Help on validation on variable for "Close Task" button on catalog task record

[Tanya10]

Hello,
I have a requirement where one catalog variable is there which is visible on catalog task. User should not be able to close the task without filling this variable.
I have create ui policy which works fine if the user change the state from drop down it does make mandatory the variable but if user uses "Close Task" button the catalog task gets closed complete and later the the variable become mandatory.
How can we put restriction on "Close Task" button.
Below is the script

function closeTaskCheck() {
    var catalogItem = g_form.getValue('cat_item');
    // Check if this task belongs to a specific catalog item
    if (catalogItem == "xyz") {
        g_form.setMandatory('variables.link', true);

        if (!g_form.getValue('variables.link')) {
            alert("Please provide the link before closing this task.");
            return; // stop here, don't submit
        }
    }

    // Submit to trigger the server-side script
    gsftSubmit(null, g_form.getFormElement(), 'close_catalog_task');
}
if (typeof window == 'undefined') {
    // Authorization check
    if (current.assigned_to.nil() && gs.getUser().isMemberOf(current.assignment_group)) {
        current.assigned_to = gs.getUserID();
        current.state = 3;
        current.update();
    } else if ((gs.getUserID() == current.assigned_to && gs.getUser().isMemberOf(current.assignment_group)) || gs.hasRole("admin")) {
        current.state = 3;
        current.update();
    } else {
        gs.addErrorMessage("You are not authorized to close this task.");
        current.setAbortAction(true);
    }
}

[Nishant8]

Hello @Tanya10, you can convert your UI policy to Data Policy and verify. Keep the logic same since as you mentioned that it works fine when user changes the state manually.

Under the Data Policy Rule keep your field as mandatory.

Regards,

Nishant

[Tanya10]

I want to prevent this behavior -when user clicks on that UI Action button. It should not close complete the task if the  mandatory field is not filled in.
Manually change of state from drop down is taken care by UI policy