How can I wait for the result of aras.evalMethod when the called Method opens a dialog?

Question

Hi community, 
 I have a custom button inside Form that leads to a custom Method. This Method calls a second client Method with aras.evalMethod. The second Method does a few checks and then opens a "confirm" dialog. User have to press OK or cancel the dialog. 
 The overall concept works fine, but I cannot get a valid result of the aras.evalMethod call. The second Method shall return the result of the selected dialog option. But the first Method doesn&acute;t wait for the result of the second Method. So my result will be empty / undefined. 
 
 First Method 
 
 const args = "";
const result = aras.evalMethod("MySecondMethod", document.thisItem, args);
if (typeof result == "object" || result === false)
{
 return;
}

alert(result); // We immeditelly get this alert after the Method call. It will be empty, as the dialog it self wasn&#180;t resolved yet.

//&#160;Other code, e.g. hide a button
const el=document.getElementById("myelement");
el.style.visibility = "hidden"; 
 
 Second Method 
 [...]
window.ArasModules.Dialog.confirm(message, dialogOptions).then(
function(res) 
{
 switch (res) 
 {
 case 'ok':
 dosomething();
 return true;
 default:
 return false;
 }
});

I tried using promises and async/await. But so far aras.evalMethod never waited for anything. 
 I could merge the two Methods, but currently the second Method is called from multiple contexts. So this is something I want to avoid if possible. 
 Does anyone has an idea that could work to improve the situation? 
 Thanks! 
 Angela

Christopher Gillis · Accepted Answer

Hi Angela, 
 I was able to get this working by returning the promise from the second method in this example, i.e.: 
 return window.ArasModules.Dialog.confirm(message, dialogOptions).then(
function(res) 
{
 switch (res) 
 {
 case 'ok':
 dosomething();
 return true;
 default:
 return false;
 }
}); 
 I could then handle the result of this promise in the first method by adding a `.then` statement to the aras.evalMethod call, i.e.: 
 aras.evalMethod("MySecondMethod", document.thisItem, args).then((result) => {
 if (typeof result == "object" || result === false)
 {
 return;
 }
 
 alert(result); // We immeditelly get this alert after the Method call. It will be empty, as the dialog it self wasn&#180;t resolved yet.
 
 //&#160;Other code, e.g. hide a button
 const el=document.getElementById("myelement");
 el.style.visibility = "hidden";
})
 
 This isn't a perfect solution in that it does require changing the second method to return a promise which may interfere with how it's being used elsewhere. Let me know if this works for your use case though.

How can I wait for the result of aras.evalMethod when the called Method opens a dialog?

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