Revision history: change sets + revisions + revert — the undo substrate (#48) (#61)

Co-authored-by: Steve Dudenhoeffer <[email protected]>

internal/store/objects.go

@@ -61,6 +61,33 @@ func (d *DB) CreateObject(ctx context.Context, o *domain.GardenObject) (*domain.
 	return created, nil
 }
 
+// RestoreObject re-inserts a deleted object under its ORIGINAL id, preserving
+// version and timestamps — the inverse of a delete, for reverting a change set
+// (#48). SQLite allows an explicit INTEGER PRIMARY KEY insert once the row is
+// gone; if the id has been taken again the insert fails on the primary key, which
+// is the correct outcome (the service checks first and reports a conflict).
+//
+// Deliberately not routed through objectInsert: that omits id/version/timestamps
+// because a normal create must let the database assign them.
+func (d *DB) RestoreObject(ctx context.Context, o *domain.GardenObject) (*domain.GardenObject, error) {
+	restored, err := scanObject(d.sql.QueryRowContext(ctx,
+		`INSERT INTO garden_objects
+		   (id, garden_id, kind, name, shape, points, x_cm, y_cm, width_cm, height_cm,
+		    rotation_deg, z_index, plantable, color, props, grid_size_cm, snap_to_grid, notes,
+		    version, created_at, updated_at)
+		 VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?,
+		         strftime('%Y-%m-%dT%H:%M:%SZ', 'now'))
+		 RETURNING `+objectColumns,
+		o.ID, o.GardenID, o.Kind, o.Name, o.Shape, o.Points, o.XCM, o.YCM, o.WidthCM, o.HeightCM,
+		o.RotationDeg, o.ZIndex, boolToInt(o.Plantable), o.Color, o.Props,
+		o.GridSizeCM, boolToInt(o.SnapToGrid), o.Notes, o.Version, o.CreatedAt,
+	))
+	if err != nil {
+		return nil, fmt.Errorf("store: restore object: %w", err)
+	}
+	return restored, nil
+}
+
 // GetObject returns the object with the given id, or domain.ErrNotFound.
 func (d *DB) GetObject(ctx context.Context, id int64) (*domain.GardenObject, error) {
 	o, err := scanObject(d.sql.QueryRowContext(ctx,