photoprism/pkg/fs/name.go

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package fs
import (
"fmt"
"os"
"path/filepath"
"strings"
)
// FileName returns the a relative filename with the same base and a given extension in a directory.
func FileName(fileName, dirName, baseDir, fileExt string) string {
fileDir := filepath.Dir(fileName)
if dirName == "" || dirName == "." {
dirName = fileDir
} else if fileDir != dirName {
if filepath.IsAbs(dirName) {
dirName = filepath.Join(dirName, RelName(fileDir, baseDir))
} else {
dirName = filepath.Join(fileDir, dirName)
}
}
if err := os.MkdirAll(dirName, os.ModePerm); err != nil {
fmt.Println(err.Error())
return ""
}
result := filepath.Join(dirName, filepath.Base(fileName)) + fileExt
return result
}
// RelName returns the file name relative to a directory.
func RelName(fileName, dir string) string {
if fileName == dir {
return ""
}
if dir == "" {
return fileName
}
if index := strings.Index(fileName, dir); index == 0 {
if index := strings.LastIndex(dir, string(os.PathSeparator)); index == len(dir)-1 {
pos := len(dir)
return fileName[pos:]
} else if index := strings.LastIndex(dir, string(os.PathSeparator)); index != len(dir) {
pos := len(dir) + 1
return fileName[pos:]
}
}
return fileName
}