Splitting layer into RGB layers in a group - newbie

Question

I'm a newbie trying to split a selected layer into multiple layers, each with only one channel enabled. What I mean into the script below, I’d like to do that same thing I do manually by going into Layer Style, in Advanced blending where it has the Channels R checkbox, G checkbox, B checkbox, for my R layer uncheck the G & B.
I've got a start on grouping, copying the layers, renaming them as I'd like, but I don't know how to do the equivalent of what I described above.
What I have so far...
var doc = app.activeDocument,
      currentLayer = doc.activeLayer;
var group = doc.layerSets.add();
      group.name = currentLayer.name;
var bLayer = currentLayer.duplicate(); // duplicate layer in target doc
      bLayer.name = 'Blue:' + currentLayer.name;
         currentLayer.visible =false;
//somehow here  I’d like to do that same thing I do manually in
//Layer Style, in Advanced blending it has
//Channels R checkbox, G checkbox, B checkbox
//for my R layer uncheck the G & B
      bLayer.move( group, ElementPlacement.PLACEATEND ); // move it
      doc.activeLayer = bLayer;
var gLayer = bLayer.duplicate();
      gLayer.name = 'Green:' + currentLayer.name;
      gLayer.blendMode = BlendMode.NORMAL;
//somehow here  I’d like to do that same thing I do manually in
//Layer Style, in Advanced blending it has
//Channels R checkbox, G checkbox, B checkbox
//for my G layer uncheck the R & B
      gLayer.opacity = 100.0;
      doc.activeLayer = gLayer;
var rLayer = gLayer.duplicate();
      rLayer.name = 'Red:' + currentLayer.name;
      rLayer.blendMode = BlendMode.NORMAL;
//somehow here  I’d like to do that same thing I do manually in
//Layer Style, in Advanced blending it has
//Channels R checkbox, G checkbox, B checkbox
//for my R layer uncheck the G & B
      rLayer.opacity = 100.0;
      doc.activeLayer = rLayer;

Answer 1

I looked around and finally did this by creating actions and then calling the actions.  I then added a loop that loops around all selected layers, using what I found at:
https://forums.adobe.com/thread/1536677
So with more research I answered my question.  Below is my script if others find it useful...
#target photoshop
alert("copying each layer in group with R, G, B layers");
runMulti();
// run();   
function runMulti(){
    var selLay = getSelectedLayersIdx();
    if( selLay.constructor != Array ) selLay = [ selLay ];
    for( var i=0; i<selLay.length; i++){
        multiSelectByIDx(selLay[i]);
        run();
function run (){
var doc = app.activeDocument,
        currentLayer = doc.activeLayer;
// test script: what I really want loop around all of the layers in the doc, not just the active one
// so I want to create a group for each of the original layers
var group = doc.layerSets.add();
        group.name = currentLayer.name;
var bLayer = currentLayer.duplicate(); // duplicate layer in target doc
        bLayer.name = 'Blue:' + currentLayer.name;
         currentLayer.visible =false;
        bLayer.move( group, ElementPlacement.PLACEATEND ); // move it
        doc.activeLayer = bLayer;
//what the action "blue" does is in
//Layer Style, in Advanced blending it has
//Channels R checkbox, G checkbox, B checkbox
//for my B layer uncheck the R & G
          app.doAction("blue", "Default Actions");
var gLayer = bLayer.duplicate();
        gLayer.name = 'Green:' + currentLayer.name;
        gLayer.blendMode = BlendMode.NORMAL;
        gLayer.opacity = 100.0;
        doc.activeLayer = gLayer;
//what the action green does is in
//Layer Style, in Advanced blending it has
//Channels R checkbox, G checkbox, B checkbox
//for my G layer uncheck the R & B     
         app.doAction("green", "Default Actions");
var rLayer = gLayer.duplicate();
        rLayer.name = 'Red:' + currentLayer.name;       
        rLayer.blendMode = BlendMode.NORMAL;
        rLayer.opacity = 100.0;
        doc.activeLayer = rLayer;
//what the action red does is in
//Layer Style, in Advanced blending it has
//Channels R checkbox, G checkbox, B checkbox
//for my R layer uncheck the G & B  
          app.doAction("red", "Default Actions");
function hasBackground(){// function to check if there is a background layer
    var res = undefined;
    try{
        var ref = new ActionReference();
        ref.putProperty( charIDToTypeID("Prpr") , charIDToTypeID("Nm  "));
        ref.putIndex( charIDToTypeID("Lyr "), 0 );
        executeActionGet(ref).getString(charIDToTypeID("Nm  ") );
        res = true;
    }catch(e){ res = false}
    return res;
function getSelectedLayersIdx(){// get the selected layers index( positon in layer editor)
     var selectedLayers = new Array;
     var ref = new ActionReference();
     ref.putEnumerated( charIDToTypeID('Dcmn'), charIDToTypeID('Ordn'), charIDToTypeID('Trgt') );
     var desc = executeActionGet(ref);
     var add = 1;
     if(hasBackground()){add = 0}
     if( desc.hasKey( stringIDToTypeID( 'targetLayers' ) ) ){
          desc = desc.getList( stringIDToTypeID( 'targetLayers' ));
          var c = desc.count
          var selectedLayers = new Array();
          for(var i=0;i<c;i++){
               selectedLayers.push(  (desc.getReference( i ).getIndex()) + add);
     }else{
          var ref = new ActionReference();
          ref.putProperty( charIDToTypeID('Prpr') , charIDToTypeID( 'ItmI' ));
          ref.putEnumerated( charIDToTypeID('Lyr '), charIDToTypeID('Ordn'), charIDToTypeID('Trgt') );
          srs = hasBackground()?executeActionGet(ref).getInteger(charIDToTypeID( 'ItmI' ))-1:executeActionGet(ref).getInteger(charIDToTypeID( 'ItmI' ));
          selectedLayers.push( srs);
     return selectedLayers;
function multiSelectByIDx(idx) {
  if( idx.constructor != Array ) idx = [ idx ];
    var layers = new Array();
    var id54 = charIDToTypeID( "slct" );
    var desc12 = new ActionDescriptor();
    var id55 = charIDToTypeID( "null" );
    var ref9 = new ActionReference();
    for (var i = 0; i < idx.length; i++) {
          layers[i] = charIDToTypeID( "Lyr " );
          ref9.putIndex(layers[i], idx[i]);
    desc12.putReference( id55, ref9 );
    var id58 = charIDToTypeID( "MkVs" );
    desc12.putBoolean( id58, false );
    executeAction( id54, desc12, DialogModes.NO );