233 lines
6.3 KiB
Go
233 lines
6.3 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/pkg/errors"
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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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func findAlbumsForUser(db *sql.DB, user *models.User, album_cache *AlbumScannerCache) ([]*models.Album, []error) {
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// Check if user directory exists on the file system
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if _, err := os.Stat(user.RootPath); err != nil {
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if os.IsNotExist(err) {
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return nil, []error{errors.Errorf("Photo directory for user '%s' does not exist '%s'\n", user.Username, user.RootPath)}
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} else {
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return nil, []error{errors.Errorf("Could not read photo directory for user '%s': %s\n", user.Username, user.RootPath)}
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}
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}
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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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userAlbums := make([]*models.Album, 0)
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albumErrors := make([]error, 0)
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// newPhotos := make([]*models.Photo, 0)
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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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// Read path
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dirContent, err := ioutil.ReadDir(albumPath)
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if err != nil {
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albumErrors = append(albumErrors, errors.Wrapf(err, "read directory (%s)", albumPath))
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continue
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}
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tx, err := db.Begin()
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if err != nil {
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albumErrors = append(albumErrors, errors.Wrap(err, "begin database transaction"))
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continue
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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, path_hash) VALUES (?, ?, ?, ?, MD5(path))", albumTitle, albumParentId, user.UserID, albumPath)
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if err != nil {
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albumErrors = append(albumErrors, errors.Wrap(err, "insert album into database"))
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tx.Rollback()
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continue
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}
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row := tx.QueryRow("SELECT * FROM album WHERE path_hash = MD5(?)", albumPath)
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album, err := models.NewAlbumFromRow(row)
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if err != nil {
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albumErrors = append(albumErrors, errors.Wrapf(err, "get album from database (%s)", albumPath))
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tx.Rollback()
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continue
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}
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userAlbums = append(userAlbums, album)
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// Commit album transaction
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if err := tx.Commit(); err != nil {
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albumErrors = append(albumErrors, errors.Wrap(err, "commit database transaction"))
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continue
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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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// Skip if directory is hidden
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if path.Base(subalbumPath)[0:1] == "." {
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continue
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}
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if item.IsDir() && directoryContainsPhotos(subalbumPath, album_cache) {
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scanQueue.PushBack(scanInfo{
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path: subalbumPath,
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parentId: &album.AlbumID,
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})
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}
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}
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}
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deleteErrors := deleteOldUserAlbums(db, userAlbums, user)
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albumErrors = append(albumErrors, deleteErrors...)
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return userAlbums, albumErrors
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}
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func directoryContainsPhotos(rootPath string, cache *AlbumScannerCache) bool {
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if contains_image := cache.AlbumContainsPhotos(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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ScannerError("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 isPathMedia(filePath, cache) {
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cache.InsertAlbumPaths(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.InsertAlbumPath(scanned_path, false)
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}
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return false
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}
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func deleteOldUserAlbums(db *sql.DB, scannedAlbums []*models.Album, user *models.User) []error {
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if len(scannedAlbums) == 0 {
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return nil
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}
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albumPaths := make([]interface{}, len(scannedAlbums))
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for i, album := range scannedAlbums {
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albumPaths[i] = album.Path
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}
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// Delete old albums
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album_args := make([]interface{}, 0)
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album_args = append(album_args, user.UserID)
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album_args = append(album_args, albumPaths...)
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albums_questions := strings.Repeat("MD5(?),", len(albumPaths))[:len(albumPaths)*7-1]
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rows, err := db.Query("SELECT album_id FROM album WHERE album.owner_id = ? AND path_hash NOT IN ("+albums_questions+")", album_args...)
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if err != nil {
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return []error{errors.Wrap(err, "get albums to be deleted from database")}
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}
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defer rows.Close()
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deleteErrors := make([]error, 0)
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deleted_album_ids := make([]interface{}, 0)
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for rows.Next() {
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var album_id int
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if err := rows.Scan(&album_id); err != nil {
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deleteErrors = append(deleteErrors, errors.Wrapf(err, "parse album to be removed (album_id %d)", album_id))
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continue
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}
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deleted_album_ids = append(deleted_album_ids, album_id)
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cache_path := path.Join("./photo_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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deleteErrors = append(deleteErrors, errors.Wrapf(err, "delete unused cache folder (%s)", cache_path))
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}
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}
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if len(deleted_album_ids) > 0 {
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albums_questions = strings.Repeat("?,", len(deleted_album_ids))[:len(deleted_album_ids)*2-1]
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if _, err := db.Exec("DELETE FROM album WHERE album_id IN ("+albums_questions+")", deleted_album_ids...); err != nil {
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ScannerError("Could not delete old albums from database:\n%s\n", err)
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deleteErrors = append(deleteErrors, errors.Wrap(err, "delete old albums from database"))
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}
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}
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return deleteErrors
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}
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func ScannerError(format string, args ...interface{}) {
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message := fmt.Sprintf(format, args...)
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log.Printf("ERROR: %s", message)
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notification.BroadcastNotification(&models.Notification{
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Key: utils.GenerateToken(),
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Type: models.NotificationTypeMessage,
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Header: "Scanner error",
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Content: message,
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Negative: true,
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})
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}
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func PhotoCache() string {
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photoCache := os.Getenv("PHOTO_CACHE")
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if photoCache == "" {
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photoCache = "./photo_cache"
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}
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return photoCache
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}
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