Extract a Slicer / Parameter's members

// URL of the Pyramid installation and the path to the API 2.0 REST methods
var pyramidURL = "http://mysite.com/api2/";


// step 1: authenticate admin account and get token
// NOTE: callApi method is a generic REST method shown below.
let token = callApi("auth/authenticateUser",{
	"data":{
		"userName":"adminUser",
		"password":"abc123!"
	}
},false);


//step 2: find a parameter definition called "param x". Parameters are saved items to drive slicers
let calculation = callApi("content/findContentItem",{
	"searchParams": {
		"searchString": "param x",
		"filterTypes": [2],
		"searchMatchType": 2,
		"searchRootFolderType":0
	},
	"auth": token // admin token generated above
});

let paramId = calculation.data[0].id;

//step 3: get the parameter's elements
let parameterElements = callApi("query/getParameterElements",{
   "parameterId": paramId,
   "auth": token
});

let members = parameterElements.data.members // list for members
console.log(members);

//step 4: find a data discovery called "report x"
let dataDiscovery = callApi("content/findContentItem",{
	"searchParams": {
		"searchString": "report x",
		"filterTypes": [3],
		"searchMatchType": 2,
		"searchRootFolderType":0
	},
	"auth": token // admin token generated above
});


let reportId = dataDiscovery.data[0].id;

//step 5: extract the report results as JSON that have been filtered by the first member of the parameter found in step 3
let queryResult = callApi("query/extractQueryResult",{
   "data": {
      "itemId":reportId,
      "exportType":0, //JSON
      "exportOptions": {},
      "externalParameters": {
        "reportFilters" : [
         {
         "value": members[0].uniqueName
         }
        ]
      }
   },
   "auth": token
});

console.log(JSON.parse(queryResult.data));


// ##### optional generic logging method for debugging ##############
function log(msg){
	document.write(msg);
	console.log(msg);
}

// ##### generic REST API calling method ##############
function callApi(path,data,parseResult=true){
	var xhttp = new XMLHttpRequest();
	xhttp.open("POST", pyramidURL+path, false);
	xhttp.send(JSON.stringify(data));
	if(parseResult){
		return JSON.parse(xhttp.responseText);
	}else{
		return xhttp.responseText;
	}
}