Convert Illustrator files to Symbols

convertFilesToSymbols.jsx

var sourceFolder, 
    files, 
    fileType, 
    sourceDoc, 
    sourceArtwork,
    symbolRef;

//documents.add();
var docRef = documents[0];

// Select the source folder.
sourceFolder = Folder.selectDialog( 'Select a folder...', '~' );

// If a valid folder is selected
if ( sourceFolder != null )
{
	files = new Array();
	fileType = prompt( 'Select type of Illustrator files to you want to process. Eg: *.ai', ' ' );
	
	// Get all files matching the pattern
	files = sourceFolder.getFiles( fileType );
	
	if ( files.length > 0 )
	{	
        for ( i = 0; i < files.length; i++ ) {
			sourceDoc = new File(files[i]);
        	sourceArtwork = docRef.groupItems.createFromFile(sourceDoc);
        	
        	symbolRef = docRef.symbols.add(sourceArtwork);
            symbolRef.name = sourceDoc.name;
		}
		alert( 'symbols converted ');
	} else {
		alert( 'No matching files found' );
	}
}