<?php
/**
 * Data class for counting notice postings by date
 *
 * PHP version 5
 *
 * @category Data
 * @package  StatusNet
 * @author   Evan Prodromou <evan@status.net>
 * @license  http://www.fsf.org/licensing/licenses/agpl.html AGPLv3
 * @link     http://status.net/
 *
 * StatusNet - the distributed open-source microblogging tool
 * Copyright (C) 2010, StatusNet, Inc.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.     See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

if (!defined('STATUSNET')) {
    exit(1);
}

require_once INSTALLDIR . '/classes/Memcached_DataObject.php';

/**
 * Data class for counting notices by date
 *
 * We make a separate sitemap for each notice posted by date.
 * To save ourselves some (not inconsiderable) processing effort,
 * we cache this data in the sitemap_notice_count table. Each
 * row represents a day since the site has been started, with a count
 * of notices posted on that day. Since, after the end of the day,
 * this number doesn't change, it's a good candidate for persistent caching.
 *
 * @category Data
 * @package  StatusNet
 * @author   Evan Prodromou <evan@status.net>
 * @license  http://www.fsf.org/licensing/licenses/agpl.html AGPLv3
 * @link     http://status.net/
 *
 * @see      DB_DataObject
 */

class Sitemap_notice_count extends Memcached_DataObject
{
    public $__table = 'sitemap_notice_count'; // table name

    public $notice_date;                       // date primary_key not_null
    public $notice_count;                      // int(4)
    public $created;
    public $modified;

    /**
     * Get an instance by key
     *
     * This is a utility method to get a single instance with a given key value.
     *
     * @param string $k Key to use to lookup (usually 'notice_id' for this class)
     * @param mixed  $v Value to lookup
     *
     * @return Sitemap_notice_count object found, or null for no hits
     *
     */

    function staticGet($k, $v=null)
    {
        return Memcached_DataObject::staticGet('Sitemap_notice_count', $k, $v);
    }

    /**
     * return table definition for DB_DataObject
     *
     * DB_DataObject needs to know something about the table to manipulate
     * instances. This method provides all the DB_DataObject needs to know.
     *
     * @return array array of column definitions
     */

    function table()
    {
        return array('notice_date' => DB_DATAOBJECT_DATE + DB_DATAOBJECT_NOTNULL,
                     'notice_count' => DB_DATAOBJECT_INT,
                     'created'   => DB_DATAOBJECT_STR + DB_DATAOBJECT_DATE + DB_DATAOBJECT_TIME + DB_DATAOBJECT_NOTNULL,
                     'modified'  => DB_DATAOBJECT_STR + DB_DATAOBJECT_DATE + DB_DATAOBJECT_TIME + DB_DATAOBJECT_NOTNULL);
    }

    /**
     * return key definitions for DB_DataObject
     *
     * DB_DataObject needs to know about keys that the table has; this function
     * defines them.
     *
     * @return array key definitions
     */

    function keys()
    {
        return array('notice_date' => 'K');
    }

    /**
     * return key definitions for Memcached_DataObject
     *
     * Our caching system uses the same key definitions, but uses a different
     * method to get them.
     *
     * @return array key definitions
     */

    function keyTypes()
    {
        return $this->keys();
    }
}