[TYPO3-dev] CONTENT: add support for virtual table

[Xavier Perseguers]

Hi,

This morning I thought about something that is not (yet) possible in TS: 
do a "foreach" on virtual records, that is an array of arbitrary data.

Background: in an extension, you may easily allow arbitrary data to be 
processed by TS with:

$rows = array(
	array('id' => 1, 'name' => 'foo'),
	array('id' => 3, 'name' => 'foobar'),
	array('id' => 4, 'name' => 'foobarbar'),
);

$contentObj = t3lib_div::makeInstance('tslib_cObj');
$contentObj->start($data);

$content = '';
foreach ($rows as $row) {
	$content .= $contentObj->cObjGetSingle($conf['myRow'], $conf['myRow.']);
}
return $content;

and then let TypoScript be used to process it. E.g.,

plugin.myext_pi1 {
	myRow = TEXT
	myRow.field = name
}

However there is no way to perform the foreach in pure TS. It would be 
useful for instance if a userfunc could return a plain PHP array as 
variable $rows above:

class user_myext {
	public function getTestData($content, array $config) {
		return array(
			array('id' => 1, 'name' => 'foo'),
			array('id' => 3, 'name' => 'foobar'),
			array('id' => 4, 'name' => 'foobarbar'),
		);
	}
}

Attached patch allows this:

page = PAGE
page.10 = CONTENT
page.10.wrap = <ul> | </ul>
page.10 {
	table = virtual
	data = USER
	data.userFunc = user_myext->getTestData
	
	renderObj = COA
	renderObj {
		10 = TEXT
		10.field = id
		10.noTrimWrap = ||: |
		20 = TEXT
		20.field = name
		
		wrap = <li> | </li>
	}
}

and this will generate (prettified):

<ul>
	<li>1: foo</li>
	<li>3: foobar</li>
	<li>4: foobarbar</li>
</ul>

First chunk in the diff file is to allow USER/USER_INT to return an 
array without casting it to string.

This is not ready for Core, but I'd like to get your feeling/feedback to 
improve it.

Cheers
Xavier
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