<?php
/**
* @brief Read/Unread Tracking Interface for Content Models
* @author <a href='https://www.invisioncommunity.com'>Invision Power Services, Inc.</a>
* @copyright (c) Invision Power Services, Inc.
* @license https://www.invisioncommunity.com/legal/standards/
* @package Invision Community
* @since 8 Jul 2013
*/
namespace IPS\Content;
/* To prevent PHP errors (extending class does not exist) revealing path */
if ( !defined( '\IPS\SUITE_UNIQUE_KEY' ) )
{
header( ( isset( $_SERVER['SERVER_PROTOCOL'] ) ? $_SERVER['SERVER_PROTOCOL'] : 'HTTP/1.0' ) . ' 403 Forbidden' );
exit;
}
/**
* Read/Unread Tracking Interface for Content Models
*
* @note Content classes will gain special functionality by implementing this interface
*/
interface ReadMarkers
{
/**
* The maximum number of IDs to store in core_item_markers.item_read_array
*
* As a JSON-encoded array of ID => Timestamp values, the storage required
* is (14+l)n + 1 bytes, where l is the length in bytes of any given ID and n is the number of IDs.
* We store the value in a MEDIUMTEXT field, so the maximum length is 16 megabytes. Assuming
* l is always 5 (NB: but it isn't), this means this constant could be increased to a theoretic
* maximum of 883,011.
*/
const STORAGE_CUTOFF = 100000;
}