3 * Data class for favorites talley
9 * @author Zach Copley <zach@status.net>
10 * @license http://www.fsf.org/licensing/licenses/agpl.html AGPLv3
11 * @link http://status.net/
13 * StatusNet - the distributed open-source microblogging tool
14 * Copyright (C) 2010, StatusNet, Inc.
16 * This program is free software: you can redistribute it and/or modify
17 * it under the terms of the GNU Affero General Public License as published by
18 * the Free Software Foundation, either version 3 of the License, or
19 * (at your option) any later version.
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU Affero General Public License for more details.
26 * You should have received a copy of the GNU Affero General Public License
27 * along with this program. If not, see <http://www.gnu.org/licenses/>.
30 if (!defined('STATUSNET')) {
34 require_once INSTALLDIR . '/classes/Memcached_DataObject.php';
37 * Data class for favorites tally
39 * A class representing a total number of times a notice has been favored
43 * @author Zach Copley <zach@status.net>
44 * @license http://www.fsf.org/licensing/licenses/agpl.html AGPLv3
45 * @link http://status.net/
47 class Fave_tally extends Managed_DataObject
50 /* the code below is auto generated do not remove the above tag */
52 public $__table = 'fave_tally'; // table name
53 public $notice_id; // int(4) primary_key not_null
54 public $count; // int(4) not_null
55 public $modified; // datetime not_null default_0000-00-00%2000%3A00%3A00
57 /* the code above is auto generated do not remove the tag below */
61 * return table definition for DB_DataObject
63 * @return array array of column definitions
69 'notice_id' => DB_DATAOBJECT_INT + DB_DATAOBJECT_NOTNULL,
70 'count' => DB_DATAOBJECT_INT + DB_DATAOBJECT_NOTNULL,
71 'modified' => DB_DATAOBJECT_STR + DB_DATAOBJECT_DATE + DB_DATAOBJECT_TIME + DB_DATAOBJECT_NOTNULL
76 * return key definitions for DB_DataObject
78 * DB_DataObject needs to know about keys that the table has, since it
79 * won't appear in StatusNet's own keys list. In most cases, this will
80 * simply reference your keyTypes() function.
82 * @return array list of key field names
86 return array_keys($this->keyTypes());
90 * return key definitions for Memcached_DataObject
92 * Our caching system uses the same key definitions, but uses a different
93 * method to get them. This key information is used to store and clear
94 * cached data, so be sure to list any key that will be used for static
97 * @return array associative array of key definitions, field name to type:
98 * 'K' for primary key: for compound keys, add an entry for each component;
99 * 'U' for unique keys: compound keys are not well supported here.
103 return array('notice_id' => 'K');
107 * Magic formula for non-autoincrementing integer primary keys
109 * If a table has a single integer column as its primary key, DB_DataObject
110 * assumes that the column is auto-incrementing and makes a sequence table
111 * to do this incrementation. Since we don't need this for our class, we
112 * overload this method and return the magic formula that DB_DataObject needs.
114 * @return array magic three-false array that stops auto-incrementing.
116 function sequenceKey()
118 return array(false, false, false);
122 * Increment a notice's tally
124 * @param integer $noticeID ID of notice we're tallying
126 * @return Fave_tally $tally the tally data object
128 static function increment($noticeID)
130 $tally = Fave_tally::ensureTally($noticeID);
132 $orig = clone($tally);
134 $result = $tally->update($orig);
138 // TRANS: Server exception.
139 // TRANS: %d is the notice ID (number).
140 _m("Could not update favorite tally for notice ID %d."),
143 throw new ServerException($msg);
150 * Decrement a notice's tally
152 * @param integer $noticeID ID of notice we're tallying
154 * @return Fave_tally $tally the tally data object
156 static function decrement($noticeID)
158 $tally = Fave_tally::ensureTally($noticeID);
160 if ($tally->count > 0) {
161 $orig = clone($tally);
163 $result = $tally->update($orig);
167 // TRANS: Server exception.
168 // TRANS: %d is the notice ID (number).
169 _m("Could not update favorite tally for notice ID %d."),
172 throw new ServerException($msg);
180 * Ensure a tally exists for a given notice. If we can't find
181 * one create one with the total number of existing faves
183 * @param integer $noticeID
185 * @return Fave_tally the tally data object
187 static function ensureTally($noticeID)
189 $tally = Fave_tally::getKV('notice_id', $noticeID);
192 $tally = new Fave_tally();
193 $tally->notice_id = $noticeID;
194 $tally->count = Fave_tally::countExistingFaves($noticeID);
195 $result = $tally->insert();
198 // TRANS: Server exception.
199 // TRANS: %d is the notice ID (number).
200 _m("Could not create favorite tally for notice ID %d."),
203 throw new ServerException($msg);
211 * Count the number of faves a notice already has. Used to initalize
212 * a tally for a notice.
214 * @param integer $noticeID ID of the notice to count faves for
216 * @return integer $total total number of time the notice has been favored
218 static function countExistingFaves($noticeID)
221 $fave->notice_id = $noticeID;
222 $total = $fave->count();