feat: FASE 5b/6.1+6.2 - SPC Backend + Dashboard Metrologist (Plotly.js)
Aggiunge servizio SPC con calcoli Cp/Cpk/Pp/Ppk, carta di controllo (UCL/LCL), istogramma con curva normale. Router FastAPI con 5 endpoint statistics, blueprint Flask con proxy AJAX, dashboard interattiva Alpine.js + Plotly.js con filtri per ricetta/subtask/date, riepilogo pass/fail, gauge Cpk e i18n IT/EN completo. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Adriano
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"""Statistics router - SPC endpoints for Metrologist dashboard."""
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from datetime import datetime
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from fastapi import APIRouter, Depends, HTTPException, Query, status
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from sqlalchemy import and_, select
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from sqlalchemy.ext.asyncio import AsyncSession
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from database import get_db
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from middleware.api_key import require_metrologist
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from models.measurement import Measurement
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from models.recipe import RecipeVersion
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from models.task import RecipeSubtask, RecipeTask
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from models.user import User
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from schemas.statistics import (
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CapabilityData,
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ControlChartData,
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HistogramData,
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SummaryData,
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)
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from services.spc_service import (
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compute_capability,
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compute_control_chart,
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compute_histogram,
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compute_summary,
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)
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router = APIRouter(prefix="/api/statistics", tags=["statistics"])
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async def _query_measurements(
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db: AsyncSession,
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recipe_id: int,
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version_id: int | None = None,
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subtask_id: int | None = None,
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date_from: datetime | None = None,
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date_to: datetime | None = None,
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operator_id: int | None = None,
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lot_number: str | None = None,
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serial_number: str | None = None,
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) -> list[Measurement]:
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"""Query measurements with common filters.
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Returns list of Measurement ORM objects ordered by measured_at.
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"""
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filters = []
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# recipe_id filter via RecipeVersion subquery
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if version_id is not None:
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filters.append(Measurement.version_id == version_id)
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else:
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version_ids = select(RecipeVersion.id).where(
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RecipeVersion.recipe_id == recipe_id
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)
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filters.append(Measurement.version_id.in_(version_ids))
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if subtask_id is not None:
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filters.append(Measurement.subtask_id == subtask_id)
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if date_from is not None:
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filters.append(Measurement.measured_at >= date_from)
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if date_to is not None:
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filters.append(Measurement.measured_at <= date_to)
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if operator_id is not None:
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filters.append(Measurement.measured_by == operator_id)
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if lot_number is not None:
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filters.append(Measurement.lot_number == lot_number)
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if serial_number is not None:
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filters.append(Measurement.serial_number == serial_number)
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query = (
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select(Measurement)
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.where(and_(*filters) if filters else True)
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.order_by(Measurement.measured_at.asc())
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)
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result = await db.execute(query)
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return list(result.scalars().all())
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async def _get_subtask_tolerances(
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db: AsyncSession,
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subtask_id: int,
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) -> dict:
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"""Get tolerance limits for a specific subtask."""
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result = await db.execute(
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select(RecipeSubtask).where(RecipeSubtask.id == subtask_id)
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)
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subtask = result.scalar_one_or_none()
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if subtask is None:
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return {"utl": None, "uwl": None, "lwl": None, "ltl": None, "nominal": None}
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return {
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"utl": float(subtask.utl) if subtask.utl is not None else None,
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"uwl": float(subtask.uwl) if subtask.uwl is not None else None,
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"lwl": float(subtask.lwl) if subtask.lwl is not None else None,
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"ltl": float(subtask.ltl) if subtask.ltl is not None else None,
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"nominal": float(subtask.nominal) if subtask.nominal is not None else None,
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}
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@router.get("/summary", response_model=SummaryData)
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async def get_summary(
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recipe_id: int = Query(...),
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version_id: int | None = Query(None),
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subtask_id: int | None = Query(None),
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date_from: datetime | None = Query(None),
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date_to: datetime | None = Query(None),
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operator_id: int | None = Query(None),
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lot_number: str | None = Query(None),
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serial_number: str | None = Query(None),
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user: User = Depends(require_metrologist),
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db: AsyncSession = Depends(get_db),
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) -> SummaryData:
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"""Get pass/fail/warning summary for filtered measurements."""
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measurements = await _query_measurements(
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db, recipe_id, version_id, subtask_id,
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date_from, date_to, operator_id, lot_number, serial_number,
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)
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pass_fail_values = [m.pass_fail for m in measurements]
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return compute_summary(pass_fail_values)
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@router.get("/capability", response_model=CapabilityData)
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async def get_capability(
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recipe_id: int = Query(...),
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subtask_id: int = Query(...),
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version_id: int | None = Query(None),
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date_from: datetime | None = Query(None),
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date_to: datetime | None = Query(None),
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operator_id: int | None = Query(None),
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lot_number: str | None = Query(None),
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serial_number: str | None = Query(None),
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user: User = Depends(require_metrologist),
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db: AsyncSession = Depends(get_db),
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) -> CapabilityData:
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"""Get capability indices (Cp/Cpk/Pp/Ppk) for a specific subtask."""
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measurements = await _query_measurements(
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db, recipe_id, version_id, subtask_id,
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date_from, date_to, operator_id, lot_number, serial_number,
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)
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values = [float(m.value) for m in measurements]
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tol = await _get_subtask_tolerances(db, subtask_id)
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return compute_capability(values, tol["utl"], tol["ltl"], tol["nominal"])
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@router.get("/control-chart", response_model=ControlChartData)
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async def get_control_chart(
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recipe_id: int = Query(...),
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subtask_id: int = Query(...),
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version_id: int | None = Query(None),
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date_from: datetime | None = Query(None),
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date_to: datetime | None = Query(None),
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operator_id: int | None = Query(None),
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lot_number: str | None = Query(None),
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serial_number: str | None = Query(None),
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user: User = Depends(require_metrologist),
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db: AsyncSession = Depends(get_db),
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) -> ControlChartData:
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"""Get control chart data with UCL/LCL and OOC detection."""
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measurements = await _query_measurements(
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db, recipe_id, version_id, subtask_id,
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date_from, date_to, operator_id, lot_number, serial_number,
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)
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values = [float(m.value) for m in measurements]
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timestamps = [m.measured_at for m in measurements]
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tol = await _get_subtask_tolerances(db, subtask_id)
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return compute_control_chart(
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values, timestamps,
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tol["utl"], tol["uwl"], tol["lwl"], tol["ltl"], tol["nominal"],
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)
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@router.get("/histogram", response_model=HistogramData)
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async def get_histogram(
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recipe_id: int = Query(...),
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subtask_id: int = Query(...),
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version_id: int | None = Query(None),
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date_from: datetime | None = Query(None),
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date_to: datetime | None = Query(None),
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operator_id: int | None = Query(None),
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lot_number: str | None = Query(None),
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serial_number: str | None = Query(None),
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n_bins: int = Query(20, ge=5, le=100),
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user: User = Depends(require_metrologist),
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db: AsyncSession = Depends(get_db),
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) -> HistogramData:
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"""Get histogram data with normal curve overlay."""
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measurements = await _query_measurements(
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db, recipe_id, version_id, subtask_id,
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date_from, date_to, operator_id, lot_number, serial_number,
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)
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values = [float(m.value) for m in measurements]
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return compute_histogram(values, n_bins)
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@router.get("/subtasks")
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async def get_recipe_subtasks(
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recipe_id: int = Query(...),
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version_id: int | None = Query(None),
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user: User = Depends(require_metrologist),
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db: AsyncSession = Depends(get_db),
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) -> list[dict]:
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"""Get subtasks for a recipe (for filter dropdown).
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Returns subtask id, marker_number, description, and parent task title.
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"""
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# Get version_id: use provided or find current version
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if version_id is None:
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ver_result = await db.execute(
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select(RecipeVersion.id).where(
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RecipeVersion.recipe_id == recipe_id,
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RecipeVersion.is_current == True,
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)
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)
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version_id = ver_result.scalar_one_or_none()
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if version_id is None:
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return []
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# Get tasks and subtasks for this version
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tasks_result = await db.execute(
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select(RecipeTask).where(RecipeTask.version_id == version_id)
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.order_by(RecipeTask.order_index)
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)
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tasks = tasks_result.scalars().all()
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subtasks_list = []
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for task in tasks:
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for st in sorted(task.subtasks, key=lambda s: s.marker_number):
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subtasks_list.append({
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"id": st.id,
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"marker_number": st.marker_number,
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"description": st.description,
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"task_title": task.title,
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"nominal": float(st.nominal) if st.nominal is not None else None,
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"utl": float(st.utl) if st.utl is not None else None,
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"ltl": float(st.ltl) if st.ltl is not None else None,
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})
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return subtasks_list
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