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<?php |
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declare(strict_types=1); |
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namespace Nexendrie\Utils; |
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use Nette\Utils\Arrays; |
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/** |
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* TCollection |
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* Target class has to implement \ArrayAccess, \Countable, \IteratorAggregate interfaces |
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* |
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* @author Jakub Konečný |
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*/ |
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trait TCollection { |
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protected $items = []; |
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/** @var string Type of items in the collection */ |
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protected $class; |
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/** @var string|NULL */ |
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protected $uniqueProperty = NULL; |
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/** @var bool */ |
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protected $locked = false; |
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public function isLocked(): bool { |
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return $this->locked; |
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} |
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public function lock(): void { |
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$this->locked = true; |
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} |
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public function count(): int { |
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return count($this->items); |
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} |
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public function getIterator(): \ArrayIterator { |
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return new \ArrayIterator($this->items); |
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} |
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/** |
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* @param int $index |
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*/ |
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public function offsetExists($index): bool { |
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return $index >= 0 AND $index < count($this->items); |
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} |
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/** |
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* @param int|NULL $index |
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* @throws \OutOfRangeException |
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*/ |
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public function offsetGet($index) { |
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if($index < 0 OR $index >= count($this->items)) { |
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throw new \OutOfRangeException("Offset invalid or out of range."); |
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} |
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return $this->items[$index]; |
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} |
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/** |
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* @param object $newItem |
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*/ |
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protected function checkType($newItem): bool { |
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return ($newItem instanceof $this->class); |
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} |
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/** |
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* @param object $newItem |
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*/ |
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protected function checkUniqueness($newItem): bool { |
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if(is_null($this->uniqueProperty)) { |
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return true; |
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} |
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return Arrays::every($this->items, function($value) use($newItem) { |
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return ($newItem->{$this->uniqueProperty} !== $value->{$this->uniqueProperty}); |
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}); |
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} |
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/** |
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* @param int|NULL $index |
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* @param object $item |
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* @throws \OutOfRangeException |
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* @throws \InvalidArgumentException |
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* @throws \RuntimeException |
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*/ |
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public function offsetSet($index, $item): void { |
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if($this->locked) { |
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throw new \RuntimeException("Cannot add items to locked collection."); |
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} elseif(!$this->checkType($item)) { |
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throw new \InvalidArgumentException("Argument must be of $this->class type."); |
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} elseif(!$this->checkUniqueness($item)) { |
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$property = $this->uniqueProperty; |
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throw new \RuntimeException("Duplicate $property {$item->$property}."); |
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} |
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if($index === NULL) { |
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$this->items[] = & $item; |
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} elseif($index < 0 OR $index >= count($this->items)) { |
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throw new \OutOfRangeException("Offset invalid or out of range."); |
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} else { |
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$this->items[$index] = & $item; |
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} |
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} |
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/** |
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* @param int $index |
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* @throws \OutOfRangeException |
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*/ |
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public function offsetUnset($index): void { |
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if($this->locked) { |
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throw new \RuntimeException("Cannot remove items from locked collection."); |
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} elseif($index < 0 OR $index >= count($this->items)) { |
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throw new \OutOfRangeException("Offset invalid or out of range."); |
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} |
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array_splice($this->items, $index, 1); |
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1 |
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} |
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} |
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?> |
nexendrie /
utils
