more refactoring on the framework.

laravel/cache/drivers/file.php

@@ -0,0 +1,85 @@
+<?php namespace Laravel\Cache\Drivers;
+
+class File extends Driver {
+
+	/**
+	 * The file engine instance.
+	 *
+	 * @var Laravel\File
+	 */
+	private $file;
+
+	/**
+	 * The path to which the cache files should be written.
+	 *
+	 * @var string
+	 */
+	private $path;
+
+	/**
+	 * Create a new File cache driver instance.
+	 *
+	 * @param  Laravel\File  $file
+	 * @param  string        $path
+	 * @return void
+	 */
+	public function __construct(\Laravel\File $file, $path)
+	{
+		$this->file = $file;
+		$this->path = $path;
+	}
+
+	/**
+	 * Determine if an item exists in the cache.
+	 *
+	 * @param  string  $key
+	 * @return bool
+	 */
+	public function has($key)
+	{
+		return ( ! is_null($this->get($key)));
+	}
+
+	/**
+	 * Retrieve an item from the cache driver.
+	 *
+	 * @param  string  $key
+	 * @return mixed
+	 */
+	protected function retrieve($key)
+	{
+		if ( ! $this->file->exists($this->path.$key)) return null;
+
+		if (time() >= substr($cache = $this->file->get($this->path.$key), 0, 10))
+		{
+			return $this->forget($key);
+		}
+
+		return unserialize(substr($cache, 10));
+	}
+
+	/**
+	 * Write an item to 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)
+	{
+		$this->file->put($this->path.$key, (time() + ($minutes * 60)).serialize($value));
+	}
+
+	/**
+	 * Delete an item from the cache.
+	 *
+	 * @param  string  $key
+	 * @return void
+	 */
+	public function forget($key)
+	{
+		$this->file->delete($this->path.$key);
+	}
+
+}