[ticket/11495] Move classes to tree/ as they all implement a tree

PHPBB3-11495

phpBB/includes/tree/nestedset_forum.php

@@ -0,0 +1,52 @@
+<?php
+/**
+*
+* @package Tree - Nested Set Forum
+* @copyright (c) 2013 phpBB Group
+* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+*
+*/
+
+/**
+* @ignore
+*/
+if (!defined('IN_PHPBB'))
+{
+	exit;
+}
+
+class phpbb_tree_nestedset_forum extends phpbb_tree_nestedset
+{
+	/**
+	* Column names in the table
+	* @var string
+	*/
+	protected $column_item_id = 'forum_id';
+	protected $column_item_parents = 'forum_parents';
+
+	/**
+	* Prefix for the language keys returned by exceptions
+	* @var string
+	*/
+	protected $message_prefix = 'FORUM_NESTEDSET_';
+
+	/**
+	* List of item properties to be cached in $item_parents
+	* @var array
+	*/
+	protected $item_basic_data = array('forum_id', 'forum_name', 'forum_type');
+
+	/**
+	* Construct
+	*
+	* @param phpbb_db_driver	$db		Database connection
+	* @param phpbb_lock_db		$lock	Lock class used to lock the table when moving forums around
+	* @param string				$table_name		Table name
+	*/
+	public function __construct(phpbb_db_driver $db, phpbb_lock_db $lock, $table_name)
+	{
+		$this->db = $db;
+		$this->lock = $lock;
+		$this->table_name = $table_name;
+	}
+}