import defined from './defined.js';
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import DeveloperError from './DeveloperError.js';
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/**
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* Parses a query string into an object, where the keys and values of the object are the
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* name/value pairs from the query string, decoded. If a name appears multiple times,
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* the value in the object will be an array of values.
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* @exports queryToObject
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*
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* @param {String} queryString The query string.
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* @returns {Object} An object containing the parameters parsed from the query string.
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*
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*
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* @example
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* var obj = Cesium.queryToObject('key1=some%20value&key2=a%2Fb&key3=x&key3=y');
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* // obj will be:
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* // {
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* // key1 : 'some value',
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* // key2 : 'a/b',
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* // key3 : ['x', 'y']
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* // }
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*
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* @see objectToQuery
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*/
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function queryToObject(queryString) {
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//>>includeStart('debug', pragmas.debug);
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if (!defined(queryString)) {
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throw new DeveloperError('queryString is required.');
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}
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//>>includeEnd('debug');
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var result = {};
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if (queryString === '') {
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return result;
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}
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var parts = queryString.replace(/\+/g, '%20').split(/[&;]/);
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for (var i = 0, len = parts.length; i < len; ++i) {
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var subparts = parts[i].split('=');
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var name = decodeURIComponent(subparts[0]);
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var value = subparts[1];
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if (defined(value)) {
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value = decodeURIComponent(value);
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} else {
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value = '';
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}
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var resultValue = result[name];
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if (typeof resultValue === 'string') {
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// expand the single value to an array
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result[name] = [resultValue, value];
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} else if (Array.isArray(resultValue)) {
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resultValue.push(value);
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} else {
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result[name] = value;
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}
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}
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return result;
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}
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export default queryToObject;
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