mlanthaler: Changed the name of DataObject::add_extension() to DataObject::addExtension() (to have consistent method names) and added the a Member::addRole().

ischommer: Functionality moved to Object, and DataObject::addExtension is NOT consistent naming! (static methods coding conventions)
Now everything is as described in http://doc.silverstripe.com/doku.php?id=member#new_ideamember_role_decorator. 
(merged from branches/gsoc)


git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/trunk@41841 467b73ca-7a2a-4603-9d3b-597d59a354a9

security/Member.php

@@ -460,7 +460,7 @@ class Member extends DataObject {
 	 */
 	public function Groups() {
 		$groups = $this->getManyManyComponents("Groups");
-		
+
 		$unsecure = DataObject::get("Group_Unsecure", "");
 		if($unsecure) {
 			foreach($unsecure as $unsecureItem) {
@@ -636,14 +636,30 @@ class Member extends DataObject {
 				//new TextField( "Organisation", "Organisation" ),
 				//new OptionsetField("HTMLEmail","Mail Format", array( 1 => 'HTML', 0 => 'Text only' ) )
 			);
-			
+
 		$this->extend('updateCMSFields', $fields);
 		// if($this->hasMethod('updateCMSFields')) $this->updateCMSFields($fields);
-		
+
 		return $fields;
 	}
 
 
+	/**
+	 * Add an extension to the Member class
+	 *
+	 * This method can be used to add behaviour to Member class. The extension
+	 * affects the entire class - all members will get the additional
+	 * behaviour. However, if you want to restrict things, you should add
+	 * appropriate Permission::checkMember() calls to the extensions's
+	 * methods.
+	 *
+	 * @param string $extensionName Class name of the extension to add
+	 */
+	public static function add_role($extensionName) {
+		DataObject::add_extension('Member', $extensionName);
+	}
+
+
 	/**
 	 * Unsubscribe from newsletter
 	 *