bp_nouveau_ajax_mark_activity_favorite()

function bp_nouveau_ajax_mark_activity_favorite() {
	if ( ! bp_is_post_request() ) {
		wp_send_json_error();
	}

	// Nonce check!
	if ( empty( $_POST['nonce'] ) || ! wp_verify_nonce( $_POST['nonce'], 'bp_nouveau_activity' ) ) {
		wp_send_json_error();
	}

	if ( bp_activity_add_user_favorite( $_POST['id'] ) ) {
		$response = array(
			'content'    => __( 'Unlike', 'buddyboss' ),
			'like_count' => bp_activity_get_favorite_users_string( $_POST['id'] ),
			'tooltip'    => bp_activity_get_favorite_users_tooltip_string( $_POST['id'] )
		); // here like_count is for activity total like count

		if ( ! bp_is_user() ) {
			$fav_count = (int) bp_get_total_favorite_count_for_user( bp_loggedin_user_id() );

			if ( 1 === $fav_count ) {
				$response['directory_tab'] = '<li id="activity-favorites" data-bp-scope="favorites" data-bp-object="activity">
					<a href="' . bp_loggedin_user_domain() . bp_get_activity_slug() . '/favorites/">
						' . esc_html__( 'Liked', 'buddyboss' ) . '
					</a>
				</li>';
			} else {
				$response['fav_count'] = $fav_count;
			}
		}

		wp_send_json_success( $response );
	} else {
		wp_send_json_error();
	}
}