Microdata util for CasperJS

casper.fetchMicrodata.js

//microdata polyfill (see https://github.com/termi/Microdata-JS)
casper.options.clientScripts.push("../../../support/a.js");
casper.options.clientScripts.push("../../../support/microdata-js.js");

/**
 * Fetches microdata from the remote DOM environment, in a json object structure.
 * @param itemType The item type of item scopes to fetch data for
 * @returns {Object|mixed}
 */
casper.fetchMicrodata = function(itemType) {
	"use strict";

	return casper.evaluate(function(itemType) {

		//this function is adapted from https://github.com/abernier/microdatajs/blob/master/jquery.microdata.json.js
		var getMicrodata = function(itemType) {

			function getObject(item, memory) {
				var result = {};
				result.type = item.itemType;
				result.id = item.itemId;
				result.properties = {};
				[].slice.call(item.properties).forEach(function (elem) {
					var value;
					if (elem.itemScope) {
						if (memory.indexOf(elem) > -1) {
							memory.push(item);
							value = getObject(elem, memory);
							memory.pop();
						}
					} else {
						value = elem.itemValue;
					}
					[].slice.call(elem.itemProp).forEach(function (prop) {
						result.properties[prop] = result.properties[prop] || [];
						result.properties[prop].push(value);
					});
				});
				return result;
			}

			var result = {};
			result.items = [];
			var items = document.getItems(itemType);
			[].slice.call(items).forEach(function (item) {
				result.items.push(getObject(item, []));
			});
			return result;
		};

		return getMicrodata(itemType);
	}, itemType);
};