<?php

/**

 * PHPExcel

 *

 * Copyright (c) 2006 - 2014 PHPExcel

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

 *

 * @category   PHPExcel

 * @package    PHPExcel_Writer_Excel2007

 * @copyright  Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)

 * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt	LGPL

 * @version    1.8.0, 2014-03-02

 */





/**

 * PHPExcel_Writer_Excel2007_Rels

 *

 * @category   PHPExcel

 * @package    PHPExcel_Writer_Excel2007

 * @copyright  Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)

 */

class PHPExcel_Writer_Excel2007_Rels extends PHPExcel_Writer_Excel2007_WriterPart

{

	/**

	 * Write relationships to XML format

	 *

	 * @param 	PHPExcel	$pPHPExcel

	 * @return 	string 		XML Output

	 * @throws 	PHPExcel_Writer_Exception

	 */

	public function writeRelationships(PHPExcel $pPHPExcel = null)

	{

		// Create XML writer

		$objWriter = null;

		if ($this->getParentWriter()->getUseDiskCaching()) {

			$objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_DISK, $this->getParentWriter()->getDiskCachingDirectory());

		} else {

			$objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_MEMORY);

		}



		// XML header

		$objWriter->startDocument('1.0','UTF-8','yes');



		// Relationships

		$objWriter->startElement('Relationships');

		$objWriter->writeAttribute('xmlns', 'http://schemas.openxmlformats.org/package/2006/relationships');



			$customPropertyList = $pPHPExcel->getProperties()->getCustomProperties();

			if (!empty($customPropertyList)) {

				// Relationship docProps/app.xml

				$this->_writeRelationship(

					$objWriter,

					4,

					'http://schemas.openxmlformats.org/officeDocument/2006/relationships/custom-properties',

					'docProps/custom.xml'

				);



			}



			// Relationship docProps/app.xml

			$this->_writeRelationship(

				$objWriter,

				3,

				'http://schemas.openxmlformats.org/officeDocument/2006/relationships/extended-properties',

				'docProps/app.xml'

			);



			// Relationship docProps/core.xml

			$this->_writeRelationship(

				$objWriter,

				2,

				'http://schemas.openxmlformats.org/package/2006/relationships/metadata/core-properties',

				'docProps/core.xml'

			);



			// Relationship xl/workbook.xml

			$this->_writeRelationship(

				$objWriter,

				1,

				'http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument',

				'xl/workbook.xml'

			);

			// a custom UI in workbook ?

			if($pPHPExcel->hasRibbon()){

				$this->_writeRelationShip(

					$objWriter,

					5,

					'http://schemas.microsoft.com/office/2006/relationships/ui/extensibility',

					$pPHPExcel->getRibbonXMLData('target')

				);

			}



		$objWriter->endElement();



		// Return

		return $objWriter->getData();

	}



	/**

	 * Write workbook relationships to XML format

	 *

	 * @param 	PHPExcel	$pPHPExcel

	 * @return 	string 		XML Output

	 * @throws 	PHPExcel_Writer_Exception

	 */

	public function writeWorkbookRelationships(PHPExcel $pPHPExcel = null)

	{

		// Create XML writer

		$objWriter = null;

		if ($this->getParentWriter()->getUseDiskCaching()) {

			$objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_DISK, $this->getParentWriter()->getDiskCachingDirectory());

		} else {

			$objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_MEMORY);

		}



		// XML header

		$objWriter->startDocument('1.0','UTF-8','yes');



		// Relationships

		$objWriter->startElement('Relationships');

		$objWriter->writeAttribute('xmlns', 'http://schemas.openxmlformats.org/package/2006/relationships');



			// Relationship styles.xml

			$this->_writeRelationship(

				$objWriter,

				1,

				'http://schemas.openxmlformats.org/officeDocument/2006/relationships/styles',

				'styles.xml'

			);



			// Relationship theme/theme1.xml

			$this->_writeRelationship(

				$objWriter,

				2,

				'http://schemas.openxmlformats.org/officeDocument/2006/relationships/theme',

				'theme/theme1.xml'

			);



			// Relationship sharedStrings.xml

			$this->_writeRelationship(

				$objWriter,

				3,

				'http://schemas.openxmlformats.org/officeDocument/2006/relationships/sharedStrings',

				'sharedStrings.xml'

			);



			// Relationships with sheets

			$sheetCount = $pPHPExcel->getSheetCount();

			for ($i = 0; $i < $sheetCount; ++$i) {

				$this->_writeRelationship(

					$objWriter,

					($i + 1 + 3),

					'http://schemas.openxmlformats.org/officeDocument/2006/relationships/worksheet',

					'worksheets/sheet' . ($i + 1) . '.xml'

				);

			}

			// Relationships for vbaProject if needed

			// id : just after the last sheet

			if($pPHPExcel->hasMacros()){

				$this->_writeRelationShip(

					$objWriter,

					($i + 1 + 3),

					'http://schemas.microsoft.com/office/2006/relationships/vbaProject',

					'vbaProject.bin'

				);

				++$i;//increment i if needed for an another relation

			}



		$objWriter->endElement();



		// Return

		return $objWriter->getData();

	}



	/**

	 * Write worksheet relationships to XML format

	 *

	 * Numbering is as follows:

	 * 	rId1 				- Drawings

	 *  rId_hyperlink_x 	- Hyperlinks

	 *

	 * @param 	PHPExcel_Worksheet	$pWorksheet

	 * @param 	int					$pWorksheetId

	 * @param	boolean				$includeCharts	Flag indicating if we should write charts

	 * @return 	string 				XML Output

	 * @throws 	PHPExcel_Writer_Exception

	 */

	public function writeWorksheetRelationships(PHPExcel_Worksheet $pWorksheet = null, $pWorksheetId = 1, $includeCharts = FALSE)

	{

		// Create XML writer

		$objWriter = null;

		if ($this->getParentWriter()->getUseDiskCaching()) {

			$objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_DISK, $this->getParentWriter()->getDiskCachingDirectory());

		} else {

			$objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_MEMORY);

		}



		// XML header

		$objWriter->startDocument('1.0','UTF-8','yes');



		// Relationships

		$objWriter->startElement('Relationships');

		$objWriter->writeAttribute('xmlns', 'http://schemas.openxmlformats.org/package/2006/relationships');



			// Write drawing relationships?

			$d = 0;

			if ($includeCharts) {

				$charts = $pWorksheet->getChartCollection();

			} else {

				$charts = array();

			}

			if (($pWorksheet->getDrawingCollection()->count() > 0) ||

				(count($charts) > 0)) {

				$this->_writeRelationship(

					$objWriter,

					++$d,

					'http://schemas.openxmlformats.org/officeDocument/2006/relationships/drawing',

					'../drawings/drawing' . $pWorksheetId . '.xml'

				);

			}



			// Write chart relationships?

//			$chartCount = 0;

//			$charts = $pWorksheet->getChartCollection();

//			echo 'Chart Rels: ' , count($charts) , '<br />';

//			if (count($charts) > 0) {

//				foreach($charts as $chart) {

//					$this->_writeRelationship(

//						$objWriter,

//						++$d,

//						'http://schemas.openxmlformats.org/officeDocument/2006/relationships/chart',

//						'../charts/chart' . ++$chartCount . '.xml'

//					);

//				}

//			}

//

			// Write hyperlink relationships?

			$i = 1;

			foreach ($pWorksheet->getHyperlinkCollection() as $hyperlink) {

				if (!$hyperlink->isInternal()) {

					$this->_writeRelationship(

						$objWriter,

						'_hyperlink_' . $i,

						'http://schemas.openxmlformats.org/officeDocument/2006/relationships/hyperlink',

						$hyperlink->getUrl(),

						'External'

					);



					++$i;

				}

			}



			// Write comments relationship?

			$i = 1;

			if (count($pWorksheet->getComments()) > 0) {

				$this->_writeRelationship(

					$objWriter,

					'_comments_vml' . $i,

					'http://schemas.openxmlformats.org/officeDocument/2006/relationships/vmlDrawing',

					'../drawings/vmlDrawing' . $pWorksheetId . '.vml'

				);



				$this->_writeRelationship(

					$objWriter,

					'_comments' . $i,

					'http://schemas.openxmlformats.org/officeDocument/2006/relationships/comments',

					'../comments' . $pWorksheetId . '.xml'

				);

			}



			// Write header/footer relationship?

			$i = 1;

			if (count($pWorksheet->getHeaderFooter()->getImages()) > 0) {

				$this->_writeRelationship(

					$objWriter,

					'_headerfooter_vml' . $i,

					'http://schemas.openxmlformats.org/officeDocument/2006/relationships/vmlDrawing',

					'../drawings/vmlDrawingHF' . $pWorksheetId . '.vml'

				);

			}



		$objWriter->endElement();



		// Return

		return $objWriter->getData();

	}



	/**

	 * Write drawing relationships to XML format

	 *

	 * @param 	PHPExcel_Worksheet	$pWorksheet

	 * @param	int					&$chartRef		Chart ID

	 * @param	boolean				$includeCharts	Flag indicating if we should write charts

	 * @return 	string 				XML Output

	 * @throws 	PHPExcel_Writer_Exception

	 */

	public function writeDrawingRelationships(PHPExcel_Worksheet $pWorksheet = null, &$chartRef, $includeCharts = FALSE)

	{

		// Create XML writer

		$objWriter = null;

		if ($this->getParentWriter()->getUseDiskCaching()) {

			$objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_DISK, $this->getParentWriter()->getDiskCachingDirectory());

		} else {

			$objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_MEMORY);

		}



		// XML header

		$objWriter->startDocument('1.0','UTF-8','yes');



		// Relationships

		$objWriter->startElement('Relationships');

		$objWriter->writeAttribute('xmlns', 'http://schemas.openxmlformats.org/package/2006/relationships');



			// Loop through images and write relationships

			$i = 1;

			$iterator = $pWorksheet->getDrawingCollection()->getIterator();

			while ($iterator->valid()) {

				if ($iterator->current() instanceof PHPExcel_Worksheet_Drawing

					|| $iterator->current() instanceof PHPExcel_Worksheet_MemoryDrawing) {

					// Write relationship for image drawing

					$this->_writeRelationship(

						$objWriter,

						$i,

						'http://schemas.openxmlformats.org/officeDocument/2006/relationships/image',

						'../media/' . str_replace(' ', '', $iterator->current()->getIndexedFilename())

					);

				}



				$iterator->next();

				++$i;

			}



			if ($includeCharts) {

				// Loop through charts and write relationships

				$chartCount = $pWorksheet->getChartCount();

				if ($chartCount > 0) {

					for ($c = 0; $c < $chartCount; ++$c) {

						$this->_writeRelationship(

							$objWriter,

							$i++,

							'http://schemas.openxmlformats.org/officeDocument/2006/relationships/chart',

							'../charts/chart' . ++$chartRef . '.xml'

						);

					}

				}

			}



		$objWriter->endElement();



		// Return

		return $objWriter->getData();

	}



	/**

	 * Write header/footer drawing relationships to XML format

	 *

	 * @param 	PHPExcel_Worksheet			$pWorksheet

	 * @return 	string 						XML Output

	 * @throws 	PHPExcel_Writer_Exception

	 */

	public function writeHeaderFooterDrawingRelationships(PHPExcel_Worksheet $pWorksheet = null)

	{

		// Create XML writer

		$objWriter = null;

		if ($this->getParentWriter()->getUseDiskCaching()) {

			$objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_DISK, $this->getParentWriter()->getDiskCachingDirectory());

		} else {

			$objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_MEMORY);

		}



		// XML header

		$objWriter->startDocument('1.0','UTF-8','yes');



		// Relationships

		$objWriter->startElement('Relationships');

		$objWriter->writeAttribute('xmlns', 'http://schemas.openxmlformats.org/package/2006/relationships');



			// Loop through images and write relationships

			foreach ($pWorksheet->getHeaderFooter()->getImages() as $key => $value) {

				// Write relationship for image drawing

				$this->_writeRelationship(

					$objWriter,

					$key,

					'http://schemas.openxmlformats.org/officeDocument/2006/relationships/image',

					'../media/' . $value->getIndexedFilename()

				);

			}



		$objWriter->endElement();



		// Return

		return $objWriter->getData();

	}



	/**

	 * Write Override content type

	 *

	 * @param 	PHPExcel_Shared_XMLWriter 	$objWriter 		XML Writer

	 * @param 	int							$pId			Relationship ID. rId will be prepended!

	 * @param 	string						$pType			Relationship type

	 * @param 	string 						$pTarget		Relationship target

	 * @param 	string 						$pTargetMode	Relationship target mode

	 * @throws 	PHPExcel_Writer_Exception

	 */

	private function _writeRelationship(PHPExcel_Shared_XMLWriter $objWriter = null, $pId = 1, $pType = '', $pTarget = '', $pTargetMode = '')

	{

		if ($pType != '' && $pTarget != '') {

			// Write relationship

			$objWriter->startElement('Relationship');

			$objWriter->writeAttribute('Id', 		'rId' . $pId);

			$objWriter->writeAttribute('Type', 		$pType);

			$objWriter->writeAttribute('Target',	$pTarget);



			if ($pTargetMode != '') {

				$objWriter->writeAttribute('TargetMode',	$pTargetMode);

			}



			$objWriter->endElement();

		} else {

			throw new PHPExcel_Writer_Exception("Invalid parameters passed.");

		}

	}

}

