@visactor/vmind/esm/utils/set.js

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import { isArray, isObject, isValid, merge } from "@visactor/vutils";

export function set(object, path, value) {
    return null == object ? object : baseSet(object, path, value);
}

export function deleteByPath(object, path) {
    return null == object ? object : baseDelete(object, path);
}

function castPath(path, object) {
    if (object[path]) return [ path ];
    const arr = [];
    return path.split(".").forEach((entry => {
        const res = /\[(\d)\]/g.exec(entry);
        res ? (arr.push(entry.replace(res[0], "")), arr.push(res[1])) : arr.push(entry);
    })), arr;
}

function isIndex(key) {
    return /\d/.exec(key);
}

function baseSet(object, pathString, value) {
    if (!isObject(object)) return object;
    const path = castPath(pathString, object);
    let index = -1;
    const length = path.length, lastIndex = length - 1;
    let nested = object;
    for (;null != nested && ++index < length; ) {
        const key = path[index];
        let newValue = value;
        if (index !== lastIndex) {
            const objValue = nested[key];
            newValue = isValid(objValue) ? objValue : isIndex(path[index + 1]) ? [] : {};
        }
        isValid(nested[key]) ? merge(nested, {
            [key]: newValue
        }) : nested[key] = newValue, nested = nested[key];
    }
    return object;
}

function baseDelete(object, pathString) {
    if (!isObject(object)) return object;
    const path = castPath(pathString, object);
    let index = -1;
    const length = path.length, lastIndex = length - 1;
    let nested = object;
    for (;null != nested && ++index < length; ) {
        const key = path[index];
        key in nested && (index === lastIndex ? isArray(nested) ? nested.splice(Number(key), 1) : delete nested[key] : nested = nested[key]);
    }
    return object;
}
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