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from typing import Any, Callable, Dict, Iterable, Type, TypeVar
from starlette.datastructures import URL as URL # noqa: F401
from starlette.datastructures import Address as Address # noqa: F401
from starlette.datastructures import FormData as FormData # noqa: F401
from starlette.datastructures import Headers as Headers # noqa: F401
from starlette.datastructures import QueryParams as QueryParams # noqa: F401
from starlette.datastructures import State as State # noqa: F401
from starlette.datastructures import UploadFile as StarletteUploadFile
class UploadFile(StarletteUploadFile):
@classmethod
def __get_validators__(cls: Type["UploadFile"]) -> Iterable[Callable[..., Any]]:
yield cls.validate
@classmethod
def validate(cls: Type["UploadFile"], v: Any) -> Any:
if not isinstance(v, StarletteUploadFile):
raise ValueError(f"Expected UploadFile, received: {type(v)}")
return v
@classmethod
def __modify_schema__(cls, field_schema: Dict[str, Any]) -> None:
field_schema.update({"type": "string", "format": "binary"})
class DefaultPlaceholder:
"""
You shouldn't use this class directly.
It's used internally to recognize when a default value has been overwritten, even
if the overridden default value was truthy.
"""
def __init__(self, value: Any):
self.value = value
def __bool__(self) -> bool:
return bool(self.value)
def __eq__(self, o: object) -> bool:
return isinstance(o, DefaultPlaceholder) and o.value == self.value
DefaultType = TypeVar("DefaultType")
def Default(value: DefaultType) -> DefaultType:
"""
You shouldn't use this function directly.
It's used internally to recognize when a default value has been overwritten, even
if the overridden default value was truthy.
"""
return DefaultPlaceholder(value) # type: ignore
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