Implement sectionable caching in array cache driver.

laravel/cache/drivers/memory.php

 <?php namespace Laravel\Cache\Drivers;
 
-class Memory extends Driver {
+class Memory extends Driver implements Sectionable {
 
 	/**
 	 * The in-memory array of cached items.
@@ -28,10 +28,22 @@ class Memory extends Driver {
 	 */
 	protected function retrieve($key)
 	{
-		if (array_key_exists($key, $this->storage))
-		{
-			return $this->storage[$key];
-		}
+		return array_get($this->storage, $key);
+	}
+
+	/**
+	 * Retrieve a sectioned item from the cache driver.
+	 *
+	 * @param  string  $section
+	 * @param  string  $key
+	 * @param  mixed   $default
+	 * @return mixed
+	 */
+	public function get_from_section($section, $key, $default = null)
+	{
+		$key = $this->section_item_key($section, $key);
+
+		return array_get($this->storage, $key, $default);
 	}
 
 	/**
@@ -49,7 +61,21 @@ class Memory extends Driver {
 	 */
 	public function put($key, $value, $minutes)
 	{
-		$this->storage[$key] = $value;
+		array_set($this->storage, $key, $value);
+	}
+
+	/**
+	 * Write a sectioned item to the cache.
+	 *
+	 * @param  string  $section
+	 * @param  string  $key
+	 * @param  mixed   $value
+	 * @param  int     $minutes
+	 * @return void
+	 */
+	public function put_in_section($section, $key, $value, $minutes)
+	{
+		$this->put($this->section_item_key($section, $key), $value, $minutes);
 	}
 
 	/**
@@ -64,6 +90,48 @@ class Memory extends Driver {
 		$this->put($key, $value, 0);
 	}
 
+	/**
+	 * Write a sectioned item to the cache that lasts forever.
+	 *
+	 * @param  string  $section
+	 * @param  string  $key
+	 * @param  mixed   $value
+	 * @return void
+	 */
+	public function forever_in_section($section, $key, $value)
+	{
+		$this->put_in_section($section, $key, $value, 0);
+	}
+
+	/**
+	 * Get a sectioned item from the cache, or cache and return the default value.
+	 *
+	 * @param  string  $section
+	 * @param  string  $key
+	 * @param  mixed   $default
+	 * @param  int     $minutes
+	 * @return mixed
+	 */
+	public function remember_in_section($section, $key, $default, $minutes, $function = 'put')
+	{
+		$key = $this->section_item_key($section, $key);
+
+		return $this->remember($key, $default, $minutes, $function);
+	}
+
+	/**
+	 * Get a sectioned item from the cache, or cache the default value forever.
+	 *
+	 * @param  string  $section
+	 * @param  string  $key
+	 * @param  mixed   $default
+	 * @return mixed
+	 */
+	public function sear_in_section($section, $key, $default)
+	{
+		return $this->sear($this->section_item_key($section, $key), $default);
+	}
+
 	/**
 	 * Delete an item from the cache.
 	 *
@@ -72,7 +140,30 @@ class Memory extends Driver {
 	 */
 	public function forget($key)
 	{
-		unset($this->storage[$key]);
+		array_forget($this->storage, $key);
+	}
+
+	/**
+	 * Delete a sectioned item from the cache.
+	 *
+	 * @param  string  $section
+	 * @param  string  $key
+	 * @return void
+	 */
+	public function forget_in_section($section, $key)
+	{
+		$this->forget($this->section_item_key($section, $key));
+	}
+
+	/**
+	 * Delete an entire section from the cache.
+	 *
+	 * @param  string    $section
+	 * @return int|bool
+	 */
+	public function forget_section($section)
+	{
+		array_forget($this->storage, 'section#'.$section);
 	}
 
 	/**
@@ -85,4 +176,16 @@ class Memory extends Driver {
 		$this->storage = array();
 	}
 
+	/**
+	 * Get a section item key for a given section and key.
+	 *
+	 * @param  string  $section
+	 * @param  string  $key
+	 * @return string
+	 */
+	protected function section_item_key($section, $key)
+	{
+		return "section#{$section}.{$key}";
+	}
+
 }
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