<?php
/**
* This file is part of the Nette Framework (https://nette.org)
* Copyright (c) 2004 David Grudl (https://davidgrudl.com)
*/
declare(strict_types=1);
namespace Nette\Utils;
use Nette;
use function array_slice, array_splice, count, is_int;
/**
* Provides the base class for a generic list (items can be accessed by index).
* @template T
* @implements \IteratorAggregate<int, T>
* @implements \ArrayAccess<int, T>
*/
class ArrayList implements \ArrayAccess, \Countable, \IteratorAggregate
{
use Nette\SmartObject;
private array $list = [];
/**
* Transforms array to ArrayList.
* @param list<T> $array
*/
public static function from(array $array): static
{
if (!Arrays::isList($array)) {
throw new Nette\InvalidArgumentException('Array is not valid list.');
}
$obj = new static;
$obj->list = $array;
return $obj;
}
/**
* Returns an iterator over all items.
* @return \Iterator<int, T>
*/
public function &getIterator(): \Iterator
{
foreach ($this->list as &$item) {
yield $item;
}
}
/**
* Returns items count.
*/
public function count(): int
{
return count($this->list);
}
/**
* Replaces or appends an item.
* @param int|null $index
* @param T $value
* @throws Nette\OutOfRangeException
*/
public function offsetSet($index, $value): void
{
if ($index === null) {
$this->list[] = $value;
} elseif (!is_int($index) || $index < 0 || $index >= count($this->list)) {
throw new Nette\OutOfRangeException('Offset invalid or out of range');
} else {
$this->list[$index] = $value;
}
}
/**
* Returns an item.
* @param int $index
* @return T
* @throws Nette\OutOfRangeException
*/
public function offsetGet($index): mixed
{
if (!is_int($index) || $index < 0 || $index >= count($this->list)) {
throw new Nette\OutOfRangeException('Offset invalid or out of range');
}
return $this->list[$index];
}
/**
* Determines whether an item exists.
* @param int $index
*/
public function offsetExists($index): bool
{
return is_int($index) && $index >= 0 && $index < count($this->list);
}
/**
* Removes the element at the specified position in this list.
* @param int $index
* @throws Nette\OutOfRangeException
*/
public function offsetUnset($index): void
{
if (!is_int($index) || $index < 0 || $index >= count($this->list)) {
throw new Nette\OutOfRangeException('Offset invalid or out of range');
}
array_splice($this->list, $index, 1);
}
/**
* Prepends an item.
* @param T $value
*/
public function prepend(mixed $value): void
{
$first = array_slice($this->list, 0, 1);
$this->offsetSet(0, $value);
array_splice($this->list, 1, 0, $first);
}
}
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