338 lines
8.3 KiB
Go
338 lines
8.3 KiB
Go
package scanner
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import (
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"container/list"
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"database/sql"
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"fmt"
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"io/ioutil"
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"log"
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"os"
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"path"
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"strconv"
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"strings"
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"github.com/h2non/filetype"
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"github.com/viktorstrate/photoview/api/graphql/models"
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"github.com/viktorstrate/photoview/api/graphql/notification"
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"github.com/viktorstrate/photoview/api/utils"
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)
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type scanner_cache map[string]interface{}
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func (cache *scanner_cache) insert_photo_type(path string, content_type string) {
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(*cache)["photo_type//"+path] = content_type
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}
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func (cache *scanner_cache) get_photo_type(path string) *string {
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result, found := (*cache)["photo_type//"+path].(string)
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if found {
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// log.Printf("Image cache hit: %s\n", path)
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return &result
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}
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return nil
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}
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// Insert single album directory in cache
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func (cache *scanner_cache) insert_album_path(path string, contains_photo bool) {
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(*cache)["album_path//"+path] = contains_photo
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}
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// Insert album path and all parent directories up to the given root directory in cache
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func (cache *scanner_cache) insert_album_paths(end_path string, root string, contains_photo bool) {
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curr_path := path.Clean(end_path)
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root_path := path.Clean(root)
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for curr_path != root_path || curr_path == "." {
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cache.insert_album_path(curr_path, contains_photo)
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curr_path = path.Dir(curr_path)
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}
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}
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func (cache *scanner_cache) album_contains_photo(path string) *bool {
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contains_photo, found := (*cache)["album_path//"+path].(bool)
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if found {
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// log.Printf("Album cache hit: %s\n", path)
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return &contains_photo
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}
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return nil
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}
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func ScanUser(database *sql.DB, userId int) error {
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row := database.QueryRow("SELECT * FROM user WHERE user_id = ?", userId)
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user, err := models.NewUserFromRow(row)
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if err != nil {
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log.Printf("Could not find user to scan: %s\n", err.Error())
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return err
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}
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log.Printf("Starting scan for user '%s'\n", user.Username)
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go scan(database, user)
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return nil
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}
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func scan(database *sql.DB, user *models.User) {
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notifyKey := utils.GenerateToken()
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notification.BroadcastNotification(&models.Notification{
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Key: notifyKey,
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Type: models.NotificationTypeMessage,
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Header: "User scan started",
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Content: "Scanning has started...",
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})
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// Start scanning
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scanner_cache := make(scanner_cache)
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album_paths_scanned := make([]interface{}, 0)
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type scanInfo struct {
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path string
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parentId *int
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}
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scanQueue := list.New()
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scanQueue.PushBack(scanInfo{
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path: user.RootPath,
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parentId: nil,
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})
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for scanQueue.Front() != nil {
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albumInfo := scanQueue.Front().Value.(scanInfo)
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scanQueue.Remove(scanQueue.Front())
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albumPath := albumInfo.path
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albumParentId := albumInfo.parentId
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album_paths_scanned = append(album_paths_scanned, albumPath)
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// Read path
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dirContent, err := ioutil.ReadDir(albumPath)
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if err != nil {
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log.Printf("Could not read directory: %s\n", err.Error())
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return
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}
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tx, err := database.Begin()
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if err != nil {
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log.Printf("ERROR: Could not begin database transaction: %s\n", err)
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return
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}
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log.Printf("Scanning directory: %s", albumPath)
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// Make album if not exists
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albumTitle := path.Base(albumPath)
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_, err = tx.Exec("INSERT IGNORE INTO album (title, parent_album, owner_id, path) VALUES (?, ?, ?, ?)", albumTitle, albumParentId, user.UserID, albumPath)
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if err != nil {
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fmt.Printf("ERROR: Could not insert album into database: %s\n", err)
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tx.Rollback()
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return
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}
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row := tx.QueryRow("SELECT album_id FROM album WHERE path = ?", albumPath)
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var albumId int
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if err := row.Scan(&albumId); err != nil {
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fmt.Printf("ERROR: Could not get id of album: %s\n", err)
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tx.Rollback()
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return
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}
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// Commit album transaction
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if err := tx.Commit(); err != nil {
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log.Printf("ERROR: Could not commit database transaction: %s\n", err)
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return
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}
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// Scan for photos
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for _, item := range dirContent {
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photoPath := path.Join(albumPath, item.Name())
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if !item.IsDir() && isPathImage(photoPath, &scanner_cache) {
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tx, err := database.Begin()
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if err != nil {
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log.Printf("ERROR: Could not begin database transaction for image %s: %s\n", photoPath, err)
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return
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}
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content_type := scanner_cache.get_photo_type(photoPath)
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if content_type == nil {
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log.Println("Content type not found from cache")
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return
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}
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if err := ProcessImage(tx, photoPath, albumId, *content_type); err != nil {
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log.Printf("ERROR: processing image %s: %s", photoPath, err)
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tx.Rollback()
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return
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}
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tx.Commit()
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}
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}
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// Scan for sub-albums
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for _, item := range dirContent {
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subalbumPath := path.Join(albumPath, item.Name())
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if item.IsDir() && directoryContainsPhotos(subalbumPath, &scanner_cache) {
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scanQueue.PushBack(scanInfo{
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path: subalbumPath,
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parentId: &albumId,
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})
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}
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}
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}
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cleanupCache(database, album_paths_scanned, user)
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notification.BroadcastNotification(&models.Notification{
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Key: notifyKey,
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Type: models.NotificationTypeMessage,
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Header: "User scan completed",
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Content: "Scanning has been completed...",
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Positive: true,
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})
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log.Println("Done scanning")
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}
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func directoryContainsPhotos(rootPath string, cache *scanner_cache) bool {
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if contains_image := cache.album_contains_photo(rootPath); contains_image != nil {
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return *contains_image
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}
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scanQueue := list.New()
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scanQueue.PushBack(rootPath)
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scanned_directories := make([]string, 0)
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for scanQueue.Front() != nil {
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dirPath := scanQueue.Front().Value.(string)
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scanQueue.Remove(scanQueue.Front())
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scanned_directories = append(scanned_directories, dirPath)
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dirContent, err := ioutil.ReadDir(dirPath)
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if err != nil {
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log.Printf("Could not read directory: %s\n", err.Error())
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return false
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}
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for _, fileInfo := range dirContent {
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filePath := path.Join(dirPath, fileInfo.Name())
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if fileInfo.IsDir() {
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scanQueue.PushBack(filePath)
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} else {
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if isPathImage(filePath, cache) {
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cache.insert_album_paths(dirPath, rootPath, true)
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return true
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}
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}
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}
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}
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for _, scanned_path := range scanned_directories {
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cache.insert_album_path(scanned_path, false)
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}
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return false
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}
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var SupportedMimetypes = [...]string{
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"image/jpeg",
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"image/png",
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"image/tiff",
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"image/webp",
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"image/x-canon-cr2",
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"image/bmp",
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}
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var WebMimetypes = [...]string{
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"image/jpeg",
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"image/png",
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"image/webp",
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"image/bmp",
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}
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func isPathImage(path string, cache *scanner_cache) bool {
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if cache.get_photo_type(path) != nil {
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return true
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}
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file, err := os.Open(path)
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if err != nil {
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log.Printf("Could not open file %s: %s\n", path, err)
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return false
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}
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defer file.Close()
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head := make([]byte, 261)
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if _, err := file.Read(head); err != nil {
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log.Printf("Could not read file %s: %s\n", path, err)
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return false
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}
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imgType, err := filetype.Image(head)
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if err != nil {
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return false
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}
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for _, supported_mime := range SupportedMimetypes {
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if supported_mime == imgType.MIME.Value {
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cache.insert_photo_type(path, supported_mime)
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return true
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}
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}
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log.Printf("Unsupported image %s of type %s\n", path, imgType.MIME.Value)
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return false
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}
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func cleanupCache(database *sql.DB, scanned_albums []interface{}, user *models.User) {
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if len(scanned_albums) == 0 {
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return
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}
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args := make([]interface{}, 0)
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args = append(args, user.UserID)
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args = append(args, scanned_albums...)
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albums_questions := strings.Repeat("?,", len(scanned_albums))[:len(scanned_albums)*2-1]
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rows, err := database.Query("SELECT album_id FROM album WHERE album.owner_id = ? AND path NOT IN ("+albums_questions+")", args...)
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if err != nil {
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log.Printf("ERROR: Could not get albums from database: %s\n", err)
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return
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}
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deleted_albums := 0
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deleted_ids := make([]interface{}, 0)
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for rows.Next() {
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var album_id int
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rows.Scan(&album_id)
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deleted_ids = append(deleted_ids, album_id)
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cache_path := path.Join("./image-cache", strconv.Itoa(album_id))
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err := os.RemoveAll(cache_path)
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if err != nil {
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log.Printf("ERROR: Could not delete unused cache folder: %s\n%s\n", cache_path, err)
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} else {
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deleted_albums++
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}
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}
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if len(deleted_ids) > 0 {
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albums_questions = strings.Repeat("?,", len(deleted_ids))[:len(deleted_ids)*2-1]
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if _, err := database.Exec("DELETE FROM album WHERE album_id IN ("+albums_questions+")", deleted_ids...); err != nil {
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log.Printf("ERROR: Could not delete old albums from database:\n%s\n", err)
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}
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}
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log.Printf("Deleted %d unused albums from cache", deleted_albums)
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}
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