thumbnails.php
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<?php
/*
* $Id: $
*
* The contents of this file are subject to the KnowledgeTree
* Commercial Editions On-Premise License ("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/about/legal/
* The terms of this license may change from time to time and the latest
* license will be published from time to time at the above Internet address.
*
* This edition of the KnowledgeTree software
* is NOT licensed to you under Open Source terms.
* You may not redistribute this source code.
* For more information please see the License above.
*
* (c) 2008 KnowledgeTree Inc.
* Portions copyright The Jam Warehouse Software (Pty) Ltd;
* All Rights Reserved.
*
*/
require_once(KT_LIB_DIR . "/actions/documentviewlet.inc.php");
require_once(KT_DIR . '/search2/documentProcessor/documentProcessor.inc.php');
/**
* Generates thumbnails of documents using the pdf converter output
* Dependent on the pdfConverter
*/
class thumbnailGenerator extends BaseProcessor
{
public $order = 3;
protected $namespace = 'thumbnails.generator.processor';
/**
* Constructor
*
* @return thumbnailGenerator
*/
public function thumbnailGenerator()
{
}
/**
* Gets the document path and calls the generator function
*
* @return boolean
*/
public function processDocument()
{
// do the generation
$res = $this->generateThumbnail();
return $res;
}
/**
* The supported mime types for the converter.
*
* @return array
*/
public function getSupportedMimeTypes()
{
// $aAcceptedMimeTypes = array('doc', 'ods', 'odt', 'ott', 'txt', 'rtf', 'sxw', 'stw',
// // 'html', 'htm',
// 'xml' , 'pdb', 'psw', 'ods', 'ots', 'sxc',
// 'stc', 'dif', 'dbf', 'xls', 'xlt', 'slk', 'csv', 'pxl',
// 'odp', 'otp', 'sxi', 'sti', 'ppt', 'pot', 'sxd', 'odg',
// 'otg', 'std', 'asc');
// taken from the original list of accepted types in the pdf generator action
$mime_types = array();
$mime_types[] = 'text/plain';
$mime_types[] = 'text/html';
$mime_types[] = 'text/csv';
$mime_types[] = 'text/rtf';
// Office OLE2 - 2003, XP, etc
$mime_types[] = 'application/msword';
$mime_types[] = 'application/vnd.ms-powerpoint';
$mime_types[] = 'application/vnd.ms-excel';
// Star Office
$mime_types[] = 'application/vnd.sun.xml.writer';
$mime_types[] = 'application/vnd.sun.xml.writer.template';
$mime_types[] = 'application/vnd.sun.xml.calc';
$mime_types[] = 'application/vnd.sun.xml.calc.template';
$mime_types[] = 'application/vnd.sun.xml.draw';
$mime_types[] = 'application/vnd.sun.xml.draw.template';
$mime_types[] = 'application/vnd.sun.xml.impress';
$mime_types[] = 'application/vnd.sun.xml.impress.template';
// Open Office
$mime_types[] = 'application/vnd.oasis.opendocument.text';
$mime_types[] = 'application/vnd.oasis.opendocument.text-template';
$mime_types[] = 'application/vnd.oasis.opendocument.graphics';
$mime_types[] = 'application/vnd.oasis.opendocument.graphics-template';
$mime_types[] = 'application/vnd.oasis.opendocument.presentation';
$mime_types[] = 'application/vnd.oasis.opendocument.presentation-template';
$mime_types[] = 'application/vnd.oasis.opendocument.spreadsheet';
$mime_types[] = 'application/vnd.oasis.opendocument.spreadsheet-template';
// OO3
// Office 2007
$mime_types[] = 'application/vnd.openxmlformats-officedocument.wordprocessingml.document';
$mime_types[] = 'application/vnd.openxmlformats-officedocument.wordprocessingml.template';
$mime_types[] = 'application/vnd.openxmlformats-officedocument.presentationml.template';
$mime_types[] = 'application/vnd.openxmlformats-officedocument.presentationml.slideshow';
$mime_types[] = 'application/vnd.openxmlformats-officedocument.presentationml.presentation';
$mime_types[] = 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet';
$mime_types[] = 'application/vnd.openxmlformats-officedocument.spreadsheetml.template';
// In addition PDF files are also supported
$mime_types[] = 'application/pdf';
return $mime_types;
}
/**
* Generates the thumbnail from the pdf
*
* @return boolean
*/
private function generateThumbnail()
{
/*
The thumbnail is displayed in the info panel and the document view
The info panel is in the plugin ktcore/documentpreview/
- add a hook in there but build the functionality in this plugin ie keep the plugins separate and don't create dependencies
- if the thumbnail plugin is disabled then maybe display a normal sized info panel
The document view will display the thumbnail on the right in a document viewlet similar to the workflow viewlet
- check out ktcore/KTDocumentViewlets.php
- viewlet class is below
*/
global $default;
$mimeTypeId = $this->document->getMimeTypeID();
$mimeType = KTMime::getMimeTypeName($mimeTypeId);
// Get the pdf source file - if the document is a pdf then use the document as the source
if($mimeType == 'application/pdf'){
$pdfDir = $default->documentRoot;
$pdfFile = $pdfDir . DIRECTORY_SEPARATOR . $this->document->getStoragePath();
}else{
$pdfDir = $default->pdfDirectory;
$pdfFile = $pdfDir .'/'. $this->document->iId.'.pdf';
}
$thumbnaildir = $default->internalVarDirectory.'/thumbnails';
$thumbnailfile = $thumbnaildir.'/'.$this->document->iId.'.jpg';
//if thumbail dir does not exist, generate one and add an index file to block access
if (!file_exists($thumbnaildir)) {
mkdir($thumbnaildir, 0755);
touch($thumbnaildir.'/index.html');
file_put_contents($thumbnaildir.'/index.html', 'You do not have permission to access this directory.');
}
// if there is no pdf that exists - hop out
if(!file_exists($pdfFile)){
$default->log->debug('Thumbnail Generator Plugin: PDF file does not exist, cannot generate a thumbnail');
return false;
}
// if a previous version of the thumbnail exists - delete it
if (file_exists($thumbnailfile)) {
@unlink($thumbnailfile);
}
// do generation
if (extension_loaded('imagick')) {
$pathConvert = (!empty($default->convertPath)) ? $default->convertPath : 'convert';
$result = shell_exec("{$pathConvert} -size 200x200 {$pdfFile}[0] -resize 200x200 $thumbnailfile");
return true;
}else{
$default->log->debug('Thumbnail Generator Plugin: Imagemagick not installed, cannot generate a thumbnail');
return false;
}
}
}
class ThumbnailViewlet extends KTDocumentViewlet {
var $sName = 'thumbnail.viewlets';
public function display_viewlet() {
// Get the document id
$documentId = $this->oDocument->getId();
if(!is_numeric($documentId)){
return '';
}
return $this->renderThumbnail($documentId);
}
public function renderThumbnail($documentId) {
// Set up the template
$oKTTemplating =& KTTemplating::getSingleton();
$oTemplate =& $oKTTemplating->loadTemplate('thumbnail_viewlet');
if (is_null($oTemplate)){
return '';
}
// Check for the thumbnail
global $default;
$varDir = $default->internalVarDirectory;
$thumbnailfile = $varDir . '/thumbnails/'.$documentId.'.jpg';
// if the thumbnail doesn't exist try to create it
if (!file_exists($thumbnailfile)){
$thumbnailer = new thumbnailGenerator();
$thumbnailer->setDocument($this->oDocument);
$thumbnailer->processDocument();
// if it still doesn't exist, return an empty string
if (!file_exists($thumbnailfile)) {
return '';
}
}
// check for existence and status of instant view plugin
$url = '';
if (KTPluginUtil::pluginIsActive('instaview.processor.plugin'))
{
require_once KTPluginUtil::getPluginPath('instaview.processor.plugin') . 'instaViewLinkAction.php';
$ivLinkAction = new instaViewLinkAction();
$url = $ivLinkAction->getViewLink($documentId, 'document');
}
// Get the url to the thumbnail and render it
$thumbnailUrl = str_replace($default->internalVarDirectory, 'var', $thumbnailfile);
$oTemplate->setData(array(
'thumbnail' => $thumbnailUrl,
'url' => $url
));
return $oTemplate->render();
}
public function get_width($documentId){
global $default;
$varDir = $default->internalVarDirectory;
$thumbnailfile = $varDir . '/thumbnails/'.$documentId.'.jpg';
$size = getimagesize($thumbnailfile);
return $size[0];
}
}
?>