96 lines
2.1 KiB
JavaScript
96 lines
2.1 KiB
JavaScript
'use strict';
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import utils from '../utils.js';
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/**
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* It takes a string like `foo[x][y][z]` and returns an array like `['foo', 'x', 'y', 'z']
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*
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* @param {string} name - The name of the property to get.
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*
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* @returns An array of strings.
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*/
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function parsePropPath(name) {
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// foo[x][y][z]
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// foo.x.y.z
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// foo-x-y-z
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// foo x y z
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return utils.matchAll(/\w+|\[(\w*)]/g, name).map(match => {
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return match[0] === '[]' ? '' : match[1] || match[0];
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});
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}
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/**
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* Convert an array to an object.
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*
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* @param {Array<any>} arr - The array to convert to an object.
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*
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* @returns An object with the same keys and values as the array.
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*/
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function arrayToObject(arr) {
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const obj = {};
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const keys = Object.keys(arr);
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let i;
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const len = keys.length;
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let key;
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for (i = 0; i < len; i++) {
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key = keys[i];
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obj[key] = arr[key];
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}
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return obj;
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}
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/**
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* It takes a FormData object and returns a JavaScript object
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*
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* @param {string} formData The FormData object to convert to JSON.
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*
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* @returns {Object<string, any> | null} The converted object.
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*/
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function formDataToJSON(formData) {
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function buildPath(path, value, target, index) {
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let name = path[index++];
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if (name === '__proto__') return true;
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const isNumericKey = Number.isFinite(+name);
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const isLast = index >= path.length;
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name = !name && utils.isArray(target) ? target.length : name;
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if (isLast) {
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if (utils.hasOwnProp(target, name)) {
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target[name] = [target[name], value];
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} else {
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target[name] = value;
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}
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return !isNumericKey;
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}
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if (!target[name] || !utils.isObject(target[name])) {
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target[name] = [];
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}
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const result = buildPath(path, value, target[name], index);
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if (result && utils.isArray(target[name])) {
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target[name] = arrayToObject(target[name]);
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}
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return !isNumericKey;
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}
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if (utils.isFormData(formData) && utils.isFunction(formData.entries)) {
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const obj = {};
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utils.forEachEntry(formData, (name, value) => {
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buildPath(parsePropPath(name), value, obj, 0);
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});
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return obj;
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}
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return null;
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}
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export default formDataToJSON;
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