Kirby file upload

config.php

/**
 * File upload
 *
 *
**/
array(
	'pattern' => 'ajax/fileupload',
	'method' => 'POST',
	'action' => function () {
		$site = site();
		if ( !$site->user() ) return response::json( array( 'login' => '0' ) );
		if ( kirby()->request()->ajax() ) {
			$page = $site->find( $_POST[ 'path' ] );
			$root = $page->root();

			$name = $_FILES[ 'file' ][ 'name' ];

			$upload = new Upload( $root . DS . $name, array(
				'input' => 'file',
				'overwrite' => true
			));

			if ( $file = $upload->file() ) {
				
				// Structured field
				$data = array(
					'filename' => $file->filename(),
				);

				// add to structured field
				$files = $page->files()->yaml();
				$files[] = $data;
				$files = yaml::encode( $files );

				try {
					$page->update( array( 'files' => $files ));
				} catch ( Exception $e ) {
					$alert = $e->getMessage();
				}

				$data[ 'filename' ] = $page->image( $file->filename() )->url();
				return response::json( $data );
			} else {
				dump( $upload->error() );
			}
		} else {
			return page( $site->errorPage() );
		}
	}
),