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<?php if ( ! defined( 'ABSPATH' ) ) exit;

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/**

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* Class NF_Display_Preview

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final class NF_Display_Preview

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{

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protected $form_id = '';

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protected $_form_id = '';

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public function __construct()

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{

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if ( ! isset( $_GET['nf_preview_form'] ) ) return;

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$this->_form_id = WPN_Helper::sanitize_text_field($_GET['nf_preview_form']);

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add_action( 'pre_get_posts', array( $this, 'pre_get_posts' ) );

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add_filter('the_title', array( $this, 'the_title' ) );

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remove_filter( 'the_content', 'wpautop' );

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remove_filter( 'the_excerpt', 'wpautop' );

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add_filter('the_content', array( $this, 'the_content' ), 9001 );

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add_filter('get_the_excerpt', array( $this, 'the_content' ) );

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//switched from template_include to template redirect filter hook to work with block-based (FSE) themes

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add_filter('template_redirect', array( $this, 'template_include' ) );

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add_filter('post_thumbnail_html', array( $this, 'post_thumbnail_html' ) );

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}

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public function pre_get_posts( $query )

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{

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$query->set( 'posts_per_page', 1 );

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}

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/**

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* @return string

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function the_title( $title )

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{

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if( ! in_the_loop() ) return $title;

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$form_title = Ninja_Forms()->form( $this->_form_id )->get()->get_setting( 'title' );

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return esc_html( $form_title ) . " " . esc_html__( 'Preview', 'ninja-forms' );

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}

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/**

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* @return string

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function the_content()

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{

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if ( ! is_user_logged_in() ) return esc_html__( 'You must be logged in to preview a form.', 'ninja-forms' );

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// takes into account if we are trying to preview a non-published form

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$tmp_id_test = explode( '-', $this->_form_id );

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// if only 1 element, then is it numeric

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if( 1 === count( $tmp_id_test) && ! is_numeric( $tmp_id_test[ 0 ] ) ) {

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return esc_html__( 'You must provide a valid form ID.', 'ninja-forms' );

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}

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// if 2 array elements, is the first equal to 'tmp' and the second numeric

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elseif ( ( 2 === count( $tmp_id_test )

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&& ('tmp' != $tmp_id_test[ 0 ]

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|| ! is_numeric( $tmp_id_test[ 1 ] ) ) ) ) {

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return esc_html__( 'You must provide a valid form ID.', 'ninja-forms' );

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}

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return do_shortcode( "[nf_preview id='". esc_attr($this->_form_id) . "']" );

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}

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/**

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* Locate_template will be loaded using second argument of the get_query_templates() function

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* First argument will be prefixed with _template to create a hook

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* @return void

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function template_include()

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{

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$templates = array( 'page.php', 'single.php', 'index.php');

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include( get_query_template('ninja-forms', $templates) );

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exit;

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}

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function post_thumbnail_html() {

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return '';

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}

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} // END CLASS NF_Display_Preview

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