photoprism/pkg/fs/cache.go

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652 B
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package fs
import (
"fmt"
"os"
"path"
)
// CachePath returns a cache directory name based on the base path, file hash and cache namespace.
func CachePath(basePath, fileHash, namespace string, create bool) (cachePath string, err error) {
if len(fileHash) < 4 {
return "", fmt.Errorf("cache: hash '%s' is too short", fileHash)
}
if namespace == "" {
return "", fmt.Errorf("cache: namespace for hash '%s' is empty", fileHash)
}
cachePath = path.Join(basePath, namespace, fileHash[0:1], fileHash[1:2], fileHash[2:3])
if create {
if err := os.MkdirAll(cachePath, ModeDir); err != nil {
return "", err
}
}
return cachePath, nil
}