bp_activity_document_add( $document )

function bp_activity_document_add( $document ) {
	global $bp_document_upload_count, $bp_new_activity_comment;

	if ( ! empty( $document ) ) {

		$parent_activity_id = false;
		if ( isset( $_POST['bp_activity_update'] ) && isset( $_POST['bp_activity_id'] ) ) {
			$parent_activity_id = (int) $_POST['bp_activity_id'];
		}

		if ( $bp_document_upload_count > 1 || ! empty( $bp_new_activity_comment ) ) {

			if ( bp_is_active( 'groups' ) && ! empty( $bp_new_activity_comment ) && empty( $document->group_id ) ) {
				$comment = new BP_Activity_Activity( $bp_new_activity_comment );

				if ( ! empty( $comment->item_id ) ) {
					$comment_activity = new BP_Activity_Activity( $comment->item_id );
					if ( ! empty( $comment_activity->component ) && buddypress()->groups->id === $comment_activity->component ) {
						$document->group_id = $comment_activity->item_id;
						$document->privacy = 'grouponly';
					}
				}
			}

			$args = array(
				'hide_sitewide' => true,
				'privacy'       => 'document',
			);

			if ( ! empty( $document->group_id ) && bp_is_active( 'groups' ) ) {
				$args['item_id'] = $document->group_id;
				$args['type']    = 'activity_update';
				$current_group   = groups_get_group( $document->group_id );
				$args['action']  = sprintf( __( '%1$s posted an update in the group %2$s', 'buddyboss' ), bp_core_get_userlink( $document->user_id ), '<a href="' . bp_get_group_permalink( $current_group ) . '">' . esc_attr( $current_group->name ) . '</a>' );
				$activity_id     = groups_record_activity( $args );
			} else {
				$activity_id = bp_activity_post_update( $args );
			}

			if ( $activity_id ) {

				// save document activity id in document.
				$document->activity_id = $activity_id;
				$document->save();

				// update activity meta.
				bp_activity_update_meta( $activity_id, 'bp_document_activity', '1' );

				// save attachment meta for activity.
				update_post_meta( $document->attachment_id, 'bp_document_activity_id', $activity_id );

				if ( ! empty( $parent_activity_id ) ) {

					$document_activity = new BP_Activity_Activity( $activity_id );
					$document_activity->secondary_item_id = $parent_activity_id;
					$document_activity->save();

					// save parent activity id in attachment meta.
					update_post_meta( $document->attachment_id, 'bp_document_parent_activity_id', $parent_activity_id );
				}
			}
		} else {
			if ( $parent_activity_id ) {

				//save document activity id
				$document->activity_id = $parent_activity_id;
				$document->save();

				//save parent activity id in attachment meta
				update_post_meta( $document->attachment_id, 'bp_document_parent_activity_id', $parent_activity_id );
			}
		}
	}
}