|
|
'use strict';
|
|
|
var isObj = require('is-obj');
|
|
|
|
|
|
module.exports.get = function (obj, path) {
|
|
|
if (!isObj(obj) || typeof path !== 'string') {
|
|
|
return obj;
|
|
|
}
|
|
|
|
|
|
var pathArr = getPathSegments(path);
|
|
|
|
|
|
for (var i = 0; i < pathArr.length; i++) {
|
|
|
var descriptor = Object.getOwnPropertyDescriptor(obj, pathArr[i]) || Object.getOwnPropertyDescriptor(Object.prototype, pathArr[i]);
|
|
|
if (descriptor && !descriptor.enumerable) {
|
|
|
return;
|
|
|
}
|
|
|
|
|
|
obj = obj[pathArr[i]];
|
|
|
|
|
|
if (obj === undefined || obj === null) {
|
|
|
// `obj` is either `undefined` or `null` so we want to stop the loop, and
|
|
|
// if this is not the last bit of the path, and
|
|
|
// if it did't return `undefined`
|
|
|
// it would return `null` if `obj` is `null`
|
|
|
// but we want `get({foo: null}, 'foo.bar')` to equal `undefined` not `null`
|
|
|
if (i !== pathArr.length - 1) {
|
|
|
return undefined;
|
|
|
}
|
|
|
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
|
|
|
return obj;
|
|
|
};
|
|
|
|
|
|
module.exports.set = function (obj, path, value) {
|
|
|
if (!isObj(obj) || typeof path !== 'string') {
|
|
|
return;
|
|
|
}
|
|
|
|
|
|
var pathArr = getPathSegments(path);
|
|
|
|
|
|
for (var i = 0; i < pathArr.length; i++) {
|
|
|
var p = pathArr[i];
|
|
|
|
|
|
if (!isObj(obj[p])) {
|
|
|
obj[p] = {};
|
|
|
}
|
|
|
|
|
|
if (i === pathArr.length - 1) {
|
|
|
obj[p] = value;
|
|
|
}
|
|
|
|
|
|
obj = obj[p];
|
|
|
}
|
|
|
};
|
|
|
|
|
|
module.exports.delete = function (obj, path) {
|
|
|
if (!isObj(obj) || typeof path !== 'string') {
|
|
|
return;
|
|
|
}
|
|
|
|
|
|
var pathArr = getPathSegments(path);
|
|
|
|
|
|
for (var i = 0; i < pathArr.length; i++) {
|
|
|
var p = pathArr[i];
|
|
|
|
|
|
if (i === pathArr.length - 1) {
|
|
|
delete obj[p];
|
|
|
return;
|
|
|
}
|
|
|
|
|
|
obj = obj[p];
|
|
|
}
|
|
|
};
|
|
|
|
|
|
module.exports.has = function (obj, path) {
|
|
|
if (!isObj(obj) || typeof path !== 'string') {
|
|
|
return false;
|
|
|
}
|
|
|
|
|
|
var pathArr = getPathSegments(path);
|
|
|
|
|
|
for (var i = 0; i < pathArr.length; i++) {
|
|
|
obj = obj[pathArr[i]];
|
|
|
|
|
|
if (obj === undefined) {
|
|
|
return false;
|
|
|
}
|
|
|
}
|
|
|
|
|
|
return true;
|
|
|
};
|
|
|
|
|
|
function getPathSegments(path) {
|
|
|
var pathArr = path.split('.');
|
|
|
var parts = [];
|
|
|
|
|
|
for (var i = 0; i < pathArr.length; i++) {
|
|
|
var p = pathArr[i];
|
|
|
|
|
|
while (p[p.length - 1] === '\\' && pathArr[i + 1] !== undefined) {
|
|
|
p = p.slice(0, -1) + '.';
|
|
|
p += pathArr[++i];
|
|
|
}
|
|
|
|
|
|
parts.push(p);
|
|
|
}
|
|
|
|
|
|
return parts;
|
|
|
}
|