<?php namespace Illuminate\Cache;

class ArrayStore extends TaggableStore implements StoreInterface {

	/**
	 * The array of stored values.
	 *
	 * @var array
	 */
	protected $storage = array();

	/**
	 * Retrieve an item from the cache by key.
	 *
	 * @param  string  $key
	 * @return mixed
	 */
	public function get($key)
	{
		if (array_key_exists($key, $this->storage))
		{
			return $this->storage[$key];
		}
	}

	/**
	 * Store an item in the cache for a given number of minutes.
	 *
	 * @param  string  $key
	 * @param  mixed   $value
	 * @param  int     $minutes
	 * @return void
	 */
	public function put($key, $value, $minutes)
	{
		$this->storage[$key] = $value;
	}

	/**
	 * Increment the value of an item in the cache.
	 *
	 * @param  string  $key
	 * @param  mixed   $value
	 * @return void
	 */
	public function increment($key, $value = 1)
	{
		$this->storage[$key] = $this->storage[$key] + $value;

		return $this->storage[$key];
	}

	/**
	 * Increment the value of an item in the cache.
	 *
	 * @param  string  $key
	 * @param  mixed   $value
	 * @return void
	 */
	public function decrement($key, $value = 1)
	{
		$this->storage[$key] = $this->storage[$key] - $value;

		return $this->storage[$key];
	}

	/**
	 * Store an item in the cache indefinitely.
	 *
	 * @param  string  $key
	 * @param  mixed   $value
	 * @return void
	 */
	public function forever($key, $value)
	{
		return $this->put($key, $value, 0);
	}

	/**
	 * Remove an item from the cache.
	 *
	 * @param  string  $key
	 * @return void
	 */
	public function forget($key)
	{
		unset($this->storage[$key]);
	}

	/**
	 * Remove all items from the cache.
	 *
	 * @return void
	 */
	public function flush()
	{
		$this->storage = array();
	}

	/**
	 * Get the cache key prefix.
	 *
	 * @return string
	 */
	public function getPrefix()
	{
		return '';
	}

}