media-library-single-clone

name

media-library-single-clone

description

OpenHarmony single-framework media library clone restore domain expertise. Use when working with multimedia_media_library clone/restore/backup extension code, especially services/media_backup_extension/src/clone_restore.cpp, base_restore.cpp, photos_clone.cpp, photos_dao.cpp, and related headers. Covers clone restore workflows, duplicate asset merging, cloud photo cloning, position management (LOCAL/CLOUD/LOCAL_AND_CLOUD), thumbnail handling, and SQL query patterns for Photos/PhotoAlbum/PhotoMap tables.

媒体库单单克隆 (Media Library Single Clone)

Core Files

Component	Path
Clone restore main	services/media_backup_extension/src/clone_restore.cpp
Clone restore header	services/media_backup_extension/include/clone_restore.h
Base restore	services/media_backup_extension/src/base_restore.cpp
Photos DAO	services/media_backup_extension/src/restore/photos_dao.cpp
Photos clone	services/media_backup_extension/src/restore/photos_clone.cpp
Backup const	services/media_backup_extension/include/backup_const.h

Key Workflows

1. Normal Photo Clone Flow

RestorePhoto()
  ├── QueryFileInfos(offset)          // position IN (1,3), local photos
  ├── InsertPhoto(fileInfos)
  │     ├── GetInsertValues()         // PrepareCloudPath + GetInsertValue
  │     ├── BatchInsertWithRetry()    // INSERT into Photos
  │     ├── InsertPhotoRelated()      // BatchQueryPhoto + BatchInsertMap
  │     └── MoveMigrateFile()         // MoveAsset (MovePicture/Thumbnail/EditData)
  └── ProcessFailedOffsets()