typeparse
Version:
Runtime object transformation, parsing and validation with inferred static TypeScript typing.
35 lines (34 loc) • 1.53 kB
JavaScript
;
/*---------------------------------------------------------------------------------------------
* Copyright (c) Kenneth Herrera. All rights reserved.
* Licensed under the MIT License. See LICENSE in the project root for license information.
*--------------------------------------------------------------------------------------------*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.get = void 0;
const INDEX_SYNTAX_RE = /^\[(-?\d+)\]$|^((?!\\\[).+)|\\(.+)$/;
function accessPath(input, path) {
var _a, _b;
const key = path.shift();
if (key === undefined)
return input;
if (!input)
return undefined;
if (typeof input !== "object")
return undefined;
const match = INDEX_SYNTAX_RE.exec(key);
const arrayKey = (match === null || match === void 0 ? void 0 : match[1]) ? Number.parseInt(match[1]) : undefined;
if (arrayKey !== undefined) {
if (!Array.isArray(input))
return undefined;
if (arrayKey < 0)
return accessPath(input[input.length + arrayKey], path);
return accessPath(input[arrayKey], path);
}
return accessPath(input[(_b = (_a = match === null || match === void 0 ? void 0 : match[2]) !== null && _a !== void 0 ? _a : match === null || match === void 0 ? void 0 : match[3]) !== null && _b !== void 0 ? _b : ""], path);
}
function get(input, path) {
if (path === undefined)
return input;
return accessPath(input, path.split("."));
}
exports.get = get;