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<?php |
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/** |
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* (c) Dennis Meckel |
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* |
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* For the full copyright and license information, |
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* please view the LICENSE file that was distributed with this source code. |
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*/ |
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namespace Rayne\wz2008\Graph; |
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use InvalidArgumentException; |
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use OutOfBoundsException; |
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use Rayne\wz2008\Graph\Exception\InvalidParentException; |
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use SplQueue; |
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class WzItem implements WzItemInterface |
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{ |
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/** |
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* @var WzItemInterface[] |
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*/ |
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private $children = []; |
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/** |
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* @var string |
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*/ |
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private $id; |
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/** |
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* @var string[] |
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*/ |
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private $labels; |
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/** |
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* @var int |
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*/ |
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private $level; |
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/** |
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* @var WzItemInterface|null |
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*/ |
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private $parent; |
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/** |
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* @param string $id |
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* @param string[] $labels `Language Code => Translated Label` map. |
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* @param int $level |
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* @param WzItemInterface|null $parent |
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*/ |
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public function __construct($id, array $labels, $level, WzItemInterface $parent = null) |
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{ |
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$this->id = $id; |
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$this->labels = $labels; |
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$this->level = (int) $level; |
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$this->parent = $parent; |
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if ($parent) { |
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$parent->addChild($this); |
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} |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function getId() |
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{ |
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return $this->id; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function getLabel($langCode) |
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{ |
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$code = strtolower($langCode); |
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if (isset($this->labels[$code])) { |
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return $this->labels[$code]; |
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} |
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throw new InvalidArgumentException(sprintf( |
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'Unsupported language code `%s`. Supported codes: `%s`.', |
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$langCode, |
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implode(',', array_keys($this->labels)))); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function getLabels() |
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{ |
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return $this->labels; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function getLevel() |
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{ |
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return $this->level; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function getParent() |
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{ |
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return $this->parent; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function getParentByLevel($level) |
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{ |
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if (!$this->isInLevelBounds($level)) { |
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throw $this->buildLevelOutOfBounds($level); |
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} |
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if ($level >= $this->getLevel()) { |
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return null; |
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} |
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$parent = $this; |
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for ($i = $this->getLevel(); $i > $level; $i--) { |
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$parent = $parent->getParent(); |
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} |
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return $parent; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function addChild(WzItemInterface $child) |
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{ |
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if ($child->getParent() !== $this) { |
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throw new InvalidParentException(sprintf( |
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"The parent of `%s` is invalid. Expected `%s` but got `%s`.", |
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$child->getId(), |
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$this->getId(), |
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$child->getParent() ? $child->getParent()->getId() : '')); |
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} |
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$this->children[] = $child; |
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return $this; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function getChildren() |
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{ |
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return $this->children; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function getChildrenByLevel($level) |
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{ |
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if (!$this->isInLevelBounds($level)) { |
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throw $this->buildLevelOutOfBounds($level); |
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} |
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if ($this->getLevel() >= $level) { |
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return []; |
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} |
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$result = []; |
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$queue = new SplQueue; |
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$queue->enqueue($this); |
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while (!$queue->isEmpty()) { |
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/* @var WzItemInterface $item */ |
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$item = $queue->dequeue(); |
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if ($item->getLevel() == $level) { |
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$result[] = $item; |
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continue; |
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} |
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foreach ($item->getChildren() as $child) { |
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$queue->enqueue($child); |
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} |
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} |
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return $result; |
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} |
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/** |
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* @param int $level |
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* @return OutOfBoundsException |
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*/ |
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private function buildLevelOutOfBounds($level) |
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{ |
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return new OutOfBoundsException(sprintf('Unknown level `%s`.', $level)); |
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} |
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/** |
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* @param int $level |
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* @return bool |
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*/ |
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private function isInLevelBounds($level) |
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{ |
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return self::LEVEL_SECTION <= $level && $level <= self::LEVEL_SUBCLASS; |
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} |
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} |
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Rayne /
wz2008-graph
