og description for buddypress groups and activities

gistfile1.php

<?php 
add_action( 'wp_head', 'dtk_buddypress_og_data', 11 );
function dtk_buddypress_og_data(){
    if( bp_is_single_activity() ){
        if ( bp_has_activities( 'display_comments=threaded&show_hidden=true&include=' . bp_current_action() ) ){
            while ( bp_activities() ){ 
                bp_the_activity();
                $title = wp_strip_all_tags( bp_get_activity_action() );
                $content = wp_strip_all_tags( bp_get_activity_content_body() );
                $url = bp_activity_get_permalink( bp_get_activity_id() );
                $content = substr( $content, 0, 300 );
                ?>
                <meta property="og:type" content="article" />
                <meta property="og:title" content="<?php echo esc_attr( $title );?>" />
                <meta property="og:url" content="<?php echo $url;?>" />
                <meta property="og:description" content="<?php echo esc_attr( $content );?>" />
                <?php 
            }
        }
    }
    
    if( bp_is_group() ){
        if ( bp_has_groups() ){
            while ( bp_groups() ){
                bp_the_group();
                $title = wp_strip_all_tags( bp_get_group_name() );
                $content = wp_strip_all_tags( bp_get_group_description() );
                $url = bp_get_group_permalink();
                $content = substr( $content, 0, 300 );
                ?>
                <meta property="og:type" content="article" />
                <meta property="og:title" content="<?php echo esc_attr( $title );?>" />
                <meta property="og:url" content="<?php echo $url;?>" />
                <meta property="og:description" content="<?php echo esc_attr( $content );?>" />
                <?php 
                global $dit;
                $img_url = $dit['groups_types']->gtype_group_image_url(bp_get_group_id());
                if( $img_url ){
                    ?>
                    <meta property="og:image" content="<?php echo esc_attr( $img_url );?>" />
                    <?php 
                }
            }
        }
    }
}