<?php
/**
 * $Id$
 *
 * The contents of this file are subject to the KnowledgeTree Public
 * License Version 1.1.2 ("License"); You may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://www.knowledgetree.com/KPL
 * 
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.
 * See the License for the specific language governing rights and
 * limitations under the License.
 *
 * All copies of the Covered Code must include on each user interface screen:
 *    (i) the "Powered by KnowledgeTree" logo and
 *    (ii) the KnowledgeTree copyright notice
 * in the same form as they appear in the distribution.  See the License for
 * requirements.
 * 
 * The Original Code is: KnowledgeTree Open Source
 * 
 * The Initial Developer of the Original Code is The Jam Warehouse Software
 * (Pty) Ltd, trading as KnowledgeTree.
 * Portions created by The Jam Warehouse Software (Pty) Ltd are Copyright
 * (C) 2007 The Jam Warehouse Software (Pty) Ltd;
 * All Rights Reserved.
 * Contributor( s): ______________________________________
 *
 */

require_once(KT_LIB_DIR . '/workflow/workflowutil.inc.php');
require_once(KT_LIB_DIR . '/triggers/triggerregistry.inc.php');

require_once(KT_LIB_DIR . '/database/dbutil.inc');
require_once(KT_LIB_DIR . '/util/ktutil.inc');

class KTWorkflowAssociationPlugin extends KTPlugin {
    var $sNamespace = "ktstandard.workflowassociation.plugin";
    var $sFriendlyName = null;
    var $sHelpPage = 'ktcore/admin/automatic workflows';

    function KTWorkflowAssociationPlugin($sFilename = null) {
        $res = parent::KTPlugin($sFilename);
        $this->sFriendlyName = _kt('Workflow Association Plugin');
        return $res;
    }    

    function setup() {
        $this->registerTrigger('add', 'postValidate', 'KTWADAddTrigger',
            'ktstandard.triggers.workflowassociation.addDocument');    
        $this->registerTrigger('moveDocument', 'postValidate', 'KTWADMoveTrigger',
            'ktstandard.triggers.workflowassociation.moveDocument');
        $this->registerTrigger('edit', 'postValidate', 'KTWADEditTrigger',
            'ktstandard.triggers.workflowassociation.editDocument');
        $this->registerAdminPage('workflow_allocation', 'WorkflowAllocationSelection', 
            'documents', _kt('Automatic Workflow Assignments'), 
            _kt('Configure how documents are allocated to workflows.'), 'workflow/adminpage.php');        
            $this->registeri18n('knowledgeTree', KT_DIR . '/i18n');
    }
}

// base class for delegation.
class KTWorkflowAssociationDelegator {
    var $_handler;
    var $_document;

    function KTWorkflowAssociationDelegator() {
        $oKTTriggerRegistry = KTTriggerRegistry::getSingleton();
        $aTriggers = $oKTTriggerRegistry->getTriggers('workflow', 'objectModification');
        
        // if we have _some_ triggers.
        if (!empty($aTriggers)) {
            $sQuery = 'SELECT selection_ns FROM ' . KTUtil::getTableName('trigger_selection');
            $sQuery .= ' WHERE event_ns = ?';
            $aParams = array('ktstandard.workflowassociation.handler');
            $res = DBUtil::getOneResultKey(array($sQuery, $aParams), 'selection_ns');
        
            if (PEAR::isError($res)) { $this->_handler = new KTWorkflowAssociationHandler(); }
            
            if (array_key_exists($res, $aTriggers)) {
                $this->_handler = new $aTriggers[$res][0];
            }
            else {
                $this->_handler = new KTWorkflowAssociationHandler();                 
            }
        }
        else {
            $this->_handler = new KTWorkflowAssociationHandler(); 
        }
    }
    
    function applyWorkflow($oWorkflow) {
        return true;
    }
    
    function setInfo($aOptions) {
        $this->_document = $aOptions['document'];
    }
     
    function postValidate() {
        return KTWorkflowUtil::getWorkflowForDocument($this->_document);
    }
}

// Add
class KTWADAddTrigger extends KTWorkflowAssociationDelegator {
    function postValidate() {
        $oWorkflow = $this->_handler->addTrigger($this->_document);
        
        // catch disabled workflows.
        if (!is_null($oWorkflow) && (PEAR::isError($oWorkflow) || ($oWorkflow->getStartStateId() === null))) {
            return ;          
        }
        
        $ret = KTWorkflowUtil::changeWorkflowOnDocument($oWorkflow, $this->_document);
    }
}

// Edit
class KTWADEditTrigger extends KTWorkflowAssociationDelegator {
    function postValidate() {
        $oWorkflow = $this->_handler->editTrigger($this->_document);
        
        // catch disabled workflows.
        if (!is_null($oWorkflow) && (PEAR::isError($oWorkflow) || ($oWorkflow->getStartStateId() === null))) {
            return ;          
        }
                
        $ret = KTWorkflowUtil::changeWorkflowOnDocument($oWorkflow, $this->_document);
    }
}

// Move
class KTWADMoveTrigger extends KTWorkflowAssociationDelegator {
    function postValidate() {
        $oWorkflow = $this->_handler->moveTrigger($this->_document);
        
        // catch disabled workflows.
        if (!is_null($oWorkflow) && (PEAR::isError($oWorkflow) || ($oWorkflow->getStartStateId() === null))) {
            return ;          
        }
                
        $ret = KTWorkflowUtil::changeWorkflowOnDocument($oWorkflow, $this->_document);
    }
}

// "base class" for fallback.  should be subclassed and cross-referenced, otherwise 
// has no impact when called.
class KTWorkflowAssociationHandler {
    function addTrigger($oDocument) { return KTWorkflowUtil::getWorkflowForDocument($oDocument); }
    function editTrigger($oDocument) { return KTWorkflowUtil::getWorkflowForDocument($oDocument); }
    function moveTrigger($oDocument) { return KTWorkflowUtil::getWorkflowForDocument($oDocument); }
}


$oPluginRegistry =& KTPluginRegistry::getSingleton();
$oPluginRegistry->registerPlugin('KTWorkflowAssociationPlugin', 'ktstandard.workflowassociation.plugin', __FILE__);


/* include others */

require_once(KT_DIR . '/plugins/ktstandard/workflow/TypeAssociator.php');
require_once(KT_DIR . '/plugins/ktstandard/workflow/FolderAssociator.php');

?>