GlideAjax - return a value from callBack

[poyntzj]

I have a script in a catalog item that calls a function

function onChange(control, oldValue, newValue, isLoading) {
   if (isLoading || newValue == '') {
      return;
   }

	checkNameSpace();
   
}

the function is another Client script that runs onload and allows the function to be called - see below

Right now I am passing the variable strField to the callback and doing some processing there - which works, but it would be a lot easier for what I am doing to use some code like the below where I simply return a true/false and do something from the calling script.
(so this is a shared function and editing this for a number of target fields is quite simply bonkers when the calling script above, can get a true/false and do the work.  It keeps the script below simple and quicker)

I am however stumped at how to get that true / false from the callBack

function onLoad() {
}

checkNameSpace = function() {
	var strField = 'tenant_namespace';	
	g_form.hideFieldMsg(strField,true);
	var strName = g_form.getValue(strField)+'-' +g_form.getValue('tenant_environment')+'';
	if(strName.length < 6) {
             return true;
	}

	var ga = new GlideAjax('ValidationsAjax');
	ga.addParam('sysparm_name','checkNameSpace');
	ga.addParam('sysparm_environment',g_form.getValue('tenant_environment')+'');
	ga.addParam('sysparm_namespace',g_form.getValue(strField)+'');
	ga.getXMLAnswer(function(response){processNS(response,strField);});


	function processNS(response,strField) {
		try {
			var answer = response;
			if(answer =='true' || answer == true) {
				// Right now, I am doing some more work here on the strField  - I want to remove
				return true;
			} else {
				return false;
				// Right now, I am doing some more work here on the strField  - I want to remove
			}

		} catch(e) {
			console.log('check ns error : ' + e);
		}
	}

};

Any ideas if it can be done. I have not found anything

[Willem]

Try this:

function onChange(control, oldValue, newValue, isLoading) {
   if (isLoading || newValue == '') {
      return;
   }

	var returnValue = checkNameSpace();
    if(returnValue == true){// or just if(returnValue){}

    }
    else{

    }
   
}

And script include:

function onLoad() {
}

checkNameSpace = function () {
    var strField = 'tenant_namespace';
    g_form.hideFieldMsg(strField, true);
    var strName = g_form.getValue(strField) + '-' + g_form.getValue('tenant_environment') + '';
    if (strName.length < 6) {
        return true;
    }

    var ga = new GlideAjax('ValidationsAjax');
    ga.addParam('sysparm_name', 'checkNameSpace');
    ga.addParam('sysparm_environment', g_form.getValue('tenant_environment') + '');
    ga.addParam('sysparm_namespace', g_form.getValue(strField) + '');
    ga.getXMLAnswer(function (response) { 
        return processNS(response, strField); 
    });


    function processNS(response, strField) {
        try {
            var answer = response;
            if (answer == 'true' || answer == true) {
                // Right now, I am doing some more work here on the strField  - I want to remove
                return true;
            } else {
                return false;
                // Right now, I am doing some more work here on the strField  - I want to remove
            }

        } catch (e) {
            console.log('check ns error : ' + e);
        }
    }

};

[poyntzj]

I am sure this is on the methods I have tried but failed with

Trying to set a variable for the callBack and then returning that fails too as it tried to return "j" before the callback as finished

var j =  ga.getXMLAnswer(function (response) { 
        return processNS(response, strField); 
    });
return j;

getXMLWait can be so useful at times

[poyntzj]

Been looking at Promise, but failing there too.

Alas I have to finish what I am doing so will have to keep the work around in place, but I may look at again at some stage

[Willem]

You could try it with a callback function:

function onChange(control, oldValue, newValue, isLoading) {
    if (isLoading || newValue == '') {
        return;
    }

    checkNameSpace(callbackNameSpace);
}
function callbackNameSpace(boolOutcome) {
    if (boolOutcome) {
        //
    }
    else {

    }
}

function onLoad() {
}

checkNameSpace = function (callback) {
    var strField = 'tenant_namespace';
    g_form.hideFieldMsg(strField, true);
    var strName = g_form.getValue(strField) + '-' + g_form.getValue('tenant_environment') + '';
    if (strName.length < 6) {
        return true;
    }

    var ga = new GlideAjax('ValidationsAjax');
    ga.addParam('sysparm_name', 'checkNameSpace');
    ga.addParam('sysparm_environment', g_form.getValue('tenant_environment') + '');
    ga.addParam('sysparm_namespace', g_form.getValue(strField) + '');
    ga.getXMLAnswer(function (response) {
        processNS(response, strField, callback)
    });


    function processNS(response, strField, callback) {
        try {
            var answer = response;
            if (typeof callback === "function") {
                callback(answer);
            }

        } catch (e) {
            console.log('check ns error : ' + e);
        }
    }

};