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<?php
/**
* Store last-touched ID for various timelines
*
* 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';
/**
* Store various timeline data
*
* We don't want to keep re-fetching the same statuses and direct messages from Twitter.
* So, we store the last ID we see from a timeline, and store it. Next time
* around, we use that ID in the since_id parameter.
*
* @category Action
* @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 Twitter_synch_status extends Memcached_DataObject
{
public $__table = 'twitter_synch_status'; // table name
public $user_id; // int(4) primary_key not_null
public $timeline; // varchar(255) primary_key not_null
public $last_id; // bigint not_null
public $created; // datetime not_null
/**
* Get an instance by key
*
* @param string $k Key to use to lookup (usually 'user_id' for this class)
* @param mixed $v Value to lookup
*
* @return User_greeting_count object found, or null for no hits
*
*/
function staticGet($k, $v=null)
{
return Memcached_DataObject::staticGet('Twitter_synch_status', $k, $v);
}
/**
* return table definition for DB_DataObject
*
* DB_DataObject needs to know something about the table to manipulate
* instances. This method provides all the DB_DataObject needs to know.
*
* @return array array of column definitions
*/
function table()
{
return array('user_id' => DB_DATAOBJECT_INT + DB_DATAOBJECT_NOTNULL,
'timeline' => DB_DATAOBJECT_STRING + DB_DATAOBJECT_NOTNULL,
'last_id' => DB_DATAOBJECT_INT + DB_DATAOBJECT_NOTNULL,
'created' => DB_DATAOBJECT_STR + DB_DATAOBJECT_DATE + DB_DATAOBJECT_TIME + DB_DATAOBJECT_NOTNULL
);
}
/**
* return key definitions for DB_DataObject
*
* DB_DataObject needs to know about keys that the table has, since it
* won't appear in StatusNet's own keys list. In most cases, this will
* simply reference your keyTypes() function.
*
* @return array list of key field names
*/
function keys()
{
return array_keys($this->keyTypes());
}
/**
* return key definitions for Memcached_DataObject
*
* Our caching system uses the same key definitions, but uses a different
* method to get them. This key information is used to store and clear
* cached data, so be sure to list any key that will be used for static
* lookups.
*
* @return array associative array of key definitions, field name to type:
* 'K' for primary key: for compound keys, add an entry for each component;
* 'U' for unique keys: compound keys are not well supported here.
*/
function keyTypes()
{
return array('user_id' => 'K',
'timeline' => 'K');
}
/**
* Magic formula for non-autoincrementing integer primary keys
*
* If a table has a single integer column as its primary key, DB_DataObject
* assumes that the column is auto-incrementing and makes a sequence table
* to do this incrementation. Since we don't need this for our class, we
* overload this method and return the magic formula that DB_DataObject needs.
*
* @return array magic three-false array that stops auto-incrementing.
*/
function sequenceKey()
{
return array(false, false, false);
}
static function getLastId($user_id, $timeline)
{
$tss = self::staticGet(array('user_id' => $user_id,
'timeline' => $timeline));
if (empty($tss)) {
return null;
} else {
return $tss->last_id;
}
}
static function setLastId($user_id, $timeline, $last_id)
{
$tss = self::staticGet(array('user_id' => $user_id,
'timeline' => $timeline));
if (empty($tss)) {
$tss = new Twitter_synch_status();
$tss->user_id = $user_id;
$tss->timeline = $timeline;
$tss->last_id = $last_id;
$tss->insert();
return true;
} else {
$orig = clone($tss);
$tss->last_id = $last_id;
$tss->update();
return true;
}
}
}
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