Invision Power Services, Inc.
* @copyright (c) 2001 - 2016 Invision Power Services, Inc.
* @license http://www.invisionpower.com/legal/standards/
* @package IPS Community Suite
* @since 16 May 2017
*/
namespace IPS\core\Facebook;
/* To prevent PHP errors (extending class does not exist) revealing path */
use IPS\Patterns\Singleton;
use IPS\Settings;
use function count;
use function defined;
use function is_array;
if ( !defined( '\IPS\SUITE_UNIQUE_KEY' ) )
{
header( ( $_SERVER['SERVER_PROTOCOL'] ?? 'HTTP/1.0' ) . ' 403 Forbidden' );
exit;
}
/**
* Facebook Pixel class
*/
class Pixel extends Singleton
{
/**
* @brief Singleton Instances
*/
protected static ?Singleton $instance = NULL;
/**
* @brief Data Store
*/
protected ?array $data = NULL;
/**
* @brief Events
*/
protected static ?array $events = NULL;
/**
* Output for JS inclusion
*
* @return string|null
*/
public function output() : ?string
{
if ( $this->data === NULL )
{
return "fbq('track', 'PageView');";
}
$return = array();
if ( ! isset( $this->data['PageView'] ) )
{
$this->data['PageView'] = true;
}
foreach( $this->data as $name => $params )
{
$inlineParams = '';
if ( is_array( $params ) and count( $params ) )
{
$inlineParams = json_encode( $params );
}
if ( $inlineParams )
{
$return[] = "fbq('track', '{$name}', " . $inlineParams . " );";
}
else
{
$return[] = "fbq('track', '{$name}');";
}
}
return count( $return ) ? implode( "\n", $return ) : null;
}
/**
* Output for noscript inclusion
*
* @return string|null
*/
public function noscript() : ?string
{
if ( $this->data === NULL )
{
return '->fb_pixel_id . '&ev=PageView&noscript=1)
';
}
$return = array();
if ( ! isset( $this->data['PageView'] ) )
{
$this->data['PageView'] = true;
}
foreach( $this->data as $name => $params )
{
$url = 'https://www.facebook.com/tr?id=' . Settings::i()->fb_pixel_id . '&ev=' . $name;
if ( is_array( $params ) and count( $params ) )
{
$url .= '&' . http_build_query( array( 'cd' => $params ), '', '&' );
}
$return[] = '
';
}
return count( $return ) ? implode( "\n", $return ) : null;
}
}