157 lines
3.8 KiB
JavaScript
Executable File
157 lines
3.8 KiB
JavaScript
Executable File
// Load modules
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var Utils = require('./utils');
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// Declare internals
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var internals = {
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delimiter: '&',
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depth: 5,
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arrayLimit: 20,
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parameterLimit: 1000
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};
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internals.parseValues = function (str, options) {
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var obj = {};
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var parts = str.split(options.delimiter, options.parameterLimit === Infinity ? undefined : options.parameterLimit);
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for (var i = 0, il = parts.length; i < il; ++i) {
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var part = parts[i];
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var pos = part.indexOf(']=') === -1 ? part.indexOf('=') : part.indexOf(']=') + 1;
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if (pos === -1) {
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obj[Utils.decode(part)] = '';
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}
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else {
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var key = Utils.decode(part.slice(0, pos));
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var val = Utils.decode(part.slice(pos + 1));
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if (!obj.hasOwnProperty(key)) {
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obj[key] = val;
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}
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else {
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obj[key] = [].concat(obj[key]).concat(val);
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}
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}
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}
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return obj;
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};
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internals.parseObject = function (chain, val, options) {
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if (!chain.length) {
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return val;
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}
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var root = chain.shift();
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var obj = {};
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if (root === '[]') {
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obj = [];
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obj = obj.concat(internals.parseObject(chain, val, options));
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}
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else {
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var cleanRoot = root[0] === '[' && root[root.length - 1] === ']' ? root.slice(1, root.length - 1) : root;
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var index = parseInt(cleanRoot, 10);
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var indexString = '' + index;
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if (!isNaN(index) &&
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root !== cleanRoot &&
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indexString === cleanRoot &&
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index <= options.arrayLimit) {
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obj = [];
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obj[index] = internals.parseObject(chain, val, options);
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}
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else {
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obj[cleanRoot] = internals.parseObject(chain, val, options);
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}
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}
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return obj;
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};
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internals.parseKeys = function (key, val, options) {
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if (!key) {
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return;
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}
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// The regex chunks
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var parent = /^([^\[\]]*)/;
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var child = /(\[[^\[\]]*\])/g;
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// Get the parent
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var segment = parent.exec(key);
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// Don't allow them to overwrite object prototype properties
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if (Object.prototype.hasOwnProperty(segment[1])) {
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return;
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}
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// Stash the parent if it exists
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var keys = [];
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if (segment[1]) {
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keys.push(segment[1]);
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}
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// Loop through children appending to the array until we hit depth
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var i = 0;
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while ((segment = child.exec(key)) !== null && i < options.depth) {
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++i;
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if (!Object.prototype.hasOwnProperty(segment[1].replace(/\[|\]/g, ''))) {
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keys.push(segment[1]);
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}
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}
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// If there's a remainder, just add whatever is left
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if (segment) {
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keys.push('[' + key.slice(segment.index) + ']');
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}
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return internals.parseObject(keys, val, options);
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};
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module.exports = function (str, options) {
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if (str === '' ||
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str === null ||
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typeof str === 'undefined') {
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return {};
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}
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options = options || {};
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options.delimiter = typeof options.delimiter === 'string' || Utils.isRegExp(options.delimiter) ? options.delimiter : internals.delimiter;
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options.depth = typeof options.depth === 'number' ? options.depth : internals.depth;
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options.arrayLimit = typeof options.arrayLimit === 'number' ? options.arrayLimit : internals.arrayLimit;
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options.parameterLimit = typeof options.parameterLimit === 'number' ? options.parameterLimit : internals.parameterLimit;
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var tempObj = typeof str === 'string' ? internals.parseValues(str, options) : str;
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var obj = {};
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// Iterate over the keys and setup the new object
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var keys = Object.keys(tempObj);
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for (var i = 0, il = keys.length; i < il; ++i) {
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var key = keys[i];
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var newObj = internals.parseKeys(key, tempObj[key], options);
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obj = Utils.merge(obj, newObj);
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}
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return Utils.compact(obj);
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};
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