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1<?php
2/**
3 * This file is part of PHPPresentation - A pure PHP library for reading and writing
4 * presentations documents.
5 *
6 * PHPPresentation is free software distributed under the terms of the GNU Lesser
7 * General Public License version 3 as published by the Free Software Foundation.
8 *
9 * For the full copyright and license information, please read the LICENSE
10 * file that was distributed with this source code. For the full list of
11 * contributors, visit https://github.com/PHPOffice/PHPPresentation/contributors.
12 *
13 * @see        https://github.com/PHPOffice/PHPPresentation
14 *
15 * @license     http://www.gnu.org/licenses/lgpl.txt LGPL version 3
16 */
17
18declare(strict_types=1);
19
20namespace PhpOffice\PhpPresentation\Writer\PowerPoint2007;
21
22use PhpOffice\Common\Adapter\Zip\ZipInterface;
23use PhpOffice\Common\XMLWriter;
24use PhpOffice\PhpPresentation\Shape\Comment;
25use PhpOffice\PhpPresentation\Shape\Comment\Author;
26
27class Relationships extends AbstractDecoratorWriter
28{
29    /**
30     * Add relationships to ZIP file.
31     */
32    public function render(): ZipInterface
33    {
34        $this->getZip()->addFromString('_rels/.rels', $this->writeRelationships());
35        $this->getZip()->addFromString('ppt/_rels/presentation.xml.rels', $this->writePresentationRelationships());
36
37        return $this->getZip();
38    }
39
40    /**
41     * Write relationships to XML format.
42     *
43     * @return string XML Output
44     */
45    protected function writeRelationships(): string
46    {
47        // Create XML writer
48        $objWriter = new XMLWriter(XMLWriter::STORAGE_MEMORY);
49
50        // XML header
51        $objWriter->startDocument('1.0', 'UTF-8', 'yes');
52
53        // Relationships
54        $objWriter->startElement('Relationships');
55        $objWriter->writeAttribute('xmlns', 'http://schemas.openxmlformats.org/package/2006/relationships');
56        // Relationship ppt/presentation.xml
57        $this->writeRelationship($objWriter, 1, 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument', 'ppt/presentation.xml');
58        // Relationship docProps/core.xml
59        $this->writeRelationship($objWriter, 2, 'http://schemas.openxmlformats.org/package/2006/relationships/metadata/core-properties', 'docProps/core.xml');
60        // Relationship docProps/app.xml
61        $this->writeRelationship($objWriter, 3, 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/extended-properties', 'docProps/app.xml');
62        // Relationship docProps/custom.xml
63        $this->writeRelationship($objWriter, 4, 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/custom-properties', 'docProps/custom.xml');
64
65        $idxRelation = 5;
66
67        // Relationship docProps/thumbnail.jpeg
68        $thumnbail = $this->getPresentation()->getPresentationProperties()->getThumbnail();
69        if ($thumnbail) {
70            $gdImage = imagecreatefromstring($thumnbail);
71            if ($gdImage) {
72                imagedestroy($gdImage);
73                // Relationship docProps/thumbnail.jpeg
74                $this->writeRelationship($objWriter, $idxRelation, 'http://schemas.openxmlformats.org/package/2006/relationships/metadata/thumbnail', 'docProps/thumbnail.jpeg');
75                // $idxRelation++;
76            }
77        }
78
79        $objWriter->endElement();
80
81        // Return
82        return $objWriter->getData();
83    }
84
85    /**
86     * Write presentation relationships to XML format.
87     *
88     * @return string XML Output
89     */
90    protected function writePresentationRelationships(): string
91    {
92        // Create XML writer
93        $objWriter = new XMLWriter(XMLWriter::STORAGE_MEMORY);
94
95        // XML header
96        $objWriter->startDocument('1.0', 'UTF-8', 'yes');
97
98        // Relationships
99        $objWriter->startElement('Relationships');
100        $objWriter->writeAttribute('xmlns', 'http://schemas.openxmlformats.org/package/2006/relationships');
101
102        // Relation id
103        $relationId = 1;
104
105        foreach ($this->getPresentation()->getAllMasterSlides() as $oMasterSlide) {
106            // Relationship slideMasters/slideMasterX.xml
107            $this->writeRelationship($objWriter, $relationId++, 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/slideMaster', 'slideMasters/slideMaster' . $oMasterSlide->getRelsIndex() . '.xml');
108        }
109
110        // Add slide theme (only one!)
111        // Relationship theme/theme1.xml
112        $this->writeRelationship($objWriter, $relationId++, 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/theme', 'theme/theme1.xml');
113
114        // Relationships with slides
115        $slideCount = $this->getPresentation()->getSlideCount();
116        for ($i = 0; $i < $slideCount; ++$i) {
117            $this->writeRelationship($objWriter, $relationId++, 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/slide', 'slides/slide' . ($i + 1) . '.xml');
118        }
119
120        $this->writeRelationship($objWriter, $relationId++, 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/presProps', 'presProps.xml');
121        $this->writeRelationship($objWriter, $relationId++, 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/viewProps', 'viewProps.xml');
122        $this->writeRelationship($objWriter, $relationId++, 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/tableStyles', 'tableStyles.xml');
123
124        // Comments Authors
125        foreach ($this->getPresentation()->getAllSlides() as $oSlide) {
126            foreach ($oSlide->getShapeCollection() as $oShape) {
127                if (!($oShape instanceof Comment)) {
128                    continue;
129                }
130                $oAuthor = $oShape->getAuthor();
131                if (!($oAuthor instanceof Author)) {
132                    continue;
133                }
134                $this->writeRelationship($objWriter, $relationId++, 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/commentAuthors', 'commentAuthors.xml');
135
136                break 2;
137            }
138        }
139        $objWriter->endElement();
140
141        // Return
142        return $objWriter->getData();
143    }
144}