Implement move capability for directory sharing #1064
Description
Currently, successfully fulfilling a TDP SharedDirectoryMoveRequest is unimplemented (the user will see an error modal) because (source)
The FileSystemHandle.move() method has shipped for files within the origin private file system (OPFS), is behind a flag for files if the source or destination is outside of the OPFS, and is not yet supported for directories.
One option for resolving this is to implement a move "manually" by (source):
creating a new file/directory, copying over data (recursively, in the case of a directory), and removing the original
however
This process is slow, error prone (e.g. disk full), and can require re-uploading files in some cases.
Ideally we will be able to use an inbuilt FileSystemHandle.move() method. The tracking issue appears to be whatwg/fs#10, and the closest thing I've found to a launch date is "relatively soon": WICG/file-system-access#50 (comment) (June 6, 2022)
See 53510cc for an implementation that should be close to working when the feature is added to browsers.