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<?php
namespace SRF\Outline;
/**
* A tree structure for holding the outline data
*
* @license GNU GPL v2+
* @since 3.1
*/
class OutlineTree {
/**
* @var []
*/
public $tree;
/**
* @var []
*/
public $items;
/**
* @var integer
*/
public $itemCount = 0;
/**
* @var integer
*/
public $leafCount = 0;
/**
* @since 3.1
*
* @param array $items
*/
public function __construct( $items = [] ) {
$this->tree = [];
$this->items = $items;
}
/**
* @since 3.1
*
* @param $item
*/
public function addItem( $item ) {
$this->items[] = $item;
$this->itemCount++;
}
/**
* @since 3.1
*
* @param $vals
* @param $item
*/
public function categorizeItem( $vals, $item ) {
foreach ( $vals as $val ) {
if ( array_key_exists( $val, $this->tree ) ) {
$this->tree[$val]->items[] = $item;
$this->tree[$val]->leafCount++;
} else {
$this->tree[$val] = new self( [ $item ] );
$this->tree[$val]->leafCount++;
}
}
}
/**
* @since 3.1
*
* @param $property
*/
public function addProperty( $property ) {
if ( $this->items !== null && count( $this->items ) > 0 ) {
foreach ( $this->items as $item ) {
$cur_vals = $item->getFieldValues( $property );
$this->categorizeItem( $cur_vals, $item );
}
$this->items = null;
} else {
foreach ( $this->tree as $i => $node ) {
$this->tree[$i]->addProperty( $property );
}
}
}
}
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