<?php

/**

 * Zend Framework

 *

 * LICENSE

 *

 * This source file is subject to the new BSD license that is bundled

 * with this package in the file LICENSE.txt.

 * It is also available through the world-wide-web at this URL:

 * http://framework.zend.com/license/new-bsd

 * If you did not receive a copy of the license and are unable to

 * obtain it through the world-wide-web, please send an email

 * to license@zend.com so we can send you a copy immediately.

 *

 * @category   Zend

 * @package    Zend_Search_Lucene

 * @subpackage Document

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 * @version    $Id: Pptx.php 20096 2010-01-06 02:05:09Z bkarwin $

 */

/** Zend_Search_Lucene_Document_OpenXml */

require_once 'Zend/Search/Lucene/Document/OpenXml.php';

/**

 * Pptx document.

 *

 * @category   Zend

 * @package    Zend_Search_Lucene

 * @subpackage Document

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

class Zend_Search_Lucene_Document_Pptx extends Zend_Search_Lucene_Document_OpenXml

{

    /**

     * Xml Schema - PresentationML

     *

     * @var string

     */

    const SCHEMA_PRESENTATIONML = 'http://schemas.openxmlformats.org/presentationml/2006/main';

    /**

     * Xml Schema - DrawingML

     *

     * @var string

     */

    const SCHEMA_DRAWINGML = 'http://schemas.openxmlformats.org/drawingml/2006/main';

    /**

     * Xml Schema - Slide relation

     *

     * @var string

     */

    const SCHEMA_SLIDERELATION = 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/slide';

    /**

     * Xml Schema - Slide notes relation

     *

     * @var string

     */

    const SCHEMA_SLIDENOTESRELATION = 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/notesSlide';

    /**

     * Object constructor

     *

     * @param string  $fileName

     * @param boolean $storeContent

     * @throws Zend_Search_Lucene_Exception

     */

    private function __construct($fileName, $storeContent)

    {

        if (!class_exists('ZipArchive', false)) {

            require_once 'Zend/Search/Lucene/Exception.php';

            throw new Zend_Search_Lucene_Exception('MS Office documents processing functionality requires Zip extension to be loaded');

        }

        // Document data holders

        $slides = array();

        $slideNotes = array();

        $documentBody = array();

        $coreProperties = array();

        // Open OpenXML package

        $package = new ZipArchive();

        $package->open($fileName);

        // Read relations and search for officeDocument

        $relationsXml = $package->getFromName('_rels/.rels');

        if ($relationsXml === false) {

            require_once 'Zend/Search/Lucene/Exception.php';

            throw new Zend_Search_Lucene_Exception('Invalid archive or corrupted .pptx file.');

        }

        $relations = simplexml_load_string($relationsXml);

        foreach ($relations->Relationship as $rel) {

            if ($rel["Type"] == Zend_Search_Lucene_Document_OpenXml::SCHEMA_OFFICEDOCUMENT) {

                // Found office document! Search for slides...

                $slideRelations = simplexml_load_string($package->getFromName( $this->absoluteZipPath(dirname($rel["Target"]) . "/_rels/" . basename($rel["Target"]) . ".rels")) );

                foreach ($slideRelations->Relationship as $slideRel) {

                    if ($slideRel["Type"] == Zend_Search_Lucene_Document_Pptx::SCHEMA_SLIDERELATION) {

                        // Found slide!

                        $slides[ str_replace( 'rId', '', (string)$slideRel["Id"] ) ] = simplexml_load_string(

                            $package->getFromName( $this->absoluteZipPath(dirname($rel["Target"]) . "/" . dirname($slideRel["Target"]) . "/" . basename($slideRel["Target"])) )

                        );

                        // Search for slide notes

                        $slideNotesRelations = simplexml_load_string($package->getFromName( $this->absoluteZipPath(dirname($rel["Target"]) . "/" . dirname($slideRel["Target"]) . "/_rels/" . basename($slideRel["Target"]) . ".rels")) );

                        foreach ($slideNotesRelations->Relationship as $slideNoteRel) {

                            if ($slideNoteRel["Type"] == Zend_Search_Lucene_Document_Pptx::SCHEMA_SLIDENOTESRELATION) {

                                // Found slide notes!

                                $slideNotes[ str_replace( 'rId', '', (string)$slideRel["Id"] ) ] = simplexml_load_string(

                                    $package->getFromName( $this->absoluteZipPath(dirname($rel["Target"]) . "/" . dirname($slideRel["Target"]) . "/" . dirname($slideNoteRel["Target"]) . "/" . basename($slideNoteRel["Target"])) )

                                );

                                break;

                            }

                        }

                    }

                }

                break;

            }

        }

        // Sort slides

        ksort($slides);

        ksort($slideNotes);

        // Extract contents from slides

        foreach ($slides as $slideKey => $slide) {

            // Register namespaces

            $slide->registerXPathNamespace("p", Zend_Search_Lucene_Document_Pptx::SCHEMA_PRESENTATIONML);

            $slide->registerXPathNamespace("a", Zend_Search_Lucene_Document_Pptx::SCHEMA_DRAWINGML);

            // Fetch all text

            $textElements = $slide->xpath('//a:t');

            foreach ($textElements as $textElement) {

                $documentBody[] = (string)$textElement;

            }

            // Extract contents from slide notes

            if (isset($slideNotes[$slideKey])) {

                // Fetch slide note

                $slideNote = $slideNotes[$slideKey];

                // Register namespaces

                $slideNote->registerXPathNamespace("p", Zend_Search_Lucene_Document_Pptx::SCHEMA_PRESENTATIONML);

                $slideNote->registerXPathNamespace("a", Zend_Search_Lucene_Document_Pptx::SCHEMA_DRAWINGML);

                // Fetch all text

                $textElements = $slideNote->xpath('//a:t');

                foreach ($textElements as $textElement) {

                    $documentBody[] = (string)$textElement;

                }

            }

        }

        // Read core properties

        $coreProperties = $this->extractMetaData($package);

        // Close file

        $package->close();

        // Store filename

        $this->addField(Zend_Search_Lucene_Field::Text('filename', $fileName, 'UTF-8'));

            // Store contents

        if ($storeContent) {

            $this->addField(Zend_Search_Lucene_Field::Text('body', implode(' ', $documentBody), 'UTF-8'));

        } else {

            $this->addField(Zend_Search_Lucene_Field::UnStored('body', implode(' ', $documentBody), 'UTF-8'));

        }

        // Store meta data properties

        foreach ($coreProperties as $key => $value)

        {

            $this->addField(Zend_Search_Lucene_Field::Text($key, $value, 'UTF-8'));

        }

        // Store title (if not present in meta data)

        if (!isset($coreProperties['title']))

        {

            $this->addField(Zend_Search_Lucene_Field::Text('title', $fileName, 'UTF-8'));

        }

    }

    /**

     * Load Pptx document from a file

     *

     * @param string  $fileName

     * @param boolean $storeContent

     * @return Zend_Search_Lucene_Document_Pptx

     */

    public static function loadPptxFile($fileName, $storeContent = false)

    {

        return new Zend_Search_Lucene_Document_Pptx($fileName, $storeContent);

    }

}