var inFolder = Folder.selectDialog("Please select folder to process");

if(inFolder !== null) {
	if(confirm('Tutti i file verranno sovrascritti (se l\'estensione è jpg altrimenti verranno copiati con estensione jpg), continuare?')) {
        var newName      = prompt('Nome file (se vuoto i file non verranno rinominati)', '');
        var resizeWidth  = prompt('Resize width (px)', '1200');
        if(resizeWidth != null && resizeWidth != "") {
            traverseFolder(inFolder);
        }
        else {
            alert("inserire delle dimensioni valide");    
        }
	}
}
 

function visitFolder(inFolder)
{
	var fileList 		= inFolder.getFiles(/\.(jpg|tif|psd|)$/i);
	//var outfolder 		= new Folder(decodeURI(inFolder) + "/" + outfolderName);

	//if (!outfolder.exists) outfolder.create();

	for(var a = 0; a < fileList.length; a++) {
		if(fileList[a] instanceof File) {
		  var doc = open(fileList[a]);
		  var docname = fileList[a].name.replace(/\.[^\.]+$/, '');
		  //zoomify(docname);
		  doc.close(SaveOptions.DONOTSAVECHANGES);
		}
	}

}

function zoomify(path) {
    var savedRuler    = app.preferences.rulerUnits;
    var filename      = app.activeDocument.name;
    var w             = app.activeDocument.width.as('px');
    //var h             = app.activeDocument.height;
    var quality       = 80;

    app.preferences.rulerUnits = Units.PIXELS;

    // se la larghezza è inferiore a 1200px non fare nulla 42,33 in cm
    if(w > resizeWidth) {
        app.activeDocument.resizeImage(resizeWidth+'px', null, null, ResampleMethod.BICUBICSHARPER);
    }
    app.preferences.rulerUnits = savedRuler;
    
    //var outfolder = new Folder(decodeURI(inFolder) + "/" + outfolderName + "/");
    //if (outfolder.exists === false) outfolder.create();
    if(newName != null && newName != "") {
        // il vecchio file è da cancellare
        var deleteFile = new File(path + "/" + filename);
        // nuovo filename
        filename = newName+"_"+Math.random()+".jpg";
    }
	
	// prendo l'estensione del file 
	filext			= filename.split('.').pop();
	newfilename		= filename.replace(filext, "jpg");
		
    var saveFile = new File(path + "/" + newfilename);
    
    // rimuovo il vecchio file
    if(newName != null && newName != "") {
        deleteFile.remove();
    }
    
	SaveJPEG(saveFile, quality);
}

function SaveJPEG(saveFile, quality) {
  var exportOptionsSaveForWeb = new ExportOptionsSaveForWeb();
  exportOptionsSaveForWeb.format = SaveDocumentType.JPEG;
  exportOptionsSaveForWeb.includeProfile = false;
  exportOptionsSaveForWeb.interlaced = true;
  exportOptionsSaveForWeb.optimized = true;
  exportOptionsSaveForWeb.quality = quality;

  activeDocument.exportDocument(saveFile, ExportType.SAVEFORWEB,exportOptionsSaveForWeb);
}





function traverseFolder(path)  
{  
     // Create new folder object based on path string  
     var folder = new Folder(path);
	 
     // Get all files in the current folder  
     var files = folder.getFiles();  
	 // se non esiste la cartella

	//var outfolder 		= new Folder(decodeURI(inFolder) + "/" + outfolderName + "/" + path);
	//if (!outfolder.exists) outfolder.create();
     
	 
	 // Loop over the files in the files object  
     for (var i = 0; i < files.length; i++)  
     {  
          // Check if the file is an instance of a file  
          // else call the traverse folder recursively with the current folder as an argument  
          if (files[i] instanceof File)  
          {   
               // Convert the file object to a string for matching purposes (match only works on String objects)  
               var fileString = String(files[i]);  
  
               // Check if the file contains the right extension  
               if (fileString.match(/.(jpg|tif|psd|bmp|gif|png)$/i))  
               {  
                    // Do something if the file matches  
                    //alert(fileString + 'good file');  					
					var doc = open(files[i]);
					var docname = files[i].name.replace(/\.[^\.]+$/, '');
					zoomify(path);
					doc.close(SaveOptions.DONOTSAVECHANGES);
               }  
               else  
               {  
                    // Do something if the file doesn't match  
                    //alert(fileString + 'bad file');  
               }  
          }  
          else  
          {  
               //alert('passing folder: ' + files[i]);
               // Call method recursively with the current folder as an argument  
               traverseFolder(files[i]);  
          }  
     }  
}