etesync-server/etebase_fastapi/utils.py
2020-12-29 13:32:19 +02:00

75 lines
1.9 KiB
Python

import dataclasses
import typing as t
import msgpack
import base64
from fastapi import status, Query, Depends
from pydantic import BaseModel as PyBaseModel
from django.db.models import QuerySet
from django.core.exceptions import ObjectDoesNotExist
from django_etebase import app_settings
from django_etebase.models import AccessLevels
from myauth.models import UserType, get_typed_user_model
from .exceptions import HttpError, HttpErrorOut
User = get_typed_user_model()
Prefetch = t.Literal["auto", "medium"]
PrefetchQuery = Query(default="auto")
class BaseModel(PyBaseModel):
class Config:
json_encoders = {
bytes: lambda x: x,
}
@dataclasses.dataclass
class Context:
user: t.Optional[UserType]
prefetch: t.Optional[Prefetch]
def get_object_or_404(queryset: QuerySet, **kwargs):
try:
return queryset.get(**kwargs)
except ObjectDoesNotExist as e:
raise HttpError("does_not_exist", str(e), status_code=status.HTTP_404_NOT_FOUND)
def is_collection_admin(collection, user):
member = collection.members.filter(user=user).first()
return (member is not None) and (member.accessLevel == AccessLevels.ADMIN)
def msgpack_encode(content):
return msgpack.packb(content, use_bin_type=True)
def msgpack_decode(content):
return msgpack.unpackb(content, raw=False)
def b64encode(value):
return base64.urlsafe_b64encode(value).decode("ascii").strip("=")
def b64decode(data):
data += "=" * ((4 - len(data) % 4) % 4)
return base64.urlsafe_b64decode(data)
PERMISSIONS_READ = [Depends(x) for x in app_settings.API_PERMISSIONS_READ]
PERMISSIONS_READWRITE = PERMISSIONS_READ + [Depends(x) for x in app_settings.API_PERMISSIONS_WRITE]
response_model_dict = {"model": HttpErrorOut}
permission_responses: t.Dict[t.Union[int, str], t.Dict[str, t.Any]] = {
401: response_model_dict,
403: response_model_dict,
}