OG Meta Tags for front module controller

[jonsecu]

Hi... I have generated a custom front module controller with its php and tpl files. I can access it through an URL with this form:

 

http://domain.com/tkn/index.php?fc=module&module=modulename&controller=default&id_example=1

 

Currently this php controller retrieves from the database some info based on the last id_example value and displays information by generating smarty variables and passing them to the default.tpl view. 

 

I would like to generate as well some metatags on the header like this:

<meta property="og:title" content="Content Example" />
<meta property="og:type" content="article" />
<meta property="og:url" content="http://domain.com/tkn/index.php?fc=module&module=modulename&controller=default&id_example=1" />
<meta property="og:image" content="http://domain.com/image.jpg" />
<meta property="og:description" content="Description Here" />
<meta property="og:site_name" content="Site Name" />

I want to do this so that when someone shares this front view controller, Facebook pulls automatically the information I placed on the tags here. I want to pass the tags contents through smarty variables. 

 

How should I get this done so that this meta tags appear only on the front controller view of this particular module?

 

Currently I used a hook on the modules main php to the header like this:

public function hookDisplayHeader($params)
  {
    $this->context->controller->addCSS($this->_path.'filename.css', 'all');
    $this->context->controller->addJS($this->_path.'filename.js', 'all');
    return $this->display(__FILE__, 'module-header.tpl');
  }

And wrote the meta tags on module-header.tpl... however, since it is a hook to the global header, the meta tags affect every page on the whole site. 

 

How can I write meta tags just to the module header?

 

Thank you very much!

[misthero]

public function hookDisplayHeader($params)

{

  if (Tools::getValue('module') == $this->name){

    $this->context->controller->addCSS($this->_path.'filename.css', 'all');

    $this->context->controller->addJS($this->_path.'filename.js', 'all');

    return $this->display(__FILE__, 'module-header.tpl');

  }

  return;

}

 

Edited May 19, 2014 by misthero (see edit history)