Add wiki activities in BuddyPress activities

mu-plugin.php

<?php

add_action( 'save_post', 'add_wiki_activity_to_bp' );
function add_wiki_activity_to_bp( $post_id ) {
	if( get_post_type( $post_id ) == 'incsub_wiki' ) {
		
		if ( ! function_exists( 'bp_activity_add' ) ) return false;
		
		$user_id = get_current_user_id();
		$user_info = get_userdata( $user_id );
		$post = get_post( $post_id );
		
		if( ( $_POST['post_status'] == 'publish' ) && ( $_POST['original_post_status'] != 'publish' ) ) {
			bp_activity_add( array(
			'user_id' => $user_id,
			'action' => bp_core_get_userlink( $user_id ) . ' has published <a href="' . get_permalink( $post->ID ) . '">' . $post->post_title . '</a>',
			'component' => 'profile',
			'type' => 'created_wiki'
			) );
		}elseif( ( $_POST['post_status'] == 'publish' ) ) {
			bp_activity_add( array(
			'user_id' => $user_id,
			'action' => bp_core_get_userlink( $user_id ) . ' has edited <a href="' . get_permalink( $post->ID ) . '">' . $post->post_title . '</a>',
			'component' => 'profile',
			'type' => 'created_wiki'
			) );
		}
	}
}