580 lines
22 KiB
Python
580 lines
22 KiB
Python
"""Route the image to the worker, map the outputs onto the quotes, save.
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This module never imports VisionSuite - see test_vision_boundary.py. It speaks
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to the worker over HTTP and stays ignorant of how a number was produced.
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"""
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from __future__ import annotations
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import hashlib
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import json
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import math
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from pathlib import Path
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from uuid import uuid4
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import httpx
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from fastapi import HTTPException, status
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from sqlalchemy import select
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from sqlalchemy.ext.asyncio import AsyncSession
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from src.backend.config import settings
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from src.backend.models.orm.measurement import Measurement
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from src.backend.models.orm.recipe import RecipeVersion
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from src.backend.models.orm.task import RecipeSubtask, RecipeTask
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from src.backend.models.orm.vision import VisionReferenceImage, VisionResult
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from src.backend.services import measurement_service
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# Worker responses whose status and reason are forwarded as-is rather than
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# flattened into a generic 502 - see `_call_worker`.
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_FORWARDED_WORKER_STATUSES = frozenset({
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status.HTTP_422_UNPROCESSABLE_CONTENT,
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status.HTTP_503_SERVICE_UNAVAILABLE,
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status.HTTP_504_GATEWAY_TIMEOUT,
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})
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def _is_measurable(value: object) -> bool:
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"""A worker output counts as a quote only if it is a finite, non-bool number.
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None (absent, or explicitly null in a malformed response), a bool (a
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subclass of int), and NaN/inf all fail this - each one would otherwise
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reach `float()` and either crash with a bare TypeError or silently save a
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value nobody could have measured.
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"""
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return (
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isinstance(value, (int, float))
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and not isinstance(value, bool)
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and math.isfinite(value)
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)
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async def _call_worker(
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image_bytes: bytes,
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graph: dict,
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*,
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recipe_dir: str | None = None,
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calibration: dict | None = None,
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) -> dict:
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"""The one place that talks to the worker; the tests replace it.
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The worker's fault must not become the API's fault (spec's edge-case
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table: "il worker isola il guasto, l'API resta in piedi, il task
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riporta l'errore"). httpx.TimeoutException (ConnectTimeout, ReadTimeout,
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WriteTimeout, PoolTimeout) becomes 504; every other transport failure
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(ConnectError, ReadError, RemoteProtocolError when the worker dies
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mid-response, ...) becomes 502 - both would otherwise propagate past
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this function and surface to the operator as a naked 500. The response
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shape is validated here too: a proxy answering 200 with something that
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is not the worker's JSON contract must not turn into a bare KeyError
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further down.
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"""
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# recipe_dir (relativo, #46) e calibration sono opzionali: se assenti non
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# si mandano, il worker usa i suoi default.
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data = {"graph": json.dumps(graph)}
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if recipe_dir:
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data["recipe_dir"] = recipe_dir
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if calibration:
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data["calibration"] = json.dumps(calibration)
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try:
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async with httpx.AsyncClient(timeout=120.0) as client:
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response = await client.post(
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f"{settings.vision_worker_url}/run",
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files={"image": ("frame.png", image_bytes, "image/png")},
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data=data,
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)
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except httpx.TimeoutException as exc:
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raise HTTPException(
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status_code=status.HTTP_504_GATEWAY_TIMEOUT,
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detail=f"the vision worker did not answer in time: {exc}",
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) from exc
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except (httpx.TransportError, httpx.HTTPError) as exc:
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raise HTTPException(
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status_code=status.HTTP_502_BAD_GATEWAY,
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detail=f"the vision worker is unreachable: {exc}",
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) from exc
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# The worker already gave this fault a name - forward its status and
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# reason instead of flattening every non-200 into a generic 502: 422 is a
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# bad request (undecodable image, malformed graph), 503 is "busy, try
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# again" (VISION_MAX_CONCURRENCY exceeded), 504 is its own run timeout
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# (VISION_RUN_TIMEOUT_S, always tighter than this client's own 120s so
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# the worker answers first).
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if response.status_code in _FORWARDED_WORKER_STATUSES:
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try:
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detail = response.json().get("detail", response.text)
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except ValueError:
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detail = response.text
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raise HTTPException(status_code=response.status_code, detail=detail)
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if response.status_code != 200:
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raise HTTPException(
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status_code=status.HTTP_502_BAD_GATEWAY,
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detail=f"the vision worker refused the job: {response.text}",
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)
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try:
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report = response.json()
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except ValueError as exc:
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raise HTTPException(
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status_code=status.HTTP_502_BAD_GATEWAY,
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detail=f"the vision worker's answer was malformed: not valid JSON ({exc})",
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) from exc
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if not isinstance(report, dict):
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raise HTTPException(
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status_code=status.HTTP_502_BAD_GATEWAY,
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detail="the vision worker's answer was malformed: expected a JSON object",
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)
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missing = {"outputs", "failures", "engine_version"} - report.keys()
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if missing:
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raise HTTPException(
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status_code=status.HTTP_502_BAD_GATEWAY,
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detail=(
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"the vision worker's answer was malformed: missing "
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f"{', '.join(sorted(missing))}"
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),
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)
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return report
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async def validate_recipe(graph: dict, recipe_dir: str | None) -> dict:
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"""Ask the worker's /validate whether a v2 recipe is loadable (#46).
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Returns {"ok", "errors", "outputs"}. A worker 422 (e.g. recipe_dir
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refused) is folded into ok=False; transport faults become 502/504 as in
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`_call_worker`. Replaced by the tests.
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"""
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data = {"graph": json.dumps(graph)}
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if recipe_dir:
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data["recipe_dir"] = recipe_dir
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try:
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async with httpx.AsyncClient(timeout=60.0) as client:
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response = await client.post(
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f"{settings.vision_worker_url}/validate", data=data,
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)
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except httpx.TimeoutException as exc:
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raise HTTPException(
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status_code=status.HTTP_504_GATEWAY_TIMEOUT,
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detail=f"the vision worker did not answer in time: {exc}",
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) from exc
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except httpx.HTTPError as exc:
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raise HTTPException(
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status_code=status.HTTP_502_BAD_GATEWAY,
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detail=f"the vision worker is unreachable: {exc}",
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) from exc
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if response.status_code == status.HTTP_422_UNPROCESSABLE_CONTENT:
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try:
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detail = response.json().get("detail", response.text)
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except ValueError:
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detail = response.text
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errors = detail if isinstance(detail, list) else [str(detail)]
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return {"ok": False, "errors": [str(e) for e in errors], "outputs": []}
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if response.status_code != 200:
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raise HTTPException(
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status_code=status.HTTP_502_BAD_GATEWAY,
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detail=f"the vision worker refused the job: {response.text}",
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)
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try:
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body = response.json()
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except ValueError as exc:
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raise HTTPException(
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status_code=status.HTTP_502_BAD_GATEWAY,
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detail="the vision worker's answer was malformed: not valid JSON",
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) from exc
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if not isinstance(body, dict) or "ok" not in body:
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raise HTTPException(
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status_code=status.HTTP_502_BAD_GATEWAY,
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detail="the vision worker's answer was malformed: missing ok",
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)
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body.setdefault("errors", [])
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body.setdefault("outputs", [])
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return body
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# Task types that run a vision graph (#46).
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VISION_TASK_TYPES = ("camera_measure", "dxf_compare")
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def _safe_join(root: Path, relative: str) -> Path:
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"""root/relative, refusing absolute paths, '..' and anything leaving root."""
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candidate = Path(relative)
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if candidate.is_absolute() or ".." in candidate.parts or not candidate.parts:
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raise ValueError(f"unsafe path: {relative}")
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full = (root / candidate).resolve()
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if not full.is_relative_to(root.resolve()):
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raise ValueError(f"unsafe path: {relative}")
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return full
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def collect_meta_paths(node: object) -> list[str]:
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"""Every `path` string found in any dict under the recipe's `meta`."""
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found: list[str] = []
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if isinstance(node, dict):
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for key, value in node.items():
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if key == "path" and isinstance(value, str):
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found.append(value)
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else:
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found.extend(collect_meta_paths(value))
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elif isinstance(node, list):
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for item in node:
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found.extend(collect_meta_paths(item))
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return found
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def match_recipe_files(
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recipe: dict, uploads: list[tuple[str, bytes]],
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) -> tuple[dict[str, bytes], list[str]]:
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"""Pair each uploaded file with a meta path by base name (#46).
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Returns ({relative path: bytes}, errors). Errors list every upload that
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has no name or matches no meta path, and every unsafe meta path. A meta
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path left without a file is not an error here: /validate decides.
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"""
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paths = collect_meta_paths(recipe.get("meta", {}))
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by_name: dict[str, str] = {}
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for p in paths:
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by_name.setdefault(Path(p.replace("\\", "/")).name, p)
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placed: dict[str, bytes] = {}
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errors: list[str] = []
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for name, content in uploads:
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if not name:
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errors.append("a file has no name")
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continue
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target = by_name.get(Path(name.replace("\\", "/")).name)
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if target is None:
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errors.append(f"file {name!r} matches no path in the recipe's meta")
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continue
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try:
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_safe_join(Path("."), target)
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except ValueError:
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errors.append(f"meta path {target!r} is not allowed")
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continue
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placed[target] = content
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return placed, errors
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def store_recipe_folder(
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task_id: int, recipe: dict, files: dict[str, bytes],
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) -> str:
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"""Write the immutable recipe folder; return its path relative to uploads.
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Folder name = first 16 hex of the recipe's sha256. If it already exists it
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is left untouched (immutable: other task versions may reference it).
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"""
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canonical = json.dumps(recipe, sort_keys=True, separators=(",", ":"))
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digest = hashlib.sha256(canonical.encode("utf-8")).hexdigest()[:16]
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relative = f"vision/recipes/{task_id}/{digest}"
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folder = settings.upload_path / relative
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if folder.exists():
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return relative
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folder.mkdir(parents=True, exist_ok=True)
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(folder / "recipe.json").write_text(
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json.dumps(recipe, indent=2, ensure_ascii=False), encoding="utf-8",
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)
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for rel, content in files.items():
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target = _safe_join(folder, rel)
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target.parent.mkdir(parents=True, exist_ok=True)
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target.write_bytes(content)
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return relative
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def list_recipe_files(recipe_dir: str | None) -> list[str]:
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"""Files of a recipe folder, relative to it (recipe.json excluded)."""
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if not recipe_dir:
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return []
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try:
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folder = _safe_join(settings.upload_path, recipe_dir)
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except ValueError:
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return []
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if not folder.is_dir():
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return []
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return sorted(
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p.relative_to(folder).as_posix()
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for p in folder.rglob("*") if p.is_file() and p.name != "recipe.json"
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)
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def save_result_files(
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task_id: int, image_bytes: bytes, overlay: list, image_ext: str = "png",
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) -> tuple[str, str]:
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"""Save the executed image and its overlay JSON side by side (#46).
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Returns (image_path, overlay_path), both relative to uploads.
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"""
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stem = uuid4().hex
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base = Path("vision") / "results" / str(task_id)
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(settings.upload_path / base).mkdir(parents=True, exist_ok=True)
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image_rel = (base / f"{stem}.{image_ext}").as_posix()
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overlay_rel = (base / f"{stem}.overlay.json").as_posix()
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(settings.upload_path / image_rel).write_bytes(image_bytes)
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(settings.upload_path / overlay_rel).write_text(json.dumps(overlay), encoding="utf-8")
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return image_rel, overlay_rel
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async def execute_task(
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db: AsyncSession,
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task: RecipeTask,
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image_bytes: bytes,
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measured_by: int,
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*,
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version_id: int,
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lot_number: str | None = None,
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serial_number: str | None = None,
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production_run_id: int | None = None,
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image_ext: str = "png",
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) -> tuple[VisionResult, list[Measurement], dict]:
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if task.task_type not in VISION_TASK_TYPES:
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raise HTTPException(
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status_code=status.HTTP_422_UNPROCESSABLE_CONTENT,
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detail=f"task type {task.task_type!r} is not a camera measurement",
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)
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version = (await db.execute(
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select(RecipeVersion).where(RecipeVersion.id == version_id)
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)).scalar_one_or_none()
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if version is None or not version.is_current:
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raise HTTPException(
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status_code=status.HTTP_409_CONFLICT,
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detail="this task's recipe version is no longer current",
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)
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recipe = await measurement_service.recipe_of_version(db, version_id)
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if recipe is None or not recipe.active:
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raise HTTPException(
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status_code=status.HTTP_409_CONFLICT,
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detail="this recipe is not active",
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)
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if production_run_id is not None:
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# 404 if the run does not exist, 422 if it belongs to another recipe,
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# 409 if it is closed or paused - same rule a manual reading follows.
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await measurement_service.validate_run_for_version(
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db, production_run_id, version_id,
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)
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if not task.vision_json:
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raise HTTPException(
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status_code=status.HTTP_422_UNPROCESSABLE_CONTENT,
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detail="this task carries no vision graph",
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)
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# Ordered by marker_number - the number the operator sees on the annotated
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# image and in reports (RecipeSubtask.__repr__, statistics.py, report_service.py
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# all key off it). Which quote is saved first must never be an accident of
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# how SQLite/MySQL happens to return rows.
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quotes = (await db.execute(
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select(RecipeSubtask)
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.where(RecipeSubtask.task_id == task.id)
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.where(RecipeSubtask.vision_output.is_not(None))
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.order_by(RecipeSubtask.marker_number)
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)).scalars().all()
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if not quotes:
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raise HTTPException(
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status_code=status.HTTP_422_UNPROCESSABLE_CONTENT,
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detail="no quote on this task names a vision output",
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)
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# Ruling R10: the gate is evaluated once per acquisition, not once per
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# quote. `save_measurement`'s own gate models "moving on" between
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# measurements taken one after another - a real later moment where the
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# operator could leave a bad reading behind. A camera acquisition produces
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# every quote of this task at the same instant: there is no "moving on"
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# between them, so applying the sequential rule inside the batch would
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# block on a fail this very request just saved. Check it once here,
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# against the whole set this acquisition is about to produce, and pass
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# enforce_tolerance_gate=False to every save_measurement call below.
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#
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# Checked before the worker runs (M3): a blocked operator finds out
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# without burning a whole vision execution first - the worker is the
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# expensive part, the gate check is not.
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blocking = await measurement_service.pending_authorisation(
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db, version_id, measured_by, production_run_id,
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)
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quote_ids = {q.id for q in quotes}
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if blocking is not None and blocking.subtask_id not in quote_ids:
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raise HTTPException(
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status_code=status.HTTP_409_CONFLICT,
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detail=(
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"A measurement is out of tolerance and awaiting the supervisor: "
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"authorise it or measure that quote again before going on"
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),
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)
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# Nessuna fonte di calibrazione esiste oggi (ne' task ne' stazione): non si
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# passa `calibration`, la ricetta porta la sua (#46).
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report = await _call_worker(
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image_bytes, task.vision_json, recipe_dir=task.vision_recipe_dir,
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)
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outputs = report["outputs"]
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# Every quote or none. A half-measured piece read as a whole one is worse
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# than a piece not measured at all. A quote counts as produced only if its
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# output is present *and* a finite, non-bool number: the in-process runner
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# already drops NaN/inf itself (see src/vision/runner.py), but the worker
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# is reached over HTTP - a different implementation of it, or a malformed
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# response, could still hand back None or a non-finite float for a mapped
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# key instead of omitting it outright.
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missing = [q.vision_output for q in quotes if not _is_measurable(outputs.get(q.vision_output))]
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if missing:
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failed = ", ".join(f["tool_name"] for f in report["failures"])
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raise HTTPException(
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status_code=status.HTTP_422_UNPROCESSABLE_CONTENT,
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detail=(
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f"the graph did not produce {', '.join(missing)}"
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+ (f" (tools that failed: {failed})" if failed else "")
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),
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)
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overlay = report.get("overlay") or []
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image_path, overlay_path = save_result_files(task.id, image_bytes, overlay, image_ext)
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result = VisionResult(
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task_id=task.id,
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image_path=image_path,
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overlay_path=overlay_path,
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engine_version=report["engine_version"],
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executed_on="server",
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graph_snapshot=task.vision_json,
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duration_ms=report.get("duration_ms"),
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)
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db.add(result)
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await db.flush()
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saved: list[Measurement] = []
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for quote in quotes:
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saved.append(await measurement_service.save_measurement(
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db,
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subtask_id=quote.id,
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version_id=version_id,
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measured_by=measured_by,
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value=float(outputs[quote.vision_output]),
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lot_number=lot_number,
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serial_number=serial_number,
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input_method="camera",
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production_run_id=production_run_id,
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vision_result_id=result.id,
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enforce_tolerance_gate=False,
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))
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return result, saved, report
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def _reference_file_path(reference: VisionReferenceImage) -> Path:
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return settings.upload_path / reference.path
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def remove_reference_file(reference: VisionReferenceImage) -> None:
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"""Delete a reference image's file, if it is still there.
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Called by the router only once the row's fate is durable: after a
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successful commit when the row was just deleted, or to undo a
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`save_reference_image` whose row failed to commit (see both call sites).
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`missing_ok` because "already gone" must never be an error here.
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"""
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_reference_file_path(reference).unlink(missing_ok=True)
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|
|
|
async def file_still_referenced(db: AsyncSession, path: str) -> bool:
|
|
"""True if some VisionReferenceImage row still points at *path*.
|
|
|
|
Copy-on-write (#38.6) can leave several rows sharing the same file on
|
|
disk (the copy carries over the source's `path` rather than duplicating
|
|
the file). The router must call this, after the row being deleted has
|
|
been committed, before it calls `remove_reference_file` - otherwise
|
|
deleting one task's reference would take the file out from under every
|
|
other task that still references it.
|
|
"""
|
|
result = await db.execute(
|
|
select(VisionReferenceImage.id).where(VisionReferenceImage.path == path).limit(1)
|
|
)
|
|
return result.scalar_one_or_none() is not None
|
|
|
|
|
|
async def save_reference_image(
|
|
db: AsyncSession,
|
|
task_id: int,
|
|
image_bytes: bytes,
|
|
*,
|
|
note: str | None = None,
|
|
station_id: int | None = None,
|
|
device_code: str | None = None,
|
|
calibration_snapshot: dict | None = None,
|
|
extension: str = "png",
|
|
) -> VisionReferenceImage:
|
|
"""Keep an image so the graph can be composed and re-tried without a camera.
|
|
|
|
`extension` must match the upload's real content type (the router derives
|
|
it from `image.content_type`) - writing a jpeg to disk as `<uuid>.png`
|
|
would be a lie the filename tells forever.
|
|
|
|
The file is written only after the row has flushed successfully - a bad
|
|
FK or constraint fails at `flush()`, before anything exists on disk, so
|
|
there is nothing to clean up. The caller still has to remove the file if
|
|
the *commit* that follows fails (`remove_reference_file`, from the
|
|
router): a flush is not durable, and an orphaned file from a rolled-back
|
|
row is exactly what #38 found.
|
|
"""
|
|
# `upload_path` is the resolved Path, `upload_dir` the bare setting: the
|
|
# rest of the codebase uses the former (see production_export_service).
|
|
name = f"{uuid4().hex}.{extension}"
|
|
relative_path = str(Path("vision") / "reference" / str(task_id) / name)
|
|
|
|
reference = VisionReferenceImage(
|
|
task_id=task_id,
|
|
path=relative_path,
|
|
note=note,
|
|
station_id=station_id,
|
|
device_code=device_code,
|
|
calibration_snapshot=calibration_snapshot,
|
|
)
|
|
db.add(reference)
|
|
await db.flush()
|
|
|
|
folder = _reference_file_path(reference).parent
|
|
folder.mkdir(parents=True, exist_ok=True)
|
|
_reference_file_path(reference).write_bytes(image_bytes)
|
|
|
|
await db.refresh(reference)
|
|
return reference
|
|
|
|
|
|
async def list_reference_images(
|
|
db: AsyncSession, task_id: int,
|
|
) -> list[VisionReferenceImage]:
|
|
result = await db.execute(
|
|
select(VisionReferenceImage)
|
|
.where(VisionReferenceImage.task_id == task_id)
|
|
.order_by(VisionReferenceImage.acquired_at)
|
|
)
|
|
return list(result.scalars().all())
|
|
|
|
|
|
async def delete_reference_image(
|
|
db: AsyncSession, reference_id: int,
|
|
) -> VisionReferenceImage:
|
|
"""Flush the row's deletion. The caller (router) removes the file only
|
|
once the commit that makes the deletion durable has actually succeeded -
|
|
deleting it any earlier would leave the row pointing at a file that is
|
|
already gone if the commit then failed.
|
|
"""
|
|
reference = (await db.execute(
|
|
select(VisionReferenceImage).where(VisionReferenceImage.id == reference_id)
|
|
)).scalar_one_or_none()
|
|
if reference is None:
|
|
raise HTTPException(
|
|
status_code=status.HTTP_404_NOT_FOUND, detail="Reference image not found",
|
|
)
|
|
await db.delete(reference)
|
|
await db.flush()
|
|
return reference
|
|
|
|
|
|
async def preview(db: AsyncSession, task: RecipeTask, image_bytes: bytes) -> dict:
|
|
"""Run the graph and save nothing. Composing is not measuring."""
|
|
if not task.vision_json:
|
|
raise HTTPException(
|
|
status_code=status.HTTP_422_UNPROCESSABLE_CONTENT,
|
|
detail="this task carries no vision graph",
|
|
)
|
|
return await _call_worker(
|
|
image_bytes, task.vision_json, recipe_dir=task.vision_recipe_dir,
|
|
)
|