Restricting Backward movement in Business Process Flow (CRM 2015) - crm

Question

We have a certain requirement in CRM 2015 in which we need to restrict backward movement in Business Process Flow for Non-S/S Admin users.
I iterated through Client API’s (including scripting for Upgrade 1) but I didn’t find any API for achieving using any of the exposed method. So, finally I wrote custom code for this by hijacking the backward movement of the Business Process Flow and prompting user that this is the restricted move for Non-S/S admin users.
However, this is an unsupported change and I see this won’t be an issue as long as DOM ids are same (since on a quick look I found DOM Ids are same in 2013, 2015 and 2015 Rollup1 for BPF).
function restrictBPFPreviousMove() {
var originalPreviousStageHandler = $("#stageBackActionContainer").data("events")["click"][0].handler;
$("#stageBackActionContainer").unbind("click");
$("#stageBackActionContainer").click(function (e) {
alert("Restricted Back Move!");
});
}
However, I was wondering if there is any alternative (supported) to this approach?

Answer 1

CRM 2015 has events for stage selection and change that can be handled.
Business Process Flow control events
Microsoft Dynamics CRM 2015 and
Microsoft Dynamics CRM Online 2015 Update provides two events for user
interaction with the business process flow control. OnStageChange
Occurs when a stage changes. More information: OnStageChange event.
OnStageSelected Occurs when a stage is selected. More information:
OnStageSelected event. There is no UI to register scripts for these
events. Use the following methods in functions registered in the form
OnLoad event to register your functions for these events.
Xrm.Page.data.process.addOnStageChange
Xrm.Page.data.process.addOnStageSelected
Xrm.Page.data.process.removeOnStageChange
Xrm.Page.data.process.removeOnStageSelected
You still have to check the role of the user by hand (retrieve systemuser, retrieve role, mix & match)

Answer 2

First get all the Stages guid with Xrm.Page.data.process.getActiveProcess().getStages() and store it in var as
var stage1= "efe2a761-9f5c-492c-9843-54decc2ab76a";
var stage2= "dddddd34-9f5c-492c-9843-54decc2ab76a";
var stage3= "abcdef12-9f5c-492c-9843-54decc2ab76a";
Next add a Event Handler using Xrm.Page.data.process.addOnStageChange() that checks for the Active stage guid as
var currentStageId = Xrm.Page.data.process.getActiveStage().getId();
then you try moving the stage using either of the following
Xrm.Page.data.process.moveNext();
Xrm.Page.data.process.movePrevious();
Xrm.Page.data.process.setActiveStage();