Illustrator javascript doodle color shapes and export layers to png

this is a simple doodle in Illustrator using javascript that has an example of creating functions, coloring shapes with a fill color, and exporting layers to png.  i'm still new to javascript so this example doesn't have a ui yet.  there may be bugs or better ways to implement so please use modify at your own risk.

//a simple tool to color all shapes in illustrator document and then export each layer to png


//utility methods
function getLayersVisibilityDict(doc)
{
	/*
	Args:
		doc (document object)
	Returns:
		(dictionary): keys int indexes values bool for whether layer is visible
	*/
	var result = {};
	for(var i=0; i<doc.layers.length; i++)
	{
		result[i] = doc.layers[i].visible;
	}

	return result;
}

function setLayersVisibilityByDict(doc, data)
{
	/*
	Args:
		doc (document object)
		data (dictionary): keys are layer index value is visiblity to set to
	*/
	for(var i=0; i<doc.layers.length; i++)
	{
		doc.layers[i].visible = data[i];
	}
}
//end utility methods


//color all shapes
function colorAllShapes(r, g, b)
{
	/*
	Args:
		r (int) red rgb value
		g (int) green rgb value
		b (int) blue rgb value
	*/

	//requires setting all layers visible first.

	alert("coloring all shapes");

	//get reference to active document
	var doc = app.activeDocument;

	layerVisibilityDict = getLayersVisibilityDict(doc); //starting layer visiblity

	//make all layers visible
	for(var i=0; i<doc.layers.length; i++)
	{
		doc.layers[i].visible = true;
	}

	//loop all paths
	for(var i=0; i<doc.pathItems.length; i++)
	{
		shape = doc.pathItems[i];
		color = new RGBColor();
		color.red = r;
		color.green = g;
		color.blue = b;
		//fill shape with color
		shape.fillColor = color;
		//ensure shape has fill
		shape.filled = true;
	}

	//restore layer visibility
	setLayersVisibilityByDict(doc, layerVisibilityDict);
}



//function that acts as a constructor. for older illustrator that doesnt have class available
function LayerExporter(){
	/*responsible for exporting illustrator layers to individual png files
	*/
	
	this.doc = app.activeDocument;

	//export each layer to individual png files
	this.doIt = function()
	{
		var doc = this.doc;
		if(!doc)
		{	
			alert("no active document");
			return;
		}

		//todo get export folder from artist
		//var exportDir = "/Users/Nathaniel/Desktop/learning_/illustrator_dev_testing/coloringShapes";

		var exportFolder = Folder.selectDialog("Select a folder to export layers to");
		//new Folder(exportDir);

		if(!exportFolder)
		{
			alert("no export folder");
			return;
		}

		//export options
		var exportOptions = new ExportOptionsPNG24();
		exportOptions.antiAliasing = true; //enable anti aliasing
		exportOptions.transparency = true; //preserve transparency
		exportOptions.artBoardClipping = true; //if false it might export stuff outside art clip board
		exportOptions.horizontalScale = 100; //100 pct scale
		exportOptions.verticalScale = 100; //100 pct scale


		//store starting layer visibility
		const layersVisiblityDict = getLayersVisibilityDict(this.doc);

		//iterate through each layer
		for(var i=0; i<doc.layers.length; i++)
		{
			var currentLayer = doc.layers[i];
			//hide all other layers
			this.hideAllLayersExceptIndex(i);

			//construct file name
			var exportFileName = currentLayer.name+".png";
			var exportFileObj = new File(exportFolder.fsName + "/" + exportFileName);

			//export current visible layer
			doc.exportFile(exportFileObj, ExportType.PNG24, exportOptions);
		}
		
		//restore visibility of layers
		setLayersVisibilityByDict(this.doc, layersVisiblityDict);
	}


	this.hideAllLayersExceptIndex = function(indexShow)
	{
		/*
		Args:
			indexShow (int): the index to make visible
		*/
		var doc = this.doc;

		for(var i=0; i<doc.layers.length; i++)
		{
			doc.layers[i].visible = (i == indexShow); //google searched tip to shorten code. it gives false most of time except when counter is index
		}
	}

}

function doIt()
{
	//hard coded color
	colorAllShapes(r=0, g=0, b=255);


	//exporting layers
	var layerExporter = new LayerExporter();
	layerExporter.doIt();
}

doIt();

 

Thanks for looking