TYPO3 CMS 6.2 - Render a list of files by given folder path using TYPO3 core functionality (FILES cObject), extbase, fluid and a simple flexform plugin

ElementsController.php

<?php

class ElementsController extends \TYPO3\CMS\Extbase\Mvc\Controller\ActionController {

	/**
	 * Renders folder download CE
	 *
	* @return void
	*/
	public function folderdownloadsAction() {
		$this->view->assign('settings', $this->settings);
	}
}

?>

ext_localconf.php

<?php
if (!defined('TYPO3_MODE')) {
	die ('Access denied.');
}

\TYPO3\CMS\Extbase\Utility\ExtensionUtility::configurePlugin(
	'MyExtension.' . $_EXTKEY,
	'ContentRenderer',
	array(
		'Elements' => 'folderdownloads',
	),
	array(
		'Elements' => ''
	)
);

\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addTypoScript($_EXTKEY, 'setup', '[GLOBAL]
	tt_content.' . $_EXTKEY . '_folderdownloads < tt_content.list.20.' . $_EXTKEY . '_contentrenderer
	tt_content.' . $_EXTKEY . '_folderdownloads.switchableControllerActions.Elements.2 = folderdownloads', TRUE);

?>

ext_tables.php

<?php
if (!defined('TYPO3_MODE')) {
	die('Access denied.');
}

\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addPlugin(
	array('Folder Download', $_EXTKEY.'_folderdownloads'),
	'CType'
);

$TCA['tt_content']['types'][$_EXTKEY.'_folderdownloads']['showitem'] =
	'CType;;4;button;1-1-1, header, subheader, header_layout, pi_flexform,
	--div--;LLL:EXT:cms/locallang_tca.xml:pages.tabs.access, starttime, endtime, fe_group';

$TCA['tt_content']['columns']['pi_flexform']['config']['ds'][','.$_EXTKEY.'_folderdownloads'] =
	'FILE:EXT:'.$_EXTKEY.'/Configuration/FlexForms/flexform.xml';

?>

flexform.xml

<?xml version="1.0" encoding="UTF-8"?>
<T3DataStructure>
  <sheets>
    <sDEF>
      <ROOT>
        <TCEforms>
          <sheetTitle>Settings</sheetTitle>
        </TCEforms>
        <type>array</type>
        	<el>
			<settings.folders>
				<TCEforms>
					<label>Folder</label>
					<config>
			                        <type>group</type>
			                        <internal_type>folder</internal_type>
			                        <maxitems>1</maxitems>
			                        <size>1</size>
					</config>
				</TCEforms>
			</settings.folders>
        	</el>
      </ROOT>
    </sDEF>
  </sheets>
</T3DataStructure>

Folderdownloads.html

<f:layout name="ElementLayout" />

<f:section name="main">
	<f:cObject typoscriptObjectPath="lib.folderDownload" data="{settings}" />
</f:section>

setup.ts

# Lib for rendering FILES cObject
# http://docs.typo3.org/typo3cms/TyposcriptReference/ContentObjects/Files/Index.html
lib.folderDownload = FILES
lib.folderDownload {
	folders.field = folders

	stdWrap.wrap = <ul class="download-list">|</ul>
	renderObj = COA
	renderObj {
		wrap = <li>|</li>

		stdWrap.typolink < tt_content.uploads.20.renderObj.10.stdWrap.typolink
		stdWrap.typolink.ATagParams = class="download" title="{file:current:name}"
		stdWrap.typolink.ATagParams.insertData = 1

		# filename
		10 = TEXT
		10 {
			data = file:current:name
			htmlSpecialChars = 1
			required = 1
		}
	}
}