import { isNotEmptyObject } from "../../is"
import { getObjectValue } from "./getObjectValue"
import { objectEach } from "./objectEach"
import { setObjectValue } from "./setObjectValue"

/**
 * 根据 Mask 对象，裁剪源对象，只有 Mask 对象中有的键才会被保留下来
 * @param srcOb 待裁剪对象
 * @param maskOb Mask 对象
 */
export function objectMask(srcOb: any, maskOb: any, options?: {}) {
    let newOb: any = {}
    objectEach(
        maskOb,
        (value, key, { keyPath }) => {
            let srcValue = getObjectValue(srcOb, <any>keyPath)
            if (isNotEmptyObject(value)) return
            if (srcValue !== undefined) {
                setObjectValue(newOb, <any>keyPath, srcValue, true)
            }
        },
        { needKeyPath: true }
    )
    return newOb
}