fix: Fix geometry parsing

internal/service/dataset.go

@@ -33,7 +33,7 @@ type DatasetRepository interface {
 	MarkParseFailed(ctx context.Context, id uuid.UUID, reason string) error
 	MarkReady(ctx context.Context, id uuid.UUID) error
 	MarkConverted(ctx context.Context, id uuid.UUID, cogKey string, footprint []byte) error
-	SetProperties(ctx context.Context, id uuid.UUID, properties []byte) error
+	SetProperties(ctx context.Context, id uuid.UUID, properties, geometry []byte) error
 	SaveMapping(ctx context.Context, id uuid.UUID, katoColumn string, years []domain.YearColumn) (domain.Dataset, error)
 	ReplaceObservations(ctx context.Context, datasetID uuid.UUID, obs []domain.Observation) error
 	ListObservations(ctx context.Context, datasetID uuid.UUID, katoCode *string, limit, offset int) ([]domain.Observation, error)
@@ -82,11 +82,15 @@ type ColumnParser func(filename string, data []byte) ([]domain.AttributeColumn,
 // RowParser reads every attribute row from a file's raw bytes as name->value maps.
 type RowParser func(filename string, data []byte) ([]map[string]string, error)
 
-// RasterConverter converts a raster file to a Cloud-Optimized GeoTIFF and reads
-// its footprint. It operates on local file paths.
+// RasterConverter converts a raster file to a Cloud-Optimized GeoTIFF, reads its
+// footprint, and dissolves a vector file's features into a single geometry. It
+// operates on local file paths.
 type RasterConverter interface {
 	ToCOG(ctx context.Context, srcPath, dstPath string) error
 	Footprint(ctx context.Context, srcPath string) ([]byte, error)
+	// VectorGeometry returns the combined geometry of a vector file's features as
+	// GeoJSON in EPSG:4326 (nil if the file has no features).
+	VectorGeometry(ctx context.Context, srcPath string) ([]byte, error)
 }
 
 // UploadInput carries everything needed to store a new dataset.
@@ -249,10 +253,12 @@ func (s *DatasetService) Reprocess(ctx context.Context, id uuid.UUID) (domain.Da
 	return dataset, nil
 }
 
-// ExtractProperties reads a plain vector dataset's attribute table and stores it
-// (as a JSON array of row objects) in the properties column, then marks the
-// dataset ready. Invoked by the worker. Parse failures are recorded; storage
-// failures are returned for retry.
+// ExtractProperties reads a plain vector dataset's attribute table and spatial
+// geometry and stores them (the attribute table as a JSON array of row objects
+// in the properties column, the dissolved feature geometry in the geometry
+// column), then marks the dataset ready. Invoked by the worker. Parse failures
+// are recorded; storage failures are returned for retry. Geometry extraction is
+// best-effort: a failure leaves geometry unset rather than failing the job.
 func (s *DatasetService) ExtractProperties(ctx context.Context, id uuid.UUID) error {
 	dataset, err := s.repo.GetByID(ctx, id)
 	if err != nil {
@@ -278,7 +284,31 @@ func (s *DatasetService) ExtractProperties(ctx context.Context, id uuid.UUID) er
 			return err
 		}
 	}
-	return s.repo.SetProperties(ctx, id, properties)
+
+	geometry := s.vectorGeometry(ctx, dataset.Filename, data)
+	return s.repo.SetProperties(ctx, id, properties, geometry)
+}
+
+// vectorGeometry dissolves a vector file's features into a single GeoJSON
+// geometry via the converter. It writes the in-memory bytes to a temp file
+// (preserving the extension so the converter detects the format) because the
+// converter operates on file paths. Best-effort: any failure yields nil.
+func (s *DatasetService) vectorGeometry(ctx context.Context, filename string, data []byte) []byte {
+	ext := strings.ToLower(filepath.Ext(filename))
+	f, err := os.CreateTemp("", "gis-vec-*"+ext)
+	if err != nil {
+		return nil
+	}
+	defer os.Remove(f.Name())
+	if _, err := f.Write(data); err != nil {
+		f.Close()
+		return nil
+	}
+	if err := f.Close(); err != nil {
+		return nil
+	}
+	geom, _ := s.converter.VectorGeometry(ctx, f.Name())
+	return geom
 }
 
 // hasAttributeData reports whether any row carries at least one attribute.