I'd recommend developing a REST API and Web application (you can pack it via Cordova, etc.)?

Even better, you can write a responsive web application and not bother with packers altogether. Unless you need things like camera/gps... a responsive web site is easier to develop and support.

Subclass EnsLib.EMail.AlertOperation? It's hardcoded there.

Object approach:

Set sc = ##class(Security.Users).AddRoles("User", "Role1,Role2")

Documentation.

Have you modified Import method in your class to show errors?

 if $$$ISOK(tStatus) { set tCounter = tCounter + 1 } else { w $System.Status.GetErrorText(tStatus) return}

Most likely you're getting an error and import stops.

If you're on 2016.2+:

set json = "{""prop"":1}"
set obj = {}.%FromJSON(json)
write obj.prop

Documentation.

The general approach is:

1. XData to ZEN objects
2. Modify object(s)
3. Serialize back into XData.

Sample code (SAMPLES namespace):

/// This is the Desktop Demonstration page for the Zen demonstration application.
Class ZENDemo.AutoDemo Extends %ZEN.Component.page
{

/// Class name of application this page belongs to.
Parameter APPLICATION = "ZENDemo.Application";


/// This XML block defines the contents of this page.
XData Contents [ XMLNamespace = "http://www.intersystems.com/zen" ]
{
<page xmlns="http://www.intersystems.com/zen" title="Zen Desktop Demo">
<tablePane sql="SELECT ID,Name FROM Sample.Person WHERE Name %STARTSWITH ? ORDER BY Name">
<column colName="ID" hidden="0"/>
<column colName="Name"/>
<parameter value="Z"/>
</tablePane>
</page>
}

/// Toggles visibility of the ID column.
/// w $System.Status.GetErrorText(##class(ZENDemo.AutoDemo).Modify())
ClassMethod Modify() As %Status
{
    #Dim pSC As %Status = $$$OK
    #Dim tPage As %ZEN.Component.page
    #Dim tHidden As %Boolean
    Set tSC = ..GetPageObject(, .tPage)
    Quit:$$$ISERR(tSC) tSC

    Set tHidden = tPage.children.GetAt(1).columns.GetAt(1).hidden

    Write "Old ID column hidden value: ", tHidden, !

    Set tPage.children.GetAt(1).columns.GetAt(1).hidden = 'tHidden

    Write "New ID column hidden value: ", 'tHidden, !

    Set tNewStream = ##class(%Stream.TmpCharacter).%New()
    Set tSC = ##class(%ZEN.Utils).%ObjectToXML(tNewStream, tPage)

    Write "New XData: ", 'tHidden, !
    Do tNewStream.Rewind()
    Do tNewStream.OutputToDevice()
    Do tNewStream.Rewind()

    Set tSC = ..SavePage(,tNewStream)

    Do $system.OBJ.Compile($classname())

    Quit tSC
}

ClassMethod GetPageObject(pClassName = {$classname()}, Output pPage As %ZEN.Component.page) As %Status
{
    Set tReader = ##class(%XML.Reader).%New()
    Set tSC = tReader.OpenStream(##class(%Dictionary.CompiledXData).%OpenId(pClassName _ "||" _ "Contents").Data)
    If $$$ISERR(tSC) Quit tSC

    Do tReader.Correlate("page","%ZEN.Component.page")

    #; there should only be one page defined
    Do tReader.Next(.pPage,.tSC)
    Quit:$$$ISERR(tSC) tSC
    Quit:'$IsObject(pPage) $$$ERROR($$$GeneralError,"No <page> element defined in Contents block.")

    Quit tSC
}

ClassMethod SavePage(pClassName = {$classname()}, pStream) As %Status
{
    Set tCDef = ##class(%Dictionary.ClassDefinition).%OpenId(pClassName)
    If '$IsObject(tCDef) {
        Set tSC = $$$ERROR($$$GeneralError,"Unable to open class definition: " _ tClass)
    }
    #; find XDATA Contents block
    Set tIndex = tCDef.XDatas.FindObjectId(pClassName _ "||" _ "Contents")
    If (tIndex '= "") {
        #; get XDATA as stream
        Set tStream = tCDef.XDatas.GetAt(tIndex).Data
        Do tStream.CopyFrom(pStream)
    }
    Else {
        #; create a new XData block !!!
    }
    Set tSC = tCDef.%Save()
    Quit tSC
}

}

Calling:

Write $System.Status.GetErrorText(##class(ZENDemo.AutoDemo).Modify())

Toggles visibility of the ID column.

If I do a direct link without using the router it works fine

How fo you test directly? If you're doing it from a terminal, then that terminal process works as your OS user. Ensemble works under another OS user. Check that this user has access to file.

Angular pages are often templates filled with data (via REST) and so it' possible to use that. In the root broker of the application add request tracking (who accessed what and when).

OnPreDispatch method works for that purpose.

/// This method Gets called prior to dispatch of the request. Put any common code here
/// that you want to be executed for EVERY request. If pContinue is set to 0, the
/// request will NOT be dispatched according to the UrlMap. If this case it's the
/// responsibility of the user to return a response.
ClassMethod OnPreDispatch(pUrl As %String, pMethod As %String, ByRef pContinue As %Boolean) As %Status
{
    Quit $$$OK
}

Here's how you can do it

1. Extend %CSP.PageLookup class and redefine ShowStyleSheet method there.
2. Create custom tag calling your new search page

Documentation:

• Custom tags
• CSP:Search

How do you test?

Terminal runs under your own OS user.

Check this article on delegated authentication.

I am setting the software defined username in the Properties("Comment") array and wanting to reference it in the Rest Service Dispatch class.

Do you see delegated user getting created?

Properties("Comment") should be available as this user Comment property.

is there a way to return more specific messaging regarding the failure to the calling web application?

iirc both ZAUTHENTICATE main entry point and GetCredentials entry point return %Status so you can pass the error there.

Snapshot is a very technical abstraction.

If possible, it's better to convert it to business object(s) and pass that.

What is your question?

Declarative programming is somewhat related.

Use SET command:

set ^A("ID1")="Name\Abb\Map"
set ^A("ID2")="Name\Abb\Map"
set ^A("ID3")="Name\Abb\Map"

Why do you want to set classes storage directly?