refactor: stage effective view resolution
This commit is contained in:
@@ -8,8 +8,8 @@ from dataclasses import dataclass
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from datetime import datetime, timezone
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from typing import Literal
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from sqlalchemy import or_
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from sqlalchemy.orm import Session
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from sqlalchemy import and_, or_
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from sqlalchemy.orm import Session, joinedload
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from govoplan_core.core.views import (
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VIEW_SURFACE_CONTRACT_VERSION,
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@@ -28,6 +28,8 @@ from govoplan_views.backend.db.models import (
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ASSIGNMENT_MODES = frozenset({"available", "default", "required"})
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ASSIGNMENT_SCOPES = frozenset({"system", "tenant", "group", "user"})
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DEFINITION_SCOPES = frozenset({"system", "tenant", "group", "user"})
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MAX_EFFECTIVE_VIEW_ASSIGNMENTS = 1000
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MAX_EFFECTIVE_VIEW_GROUPS = 500
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LOCKOUT_BASE_SURFACE_IDS = (
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"access.module",
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"access.nav.admin",
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@@ -81,6 +83,18 @@ class EffectiveViewState:
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effective: EffectiveView
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available_views: tuple[EffectiveViewOption, ...]
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diagnostics: tuple[ViewDiagnostic, ...] = ()
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invalidation_token: str | None = None
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ResolvedAssignment = tuple[ViewAssignment, ViewRevision]
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@dataclass(frozen=True, slots=True)
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class ViewSelection:
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selected: ResolvedAssignment | None
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locked: bool
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provenance: tuple[dict[str, object], ...]
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diagnostics: tuple[ViewDiagnostic, ...] = ()
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def _now() -> datetime:
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@@ -660,19 +674,6 @@ def list_assignments(
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).all()
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def _assignment_revision(
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session: Session,
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assignment: ViewAssignment,
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) -> ViewRevision | None:
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revision_id = assignment.revision_id or assignment.definition.published_revision_id
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if not revision_id:
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return None
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revision = session.get(ViewRevision, revision_id)
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if revision is None or revision.definition_id != assignment.definition_id:
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return None
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return revision
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def _validate_assignment_revision(
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session: Session,
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definition: ViewDefinition,
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@@ -874,26 +875,6 @@ def delete_assignment(session: Session, assignment: ViewAssignment) -> None:
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session.flush()
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def _assignment_applies(
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assignment: ViewAssignment,
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*,
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tenant_id: str,
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account_id: str,
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group_ids: frozenset[str],
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) -> bool:
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if assignment.scope_type == "system":
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return True
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if assignment.tenant_id != tenant_id:
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return False
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if assignment.scope_type == "tenant":
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return assignment.scope_id == tenant_id
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if assignment.scope_type == "group":
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return bool(assignment.scope_id and assignment.scope_id in group_ids)
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if assignment.scope_type == "user":
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return assignment.scope_id == account_id
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return False
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def _assignment_order(assignment: ViewAssignment) -> tuple[int, int, float, str]:
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specificity = {
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"system": 0,
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@@ -923,57 +904,113 @@ def _preference(
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)
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def resolve_effective_view(
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def _collect_effective_view_candidates(
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session: Session,
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*,
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tenant_id: str,
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account_id: str,
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group_ids: Iterable[str] = (),
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catalogue: Iterable[ViewSurface] | None = None,
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) -> EffectiveViewState:
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groups = frozenset(str(group_id) for group_id in group_ids)
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candidates = (
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group_ids: frozenset[str],
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) -> tuple[tuple[ViewAssignment, ...], bool]:
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scope_filters = [
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and_(
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ViewAssignment.scope_type == "system",
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ViewAssignment.tenant_id.is_(None),
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),
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and_(
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ViewAssignment.scope_type == "tenant",
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ViewAssignment.tenant_id == tenant_id,
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ViewAssignment.scope_id == tenant_id,
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),
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and_(
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ViewAssignment.scope_type == "user",
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ViewAssignment.tenant_id == tenant_id,
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ViewAssignment.scope_id == account_id,
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),
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]
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if group_ids:
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scope_filters.append(
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and_(
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ViewAssignment.scope_type == "group",
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ViewAssignment.tenant_id == tenant_id,
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ViewAssignment.scope_id.in_(group_ids),
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)
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)
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rows = (
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session.query(ViewAssignment)
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.join(ViewDefinition, ViewAssignment.definition_id == ViewDefinition.id)
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.options(joinedload(ViewAssignment.definition))
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.filter(
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ViewAssignment.is_active.is_(True),
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ViewDefinition.status == "published",
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ViewDefinition.deleted_at.is_(None),
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or_(
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ViewAssignment.tenant_id == tenant_id,
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ViewAssignment.tenant_id.is_(None),
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),
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or_(*scope_filters),
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)
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.order_by(ViewAssignment.id.asc())
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.limit(MAX_EFFECTIVE_VIEW_ASSIGNMENTS + 1)
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.all()
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)
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applicable = [
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assignment
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return (
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tuple(rows[:MAX_EFFECTIVE_VIEW_ASSIGNMENTS]),
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len(rows) > MAX_EFFECTIVE_VIEW_ASSIGNMENTS,
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)
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def _resolve_assignment_revisions(
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session: Session,
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assignments: Iterable[ViewAssignment],
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) -> tuple[ResolvedAssignment, ...]:
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candidates = tuple(assignments)
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revision_ids = {
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revision_id
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for assignment in candidates
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if _assignment_applies(
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assignment,
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tenant_id=tenant_id,
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account_id=account_id,
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group_ids=groups,
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if (
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revision_id := (
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assignment.revision_id
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or assignment.definition.published_revision_id
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)
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)
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]
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}
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revisions = (
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session.query(ViewRevision)
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.filter(ViewRevision.id.in_(revision_ids))
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.all()
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if revision_ids
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else ()
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)
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by_id = {revision.id: revision for revision in revisions}
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resolved: list[ResolvedAssignment] = []
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for assignment in candidates:
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revision_id = (
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assignment.revision_id
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or assignment.definition.published_revision_id
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)
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revision = by_id.get(revision_id)
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if (
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revision is not None
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and revision.definition_id == assignment.definition_id
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):
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resolved.append((assignment, revision))
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return tuple(resolved)
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resolved_assignments: list[tuple[ViewAssignment, ViewRevision]] = []
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for assignment in applicable:
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revision = _assignment_revision(session, assignment)
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if revision is None:
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continue
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resolved_assignments.append((assignment, revision))
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option_assignments: dict[str, tuple[ViewAssignment, ViewRevision]] = {}
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for assignment, revision in resolved_assignments:
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existing = option_assignments.get(assignment.definition_id)
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def _option_assignments(
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assignments: Iterable[ResolvedAssignment],
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) -> dict[str, ResolvedAssignment]:
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options: dict[str, ResolvedAssignment] = {}
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for assignment, revision in assignments:
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existing = options.get(assignment.definition_id)
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if existing is None or _assignment_order(assignment) > _assignment_order(
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existing[0]
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):
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option_assignments[assignment.definition_id] = (assignment, revision)
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options[assignment.definition_id] = (assignment, revision)
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return options
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ordered_options = sorted(
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option_assignments.values(),
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def _available_view_options(
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options: dict[str, ResolvedAssignment],
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) -> tuple[EffectiveViewOption, ...]:
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ordered = sorted(
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options.values(),
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key=lambda item: (
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-_assignment_order(item[0])[0],
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-_assignment_order(item[0])[1],
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@@ -981,186 +1018,438 @@ def resolve_effective_view(
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item[0].definition_id,
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),
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)
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available_views = tuple(
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return tuple(
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EffectiveViewOption(
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id=assignment.definition.id,
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name=assignment.definition.name,
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description=assignment.definition.description,
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revision_id=revision.id,
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)
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for assignment, revision in ordered_options
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for assignment, revision in ordered
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)
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selected: tuple[ViewAssignment, ViewRevision] | None = None
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locked = False
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required = [pair for pair in resolved_assignments if pair[0].mode == "required"]
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preference = _preference(
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session,
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tenant_id=tenant_id,
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account_id=account_id,
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)
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provenance: list[dict[str, object]] = []
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def _assignment_provenance(
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source: str,
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assignment: ViewAssignment,
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detail: str,
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) -> dict[str, object]:
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return {
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"source": source,
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"scope_type": assignment.scope_type,
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"scope_id": assignment.scope_id,
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"detail": detail,
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}
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def _select_effective_assignment(
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assignments: tuple[ResolvedAssignment, ...],
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options: dict[str, ResolvedAssignment],
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*,
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preference: ViewPreference | None,
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account_id: str,
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workflow_view_id: str | None,
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) -> ViewSelection:
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required = [
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pair for pair in assignments if pair[0].mode == "required"
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]
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if required:
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selected = max(required, key=lambda pair: _assignment_order(pair[0]))
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locked = True
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provenance.append(
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{
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"source": "required_assignment",
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"scope_type": selected[0].scope_type,
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"scope_id": selected[0].scope_id,
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"detail": f"Required View assignment {selected[0].id}",
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}
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selected = max(
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required,
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key=lambda pair: _assignment_order(pair[0]),
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)
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elif preference and preference.selection_kind == "none":
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provenance.append(
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{
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"source": "user_selection",
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"scope_type": "user",
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"scope_id": account_id,
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"detail": "Full interface selected",
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}
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return ViewSelection(
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selected=selected,
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locked=True,
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provenance=(
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_assignment_provenance(
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"required_assignment",
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selected[0],
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f"Required View assignment {selected[0].id}",
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),
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),
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)
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elif (
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preference
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and preference.selection_kind == "view"
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and preference.view_id in option_assignments
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):
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selected = option_assignments[preference.view_id]
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provenance.append(
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{
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"source": "user_selection",
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"scope_type": "user",
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"scope_id": account_id,
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"detail": f"Selected View {preference.view_id}",
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}
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)
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else:
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defaults = [pair for pair in resolved_assignments if pair[0].mode == "default"]
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if defaults:
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selected = max(defaults, key=lambda pair: _assignment_order(pair[0]))
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provenance.append(
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{
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"source": "default_assignment",
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"scope_type": selected[0].scope_type,
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"scope_id": selected[0].scope_id,
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"detail": f"Default View assignment {selected[0].id}",
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}
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)
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diagnostics: list[ViewDiagnostic] = []
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if selected is not None and catalogue is not None:
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assignment, revision = selected
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current_catalogue = tuple(catalogue)
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known_surfaces = {surface.id: surface for surface in current_catalogue}
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stale_ids = sorted(set(revision.visible_surface_ids) - set(known_surfaces))
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if stale_ids:
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diagnostics.append(
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ViewDiagnostic(
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severity="warning",
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code="view.stale_surfaces",
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message=(
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"The active View references surfaces that are no longer "
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"announced by the active module graph."
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if workflow_view_id is not None:
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selected = options.get(workflow_view_id)
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if selected is not None:
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return ViewSelection(
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selected=selected,
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locked=False,
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provenance=(
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_assignment_provenance(
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"workflow_selection",
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selected[0],
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f"Workflow selected View {workflow_view_id}",
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),
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surface_ids=tuple(stale_ids),
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)
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),
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)
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if locked:
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try:
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lockout_ids = lockout_required_surface_ids(
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current_catalogue,
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assignment_scope_type=assignment.scope_type,
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)
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unavailable_escape_ids = sorted(
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lockout_ids - set(revision.visible_surface_ids)
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)
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lockout_message = (
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"The required View no longer retains all administration "
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"escape surfaces."
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if unavailable_escape_ids
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else ""
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)
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except ViewsValidationError as exc:
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unavailable_escape_ids = ()
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lockout_message = str(exc)
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if lockout_message:
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diagnostics.append(
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ViewDiagnostic(
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severity="error",
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code="view.lockout_escape_unavailable",
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message=(
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f"{lockout_message} The full authorized interface "
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"is shown until the assignment is repaired."
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),
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surface_ids=tuple(unavailable_escape_ids),
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)
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)
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provenance.append(
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{
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"source": "invalid_view_fallback",
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"scope_type": assignment.scope_type,
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"scope_id": assignment.scope_id,
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"detail": (
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"Required View administration escape is unavailable "
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f"for revision {revision.id}"
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),
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}
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)
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selected = None
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locked = False
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known_visible = [
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known_surfaces[surface_id]
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for surface_id in revision.visible_surface_ids
|
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if surface_id in known_surfaces
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]
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if selected is not None and (
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not any(surface.kind == "navigation" for surface in known_visible)
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or not any(surface.kind == "route" for surface in known_visible)
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):
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diagnostics.append(
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ViewDiagnostic(
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severity="error",
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code="view.no_reachable_surface",
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message=(
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"The active View no longer contains a reachable navigation "
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"entry and route. The full authorized interface is shown."
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),
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)
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diagnostics.append(
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ViewDiagnostic(
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severity="warning",
|
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code="view.workflow_selection_unavailable",
|
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message=(
|
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"The workflow-selected View is not available to this "
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"account. Normal View selection was used."
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),
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)
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provenance.append(
|
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{
|
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"source": "invalid_view_fallback",
|
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"scope_type": assignment.scope_type,
|
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"scope_id": assignment.scope_id,
|
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"detail": f"Invalid View revision {revision.id}",
|
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}
|
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)
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selected = None
|
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locked = False
|
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)
|
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|
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if selected is None:
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effective = EffectiveView(
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if preference and preference.selection_kind == "none":
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return ViewSelection(
|
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selected=None,
|
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locked=False,
|
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provenance=(
|
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{
|
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"source": "user_selection",
|
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"scope_type": "user",
|
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"scope_id": account_id,
|
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"detail": "Full interface selected",
|
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},
|
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),
|
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diagnostics=tuple(diagnostics),
|
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)
|
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if (
|
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preference
|
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and preference.selection_kind == "view"
|
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and preference.view_id in options
|
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):
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selected = options[preference.view_id]
|
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return ViewSelection(
|
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selected=selected,
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locked=False,
|
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provenance=(
|
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{
|
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"source": "user_selection",
|
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"scope_type": "user",
|
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"scope_id": account_id,
|
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"detail": f"Selected View {preference.view_id}",
|
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},
|
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),
|
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diagnostics=tuple(diagnostics),
|
||||
)
|
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|
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defaults = [
|
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pair for pair in assignments if pair[0].mode == "default"
|
||||
]
|
||||
if defaults:
|
||||
selected = max(
|
||||
defaults,
|
||||
key=lambda pair: _assignment_order(pair[0]),
|
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)
|
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return ViewSelection(
|
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selected=selected,
|
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locked=False,
|
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provenance=(
|
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_assignment_provenance(
|
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"default_assignment",
|
||||
selected[0],
|
||||
f"Default View assignment {selected[0].id}",
|
||||
),
|
||||
),
|
||||
diagnostics=tuple(diagnostics),
|
||||
)
|
||||
return ViewSelection(
|
||||
selected=None,
|
||||
locked=False,
|
||||
provenance=(),
|
||||
diagnostics=tuple(diagnostics),
|
||||
)
|
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|
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|
||||
def _evaluate_selected_surfaces(
|
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selection: ViewSelection,
|
||||
*,
|
||||
catalogue: tuple[ViewSurface, ...] | None,
|
||||
) -> ViewSelection:
|
||||
if selection.selected is None or catalogue is None:
|
||||
return selection
|
||||
assignment, revision = selection.selected
|
||||
known_surfaces = {surface.id: surface for surface in catalogue}
|
||||
stale_ids = sorted(
|
||||
set(revision.visible_surface_ids) - set(known_surfaces)
|
||||
)
|
||||
diagnostics = list(selection.diagnostics)
|
||||
provenance = list(selection.provenance)
|
||||
if stale_ids:
|
||||
diagnostics.append(
|
||||
ViewDiagnostic(
|
||||
severity="warning",
|
||||
code="view.stale_surfaces",
|
||||
message=(
|
||||
"The active View references surfaces that are no longer "
|
||||
"announced by the active module graph."
|
||||
),
|
||||
surface_ids=tuple(stale_ids),
|
||||
)
|
||||
)
|
||||
|
||||
if selection.locked:
|
||||
lockout_diagnostic = _required_lockout_diagnostic(
|
||||
assignment,
|
||||
revision,
|
||||
catalogue=catalogue,
|
||||
)
|
||||
if lockout_diagnostic is not None:
|
||||
diagnostics.append(lockout_diagnostic)
|
||||
provenance.append(
|
||||
_fallback_provenance(
|
||||
assignment,
|
||||
detail=(
|
||||
"Required View administration escape is unavailable "
|
||||
f"for revision {revision.id}"
|
||||
),
|
||||
)
|
||||
)
|
||||
return ViewSelection(
|
||||
selected=None,
|
||||
locked=False,
|
||||
provenance=tuple(provenance),
|
||||
diagnostics=tuple(diagnostics),
|
||||
)
|
||||
|
||||
known_visible = [
|
||||
known_surfaces[surface_id]
|
||||
for surface_id in revision.visible_surface_ids
|
||||
if surface_id in known_surfaces
|
||||
]
|
||||
if (
|
||||
not any(surface.kind == "navigation" for surface in known_visible)
|
||||
or not any(surface.kind == "route" for surface in known_visible)
|
||||
):
|
||||
diagnostics.append(
|
||||
ViewDiagnostic(
|
||||
severity="error",
|
||||
code="view.no_reachable_surface",
|
||||
message=(
|
||||
"The active View no longer contains a reachable navigation "
|
||||
"entry and route. The full authorized interface is shown."
|
||||
),
|
||||
)
|
||||
)
|
||||
provenance.append(
|
||||
_fallback_provenance(
|
||||
assignment,
|
||||
detail=f"Invalid View revision {revision.id}",
|
||||
)
|
||||
)
|
||||
return ViewSelection(
|
||||
selected=None,
|
||||
locked=False,
|
||||
provenance=tuple(provenance),
|
||||
diagnostics=tuple(diagnostics),
|
||||
)
|
||||
return ViewSelection(
|
||||
selected=selection.selected,
|
||||
locked=selection.locked,
|
||||
provenance=tuple(provenance),
|
||||
diagnostics=tuple(diagnostics),
|
||||
)
|
||||
|
||||
|
||||
def _required_lockout_diagnostic(
|
||||
assignment: ViewAssignment,
|
||||
revision: ViewRevision,
|
||||
*,
|
||||
catalogue: tuple[ViewSurface, ...],
|
||||
) -> ViewDiagnostic | None:
|
||||
try:
|
||||
required_ids = lockout_required_surface_ids(
|
||||
catalogue,
|
||||
assignment_scope_type=assignment.scope_type,
|
||||
)
|
||||
missing_ids = tuple(
|
||||
sorted(required_ids - set(revision.visible_surface_ids))
|
||||
)
|
||||
message = (
|
||||
"The required View no longer retains all administration escape surfaces."
|
||||
if missing_ids
|
||||
else None
|
||||
)
|
||||
except ViewsValidationError as exc:
|
||||
missing_ids = ()
|
||||
message = str(exc)
|
||||
if message is None:
|
||||
return None
|
||||
return ViewDiagnostic(
|
||||
severity="error",
|
||||
code="view.lockout_escape_unavailable",
|
||||
message=(
|
||||
f"{message} The full authorized interface is shown until the "
|
||||
"assignment is repaired."
|
||||
),
|
||||
surface_ids=missing_ids,
|
||||
)
|
||||
|
||||
|
||||
def _fallback_provenance(
|
||||
assignment: ViewAssignment,
|
||||
*,
|
||||
detail: str,
|
||||
) -> dict[str, object]:
|
||||
return _assignment_provenance(
|
||||
"invalid_view_fallback",
|
||||
assignment,
|
||||
detail,
|
||||
)
|
||||
|
||||
|
||||
def _effective_view_from_selection(selection: ViewSelection) -> EffectiveView:
|
||||
if selection.selected is None:
|
||||
return EffectiveView(
|
||||
view_id=None,
|
||||
revision_id=None,
|
||||
name=None,
|
||||
visible_surface_ids=frozenset(),
|
||||
locked=False,
|
||||
provenance=tuple(provenance),
|
||||
provenance=selection.provenance,
|
||||
)
|
||||
else:
|
||||
assignment, revision = selected
|
||||
effective = EffectiveView(
|
||||
view_id=assignment.definition.id,
|
||||
revision_id=revision.id,
|
||||
name=assignment.definition.name,
|
||||
visible_surface_ids=frozenset(revision.visible_surface_ids),
|
||||
locked=locked,
|
||||
provenance=tuple(provenance),
|
||||
assignment, revision = selection.selected
|
||||
return EffectiveView(
|
||||
view_id=assignment.definition.id,
|
||||
revision_id=revision.id,
|
||||
name=assignment.definition.name,
|
||||
visible_surface_ids=frozenset(revision.visible_surface_ids),
|
||||
locked=selection.locked,
|
||||
provenance=selection.provenance,
|
||||
)
|
||||
|
||||
|
||||
def _resolution_invalidation_token(
|
||||
assignments: Iterable[ResolvedAssignment],
|
||||
*,
|
||||
preference: ViewPreference | None,
|
||||
catalogue: tuple[ViewSurface, ...] | None,
|
||||
workflow_view_id: str | None,
|
||||
) -> str:
|
||||
payload = {
|
||||
"assignments": [
|
||||
{
|
||||
"id": assignment.id,
|
||||
"revision_id": revision.id,
|
||||
"mode": assignment.mode,
|
||||
"priority": assignment.priority,
|
||||
"updated_at": assignment.updated_at.isoformat(),
|
||||
}
|
||||
for assignment, revision in sorted(
|
||||
assignments,
|
||||
key=lambda pair: pair[0].id,
|
||||
)
|
||||
],
|
||||
"preference": (
|
||||
{
|
||||
"selection_kind": preference.selection_kind,
|
||||
"view_id": preference.view_id,
|
||||
"updated_at": preference.updated_at.isoformat(),
|
||||
}
|
||||
if preference is not None
|
||||
else None
|
||||
),
|
||||
"surfaces": (
|
||||
sorted(
|
||||
(
|
||||
surface.id,
|
||||
surface.module_id,
|
||||
surface.kind,
|
||||
surface.parent_id,
|
||||
surface.required,
|
||||
)
|
||||
for surface in catalogue
|
||||
)
|
||||
if catalogue is not None
|
||||
else None
|
||||
),
|
||||
"workflow_view_id": workflow_view_id,
|
||||
}
|
||||
encoded = json.dumps(
|
||||
payload,
|
||||
sort_keys=True,
|
||||
separators=(",", ":"),
|
||||
).encode("utf-8")
|
||||
return hashlib.sha256(encoded).hexdigest()
|
||||
|
||||
|
||||
def resolve_effective_view(
|
||||
session: Session,
|
||||
*,
|
||||
tenant_id: str,
|
||||
account_id: str,
|
||||
group_ids: Iterable[str] = (),
|
||||
catalogue: Iterable[ViewSurface] | None = None,
|
||||
workflow_view_id: str | None = None,
|
||||
) -> EffectiveViewState:
|
||||
groups = frozenset(str(group_id) for group_id in group_ids)
|
||||
if len(groups) > MAX_EFFECTIVE_VIEW_GROUPS:
|
||||
raise ViewsValidationError(
|
||||
"Too many group memberships were supplied for View resolution"
|
||||
)
|
||||
current_catalogue = tuple(catalogue) if catalogue is not None else None
|
||||
candidates, overflow = _collect_effective_view_candidates(
|
||||
session,
|
||||
tenant_id=tenant_id,
|
||||
account_id=account_id,
|
||||
group_ids=groups,
|
||||
)
|
||||
if overflow:
|
||||
diagnostic = ViewDiagnostic(
|
||||
severity="error",
|
||||
code="view.assignment_limit_exceeded",
|
||||
message=(
|
||||
"View resolution exceeded its assignment safety limit. The "
|
||||
"full authorized interface is shown."
|
||||
),
|
||||
)
|
||||
return EffectiveViewState(
|
||||
effective=_effective_view_from_selection(
|
||||
ViewSelection(
|
||||
selected=None,
|
||||
locked=False,
|
||||
provenance=(
|
||||
{
|
||||
"source": "invalid_view_fallback",
|
||||
"scope_type": "user",
|
||||
"scope_id": account_id,
|
||||
"detail": "View assignment safety limit exceeded",
|
||||
},
|
||||
),
|
||||
diagnostics=(diagnostic,),
|
||||
)
|
||||
),
|
||||
available_views=(),
|
||||
diagnostics=(diagnostic,),
|
||||
)
|
||||
resolved_assignments = _resolve_assignment_revisions(
|
||||
session,
|
||||
candidates,
|
||||
)
|
||||
options = _option_assignments(resolved_assignments)
|
||||
preference = _preference(
|
||||
session,
|
||||
tenant_id=tenant_id,
|
||||
account_id=account_id,
|
||||
)
|
||||
selection = _select_effective_assignment(
|
||||
resolved_assignments,
|
||||
options,
|
||||
preference=preference,
|
||||
account_id=account_id,
|
||||
workflow_view_id=workflow_view_id,
|
||||
)
|
||||
evaluated = _evaluate_selected_surfaces(
|
||||
selection,
|
||||
catalogue=current_catalogue,
|
||||
)
|
||||
return EffectiveViewState(
|
||||
effective=effective,
|
||||
available_views=available_views,
|
||||
diagnostics=tuple(diagnostics),
|
||||
effective=_effective_view_from_selection(evaluated),
|
||||
available_views=_available_view_options(options),
|
||||
diagnostics=evaluated.diagnostics,
|
||||
invalidation_token=_resolution_invalidation_token(
|
||||
resolved_assignments,
|
||||
preference=preference,
|
||||
catalogue=current_catalogue,
|
||||
workflow_view_id=workflow_view_id,
|
||||
),
|
||||
)
|
||||
|
||||
|
||||
|
||||
Reference in New Issue
Block a user