/*
 * JavaScript functions for Survey123
 */

function getStopRef(token, Saltmarsh) {


	var fl ='https://services1.arcgis.com/JZM7qJpmv7vJ0Hzx/arcgis/rest/services/service_3b489c8953284269a01cd2b0b474f882/FeatureServer/0';

	var field = "stop_reference";
	var secondField = "Saltmarsh"

	var URL = fl + '/query?where=1=1&outFields=' + field + ',' + secondField + '&f=json'
			
	var stopArray = []
			

	var xmlhttp = new XMLHttpRequest();

	
	if (token){

		URL = URL + "&token=" + token;

	}


	xmlhttp.open("GET",URL,false);

	xmlhttp.send();



	if (xmlhttp.status!==200){

		return xmlhttp.status;

	} else {

		var responseJSON=JSON.parse(xmlhttp.responseText)
	}


	if (responseJSON.error){

		return JSON.stringify(responseJSON.error);

	} else {

  
  	for (let i = 0; i < responseJSON.features.length; i += 1) {
  	  if (responseJSON.features[i].attributes.Saltmarsh === Saltmarsh) {
    		stopArray.push(responseJSON.features[i].attributes.stop_reference);
		
		}
	}
		var lastItem = stopArray.pop();
		return lastItem	
	}  
}