<?php

/**
 * $Id$
 *
 * KnowledgeTree Community Edition
 * Document Management Made Simple
 * Copyright (C) 2008, 2009 KnowledgeTree Inc.
 * John
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License version 3 as published by the
 * Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * You can contact KnowledgeTree Inc., PO Box 7775 #87847, San Francisco,
 * California 94120-7775, or email info@knowledgetree.com.
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU General Public License version 3.
 *
 * In accordance with Section 7(b) of the GNU General Public License version 3,
 * these Appropriate Legal Notices must retain the display of the "Powered by
 * KnowledgeTree" logo and retain the original copyright notice. If the display of the
 * logo is not reasonably feasible for technical reasons, the Appropriate Legal Notices
 * must display the words "Powered by KnowledgeTree" and retain the original
 * copyright notice.
 * Contributor( s): ______________________________________
 *
 */

require_once(KT_LIB_DIR . '/actions/actionregistry.inc.php');
require_once(KT_LIB_DIR . '/workflow/workflowutil.inc.php');
require_once(KT_LIB_DIR . '/dispatcher.inc.php');
require_once(KT_LIB_DIR . '/browse/browseutil.inc.php');
require_once(KT_LIB_DIR . '/actions/entitylist.php');

require_once(KT_LIB_DIR . '/foldermanagement/folderutil.inc.php');
require_once(KT_LIB_DIR . '/documentmanagement/documentutil.inc.php');

require_once(KT_LIB_DIR . '/widgets/forms.inc.php');

require_once(KT_LIB_DIR . "/util/sanitize.inc");

// // Jarrett Jordaan: Deal with bulk action
require_once(KT_LIB_DIR . '/subscriptions/subscriptions.inc.php');

class KTBulkAction extends KTStandardDispatcher {
    var $sName;
    var $sDescription;

    var $_sDisablePermission;
    var $bAllowInAdminMode = false;
    var $sHelpPage = 'ktcore/browse.html';

    var $sSection = 'view_details';

    var $_bMutator = false;
    var $_bMutationAllowedByAdmin = true;

    var $sIconClass;

    // not 'sShowPermission' - mass actions are always shown
    // this is used to check against individual entities
    var $_sPermission = 'ktcore.permissions.read';

    // Bulk Action Notification
    var $uploadedDocs;
    var $uploadedFolders;
    var $eventAction;

    function KTBulkAction($oUser = null, $oPlugin = null) {
        $this->oEntityList = null;
        $this->oActiveEntityList = null;
        $this->oUser =& $oUser;
        $this->oPlugin =& $oPlugin;
        // Bulk Action Notification
        $this->uploadedDocs = array();
        $this->uploadedFolders = array();
        $this->eventAction = null;
        $this->aBreadcrumbs = array(
            array('action' => 'browse', 'name' => _kt('Browse')),
        );

        $this->persistParams('fEntityListCode');
        parent::KTStandardDispatcher();
    }

    function setEntityList(&$oEntityList) {
        $this->oEntityList =& $oEntityList;
    }

    function setUser(&$oUser) {
        $this->oUser =& $oUser;
    }

    function _show() {
        return true;
    }

    function getURL() {
        $oKTConfig =& KTConfig::getSingleton();
        $sExt = '.php';
        if (KTUtil::arrayGet($_SERVER, 'kt_no_extensions')) {
            $sExt = '';
        }
        if ($oKTConfig->get('KnowledgeTree/pathInfoSupport')) {
            return sprintf('%s/action%s/%s', $GLOBALS['KTRootUrl'], $sExt, $this->sName);
        } else {
            return sprintf('%s/action%s?kt_path_info=%s', $GLOBALS['KTRootUrl'], $sExt, $this->sName);
        }
    }

    function getInfo() {
        if ($this->_show() === false) {
            return null;
        }

        $url = $this->getURL();

        $aInfo = array(
            'description' => $this->sDescription,
            'name' => $this->getDisplayName(),
            'ns' => $this->sName,
            'url' => $url,
            'icon_class' => $this->sIconClass,
        );

        $aInfo = $this->customiseInfo($aInfo);
        return $aInfo;
    }

    function getName() {
        return sanitizeForSQLtoHTML($this->sName);
    }

    function getDisplayName() {
        return sanitizeForSQLtoHTML($this->sDisplayName);
    }

    function getDescription() {
        return sanitizeForSQLtoHTML($this->sDescription);
    }

    function customiseInfo($aInfo) {
        return $aInfo;
    }

    // helper function
    function _getNames($aIds, $sEntity) {
        if(count($aIds)) {
            $aNames = array();
            $aFunc = array($sEntity, 'get');

            foreach($aIds as $id) {
                $oE =& call_user_func($aFunc, $id);
                $name = array();
                $name['name'] = $oE->getName();
                //add shortcut notice if the entity is a shortcut
                if($oE->isSymbolicLink()){
                	$name['notice'] = _kt("Shortcut");
                }
                $aNames[] = $name;
            }
            return $aNames;
        } else {
            return array();
        }
    }

    /**
     * Checks if there are symlinks that are linking to items in the current list
     * Useful if you want to prompt the user with a confirmation because they're
     * automatically deleted when their targets are deleted or archived.
     *
     * @return boolean
     */
	function symlinksLinkingToCurrentList(){
		$symlinksPresent = false;
        foreach($this->oActiveEntityList->getDocumentIds() as $iDocument){
        	$oDocument = Document::get($iDocument);
        	if(count($oDocument->getSymbolicLinks()) > 0){
        		$symlinksPresent = true;
        		break;
        	}
        }
        if($symlinksPresent == false){
	        foreach($this->oActiveEntityList->getFolderIds() as $iFolder){
	        	$oStartFolder = Folder::get($iFolder);
	        	$aRemainingFolders = array($oStartFolder->getId());
	        	while (!empty($aRemainingFolders)) {
	        		$iFolderId = array_pop($aRemainingFolders);
	        		$oFolder = Folder::get($iFolderId);

		        	if(count($oFolder->getSymbolicLinks()) > 0){
		        		$symlinksPresent = true;
		        		break;
		        	}

	        		$aChildDocs = Document::getList(array('folder_id = ?',array($iFolderId)));
	        		foreach ($aChildDocs as $oDoc) {
				        if(count($oDoc->getSymbolicLinks()) > 0){
			        		$symlinksPresent = true;
			        		break;
			        	}
	        		}

	        		$aCFIds = Folder::getList(array('parent_id = ?', array($iFolderId)), array('ids' => true));
            		$aRemainingFolders = kt_array_merge($aRemainingFolders, $aCFIds);
	        	}
	        }
        }
        return $symlinksPresent;
	}

/**
     * checks a folderList for shortcuts and queries the repositories for all folders
     * that are somehow connected to these folders.
     */
    function getLinkingEntities($aFolderList){
    	$aSearchFolders = array();
    	if(!empty($aFolderList)){
            foreach($aFolderList as $oFolderItem){
            	if(Permission::userHasFolderReadPermission($oFolderItem)){
	                // If it is a shortcut, we should do some more searching
	                if($oFolderItem->isSymbolicLink()){
	                    $oFolderItem = $oFolderItem->getLinkedFolder();
	                    $aSearchFolders[] = $oFolderItem->getID();
	                }
            	}
             }
        }
    	$aLinkingFolders = array();
    	$aSearchCompletedFolders = array();
    	$count = 0;
        while(count($aSearchFolders)>0){
        	$count++;
        	$oFolder = Folder::get(array_pop($aSearchFolders));
        	$sFolderId = $oFolder->getId();
        	 // Get all the folders within the current folder
            $sWhereClause = "parent_folder_ids = '{$sFolderId}' OR
            parent_folder_ids LIKE '{$sFolderId},%' OR
            parent_folder_ids LIKE '%,{$sFolderId},%' OR
            parent_folder_ids LIKE '%,{$sFolderId}'";
            $aFolderList = $this->oFolder->getList($sWhereClause);
            foreach($aFolderList as $oFolderItem){
	            if($oFolderItem->isSymbolicLink()){
	            	$oFolderItem = $oFolderItem->getLinkedFolder();
	            }
				if(Permission::userHasFolderReadPermission($oFolderItem)){
		            if($aSearchCompletedFolders[$oFolderItem->getID()] != true){
	            		$aSearchFolders[] = $oFolderItem->getID();
	            		$aSearchCompletedFolders[$oFolderItem->getID()] = true;
	            	}
				}
            }
            if(!isset($aLinkingFolders[$oFolder->getId()])){
            	$aLinkingFolders[$oFolder->getId()] = $oFolder;
            }
        }
        return $aLinkingFolders;
    }

    // doesn't actually do checks, as they have to be performed per-entity
    function check() {
        // not necessarily coming from a folder...
        $iFolderId = KTUtil::arrayGet($_REQUEST, 'fFolderId', 1);
        $this->oFolder = Folder::get($iFolderId);
        //$this->oFolder =& $this->oValidator->validateFolder($_REQUEST['fFolderId']);

        $aOptions = array(
            'final' => false,
            'documentaction' => 'viewDocument',
            'folderaction' => 'browse',
        );

        $this->aBreadcrumbs = array(array('name'=>_kt('Bulk Actions')),
                                    array('name'=>$this->getDisplayName()));

        return true;
    }


    // check the entire entity list. this needn't be overrided at any point
    function check_entities() {
        $aFailed = array('documents' => array(), 'folders' => array());
        $aSucceeded = array('documents' => array(), 'folders' => array());

        if(!$this->oEntityList) {
            return true;
        }

        foreach($this->oEntityList->getDocumentIds() as $iId) {
            $oDocument =& Document::get($iId);

            if(PEAR::isError($oDocument)) {
                $aFailed['documents'][] = array($iId, _kt('No such document'));
            } else {
                $res = $this->check_entity($oDocument);

                // all these checks allow a return from check_entity of:
                // 1. a PEAR error, indicating failure, with the message in the error
                // 2. false, for unknown error
                // 3. true, to pass

                if(PEAR::isError($res)) {
                    $aFailed['documents'][] = array($oDocument->getName(), $res->getMessage());
                } else if($res === false) {
                    $aFailed['documents'][] = array($oDocument->getName(), _kt('Failed (unknown reason)'));
                } else {
                    $aSucceeded['documents'][] = $oDocument->getId();
                }
            }
        }

        foreach($this->oEntityList->getFolderIds() as $iId) {
            $oFolder =& Folder::get($iId);

            if(PEAR::isError($oFolder)) {
                $aFailed['folders'][] = array($iId, _kt('No such folder'));
            } else {
                $res = $this->check_entity($oFolder);

                if(PEAR::isError($res)) {
                    $aFailed['folders'][] = array($oFolder->getName(), $res->getMessage());
                } else if($res === false) {
                    $aFailed['folders'][] = array($oFolder->getName(), _kt('Failed (unknown reason)'));
                } else {
                    $aSucceeded['folders'][] = $oFolder->getId();
                }
            }
        }
        $this->oActiveEntityList = new KTEntityList($aSucceeded['documents'], $aSucceeded['folders']);
        $this->aFailed = $aFailed;

        return count($aSucceeded['documents']) + count($aSucceeded['folders']);
    }


    // iterate over all entites to act on them
    function perform_action_on_list() {
        $this->aActionResults = array('folders'=>array(), 'documents'=>array());
        foreach($this->oActiveEntityList->getDocumentIds() as $iId) {
            $oDocument =& Document::get($iId);
            // Store document
            $this->uploadedDocs[] = $oDocument;
            if(!PEAR::isError($oDocument)) {
                $sName = $oDocument->getName();
            } else {
                $sName = _kt('Error fetching document name');
            }

            $res = $this->perform_action($oDocument);

            //check for shortcut notice
            $notice = null;
            if($oDocument->isSymbolicLink()){
            	$notice = _kt("Shortcut");
            }

            if(PEAR::isError($res)) {
                $this->aActionResults['documents'][] = array($sName, $res->getMessage(), $notice);
            } else {
                // TODO better way of getting the bulk action type
                if($this->eventAction == null) {
                    $this->eventAction = $res;
                }
                $this->aActionResults['documents'][] = array($sName, _kt('Success'), $notice);
            }
        }

        // List of ducument objects
        $oFolderObjects = array();
        foreach($this->oActiveEntityList->getFolderIds() as $iId) {
            $oFolder =& Folder::get($iId);
            // Store folder
            $this->uploadedFolders[] = $oFolder;
            if(!PEAR::isError($oFolder)) {
                $sName = $oFolder->getName();
            } else {
                $sName = _kt('Error fetching folder name');
            }

            $res = $this->perform_action($oFolder);

        	//check for shortcut notice
            $notice = null;
            if($oFolder->isSymbolicLink()){
            	$notice = _kt("Shortcut");
            }

            if(PEAR::isError($res)) {
                $this->aActionResults['folders'][] = array($sName, $res->getMessage(), $notice);
            } else {
                // // TODO better way of getting the bulk action type
                if($this->eventAction == null) {
                    $this->eventAction = $res;
                }
                $this->aActionResults['folders'][] = array($sName, _kt('Success'), $notice);
            }
        }

    }


    // list persistance
    // fetch existing lists
    function get_lists() {
        $this->oEntityList = KTEntityList::retrieveList(KTUtil::arrayGet($_REQUEST, 'fListCode', null));
        $this->oActiveEntityList = KTEntityList::retrieveList(KTUtil::arrayGet($_REQUEST, 'fActiveListCode', null));
        if(PEAR::isError($this->oActiveEntityList)) {
            $this->oActiveEntityList = null;
        }
    }

    // persist
    function store_lists() {
        $this->persistParams(array('fListCode', 'fActiveListCode', 'fFolderId', 'fReturnData', 'fReturnAction'));
    }

    /**
     * Get the return url based on the return action and data
     */
    function getReturnUrl()
    {
        $sReturnAction = $_REQUEST['fReturnAction'];
        $sReturnData = $_REQUEST['fReturnData'];
        $sAction = 'main';
        $qs = '';

        switch ($sReturnAction){
            case 'browse':
                $sReturnData = (empty($sReturnData)) ? $_REQUEST['fFolderId'] : $sReturnData;
                $sTargetUrl = KTBrowseUtil::getUrlForFolder(Folder::get($sReturnData));
                break;
            case 'simpleSearch':
                $sTargetUrl = KTBrowseUtil::getSimpleSearchBaseUrl();
                $extra = 'fSearchableText='.$sReturnData;
                break;
            case 'booleanSearch':
                $sTargetUrl = KTBrowseUtil::getBooleanSearchBaseUrl();
                $sAction = 'performSearch';
                $extra = 'boolean_search_id='.$sReturnData;
                break;
            case 'search2':
                $sTargetUrl = KTBrowseUtil::getSearchResultURL();
                $sAction = 'searchResults';
                break;
            default:
                $sTargetUrl = $sReturnAction;
                $sAction = '';
        }

        $qs = (!empty($sAction))? 'action='.$sAction : '';
        $qs .= (!empty($extra))? '&'.$extra : '';
        $sTargetUrl = KTUtil::addQueryString($sTargetUrl, $qs);

        return $sTargetUrl;
    }

    // forms
    // form to list the entites after checking each one
    function form_listing() {
        $sListCode = $this->oEntityList->getCode();
        $sActiveListCode = $this->oActiveEntityList->getCode();

        $sTargetUrl = $this->getReturnUrl();

        $oForm = new KTForm;
        $oForm->setOptions(array(
            'identifier' => 'ktcore.actions.bulk.listing.form',
            'submit_label' => _kt('Continue'),
            'targeturl' => $this->getURL(),
            'action' => 'collectinfo',
            'fail_action' => 'main',
            'cancel_url' => $sTargetUrl,
            'noframe' => true,
            'extraargs' => array('fListCode' => $sListCode,
                                 'fActiveListCode' => $sActiveListCode,
                                 'fFolderId' => $this->oFolder->getId(),
                                 'fReturnAction' => KTUtil::arrayGet($_REQUEST, 'fReturnAction'),
                                 'fReturnData' => KTUtil::arrayGet($_REQUEST, 'fReturnData'),
                                 ),
            'context' => $this,
        ));
        return $oForm;
    }

    // form to show on action completion, and list results
    function form_complete() {
        $sReturnAction = KTUtil::arrayGet($_REQUEST, 'fReturnAction');
        $sReturnData = KTUtil::arrayGet($_REQUEST, 'fReturnData');
        $sAction = 'main';

        switch ($sReturnAction){
            case 'browse':
                $sReturnData = (empty($sReturnData)) ? $_REQUEST['fFolderId'] : $sReturnData;
                $sTargetUrl = KTBrowseUtil::getUrlForFolder(Folder::get($sReturnData));
                break;
            case 'simpleSearch': // do we use this?
                $sTargetUrl = KTBrowseUtil::getSimpleSearchBaseUrl();
                $extraargs = array('fSearchableText'=>$sReturnData);
                break;
            case 'booleanSearch': // do we use this?
                $sTargetUrl = KTBrowseUtil::getBooleanSearchBaseUrl();
                $sAction = 'performSearch';
                $extraargs = array('boolean_search_id'=>$sReturnData);
                break;
            case 'search2':
                $sTargetUrl = KTBrowseUtil::getSearchResultURL();
                $sAction = 'refresh';
                break;
            default:
                $sTargetUrl = $sReturnAction;
                $sAction = '';
        }

        $oForm = new KTForm;
        $oForm->setOptions(array(
            'identifier' => 'ktcore.actions.bulk.complete.form',
            'submit_label' => _kt('Return'),
            'targeturl' => $sTargetUrl,
            'context' => $this,
            'action' => $sAction,
            'extraargs' => $extraargs,
            'noframe' => true,
        ));
        return $oForm;
    }


    // main entry point - checks the entity list and displays lists
    function do_main() {
        // get entities (using the checkboxes atm)
        $aFolders = KTUtil::arrayGet($_REQUEST, 'selection_f' , array());
        $aDocuments = KTUtil::arrayGet($_REQUEST, 'selection_d' , array());
        $this->oEntityList = new KTEntityList($aDocuments, $aFolders);

        // gives us $this->aFailed
        $iActiveCount = $this->check_entities();

    	$oTemplating =& KTTemplating::getSingleton();
    	$oTemplate = $oTemplating->loadTemplate('ktcore/bulk_action_listing');

        $this->store_lists();

        return $oTemplate->render(array('context' => $this,
                                        'form' => $this->form_listing(),
                                        'failed' => $this->aFailed,
                                        'active' => $this->oActiveEntityList,
                                        'activecount' => $iActiveCount,
                                        'failedform' => $this->form_complete(),
                                        'folders' => $this->_getNames($this->oActiveEntityList->getFolderIds(), 'Folder'),
                                        'documents' => $this->_getNames($this->oActiveEntityList->getDocumentIds(), 'Document')));

    }

    // override to add a screen to get a reason, or whatever
    // remember to pass to perform action next, and call the super's method
    function do_collectinfo() {
        $this->store_lists();
        return $this->do_performaction();
    }

    // perform the action itself, and list results (completion action)
    function do_performaction() {
        $this->get_lists();
        $this->aPersistParams = array();
        $targetFolderId = $_REQUEST['fFolderId'];
        $targetFolder =& Folder::get($targetFolderId);
        $this->perform_action_on_list();
        // Parse affected documents and folders
        if(count($this->uploadedDocs) > 0)
            $this->do_notification($this->uploadedDocs, $this->eventAction, $targetFolder);
        elseif(count($this->uploadedFolders) > 0)
            $this->do_notification($this->uploadedFolders, $this->eventAction, $targetFolder);
        // Action specific Emails
        // Check if its a move action
        if($this->eventAction == "MovedDocument") {
            // Notify the folder from which the action happened
            $originalFolderId = $_REQUEST['fOriginalFolderId'];
            $originalFolder =& Folder::get($originalFolderId);
            if(count($this->uploadedDocs) > 0)
                $this->do_notification($this->uploadedDocs, $this->eventAction, $originalFolder);
            elseif(count($this->uploadedFolders) > 0)
                $this->do_notification($this->uploadedFolders, $this->eventAction, $originalFolder);
        }

        $oTemplating =& KTTemplating::getSingleton();
        $oTemplate = $oTemplating->loadTemplate('ktcore/bulk_action_complete');

        return $oTemplate->render(array('context' => $this,
                                        'list' => $this->aActionResults,
                                        'form' => $this->form_complete()));
    }

    // Jarrett Jordaan: Deal with bulk actions
    function do_notification($objects, $eventAction, $targetFolder) {
        // Make sure there were documents/folders affected
        if ($targetFolder && count($objects) > 0 && $eventAction != '') {
            $oSubscriptionEvent = new SubscriptionEvent();
            $oSubscriptionEvent->notifyBulkDocumentAction($objects, $eventAction, $targetFolder);
        }
    }


    // main overrides

    // override to do the actual action, on an individual entity
    function perform_action($oEntity) {
        return PEAR::raiseError(_kt('Action component not implemented'));
    }

    // check an individual entity - this should be overrided with additional
    // checks required for the specific action, but should always call its
    // parent implementation
    function check_entity($oEntity) {
        $oPermission =& KTPermission::getByName($this->_sPermission);
        if(PEAR::isError($oPermission)) {
            return true;
        }

        // basic document checks

        // TODO: check if this is appropriate
        //       should probably store the 'equivalent' action (ie. document.delete)
        //       and check that, rather than add a new list of actions to the workflow
        //       section
        if(is_a($oEntity, 'Document')) {
            if(!KTWorkflowUtil::actionEnabledForDocument($oEntity, $this->sName)) {
                return PEAR::raiseError(_kt('Action is disabled by workflow'));
            }
            $status = $oEntity->getStatusID();
            if($status==DELETED||$status==ARCHIVED) {
                return PEAR::raiseError(_kt('Document is archived or deleted'));
            }
        }

        // admin check
        if($this->bAllowInAdminMode) {
            if(KTBrowseUtil::inAdminMode($this->oUser, null)) {
                return true;
            }
        }

        if(!KTPermissionUtil::userHasPermissionOnItem($this->oUser, $oPermission, $oEntity)) {
            return PEAR::raiseError(_kt('You do not have the required permissions'));
        }

        return true;
    }


}

class KTBulkDocumentAction extends KTBulkAction {
    function check_entity($oEntity) {
        if(!is_a($oEntity, 'Document')) {
            return false;
        }
        return parent::check_entity($oEntity);
    }
}

class KTBulkFolderAction extends KTBulkAction {
    function check_entity($oEntity) {
        if(!is_a($oEntity, 'Folder')) {
            return false;
        }
        return parent::check_entity($oEntity);
    }
}


// util class for bulk actions

class KTBulkActionUtil {
    function getBulkActionInfo($slot = 'bulkaction') {
        $oRegistry =& KTActionRegistry::getSingleton();
        return $oRegistry->getActions($slot);
    }

    function getAllBulkActions($slot = 'bulkaction') {
        $aObjects = array();

        foreach (KTBulkActionUtil::getBulkActionInfo($slot) as $aAction) {
            list($sClassName, $sPath, $sName, $sPlugin) = $aAction;
            $oRegistry =& KTPluginRegistry::getSingleton();
            $oPlugin =& $oRegistry->getPlugin($sPlugin);
            if (!empty($sPath)) {
                require_once($sPath);
            }
            $aObjects[] = new $sClassName(null, null, $oPlugin);
        }
        return $aObjects;
    }

    function getBulkActionsByNames($aNames, $slot = 'bulkaction', $oUser = null) {
        $aObjects = array();
        foreach (KTBulkActionUtil::getBulkActionInfo($slot) as $aAction) {
            list($sClassName, $sPath, $sName, $sPlugin) = $aAction;
            $oRegistry =& KTPluginRegistry::getSingleton();
            $oPlugin =& $oRegistry->getPlugin($sPlugin);
            if (!in_array($sName, $aNames)) {
                continue;
            }
            if (!empty($sPath)) {
                require_once($sPath);
            }
            $aObjects[] = new $sClassName(null, $oUser, $oPlugin);
        }
        return $aObjects;
    }
}

?>