Function persistenceMods

dash/dash-renderer/src/persistence.js:395–454

(layout, component, path, dispatch)

}

function persistenceMods(layout, component, path, dispatch) {
    const {
        canPersist,
        id,
        props,
        element,
        persistence,
        persisted_props,
        persistence_type
    } = getProps(component);

    let layoutOut = layout;
    if (canPersist && persistence) {
        const storage = getStore(persistence_type, dispatch);
        const update = {};
        forEach(
            persistedProp =>
                modProp(
                    getValsKey(id, persistedProp, persistence),
                    storage,
                    element,
                    props,
                    persistedProp,
                    update
                ),
            persisted_props
        );

        for (const propName in update) {
            layoutOut = set(
                lensPath(path.concat('props', propName)),
                update[propName],
                layoutOut
            );
        }
    }

    // recurse inward
    const {children} = props;
    if (Array.isArray(children)) {
        children.forEach((child, i) => {
            if (type(child) === 'Object' && child.props) {
                layoutOut = persistenceMods(
                    layoutOut,
                    child,
                    path.concat('props', 'children', i),
                    dispatch
                );
            }
        });
    } else if (type(children) === 'Object' && children.props) {
        layoutOut = persistenceMods(
            layoutOut,
            children,
            path.concat('props', 'children'),
            dispatch
        );
    }