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<?php

if (!defined('PHPEXCEL_ROOT')) {
    /**
     * @ignore
     */
    define('PHPEXCEL_ROOT', dirname(__FILE__) . '/../../');
    require(PHPEXCEL_ROOT . 'PHPExcel/Autoloader.php');
}

/**
 * PHPExcel_Reader_HTML
 *
 * Copyright (c) 2006 - 2015 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_Reader
 * @copyright  Copyright (c) 2006 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
 * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt    LGPL
 * @version    ##VERSION##, ##DATE##
 */
/** PHPExcel root directory */
class PHPExcel_Reader_HTML extends PHPExcel_Reader_Abstract implements PHPExcel_Reader_IReader
{

/**
     * Input encoding
     *
     * @var string
     */
    protected $inputEncoding = 'ANSI';

/**
     * Sheet index to read
     *
     * @var int
     */
    protected $sheetIndex = 0;

/**
     * Formats
     *
     * @var array
     */
    protected $formats = array(
        'h1' => array(
            'font' => array(
                'bold' => true,
                'size' => 24,
            ),
        ), //    Bold, 24pt
        'h2' => array(
            'font' => array(
                'bold' => true,
                'size' => 18,
            ),
        ), //    Bold, 18pt
        'h3' => array(
            'font' => array(
                'bold' => true,
                'size' => 13.5,
            ),
        ), //    Bold, 13.5pt
        'h4' => array(
            'font' => array(
                'bold' => true,
                'size' => 12,
            ),
        ), //    Bold, 12pt
        'h5' => array(
            'font' => array(
                'bold' => true,
                'size' => 10,
            ),
        ), //    Bold, 10pt
        'h6' => array(
            'font' => array(
                'bold' => true,
                'size' => 7.5,
            ),
        ), //    Bold, 7.5pt
        'a' => array(
            'font' => array(
                'underline' => true,
                'color' => array(
                    'argb' => PHPExcel_Style_Color::COLOR_BLUE,
                ),
            ),
        ), //    Blue underlined
        'hr' => array(
            'borders' => array(
                'bottom' => array(
                    'style' => PHPExcel_Style_Border::BORDER_THIN,
                    'color' => array(
                        PHPExcel_Style_Color::COLOR_BLACK,
                    ),
                ),
            ),
        ), //    Bottom border
    );

protected $rowspan = array();

/**
     * Create a new PHPExcel_Reader_HTML
     */
    public function __construct()
    {
        $this->readFilter = new PHPExcel_Reader_DefaultReadFilter();
    }

/**
 * Validate that the current file is an HTML file
 *
 * @return boolean
 */
 protected function isValidFormat()
 {
 // Reading 2048 bytes should be enough to validate that the format is HTML
 $data = fread($this->fileHandle, 2048);
 if ((strpos($data, '<') !== false) &&
 (strlen($data) !== strlen(strip_tags($data)))) {
 return true;
 }

return false;
    }

/**
     * Loads PHPExcel from file
     *
     * @param  string                    $pFilename
     * @return PHPExcel
     * @throws PHPExcel_Reader_Exception
     */
    public function load($pFilename)
    {
        // Create new PHPExcel
        $objPHPExcel = new PHPExcel();

// Load into this instance
        return $this->loadIntoExisting($pFilename, $objPHPExcel);
    }

/**
     * Set input encoding
     *
     * @param string $pValue Input encoding
     */
    public function setInputEncoding($pValue = 'ANSI')
    {
        $this->inputEncoding = $pValue;

return $this;
    }

/**
     * Get input encoding
     *
     * @return string
     */
    public function getInputEncoding()
    {
        return $this->inputEncoding;
    }

//    Data Array used for testing only, should write to PHPExcel object on completion of tests
    protected $dataArray = array();
    protected $tableLevel = 0;
    protected $nestedColumn = array('A');

protected function setTableStartColumn($column)
    {
        if ($this->tableLevel == 0) {
            $column = 'A';
        }
        ++$this->tableLevel;
        $this->nestedColumn[$this->tableLevel] = $column;

return $this->nestedColumn[$this->tableLevel];
    }

protected function getTableStartColumn()
    {
        return $this->nestedColumn[$this->tableLevel];
    }

protected function releaseTableStartColumn()
    {
        --$this->tableLevel;

return array_pop($this->nestedColumn);
    }

protected function flushCell($sheet, $column, $row, &$cellContent)
 {
 if (is_string($cellContent)) {
 // Simple String content
 if (trim($cellContent) > '') {
 // Only actually write it if there's content in the string
// echo 'FLUSH CELL: ' , $column , $row , ' => ' , $cellContent , ' ';
 // Write to worksheet to be done here...
 // ... we return the cell so we can mess about with styles more easily
 $sheet->setCellValue($column . $row, $cellContent, true);
 $this->dataArray[$row][$column] = $cellContent;
 }
 } else {
 // We have a Rich Text run
 // TODO
 $this->dataArray[$row][$column] = 'RICH TEXT: ' . $cellContent;
 }
 $cellContent = (string) '';
 }

protected function processDomElement(DOMNode $element, $sheet, &$row, &$column, &$cellContent, $format = null)
 {
 foreach ($element->childNodes as $child) {
 if ($child instanceof DOMText) {
 $domText = preg_replace('/\s+/u', ' ', trim($child->nodeValue));
 if (is_string($cellContent)) {
 // simply append the text if the cell content is a plain text string
 $cellContent .= $domText;
 } else {
 // but if we have a rich text run instead, we need to append it correctly
 // TODO
 }
 } elseif ($child instanceof DOMElement) {
// echo 'DOM ELEMENT: ' , strtoupper($child->nodeName) , ' ';

$attributeArray = array();
 foreach ($child->attributes as $attribute) {
// echo 'ATTRIBUTE: ' , $attribute->name , ' => ' , $attribute->value , ' ';
 $attributeArray[$attribute->name] = $attribute->value;
 }

switch ($child->nodeName) {
 case 'meta':
 foreach ($attributeArray as $attributeName => $attributeValue) {
 switch ($attributeName) {
 case 'content':
 // TODO
 // Extract character set, so we can convert to UTF-8 if required
 break;
 }
 }
 $this->processDomElement($child, $sheet, $row, $column, $cellContent);
 break;
 case 'title':
 $this->processDomElement($child, $sheet, $row, $column, $cellContent);
 $sheet->setTitle($cellContent);
 $cellContent = '';
 break;
 case 'span':
 case 'div':
 case 'font':
 case 'i':
 case 'em':
 case 'strong':
 case 'b':
// echo 'STYLING, SPAN OR DIV ';
 if ($cellContent > '') {
 $cellContent .= ' ';
 }
 $this->processDomElement($child, $sheet, $row, $column, $cellContent);
 if ($cellContent > '') {
 $cellContent .= ' ';
 }
// echo 'END OF STYLING, SPAN OR DIV ';
 break;
 case 'hr':
 $this->flushCell($sheet, $column, $row, $cellContent);
 ++$row;
 if (isset($this->formats[$child->nodeName])) {
 $sheet->getStyle($column . $row)->applyFromArray($this->formats[$child->nodeName]);
 } else {
 $cellContent = '----------';
 $this->flushCell($sheet, $column, $row, $cellContent);
 }
 ++$row;
 // Add a break after a horizontal rule, simply by allowing the code to dropthru
 case 'br':
 if ($this->tableLevel > 0) {
 // If we're inside a table, replace with a \n
 $cellContent .= "\n";
 } else {
 // Otherwise flush our existing content and move the row cursor on
 $this->flushCell($sheet, $column, $row, $cellContent);
 ++$row;
 }
// echo 'HARD LINE BREAK: ' , ' ';
 break;
 case 'a':
// echo 'START OF HYPERLINK: ' , ' ';
 foreach ($attributeArray as $attributeName => $attributeValue) {
 switch ($attributeName) {
 case 'href':
// echo 'Link to ' , $attributeValue , ' ';
 $sheet->getCell($column . $row)->getHyperlink()->setUrl($attributeValue);
 if (isset($this->formats[$child->nodeName])) {
 $sheet->getStyle($column . $row)->applyFromArray($this->formats[$child->nodeName]);
 }
 break;
 }
 }
 $cellContent .= ' ';
 $this->processDomElement($child, $sheet, $row, $column, $cellContent);
// echo 'END OF HYPERLINK:' , ' ';
 break;
 case 'h1':
 case 'h2':
 case 'h3':
 case 'h4':
 case 'h5':
 case 'h6':
 case 'ol':
 case 'ul':
 case 'p':
 if ($this->tableLevel > 0) {
 // If we're inside a table, replace with a \n
 $cellContent .= "\n";
// echo 'LIST ENTRY: ' , ' ';
 $this->processDomElement($child, $sheet, $row, $column, $cellContent);
// echo 'END OF LIST ENTRY:' , ' ';
 } else {
 if ($cellContent > '') {
 $this->flushCell($sheet, $column, $row, $cellContent);
 $row++;
 }
// echo 'START OF PARAGRAPH: ' , ' ';
 $this->processDomElement($child, $sheet, $row, $column, $cellContent);
// echo 'END OF PARAGRAPH:' , ' ';
 $this->flushCell($sheet, $column, $row, $cellContent);

if (isset($this->formats[$child->nodeName])) {
                                $sheet->getStyle($column . $row)->applyFromArray($this->formats[$child->nodeName]);
                            }

$row++;
 $column = 'A';
 }
 break;
 case 'li':
 if ($this->tableLevel > 0) {
 // If we're inside a table, replace with a \n
 $cellContent .= "\n";
// echo 'LIST ENTRY: ' , ' ';
 $this->processDomElement($child, $sheet, $row, $column, $cellContent);
// echo 'END OF LIST ENTRY:' , ' ';
 } else {
 if ($cellContent > '') {
 $this->flushCell($sheet, $column, $row, $cellContent);
 }
 ++$row;
// echo 'LIST ENTRY: ' , ' ';
 $this->processDomElement($child, $sheet, $row, $column, $cellContent);
// echo 'END OF LIST ENTRY:' , ' ';
 $this->flushCell($sheet, $column, $row, $cellContent);
 $column = 'A';
 }
 break;
 case 'table':
 $this->flushCell($sheet, $column, $row, $cellContent);
 $column = $this->setTableStartColumn($column);
// echo 'START OF TABLE LEVEL ' , $this->tableLevel , ' ';
 if ($this->tableLevel > 1) {
 --$row;
 }
 $this->processDomElement($child, $sheet, $row, $column, $cellContent);
// echo 'END OF TABLE LEVEL ' , $this->tableLevel , ' ';
 $column = $this->releaseTableStartColumn();
 if ($this->tableLevel > 1) {
 ++$column;
 } else {
 ++$row;
 }
 break;
 case 'thead':
 case 'tbody':
 $this->processDomElement($child, $sheet, $row, $column, $cellContent);
 break;
 case 'tr':
 $column = $this->getTableStartColumn();
 $cellContent = '';
// echo 'START OF TABLE ' , $this->tableLevel , ' ROW ';
 $this->processDomElement($child, $sheet, $row, $column, $cellContent);
 ++$row;
// echo 'END OF TABLE ' , $this->tableLevel , ' ROW ';
 break;
 case 'th':
 case 'td':
// echo 'START OF TABLE ' , $this->tableLevel , ' CELL ';
 $this->processDomElement($child, $sheet, $row, $column, $cellContent);
// echo 'END OF TABLE ' , $this->tableLevel , ' CELL ';

while (isset($this->rowspan[$column . $row])) {
                            ++$column;
                        }

$this->flushCell($sheet, $column, $row, $cellContent);

//                        if (isset($attributeArray['style']) && !empty($attributeArray['style'])) {
//                            $styleAry = $this->getPhpExcelStyleArray($attributeArray['style']);
//
//                            if (!empty($styleAry)) {
//                                $sheet->getStyle($column . $row)->applyFromArray($styleAry);
//                            }
//                        }

if (isset($attributeArray['rowspan']) && isset($attributeArray['colspan'])) {
 //create merging rowspan and colspan
 $columnTo = $column;
 for ($i = 0; $i < $attributeArray['colspan'] - 1; $i++) {
 ++$columnTo;
 }
 $range = $column . $row . ':' . $columnTo . ($row + $attributeArray['rowspan'] - 1);
 foreach (\PHPExcel_Cell::extractAllCellReferencesInRange($range) as $value) {
 $this->rowspan[$value] = true;
 }
 $sheet->mergeCells($range);
 $column = $columnTo;
 } elseif (isset($attributeArray['rowspan'])) {
 //create merging rowspan
 $range = $column . $row . ':' . $column . ($row + $attributeArray['rowspan'] - 1);
 foreach (\PHPExcel_Cell::extractAllCellReferencesInRange($range) as $value) {
 $this->rowspan[$value] = true;
 }
 $sheet->mergeCells($range);
 } elseif (isset($attributeArray['colspan'])) {
 //create merging colspan
 $columnTo = $column;
 for ($i = 0; $i < $attributeArray['colspan'] - 1; $i++) {
 ++$columnTo;
 }
 $sheet->mergeCells($column . $row . ':' . $columnTo . $row);
 $column = $columnTo;
 }
 ++$column;
 break;
 case 'body':
 $row = 1;
 $column = 'A';
 $content = '';
 $this->tableLevel = 0;
 $this->processDomElement($child, $sheet, $row, $column, $cellContent);
 break;
 default:
 $this->processDomElement($child, $sheet, $row, $column, $cellContent);
 }
 }
 }
 }

/**
     * Loads PHPExcel from file into PHPExcel instance
     *
     * @param  string                    $pFilename
     * @param  PHPExcel                  $objPHPExcel
     * @return PHPExcel
     * @throws PHPExcel_Reader_Exception
     */
    public function loadIntoExisting($pFilename, PHPExcel $objPHPExcel)
    {
        // Open file to validate
        $this->openFile($pFilename);
        if (!$this->isValidFormat()) {
            fclose($this->fileHandle);
            throw new PHPExcel_Reader_Exception($pFilename . " is an Invalid HTML file.");
        }
        //    Close after validating
        fclose($this->fileHandle);

// Create new PHPExcel
 while ($objPHPExcel->getSheetCount() <= $this->sheetIndex) {
 $objPHPExcel->createSheet();
 }
 $objPHPExcel->setActiveSheetIndex($this->sheetIndex);

//    Create a new DOM object
        $dom = new domDocument;
        //    Reload the HTML file into the DOM object
        $loaded = $dom->loadHTML($this->securityScanFile($pFilename));
        if ($loaded === false) {
            throw new PHPExcel_Reader_Exception('Failed to load ', $pFilename, ' as a DOM Document');
        }

//    Discard white space
        $dom->preserveWhiteSpace = false;

$row = 0;
        $column = 'A';
        $content = '';
        $this->processDomElement($dom, $objPHPExcel->getActiveSheet(), $row, $column, $content);

// Return
        return $objPHPExcel;
    }

/**
     * Get sheet index
     *
     * @return int
     */
    public function getSheetIndex()
    {
        return $this->sheetIndex;
    }

/**
     * Set sheet index
     *
     * @param  int                  $pValue Sheet index
     * @return PHPExcel_Reader_HTML
     */
    public function setSheetIndex($pValue = 0)
    {
        $this->sheetIndex = $pValue;

return $this;
    }

/**
 * Scan theXML for use of <!ENTITY to prevent XXE/XEE attacks
 *
 * @param string $xml
 * @throws PHPExcel_Reader_Exception
 */
 public function securityScan($xml)
 {
 $pattern = '/\\0?' . implode('\\0?', str_split('<!ENTITY')) . '\\0?/';
 if (preg_match($pattern, $xml)) {
 throw new PHPExcel_Reader_Exception('Detected use of ENTITY in XML, spreadsheet file load() aborted to prevent XXE/XEE attacks');
 }
 return $xml;
 }
}