fix(files_versions): Update unencrypted_size during rollback

[artonge]

This prevents restored versions of encrypted files from having a wrong reported size. This was blocking download.

[artonge]

/backport to stable30

[artonge]

/backport to stable29

[artonge]

/backport to stable28

[come-nc]

But then is that the correct size? If versions are encrypted then size and unencrypted_size should be different, no?

[artonge]

You're right. getSize() return the unencrypted_size if the file is encrypted:

server/lib/private/Files/FileInfo.php

Lines 176 to 189 in 5ef8b35

	public function getSize($includeMounts = true) {
	if ($includeMounts) {
	$this->updateEntryFromSubMounts();
	if ($this->isEncrypted() && isset($this->data['unencrypted_size']) && $this->data['unencrypted_size'] > 0) {
	return $this->data['unencrypted_size'];
	} else {
	return isset($this->data['size']) ? 0 + $this->data['size'] : 0;
	}
	} else {
	return $this->rawSize;
	}
	}

But not sure how to properly get the size, then. Or maybe we should set size or unencrypted_size depending on the encryption status.

[artonge]

Hmm, no, if we do that size will not be updated. But not even use size if the file is encrypted

[artonge]

/backport to stable31