object-hierarchy-access/src/get.ts

Get/Set value from/to JS object hierarchy properties

import {PropName, GetNameCallback, IGotPropDescriptor} from './type';
import {normalizeDescriptor} from 'utility/get';
import {getPropName} from 'utility/common';

function get(target: any, ...rest: any[]) {
	const hierarchies: Array<PropName | GetNameCallback | IGotPropDescriptor> = Array.prototype.concat.apply([], rest);
	let current = target;
	if (current !== undefined && current !== null) {
		hierarchies.every(info => {
			const descriptor = normalizeDescriptor(info);
			const {got} = descriptor;
			const name = getPropName(current, descriptor);

			const parent = current;
			current = current[name];
			if (got) {
				got.call(parent, parent, name, current);
			}
			return current;
		});
	}

	return current;
}

export {
	get
};