mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-10-22 14:05:37 +02:00
717 lines
22 KiB
PHP
717 lines
22 KiB
PHP
<?php
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/**
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* DataObjects that use the Hierarchy extension can be be organised as a hierarchy, with children and parents.
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* The most obvious example of this is SiteTree.
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* @package framework
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* @subpackage model
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*/
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class Hierarchy extends DataExtension {
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protected $markedNodes;
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protected $markingFilter;
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/**
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* @var Int
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*/
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protected $_cache_numChildren;
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function augmentSQL(SQLQuery &$query) {
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}
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function augmentDatabase() {
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}
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function augmentWrite(&$manipulation) {
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}
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static function add_to_class($class, $extensionClass, $args = null) {
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Config::inst()->update($class, 'has_one', array('Parent' => $class));
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parent::add_to_class($class, $extensionClass, $args);
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}
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/**
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* Validate the owner object - check for existence of infinite loops.
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*/
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function validate(ValidationResult $validationResult) {
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if (!$this->owner->ID) return; // The object is new, won't be looping.
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if (!$this->owner->ParentID) return; // The object has no parent, won't be looping.
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if (!$this->owner->isChanged('ParentID')) return; // The parent has not changed, skip the check for performance reasons.
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// Walk the hierarchy upwards until we reach the top, or until we reach the originating node again.
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$node = $this->owner;
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while($node) {
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if ($node->ParentID==$this->owner->ID) {
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// Hierarchy is looping.
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$validationResult->error(
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_t(
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'Hierarchy.InfiniteLoopNotAllowed',
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'Infinite loop found within the "{type}" hierarchy. Please change the parent to resolve this',
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'First argument is the class that makes up the hierarchy.',
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array('type' => $this->owner->class)
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),
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'INFINITE_LOOP'
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);
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break;
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}
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$node = $node->ParentID ? $node->Parent() : null;
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}
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// At this point the $validationResult contains the response.
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}
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/**
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* Returns the children of this DataObject as an XHTML UL. This will be called recursively on each child,
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* so if they have children they will be displayed as a UL inside a LI.
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* @param string $attributes Attributes to add to the UL.
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* @param string|callable $titleEval PHP code to evaluate to start each child - this should include '<li>'
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* @param string $extraArg Extra arguments that will be passed on to children, for if they overload this function.
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* @param boolean $limitToMarked Display only marked children.
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* @param string $childrenMethod The name of the method used to get children from each object
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* @param boolean $rootCall Set to true for this first call, and then to false for calls inside the recursion. You should not change this.
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* @param int $minNodeCount
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* @return string
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*/
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public function getChildrenAsUL($attributes = "", $titleEval = '"<li>" . $child->Title', $extraArg = null, $limitToMarked = false, $childrenMethod = "AllChildrenIncludingDeleted", $numChildrenMethod = "numChildren", $rootCall = true, $minNodeCount = 30) {
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if($limitToMarked && $rootCall) {
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$this->markingFinished($numChildrenMethod);
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}
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if($this->owner->hasMethod($childrenMethod)) {
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$children = $this->owner->$childrenMethod($extraArg);
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} else {
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user_error(sprintf("Can't find the method '%s' on class '%s' for getting tree children",
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$childrenMethod, get_class($this->owner)), E_USER_ERROR);
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}
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if($children) {
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if($attributes) {
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$attributes = " $attributes";
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}
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$output = "<ul$attributes>\n";
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foreach($children as $child) {
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if(!$limitToMarked || $child->isMarked()) {
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$foundAChild = true;
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$output .= (is_callable($titleEval)) ? $titleEval($child) : eval("return $titleEval;");
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$output .= "\n" .
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$child->getChildrenAsUL("", $titleEval, $extraArg, $limitToMarked, $childrenMethod, $numChildrenMethod, false, $minNodeCount) . "</li>\n";
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}
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}
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$output .= "</ul>\n";
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}
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if(isset($foundAChild) && $foundAChild) {
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return $output;
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}
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}
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/**
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* Mark a segment of the tree, by calling mark().
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* The method performs a breadth-first traversal until the number of nodes is more than minCount.
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* This is used to get a limited number of tree nodes to show in the CMS initially.
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*
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* This method returns the number of nodes marked. After this method is called other methods
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* can check isExpanded() and isMarked() on individual nodes.
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*
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* @param int $minNodeCount The minimum amount of nodes to mark.
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* @return int The actual number of nodes marked.
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*/
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public function markPartialTree($minNodeCount = 30, $context = null, $childrenMethod = "AllChildrenIncludingDeleted", $numChildrenMethod = "numChildren") {
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if(!is_numeric($minNodeCount)) $minNodeCount = 30;
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$this->markedNodes = array($this->owner->ID => $this->owner);
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$this->owner->markUnexpanded();
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// foreach can't handle an ever-growing $nodes list
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while(list($id, $node) = each($this->markedNodes)) {
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// Inspect the number of potential nodes to mark - if its more than the minimum count,
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// don't query them in the first place to inspect further marking state in-memory
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if((sizeof($this->markedNodes) + $node->$numChildrenMethod()) >= $minNodeCount) break;
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$this->markChildren($node, $context, $childrenMethod, $numChildrenMethod);
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if($minNodeCount && sizeof($this->markedNodes) >= $minNodeCount) {
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break;
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}
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}
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return sizeof($this->markedNodes);
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}
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/**
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* Filter the marking to only those object with $node->$parameterName = $parameterValue
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* @param string $parameterName The parameter on each node to check when marking.
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* @param mixed $parameterValue The value the parameter must be to be marked.
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*/
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public function setMarkingFilter($parameterName, $parameterValue) {
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$this->markingFilter = array(
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"parameter" => $parameterName,
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"value" => $parameterValue
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);
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}
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/**
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* Filter the marking to only those where the function returns true.
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* The node in question will be passed to the function.
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* @param string $funcName The function name.
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*/
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public function setMarkingFilterFunction($funcName) {
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$this->markingFilter = array(
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"func" => $funcName,
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);
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}
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/**
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* Returns true if the marking filter matches on the given node.
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* @param DataObject $node Node to check.
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* @return boolean
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*/
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public function markingFilterMatches($node) {
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if(!$this->markingFilter) {
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return true;
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}
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if(isset($this->markingFilter['parameter']) && $parameterName = $this->markingFilter['parameter']) {
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if(is_array($this->markingFilter['value'])){
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$ret = false;
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foreach($this->markingFilter['value'] as $value) {
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$ret = $ret||$node->$parameterName==$value;
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if($ret == true) {
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break;
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}
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}
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return $ret;
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} else {
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return ($node->$parameterName == $this->markingFilter['value']);
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}
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} else if ($func = $this->markingFilter['func']) {
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return call_user_func($func, $node);
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}
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}
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/**
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* Mark all children of the given node that match the marking filter.
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* @param DataObject $node Parent node.
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*/
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public function markChildren($node, $context = null, $childrenMethod = "AllChildrenIncludingDeleted", $numChildrenMethod = "numChildren") {
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if($node->hasMethod($childrenMethod)) {
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$children = $node->$childrenMethod($context);
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} else {
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user_error(sprintf("Can't find the method '%s' on class '%s' for getting tree children",
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$childrenMethod, get_class($node)), E_USER_ERROR);
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}
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$node->markExpanded();
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if($children) {
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foreach($children as $child) {
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if(!$this->markingFilter || $this->markingFilterMatches($child)) {
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if($child->$numChildrenMethod()) {
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$child->markUnexpanded();
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} else {
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$child->markExpanded();
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}
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$this->markedNodes[$child->ID] = $child;
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}
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}
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}
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}
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/**
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* Ensure marked nodes that have children are also marked expanded.
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* Call this after marking but before iterating over the tree.
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*/
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protected function markingFinished($numChildrenMethod = "numChildren") {
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// Mark childless nodes as expanded.
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if($this->markedNodes) {
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foreach($this->markedNodes as $id => $node) {
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if(!$node->isExpanded() && !$node->$numChildrenMethod()) {
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$node->markExpanded();
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}
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}
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}
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}
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/**
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* Return CSS classes of 'unexpanded', 'closed', both, or neither, depending on
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* the marking of this DataObject.
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*/
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public function markingClasses() {
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$classes = '';
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if(!$this->isExpanded()) {
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$classes .= " unexpanded jstree-closed";
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}
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if($this->isTreeOpened()) {
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if($this->numChildren() > 0) $classes .= " jstree-open";
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} else {
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$classes .= " closed";
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}
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return $classes;
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}
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/**
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* Mark the children of the DataObject with the given ID.
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* @param int $id ID of parent node.
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* @param boolean $open If this is true, mark the parent node as opened.
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*/
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public function markById($id, $open = false) {
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if(isset($this->markedNodes[$id])) {
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$this->markChildren($this->markedNodes[$id]);
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if($open) {
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$this->markedNodes[$id]->markOpened();
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}
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return true;
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} else {
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return false;
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}
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}
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/**
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* Expose the given object in the tree, by marking this page and all it ancestors.
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* @param DataObject $childObj
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*/
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public function markToExpose($childObj) {
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if(is_object($childObj)){
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$stack = array_reverse($childObj->parentStack());
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foreach($stack as $stackItem) {
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$this->markById($stackItem->ID, true);
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}
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}
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}
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/**
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* Return the IDs of all the marked nodes
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*/
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public function markedNodeIDs() {
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return array_keys($this->markedNodes);
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}
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/**
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* Return an array of this page and its ancestors, ordered item -> root.
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* @return array
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*/
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public function parentStack() {
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$p = $this->owner;
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while($p) {
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$stack[] = $p;
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$p = $p->ParentID ? $p->Parent() : null;
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}
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return $stack;
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}
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/**
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* True if this DataObject is marked.
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* @var boolean
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*/
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protected static $marked = array();
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/**
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* True if this DataObject is expanded.
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* @var boolean
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*/
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protected static $expanded = array();
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/**
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* True if this DataObject is opened.
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* @var boolean
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*/
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protected static $treeOpened = array();
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/**
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* Mark this DataObject as expanded.
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*/
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public function markExpanded() {
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self::$marked[ClassInfo::baseDataClass($this->owner->class)][$this->owner->ID] = true;
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self::$expanded[ClassInfo::baseDataClass($this->owner->class)][$this->owner->ID] = true;
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}
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/**
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* Mark this DataObject as unexpanded.
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*/
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public function markUnexpanded() {
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self::$marked[ClassInfo::baseDataClass($this->owner->class)][$this->owner->ID] = true;
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self::$expanded[ClassInfo::baseDataClass($this->owner->class)][$this->owner->ID] = false;
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}
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/**
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* Mark this DataObject's tree as opened.
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*/
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public function markOpened() {
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self::$marked[ClassInfo::baseDataClass($this->owner->class)][$this->owner->ID] = true;
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self::$treeOpened[ClassInfo::baseDataClass($this->owner->class)][$this->owner->ID] = true;
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}
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/**
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* Check if this DataObject is marked.
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* @return boolean
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*/
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public function isMarked() {
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$baseClass = ClassInfo::baseDataClass($this->owner->class);
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$id = $this->owner->ID;
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return isset(self::$marked[$baseClass][$id]) ? self::$marked[$baseClass][$id] : false;
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}
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/**
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* Check if this DataObject is expanded.
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* @return boolean
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*/
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public function isExpanded() {
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$baseClass = ClassInfo::baseDataClass($this->owner->class);
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$id = $this->owner->ID;
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return isset(self::$expanded[$baseClass][$id]) ? self::$expanded[$baseClass][$id] : false;
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}
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/**
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* Check if this DataObject's tree is opened.
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*/
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public function isTreeOpened() {
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$baseClass = ClassInfo::baseDataClass($this->owner->class);
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$id = $this->owner->ID;
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return isset(self::$treeOpened[$baseClass][$id]) ? self::$treeOpened[$baseClass][$id] : false;
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}
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/**
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* Return a partial tree as an HTML UL.
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*/
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public function partialTreeAsUL($minCount = 50) {
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$children = $this->owner->AllChildren();
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if($children) {
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if($attributes) $attributes = " $attributes";
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$output = "<ul$attributes>\n";
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foreach($children as $child) {
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$output .= eval("return $titleEval;") . "\n" .
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$child->getChildrenAsUL("", $titleEval, $extraArg) . "</li>\n";
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}
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$output .= "</ul>\n";
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}
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return $output;
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}
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/**
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* Get a list of this DataObject's and all it's descendants IDs.
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* @return int
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*/
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public function getDescendantIDList() {
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$idList = array();
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$this->loadDescendantIDListInto($idList);
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return $idList;
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}
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/**
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* Get a list of this DataObject's and all it's descendants ID, and put it in $idList.
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* @var array $idList Array to put results in.
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*/
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public function loadDescendantIDListInto(&$idList) {
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if($children = $this->AllChildren()) {
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foreach($children as $child) {
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if(in_array($child->ID, $idList)) {
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continue;
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}
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$idList[] = $child->ID;
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$ext = $child->getExtensionInstance('Hierarchy');
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$ext->setOwner($child);
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$ext->loadDescendantIDListInto($idList);
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$ext->clearOwner();
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}
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}
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}
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/**
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* Get the children for this DataObject.
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* @return SS_List
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*/
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public function Children() {
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if(!(isset($this->_cache_children) && $this->_cache_children)) {
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$result = $this->owner->stageChildren(false);
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if(isset($result)) {
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$this->_cache_children = new ArrayList();
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foreach($result as $child) {
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if($child->canView()) {
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$this->_cache_children->push($child);
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}
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}
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}
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}
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return $this->_cache_children;
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}
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/**
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* Return all children, including those 'not in menus'.
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* @return SS_List
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*/
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public function AllChildren() {
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return $this->owner->stageChildren(true);
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}
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/**
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* Return all children, including those that have been deleted but are still in live.
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* Deleted children will be marked as "DeletedFromStage"
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* Added children will be marked as "AddedToStage"
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* Modified children will be marked as "ModifiedOnStage"
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* Everything else has "SameOnStage" set, as an indicator that this information has been looked up.
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* @return SS_List
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*/
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public function AllChildrenIncludingDeleted($context = null) {
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return $this->doAllChildrenIncludingDeleted($context);
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}
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/**
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* @see AllChildrenIncludingDeleted
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*
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* @param unknown_type $context
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* @return SS_List
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*/
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public function doAllChildrenIncludingDeleted($context = null) {
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if(!$this->owner) user_error('Hierarchy::doAllChildrenIncludingDeleted() called without $this->owner');
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$idxStageChildren = array();
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$idxLiveChildren = array();
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$baseClass = ClassInfo::baseDataClass($this->owner->class);
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if($baseClass) {
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$stageChildren = $this->owner->stageChildren(true);
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// Add live site content that doesn't exist on the stage site, if required.
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if($this->owner->hasExtension('Versioned')) {
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// Next, go through the live children. Only some of these will be listed
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$liveChildren = $this->owner->liveChildren(true, true);
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if($liveChildren) {
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$merged = new ArrayList();
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$merged->merge($stageChildren);
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$merged->merge($liveChildren);
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$stageChildren = $merged;
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}
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}
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$this->owner->extend("augmentAllChildrenIncludingDeleted", $stageChildren, $context);
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} else {
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user_error("Hierarchy::AllChildren() Couldn't determine base class for '{$this->owner->class}'", E_USER_ERROR);
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}
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return $stageChildren;
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}
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/**
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* Return all the children that this page had, including pages that were deleted
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* from both stage & live.
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*/
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public function AllHistoricalChildren() {
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if(!$this->owner->hasExtension('Versioned')) throw new Exception('Hierarchy->AllHistoricalChildren() only works with Versioned extension applied');
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$baseClass=ClassInfo::baseDataClass($this->owner->class);
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return Versioned::get_including_deleted($baseClass,
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"\"ParentID\" = " . (int)$this->owner->ID, "\"$baseClass\".\"ID\" ASC");
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}
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/**
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* Return the number of children that this page ever had, including pages that were deleted
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*/
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public function numHistoricalChildren() {
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if(!$this->owner->hasExtension('Versioned')) throw new Exception('Hierarchy->AllHistoricalChildren() only works with Versioned extension applied');
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return Versioned::get_including_deleted(ClassInfo::baseDataClass($this->owner->class),
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"\"ParentID\" = " . (int)$this->owner->ID)->count();
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}
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/**
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* Return the number of direct children.
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* By default, values are cached after the first invocation.
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|
* Can be augumented by {@link augmentNumChildrenCountQuery()}.
|
|
*
|
|
* @param Boolean $cache
|
|
* @return int
|
|
*/
|
|
public function numChildren($cache = true) {
|
|
// Build the cache for this class if it doesn't exist.
|
|
if(!$cache || !is_numeric($this->_cache_numChildren)) {
|
|
// Hey, this is efficient now!
|
|
// We call stageChildren(), because Children() has canView() filtering
|
|
$this->_cache_numChildren = (int)$this->owner->stageChildren(true)->Count();
|
|
}
|
|
|
|
// If theres no value in the cache, it just means that it doesn't have any children.
|
|
return $this->_cache_numChildren;
|
|
}
|
|
|
|
/**
|
|
* Return children from the stage site
|
|
*
|
|
* @param showAll Inlcude all of the elements, even those not shown in the menus.
|
|
* (only applicable when extension is applied to {@link SiteTree}).
|
|
* @return SS_List
|
|
*/
|
|
public function stageChildren($showAll = false) {
|
|
if($this->owner->db('ShowInMenus')) {
|
|
$extraFilter = ($showAll) ? '' : " AND \"ShowInMenus\"=1";
|
|
} else {
|
|
$extraFilter = '';
|
|
}
|
|
|
|
$baseClass = ClassInfo::baseDataClass($this->owner->class);
|
|
|
|
$staged = DataObject::get($baseClass, "\"{$baseClass}\".\"ParentID\" = "
|
|
. (int)$this->owner->ID . " AND \"{$baseClass}\".\"ID\" != " . (int)$this->owner->ID
|
|
. $extraFilter, "");
|
|
|
|
$this->owner->extend("augmentStageChildren", $staged, $showAll);
|
|
return $staged;
|
|
}
|
|
|
|
/**
|
|
* Return children from the live site, if it exists.
|
|
*
|
|
* @param boolean $showAll Include all of the elements, even those not shown in the menus.
|
|
* (only applicable when extension is applied to {@link SiteTree}).
|
|
* @param boolean $onlyDeletedFromStage Only return items that have been deleted from stage
|
|
* @return SS_List
|
|
*/
|
|
public function liveChildren($showAll = false, $onlyDeletedFromStage = false) {
|
|
if(!$this->owner->hasExtension('Versioned')) throw new Exception('Hierarchy->liveChildren() only works with Versioned extension applied');
|
|
|
|
$baseClass = ClassInfo::baseDataClass($this->owner->class);
|
|
$id = $this->owner->ID;
|
|
|
|
$children = DataObject::get($baseClass)->where("\"{$baseClass}\".\"ParentID\" = $id AND \"{$baseClass}\".\"ID\" != $id");
|
|
if(!$showAll) $children = $children->where('"ShowInMenus" = 1');
|
|
|
|
// Query the live site
|
|
$children->dataQuery()->setQueryParam('Versioned.mode', 'stage');
|
|
$children->dataQuery()->setQueryParam('Versioned.stage', 'Live');
|
|
|
|
if($onlyDeletedFromStage) {
|
|
// Note that this makes a second query, and could be optimised to be a join
|
|
$stageChildren = DataObject::get($baseClass)
|
|
->where("\"{$baseClass}\".\"ID\" != $id");
|
|
$stageChildren->dataQuery()->setQueryParam('Versioned.mode', 'stage');
|
|
$stageChildren->dataQuery()->setQueryParam('Versioned.stage', '');
|
|
|
|
$ids = $stageChildren->column("ID");
|
|
if($ids) {
|
|
$children = $children->where("\"$baseClass\".\"ID\" NOT IN (" . implode(',',$ids) . ")");
|
|
}
|
|
}
|
|
|
|
return $children;
|
|
}
|
|
|
|
/**
|
|
* Get the parent of this class.
|
|
* @return DataObject
|
|
*/
|
|
public function getParent($filter = '') {
|
|
if($p = $this->owner->__get("ParentID")) {
|
|
$tableClasses = ClassInfo::dataClassesFor($this->owner->class);
|
|
$baseClass = array_shift($tableClasses);
|
|
$filter .= ($filter) ? " AND " : ""."\"$baseClass\".\"ID\" = $p";
|
|
return DataObject::get_one($this->owner->class, $filter);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Return all the parents of this class in a set ordered from the lowest to highest parent.
|
|
*
|
|
* @return SS_List
|
|
*/
|
|
public function getAncestors() {
|
|
$ancestors = new ArrayList();
|
|
$object = $this->owner;
|
|
|
|
while($object = $object->getParent()) {
|
|
$ancestors->push($object);
|
|
}
|
|
|
|
return $ancestors;
|
|
}
|
|
|
|
/**
|
|
* Returns a human-readable, flattened representation of the path to the object,
|
|
* using its {@link Title()} attribute.
|
|
*
|
|
* @param String
|
|
* @return String
|
|
*/
|
|
public function getBreadcrumbs($separator = ' » ') {
|
|
$crumbs = array();
|
|
$ancestors = array_reverse($this->owner->getAncestors()->toArray());
|
|
foreach($ancestors as $ancestor) $crumbs[] = $ancestor->Title;
|
|
$crumbs[] = $this->owner->Title;
|
|
return implode($separator, $crumbs);
|
|
}
|
|
|
|
/**
|
|
* Get the next node in the tree of the type. If there is no instance of the className descended from this node,
|
|
* then search the parents.
|
|
*
|
|
* @todo Write!
|
|
*/
|
|
public function naturalPrev( $className, $afterNode = null ) {
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Get the next node in the tree of the type. If there is no instance of the className descended from this node,
|
|
* then search the parents.
|
|
* @param string $className Class name of the node to find.
|
|
* @param string|int $root ID/ClassName of the node to limit the search to
|
|
* @param DataObject afterNode Used for recursive calls to this function
|
|
* @return DataObject
|
|
*/
|
|
public function naturalNext( $className = null, $root = 0, $afterNode = null ) {
|
|
// If this node is not the node we are searching from, then we can possibly return this
|
|
// node as a solution
|
|
if($afterNode && $afterNode->ID != $this->owner->ID) {
|
|
if(!$className || ($className && $this->owner->class == $className)) {
|
|
return $this->owner;
|
|
}
|
|
}
|
|
|
|
$nextNode = null;
|
|
$baseClass = ClassInfo::baseDataClass($this->owner->class);
|
|
|
|
$children = DataObject::get(ClassInfo::baseDataClass($this->owner->class), "\"$baseClass\".\"ParentID\"={$this->owner->ID}" . ( ( $afterNode ) ? " AND \"Sort\" > " . sprintf( '%d', $afterNode->Sort ) : "" ), '"Sort" ASC');
|
|
|
|
// Try all the siblings of this node after the given node
|
|
/*if( $siblings = DataObject::get( ClassInfo::baseDataClass($this->owner->class), "\"ParentID\"={$this->owner->ParentID}" . ( $afterNode ) ? "\"Sort\" > {$afterNode->Sort}" : "" , '\"Sort\" ASC' ) )
|
|
$searchNodes->merge( $siblings );*/
|
|
|
|
if($children) {
|
|
foreach($children as $node) {
|
|
if($nextNode = $node->naturalNext($className, $node->ID, $this->owner)) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if($nextNode) {
|
|
return $nextNode;
|
|
}
|
|
}
|
|
|
|
// if this is not an instance of the root class or has the root id, search the parent
|
|
if(!(is_numeric($root) && $root == $this->owner->ID || $root == $this->owner->class) && ($parent = $this->owner->Parent())) {
|
|
return $parent->naturalNext( $className, $root, $this->owner );
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
function flushCache() {
|
|
$this->_cache_children = null;
|
|
$this->_cache_numChildren = null;
|
|
self::$marked = array();
|
|
self::$expanded = array();
|
|
self::$treeOpened = array();
|
|
}
|
|
|
|
public static function reset() {
|
|
self::$marked = array();
|
|
self::$expanded = array();
|
|
self::$treeOpened = array();
|
|
}
|
|
|
|
}
|
|
|