214 lines
9.3 KiB
Python
214 lines
9.3 KiB
Python
"""Validation and normalization helpers for run configuration payloads."""
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from __future__ import annotations
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from typing import Any
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from python_app.models.run_config_schema import (
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ComboModel,
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ControlButtonModel,
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GprModel,
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RadarSweepModel,
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RingEndpointModel,
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SwitchModel,
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)
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# Wire-format bounds shared with the C++ pipeline. The ring header stores the
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# slot size as a uint32, and capacity * slot_size must address into a single
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# shared-memory mapping, so reject values the C++ side cannot represent.
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_UINT32_MAX = (1 << 32) - 1
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_RING_SEGMENT_MAX_BYTES = 1 << 40 # 1 TiB upper bound on a single ring mapping.
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# Defensive ceiling so a malformed combos string cannot expand into a list that
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# stalls the GUI or the downstream acquisition loop.
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_MAX_COMBOS = 4096
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def _require_int(payload: dict[str, Any], key: str, default: int) -> int:
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"""Read an integer field, rejecting JSON arrays/objects with a named ValueError.
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Bare ``int()`` raises ``TypeError`` on a list/dict, which escapes the
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config-error contract; surface it as a ValueError naming the field instead.
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"""
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value = payload.get(key, default)
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if value is None: # explicit JSON null -> use the default, never coerce
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return default
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if isinstance(value, bool) or not isinstance(value, (int, float, str)):
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raise ValueError(f"{key} must be a JSON integer")
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try:
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return int(value)
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except (TypeError, ValueError) as exc:
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raise ValueError(f"{key} must be a JSON integer") from exc
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def _require_str(payload: dict[str, Any], key: str, default: str) -> str:
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"""Read a string field, rejecting JSON arrays/objects with a named ValueError."""
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value = payload.get(key, default)
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if value is None: # explicit JSON null -> use the default, never coerce to "None"
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return default
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if isinstance(value, (dict, list)):
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raise ValueError(f"{key} must be a JSON string")
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return str(value)
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def _require_bool(payload: dict[str, Any], key: str, default: bool) -> bool:
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"""Read a boolean field, rejecting non-boolean JSON types with a named ValueError."""
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value = payload.get(key, default)
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if value is None: # explicit JSON null -> use the default
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return default
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if not isinstance(value, bool):
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raise ValueError(f"{key} must be a JSON boolean")
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return value
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def load_switch_payload(
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payload: dict[str, Any],
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target: SwitchModel,
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) -> None:
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"""Populate switch model from payload preserving defaults for missing values."""
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# #53: scalar reads reject array/object JSON types as ValueError (not TypeError).
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target.name = _require_str(payload, "name", target.name)
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target.driver_mode = _require_str(payload, "driver_mode", target.driver_mode)
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target.driver = _require_str(payload, "driver", target.driver)
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target.radar_port = _require_int(payload, "radar_port", target.radar_port)
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target.positions = _require_int(payload, "positions", target.positions)
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target.default_position = _require_int(payload, "default_position", target.default_position)
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target.gpio_chip = _require_str(payload, "gpio_chip", target.gpio_chip)
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target.pin_a = _require_int(payload, "pin_a", target.pin_a)
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target.pin_b = _require_int(payload, "pin_b", target.pin_b)
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target.invert_logic = _require_bool(payload, "invert_logic", target.invert_logic)
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def load_control_button_payload(
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payload: dict[str, Any],
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target: ControlButtonModel,
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) -> None:
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"""Populate control-button model from payload preserving defaults."""
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# #53: scalar reads reject array/object JSON types as ValueError (not TypeError).
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target.enabled = _require_bool(payload, "enabled", target.enabled)
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target.gpio_chip = _require_str(payload, "gpio_chip", target.gpio_chip)
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target.pin = _require_int(payload, "pin", target.pin)
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target.active_low = _require_bool(payload, "active_low", target.active_low)
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target.bias = _require_str(payload, "bias", target.bias)
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target.debounce_ms = _require_int(payload, "debounce_ms", target.debounce_ms)
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target.action = _require_str(payload, "action", target.action)
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def load_ring_payload(payload: dict[str, Any], target: RingEndpointModel) -> None:
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"""Populate ring endpoint model from payload preserving defaults."""
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# #53: scalar reads reject array/object JSON types as ValueError (not TypeError).
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target.name = _require_str(payload, "name", target.name)
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target.capacity = _require_int(payload, "capacity", target.capacity)
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target.slot_size_bytes = _require_int(payload, "slot_size_bytes", target.slot_size_bytes)
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# #36: enforce ring sizing in Python so a bad config fails here (in GUI/save and
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# at config load) instead of crashing the C++ ring allocator at boot.
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validate_ring_endpoint(target)
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def validate_ring_endpoint(ring: RingEndpointModel) -> None:
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"""Validate ring sizing against the constraints the C++ allocator requires."""
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field = ring.name or "ring"
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if ring.capacity <= 0:
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raise ValueError(f"rings.{field}.capacity must be > 0")
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if ring.slot_size_bytes <= 0:
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raise ValueError(f"rings.{field}.slot_size_bytes must be > 0")
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if ring.slot_size_bytes > _UINT32_MAX:
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raise ValueError(f"rings.{field}.slot_size_bytes exceeds the uint32 wire limit")
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# Overflow-safe: compare against the ceiling without ever forming the full
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# product, so an attacker-sized capacity cannot wrap a fixed-width index.
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if ring.capacity > _RING_SEGMENT_MAX_BYTES // ring.slot_size_bytes:
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raise ValueError(
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f"rings.{field} capacity * slot_size_bytes exceeds the maximum ring segment size"
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)
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def validate_sweep_model(sweep: RadarSweepModel) -> None:
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"""Validate radar sweep bounds in Python so a bad sweep fails in the GUI/save
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and at config load rather than aborting the C++ acquisition process at boot.
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"""
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# #36: points must be a positive, integral count of frequency samples.
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points = sweep.points
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if isinstance(points, bool) or not isinstance(points, int):
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raise ValueError("radar.sweep.points must be an integer")
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if points <= 0:
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raise ValueError("radar.sweep.points must be > 0")
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if float(sweep.stop_hz) < float(sweep.start_hz):
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raise ValueError("radar.sweep.stop_hz must be >= radar.sweep.start_hz")
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def validate_gpr_model(
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gpr: GprModel,
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*,
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input_switch_positions: int,
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output_switch_positions: int,
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sweep: RadarSweepModel | None = None,
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) -> None:
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"""Validate stable GPR config against current switch dimensions.
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When ``sweep`` is supplied (load and GUI/save paths share this chokepoint),
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its bounds are validated here too so #36 sweep failures surface alongside the
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GPR checks instead of as a C++ boot crash.
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"""
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if sweep is not None:
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validate_sweep_model(sweep)
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if float(gpr.relative_permittivity) <= 0.0:
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raise ValueError("gpr.relative_permittivity must be > 0")
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seen_output_positions: set[int] = set()
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for entry in gpr.tx_geometry:
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output_pos = int(entry.output_pos)
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if output_pos < 0 or output_pos >= int(output_switch_positions):
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raise ValueError("gpr.tx_geometry output_pos is out of range")
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if output_pos in seen_output_positions:
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raise ValueError("gpr.tx_geometry contains duplicate output_pos")
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seen_output_positions.add(output_pos)
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seen_input_positions: set[int] = set()
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for entry in gpr.rx_geometry:
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input_pos = int(entry.input_pos)
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if input_pos < 0 or input_pos >= int(input_switch_positions):
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raise ValueError("gpr.rx_geometry input_pos is out of range")
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if input_pos in seen_input_positions:
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raise ValueError("gpr.rx_geometry contains duplicate input_pos")
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seen_input_positions.add(input_pos)
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def parse_combos_from_text(text: str) -> list[ComboModel]:
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"""Parse UI combos string in `input:output,input:output` format."""
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cleaned = text.strip()
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if not cleaned:
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return []
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combos: list[ComboModel] = []
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for item in cleaned.split(","):
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pair = item.strip()
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if not pair:
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continue
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if ":" not in pair:
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raise ValueError(f"Invalid combo syntax: {pair!r}. Expected input:output")
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# #57: cap the combo count so a pathological string cannot expand into a
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# list large enough to stall the GUI or the acquisition loop.
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if len(combos) >= _MAX_COMBOS:
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raise ValueError(f"Too many combos: limit is {_MAX_COMBOS}")
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input_text, output_text = (side.strip() for side in pair.split(":", 1))
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# #57: reject empty sides and re-raise non-integer values naming the pair/side.
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if not input_text:
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raise ValueError(f"Invalid combo {pair!r}: input side is empty")
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if not output_text:
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raise ValueError(f"Invalid combo {pair!r}: output side is empty")
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try:
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input_value = int(input_text)
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except ValueError as exc:
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raise ValueError(f"Invalid combo {pair!r}: input {input_text!r} is not an integer") from exc
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try:
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output_value = int(output_text)
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except ValueError as exc:
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raise ValueError(f"Invalid combo {pair!r}: output {output_text!r} is not an integer") from exc
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combos.append(ComboModel(input=input_value, output=output_value))
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if not combos:
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raise ValueError("No valid combos were provided")
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return combos
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