<?php
/**
 * This class is responsible to model plain ads.
 *
 * @package AdvancedAds
 * @author  Advanced Ads <info@wpadvancedads.com>
 * @since   1.48.0
 */

namespace AdvancedAds\Ads;

use AdvancedAds\Abstracts\Ad;
use AdvancedAds\Utilities\WordPress;
use AdvancedAds\Utilities\Conditional;
use AdvancedAds\Interfaces\Ad_Interface;

defined( 'ABSPATH' ) || exit;

/**
 * Plain ad.
 */
class Ad_Plain extends Ad implements Ad_Interface {

	/**
	 * Prepare output for frontend.
	 *
	 * @return string
	 */
	public function prepare_frontend_output(): string {
		$content = $this->get_content();

		// Evaluate the code as PHP if setting was never saved or is allowed.
		if ( $this->is_php_allowed() && Conditional::is_php_allowed() ) {
			ob_start();
			// phpcs:ignore Squiz.PHP.Eval.Discouraged -- this is specifically eval'd so allow eval here.
			eval( '?>' . $content );
			$content = ob_get_clean();
		}

		if ( ! is_string( $content ) ) {
			return '';
		}

		/**
		 * Apply do_blocks if the content has block code
		 * works with WP 5.0.0 and later
		 */
		if ( function_exists( 'has_blocks' ) && has_blocks( $content ) ) {
			$content = do_blocks( $content );
		}

		if ( $this->is_shortcode_allowed() ) {
			$content = $this->do_shortcode( $content );
		}

		// Add 'loading' attribute if applicable, available from WP 5.5.
		if (
			function_exists( 'wp_lazy_loading_enabled' )
			&& wp_lazy_loading_enabled( 'img', 'the_content' )
			&& preg_match_all( '/<img\s[^>]+>/', $content, $matches )
		) {
			foreach ( $matches[0] as $image ) {
				if ( strpos( $image, 'loading=' ) !== false ) {
					continue;
				}

				// Optimize image HTML tag with loading attributes based on WordPress filter context.
				$content = str_replace( $image, WordPress::img_tag_add_loading_attr( $image, 'the_content' ), $content );
			}
		}

		return (
			(
				( defined( 'DISALLOW_UNFILTERED_HTML' ) && DISALLOW_UNFILTERED_HTML ) ||
				! Conditional::can_author_unfiltered_html( (int) get_post_field( 'post_author', $this->get_id() ) )
			)
			&& version_compare( $this->get_prop( 'last_save_version' ) ?? '0', '1.35.0', 'ge' )
		)
			? wp_kses_post( $content )
			: $content;
	}
}