<?php
require 'Segment.php';
class OdfException extends Exception
{}
/**
 * Templating class for odt file
 * You need PHP 5.2 at least
 * You need Zip Extension or PclZip library
 * Encoding : ISO-8859-1
 *
 * @copyright  GPL License 2008 - Julien Pauli - Cyril PIERRE de GEYER - Anaska (http://www.anaska.com)
 * @copyright  GPL License 2010 - Laurent Destailleur - eldy@users.sourceforge.net
 * @copyright  GPL License 2010 -  Vikas Mahajan - http://vikasmahajan.wordpress.com
 * @copyright  GPL License 2012 - Stephen Larroque - lrq3000@gmail.com
 * @license    http://www.gnu.org/copyleft/gpl.html  GPL License
 * @version 1.4.6 (last update 2013-04-07)
 */
class Odf
{
	protected $config = array(
	'ZIP_PROXY' => 'PclZipProxy',	// PclZipProxy, PhpZipProxy
	'DELIMITER_LEFT' => '{',
	'DELIMITER_RIGHT' => '}',
	'PATH_TO_TMP' => '/tmp'
	);
	protected $file;
	protected $contentXml;			// To store content of content.xml file
	protected $stylesXml;			// To store content of styles.xml file
	protected $manifestXml;			// To store content of META-INF/manifest.xml file
	protected $tmpfile;
	protected $tmpdir='';
	protected $images = array();
	protected $vars = array();
	protected $segments = array();
	const PIXEL_TO_CM = 0.026458333;
	/**
	 * Class constructor
	 *
	 * @param string $filename the name of the odt file
	 * @throws OdfException
	 */
	public function __construct($filename, $config = array())
	{
		clearstatcache();

		if (! is_array($config)) {
			throw new OdfException('Configuration data must be provided as array');
		}
		foreach ($config as $configKey => $configValue) {
			if (array_key_exists($configKey, $this->config)) {
				$this->config[$configKey] = $configValue;
			}
		}

		$md5uniqid = md5(uniqid());
		if ($this->config['PATH_TO_TMP']) $this->tmpdir = preg_replace('|[\/]$|','',$this->config['PATH_TO_TMP']);	// Remove last \ or /
		$this->tmpdir .= ($this->tmpdir?'/':'').$md5uniqid;
		$this->tmpfile = $this->tmpdir.'/'.$md5uniqid.'.odt';	// We keep .odt extension to allow OpenOffice usage during debug.

		// A working directory is required for some zip proxy like PclZipProxy
		if (in_array($this->config['ZIP_PROXY'],array('PclZipProxy')) && ! is_dir($this->config['PATH_TO_TMP'])) {
			throw new OdfException('Temporary directory '.$this->config['PATH_TO_TMP'].' must exists');
		}

		// Create tmp direcoty (will be deleted in destructor)
		if (!file_exists($this->tmpdir)) {
			$result=mkdir($this->tmpdir);
		}

		// Load zip proxy
		$zipHandler = $this->config['ZIP_PROXY'];
		if (!defined('PCLZIP_TEMPORARY_DIR')) define('PCLZIP_TEMPORARY_DIR',$this->tmpdir);
		include_once('zip/'.$zipHandler.'.php');
		if (! class_exists($this->config['ZIP_PROXY'])) {
			throw new OdfException($this->config['ZIP_PROXY'] . ' class not found - check your php settings');
		}
		$this->file = new $zipHandler($this->tmpdir);


		if ($this->file->open($filename) !== true) {	// This also create the tmpdir directory
			throw new OdfException("Error while Opening the file '$filename' - Check your odt filename");
		}
		if (($this->contentXml = $this->file->getFromName('content.xml')) === false) {
			throw new OdfException("Nothing to parse - Check that the content.xml file is correctly formed in source file '$filename'");
		}
		if (($this->manifestXml = $this->file->getFromName('META-INF/manifest.xml')) === false) {
			throw new OdfException("Something is wrong with META-INF/manifest.xml in source file '$filename'");
		}
		if (($this->stylesXml = $this->file->getFromName('styles.xml')) === false) {
			throw new OdfException("Nothing to parse - Check that the styles.xml file is correctly formed in source file '$filename'");
		}
		$this->file->close();


		//print "tmpdir=".$tmpdir;
		//print "filename=".$filename;
		//print "tmpfile=".$tmpfile;

		copy($filename, $this->tmpfile);

		$this->_moveRowSegments();
	}

	/**
	 * Assing a template variable
	 *
	 * @param string $key name of the variable within the template
	 * @param string $value replacement value
	 * @param bool $encode if true, special XML characters are encoded
	 * @throws OdfException
	 * @return odf
	 */
	public function setVars($key, $value, $encode = true, $charset = 'ISO-8859')
	{
		$tag = $this->config['DELIMITER_LEFT'] . $key . $this->config['DELIMITER_RIGHT'];
		// TODO Warning string may be:
		// <text:span text:style-name="T13">{</text:span><text:span text:style-name="T12">aaa</text:span><text:span text:style-name="T13">}</text:span>
		// instead of {aaa} so we should enhance this function.
		//print $key.'-'.$value.'-'.strpos($this->contentXml, $this->config['DELIMITER_LEFT'] . $key . $this->config['DELIMITER_RIGHT']).'<br>';
		if (strpos($this->contentXml, $tag) === false && strpos($this->stylesXml , $tag) === false) {
			//if (strpos($this->contentXml, '">'. $key . '</text;span>') === false) {
			throw new OdfException("var $key not found in the document");
			//}
		}

		$value=$this->htmlToUTFAndPreOdf($value);

		$value = $encode ? htmlspecialchars($value) : $value;
		$value = ($charset == 'ISO-8859') ? utf8_encode($value) : $value;

		$value=$this->preOdfToOdf($value);

		$this->vars[$tag] = $value;
		return $this;
	}


	/**
	 * Function to convert a HTML string into an ODT string
	 *
	 * @param	string	$value	String to convert
	 */
	public function htmlToUTFAndPreOdf($value)
	{
		// We decode into utf8, entities
		$value=dol_html_entity_decode($value, ENT_QUOTES);

		// We convert html tags
		$ishtml=dol_textishtml($value);
		if ($ishtml)
		{
	        // If string is "MYPODUCT - Desc <strong>bold</strong> with &eacute; accent<br />\n<br />\nUn texto en espa&ntilde;ol ?"
    	    // Result after clean must be "MYPODUCT - Desc bold with é accent\n\nUn texto en espa&ntilde;ol ?"

			// We want to ignore \n and we want all <br> to be \n
			$value=preg_replace('/(\r\n|\r|\n)/i','',$value);
			$value=preg_replace('/<br>/i',"\n",$value);
			$value=preg_replace('/<br\s+[^<>\/]*>/i',"\n",$value);
			$value=preg_replace('/<br\s+[^<>\/]*\/>/i',"\n",$value);

			//$value=preg_replace('/<strong>/','__lt__text:p text:style-name=__quot__bold__quot____gt__',$value);
			//$value=preg_replace('/<\/strong>/','__lt__/text:p__gt__',$value);

			$value=dol_string_nohtmltag($value, 0);
		}

		return $value;
	}


	/**
	 * Function to convert a HTML string into an ODT string
	 *
	 * @param	string	$value	String to convert
	 */
	public function preOdfToOdf($value)
	{
		$value = str_replace("\n", "<text:line-break/>", $value);

		//$value = str_replace("__lt__", "<", $value);
		//$value = str_replace("__gt__", ">", $value);
		//$value = str_replace("__quot__", '"', $value);

		return $value;
	}

	/**
	 * Evaluating php codes inside the ODT and output the buffer (print, echo) inplace of the code
	 *
	 */
	public function phpEval()
	{
		preg_match_all('/[\{\<]\?(php)?\s+(?P<content>.+)\?[\}\>]/iU',$this->contentXml, $matches); // detecting all {?php code ?} or <?php code ? >
		for ($i=0;$i < count($matches['content']);$i++) {
			try {
				$ob_output = ''; // flush the output for each code. This var will be filled in by the eval($code) and output buffering : any print or echo or output will be redirected into this variable
				$code = $matches['content'][$i];
				ob_start();
				eval ($code);
				$ob_output = ob_get_contents(); // send the content of the buffer into $ob_output
				$this->contentXml = str_replace($matches[0][$i], $ob_output, $this->contentXml);
				ob_end_clean();
			} catch (Exception $e) {
				ob_end_clean();
				$this->contentXml = str_replace($matches[0][$i], 'ERROR: there was a problem while evaluating this portion of code, please fix it: '.$e, $this->contentXml);
			}
		}
		return 0;
	}

	/**
	 * Assign a template variable as a picture
	 *
	 * @param string $key name of the variable within the template
	 * @param string $value path to the picture
	 * @throws OdfException
	 * @return odf
	 */
	public function setImage($key, $value)
	{
		$filename = strtok(strrchr($value, '/'), '/.');
		$file = substr(strrchr($value, '/'), 1);
		$size = @getimagesize($value);
		if ($size === false) {
			throw new OdfException("Invalid image");
		}
		list ($width, $height) = $size;
		$width *= self::PIXEL_TO_CM;
		$height *= self::PIXEL_TO_CM;
		$xml = <<<IMG
			<draw:frame draw:style-name="fr1" draw:name="$filename" text:anchor-type="aschar" svg:width="{$width}cm" svg:height="{$height}cm" draw:z-index="3"><draw:image xlink:href="Pictures/$file" xlink:type="simple" xlink:show="embed" xlink:actuate="onLoad"/></draw:frame>
IMG;
		$this->images[$value] = $file;
		$this->setVars($key, $xml, false);
		return $this;
	}

	/**
	 * Move segment tags for lines of tables
	 * Called automatically within the constructor
	 *
	 * @return void
	 */
	private function _moveRowSegments()
	{
		// Search all possible rows in the document
		$reg1 = "#<table:table-row[^>]*>(.*)</table:table-row>#smU";
		preg_match_all($reg1, $this->contentXml, $matches);
		for ($i = 0, $size = count($matches[0]); $i < $size; $i++) {
			// Check if the current row contains a segment row.*
			$reg2 = '#\[!--\sBEGIN\s(row.[\S]*)\s--\](.*)\[!--\sEND\s\\1\s--\]#sm';
			if (preg_match($reg2, $matches[0][$i], $matches2)) {
				$balise = str_replace('row.', '', $matches2[1]);
				// Move segment tags around the row
				$replace = array(
				'[!-- BEGIN ' . $matches2[1] . ' --]'	=> '',
				'[!-- END ' . $matches2[1] . ' --]'		=> '',
				'<table:table-row'							=> '[!-- BEGIN ' . $balise . ' --]<table:table-row',
				'</table:table-row>'						=> '</table:table-row>[!-- END ' . $balise . ' --]'
				);
				$replacedXML = str_replace(array_keys($replace), array_values($replace), $matches[0][$i]);
				$this->contentXml = str_replace($matches[0][$i], $replacedXML, $this->contentXml);
			}
		}
	}

	/**
	 * Merge template variables
	 * Called automatically for a save
	 *
	 * @param  string	$type		'content' or 'styles'
	 * @return void
	 */
	private function _parse($type='content')
	{
		// Conditionals substitution
		// Note: must be done before content substitution, else the variable will be replaced by its value and the conditional won't work anymore
		foreach($this->vars as $key => $value)
		{
			// If value is true (not 0 nor false nor null nor empty string)
			if($value)
			{
				// Remove the IF tag
				$this->contentXml = str_replace('[!-- IF '.$key.' --]', '', $this->contentXml);
				// Remove everything between the ELSE tag (if it exists) and the ENDIF tag
				$reg = '@(\[!--\sELSE\s' . $key . '\s--\](.*))?\[!--\sENDIF\s' . $key . '\s--\]@smU'; // U modifier = all quantifiers are non-greedy
				$this->contentXml = preg_replace($reg, '', $this->contentXml);
			}
			// Else the value is false, then two cases: no ELSE and we're done, or there is at least one place where there is an ELSE clause, then we replace it
			else
			{
				// Find all conditional blocks for this variable: from IF to ELSE and to ENDIF
				$reg = '@\[!--\sIF\s' . $key . '\s--\](.*)(\[!--\sELSE\s' . $key . '\s--\](.*))?\[!--\sENDIF\s' . $key . '\s--\]@smU'; // U modifier = all quantifiers are non-greedy
				preg_match_all($reg, $this->contentXml, $matches, PREG_SET_ORDER);
				foreach($matches as $match) { // For each match, if there is an ELSE clause, we replace the whole block by the value in the ELSE clause
					if (!empty($match[3])) $this->contentXml = str_replace($match[0], $match[3], $this->contentXml);
				}
				// Cleanup the other conditional blocks (all the others where there were no ELSE clause, we can just remove them altogether)
				$this->contentXml = preg_replace($reg, '', $this->contentXml);
			}
		}

		// Content (variable) substitution
		if ($type == 'content')	$this->contentXml = str_replace(array_keys($this->vars), array_values($this->vars), $this->contentXml);
		// Styles substitution
		if ($type == 'styles')	$this->stylesXml = str_replace(array_keys($this->vars), array_values($this->vars), $this->stylesXml);

	}

	/**
	 * Add the merged segment to the document
	 *
	 * @param Segment $segment
	 * @throws OdfException
	 * @return odf
	 */
	public function mergeSegment(Segment $segment)
	{
		if (! array_key_exists($segment->getName(), $this->segments)) {
			throw new OdfException($segment->getName() . 'cannot be parsed, has it been set yet ?');
		}
		$string = $segment->getName();
		// $reg = '@<text:p[^>]*>\[!--\sBEGIN\s' . $string . '\s--\](.*)\[!--.+END\s' . $string . '\s--\]<\/text:p>@smU';
		$reg = '@\[!--\sBEGIN\s' . $string . '\s--\](.*)\[!--.+END\s' . $string . '\s--\]@smU';
		$this->contentXml = preg_replace($reg, $segment->getXmlParsed(), $this->contentXml);
		return $this;
	}

	/**
	 * Display all the current template variables
	 *
	 * @return string
	 */
	public function printVars()
	{
		return print_r('<pre>' . print_r($this->vars, true) . '</pre>', true);
	}

	/**
	 * Display the XML content of the file from odt document
	 * as it is at the moment
	 *
	 * @return string
	 */
	public function __toString()
	{
		return $this->contentXml;
	}

	/**
	 * Display loop segments declared with setSegment()
	 *
	 * @return string
	 */
	public function printDeclaredSegments()
	{
		return '<pre>' . print_r(implode(' ', array_keys($this->segments)), true) . '</pre>';
	}

	/**
	 * Declare a segment in order to use it in a loop
	 *
	 * @param string $segment
	 * @throws OdfException
	 * @return Segment
	 */
	public function setSegment($segment)
	{
		if (array_key_exists($segment, $this->segments)) {
			return $this->segments[$segment];
		}
		// $reg = "#\[!--\sBEGIN\s$segment\s--\]<\/text:p>(.*)<text:p\s.*>\[!--\sEND\s$segment\s--\]#sm";
		$reg = "#\[!--\sBEGIN\s$segment\s--\](.*)\[!--\sEND\s$segment\s--\]#sm";
		if (preg_match($reg, html_entity_decode($this->contentXml), $m) == 0) {
			throw new OdfException("'$segment' segment not found in the document");
		}
		$this->segments[$segment] = new Segment($segment, $m[1], $this);
		return $this->segments[$segment];
	}
	/**
	 * Save the odt file on the disk
	 *
	 * @param string $file name of the desired file
	 * @throws OdfException
	 * @return void
	 */
	public function saveToDisk($file = null)
	{
		if ($file !== null && is_string($file)) {
			if (file_exists($file) && !(is_file($file) && is_writable($file))) {
				throw new OdfException('Permission denied : can\'t create ' . $file);
			}
			$this->_save();
			copy($this->tmpfile, $file);
		} else {
			$this->_save();
		}
	}

	/**
	 * Write output file onto disk
	 *
	 * @throws OdfException
	 * @return void
	 */
	private function _save()
	{
		$res=$this->file->open($this->tmpfile);    // tmpfile is odt template
		$this->_parse('content');
		$this->_parse('styles');

		if (! $this->file->addFromString('content.xml', $this->contentXml)) {
			throw new OdfException('Error during file export addFromString');
		}
		if (! $this->file->addFromString('styles.xml', $this->stylesXml)) {
			throw new OdfException('Error during file export addFromString');
		}
		foreach ($this->images as $imageKey => $imageValue) {
			// Add the image inside the ODT document
			$this->file->addFile($imageKey, 'Pictures/' . $imageValue);
			// Add the image to the Manifest (which maintains a list of images, necessary to avoid "Corrupt ODT file. Repair?" when opening the file with LibreOffice)
			$this->addImageToManifest($imageValue);
		}
		if (! $this->file->addFromString('./META-INF/manifest.xml', $this->manifestXml)) {
			throw new OdfException('Error during file export: manifest.xml');
		}
		$this->file->close();
	}

	/**
	 * Update Manifest file according to added image files
	 *
	 * @param string	$file		Image file to add into manifest content
	 */
	public function addImageToManifest($file)
	{
		// Get the file extension
		$ext = substr(strrchr($val, '.'), 1);
		// Create the correct image XML entry to add to the manifest (this is necessary because ODT format requires that we keep a list of the images in the manifest.xml)
		$add = ' <manifest:file-entry manifest:media-type="image/'.$ext.'" manifest:full-path="Pictures/'.$file.'"/>'."\n";
		// Append the image to the manifest
		$this->manifestXml = str_replace('</manifest:manifest>', $add.'</manifest:manifest>', $this->manifestXml); // we replace the manifest closing tag by the image XML entry + manifest closing tag (this results in appending the data, we do not overwrite anything)
	}

	/**
	 * Export the file as attached file by HTTP
	 *
	 * @param string $name (optional)
	 * @throws OdfException
	 * @return void
	 */
	public function exportAsAttachedFile($name="")
	{
		$this->_save();
		if (headers_sent($filename, $linenum)) {
			throw new OdfException("headers already sent ($filename at $linenum)");
		}

		if( $name == "" )
		{
			$name = md5(uniqid()) . ".odt";
		}

		header('Content-type: application/vnd.oasis.opendocument.text');
		header('Content-Disposition: attachment; filename="'.$name.'"');
		header('Content-Length: '.filesize($this->tmpfile));
		readfile($this->tmpfile);
	}

	/**
	 * Convert the ODT file to PDF and export the file as attached file by HTTP
	 * Note: you need to have JODConverter and OpenOffice or LibreOffice installed and executable on the same system as where this php script will be executed. You also need to chmod +x odt2pdf.sh
	 *
	 * @param string $name (optional)
	 * @throws OdfException
	 * @return void
	 */
	public function exportAsAttachedPDF($name="")
	{
		global $conf;

		if( $name == "" ) $name = md5(uniqid());

		dol_syslog(get_class($this).'::exportAsAttachedPDF $name='.$name, LOG_DEBUG);
		$this->saveToDisk($name);

		$execmethod=(empty($conf->global->MAIN_EXEC_USE_POPEN)?1:2);	// 1 or 2

		$name=str_replace('.odt', '', $name);
		if (!empty($conf->global->MAIN_DOL_SCRIPTS_ROOT)) {
			$command = $conf->global->MAIN_DOL_SCRIPTS_ROOT.'/scripts/odt2pdf/odt2pdf.sh '.$name;
		}else {
			$command = '../../scripts/odt2pdf/odt2pdf.sh '.$name;
		}


		//$dirname=dirname($name);
		//$command = DOL_DOCUMENT_ROOT.'/includes/odtphp/odt2pdf.sh '.$name.' '.$dirname;

		dol_syslog(get_class($this).'::exportAsAttachedPDF $execmethod='.$execmethod.' Run command='.$command,LOG_DEBUG);
		if ($execmethod == 1)
		{
			exec($command, $output_arr, $retval);
		}
		if ($execmethod == 2)
		{
			$ok=0;
			$handle = fopen($outputfile, 'w');
			if ($handle)
			{
				dol_syslog(get_class($this)."Run command ".$command,LOG_DEBUG);
				$handlein = popen($command, 'r');
				while (!feof($handlein))
				{
					$read = fgets($handlein);
					fwrite($handle,$read);
					$output_arr[]=$read;
				}
				pclose($handlein);
				fclose($handle);
			}
			if (! empty($conf->global->MAIN_UMASK)) @chmod($outputfile, octdec($conf->global->MAIN_UMASK));
		}

		if($retval == 0)
		{
			dol_syslog(get_class($this).'::exportAsAttachedPDF $ret_val='.$retval, LOG_DEBUG);
			if (headers_sent($filename, $linenum)) {
				throw new OdfException("headers already sent ($filename at $linenum)");
			}

			if (!empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
				header('Content-type: application/pdf');
				header('Content-Disposition: attachment; filename="'.$name.'.pdf"');
				readfile("$name.pdf");
			}
			if (!empty($conf->global->MAIN_ODT_AS_PDF_DEL_SOURCE))
				unlink("$name.odt");
		} else {
			dol_syslog(get_class($this).'::exportAsAttachedPDF $ret_val='.$retval, LOG_DEBUG);
			dol_syslog(get_class($this).'::exportAsAttachedPDF $output_arr='.var_export($output_arr,true), LOG_DEBUG);

			if ($retval==126) {
				throw new OdfException('Permission execute convert script : ' . $command);
			}
			else {
				foreach($output_arr as $line) {
					$errors.= $line."<br>";
				}
				throw new OdfException('ODT to PDF convert fail : ' . $errors);
			}
		}
	}

	/**
	 * Returns a variable of configuration
	 *
	 * @return string The requested variable of configuration
	 */
	public function getConfig($configKey)
	{
		if (array_key_exists($configKey, $this->config)) {
			return $this->config[$configKey];
		}
		return false;
	}
	/**
	 * Returns the temporary working file
	 *
	 * @return string le chemin vers le fichier temporaire de travail
	 */
	public function getTmpfile()
	{
		return $this->tmpfile;
	}

	/**
	 * Delete the temporary file when the object is destroyed
	 */
	public function __destruct()
	{
		if (file_exists($this->tmpfile)) {
			unlink($this->tmpfile);
		}

		if (file_exists($this->tmpdir)) {
			$this->_rrmdir($this->tmpdir);
			rmdir($this->tmpdir);
		}
	}

	/**
	 * Empty the temporary working directory recursively
	 * @param $dir the temporary working directory
	 * @return void
	 */
	private function _rrmdir($dir)
	{
		if ($handle = opendir($dir)) {
			while (false !== ($file = readdir($handle))) {
				if ($file != '.' && $file != '..') {
					if (is_dir($dir . '/' . $file)) {
						$this->_rrmdir($dir . '/' . $file);
						rmdir($dir . '/' . $file);
					} else {
						unlink($dir . '/' . $file);
					}
				}
			}
			closedir($handle);
		}
	}

	/**
	 * return the value present on odt in [valuename][/valuename]
	 * @param string $value name balise in the template
	 * @return string the value inside the balise
	 *
	 */
	public function getvalue($valuename)
	{
		$searchreg="/\\[".$valuename."\\](.*)\\[\\/".$valuename."\\]/";
		preg_match($searchreg, $this->contentXml, $matches); 
		$this->contentXml = preg_replace($searchreg, "", $this->contentXml);
		return  $matches[1];
	}

}

?>
