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<?php
/*
* This file is part of the league/commonmark package.
*
* (c) Colin O'Dell <colinodell@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace League\CommonMark\Util;
/**
* Array collection
*
* Provides a wrapper around a standard PHP array.
*
* @internal
*/
class ArrayCollection implements \IteratorAggregate, \Countable, \ArrayAccess
{
/**
* @var array
*/
private $elements;
/**
* Constructor
*
* @param array $elements
*/
public function __construct(array $elements = [])
{
$this->elements = $elements;
}
/**
* @return mixed
*/
public function first()
{
return \reset($this->elements);
}
/**
* @return mixed
*/
public function last()
{
return \end($this->elements);
}
/**
* Retrieve an external iterator
*
* @return \ArrayIterator
*/
public function getIterator()
{
return new \ArrayIterator($this->elements);
}
/**
* @param mixed $element
*
* @return bool
*/
public function add($element): bool
{
$this->elements[] = $element;
return true;
}
/**
* @param mixed $key
* @param mixed $value
*/
public function set($key, $value)
{
$this->elements[$key] = $value;
}
/**
* @param mixed $key
*
* @return mixed
*/
public function get($key)
{
return isset($this->elements[$key]) ? $this->elements[$key] : null;
}
/**
* @param mixed $key
*
* @return mixed|null
*/
public function remove($key)
{
if (!\array_key_exists($key, $this->elements)) {
return;
}
$removed = $this->elements[$key];
unset($this->elements[$key]);
return $removed;
}
/**
* @return bool
*/
public function isEmpty(): bool
{
return empty($this->elements);
}
/**
* @param mixed $element
*
* @return bool
*/
public function contains($element): bool
{
return \in_array($element, $this->elements, true);
}
/**
* @param mixed $element
*
* @return mixed|false
*/
public function indexOf($element)
{
return \array_search($element, $this->elements, true);
}
/**
* @param mixed $key
*
* @return bool
*/
public function containsKey($key): bool
{
return \array_key_exists($key, $this->elements);
}
/**
* Count elements of an object
*
* @return int The count as an integer.
*/
public function count(): int
{
return \count($this->elements);
}
/**
* Whether an offset exists
*
* @param mixed $offset An offset to check for.
*
* @return bool true on success or false on failure.
*/
public function offsetExists($offset): bool
{
return $this->containsKey($offset);
}
/**
* Offset to retrieve
*
* @param mixed $offset The offset to retrieve.
*
* @return mixed
*/
public function offsetGet($offset)
{
return $this->get($offset);
}
/**
* Offset to set
*
* @param mixed $offset The offset to assign the value to.
* @param mixed $value The value to set.
*
* @return void
*/
public function offsetSet($offset, $value)
{
if ($offset === null) {
$this->add($value);
} else {
$this->set($offset, $value);
}
}
/**
* Offset to unset
*
* @param mixed $offset The offset to unset.
*
* @return void
*/
public function offsetUnset($offset)
{
$this->remove($offset);
}
/**
* Returns a subset of the array
*
* @param int $offset
* @param int|null $length
*
* @return array
*/
public function slice(int $offset, ?int $length = null): array
{
return \array_slice($this->elements, $offset, $length, true);
}
/**
* @return array
*/
public function toArray(): array
{
return $this->elements;
}
/**
* @param array $elements
*
* @return $this
*/
public function replaceWith(array $elements)
{
$this->elements = $elements;
return $this;
}
public function removeGaps()
{
$this->elements = \array_filter($this->elements);
}
}
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