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         "os"
   8         "path/filepath"
   9         "regexp"
  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, ignoreList []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 ignoreFile(file.Name(), ignoreList) {
  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 := os.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 !ignoreFile(f.Name(), ignoreList) {
  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                 } else if file.IsDir() {
  89                         dir, err := os.ReadDir(filepath.Join(path, file.Name()))
  90                         if err != nil {
  91                                 return fields, err
  92                         }
  93
  94                         var c uint32
  95                         for _, f := range dir {
  96                                 if !ignoreFile(f.Name(), ignoreList) {
  97                                         c += 1
  98                                 }
  99                         }
 100
 101                         binary.BigEndian.PutUint32(fnwi.FileSize[:], c)
 102                         copy(fnwi.Type[:], []byte("fldr"))
 103                         copy(fnwi.Creator[:], fileCreator)
 104                 } else {
 105                         // the Hotline protocol does not support fileWrapper sizes > 4GiB due to the 4 byte field size, so skip them
 106                         if fileInfo.Size() > 4294967296 {
 107                                 continue
 108                         }
 109
 110                         hlFile, err := newFileWrapper(&OSFileStore{}, path+"/"+file.Name(), 0)
 111                         if err != nil {
 112                                 return nil, err
 113                         }
 114
 115                         copy(fnwi.FileSize[:], hlFile.totalSize())
 116                         copy(fnwi.Type[:], hlFile.ffo.FlatFileInformationFork.TypeSignature)
 117                         copy(fnwi.Creator[:], hlFile.ffo.FlatFileInformationFork.CreatorSignature)
 118                 }
 119
 120                 strippedName := strings.ReplaceAll(file.Name(), ".incomplete", "")
 121
 122                 nameSize := make([]byte, 2)
 123                 binary.BigEndian.PutUint16(nameSize, uint16(len(strippedName)))
 124                 copy(fnwi.NameSize[:], nameSize)
 125
 126                 fnwi.name = []byte(strippedName)
 127
 128                 b, err := fnwi.MarshalBinary()
 129                 if err != nil {
 130                         return nil, err
 131                 }
 132                 fields = append(fields, NewField(FieldFileNameWithInfo, b))
 133         }
 134
 135         return fields, nil
 136 }
 137
 138 func CalcTotalSize(filePath string) ([]byte, error) {
 139         var totalSize uint32
 140         err := filepath.Walk(filePath, func(path string, info os.FileInfo, err error) error {
 141                 if err != nil {
 142                         return err
 143                 }
 144
 145                 if info.IsDir() {
 146                         return nil
 147                 }
 148
 149                 totalSize += uint32(info.Size())
 150
 151                 return nil
 152         })
 153         if err != nil {
 154                 return nil, err
 155         }
 156
 157         bs := make([]byte, 4)
 158         binary.BigEndian.PutUint32(bs, totalSize)
 159
 160         return bs, nil
 161 }
 162
 163 func CalcItemCount(filePath string) ([]byte, error) {
 164         var itemcount uint16
 165         err := filepath.Walk(filePath, func(path string, info os.FileInfo, err error) error {
 166                 if err != nil {
 167                         return err
 168                 }
 169
 170                 if !strings.HasPrefix(info.Name(), ".") {
 171                         itemcount += 1
 172                 }
 173
 174                 return nil
 175         })
 176         if err != nil {
 177                 return nil, err
 178         }
 179
 180         bs := make([]byte, 2)
 181         binary.BigEndian.PutUint16(bs, itemcount-1)
 182
 183         return bs, nil
 184 }
 185
 186 func EncodeFilePath(filePath string) []byte {
 187         pathSections := strings.Split(filePath, "/")
 188         pathItemCount := make([]byte, 2)
 189         binary.BigEndian.PutUint16(pathItemCount, uint16(len(pathSections)))
 190
 191         bytes := pathItemCount
 192
 193         for _, section := range pathSections {
 194                 bytes = append(bytes, []byte{0, 0}...)
 195
 196                 pathStr := []byte(section)
 197                 bytes = append(bytes, byte(len(pathStr)))
 198                 bytes = append(bytes, pathStr...)
 199         }
 200
 201         return bytes
 202 }
 203
 204 func ignoreFile(fileName string, ignoreList []string) bool {
 205         // skip files that match any regular expression present in the IgnoreFiles list
 206         matchIgnoreFilter := 0
 207         for _, pattern := range ignoreList {
 208                 if match, _ := regexp.MatchString(pattern, fileName); match {
 209                         matchIgnoreFilter += 1
 210                 }
 211         }
 212         return matchIgnoreFilter > 0
 213 }