forked from axios/axios
/
formDataToJSON.js
71 lines (56 loc) · 1.5 KB
/
formDataToJSON.js
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'use strict';
var utils = require('../utils');
function parsePropPath(name) {
// foo[x][y][z]
// foo.x.y.z
// foo-x-y-z
// foo x y z
return utils.matchAll(/\w+|\[(\w*)]/g, name).map(function(match) {
return match[0] === '[]' ? '' : match[1] || match[0];
});
}
function arrayToObject(arr) {
var obj = {};
var keys = Object.keys(arr);
var i;
var len = keys.length;
var key;
for (i = 0; i < len; i++) {
key = keys[i];
obj[key] = arr[key];
}
return obj;
}
function formDataToJSON(formData) {
function buildPath(path, value, target, index) {
var name = path[index++];
var isNumericKey = Number.isFinite(+name);
var isLast = index >= path.length;
name = !name && utils.isArray(target) ? target.length : name;
if (isLast) {
if (utils.hasOwnProperty(target, name)) {
target[name] = [target[name], value];
} else {
target[name] = value;
}
return !isNumericKey;
}
if (!target[name] || !utils.isObject(target[name])) {
target[name] = [];
}
var result = buildPath(path, value, target[name], index);
if (result && utils.isArray(target[name])) {
target[name] = arrayToObject(target[name]);
}
return !isNumericKey;
}
if (utils.isFormData(formData) && utils.isFunction(formData.entries)) {
var obj = {};
utils.forEachEntry(formData, function(name, value) {
buildPath(parsePropPath(name), value, obj, 0);
});
return obj;
}
return null;
}
module.exports = formDataToJSON;