<?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';

        // 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';

        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;
	   
        $pdfDir = $default->pdfDirectory;
        $pdfFile = $pdfDir .'/'. $this->document->iId.'.pdf';
        $thumbnaildir = $pdfDir."/thumbnails";
        $thumbnailfile = $thumbnaildir.'/'.$this->document->iId.'.jpg';
        
        //if thumbail dir does not exist, generate one
        if (!file_exists($thumbnaildir)) {
        	 mkdir($thumbnaildir, 0755);
        }

        // if there is no pdf that exists - hop out
        if(!file_exists($pdfFile)){
            global $default;
            $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')) {
        	$result= shell_exec("convert -size 200x200 {$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($documentId)
    {
    	global $default;
        
        $oKTTemplating =& KTTemplating::getSingleton();
        $oTemplate =& $oKTTemplating->loadTemplate('thumbnail_viewlet');
        
        if (is_null($oTemplate)) return '';
		
        $pdfDir = $default->pdfDirectory;
		$thumbnailfile = $pdfDir . '/thumbnails/'.$documentId.'.jpg';
		
        // check that file exists, attempt to create if not
		if (!file_exists($thumbnailfile))
        {
            // try to create, return on failure
            $thumbnailer = new thumbnailGenerator();
            $thumbnailer->setDocument($this->oDocument);
            $thumbnailer->processDocument();
            if (!file_exists($thumbnailfile)) {
                return '';
            }
        }
        
        // NOTE this is to turn the config setting for the PDF directory into a proper URL and not a path
		$thumbnailUrl = str_replace($default->varDirectory, 'var/', $thumbnailfile);
        $oTemplate->setData(array('thumbnail' => $thumbnailUrl));
        
        return $oTemplate->render();
    }
    
    public function get_width($documentId)
    {
    	global $default;
    	
        $pdfDir = $default->pdfDirectory;
		$thumbnailfile = $pdfDir . '/thumbnails/'.$documentId.'.jpg';
		$size = getimagesize($thumbnailfile);
		
        return $size[0];
    }
    
}

?>