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<?php
namespace Kirby\Toolkit;
use ArrayIterator;
use IteratorAggregate;
/**
* Extended version of PHP's iterator
* class that builds the foundation of our
* Collection class.
*
* @package Kirby Toolkit
* @author Bastian Allgeier <bastian@getkirby.com>
* @link https://getkirby.com
* @copyright Bastian Allgeier
* @license https://opensource.org/licenses/MIT
*
* @psalm-suppress MissingTemplateParam Implementing template params
* in this class would require
* implementing them throughout
* the code base: https://github.com/getkirby/kirby/pull/4886#pullrequestreview-1203577545
*/
class Iterator implements IteratorAggregate
{
public array $data = [];
public function __construct(array $data = [])
{
$this->data = $data;
}
/**
* Get an iterator for the items.
*/
public function getIterator(): ArrayIterator
{
return new ArrayIterator($this->data);
}
/**
* Returns the current key
*/
public function key(): int|string|null
{
return key($this->data);
}
/**
* Returns an array of all keys
*/
public function keys(): array
{
return array_keys($this->data);
}
/**
* Returns the current element
*/
public function current(): mixed
{
return current($this->data);
}
/**
* Moves the cursor to the previous element
* and returns it
*/
public function prev(): mixed
{
return prev($this->data);
}
/**
* Moves the cursor to the next element
* and returns it
*/
public function next(): mixed
{
return next($this->data);
}
/**
* Moves the cursor to the first element
*/
public function rewind(): void
{
reset($this->data);
}
/**
* Checks if the current element is valid
*/
public function valid(): bool
{
return $this->current() !== false;
}
/**
* Counts all elements
*/
public function count(): int
{
return count($this->data);
}
/**
* Tries to find the index number for the given element
*
* @param mixed $needle the element to search for
* @return int|false the index (int) of the element or false
*/
public function indexOf(mixed $needle): int|false
{
return array_search($needle, array_values($this->data));
}
/**
* Tries to find the key for the given element
*
* @param mixed $needle the element to search for
* @return int|string|false the name of the key or false
*/
public function keyOf(mixed $needle): int|string|false
{
return array_search($needle, $this->data);
}
/**
* Checks by key if an element is included
*/
public function has(mixed $key): bool
{
return isset($this->data[$key]) === true;
}
/**
* Checks if the current key is set
*/
public function __isset(mixed $key): bool
{
return $this->has($key);
}
/**
* Simplified var_dump output
* @codeCoverageIgnore
*/
public function __debugInfo(): array
{
return $this->data;
}
}