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63 lines
1.8 KiB
63 lines
1.8 KiB
import typing as t
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from django.db.models import QuerySet
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from fastapi import status
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from etebase_server.django.models import Stoken
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from .exceptions import HttpError
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# TODO missing stoken_annotation type
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StokenAnnotation = t.Any
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def get_stoken_obj(stoken: t.Optional[str]) -> t.Optional[Stoken]:
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if stoken:
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try:
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return Stoken.objects.get(uid=stoken)
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except Stoken.DoesNotExist:
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raise HttpError("bad_stoken", "Invalid stoken.", status_code=status.HTTP_400_BAD_REQUEST)
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return None
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def filter_by_stoken(
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stoken: t.Optional[str], queryset: QuerySet, stoken_annotation: StokenAnnotation
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) -> t.Tuple[QuerySet, t.Optional[Stoken]]:
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stoken_rev = get_stoken_obj(stoken)
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queryset = queryset.annotate(max_stoken=stoken_annotation).order_by("max_stoken")
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if stoken_rev is not None:
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queryset = queryset.filter(max_stoken__gt=stoken_rev.id)
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return queryset, stoken_rev
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def get_queryset_stoken(queryset: t.Iterable[t.Any]) -> t.Optional[Stoken]:
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maxid = -1
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for row in queryset:
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rowmaxid = getattr(row, "max_stoken") or -1
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maxid = max(maxid, rowmaxid)
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new_stoken = Stoken.objects.get(id=maxid) if (maxid >= 0) else None
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return new_stoken or None
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def filter_by_stoken_and_limit(
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stoken: t.Optional[str], limit: int, queryset: QuerySet, stoken_annotation: StokenAnnotation
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) -> t.Tuple[list, t.Optional[Stoken], bool]:
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queryset, stoken_rev = filter_by_stoken(stoken=stoken, queryset=queryset, stoken_annotation=stoken_annotation)
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result = list(queryset[: limit + 1])
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if len(result) < limit + 1:
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done = True
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else:
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done = False
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result = result[:-1]
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new_stoken_obj = get_queryset_stoken(result) or stoken_rev
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return result, new_stoken_obj, done
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