script that converts layers to separate smart objects

I frequently have to convert layers to smart objects, and sometimes I'd like to convert many layers at once into separate smart objects. If I select all of these layers and convert to smart objects, I end up with a single smart object layer. I'd like the option to convert them into separate objects, rather than what I do now: do each layer one at a time. It's tedious and wastes time.

Also discussed here (all layers, not selected):

https://community.adobe.com/t5/photoshop/smart-objects-in-separate-layers/td-p/11137197

It’s not elegant (and therefore not as fast as possible) but you can give it a try. 

//2018, use it at your own risk
if (app.documents.length > 0) {
smartifyAndGetSelectedLayersIdxEtc()
};
////// get array of arrays of smart objects witrh index, center and half-dimensions //////
function smartifyAndGetSelectedLayersIdxEtc(){
var selectedLayers = new Array;
var ref = new ActionReference();
ref.putEnumerated( charIDToTypeID("Dcmn"), charIDToTypeID("Ordn"), charIDToTypeID("Trgt") );
var desc = executeActionGet(ref);
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++){
		try{ 
			activeDocument.backgroundLayer;
			selectedLayers.push(  desc.getReference( i ).getIndex() );
		}catch(e){
			selectedLayers.push(  desc.getReference( i ).getIndex()+1 );
		};
	 }
 }else{
	var ref = new ActionReference();
	ref.putProperty( charIDToTypeID("Prpr") , charIDToTypeID( "ItmI" )); 
	ref.putEnumerated( charIDToTypeID("Lyr "), charIDToTypeID("Ordn"), charIDToTypeID("Trgt") );
	try{ 
		activeDocument.backgroundLayer;
		selectedLayers.push( executeActionGet(ref).getInteger(charIDToTypeID( "ItmI" ))-1);
	}catch(e){
		selectedLayers.push( executeActionGet(ref).getInteger(charIDToTypeID( "ItmI" )));
	};
};
////////////////////////////////////
var theArray = new Array;
var theIDs = new Array;
for (var m = 0; m < selectedLayers.length; m++) {
var thisIndex = selectedLayers[m];
var ref = new ActionReference();
ref.putIndex( charIDToTypeID("Lyr "), thisIndex); 
var layerDesc = executeActionGet(ref);
var thisID = layerDesc.getInteger(stringIDToTypeID("layerID"));
var theKind = layerDesc.getInteger(stringIDToTypeID("layerKind"));
var theName = layerDesc.getString(stringIDToTypeID("name"));
var theVisibility = layerDesc.getInteger(stringIDToTypeID("visible"));
var theBounds = layerDesc.getObjectValue(stringIDToTypeID("bounds"));
var halfWidth = theBounds.getUnitDoubleValue(stringIDToTypeID("width")) / 2;
var halfHeight = theBounds.getUnitDoubleValue(stringIDToTypeID("height")) / 2;
var theX = theBounds.getUnitDoubleValue(stringIDToTypeID("left")) + halfWidth;
var theY = theBounds.getUnitDoubleValue(stringIDToTypeID("top")) + halfHeight;
// is normal, shape, smart object, pattern, gradiet, solid color;
if (theKind == 1 || theKind == 4 || theKind == 5 || theKind == 9 || theKind == 10 || theKind == 11) {
if (theVisibility == true) {
theIDs.push ([thisID, theX, theY, halfWidth, halfHeight, theName])
}
}
};
////////////////////////////////////
for (var n = 0; n < theIDs.length; n++) {
if (hasSmartObject(theIDs[n][0]) == false) {
	try {
		selectLayerByID(theIDs[n][0], false);
		var id557 = charIDToTypeID( "slct" );
		var desc108 = new ActionDescriptor();
		var id558 = charIDToTypeID( "null" );
		var ref77 = new ActionReference();
		var id559 = charIDToTypeID( "Mn  " );
		var id560 = charIDToTypeID( "MnIt" );
		var id561 = stringIDToTypeID( "newPlacedLayer" );
		ref77.putEnumerated( id559, id560, id561 );
		desc108.putReference( id558, ref77 );
		executeAction( id557, desc108, DialogModes.NO );
		theArray.push([getLayerId(app.activeDocument.activeLayer), theIDs[n][1], theIDs[n][2], theIDs[n][3], theIDs[n][4], theIDs[n][5]]);
		} catch (e) {}
	}
else {theArray.push(theIDs[n])};
};
////////////////////////////////////
// select;
selectLayerByID(theArray[0][0],false);
for (var a = 1; a < theArray.length; a++) {selectLayerByID(theArray[a][0], true)};
//return;
return theArray
////////////////////////////////////
};
// by mike hale, via paul riggott;
function getLayerId(theLayer){
// http://forums.adobe.com/message/1944754#1944754
app.activeDocument.activeLayer = theLayer;
//Assumes activeDocument and activeLayer	
    var ref = new ActionReference(); 
    ref.putEnumerated(charIDToTypeID("Lyr "), charIDToTypeID("Ordn"), charIDToTypeID("Trgt")); 
    d = executeActionGet(ref); 
return d.getInteger(charIDToTypeID('LyrI')); 
};
////// smart object or not //////
function hasSmartObject(idx){
var ref = new ActionReference(); 
ref.putProperty( charIDToTypeID("Prpr") , stringIDToTypeID( "smartObject" )); 
//ref.putIndex( charIDToTypeID( "Lyr " ), idx);
ref.putIdentifier( charIDToTypeID( "Lyr " ), idx);
var desc = executeActionGet(ref);
if(desc.hasKey(stringIDToTypeID('smartObject'))) {return true}
else {return false};
};
////// based on code by mike hale and paul riggott //////
function selectLayerByID(index,add){ 
add = undefined ? add = false:add 
var ref = new ActionReference();
    ref.putIdentifier(charIDToTypeID("Lyr "), index);
    var desc = new ActionDescriptor();
    desc.putReference(charIDToTypeID("null"), ref );
       if(add) desc.putEnumerated( stringIDToTypeID( "selectionModifier" ), stringIDToTypeID( "selectionModifierType" ), stringIDToTypeID( "addToSelection" ) ); 
      desc.putBoolean( charIDToTypeID( "MkVs" ), false ); 
   try{
    executeAction(charIDToTypeID("slct"), desc, DialogModes.NO );
}catch(e){
alert(e.message); 
}
};