def get_shared(doctype, user=None, rights=None):
	"""Get list of shared document names for given user and DocType.

	:param doctype: DocType of which shared names are queried.
	:param user: User for which shared names are queried.
	:param rights: List of rights for which the document is shared. List of `read`, `write`, `share`"""

	if not user:
		user = frappe.session.user

	if not rights:
		rights = ["read"]

	filters = [[right, '=', 1] for right in rights]
	filters += [['share_doctype', '=', doctype]]
	or_filters = [['user', '=', user]]
	if user != 'Guest':
		or_filters += [['everyone', '=', 1]]

	shared_docs = frappe.db.get_all('DocShare',
		fields=['share_name'],
		filters=filters,
		or_filters=or_filters)

	return [doc.share_name for doc in shared_docs]