Add dummy cache driver to use if no cache is configured

common/framework/drivers/cache/dummy.php

@@ -0,0 +1,178 @@
+<?php
+
+namespace Rhymix\Framework\Drivers\Cache;
+
+/**
+ * The dummy cache driver.
+ */
+class Dummy implements \Rhymix\Framework\Drivers\CacheInterface
+{
+	/**
+	 * Dummy data is stored here.
+	 */
+	public $data = array();
+	
+	/**
+	 * Create a new instance of the current cache driver, using the given settings.
+	 * 
+	 * @param array $config
+	 * @return void
+	 */
+	public function __construct(array $config)
+	{
+		
+	}
+	
+	/**
+	 * Check if the current cache driver is supported on this server.
+	 * 
+	 * This method returns true on success and false on failure.
+	 * 
+	 * @return bool
+	 */
+	public function isSupported()
+	{
+		return true;
+	}
+	
+	/**
+	 * Validate cache settings.
+	 * 
+	 * This method returns true on success and false on failure.
+	 * 
+	 * @param mixed $config
+	 * @return bool
+	 */
+	public static function validateSettings($config)
+	{
+		return true;
+	}
+	
+	/**
+	 * Get the value of a key.
+	 * 
+	 * This method returns null if the key was not found.
+	 * 
+	 * @param string $key
+	 * @return mixed
+	 */
+	public function get($key)
+	{
+		if (isset($this->data[$key]))
+		{
+			if ($this->data[$key][0] > 0 && $this->data[$key][0] < time())
+			{
+				unset($this->data[$key]);
+				return null;
+			}
+			return $this->data[$key][1];
+		}
+		else
+		{
+			return null;
+		}
+	}
+	
+	/**
+	 * Set the value to a key.
+	 * 
+	 * This method returns true on success and false on failure.
+	 * $ttl is measured in seconds. If it is zero, the key should not expire.
+	 * 
+	 * @param string $key
+	 * @param mixed $value
+	 * @param int $ttl
+	 * @return bool
+	 */
+	public function set($key, $value, $ttl)
+	{
+		$this->data[$key] = array($ttl ? (time() + $ttl) : 0, $value);
+		return true;
+	}
+	
+	/**
+	 * Delete a key.
+	 * 
+	 * This method returns true on success and false on failure.
+	 * If the key does not exist, it should return false.
+	 * 
+	 * @param string $key
+	 * @return bool
+	 */
+	public function delete($key)
+	{
+		if (isset($this->data[$key]))
+		{
+			unset($this->data[$key]);
+			return true;
+		}
+		else
+		{
+			return false;
+		}
+	}
+	
+	/**
+	 * Check if a key exists.
+	 * 
+	 * This method returns true on success and false on failure.
+	 * 
+	 * @param string $key
+	 * @return bool
+	 */
+	public function exists($key)
+	{
+		return isset($this->data[$key]);
+	}
+	
+	/**
+	 * Increase the value of a key by $amount.
+	 * 
+	 * If the key does not exist, this method assumes that the current value is zero.
+	 * This method returns the new value.
+	 * 
+	 * @param string $key
+	 * @param int $amount
+	 * @return int
+	 */
+	public function incr($key, $amount)
+	{
+		if (isset($this->data[$key]))
+		{
+			$this->data[$key][1] += $amount;
+			return $this->data[$key][1];
+		}
+		else
+		{
+			$this->set($key, $amount, 0);
+			return $amount;
+		}
+	}
+	
+	/**
+	 * Decrease the value of a key by $amount.
+	 * 
+	 * If the key does not exist, this method assumes that the current value is zero.
+	 * This method returns the new value.
+	 * 
+	 * @param string $key
+	 * @param int $amount
+	 * @return int
+	 */
+	public function decr($key, $amount)
+	{
+		return $this->incr($key, 0 - $amount);
+	}
+	
+	/**
+	 * Clear all keys from the cache.
+	 * 
+	 * This method returns true on success and false on failure.
+	 * 
+	 * @return bool
+	 */
+	public function clear()
+	{
+		$this->data = array();
+	}
+}