Merge pull request #781 from hotosm/feat-ConfigFile

api to download data extracts

src/backend/app/projects/project_crud.py

@@ -1496,6 +1496,30 @@ def get_task_geometry(db: Session, project_id: int):
     return json.dumps(feature_collection)
 
 
+async def get_project_features_geojson(db:Session, project_id:int):
+
+    # Get the geojson of those features for this task.
+    query = f"""SELECT jsonb_build_object(
+                'type', 'FeatureCollection',
+                'features', jsonb_agg(feature)
+                )
+                FROM (
+                SELECT jsonb_build_object(
+                    'type', 'Feature',
+                    'id', id,
+                    'geometry', ST_AsGeoJSON(geometry)::jsonb,
+                    'properties', properties
+                ) AS feature
+                FROM features
+                WHERE project_id={project_id}
+                ) features;
+            """
+
+    result = db.execute(query)
+    features = result.fetchone()[0]
+    return features
+
+
 def create_task_grid(db: Session, project_id: int, delta: int):
     try:
         # Query DB for project AOI

src/backend/app/projects/project_routes.py

@@ -64,7 +64,7 @@ async def read_projects(
     return projects
 
 
-@router.get("/{project_id}/")
+@router.get("/project_details/{project_id}/")
 async def get_projet_details(project_id: int, db: Session = Depends(database.get_db)):
     """Returns the project details.
 
@@ -920,6 +920,30 @@ async def download_task_boundaries(
     return Response(content=out, headers=headers)
 
 
+@router.get("/features/download/")
+async def download_features(
+    project_id: int,
+    db: Session = Depends(database.get_db)
+):
+    """Downloads the features of a project as a GeoJSON file.
+    
+        Args:
+            project_id (int): The id of the project.
+    
+        Returns:
+            Response: The HTTP response object containing the downloaded file.
+    """
+
+    out = await project_crud.get_project_features_geojson(db, project_id)
+
+    headers = {
+        "Content-Disposition": "attachment; filename=project_features.geojson",
+        "Content-Type": "application/media",
+    }
+
+    return Response(content=json.dumps(out), headers=headers)
+
+
 @router.get("/tiles/{project_id}")
 async def generate_project_tiles(
     background_tasks: BackgroundTasks,