bp_document_add_handler( array $documents = array(), string $privacy = 'public', string $content = '', int $group_id = false, int $folder_id = false )

function bp_document_add_handler( $documents = array() ) {
	global $bp_document_upload_count;
	$document_ids = array();

	if ( ! is_user_logged_in() ) {
		return false;
	}

	if ( empty( $documents ) && ! empty( $_POST['document'] ) ) {
		$documents = $_POST['document'];
	}

	$privacy = ! empty( $_POST['privacy'] ) && in_array( $_POST['privacy'], array_keys( bp_document_get_visibility_levels() ) ) ? $_POST['privacy'] : 'public';

	if ( ! empty( $documents ) && is_array( $documents ) ) {

		// update count of documents for later use.
		$bp_document_upload_count = count( $documents );

		// save  document.
		foreach ( $documents as $document ) {

			$attachment_data = get_post( $document['id'] );
			$file            = get_attached_file( $document['id'] );
			$file_type       = wp_check_filetype( $file );
			$file_name       = basename( $file );

			$document_id = bp_document_add(
				array(
					'attachment_id' => $document['id'],
					'title'         => $document['name'],
					'folder_id'     => ! empty( $document['folder_id'] ) ? $document['folder_id'] : false,
					'group_id'      => ! empty( $document['group_id'] ) ? $document['group_id'] : false,
					'privacy'       => ! empty( $document['privacy'] ) && in_array( $document['privacy'], array_merge( array_keys( bp_document_get_visibility_levels() ), array( 'message' ) ) ) ? $document['privacy'] : $privacy,
					'menu_order'    => ! empty( $document['menu_order'] ) ? $document['menu_order'] : 0,
					'error_type'    => 'wp_error',
				)
			);

			if ( ! empty( $document_id ) && ! is_wp_error( $document_id ) ) {
				bp_document_update_meta( $document_id, 'file_name', $file_name );
				bp_document_update_meta( $document_id, 'extension', '.' . $file_type['ext'] );
			}

			if ( $document_id ) {
				$document_ids[] = $document_id;
			}
		}
	}

	/**
	 * Fires at the end of the execution of adding saving a document item, before returning the new document items in ajax response.
	 *
	 * @param array $document_ids document IDs.
	 * @param array $documents    Array of document from POST object or in function parameter.
	 *
	 * @since BuddyBoss 1.4.0
	 */
	return apply_filters( 'bp_document_add_handler', $document_ids, (array) $documents );
}