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######################################################################
#
# File: b2/_internal/_cli/obj_loads.py
#
# Copyright 2023 Backblaze Inc. All Rights Reserved.
#
# License https://www.backblaze.com/using_b2_code.html
#
######################################################################
from __future__ import annotations
import argparse
import io
import json
from typing import TypeVar
from b2sdk.v2 import get_b2sdk_doc_urls
try:
import pydantic
from pydantic import TypeAdapter, ValidationError
except ImportError:
pydantic = None
def convert_error_to_human_readable(validation_exc: ValidationError) -> str:
buf = io.StringIO()
for error in validation_exc.errors():
loc = '.'.join(str(loc) for loc in error['loc'])
buf.write(f' In field {loc!r} input was `{error["input"]!r}`, error: {error["msg"]}\n')
return buf.getvalue()
def describe_type(type_) -> str:
urls = get_b2sdk_doc_urls(type_)
if urls:
url_links = ', '.join(f'{name} <{url}>' for name, url in urls.items())
return f'{type_.__name__} ({url_links})'
return type_.__name__
T = TypeVar('T')
def validated_loads(data: str, expected_type: type[T] | None = None) -> T:
if expected_type is not None and pydantic is not None:
ta = TypeAdapter(expected_type)
try:
val = ta.validate_json(data)
except ValidationError as e:
errors = convert_error_to_human_readable(e)
raise argparse.ArgumentTypeError(
f'Invalid value inputted, expected {describe_type(expected_type)}, got {data!r}, more detail below:\n{errors}'
) from e
else:
try:
val = json.loads(data)
except json.JSONDecodeError as e:
raise argparse.ArgumentTypeError(f'{data!r} is not a valid JSON value') from e
return val
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