object-hierarchy-access/built/select.js

Get/Set value from/to JS object hierarchy properties

import { getPropNames, cloneContainer } from './utility/common';
import { normalizeDescriptor, getMappedNameValue } from './utility/select';
function generate(current, result, hierarchies, index) {
    const descriptor = normalizeDescriptor(hierarchies[index]);
    const names = getPropNames(current, descriptor);
    const lastIndex = hierarchies.length - 1;
    names.forEach(name => {
        if (name in current) {
            const { mappedName, mappedValue } = getMappedNameValue(current, name, descriptor);
            if (index < lastIndex) {
                result[mappedName] = cloneContainer(mappedValue);
            }
            else {
                result[mappedName] = mappedValue;
            }
            if (index < lastIndex && typeof mappedValue === 'object' && mappedValue !== null) {
                generate(mappedValue, result[mappedName], hierarchies, index + 1);
            }
        }
    });
}
function select(target, ...hierarchyProps) {
    let result;
    const current = target;
    if (current !== undefined && current !== null) {
        result = cloneContainer(current);
        generate(current, result, hierarchyProps, 0);
    }
    return result;
}
export { select };