104 lines
4.1 KiB
Python
104 lines
4.1 KiB
Python
"""
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Backup / DR readiness matrix snapshot.
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Loads the latest committed, read-only Backup / DR readiness matrix. The matrix
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is visibility-only; it does not run backups, restore drills, offsite sync,
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credential marker writes, schedule changes, or destructive prune.
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"""
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from __future__ import annotations
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import json
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from pathlib import Path
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from typing import Any
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from src.services.snapshot_paths import default_evaluations_dir
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_DEFAULT_EVALUATIONS_DIR = default_evaluations_dir(Path(__file__))
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_SNAPSHOT_PATTERN = "backup_dr_readiness_matrix_*.json"
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_SCHEMA_VERSION = "backup_dr_readiness_matrix_v1"
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def load_latest_backup_dr_readiness_matrix(
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evaluations_dir: Path | None = None,
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) -> dict[str, Any]:
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"""Load the newest committed Backup / DR readiness matrix snapshot."""
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directory = evaluations_dir or _DEFAULT_EVALUATIONS_DIR
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candidates = sorted(directory.glob(_SNAPSHOT_PATTERN))
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if not candidates:
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raise FileNotFoundError(f"no Backup / DR readiness matrix snapshots found in {directory}")
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latest = candidates[-1]
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with latest.open(encoding="utf-8") as handle:
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payload = json.load(handle)
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if not isinstance(payload, dict):
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raise ValueError(f"{latest}: expected JSON object")
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_require_schema(payload, _SCHEMA_VERSION, str(latest))
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_require_read_only_boundaries(payload, str(latest))
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_require_operation_boundaries(payload, str(latest))
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_require_rollup_consistency(payload, str(latest))
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return payload
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def _require_schema(payload: dict[str, Any], expected: str, label: str) -> None:
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actual = payload.get("schema_version")
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if actual != expected:
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raise ValueError(f"{label}: expected schema_version={expected}, got {actual!r}")
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def _require_read_only_boundaries(payload: dict[str, Any], label: str) -> None:
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program_status = payload.get("program_status") or {}
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if program_status.get("read_only_mode") is not True:
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raise ValueError(f"{label}: program_status.read_only_mode must be true")
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boundaries = payload.get("approval_boundaries") or {}
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blocked_flags = {
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"sdk_installation_allowed",
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"paid_api_call_allowed",
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"shadow_or_canary_allowed",
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"production_routing_allowed",
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"destructive_operation_allowed",
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}
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allowed = sorted(flag for flag in blocked_flags if boundaries.get(flag) is not False)
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if allowed:
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raise ValueError(f"{label}: approval boundaries must remain false: {allowed}")
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def _require_operation_boundaries(payload: dict[str, Any], label: str) -> None:
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boundaries = payload.get("operation_boundaries") or {}
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if boundaries.get("read_only_api_allowed") is not True:
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raise ValueError(f"{label}: read_only_api_allowed must be true")
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blocked_flags = {
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"backup_execution_allowed",
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"restore_execution_allowed",
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"offsite_sync_execution_allowed",
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"credential_marker_write_allowed",
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"schedule_change_allowed",
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"destructive_prune_allowed",
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}
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allowed = sorted(flag for flag in blocked_flags if boundaries.get(flag) is not False)
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if allowed:
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raise ValueError(f"{label}: operation boundaries must remain false: {allowed}")
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def _require_rollup_consistency(payload: dict[str, Any], label: str) -> None:
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rows = payload.get("readiness_rows") or []
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rollups = payload.get("rollups") or {}
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total = rollups.get("total_rows")
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if total != len(rows):
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raise ValueError(f"{label}: rollups.total_rows must equal readiness_rows length")
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blocked_row_ids = set(rollups.get("blocked_row_ids") or [])
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actual_blocked = {row.get("target_id") for row in rows if row.get("overall_readiness") == "blocked"}
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if blocked_row_ids != actual_blocked:
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raise ValueError(f"{label}: rollups.blocked_row_ids must match blocked rows")
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action_required_ids = set(rollups.get("action_required_row_ids") or [])
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actual_action_required = {
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row.get("target_id") for row in rows if row.get("overall_readiness") == "action_required"
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}
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if action_required_ids != actual_action_required:
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raise ValueError(f"{label}: rollups.action_required_row_ids must match action_required rows")
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