/**
 * Sample Function to capture fingerprint from RDService based biometric device in the browser (using JQuery).
 *
 * @param {string} capture_url RDService URL to call for capture. Eg: http://127.0.0.1:11100/capture or http://127.0.0.1:11100/rd/capture
 * @param {function} callbackFunction The function to call back on capture success or failure
 *
 * @return {Object} response Object containing the response details.
 * @return {boolean} response.httpSuccess Whether AJAX request successful.
 * @return {boolean} response.captureSuccess Whether fingerprint capturing successful.
 * @return {number} response.captureQuality Quality of fingerprint scan if captureSuccess is true.
 * @return {number} response.errCode Error code returned by RDService if captureSuccess is false.
 * @return {string} response.errInfo Error details returned by RDService if captureSuccess is false.
 * @return {string} response.textStatus HTTP status if httpSuccess is false.
 * @return {string} response.errorThrown Error details if httpSuccess is false.
 */
function capturefingerprint(capture_url, callbackFunction) {

	var doc = document.implementation.createDocument("", "", null);
	var pidOptionsElem = doc.createElement("PidOptions");
	var optsElem = doc.createElement("Opts");

	optsElem.setAttribute("fCount", 1);
	optsElem.setAttribute("fType", 2);
	optsElem.setAttribute("iCount", 0);
	optsElem.setAttribute("pCount", 0);
	optsElem.setAttribute("format", 0);
	optsElem.setAttribute("pidVer", "2.0");
	optsElem.setAttribute("timeout", 10000);
	optsElem.setAttribute("posh", "UNKNOWN");
	optsElem.setAttribute("env", "P");
  optsElem.setAttribute("wadh", "E0jzJ/P8UopUHAieZn8CKqS4WPMi5ZSYXgfnlfkWjrc=");

	pidOptionsElem.appendChild(optsElem);
	doc.appendChild(pidOptionsElem);

	$.ajax({
		url: capture_url,
		type: 'CAPTURE',
		data: doc,
		processData: false,
		success: function (response) {
			var doc2;
			var result = {
				httpSuccess: true
			};

			if (typeof response === 'string') {
				doc2 = (new DOMParser()).parseFromString(response, 'text/xml');
				result.pid_data = response;
			} else {
				doc2 = response;
				result.pid_data = (new XMLSerializer()).serializeToString(response);
			}

			var resp = doc2.getElementsByTagName("Resp");
			result.errCode = resp[0].getAttribute('errCode');

			if (errCode != 0) {
				result.captureSuccess = false;
				result.errInfo = resp[0].getAttribute('errInfo');
			} else {
				result.captureSuccess = true;
				result.captureQuality = parseInt(resp[0].getAttribute('qScore'));
			}

			callbackFunction(result);
		},

		error: function (jqXHR, textStatus, errorThrown) {
			callbackFunction({
				httpSuccess: false,
				captureSuccess: false,
				textStatus: textStatus,
				errorThrown: errorThrown
			});
		}
	});
}