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<?php |
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/** |
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* Elgg Menu Builder |
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* |
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* @package Elgg.Core |
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* @subpackage Navigation |
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* @since 1.8.0 |
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*/ |
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class ElggMenuBuilder { |
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/** |
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* @var \ElggMenuItem[] |
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*/ |
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protected $menu = array(); |
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protected $selected = null; |
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/** |
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* \ElggMenuBuilder constructor |
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* |
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* @param \ElggMenuItem[] $menu Array of \ElggMenuItem objects |
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*/ |
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public function __construct(array $menu) { |
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$this->menu = $menu; |
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} |
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/** |
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* Get a prepared menu array |
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* |
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* @param mixed $sort_by Method to sort the menu by. @see \ElggMenuBuilder::sort() |
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* @return array |
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*/ |
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public function getMenu($sort_by = 'text') { |
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$this->selectFromContext(); |
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$this->selected = $this->findSelected(); |
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$this->setupSections(); |
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$this->setupTrees(); |
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$this->sort($sort_by); |
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return $this->menu; |
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} |
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/** |
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* Get the selected menu item |
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* |
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* @return \ElggMenuItem |
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*/ |
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public function getSelected() { |
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return $this->selected; |
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} |
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/** |
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* Select menu items for the current context |
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* |
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* @return void |
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*/ |
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protected function selectFromContext() { |
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if (!isset($this->menu)) { |
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$this->menu = array(); |
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return; |
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} |
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// get menu items for this context |
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$selected_menu = array(); |
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foreach ($this->menu as $menu_item) { |
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if (!is_object($menu_item)) { |
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_elgg_services()->logger->error("A non-object was passed to \ElggMenuBuilder"); |
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continue; |
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} |
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if ($menu_item->inContext()) { |
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$selected_menu[] = $menu_item; |
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} |
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} |
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$this->menu = $selected_menu; |
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} |
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/** |
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* Group the menu items into sections |
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* |
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* @return void |
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*/ |
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protected function setupSections() { |
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$sectioned_menu = array(); |
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foreach ($this->menu as $menu_item) { |
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if (!isset($sectioned_menu[$menu_item->getSection()])) { |
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$sectioned_menu[$menu_item->getSection()] = array(); |
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} |
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$sectioned_menu[$menu_item->getSection()][] = $menu_item; |
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} |
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$this->menu = $sectioned_menu; |
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} |
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/** |
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* Create trees for each menu section |
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* |
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* @internal The tree is doubly linked (parent and children links) |
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* @return void |
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*/ |
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protected function setupTrees() { |
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$menu_tree = array(); |
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foreach ($this->menu as $key => $section) { |
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$parents = array(); |
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$children = array(); |
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$all_menu_items = array(); |
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// divide base nodes from children |
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foreach ($section as $menu_item) { |
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/* @var \ElggMenuItem $menu_item */ |
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$parent_name = $menu_item->getParentName(); |
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$menu_item_name = $menu_item->getName(); |
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if (!$parent_name) { |
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// no parents so top level menu items |
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$parents[$menu_item_name] = $menu_item; |
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} else { |
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$children[$menu_item_name] = $menu_item; |
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} |
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$all_menu_items[$menu_item_name] = $menu_item; |
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} |
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if (empty($all_menu_items)) { |
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// empty sections can be skipped |
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continue; |
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} |
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View Code Duplication |
if (empty($parents)) { |
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// menu items without parents? That is sad.. report to the log |
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$message = _elgg_services()->translator->translate('ElggMenuBuilder:Trees:NoParents'); |
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_elgg_services()->logger->notice($message); |
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// skip section as without parents menu can not be drawn |
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continue; |
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} |
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foreach ($children as $menu_item_name => $menu_item) { |
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$parent_name = $menu_item->getParentName(); |
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View Code Duplication |
if (!array_key_exists($parent_name, $all_menu_items)) { |
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// orphaned child, inform authorities and skip to next item |
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$message = _elgg_services()->translator->translate('ElggMenuBuilder:Trees:OrphanedChild', array($menu_item_name, $parent_name)); |
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_elgg_services()->logger->notice($message); |
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continue; |
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} |
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if (!in_array($menu_item, $all_menu_items[$parent_name]->getData('children'))) { |
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$all_menu_items[$parent_name]->addChild($menu_item); |
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$menu_item->setParent($all_menu_items[$parent_name]); |
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View Code Duplication |
} else { |
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// menu item already existed in parents children, report the duplicate registration |
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$message = _elgg_services()->translator->translate('ElggMenuBuilder:Trees:DuplicateChild', array($menu_item_name)); |
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_elgg_services()->logger->notice($message); |
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continue; |
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} |
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} |
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// convert keys to indexes for first level of tree |
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$parents = array_values($parents); |
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$menu_tree[$key] = $parents; |
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} |
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$this->menu = $menu_tree; |
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} |
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/** |
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* Find the menu item that is currently selected |
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* |
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* @return \ElggMenuItem |
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*/ |
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protected function findSelected() { |
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// do we have a selected menu item already |
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foreach ($this->menu as $menu_item) { |
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if ($menu_item->getSelected()) { |
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return $menu_item; |
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} |
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} |
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// scan looking for a selected item |
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foreach ($this->menu as $menu_item) { |
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if ($menu_item->getHref()) { |
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if (elgg_http_url_is_identical(current_page_url(), $menu_item->getHref())) { |
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$menu_item->setSelected(true); |
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return $menu_item; |
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} |
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} |
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} |
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return null; |
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} |
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/** |
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* Sort the menu sections and trees |
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* |
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* @param mixed $sort_by Sort type as string or php callback |
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* @return void |
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*/ |
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protected function sort($sort_by) { |
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// sort sections |
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ksort($this->menu); |
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switch ($sort_by) { |
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case 'text': |
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$sort_callback = array('\ElggMenuBuilder', 'compareByText'); |
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break; |
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case 'name': |
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$sort_callback = array('\ElggMenuBuilder', 'compareByName'); |
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break; |
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case 'priority': |
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$sort_callback = array('\ElggMenuBuilder', 'compareByPriority'); |
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break; |
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case 'register': |
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// use registration order - usort breaks this |
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return; |
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break; |
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default: |
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if (is_callable($sort_by)) { |
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$sort_callback = $sort_by; |
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} else { |
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return; |
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} |
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break; |
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} |
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// sort each section |
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foreach ($this->menu as $index => $section) { |
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foreach ($section as $key => $node) { |
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$section[$key]->setData('original_order', $key); |
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} |
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usort($section, $sort_callback); |
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$this->menu[$index] = $section; |
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// depth first traversal of tree |
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foreach ($section as $root) { |
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$stack = array(); |
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array_push($stack, $root); |
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while (!empty($stack)) { |
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$node = array_pop($stack); |
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/* @var \ElggMenuItem $node */ |
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$node->sortChildren($sort_callback); |
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$children = $node->getChildren(); |
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if ($children) { |
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$stack = array_merge($stack, $children); |
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} |
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} |
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} |
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} |
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} |
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/** |
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* Compare two menu items by their display text |
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* HTML tags are stripped before comparison |
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* |
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* @param \ElggMenuItem $a Menu item |
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* @param \ElggMenuItem $b Menu item |
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* @return bool |
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*/ |
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public static function compareByText($a, $b) { |
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$at = strip_tags($a->getText()); |
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$bt = strip_tags($b->getText()); |
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$result = strnatcmp($at, $bt); |
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if ($result === 0) { |
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return $a->getData('original_order') - $b->getData('original_order'); |
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} |
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return $result; |
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} |
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/** |
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* Compare two menu items by their identifiers |
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* |
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* @param \ElggMenuItem $a Menu item |
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* @param \ElggMenuItem $b Menu item |
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* @return bool |
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*/ |
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public static function compareByName($a, $b) { |
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$an = $a->getName(); |
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$bn = $b->getName(); |
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$result = strnatcmp($an, $bn); |
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if ($result === 0) { |
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return $a->getData('original_order') - $b->getData('original_order'); |
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} |
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return $result; |
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} |
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/** |
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* Compare two menu items by their priority |
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* |
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* @param \ElggMenuItem $a Menu item |
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* @param \ElggMenuItem $b Menu item |
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* @return bool |
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* @since 1.9.0 |
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*/ |
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View Code Duplication |
public static function compareByPriority($a, $b) { |
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$aw = $a->getPriority(); |
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$bw = $b->getPriority(); |
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if ($aw == $bw) { |
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return $a->getData('original_order') - $b->getData('original_order'); |
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} |
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return $aw - $bw; |
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} |
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/** |
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* Compare two menu items by their priority |
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* |
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* @param \ElggMenuItem $a Menu item |
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* @param \ElggMenuItem $b Menu item |
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* @return bool |
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* @deprecated 1.9 Use compareByPriority() |
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*/ |
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View Code Duplication |
public static function compareByWeight($a, $b) { |
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elgg_deprecated_notice("\ElggMenuBuilder::compareByWeight() deprecated by \ElggMenuBuilder::compareByPriority", 1.9); |
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$aw = $a->getPriority(); |
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$bw = $b->getPriority(); |
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if ($aw == $bw) { |
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return $a->getData('original_order') - $b->getData('original_order'); |
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} |
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return $aw - $bw; |
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} |
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} |
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335
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|
|
|