--- a/busui/owa/modules/base/classes/update.php
+++ b/busui/owa/modules/base/classes/update.php
@@ -1,1 +1,207 @@
-
+<?php
+
+//
+// Open Web Analytics - An Open Source Web Analytics Framework
+//
+// Copyright 2006 - 2010 Peter Adams. All rights reserved.
+//
+// Licensed under GPL v2.0 http://www.gnu.org/copyleft/gpl.html
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// $Id$
+//
+
+/**
+ * Abstract Update Class
+ * 
+ * Performs an Update for a specific module
+ *
+ * @author      Peter Adams <peter@openwebanalytics.com>
+ * @copyright   Copyright &copy; 2008 Peter Adams <peter@openwebanalytics.com>
+ * @license     http://www.gnu.org/copyleft/gpl.html GPL v2.0
+ * @category    owa
+ * @package     owa
+ * @version		$Revision$	      
+ * @since		owa 1.0.0
+ */
+
+class owa_update extends owa_base {
+	
+	/**
+	 * Module Name
+	 *
+	 * Name of the module that his update is invoked under. This is set by the
+	 * factory.
+	 *
+	 * @var string
+	 */
+	var $module_name;
+	
+	/**
+	 * Schema Version Number
+	 *
+	 * Version number of the schema that will be in place after update is applied.
+	 *
+	 * This is set by the module's update method from the concrete class filename 
+	 * when it creates the concrete version of this update class.  This ensures 
+	 * that the schema version number is only set in one place (the file name) and 
+	 * that only one concrete update class can ever be applied for a particular 
+	 * schema version.
+	 *
+	 * @var integer
+	 */
+	var $schema_version;
+	
+	var $is_cli_mode_required;
+	
+	function __construct() {
+				
+		return parent::__construct();
+	}
+	
+	function isCliModeRequired() {
+		
+		return $this->is_cli_mode_required;
+	}
+	
+	/**
+	 * Applies an update
+	 *
+	 * @return boolean
+	 */
+	function apply() {
+		
+		// check for schema version. abort if not present or else updates will get out of sync.
+		if (empty($this->schema_version)) {
+			$this->e->notice(sprintf("Aborting %s Update (%s): Schema Version Number is not set.", get_class(), $this->module_name));
+			return false;
+		}
+		
+		$current_version = $this->c->get($this->module_name, 'schema_version');
+		
+		// check to see that you are applying an update that was successfully applied
+		if ($current_version === $this->schema_version) { 
+			$this->e->notice(sprintf("Aborting %s Update (%s): Update has already ben applied.", get_class(), $this->module_name));
+			return false;
+		}
+		
+		// execute pre update proceadure
+		$ret = $this->pre();
+		
+		if ($ret == true):
+		
+			$this->e->notice("Pre Update Proceadure Suceeded");
+			
+			// execute actual update proceadure
+			$ret = $this->up();
+	
+			if ($ret == true):
+			
+				// execute post update proceadure
+				$ret = $this->post();
+		
+				if ($ret == true):
+					$this->e->notice("Post Update Proceadure Suceeded");
+					$this->c->persistSetting($this->module_name, 'schema_version', $this->schema_version);
+					$this->c->save();
+					return true;
+				else:
+					$this->e->notice("Post Update Proceadure Failed");
+					return false;
+				endif;
+			else:
+				$this->e->notice("Update Proceadure Failed");
+				return false;
+			endif;
+		else:
+			$this->e->notice("Pre Update Proceadure Failed");
+			return false;
+		endif;
+		
+	}
+	
+	
+	/**
+	 * Rollsback an update
+	 *
+	 * @return boolean
+	 */
+	function rollback() {
+		
+		$current_version = $this->c->get($this->module_name, 'schema_version');
+		
+		// check to see that you are rolling back either an update that was successfully applied or one that might have failed.
+		// we dont want people applying rollbacks out of sequence.
+		if ($current_version === $this->schema_version || $current_version === $this->schema_version - 1) {
+			$ret = $this->down();
+			if ($ret) {
+				// only touch the current schema number if needed
+				
+				$prior_version = $current_version - 1;
+
+				if ($current_version === $this->schema_version) {
+					$this->c->persistSetting($this->module_name, 'schema_version', $prior_version);
+					$this->c->save();
+					$this->e->notice("Rollback succeeded to version: $prior_version.");
+				} else {
+					$this->e->notice("Rollback succeeded to version: $current_version.");
+				}
+				
+			} else {
+				$this->e->notice("Rollback failed.");
+			}			
+		} else {
+			$this->e->notice(sprintf('Rollback of update %s cannot be applied because it does not appear that it update %s has been applied to your instance. Your current schema version is only %s', $this->schema_version, $this->schema_version, $current_version));
+		}
+		
+		return true;
+	}
+	
+	/**
+	 * Abstract Pre-update hook
+	 *
+	 * @return boolean
+	 */
+	function pre() {
+		
+		return true;
+	}
+	
+	/**
+	 * Abstract Post-update hook
+	 *
+	 * @return boolean
+	 */
+	function post() {
+		
+		return true;
+	}
+	
+	/**
+	 * Abstract Method for update 
+	 *
+	 * @return boolean
+	 */
+	function up() {
+	
+		return false;
+	}
+	
+	/**
+	 * Abstract Method for reversing an update
+	 *
+	 * @return boolean
+	 */
+	function down() {
+		
+		return false;
+	}
+		
+}
+
+?>