Add V1 selected area map overlay

backend/app/services/area_service.py

@@ -3,7 +3,8 @@ from __future__ import annotations
 import uuid
 
 from sqlalchemy.orm import Session
-from geoalchemy2.shape import from_shape
+from geoalchemy2.shape import from_shape, to_shape
+from shapely.geometry import mapping
 
 from app.core.errors import AppError
 from app.models import Area, Project
@@ -13,7 +14,13 @@ from app.utils.geometry import area_m2, geometry_bbox_polygon, normalize_to_mult
 
 class AreaService:
     @staticmethod
-    def list_areas(db: Session, project_id: uuid.UUID, limit: int = 50, offset: int = 0) -> tuple[list[AreaRead], int]:
+    def serialize_area(area: Area) -> dict:
+        payload = AreaRead.model_validate(area).model_dump()
+        payload["geometry"] = mapping(to_shape(area.geometry)) if area.geometry else None
+        return payload
+
+    @staticmethod
+    def list_areas(db: Session, project_id: uuid.UUID, limit: int = 50, offset: int = 0) -> tuple[list[Area], int]:
         total = db.query(Area).filter(Area.project_id == project_id).count()
         areas = (
             db.query(Area)
@@ -23,10 +30,10 @@ class AreaService:
             .limit(limit)
             .all()
         )
-        return [AreaRead.model_validate(area) for area in areas], total
+        return areas, total
 
     @staticmethod
-    def create_area(db: Session, project_id: uuid.UUID, payload: AreaCreate) -> AreaRead:
+    def create_area(db: Session, project_id: uuid.UUID, payload: AreaCreate) -> Area:
         if not db.get(Project, project_id):
             raise AppError(code="PROJECT_NOT_FOUND", message="Project not found", status_code=404)
 
@@ -46,17 +53,17 @@ class AreaService:
         db.add(area)
         db.commit()
         db.refresh(area)
-        return AreaRead.model_validate(area)
+        return area
 
     @staticmethod
-    def get_area(db: Session, area_id: uuid.UUID) -> AreaRead:
+    def get_area(db: Session, area_id: uuid.UUID) -> Area:
         area = db.get(Area, area_id)
         if not area:
             raise AppError(code="AREA_NOT_FOUND", message="Area not found", status_code=404)
-        return AreaRead.model_validate(area)
+        return area
 
     @staticmethod
-    def update_area(db: Session, area_id: uuid.UUID, payload: AreaUpdate) -> AreaRead:
+    def update_area(db: Session, area_id: uuid.UUID, payload: AreaUpdate) -> Area:
         area = db.get(Area, area_id)
         if not area:
             raise AppError(code="AREA_NOT_FOUND", message="Area not found", status_code=404)
@@ -74,4 +81,4 @@ class AreaService:
         db.add(area)
         db.commit()
         db.refresh(area)
-        return AreaRead.model_validate(area)
+        return area