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######################################################################
#
# File: b2sdk/v1/file_metadata.py
#
# Copyright 2021 Backblaze Inc. All Rights Reserved.
#
# License https://www.backblaze.com/using_b2_code.html
#
######################################################################
from __future__ import annotations
import b2sdk.v2 as v2
class FileMetadata:
"""
Hold information about a file which is being downloaded.
"""
UNVERIFIED_CHECKSUM_PREFIX = 'unverified:'
def __init__(
self,
file_id,
file_name,
content_type,
content_length,
content_sha1,
file_info,
):
self.file_id = file_id
self.file_name = file_name
self.content_type = content_type
self.content_length = content_length
self.content_sha1, self.content_sha1_verified = self._decode_content_sha1(content_sha1)
self.file_info = file_info
def as_info_dict(self):
return {
'fileId': self.file_id,
'fileName': self.file_name,
'contentType': self.content_type,
'contentLength': self.content_length,
'contentSha1': self._encode_content_sha1(self.content_sha1, self.content_sha1_verified),
'fileInfo': self.file_info,
}
@classmethod
def _decode_content_sha1(cls, content_sha1):
if content_sha1.startswith(cls.UNVERIFIED_CHECKSUM_PREFIX):
return content_sha1[len(cls.UNVERIFIED_CHECKSUM_PREFIX) :], False
return content_sha1, True
@classmethod
def _encode_content_sha1(cls, content_sha1, content_sha1_verified):
if not content_sha1_verified:
return f'{cls.UNVERIFIED_CHECKSUM_PREFIX}{content_sha1}'
return content_sha1
@classmethod
def from_download_version(cls, download_version: v2.DownloadVersion):
return cls(
file_id=download_version.id_,
file_name=download_version.file_name,
content_type=download_version.content_type,
content_length=download_version.content_length,
content_sha1=download_version.content_sha1,
file_info=download_version.file_info,
)
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