.Join(path, file.Name()))
  55                         if err != nil {
  56                                 return fields, err
  57                         }
  58
  59                         rFile, err := os.Stat(filepath.Join(path, resolvedPath))
  60                         if errors.Is(err, os.ErrNotExist) {
  61                                 continue
  62                         }
  63                         if err != nil {
  64                                 return fields, err
  65                         }
  66
  67                         if rFile.IsDir() {
  68                                 dir, err := ioutil.ReadDir(filepath.Join(path, file.Name()))
  69                                 if err != nil {
  70                                         return fields, err
  71                                 }
  72
  73                                 var c uint32
  74                                 for _, f := range dir {
  75                                         if !strings.HasPrefix(f.Name(), ".") {
  76                                                 c += 1
  77                                         }
  78                                 }
  79
  80                                 binary.BigEndian.PutUint32(fnwi.FileSize[:], c)
  81                                 copy(fnwi.Type[:], []byte("fldr")[:])
  82                                 copy(fnwi.Creator[:], fileCreator[:])
  83                         } else {
  84                                 binary.BigEndian.PutUint32(fnwi.FileSize[:], uint32(rFile.Size()))
  85                                 copy(fnwi.Type[:], []byte(fileTypeFromFilename(rFile.Name()).TypeCode)[:])
  86                                 copy(fnwi.Creator[:], []byte(fileTypeFromFilename(rFile.Name()).CreatorCode)[:])
  87                         }
  88
  89                 } else if file.IsDir() {
  90                         dir, err := ioutil.ReadDir(filepath.Join(path, file.Name()))
  91                         if err != nil {
  92                                 return fields, err
  93                         }
  94
  95                         var c uint32
  96                         for _, f := range dir {
  97                                 if !strings.HasPrefix(f.Name(), ".") {
  98                                         c += 1
  99                                 }
 100                         }
 101
 102                         binary.BigEndian.PutUint32(fnwi.FileSize[:], c)
 103                         copy(fnwi.Type[:], []byte("fldr")[:])
 104                         copy(fnwi.Creator[:], fileCreator[:])
 105                 } else {
 106                         // the Hotline protocol does not support fileWrapper sizes > 4GiB due to the 4 byte field size, so skip them
 107                         if fileInfo.Size() > 4294967296 {
 108                                 continue
 109                         }
 110
 111                         hlFile, err := newFileWrapper(&OSFileStore{}, path+"/"+file.Name(), 0)
 112                         if err != nil {
 113                                 return nil, err
 114                         }
 115
 116                         copy(fnwi.FileSize[:], hlFile.totalSize()[:])
 117                         copy(fnwi.Type[:], hlFile.ffo.FlatFileInformationFork.TypeSignature[:])
 118                         copy(fnwi.Creator[:], hlFile.ffo.FlatFileInformationFork.CreatorSignature[:])
 119                 }
 120
 121                 strippedName := strings.Replace(file.Name(), ".incomplete", "", -1)
 122
 123                 nameSize := make([]byte, 2)
 124                 binary.BigEndian.PutUint16(nameSize, uint16(len(strippedName)))
 125                 copy(fnwi.NameSize[:], nameSize[:])
 126
 127                 fnwi.name = []byte(strippedName)
 128
 129                 b, err := fnwi.MarshalBinary()
 130                 if err != nil {
 131                         return nil, err
 132                 }
 133                 fields = append(fields, NewField(fieldFileNameWithInfo, b))
 134         }
 135
 136         return fields, nil
 137 }
 138
 139 func CalcTotalSize(filePath string) ([]byte, error) {
 140         var totalSize uint32
 141         err := filepath.Walk(filePath, func(path string, info os.FileInfo, err error) error {
 142                 if err != nil {
 143                         return err
 144                 }
 145
 146                 if info.IsDir() {
 147                         return nil
 148                 }
 149
 150                 totalSize += uint32(info.Size())
 151
 152                 return nil
 153         })
 154         if err != nil {
 155                 return nil, err
 156         }
 157
 158         bs := make([]byte, 4)
 159         binary.BigEndian.PutUint32(bs, totalSize)
 160
 161         return bs, nil
 162 }
 163
 164 func CalcItemCount(filePath string) ([]byte, error) {
 165         var itemcount uint16
 166         err := filepath.Walk(filePath, func(path string, info os.FileInfo, err error) error {
 167                 if err != nil {
 168                         return err
 169                 }
 170
 171                 if !strings.HasPrefix(info.Name(), ".") {
 172                         itemcount += 1
 173                 }
 174
 175                 return nil
 176         })
 177         if err != nil {
 178                 return nil, err
 179         }
 180
 181         bs := make([]byte, 2)
 182         binary.BigEndian.PutUint16(bs, itemcount-1)
 183
 184         return bs, nil
 185 }
 186
 187 func EncodeFilePath(filePath string) []byte {
 188         pathSections := strings.Split(filePath, "/")
 189         pathItemCount := make([]byte, 2)
 190         binary.BigEndian.PutUint16(pathItemCount, uint16(len(pathSections)))
 191
 192         bytes := pathItemCount
 193
 194         for _, section := range pathSections {
 195                 bytes = append(bytes, []byte{0, 0}...)
 196
 197                 pathStr := []byte(section)
 198                 bytes = append(bytes, byte(len(pathStr)))
 199                 bytes = append(bytes, pathStr...)
 200         }
 201
 202         return bytes
 203 }