File "categories.php"
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<?php
/**
* @package Joomla.Platform
* @subpackage Application
*
* @copyright Copyright (C) 2005 - 2011 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE
*/
defined('JPATH_PLATFORM') or die;
/**
* JCategories Class.
*
* @package Joomla.Platform
* @subpackage Application
* @since 11.1
*/
class JCategories
{
/**
* Array to hold the object instances
*
* @var array
* @since 11.1
*/
static $instances = array();
/**
* Array of category nodes
*
* @var mixed
* @since 11.1
*/
protected $_nodes;
/**
* Array of checked categories -- used to save values when _nodes are null
*
* @var array
* @since 11.1
*/
protected $_checkedCategories;
/**
* Name of the extension the categories belong to
*
* @var string
* @since 11.1
*/
protected $_extension = null;
/**
* Name of the linked content table to get category content count
*
* @var string
* @since 11.1
*/
protected $_table = null;
/**
* Name of the category field
*
* @var string
* @since 11.1
*/
protected $_field = null;
/**
* Name of the key field
*
* @var string
* @since 11.1
*/
protected $_key = null;
/**
* Name of the items state field
*
* @var string
* @since 11.1
*/
protected $_statefield = null;
/**
* Array of options
*
* @var array
* @since 11.1
*/
protected $_options = null;
/**
* Class constructor
*
* @param array $options Array of options
*
* @return JCategories object
*
* @since 11.1
*/
public function __construct($options)
{
$this->_extension = $options['extension'];
$this->_table = $options['table'];
$this->_field = (isset($options['field'])&&$options['field'])?$options['field']:'catid';
$this->_key = (isset($options['key'])&&$options['key'])?$options['key']:'id';
$this->_statefield = (isset($options['statefield'])) ? $options['statefield'] : 'state';
$options['access'] = (isset($options['access'])) ? $options['access'] : 'true';
$options['published'] = (isset($options['published'])) ? $options['published'] : 1;
$this->_options = $options;
return true;
}
/**
* Returns a reference to a JCategories object
*
* @param string $extension Name of the categories extension
* @param array $options An array of options
*
* @return Jcategories Jcategories object
*
* @since 11.1
*/
public static function getInstance($extension, $options = array())
{
$hash = md5($extension.serialize($options));
if (isset(self::$instances[$hash])) {
return self::$instances[$hash];
}
$parts = explode('.', $extension);
$component = 'com_'.strtolower($parts[0]);
$section = count($parts) > 1 ? $parts[1] : '';
$classname = ucfirst(substr($component, 4)).ucfirst($section).'Categories';
if (!class_exists($classname)) {
$path = JPATH_SITE . '/components/' . $component . '/helpers/category.php';
if (is_file($path)) {
require_once $path;
}
else {
return false;
}
}
self::$instances[$hash] = new $classname($options);
return self::$instances[$hash];
}
/**
* Loads a specific category and all its children in a JCategoryNode object
*
* @param mixed $id an optional id integer or equal to 'root'
* @param boolean $forceload True to force the _load method to execute
*
* @return mixed JCategoryNode object or null if $id is not valid
*
* @since 11.1
*/
public function get($id = 'root', $forceload = false)
{
if ($id !== 'root') {
$id = (int) $id;
if ($id == 0) {
$id = 'root';
}
}
// If this $id has not been processed yet, execute the _load method
if ((!isset($this->_nodes[$id]) && !isset($this->_checkedCategories[$id])) || $forceload) {
$this->_load($id);
}
// If we already have a value in _nodes for this $id, then use it.
if (isset($this->_nodes[$id])) {
return $this->_nodes[$id];
}
// If we processed this $id already and it was not valid, then return null.
else if (isset($this->_checkedCategories[$id])) {
return null;
}
return false;
}
/**
* Load method
*
* @param integer $id Id of category to load
*
* @return void
*
* @since 11.1
*/
protected function _load($id)
{
$db = JFactory::getDbo();
$app = JFactory::getApplication();
$user = JFactory::getUser();
$extension = $this->_extension;
// Record that has this $id has been checked
$this->_checkedCategories[$id] = true;
$query = $db->getQuery(true);
// Right join with c for category
$query->select('c.*');
$query->select('CASE WHEN CHAR_LENGTH(c.alias) THEN CONCAT_WS(":", c.id, c.alias) ELSE c.id END as slug');
$query->from('#__categories as c');
$query->where('(c.extension='.$db->Quote($extension).' OR c.extension='.$db->Quote('system').')');
if ($this->_options['access']) {
$query->where('c.access IN ('.implode(',', $user->getAuthorisedViewLevels()).')');
}
if ($this->_options['published'] == 1) {
$query->where('c.published = 1');
}
$query->order('c.lft');
// s for selected id
if ($id!='root') {
// Get the selected category
$query->leftJoin('#__categories AS s ON (s.lft <= c.lft AND s.rgt >= c.rgt) OR (s.lft > c.lft AND s.rgt < c.rgt)');
$query->where('s.id='.(int)$id);
}
$subQuery = ' (SELECT cat.id as id FROM #__categories AS cat JOIN #__categories AS parent ' .
'ON cat.lft BETWEEN parent.lft AND parent.rgt WHERE parent.extension = ' . $db->quote($extension) .
' AND parent.published != 1 GROUP BY cat.id) ';
$query->leftJoin($subQuery . 'AS badcats ON badcats.id = c.id');
$query->where('badcats.id is null');
// i for item
if (isset($this->_options['countItems']) && $this->_options['countItems'] == 1) {
if ($this->_options['published'] == 1) {
$query->leftJoin($db->quoteName($this->_table).' AS i ON i.'.$db->quoteName($this->_field).' = c.id AND i.'.$this->_statefield.' = 1');
}
else {
$query->leftJoin($db->quoteName($this->_table).' AS i ON i.'.$db->quoteName($this->_field).' = c.id');
}
$query->select('COUNT(i.'.$db->quoteName($this->_key).') AS numitems');
}
// Group by
$query->group('c.id');
// Filter by language
if ($app->isSite() && $app->getLanguageFilter()) {
$query->where('(' . ($id!='root' ? 'c.id=s.id OR ':'') .'c.language in (' . $db->Quote(JFactory::getLanguage()->getTag()) . ',' . $db->Quote('*') . '))');
}
// Get the results
$db->setQuery($query);
$results = $db->loadObjectList('id');
$childrenLoaded = false;
if (count($results)) {
// Foreach categories
foreach($results as $result)
{
// Deal with root category
if ($result->id == 1) {
$result->id = 'root';
}
// Deal with parent_id
if ($result->parent_id == 1) {
$result->parent_id = 'root';
}
// Create the node
if (!isset($this->_nodes[$result->id])) {
// Create the JCategoryNode and add to _nodes
$this->_nodes[$result->id] = new JCategoryNode($result, $this);
// If this is not root and if the current node's parent is in the list or the current node parent is 0
if ($result->id != 'root' && (isset($this->_nodes[$result->parent_id]) || $result->parent_id == 1)) {
// Compute relationship between node and its parent - set the parent in the _nodes field
$this->_nodes[$result->id]->setParent($this->_nodes[$result->parent_id]);
}
// If the node's parent id is not in the _nodes list and the node is not root (doesn't have parent_id == 0),
// then remove the node from the list
if (!(isset($this->_nodes[$result->parent_id]) || $result->parent_id == 0)) {
unset($this->_nodes[$result->id]);
continue;
}
if ($result->id == $id || $childrenLoaded) {
$this->_nodes[$result->id]->setAllLoaded();
$childrenLoaded = true;
}
}
else if ($result->id == $id || $childrenLoaded) {
// Create the JCategoryNode
$this->_nodes[$result->id] = new JCategoryNode($result, $this);
if ($result->id != 'root' && (isset($this->_nodes[$result->parent_id]) || $result->parent_id)) {
// Compute relationship between node and its parent
$this->_nodes[$result->id]->setParent($this->_nodes[$result->parent_id]);
}
if (!isset($this->_nodes[$result->parent_id])) {
unset($this->_nodes[$result->id]);
continue;
}
if ($result->id == $id || $childrenLoaded) {
$this->_nodes[$result->id]->setAllLoaded();
$childrenLoaded = true;
}
}
}
}
else {
$this->_nodes[$id] = null;
}
}
}
/**
* Helper class to load Categorytree
*
* @package Joomla.Platform
* @subpackage Application
* @since 11.1
*/
class JCategoryNode extends JObject
{
/**
* Primary key
*
* @var integer
* @since 11.1
*/
public $id = null;
/**
* The id of the category in the asset table
*
* @var integer
* @since 11.1
*/
public $asset_id = null;
/**
* The id of the parent of category in the asset table, 0 for category root
*
* @var integer
* @since 11.1
*/
public $parent_id = null;
/**
* The lft value for this category in the category tree
*
* @var integer
* @since 11.1
*/
public $lft = null;
/**
* The rgt value for this category in the category tree
*
* @var integer
* @since 11.1
*/
public $rgt = null;
/**
* The depth of this category's position in the category tree
*
* @var integer
* @since 11.1
*/
public $level = null;
/**
* The extension this category is associated with
*
* @var integer
* @since 11.1
*/
public $extension = null;
/**
* The menu title for the category (a short name)
*
* @var string
* @since 11.1
*/
public $title = null;
/**
* The the alias for the category
*
* @var string
* @since 11.1
*/
public $alias = null;
/**
* Description of the category.
*
* @var string
* @since 11.1
*/
public $description = null;
/**
* The publication status of the category
*
* @var boolean
* @since 11.1
*/
public $published = null;
/**
* Whether the category is or is not checked out
*
* @var boolean
* @since 11.1
*/
public $checked_out = 0;
/**
* The time at which the category was checked out
*
* @var time
* @since 11.1
*/
public $checked_out_time = 0;
/**
* Access level for the category
*
* @var integer
* @since 11.1
*/
public $access = null;
/**
* JSON string of parameters
*
* @var string
* @since 11.1
*/
public $params = null;
/**
* Metadata description
*
* @var string
* @since 11.1
*/
public $metadesc = null;
/**
* Key words for meta data
*
* @var string
* @since 11.1
*/
public $metakey = null;
/**
* JSON string of other meta data
*
* @var string
* @since 11.1
*/
public $metadata = null;
public $created_user_id = null;
/**
* The time at which the category was created
*
* @var time
* @since 11.1
*/
public $created_time = null;
public $modified_user_id = null;
/**
* The time at which the category was modified
*
* @var time
* @since 11.1
*/
public $modified_time = null;
/**
* Nmber of times the category has been viewed
*
* @var integer
* @since 11.1
*/
public $hits = null;
/**
* The language for the category in xx-XX format
*
* @var time
* @since 11.1
*/
public $language = null;
/**
* Number of items in this category or descendants of this category
*
* @var integer
* @since 11.1
*/
public $numitems = null;
/**
* Number of children items
*
* @var
* @since 11.1
*/
public $childrennumitems = null;
/**
* Slug fo the category (used in URL)
*
* @var string
* @since 11.1
*/
public $slug = null;
/**
* Array of assets
*
* @var array
* @since 11.1
*/
public $assets = null;
/**
* Parent Category object
*
* @var object
* @since 11.1
*/
protected $_parent = null;
/**
* @var Array of Children
* @since 11.1
*/
protected $_children = array();
/**
* Path from root to this category
*
* @var array
* @since 11.1
*/
protected $_path = array();
/**
* Category left of this one
*
* @var integer
* @since 11.1
*/
protected $_leftSibling = null;
/**
* Category right of this one
*
* @var
* @since 11.1
*/
protected $_rightSibling = null;
/**
* true if all children have been loaded
*
* @var boolean
* @since 11.1
*/
protected $_allChildrenloaded = false;
/**
* Constructor of this tree
*
* @var
* @since 11.1
*/
protected $_constructor = null;
/**
* Class constructor
*
* @param $category
*
* @return JCategoryNode
*
* @since 11.1
*/
public function __construct($category = null, &$constructor = null)
{
if ($category) {
$this->setProperties($category);
if ($constructor) {
$this->_constructor = &$constructor;
}
return true;
}
return false;
}
/**
* Set the parent of this category
*
* If the category already has a parent, the link is unset
*
* @param mixed $parent JCategoryNode for the parent to be set or null
*
* @return void
* @since 11.1
*/
function setParent(&$parent)
{
if ($parent instanceof JCategoryNode || is_null($parent)) {
if (!is_null($this->_parent)) {
$key = array_search($this, $this->_parent->_children);
unset($this->_parent->_children[$key]);
}
if (!is_null($parent)) {
$parent->_children[] = & $this;
}
$this->_parent = & $parent;
if ($this->id != 'root') {
if ($this->parent_id != 1 ) {
$this->_path = $parent->getPath();
}
$this->_path[] = $this->id.':'.$this->alias;
}
if (count($parent->_children) > 1) {
end($parent->_children);
$this->_leftSibling = prev($parent->_children);
$this->_leftSibling->_rightsibling = &$this;
}
}
}
/**
* Add child to this node
*
* If the child already has a parent, the link is unset
*
* @param JNode $child The child to be added.
*
* @return void
* @since 11.1
*/
function addChild(&$child)
{
if ($child instanceof JCategoryNode) {
$child->setParent($this);
}
}
/**
* Remove a specific child
*
* @param integer $id ID of a category
*
* @return void
*
* @since 11.1
*/
function removeChild($id)
{
$key = array_search($this, $this->_parent->_children);
unset($this->_parent->_children[$key]);
}
/**
* Get the children of this node
*
* @param boolean $recursive False by default
*
* @return array The children
* @since 11.1
*/
function &getChildren($recursive = false)
{
if (!$this->_allChildrenloaded) {
$temp = $this->_constructor->get($this->id, true);
if ($temp) {
$this->_children = $temp->getChildren();
$this->_leftSibling = $temp->getSibling(false);
$this->_rightSibling = $temp->getSibling(true);
$this->setAllLoaded();
}
}
if ($recursive) {
$items = array();
foreach($this->_children as $child)
{
$items[] = $child;
$items = array_merge($items, $child->getChildren(true));
}
return $items;
}
return $this->_children;
}
/**
* Get the parent of this node
*
* @return mixed JNode or null
*
* @since 11.1
*/
function &getParent()
{
return $this->_parent;
}
/**
* Test if this node has children
*
* @return boolean True if there is a child
*
* @since 11.1
*/
function hasChildren()
{
return count($this->_children);
}
/**
* Test if this node has a parent
*
* @return boolean True if there is a parent
*
* @since 11.1
*/
function hasParent()
{
return $this->getParent() != null;
}
/**
* Function to set the left or right sibling of a category
*
* @param object $sibling JCategoryNode object for the sibling
* @param boolean $right If set to false, the sibling is the left one
*
* @return void
*
* @since 11.1
*/
function setSibling($sibling, $right = true)
{
if ($right) {
$this->_rightSibling = $sibling;
}
else {
$this->_leftSibling = $sibling;
}
}
/**
* Returns the right or left sibling of a category
*
* @param boolean $right If set to false, returns the left sibling
*
* @return JCategoryNode or null JCategoryNode object with the sibling information or
* null if there is no sibling on that side.
*
* @since 11.1
*/
function getSibling($right = true)
{
if (!$this->_allChildrenloaded) {
$temp = $this->_constructor->get($this->id, true);
$this->_children = $temp->getChildren();
$this->_leftSibling = $temp->getSibling(false);
$this->_rightSibling = $temp->getSibling(true);
$this->setAllLoaded();
}
if ($right) {
return $this->_rightSibling;
}
else {
return $this->_leftSibling;
}
}
/**
* Returns the category parameters
*
* @return JRegistry
*
* @since 11.1
*/
function getParams()
{
if (!($this->params instanceof JRegistry)) {
$temp = new JRegistry;
$temp->loadString($this->params);
$this->params = $temp;
}
return $this->params;
}
/**
* Returns the category metadata
*
* @return JRegistry A JRegistry object containing the metadata
*
* @since 11.1
*/
function getMetadata()
{
if (!($this->metadata instanceof JRegistry)) {
$temp = new JRegistry;
$temp->loadString($this->metadata);
$this->metadata = $temp;
}
return $this->metadata;
}
/**
* Returns the category path to the root category
*
* @return array
*
* @since 11.1
*/
function getPath()
{
return $this->_path;
}
/**
* Returns the user that created the category
*
* @param boolean $modified_user Returns the modified_user when set to true
*
* @return JUser A JUser object containing a userid
*
* @since 11.1
*/
function getAuthor($modified_user = false)
{
if ($modified_user) {
return JFactory::getUser($this->modified_user_id);
}
return JFactory::getUser($this->created_user_id);
}
/**
* Set to load all children
*
* @return void
*
* @since 11.1
*/
function setAllLoaded()
{
$this->_allChildrenloaded = true;
foreach ($this->_children as $child)
{
$child->setAllLoaded();
}
}
/**
* Returns the number of items.
*
* @param boolean $recursive If false number of children, if true number of descendants
*
* @return integer Number of children or descendants
*
* @since 11.1
*/
function getNumItems($recursive = false)
{
if ($recursive) {
$count = $this->numitems;
foreach ($this->getChildren() as $child)
{
$count = $count + $child->getNumItems(true);
}
return $count;
}
return $this->numitems;
}
}