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66 lines
1.2 KiB
JavaScript
66 lines
1.2 KiB
JavaScript
10 months ago
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'use strict';
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/**
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* Simplified lodash.get to work around the annoying null quirk. See:
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* https://github.com/lodash/lodash/issues/3659
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* @api private
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*/
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module.exports = function get(obj, path, def) {
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let parts;
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let isPathArray = false;
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if (typeof path === 'string') {
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if (path.indexOf('.') === -1) {
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const _v = getProperty(obj, path);
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if (_v == null) {
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return def;
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}
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return _v;
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}
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parts = path.split('.');
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} else {
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isPathArray = true;
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parts = path;
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if (parts.length === 1) {
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const _v = getProperty(obj, parts[0]);
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if (_v == null) {
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return def;
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}
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return _v;
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}
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}
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let rest = path;
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let cur = obj;
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for (const part of parts) {
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if (cur == null) {
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return def;
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}
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// `lib/cast.js` depends on being able to get dotted paths in updates,
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// like `{ $set: { 'a.b': 42 } }`
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if (!isPathArray && cur[rest] != null) {
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return cur[rest];
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}
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cur = getProperty(cur, part);
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if (!isPathArray) {
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rest = rest.substr(part.length + 1);
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}
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}
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return cur == null ? def : cur;
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};
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function getProperty(obj, prop) {
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if (obj == null) {
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return obj;
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}
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if (obj instanceof Map) {
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return obj.get(prop);
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}
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return obj[prop];
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}
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