95 lines
3.3 KiB
Python
95 lines
3.3 KiB
Python
from __future__ import annotations
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import uuid
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from sqlalchemy.orm import Session
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from geoalchemy2.shape import from_shape, to_shape
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from shapely.geometry import mapping
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from app.core.errors import AppError
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from app.models import Area, Project
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from app.schemas.area import AreaCreate, AreaRead, AreaUpdate
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from app.utils.geometry import area_m2, geometry_bbox_polygon, normalize_to_multipolygon
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class AreaService:
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@staticmethod
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def serialize_area(area: Area) -> dict:
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geometry = to_shape(area.geometry) if area.geometry else None
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return AreaRead.model_validate(
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{
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"id": area.id,
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"project_id": area.project_id,
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"name": area.name,
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"original_crs": area.original_crs,
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"area_m2": area.area_m2,
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"created_at": area.created_at,
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"geometry_type": geometry.geom_type if geometry else None,
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"geometry": mapping(geometry) if geometry else None,
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}
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).model_dump()
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@staticmethod
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def list_areas(db: Session, project_id: uuid.UUID, limit: int = 50, offset: int = 0) -> tuple[list[Area], int]:
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total = db.query(Area).filter(Area.project_id == project_id).count()
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areas = (
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db.query(Area)
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.filter(Area.project_id == project_id)
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.order_by(Area.created_at.desc())
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.offset(offset)
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.limit(limit)
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.all()
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)
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return areas, total
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@staticmethod
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def create_area(db: Session, project_id: uuid.UUID, payload: AreaCreate) -> Area:
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if not db.get(Project, project_id):
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raise AppError(code="PROJECT_NOT_FOUND", message="Project not found", status_code=404)
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try:
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multipolygon = normalize_to_multipolygon(payload.geometry)
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except ValueError as exc:
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raise AppError(code="INVALID_GEOMETRY", message=str(exc), status_code=400) from exc
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area = Area(
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project_id=project_id,
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name=payload.name.strip() or "Unnamed area",
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geometry=from_shape(multipolygon, srid=4326),
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original_crs=payload.crs or "EPSG:4326",
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area_m2=area_m2(multipolygon),
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bbox=from_shape(geometry_bbox_polygon(multipolygon), srid=4326),
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)
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db.add(area)
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db.commit()
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db.refresh(area)
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return area
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@staticmethod
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def get_area(db: Session, area_id: uuid.UUID) -> Area:
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area = db.get(Area, area_id)
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if not area:
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raise AppError(code="AREA_NOT_FOUND", message="Area not found", status_code=404)
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return area
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@staticmethod
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def update_area(db: Session, area_id: uuid.UUID, payload: AreaUpdate) -> Area:
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area = db.get(Area, area_id)
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if not area:
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raise AppError(code="AREA_NOT_FOUND", message="Area not found", status_code=404)
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changed = False
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if payload.name:
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area.name = payload.name.strip() or area.name
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changed = True
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if payload.crs:
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area.original_crs = payload.crs
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changed = True
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if not changed:
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raise AppError(code="NO_CHANGES", message="No updatable fields provided", status_code=422)
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db.add(area)
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db.commit()
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db.refresh(area)
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return area
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