gnu-social/plugins/AnonymousFave/Fave_tally.php

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<?php
/**
* Data class for favorites talley
*
* PHP version 5
*
* @category Data
* @package StatusNet
* @author Zach Copley <zach@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 favorites tally
*
* A class representing a total number of times a notice has been favored
*
* @category Action
* @package StatusNet
* @author Zach Copley <zach@status.net>
* @license http://www.fsf.org/licensing/licenses/agpl.html AGPLv3
* @link http://status.net/
*/
class Fave_tally extends Managed_DataObject
{
###START_AUTOCODE
/* the code below is auto generated do not remove the above tag */
public $__table = 'fave_tally'; // table name
public $notice_id; // int(4) primary_key not_null
public $count; // int(4) not_null
public $modified; // datetime not_null default_0000-00-00%2000%3A00%3A00
/* the code above is auto generated do not remove the tag below */
###END_AUTOCODE
/**
* return table definition for DB_DataObject
*
* @return array array of column definitions
*/
function table()
{
return array(
'notice_id' => DB_DATAOBJECT_INT + DB_DATAOBJECT_NOTNULL,
'count' => DB_DATAOBJECT_INT + DB_DATAOBJECT_NOTNULL,
'modified' => DB_DATAOBJECT_STR + DB_DATAOBJECT_DATE + DB_DATAOBJECT_TIME + DB_DATAOBJECT_NOTNULL
);
}
/**
* return key definitions for DB_DataObject
*
* DB_DataObject needs to know about keys that the table has, since it
* won't appear in StatusNet's own keys list. In most cases, this will
* simply reference your keyTypes() function.
*
* @return array list of key field names
*/
function keys()
{
return array_keys($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('notice_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 notice's tally
*
* @param integer $noticeID ID of notice we're tallying
*
* @return Fave_tally $tally the tally data object
*/
static function increment($noticeID)
{
$tally = Fave_tally::ensureTally($noticeID);
$orig = clone($tally);
$tally->count++;
$result = $tally->update($orig);
if (!$result) {
$msg = sprintf(
// TRANS: Server exception.
// TRANS: %d is the notice ID (number).
2011-04-06 14:08:39 +01:00
_m("Could not update favorite tally for notice ID %d."),
$noticeID
);
throw new ServerException($msg);
}
return $tally;
}
/**
* Decrement a notice's tally
*
* @param integer $noticeID ID of notice we're tallying
*
* @return Fave_tally $tally the tally data object
*/
static function decrement($noticeID)
{
$tally = Fave_tally::ensureTally($noticeID);
if ($tally->count > 0) {
$orig = clone($tally);
$tally->count--;
$result = $tally->update($orig);
if (!$result) {
$msg = sprintf(
// TRANS: Server exception.
// TRANS: %d is the notice ID (number).
2011-04-06 14:08:39 +01:00
_m("Could not update favorite tally for notice ID %d."),
$noticeID
);
throw new ServerException($msg);
}
}
return $tally;
}
/**
* Ensure a tally exists for a given notice. If we can't find
* one create one with the total number of existing faves
*
* @param integer $noticeID
*
* @return Fave_tally the tally data object
*/
static function ensureTally($noticeID)
{
$tally = Fave_tally::getKV('notice_id', $noticeID);
if (!$tally) {
$tally = new Fave_tally();
$tally->notice_id = $noticeID;
$tally->count = Fave_tally::countExistingFaves($noticeID);
$result = $tally->insert();
if (!$result) {
$msg = sprintf(
// TRANS: Server exception.
// TRANS: %d is the notice ID (number).
2011-04-06 14:08:39 +01:00
_m("Could not create favorite tally for notice ID %d."),
$noticeID
);
throw new ServerException($msg);
}
}
return $tally;
}
/**
* Count the number of faves a notice already has. Used to initalize
* a tally for a notice.
*
* @param integer $noticeID ID of the notice to count faves for
*
* @return integer $total total number of time the notice has been favored
*/
static function countExistingFaves($noticeID)
{
$fave = new Fave();
$fave->notice_id = $noticeID;
$total = $fave->count();
return $total;
}
}