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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; this function
+ * defines them.
+ *
+ * @return array key definitions
+ */
+
+ function keys()
+ {
+ 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;
+ }
+}