128 lines
3.3 KiB
Go
128 lines
3.3 KiB
Go
/*
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* Copyright (C) 2020 Philipp Haefelfinger (http://www.haefelfinger.ch/). All Rights Reserved.
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* This application is licensed under GPLv2. See the LICENSE file in the root directory of the project.
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*/
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package localFileStructure
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import (
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"fmt"
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"github.com/sirupsen/logrus"
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"os"
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"path/filepath"
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"strings"
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"time"
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)
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type FilesystemNode struct {
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Key string
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Path string
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Name string
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IsDir bool
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ModTime time.Time
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}
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func (n *FilesystemNode) String() string {
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return fmt.Sprintf("FilesystemNode: %s", n.Path)
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}
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func ScanLocalFileStructure(path string, extensions []string, ignoreDirs []string, dirSuffixToSkip int) (map[string]*FilesystemNode, error) {
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fullPathRoot, err := filepath.Abs(path)
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if err != nil {
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return nil, err
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}
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ignoreDirsMap := make(map[string]struct{}, len(ignoreDirs))
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for _, ignoredFolder := range ignoreDirs {
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ignoreDirsMap[strings.ToLower(ignoredFolder)] = struct{}{}
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}
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extensionsMap := make(map[string]struct{}, len(extensions))
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for _, extension := range extensions {
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extensionsMap["."+strings.ToLower(extension)] = struct{}{}
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}
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if len(extensionsMap) == 0 {
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logrus.Debug("No extensions specified, adding jpg and png")
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extensionsMap[".jpg"] = struct{}{}
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extensionsMap[".png"] = struct{}{}
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}
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logrus.Infof("Scanning %s for images...", fullPathRoot)
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fileMap := make(map[string]*FilesystemNode)
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fullPathReplace := fmt.Sprintf("%s%c", fullPathRoot, os.PathSeparator)
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numberOfDirectories := 0
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numberOfImages := 0
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err = filepath.Walk(fullPathRoot, func(path string, info os.FileInfo, err error) error {
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if fullPathRoot == path {
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return nil
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}
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if strings.HasPrefix(info.Name(), ".") {
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logrus.Tracef("Skipping hidden file or directory %s", path)
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return nil
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}
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_, dirIgnored := ignoreDirsMap[strings.ToLower(info.Name())]
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if dirIgnored && info.IsDir() {
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logrus.Tracef("Skipping ignored directory %s", path)
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return filepath.SkipDir
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}
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extension := strings.ToLower(filepath.Ext(path))
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_, extensionSupported := extensionsMap[extension]
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if !extensionSupported && !info.IsDir() {
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return nil
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}
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key := buildKey(path, info, fullPathReplace, dirSuffixToSkip)
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fileMap[path] = &FilesystemNode{
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Key: key,
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Path: path,
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Name: filepath.Base(key),
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IsDir: info.IsDir(),
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ModTime: info.ModTime(),
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}
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if info.IsDir() {
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numberOfDirectories += 1
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} else {
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numberOfImages += 1
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}
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return nil
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})
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if err != nil {
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return nil, err
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}
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logrus.Infof("Found %d directories and %d images on the local filesystem", numberOfDirectories, numberOfImages)
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return fileMap, nil
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}
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func buildKey(path string, info os.FileInfo, fullPathReplace string, dirSuffixToSkip int) string {
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if info.IsDir() {
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return trimPathForKey(path, fullPathReplace, dirSuffixToSkip)
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}
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fileName := filepath.Base(path)
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directoryName := filepath.Dir(path)
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cleanDir := trimPathForKey(directoryName, fullPathReplace, dirSuffixToSkip)
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return filepath.Join(cleanDir, fileName)
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}
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func trimPathForKey(path string, fullPathReplace string, dirSuffixToSkip int) string {
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trimmedPath := strings.Replace(path, fullPathReplace, "", 1)
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for i := 0; i < dirSuffixToSkip; i++ {
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trimmedPath = filepath.Clean(strings.TrimSuffix(trimmedPath, filepath.Base(trimmedPath)))
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}
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if trimmedPath == "." {
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return "root"
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}
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return trimmedPath
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}
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