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✏️ Editing: MockCache.php

<?php

/**
 * This file is part of the CodeIgniter 4 framework.
 *
 * (c) CodeIgniter Foundation <admin@codeigniter.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace CodeIgniter\Test\Mock;

use CodeIgniter\Cache\CacheInterface;
use CodeIgniter\Cache\Handlers\BaseHandler;
use Closure;

class MockCache extends BaseHandler implements CacheInterface
{
	/**
	 * Mock cache storage.
	 *
	 * @var array
	 */
	protected $cache = [];

/**
	 * Expiration times.
	 *
	 * @var ?int[]
	 */
	protected $expirations = [];

//--------------------------------------------------------------------

/**
	 * Takes care of any handler-specific setup that must be done.
	 */
	public function initialize()
	{
	}

//--------------------------------------------------------------------

/**
	 * Attempts to fetch an item from the cache store.
	 *
	 * @param string $key Cache item name
	 *
	 * @return mixed
	 */
	public function get(string $key)
	{
		$key = static::validateKey($key, $this->prefix);

return array_key_exists($key, $this->cache)
			? $this->cache[$key]
			: null;
	}

//--------------------------------------------------------------------

/**
	 * Get an item from the cache, or execute the given Closure and store the result.
	 *
	 * @param string  $key      Cache item name
	 * @param integer $ttl      Time to live
	 * @param Closure $callback Callback return value
	 *
	 * @return mixed
	 */
	public function remember(string $key, int $ttl, Closure $callback)
	{
		$value = $this->get($key);

if (! is_null($value))
		{
			return $value;
		}

$this->save($key, $value = $callback(), $ttl);

return $value;
	}

//--------------------------------------------------------------------

/**
	 * Saves an item to the cache store.
	 *
	 * The $raw parameter is only utilized by Mamcache in order to
	 * allow usage of increment() and decrement().
	 *
	 * @param string  $key   Cache item name
	 * @param mixed   $value the data to save
	 * @param integer $ttl   Time To Live, in seconds (default 60)
	 * @param boolean $raw   Whether to store the raw value.
	 *
	 * @return boolean
	 */
	public function save(string $key, $value, int $ttl = 60, bool $raw = false)
	{
		$key = static::validateKey($key, $this->prefix);

$this->cache[$key]       = $value;
		$this->expirations[$key] = $ttl > 0 ? time() + $ttl : null;

return true;
	}

//--------------------------------------------------------------------

/**
	 * Deletes a specific item from the cache store.
	 *
	 * @param string $key Cache item name
	 *
	 * @return boolean
	 */
	public function delete(string $key)
	{
		$key = static::validateKey($key, $this->prefix);

if (! isset($this->cache[$key]))
		{
			return false;
		}

unset($this->cache[$key]);
		unset($this->expirations[$key]);

return true;
	}

//--------------------------------------------------------------------

/**
	 * Deletes items from the cache store matching a given pattern.
	 *
	 * @param string $pattern Cache items glob-style pattern
	 *
	 * @return integer
	 */
	public function deleteMatching(string $pattern)
	{
		$count = 0;
		foreach (array_keys($this->cache) as $key)
		{
			if (fnmatch($pattern, $key))
			{
				$count++;
				unset($this->cache[$key]);
				unset($this->expirations[$key]);
			}
		}

return $count;
	}

//--------------------------------------------------------------------

/**
	 * Performs atomic incrementation of a raw stored value.
	 *
	 * @param string  $key    Cache ID
	 * @param integer $offset Step/value to increase by
	 *
	 * @return boolean
	 */
	public function increment(string $key, int $offset = 1)
	{
		$key  = static::validateKey($key, $this->prefix);
		$data = $this->cache[$key] ?: null;

if (empty($data))
		{
			$data = 0;
		}
		elseif (! is_int($data))
		{
			return false;
		}

return $this->save($key, $data + $offset);
	}

//--------------------------------------------------------------------

/**
	 * Performs atomic decrementation of a raw stored value.
	 *
	 * @param string  $key    Cache ID
	 * @param integer $offset Step/value to increase by
	 *
	 * @return boolean
	 */
	public function decrement(string $key, int $offset = 1)
	{
		$key = static::validateKey($key, $this->prefix);

$data = $this->cache[$key] ?: null;

if (empty($data))
		{
			$data = 0;
		}
		elseif (! is_int($data))
		{
			return false;
		}

return $this->save($key, $data - $offset);
	}

//--------------------------------------------------------------------

/**
	 * Will delete all items in the entire cache.
	 *
	 * @return boolean
	 */
	public function clean()
	{
		$this->cache       = [];
		$this->expirations = [];

return true;
	}

//--------------------------------------------------------------------

/**
	 * Returns information on the entire cache.
	 *
	 * The information returned and the structure of the data
	 * varies depending on the handler.
	 *
	 * @return string[] Keys currently present in the store
	 */
	public function getCacheInfo()
	{
		return array_keys($this->cache);
	}

//--------------------------------------------------------------------

/**
	 * Returns detailed information about the specific item in the cache.
	 *
	 * @param string $key Cache item name.
	 *
	 * @return array|null
	 *   Returns null if the item does not exist, otherwise array<string, mixed>
	 *   with at least the 'expire' key for absolute epoch expiry (or null).
	 */
	public function getMetaData(string $key)
	{
		// Misses return null
		if (! array_key_exists($key, $this->expirations))
		{
			return null;
		}

// Count expired items as a miss
		if (is_int($this->expirations[$key]) && $this->expirations[$key] > time())
		{
			return null;
		}

return [
			'expire' => $this->expirations[$key],
		];
	}

//--------------------------------------------------------------------

/**
	 * Determines if the driver is supported on this system.
	 *
	 * @return boolean
	 */
	public function isSupported(): bool
	{
		return true;
	}

//--------------------------------------------------------------------

}

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