_main_obj = $main_obj;
add_action( 'init', array($this, 'amp_init') ); // for amp pages.
} // End __construct
/**
* Loads the form's preview in AMP pages.
*
* @return void.
*/
public function amp_init()
{
if(
!empty($_GET['cff-amp-form']) &&
get_option('CP_CALCULATEDFIELDSF_AMP', CP_CALCULATEDFIELDSF_AMP)
)
{
$atts = $this->_params_to_attrs();
$page_title = (!empty($atts['page_title'])) ? $atts['page_title'] : '';
print ''.
''.
''.
''.
''.esc_html($page_title).'';
// Patch for editor preview
if(empty($_GET['cff-editor-preview']))
{
print '';
}
global $wp_styles, $wp_scripts;
if(!empty($wp_scripts)) $wp_scripts->reset();
$message = $this->_main_obj->public_form($atts);
// Patch for editor preview
if(empty($_GET['cff-editor-preview']))
{
$message = preg_replace('/do_items();
if(!empty($wp_scripts)) $wp_scripts->do_items();
if(class_exists('Error'))
{
try{ wp_footer(); } catch(Error $err) {}
}
$message .= ob_get_contents();
ob_end_clean();
// Patch for editor preview
if(!empty($_GET['cff-editor-preview']))
{
$message .= '';
}
print ''.
''.
$message.
''.
'';
remove_all_actions('shutdown');
exit;
}
} // End amp_init
/**
* Checks if the page is AMP or not
*
* Checks first for the existence of functions: "is_amp_endpoint" or "ampforwp_is_amp_endpoint",
* and if they don't exists, checks the URL.
*
* @return bool.
*/
public function is_amp()
{
if(!get_option('CP_CALCULATEDFIELDSF_AMP', CP_CALCULATEDFIELDSF_AMP)) return false;
if(!empty($_REQUEST['isamp'])) return true;
if(empty($_GET['non-amp']))
{
if( function_exists('ampforwp_is_amp_endpoint') ) return ampforwp_is_amp_endpoint();
elseif( function_exists('is_amp_endpoint') ) return is_amp_endpoint();
}
return false;
} // End is_amp
/**
* Returns an iframe tag for loading the a webpage with the form only, specially useful for AMP pages.
*
* @return string, the iframe tag's structure for loading a page with the form.
*/
public function get_iframe( $atts )
{
$url = CPCFF_AUXILIARY::site_url();
$url = preg_replace('/^http\:/i', 'https:', $url);
$url .= (strpos($url, '?') === false) ? '?' : '&';
$url .= 'cff-amp-form='.((!empty($atts['id']))?$atts['id'] : '');
$height = '';
foreach($atts as $attr_name => $attr_value)
{
if('amp_iframe_height' == $attr_name) $height = $attr_value;
elseif('id' != $attr_name) $url .= '&cff-form-attr-'.$attr_name.'='.$attr_value;
}
if(empty($height)) $height = 500;
$url .= '&cff-form-height='.$height.'&non-amp=1';
add_action('amp_post_template_css', array($this, 'amp_css') );
add_filter( 'amp_post_template_data', array($this, 'amp_iframe') );
return '';
}
/**
* Includes the CSS rules for the amp version of form
*
* @param object, template.
*/
public function amp_css($template)
{
print '#cff-form-iframe{margin:0;}';
} // End amp_css
/**
* Checks if the amp-iframe.js was included, and includes it if not.
*
* @param $data, associative array.
* @return $data, associative array.
*/
public function amp_iframe($data)
{
if ( empty( $data['amp_component_scripts']['amp-iframe'] ) )
{
$data['amp_component_scripts']['amp-iframe'] = 'https://cdn.ampproject.org/v0/amp-iframe-0.1.js';
}
return $data;
} // End amp_iframe
/**
* Converts the URL parameters related with the form in the redirection process required for load the forms into the amp-frames
*
* The parameter cff-amp-form is converted in the id attribute,
* and the parameteres with the name: cff-form-attr-, are converted in the attributes
*
* @return array $attrs.
*/
private function _params_to_attrs()
{
$attrs = array();
if(!empty($_GET))
{
foreach($_GET as $param => $value)
{
if( $param == 'cff-amp-form')
$attrs['id'] = @intval($value);
elseif(preg_match('/^cff\-form\-attr\-/i', $param))
{
$param = preg_replace('/^cff\-form\-attr\-/i', '', $param);
$param = sanitize_text_field($param);
$attrs[$param] = sanitize_text_field($value);
}
}
}
return $attrs;
} // End _params_to_attrs
/**
* Reads the form height from the URL parameter cff-form-height, returns 500 by default.
*
* @return int.
*/
private function _get_height()
{
return (!empty($_GET['cff-form-height']) && ($height=@intval($_GET['cff-form-height'])) !== 0 ) ? $height : 500;
}
}
}