Integrate formal decisions with cases
This commit is contained in:
@@ -0,0 +1,283 @@
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from __future__ import annotations
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from collections.abc import Mapping, Sequence
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from urllib.parse import quote
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from sqlalchemy import func, select
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from sqlalchemy.orm import Session
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from govoplan_core.auth import ApiPrincipal
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from govoplan_core.core.events import PlatformEvent
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from govoplan_core.core.modules import ModuleContext
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from govoplan_core.core.search import (
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SearchAuthorizationRequest,
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SearchBackfillPage,
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SearchBackfillRequest,
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SearchDocument,
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SearchIndexChange,
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SearchResourceReference,
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SearchResourceType,
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)
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from govoplan_cases.backend.db.models import (
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CaseAccessGrant,
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CaseIdentity,
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CaseRecordRevision,
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)
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from govoplan_cases.backend.service import can_access_case
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PROVIDER_ID = "cases.cases"
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RESOURCE_TYPE = "case"
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READ_SCOPE = "cases:case:read"
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ADMIN_SCOPE = "cases:case:admin"
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class CasesSearchSource:
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def resource_types(self) -> Sequence[SearchResourceType]:
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return (
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SearchResourceType(
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provider_id=PROVIDER_ID,
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module_id="cases",
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resource_type=RESOURCE_TYPE,
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label="Cases",
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requires_authorization_recheck=True,
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),
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)
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def backfill(
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self,
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session: object,
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*,
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request: SearchBackfillRequest,
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) -> SearchBackfillPage:
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_assert_source(request.provider_id, request.resource_type)
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db = _session(session)
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statement = (
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select(CaseRecordRevision, CaseIdentity)
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.join(CaseIdentity, CaseIdentity.id == CaseRecordRevision.identity_id)
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.where(
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CaseRecordRevision.tenant_id == request.tenant_id,
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CaseRecordRevision.superseded_at.is_(None),
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)
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)
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if request.cursor:
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statement = statement.where(CaseRecordRevision.case_id > request.cursor)
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rows = list(
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db.execute(
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statement.order_by(CaseRecordRevision.case_id).limit(request.limit + 1)
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).all()
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)
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has_more = len(rows) > request.limit
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selected = rows[: request.limit]
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grants = _grants_by_case(
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db,
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request.tenant_id,
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[row.case_id for row, _identity in selected],
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)
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high_watermark = db.scalar(
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select(func.max(CaseRecordRevision.recorded_at)).where(
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CaseRecordRevision.tenant_id == request.tenant_id,
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CaseRecordRevision.superseded_at.is_(None),
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)
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)
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return SearchBackfillPage(
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documents=tuple(
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_document(
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row,
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identity=identity,
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grants=grants.get(row.case_id, ()),
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)
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for row, identity in selected
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),
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next_cursor=selected[-1][0].case_id if has_more and selected else None,
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complete=not has_more,
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high_watermark=high_watermark.isoformat() if high_watermark else None,
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)
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def authorize(
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self,
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session: object,
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principal: object,
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*,
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requests: Sequence[SearchAuthorizationRequest],
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) -> Mapping[str, bool]:
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decisions = {item.reference.key: False for item in requests}
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if not isinstance(principal, ApiPrincipal) or not principal.has(READ_SCOPE):
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return decisions
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db = _session(session)
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for request in requests:
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reference = request.reference
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if (
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reference.tenant_id != principal.tenant_id
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or reference.module_id != "cases"
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or reference.resource_type != RESOURCE_TYPE
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):
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continue
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decisions[reference.key] = can_access_case(
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db,
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principal,
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case_id=reference.resource_id,
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permission="read",
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)
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return decisions
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def index_changes_for_event(
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self,
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session: object,
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*,
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event: PlatformEvent,
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delivery_key: str,
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) -> Sequence[SearchIndexChange]:
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if (
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event.module_id != "cases"
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or event.tenant is None
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or event.resource is None
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or event.resource.type != RESOURCE_TYPE
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or event.resource.id is None
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):
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return ()
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db = _session(session)
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row = db.scalar(
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select(CaseRecordRevision).where(
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CaseRecordRevision.tenant_id == event.tenant.id,
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CaseRecordRevision.case_id == event.resource.id,
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CaseRecordRevision.superseded_at.is_(None),
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)
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)
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identity = db.scalar(
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select(CaseIdentity).where(
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CaseIdentity.tenant_id == event.tenant.id,
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CaseIdentity.case_id == event.resource.id,
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)
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)
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deleted = row is None or identity is None
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cursor = event.event_id
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document = None
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if not deleted:
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document = _document(
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row,
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identity=identity,
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grants=_grants_by_case(
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db,
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event.tenant.id,
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[row.case_id],
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).get(row.case_id, ()),
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change_cursor=cursor,
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)
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reference = SearchResourceReference(
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tenant_id=event.tenant.id,
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module_id="cases",
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resource_type=RESOURCE_TYPE,
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resource_id=event.resource.id,
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)
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return (
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SearchIndexChange(
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change_id=f"{delivery_key}:{PROVIDER_ID}",
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provider_id=PROVIDER_ID,
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kind="delete" if deleted else "upsert",
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reference=reference,
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source_revision=(document.source_revision if document else cursor),
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cursor=cursor,
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document=document,
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occurred_at=event.occurred_at,
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),
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)
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def create_cases_search_source(_context: ModuleContext) -> CasesSearchSource:
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return CasesSearchSource()
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def _document(
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row: CaseRecordRevision,
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*,
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identity: CaseIdentity,
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grants: Sequence[CaseAccessGrant],
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change_cursor: str | None = None,
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) -> SearchDocument:
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tokens = [f"scope:{READ_SCOPE}", f"scope:{ADMIN_SCOPE}"]
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if identity.created_by:
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tokens.extend(
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(f"account:{identity.created_by}", f"membership:{identity.created_by}")
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)
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prefixes = {
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"account": "account",
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"identity": "identity",
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"group": "group",
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"role": "role",
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"function": "function",
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"function_assignment": "function",
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}
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for grant in grants:
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prefix = prefixes.get(grant.subject_kind)
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if prefix:
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tokens.append(f"{prefix}:{grant.subject_id}")
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return SearchDocument(
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tenant_id=row.tenant_id,
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module_id="cases",
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provider_id=PROVIDER_ID,
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resource_type=RESOURCE_TYPE,
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resource_id=row.case_id,
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title=row.title,
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url=f"/cases/{quote(row.case_id, safe='')}",
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summary=f"{identity.case_number} - {row.status_key}",
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body=row.search_text[:200_000],
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keywords=(
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identity.case_number[:200],
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row.case_type_key[:200],
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row.status_key[:200],
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),
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visibility="restricted",
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acl_tokens=tuple(dict.fromkeys(tokens)),
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metadata={
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"case_number": identity.case_number,
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"case_type_key": row.case_type_key,
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"status_key": row.status_key,
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"access_mode": row.access_mode,
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},
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source_revision=str(row.revision),
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change_cursor=change_cursor,
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source_updated_at=row.recorded_at,
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requires_authorization_recheck=True,
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)
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def _grants_by_case(
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session: Session,
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tenant_id: str,
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case_ids: Sequence[str],
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) -> dict[str, tuple[CaseAccessGrant, ...]]:
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grouped: dict[str, list[CaseAccessGrant]] = {
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case_id: [] for case_id in case_ids
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}
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if not case_ids:
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return {}
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rows = session.scalars(
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select(CaseAccessGrant).where(
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CaseAccessGrant.tenant_id == tenant_id,
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CaseAccessGrant.case_id.in_(tuple(case_ids)),
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CaseAccessGrant.active.is_(True),
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)
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)
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for row in rows:
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grouped.setdefault(row.case_id, []).append(row)
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return {key: tuple(value) for key, value in grouped.items()}
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def _assert_source(provider_id: str, resource_type: str) -> None:
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if provider_id != PROVIDER_ID or resource_type != RESOURCE_TYPE:
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raise ValueError("Unsupported Cases search source.")
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def _session(value: object) -> Session:
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if not isinstance(value, Session):
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raise TypeError("Cases search requires a SQLAlchemy session.")
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return value
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__all__ = [
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"CasesSearchSource",
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"PROVIDER_ID",
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"RESOURCE_TYPE",
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"create_cases_search_source",
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]
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