ExportLayerToJSON.js

@import 'common.js'

var onRun = function(context) {
	var doc = context.document;
	var selection = context.selection;
	
	//make sure something is selected
	if(selection.count() == 0){
		doc.showMessage("Please select a layer.");
	}else{
		//allow xml to be written to the folder
		var fileTypes = [NSArray arrayWithObjects:@"json", nil];
		
		//create select folder window
		var panel = [NSOpenPanel openPanel];
		[panel setCanChooseDirectories:true];
		[panel setCanCreateDirectories:true];
		[panel setAllowedFileTypes:fileTypes];
		
		var clicked = [panel runModal];
		//check if Ok has been clicked
		if (clicked == NSFileHandlingPanelOKButton) {
			var isDirectory = true;
			//get the folder path
			var firstURL = [[panel URLs] objectAtIndex:0];
			//format it to a string
			var file_path = [NSString stringWithFormat:@"%@", firstURL];
			
			//remove the file:// path from string
			if (0 === file_path.indexOf("file://")) {
				file_path = file_path.substring(7);
			}
		}
		//loop through the selected layers and export the XML
		for(var i = 0; i < selection.count(); i++){
			var layer = selection[i];
			exportJSON(layer, file_path);
		}
	}
};

function exportJSON(layer, file_path){

  //initialize the layer array
  var layerArray = [];

  //create the variables
  var layerName = String(layer.name());
  var layerFrame = layer.absoluteRect();
  var layerXpos = String(layerFrame.x());
  var layerYpos = String(layerFrame.y());
  var layerHeight = String(layerFrame.height());
  var layerWidth = String(layerFrame.width());

  // add the strings to the array
  layerArray.push({
      name: layerName,
      xPos: layerXpos,
      yPos: layerYpos,
      height: layerHeight,
      width: layerWidth,
  });

	// Create the JSON object from the layer array
  var jsonObj = { "layer": layerArray };
  // Convert the object to a json string
  var file = NSString.stringWithString(JSON.stringify(jsonObj, null, "\t"));
  // Save the file
  [file writeToFile:file_path+layerName+".json" atomically:true encoding:NSUTF8StringEncoding error:null];

  var alertMessage = layerName+".json saved to: " + file_path;
  alert("Layer JSON Exported!", alertMessage);

}