Intercept http status 419 somehow to popup the TC modal window

[brecke]

In 3akai-ux this is what we have:

    function(oae, $) {
        $.ajaxSetup({
            // Make caching the default behavior for $.getScript
            'cache': true,
            // Intercept 419 status indicating that the user has to accept the Terms and Conditions before continuing
            'complete': function(xhr, textStatus) {
                if (xhr.status === 419) {
                    // Update user status
                    oae.data.me.needsToAcceptTC = true;
                    // Hide any modal that might be open as bootstrap doesn't support 2 modals at once
                    $('.modal').modal('hide');
                    // Insert the Terms and Conditions widget in settings mode
                    var termsandconditionsId = oae.api.util.generateId();
                    oae.api.widget.insertWidget('termsandconditions', termsandconditionsId, null, true);
                }
            }
        });
        // Make sure that arrays passed in as arguments are properly encoded
        $.ajaxSettings.traditional = true;
        // Tell IE9 that cross-domain requests are a possibility when Amazon S3 is enabled
        // as the content storage strategy
        $.support.cors = true;

        return oae;
    }