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<?php if ( ! defined( 'ABSPATH' ) ) exit;
/**
* Class NF_Display_Preview
*/
final class NF_Display_Preview
{
protected $form_id = '';
public function __construct()
{
if ( ! isset( $_GET['nf_preview_form'] ) ) return;
$this->_form_id = WPN_Helper::sanitize_text_field($_GET['nf_preview_form']);
add_action( 'pre_get_posts', array( $this, 'pre_get_posts' ) );
add_filter('the_title', array( $this, 'the_title' ) );
remove_filter( 'the_content', 'wpautop' );
remove_filter( 'the_excerpt', 'wpautop' );
add_filter('the_content', array( $this, 'the_content' ), 9001 );
add_filter('get_the_excerpt', array( $this, 'the_content' ) );
/**
* Since wp_is_block_theme was only added in Wordpress 5.9,
* we need to verify it exists before calling it.
*/
if( ! function_exists('wp_is_block_theme') || ! wp_is_block_theme() ){
add_filter('template_include', array( $this, 'template_include' ) );
}
add_filter('post_thumbnail_html', array( $this, 'post_thumbnail_html' ) );
}
public function pre_get_posts( $query )
{
$query->set( 'posts_per_page', 1 );
}
/**
* @return string
*/
function the_title( $title )
{
if( ! in_the_loop() ) return $title;
$form_title = Ninja_Forms()->form( $this->_form_id )->get()->get_setting( 'title' );
return esc_html( $form_title ) . " " . esc_html__( 'Preview', 'ninja-forms' );
}
/**
* @return string
*/
function the_content()
{
if ( ! is_user_logged_in() ) return esc_html__( 'You must be logged in to preview a form.', 'ninja-forms' );
// takes into account if we are trying to preview a non-published form
$tmp_id_test = explode( '-', $this->_form_id );
// if only 1 element, then is it numeric
if( 1 === count( $tmp_id_test) && ! is_numeric( $tmp_id_test[ 0 ] ) ) {
return esc_html__( 'You must provide a valid form ID.', 'ninja-forms' );
}
// if 2 array elements, is the first equal to 'tmp' and the second numeric
elseif ( ( 2 === count( $tmp_id_test )
&& ('tmp' != $tmp_id_test[ 0 ]
|| ! is_numeric( $tmp_id_test[ 1 ] ) ) ) ) {
return esc_html__( 'You must provide a valid form ID.', 'ninja-forms' );
}
return do_shortcode( "[nf_preview id='{$this->_form_id}']" );
}
/**
* @return string
*/
function template_include()
{
return locate_template( array( 'page.php', 'single.php', 'index.php' ) );
}
function post_thumbnail_html() {
return '';
}
} // END CLASS NF_Display_Preview