<?php // phpcs:ignore

namespace SEOPress\Services\Metas;

/**
 * GetImageInContent
 */
class GetImageInContent {

	/**
	 * The getThumbnailInContentByPostId function.
	 *
	 * @param int $post_id The post id.
	 *
	 * @return string
	 */
	public function getThumbnailInContentByPostId( $post_id ) { // phpcs:ignore -- TODO: check if method is outside this class before renaming.
		// Get post content.
		$content = get_post_field( 'post_content', $post_id );

		if ( empty( $content ) ) {
			return;
		}

		// DomDocument.
		$dom             = new \DOMDocument();
		$internal_errors = libxml_use_internal_errors( true );

		$dom->loadHTML( '<?xml encoding="utf-8" ?>' . $content );

		$dom->preserveWhiteSpace = false; //phpcs:ignore
		if ( '' !== $dom->getElementsByTagName( 'img' ) ) {
			$images = $dom->getElementsByTagName( 'img' );
		}

		if ( isset( $images ) && ! empty( $images ) ) {
			if ( $images->length >= 1 ) {
				foreach ( $images as $img ) {
					$url = $img->getAttribute( 'src' );
					// Exclude Base64 img.
					if ( false === strpos( $url, 'data:image/' ) ) {
						if ( true === seopress_is_absolute( $url ) ) { //phpcs:ignore
							// Do nothing.
						} else {
							$url = get_home_url() . $url;
						}
						// Cleaning url.
						$url = htmlspecialchars( esc_attr( wp_filter_nohtml_kses( $url ) ) );

						// Remove query strings.
						$parse_url = wp_parse_url( $url );

						if ( ! empty( $parse_url['scheme'] ) && ! empty( $parse_url['host'] ) && ! empty( $parse_url['path'] ) ) {
							return $parse_url['scheme'] . '://' . $parse_url['host'] . $parse_url['path'];
						} else {
							return $url;
						}
					}
				}
			}
		}
		libxml_use_internal_errors( $internal_errors );
	}
}