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<?php
/**
* Data class for counting greetings
*
* 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) 2009, 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 greetings
*
* We use the DB_DataObject framework for data classes in StatusNet. Each
* table maps to a particular data class, making it easier to manipulate
* data.
*
* Data classes should extend Memcached_DataObject, the (slightly misnamed)
* extension of DB_DataObject that provides caching, internationalization,
* and other bits of good functionality to StatusNet-specific data classes.
*
* @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 User_greeting_count extends Memcached_DataObject
{
public $__table = 'user_greeting_count'; // table name
public $user_id; // int(4) primary_key not_null
public $greeting_count; // int(4)
/**
* 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 '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('User_greeting_count', $k, $v);
}
/**
* return table definition for DB_DataObject
*
* DB_DataObject needs to know something about the table to manipulate
* instances. This method provides all the DB_DataObject needs to know.
*
* @return array array of column definitions
*/
function table()
{
return array('user_id' => DB_DATAOBJECT_INT + DB_DATAOBJECT_NOTNULL,
'greeting_count' => DB_DATAOBJECT_INT);
}
/**
* return key definitions for DB_DataObject
*
* DB_DataObject needs to know about keys that the table has, since it
* won't appear in StatusNet's own keys list. In most cases, this will
* simply reference your keyTypes() function.
*
* @return array list of key field names
*/
function keys()
{
return array_keys($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');
}
/**
* 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);
}
/**
* Increment a user's greeting count and return instance
*
* This method handles the ins and outs of creating a new greeting_count for a
* user or fetching the existing greeting count and incrementing its value.
*
* @param integer $user_id ID of the user to get a count for
*
* @return User_greeting_count instance for this user, with count already incremented.
*/
static function inc($user_id)
{
$gc = User_greeting_count::staticGet('user_id', $user_id);
if (empty($gc)) {
$gc = new User_greeting_count();
$gc->user_id = $user_id;
$gc->greeting_count = 1;
$result = $gc->insert();
if (!$result) {
throw Exception(sprintf(_m("Could not save new greeting count for %d"),
$user_id));
}
} else {
$orig = clone($gc);
$gc->greeting_count++;
$result = $gc->update($orig);
if (!$result) {
throw Exception(sprintf(_m("Could not increment greeting count for %d"),
$user_id));
}
}
return $gc;
}
}
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