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<?php |
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namespace WebComplete\core\utils\tree; |
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use WebComplete\core\entity\AbstractEntity; |
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class Tree |
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{ |
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/** |
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* @var AbstractEntity[] |
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*/ |
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protected $items = []; |
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protected $root = []; |
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protected $parentIds = []; |
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protected $childrenIds = []; |
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protected $parentField; |
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protected $sortField; |
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/** |
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* @param AbstractEntity[] $items |
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* @param string $parentField |
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* @param string $sortField |
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* |
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* @throws \InvalidArgumentException |
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*/ |
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public function __construct(array $items, string $parentField = 'parent_id', string $sortField = 'sort') |
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{ |
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$this->parentField = $parentField; |
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$this->sortField = $sortField; |
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$this->initItems($items); |
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} |
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/** |
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* @param $id |
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* |
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* @return null|AbstractEntity |
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*/ |
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public function getItem($id) |
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{ |
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return $this->items[$id] ?? null; |
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} |
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/** |
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* @return AbstractEntity[] |
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*/ |
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public function getAllItems(): array |
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{ |
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return $this->items; |
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} |
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/** |
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* @return AbstractEntity[] |
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*/ |
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public function getRootItems(): array |
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{ |
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$result = []; |
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foreach ($this->root as $id) { |
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if ($item = $this->getItem($id)) { |
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$result[$id] = $item; |
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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 $id |
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* |
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* @return null|AbstractEntity |
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*/ |
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public function getParent($id) |
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{ |
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return $this->getItem($this->parentIds[$id] ?? null); |
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} |
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/** |
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* @param $id |
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* |
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* @return AbstractEntity[] |
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*/ |
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public function getChildren($id): array |
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{ |
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$result = []; |
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$childrenIds = (array)($this->childrenIds[$id] ?? []); |
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foreach ($childrenIds as $childId) { |
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if ($child = $this->getItem($childId)) { |
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$result[$childId] = $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 array $items |
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* |
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* @throws \InvalidArgumentException |
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*/ |
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protected function initItems(array $items) |
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{ |
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foreach ($items as $k => $item) { |
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if (!$item instanceof AbstractEntity) { |
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throw new \InvalidArgumentException('Item ' . $k . ' is not an instance of ' . AbstractEntity::class); |
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} |
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$this->items[$item->getId()] = $item; |
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} |
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\uasort($this->items, function (AbstractEntity $item1, AbstractEntity $item2) { |
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return $item1->get($this->sortField) <=> $item2->get($this->sortField); |
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}); |
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foreach ($this->items as $item) { |
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$id = $item->getId(); |
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$parentId = $item->get($this->parentField); |
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$this->parentIds[$id] = $parentId; |
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isset($this->childrenIds[$parentId]) |
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? $this->childrenIds[$parentId][] = $id |
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: $this->childrenIds[$parentId] = [$id]; |
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if (!$parentId) { |
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$this->root[] = $item->getId(); |
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} |
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} |
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} |
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} |
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web-complete /
core
