Hello @fotis and K2 devs,

I want to use K2 as a content source in the Yootheme Pro builder.  YOOtheme
I am in contact with the Zoolanders team to think about the feasibility of this development. They are interested in the subject, but need a relay in your teams for some information.
Who would be the person available for this?

I think this project would be a great asset for the attractiveness of K2 because Yootheme has become a major player in terms of visual builder for Joomla.

I am at your disposal for any question on the subject.
Thanks in advance,
Phil
 

Hi everyone,

I went ahead and put together a draft for this possible integration to find out a first major issue. YOOtheme Pro Builder relies on the onLoadTemplate joomla standard event to determine the context of the current view, turns out K2 doesn't fire such event.

If this is confirmed, I would like to know about the reasons and possible fixes. If is not, would appreciate some support on the matter.

Thanks!

What YTP does to allow for the builder templating is register a new _path in the Joomla View Classes dynamically. This path is actually a stream wrapper, that simply introduces this new onLoadTemplate event in Joomla. This is because Joomla itself does not trigger an even when a view is loading a template in its loadTemplateLayout call in View classes.

Unfortunately K2, in the display method of its views, calls addPath a number of times after the YTP stream wrapper is registered (which happens in the Joomla onBeforeDisplay event), and therefore the stream wrapper (and the new event) is not called, since Joomla takes the first path in the list.

Possible solutions:

1. Move the addPath calls before Joomla calls the onBeforeDisplay event, which means not in the View display method
2. Trigger this custom onLoadTemplate event yourselves after the various addPath calls in your views.

Hi, colleague of Miljan (ZOOlanders) here.

Basically what YTP does is custom triggering that even with 2 parameters, the view object and the template file.

here's the specifis:

$app = Factory::getApplication();
$app->triggerEvent('onLoadTemplate', [$view, $tpl]);

where
$view is the View object (children of the JView class)
$tpl is the name of the layout used, without path or extension (example "links" or "content"). They take it form the $view-->getLayout() method.

The full code of their beforeDisplay listener that does this is

public static function beforeDisplay(Config $config, $event)
{
if ($config('app.isAdmin')) {
return;
}

$view = $event->getArgument('subject');

// loader callback for template event
$loader = function ($path) use ($view) {
// Clone view to avoid mutations on the original view
$copy = clone $view;
$copy->set('_output', null);
$copy->set('context', basename($copy->get('_basePath')) . ".{$copy->getName()}");
$tpl = substr(basename($path, '.php'), strlen($copy->getLayout()) + 1) ?: null;

var_dump('TPL: ' . $tpl);
var_dump('Class: ' . get_class($copy));

$app = Factory::getApplication();
$app->triggerEvent('onLoadTemplate', [$copy, $tpl]);

return $copy->get('_output');
};

// register the stream wrapper
if (!in_array('views', stream_get_wrappers())) {
stream_wrapper_register('views', StreamWrapper::class);
}

// add loader using a stream reference
// check if path is available (StackIdeas com_payplan)
if ($path = $view->get('_path')) {
array_unshift($path, 'views://' . StreamWrapper::setObject($loader));
$view->set('_path', $path);
}
}

Hope this helps!

Did a PR so you have less work ahead of you :)

github.com/getk2/k2/pull/551