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administrator/components/com_users/models/groups.php

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+<?php
+/**
+ * @package     Joomla.Administrator
+ * @subpackage  com_users
+ *
+ * @copyright   Copyright (C) 2005 - 2013 Open Source Matters, Inc. All rights reserved.
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+defined('_JEXEC') or die;
+
+/**
+ * Methods supporting a list of user group records.
+ *
+ * @package     Joomla.Administrator
+ * @subpackage  com_users
+ * @since       1.6
+ */
+class UsersModelGroups extends JModelList
+{
+	/**
+	 * Constructor.
+	 *
+	 * @param   array  An optional associative array of configuration settings.
+	 * @see     JController
+	 * @since   1.6
+	 */
+	public function __construct($config = array())
+	{
+		if (empty($config['filter_fields']))
+		{
+			$config['filter_fields'] = array(
+				'id', 'a.id',
+				'parent_id', 'a.parent_id',
+				'title', 'a.title',
+				'lft', 'a.lft',
+				'rgt', 'a.rgt',
+			);
+		}
+
+		parent::__construct($config);
+	}
+
+	/**
+	 * Method to auto-populate the model state.
+	 *
+	 * Note. Calling getState in this method will result in recursion.
+	 *
+	 * @since   1.6
+	 */
+	protected function populateState($ordering = null, $direction = null)
+	{
+		// Load the filter state.
+		$search = $this->getUserStateFromRequest($this->context . '.filter.search', 'filter_search');
+		$this->setState('filter.search', $search);
+
+		// Load the parameters.
+		$params = JComponentHelper::getParams('com_users');
+		$this->setState('params', $params);
+
+		// List state information.
+		parent::populateState('a.lft', 'asc');
+	}
+
+	/**
+	 * Method to get a store id based on model configuration state.
+	 *
+	 * This is necessary because the model is used by the component and
+	 * different modules that might need different sets of data or different
+	 * ordering requirements.
+	 *
+	 * @param   string  $id    A prefix for the store id.
+	 *
+	 * @return  string  A store id.
+	 */
+	protected function getStoreId($id = '')
+	{
+		// Compile the store id.
+		$id .= ':' . $this->getState('filter.search');
+		$id .= ':' . $this->getState('filter.search');
+
+		return parent::getStoreId($id);
+	}
+
+	/**
+	 * Gets the list of groups and adds expensive joins to the result set.
+	 *
+	 * @return  mixed  An array of data items on success, false on failure.
+	 * @since   1.6
+	 */
+	public function getItems()
+	{
+		$db = $this->getDbo();
+		// Get a storage key.
+		$store = $this->getStoreId();
+
+		// Try to load the data from internal storage.
+		if (empty($this->cache[$store]))
+		{
+			$items = parent::getItems();
+
+			// Bail out on an error or empty list.
+			if (empty($items))
+			{
+				$this->cache[$store] = $items;
+
+				return $items;
+			}
+
+			// First pass: get list of the group id's and reset the counts.
+			$groupIds = array();
+			foreach ($items as $item)
+			{
+				$groupIds[] = (int) $item->id;
+				$item->user_count = 0;
+			}
+
+			// Get the counts from the database only for the users in the list.
+			$query = $db->getQuery(true);
+
+			// Count the objects in the user group.
+			$query->select('map.group_id, COUNT(DISTINCT map.user_id) AS user_count')
+				->from($db->quoteName('#__user_usergroup_map') . ' AS map')
+				->where('map.group_id IN (' . implode(',', $groupIds) . ')')
+				->group('map.group_id');
+
+			$db->setQuery($query);
+
+			// Load the counts into an array indexed on the user id field.
+			try
+			{
+				$users = $db->loadObjectList('group_id');
+			}
+			catch (RuntimeException $e)
+			{
+				$this->setError($e->getMessage);
+				return false;
+			}
+
+			// Second pass: collect the group counts into the master items array.
+			foreach ($items as &$item)
+			{
+				if (isset($users[$item->id]))
+				{
+					$item->user_count = $users[$item->id]->user_count;
+				}
+			}
+
+			// Add the items to the internal cache.
+			$this->cache[$store] = $items;
+		}
+
+		return $this->cache[$store];
+	}
+
+	/**
+	 * Build an SQL query to load the list data.
+	 *
+	 * @return  JDatabaseQuery
+	 */
+	protected function getListQuery()
+	{
+		// Create a new query object.
+		$db = $this->getDbo();
+		$query = $db->getQuery(true);
+
+		// Select the required fields from the table.
+		$query->select(
+			$this->getState(
+				'list.select',
+				'a.*'
+			)
+		);
+		$query->from($db->quoteName('#__usergroups') . ' AS a');
+
+		// Add the level in the tree.
+		$query->select('COUNT(DISTINCT c2.id) AS level')
+			->join('LEFT OUTER', $db->quoteName('#__usergroups') . ' AS c2 ON a.lft > c2.lft AND a.rgt < c2.rgt')
+			->group('a.id, a.lft, a.rgt, a.parent_id, a.title');
+
+		// Filter the comments over the search string if set.
+		$search = $this->getState('filter.search');
+		if (!empty($search))
+		{
+			if (stripos($search, 'id:') === 0)
+			{
+				$query->where('a.id = ' . (int) substr($search, 3));
+			}
+			else
+			{
+				$search = $db->quote('%' . $db->escape($search, true) . '%');
+				$query->where('a.title LIKE ' . $search);
+			}
+		}
+
+		// Add the list ordering clause.
+		$query->order($db->escape($this->getState('list.ordering', 'a.lft')) . ' ' . $db->escape($this->getState('list.direction', 'ASC')));
+
+		//echo nl2br(str_replace('#__','jos_',$query));
+		return $query;
+	}
+}