Minor adjustments to make configuration easier

common/framework/drivers/sms/base.php

@@ -21,6 +21,7 @@ abstract class Base implements \Rhymix\Framework\Drivers\SMSInterface
 	 * Config keys used by this driver are stored here.
 	 */
 	protected static $_required_config = array();
+	protected static $_optional_config = array();
 	
 	/**
 	 * Direct invocation of the constructor is not permitted.
@@ -61,6 +62,16 @@ abstract class Base implements \Rhymix\Framework\Drivers\SMSInterface
 		return static::$_required_config;
 	}
 	
+	/**
+	 * Get the list of configuration fields optionally used by this SMS driver.
+	 * 
+	 * @return array
+	 */
+	public static function getOptionalConfig()
+	{
+		return static::$_optional_config;
+	}
+	
 	/**
 	 * Get the list of API types supported by this SMS driver.
 	 * 
@@ -90,7 +101,7 @@ abstract class Base implements \Rhymix\Framework\Drivers\SMSInterface
 	 */
 	public static function isSupported()
 	{
-		return true;
+		return false;
 	}
 	
 	/**

common/framework/drivers/sms/coolsms.php

@@ -35,7 +35,20 @@ class CoolSMS extends Base implements \Rhymix\Framework\Drivers\SMSInterface
 	/**
 	 * Config keys used by this driver are stored here.
 	 */
-	protected static $_required_config = array('api_key', 'api_secret', 'sender_key');
+	protected static $_required_config = array('api_key', 'api_secret');
+	protected static $_optional_config = array('sender_key');
+	
+	/**
+	 * Check if the current SMS driver is supported on this server.
+	 * 
+	 * This method returns true on success and false on failure.
+	 * 
+	 * @return bool
+	 */
+	public static function isSupported()
+	{
+		return true;
+	}
 	
 	/**
 	 * Send a message.

common/framework/drivers/sms/dummy.php

@@ -37,6 +37,18 @@ class Dummy extends Base implements \Rhymix\Framework\Drivers\SMSInterface
 	 */
 	protected $_sent_messages = array();
 	
+	/**
+	 * Check if the current SMS driver is supported on this server.
+	 * 
+	 * This method returns true on success and false on failure.
+	 * 
+	 * @return bool
+	 */
+	public static function isSupported()
+	{
+		return true;
+	}
+	
 	/**
 	 * Send a message.
 	 *