<?php

/**
* Business logic concerned with the deletion of a document.  
* Will use documentDeleteUI for presentation information
*
* @author Rob Cherry, Jam Warehouse South Africa (Pty) Ltd
* @date 19 February 2003 
* @package presentation.lookAndFeel.knowledgeTree.documentmanagement
*/

require_once("../../../../config/dmsDefaults.php");
require_once("$default->fileSystemRoot/lib/foldermanagement/Folder.inc");
require_once("$default->fileSystemRoot/lib/users/User.inc");
require_once("$default->fileSystemRoot/lib/documentmanagement/Document.inc");
require_once("$default->fileSystemRoot/lib/documentmanagement/DocumentTransaction.inc");
require_once("$default->fileSystemRoot/lib/subscriptions/SubscriptionEngine.inc");

require_once("$default->fileSystemRoot/presentation/Html.inc");

require_once("$default->fileSystemRoot/presentation/lookAndFeel/knowledgeTree/foldermanagement/folderUI.inc");

require_once("deleteDocumentUI.inc");

if (checkSession()) {
	if (isset($fDocumentID)) {
		if (Permission::userHasDocumentWritePermission($fDocumentID)) {
			if (isset($fDeleteConfirmed)) {
				//deletion of document is confirmed
				$oDocument = Document::get($fDocumentID);
				if (isset($oDocument)) {
					$sDocumentPath = Folder::getFolderPath($oDocument->getFolderID()) . $oDocument->getFileName();					
					$oDocumentTransaction = & new DocumentTransaction($fDocumentID, "Document deleted", DELETE);
					$oDocumentTransaction->create();
					if ($oDocument->delete()) {
						if (unlink($sDocumentPath)) {
							// successfully deleted the document from the file system
                            
                            // fire subscription alerts for the deleted document
                            $count = SubscriptionEngine::fireSubscription($oDocument->getFolderID(), SubscriptionConstants::subscriptionAlertType("RemoveDocument"),
                                     SubscriptionConstants::subscriptionType("FolderSubscription"),
                                     array( "removedDocumentName" => $oDocument->getName(),
                                            "folderName" => Folder::getFolderName($oDocument->getFolderID())));
                            $default->log->info("deleteDocumentBL.php fired $count subscription alerts for removed document " . $oDocument->getName());
                            

							// redirect to the browse folder page							
							redirect("$default->rootUrl/control.php?action=browse&fFolderID=" . $oDocument->getFolderID());
						} else {
							//could not delete the document from the file system
							//reverse the document deletion
							$oDocument->create();
							//get rid of the document transaction
							$oDocumentTransaction->delete();
							require_once("$default->fileSystemRoot/presentation/webpageTemplate.inc");			
							$oPatternCustom = & new PatternCustom();							
							$oPatternCustom->setHtml("");
							$main->setCentralPayload($oPatternCustom);
							$main->setErrorMessage("The document could not be deleted from the file system");
							$main->render();
						}
					} else {
						//could not delete the document in the db
						$oDocumentTransaction->delete();
						require_once("$default->fileSystemRoot/presentation/webpageTemplate.inc");			
						$oPatternCustom = & new PatternCustom();							
						$oPatternCustom->setHtml("");
						$main->setCentralPayload($oPatternCustom);
						$main->setErrorMessage("The document could not be deleted from the database");
						$main->render();
					}
				} else {
					//could not load document object
					require_once("$default->fileSystemRoot/presentation/webpageTemplate.inc");			
					$oPatternCustom = & new PatternCustom();							
					$oPatternCustom->setHtml("");
					$main->setCentralPayload($oPatternCustom);
					$main->setErrorMessage("An error occured whilst retrieving the document from the database");
					$main->render();
				}
			} else {
				//get confirmation first				
				require_once("$default->fileSystemRoot/presentation/webpageTemplate.inc");			
				$oPatternCustom = & new PatternCustom();
				$oDocument = Document::get($fDocumentID);
				$oPatternCustom->setHtml(getPage($fDocumentID, $oDocument->getFolderID(), $oDocument->getName()));				
				$main->setCentralPayload($oPatternCustom);				
				$main->render();
			}
		} else {
			//user does not have permission to delete the document
			require_once("$default->fileSystemRoot/presentation/webpageTemplate.inc");			
			$oPatternCustom = & new PatternCustom();							
			$oPatternCustom->setHtml("");
			$main->setCentralPayload($oPatternCustom);
			$main->setErrorMessage("You do not have permission to delete this document");
			$main->render();
		}
	} else {
		//no document selected for deletion
		require_once("$default->fileSystemRoot/presentation/webpageTemplate.inc");			
		$oPatternCustom = & new PatternCustom();							
		$oPatternCustom->setHtml("");
		$main->setCentralPayload($oPatternCustom);
		$main->setErrorMessage("No document currently selected");
		$main->render();
	}
}