<?php
/**
 * 2007-2015 PrestaShop
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Open Software License (OSL 3.0)
 * that is bundled with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://opensource.org/licenses/osl-3.0.php
 * 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@prestashop.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade PrestaShop to newer
 * versions in the future. If you wish to customize PrestaShop for your
 * needs please refer to http://www.prestashop.com for more information.
 *
 *  @author 	PrestaShop SA <contact@prestashop.com>
 *  @copyright  2007-2015 PrestaShop SA
 *  @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 *  International Registered Trademark & Property of PrestaShop SA
 */

require_once(_PS_TOOL_DIR_.'tcpdf/config/lang/eng.php');
require_once(_PS_TOOL_DIR_.'tcpdf/tcpdf.php');

/**
 * @since 1.5
 */
class PDFGeneratorCore extends TCPDF
{
	const DEFAULT_FONT = 'helvetica';

	public $header;
	public $footer;
	public $content;
	public $font;

	public $font_by_lang = array(
		'ja' => 'cid0jp',
		'bg' => 'freeserif',
		'ru' => 'freeserif',
		'uk' => 'freeserif',
		'mk' => 'freeserif',
		'el' => 'freeserif',
		'vn' => 'dejavusans',
		'pl' => 'dejavusans',
		'ar' => 'dejavusans',
		'fa' => 'dejavusans',
		'ur' => 'dejavusans',
		'az' => 'dejavusans',
		'ca' => 'dejavusans',
		'gl' => 'dejavusans',
		'hr' => 'dejavusans',
		'sr' => 'dejavusans',
		'si' => 'dejavusans',
		'cs' => 'dejavusans',
		'sk' => 'dejavusans',
		'ka' => 'dejavusans',
		'he' => 'dejavusans',
		'lo' => 'dejavusans',
		'lt' => 'dejavusans',
		'lv' => 'dejavusans',
		'tr' => 'dejavusans',
		'ko' => 'cid0kr',
		'zh' => 'cid0cs',
		'tw' => 'cid0cs',
		'th' => 'freeserif'
	);

	/**
	 * @param bool $use_cache
	 * @param string $orientation
	 */
	public function __construct($use_cache = false, $orientation = 'P')
	{
		parent::__construct($orientation, 'mm', 'A4', true, 'UTF-8', $use_cache, false);
		$this->setRTL(Context::getContext()->language->is_rtl);
	}

	/**
	 * set the PDF encoding
	 *
	 * @param string $encoding
	 */
	public function setEncoding($encoding)
	{
		$this->encoding = $encoding;
	}

	/**
	 *
	 * set the PDF header
	 *
	 * @param string $header HTML
	 */
	public function createHeader($header)
	{
		$this->header = $header;
	}

	/**
	 *
	 * set the PDF footer
	 *
	 * @param string $footer HTML
	 */
	public function createFooter($footer)
	{
		$this->footer = $footer;
	}

	/**
	 *
	 * create the PDF content
	 *
	 * @param string $content HTML
	 */
	public function createContent($content)
	{
		$this->content = $content;
	}

	/**
	 * Change the font
	 *
	 * @param string $iso_lang
	 */
	public function setFontForLang($iso_lang)
	{
		$this->font = PDFGenerator::DEFAULT_FONT;
		if (array_key_exists($iso_lang, $this->font_by_lang))
			$this->font = $this->font_by_lang[$iso_lang];

		$this->setHeaderFont(array($this->font, '', PDF_FONT_SIZE_MAIN));
		$this->setFooterFont(array($this->font, '', PDF_FONT_SIZE_MAIN));

		$this->setFont($this->font);
	}

	/**
	 * @see TCPDF::Header()
	 */
	public function Header()
	{
		$this->writeHTML($this->header);
	}

	/**
	 * @see TCPDF::Footer()
	 */
	public function Footer()
	{
		$this->writeHTML($this->footer);
	}

	/**
	 * Render HTML template
	 * @param string $filename
	 * @param bool $display true:display to user, false:save, 'I','D','S' as fpdf display
	 * @throws PrestaShopException
	 *
	 * @return string HTML rendered
	 */
	public function render($filename, $display = true)
	{
		if (empty($filename))
			throw new PrestaShopException('Missing filename.');

		$this->lastPage();

		if ($display === true)
			$output = 'D';
		elseif ($display === false)
			$output = 'S';
		elseif ($display == 'D')
			$output = 'D';
		elseif ($display == 'S')
			$output = 'S';
		elseif ($display == 'F')
			$output = 'F';
		else
			$output = 'I';

		return $this->output($filename, $output);
	}

	/**
	 * Write a PDF page
	 */
	public function writePage()
	{
		$this->SetHeaderMargin(5);
		$this->SetFooterMargin(18);
		$this->setMargins(10, 40, 10);
		$this->AddPage();
		$this->writeHTML($this->content, true, false, true, false, '');
	}

	/**
	 * Override of TCPDF::getRandomSeed() - getmypid() is blocked on several hosting
	*/
	protected function getRandomSeed($seed = '')
	{
		$seed .= microtime();

		if (function_exists('openssl_random_pseudo_bytes') && (strtoupper(substr(PHP_OS, 0, 3)) !== 'WIN'))
		{
			// this is not used on windows systems because it is very slow for a know bug
			$seed .= openssl_random_pseudo_bytes(512);
		}
		else
			for ($i = 0; $i < 23; ++$i)
				$seed .= uniqid('', true);

		$seed .= uniqid('', true);
		$seed .= rand();
		$seed .= __FILE__;
		$seed .= $this->bufferlen;

		if (isset($_SERVER['REMOTE_ADDR']))
			$seed .= $_SERVER['REMOTE_ADDR'];
		if (isset($_SERVER['HTTP_USER_AGENT']))
			$seed .= $_SERVER['HTTP_USER_AGENT'];
		if (isset($_SERVER['HTTP_ACCEPT']))
			$seed .= $_SERVER['HTTP_ACCEPT'];
		if (isset($_SERVER['HTTP_ACCEPT_ENCODING']))
			$seed .= $_SERVER['HTTP_ACCEPT_ENCODING'];
		if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE']))
			$seed .= $_SERVER['HTTP_ACCEPT_LANGUAGE'];
		if (isset($_SERVER['HTTP_ACCEPT_CHARSET']))
			$seed .= $_SERVER['HTTP_ACCEPT_CHARSET'];

		$seed .= rand();
		$seed .= uniqid('', true);
		$seed .= microtime();

		return $seed;
	}
}
