JNews || Custom Meta for Video Format Post or have a Video in the Post Content

/**
 * JNEWS || START CUSTOMIZATION
 *
 * Add video icon to meta for video format
 * We use DOMDocument to safely manipulate the HTML output of the meta, and add a video icon if the post format is video or have a video in the post content.
 * This way we don't have to override the entire meta rendering function, and we can keep compatibility with future updates of the theme.
 * We hook into the filters for the meta output of the modules, and modify the output if
 * the post is a video format or contains a video. The function will check the post format and also inspect the post content for common video indicators (blocks, shortcodes, tags, embeds).
 * The code will look for the element with class "jeg_post_meta" and append a new div with class "jeg_meta_video" and a video camera icon inside it.
 * You can customize the HTML inside the fragment to change the icon or add more information.
 * Note: This code assumes that the meta output contains an element with class "jeg_post_meta". If the theme changes the structure of the meta output, this code may need to be updated accordingly.
 */

add_filter( 'jnews_module_post_meta_1', 'jnews_custom_meta_for_video_format', 10, 3 );
add_filter( 'jnews_module_post_meta_2', 'jnews_custom_meta_for_video_format', 10, 3 );
add_filter( 'jnews_module_post_meta_3', 'jnews_custom_meta_for_video_format', 10, 3 );

/**
 * Check whether a post or content contains a video.
 * Accepts a `WP_Post`, `WP_Query`, post ID, or a raw content string.
 * Returns bool.
 */
function jnews_post_has_video( $post_or_content ) {
    // resolve content string
    $content = '';

    if ( $post_or_content instanceof WP_Query ) {
        $post_obj = $post_or_content->post ?: ( ! empty( $post_or_content->posts ) ? $post_or_content->posts[0] : null );
        $content = $post_obj ? $post_obj->post_content : '';
    } elseif ( $post_or_content instanceof WP_Post ) {
        $content = isset( $post_or_content->post_content ) ? $post_or_content->post_content : '';
    } elseif ( is_numeric( $post_or_content ) ) {
        $content = get_post_field( 'post_content', (int) $post_or_content );
    } else {
        $content = (string) $post_or_content;
    }

    if ( ! $content ) {
        return false;
    }

    // 1) Gutenberg core/video block
    if ( function_exists( 'has_block' ) && has_block( 'core/video', $content ) ) {
        return true;
    }

    // 2) Serialized block comment or wp-block video markup
    if ( strpos( $content, '<!-- wp:video' ) !== false || strpos( $content, 'wp-block-video' ) !== false ) {
        return true;
    }

    // 3) native HTML <video> tag
    if ( preg_match( '#<video\b#i', $content ) ) {
        return true;
    }

    // 4) video shortcode [video]
    if ( function_exists( 'has_shortcode' ) && has_shortcode( $content, 'video' ) ) {
        return true;
    }

    // 5) common iframe embeds (YouTube, Vimeo, Dailymotion, Wistia)
    if ( preg_match( '#<iframe[^>]+(youtube|youtube-nocookie|vimeo|dailymotion|wistia|player.vimeo)#i', $content ) ) {
        return true;
    }

    return false;
}

/**
 * Add custom meta for video format
 *
 * @param string $output
 * @param \WP_Post|\WP_Query $post
 * @param \JNews\Module\ModuleViewAbstract $instance
 *
 * @return string
 */
function jnews_custom_meta_for_video_format( $output, $post, $instance ) {
    // normalize $post into a WP_Post object when possible
    $post_obj = null;
    if ( $post instanceof WP_Query ) {
        $post_obj = $post->post ?: ( ! empty( $post->posts ) ? $post->posts[0] : null );
    } elseif ( is_object( $post ) && isset( $post->ID ) ) {
        $post_obj = $post;
    } elseif ( is_numeric( $post ) ) {
        $post_obj = get_post( (int) $post );
    }

    if ( ! $post_obj ) {
        return $output;
    }

    // use WP post format check OR content inspection helper
    if ( has_post_format( 'video', $post_obj->ID ) || jnews_post_has_video( $post_obj ) ) {
        libxml_use_internal_errors( true );
        $doc = new DOMDocument();

        // Load as HTML fragment without adding <html>/<body>
        $doc->loadHTML( '<?xml encoding="utf-8" ?>' . $output, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD );

        $xpath = new DOMXPath( $doc );
        // find first element with class "jeg_post_meta"
        $nodes = $xpath->query( "//*[contains(concat(' ', normalize-space(@class), ' '), ' jeg_post_meta ')]" );

        if ( $nodes->length ) {
            $meta = $nodes->item( 0 );

            // create a fragment for arbitrary HTML (safe insertion)
            $fragment = $doc->createDocumentFragment();
            // change the HTML below to whatever element you want to insert
            $fragment->appendXML( '<div class="jeg_meta_video"><i class="fa fa-video-camera"></i></div>' );

            $meta->appendChild( $fragment );
        }

        // export modified HTML (will return the fragment/document)
        $output = $doc->saveHTML();
        libxml_clear_errors();
    }

    return $output;
}

/**
 * JNEWS || END CUSTOMIZATION
 */