<?php
/*
* 2007-2011 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  2007-2011 PrestaShop SA
*  @version  Release: $Revision: 9526 $
*  @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
*  International Registered Trademark & Property of PrestaShop SA
*/

include_once(PS_ADMIN_DIR.'/tabs/AdminPreferences.php');

class AdminThemes extends AdminPreferences
{
	/** This value is used in isThemeCompatible method. only version node with an 
	 * higher version number will be used in [theme]/config.xml
	 * @since 1.4.0.11, check theme compatibility 1.4
	 * @static
		*/
	public static $check_features_version = '1.4';
	
	/** $check_features is a multidimensional array used to check [theme]/config.xml values, 
	 * and also checks prestashop current configuration if not match.
	 * @static
	 */
	public static $check_features = array(
		'ccc' => array( // feature key name
			'attributes' => array(
				'available' => array( 
					'value' => 'true', // accepted attribute value
					// if value doesnt match, 
					// prestashop configuration value must have thoses values
					'check_if_not_valid' => array( 
						'PS_CSS_THEME_CACHE' => 0,
						'PS_JS_THEME_CACHE' => 0,
						'PS_HTML_THEME_COMPRESSION' => 0,
						'PS_JS_HTML_THEME_COMPRESSION' => 0,
						'PS_HIGH_HTML_THEME_COMPRESSION' => 0,
					),
				),
			),
			'error' => 'This theme may not correctly use "combine, compress and cache"',
			'tab' => 'AdminPerformance',
		),
		'guest_checkout' => array(
			'attributes' => array(
				'available' => array(
				'value' => 'true',
				'check_if_not_valid' => array('PS_GUEST_CHECKOUT_ENABLED' => 0)
				),
			), 
			'error' => 'This theme may not correctly use "guest checkout"',
			'tab' => 'AdminPreferences',
		),
		'one_page_checkout' => array(
			'attributes' => array(
				'available' => array(
					'value' => 'true',
					'check_if_not_valid' => array('PS_ORDER_PROCESS_TYPE' => 0),
				),
			),
			'error' => 'This theme may not correctly use "one page checkout"',
			'tab' => 'AdminPreferences',
		),
		'store_locator' => array(
			'attributes' => array(
				'available' => array(
				'value' => 'true',
				'check_if_not_valid' => array('PS_STORES_SIMPLIFIED' => 0,'PS_STORES_DISPLAY_FOOTER' => 0),
				)
			),
			'error' => 'This theme may not correctly use "display store location"',
			'tab' => 'AdminStores',
		)
	);

	public function __construct()
	{
		$this->className = 'Configuration';
		$this->table = 'configuration';

 		$this->_fieldsAppearance = array(
			'PS_LOGO' => array('title' => $this->l('Header logo:'), 'desc' => $this->l('Will appear on main page'), 'type' => 'file', 'thumb' => array('file' => _PS_IMG_.'logo.jpg?date='.time(), 'pos' => 'before')),
			'PS_LOGO_MAIL' => array('title' => $this->l('Mail logo:'), 'desc' => $this->l('Will appear on e-mail headers, if undefined the Header logo will be used'), 'type' => 'file', 'thumb' => array('file' => ((file_exists(_PS_IMG_DIR_.'logo_mail.jpg')) ? _PS_IMG_.'logo_mail.jpg?date='.time() : _PS_IMG_.'logo.jpg?date='.time()), 'pos' => 'before')),
			'PS_LOGO_INVOICE' => array('title' => $this->l('Invoice logo:'), 'desc' => $this->l('Will appear on invoices headers, if undefined the Header logo will be used'), 'type' => 'file', 'thumb' => array('file' => (file_exists(_PS_IMG_DIR_.'logo_invoice.jpg') ? _PS_IMG_.'logo_invoice.jpg?date='.time() : _PS_IMG_.'logo.jpg?date='.time()), 'pos' => 'before')),
			'PS_FAVICON' => array('title' => $this->l('Favicon:'), 'desc' => $this->l('Will appear in the address bar of your web browser'), 'type' => 'file', 'thumb' => array('file' => _PS_IMG_.'favicon.ico?date='.time(), 'pos' => 'after')),
			'PS_STORES_ICON' => array('title' => $this->l('Store icon:'), 'desc' => $this->l('Will appear on the store locator (inside Google Maps)').'<br />'.$this->l('Suggested size: 30x30, Transparent GIF'), 'type' => 'file', 'thumb' => array('file' => _PS_IMG_.'logo_stores.gif?date='.time(), 'pos' => 'before')),
			'PS_NAVIGATION_PIPE' => array('title' => $this->l('Navigation pipe:'), 'desc' => $this->l('Used for navigation path inside categories/product'), 'cast' => 'strval', 'type' => 'text', 'size' => 20),
		);
		$this->_fieldsTheme = array(
			'PS_THEME' => array('title' => $this->l('Theme'), 'validation' => 'isGenericName', 'type' => 'image', 'list' => $this->_getThemesList(), 'max' => 3)
		);
		parent::__construct();
	}

	public function display()
	{
		global $currentIndex;
		
		/* PrestaShop demo mode */
		if (_PS_MODE_DEMO_)
			$this->_errors[] = Tools::displayError('This functionnality has been disabled.');
		/* PrestaShop demo mode*/
		
		if (file_exists(_PS_IMG_DIR_.'logo.jpg'))
		{
			list($width, $height, $type, $attr) = getimagesize(_PS_IMG_DIR_.'logo.jpg');
			Configuration::updateValue('SHOP_LOGO_WIDTH', (int)round($width));
			Configuration::updateValue('SHOP_LOGO_HEIGHT', (int)round($height));
		}
		// No cache for auto-refresh uploaded logo
		header('Cache-Control: no-cache, must-revalidate');
		header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
		$this->_displayForm('appearance', $this->_fieldsAppearance, $this->l('Appearance'), 'width3', 'appearance');
		echo '<br /><br />';
		$this->_displayForm('themes', $this->_fieldsTheme, $this->l('Themes'), 'width3', 'themes');
		echo '<br /><br />';
	}
	
	/**
	  * Return an array with themes and thumbnails
	  *
	  * @return array
	  */
	private function _getThemesList()
	{
		$dir = opendir(_PS_ALL_THEMES_DIR_);
		while ($folder = readdir($dir))
			if ($folder != '.' AND $folder != '..' AND is_dir(_PS_ALL_THEMES_DIR_.$folder) AND file_exists(_PS_ALL_THEMES_DIR_.'/'.$folder.'/preview.jpg'))
				$themes[$folder]['name'] = $folder;
		closedir($dir);	
		return isset($themes) ? $themes : array();
	}

	/** This function checks if the theme designer has thunk to make his theme compatible 1.4, 
	* and noticed it on the $theme_dir/config.xml file. If not, some new functionnalities has
	* to be desactivated
	*
	* @since 1.4
	* @param string $theme_dir theme directory
	* @return boolean Validity is ok or not
	*/
	private function _isThemeCompatible($theme_dir)
	{
		global $cookie;
		$all_errors='';
		$return=true;
		$check_version=AdminThemes::$check_features_version;

		if (!is_file(_PS_ALL_THEMES_DIR_ . $theme_dir . '/config.xml'))
		{
			$this->_errors[] = Tools::displayError('config.xml is missing in your theme path.').'<br/>';
			$xml=null;
		}
		else
		{
			$xml=@simplexml_load_file(_PS_ALL_THEMES_DIR_.$theme_dir.'/config.xml');
			if (!$xml)
			{
				$this->_errors[] = Tools::displayError('config.xml is not a valid xml file in your theme path.').'<br/>';
			}
		}
		// will be set to false if any version node in xml is correct
		$xml_version_too_old = true;

		// foreach version in xml file, 
		// node means feature, attributes has to match 
		// the corresponding value in AdminThemes::$check_features[feature] array
		$xmlArray = simpleXMLToArray($xml);
		foreach($xmlArray AS $version)
		{
			if (isset($version['value']) AND version_compare($version['value'], $check_version) >= 0)
			{
				$checkedFeature = array();
				foreach (AdminThemes::$check_features AS $codeFeature => $arrConfigToCheck)
					foreach ($arrConfigToCheck['attributes'] AS $attr => $v)
						if (!isset($version[$codeFeature]) OR !isset($version[$codeFeature][$attr]) OR $version[$codeFeature][$attr] != $v['value'])
							if (!$this->_checkConfigForFeatures($codeFeature, $attr)) // feature missing in config.xml file, or wrong attribute value
								$return = false;
				$xml_version_too_old = false;
			}
		}
		if ($xml_version_too_old AND !$this->_checkConfigForFeatures(array_keys(AdminThemes::$check_features)))
		{
			$this->_errors[] .= Tools::displayError('config.xml theme file has not been created for this version of prestashop.');
			$return = false;
		}
		return $return;
	}

	/**
	 * _checkConfigForFeatures
	 * 
	 * @param array $arrFeature array of feature code to check
	 * @param mixed $configItem will precise the attribute which not matches. If empty, will check every attributes
	 * @return error message, or null if disabled
	 */
	private function _checkConfigForFeatures($arrFeatures, $configItem = array())
	{
		$return = true;
		if (is_array($configItem))
		{
			foreach ($arrFeatures as $feature)
				if (!sizeof($configItem))
					$configItem = array_keys(AdminThemes::$check_features[$feature]['attributes']);
			foreach ($configItem as $attr)
			{
				$check = $this->_checkConfigForFeatures($arrFeatures,$attr);
				if ($check == false)
					$return = false;
			}
			return $return;
		}

		$return = true;
		if (!is_array($arrFeatures))
			$arrFeatures = array($arrFeatures);

		foreach ($arrFeatures as $feature)
		{
			$arrConfigToCheck = AdminThemes::$check_features[$feature]['attributes'][$configItem]['check_if_not_valid'];
			foreach ($arrConfigToCheck as $config_key => $config_val)
			{
				$config_get = Configuration::get($config_key);
				if ($config_get != $config_val)
				{
					$this->_errors[] = Tools::displayError(AdminThemes::$check_features[$feature]['error']).'.'
					.(!empty(AdminThemes::$check_features[$feature]['tab'])
						?' <a href="?tab='.AdminThemes::$check_features[$feature]['tab'].'&amp;token='
						.Tools::getAdminTokenLite(AdminThemes::$check_features[$feature]['tab']).'" ><u>'
						.Tools::displayError('You can disable this function on this page')
						.'</u></a>':''
					).'<br/>' ;
					$return = false;
					break; // break for this attributes
				}
			}
		}
		return $return;
	}

	/** this functions make checks about AdminThemes configuration edition only.
	 * 
	 * @since 1.4
	 */
	public function postProcess()
	{
		global $smarty;
		/* PrestaShop demo mode */
		if (_PS_MODE_DEMO_)
		{
			$this->_errors[] = Tools::displayError('This functionnality has been disabled.');
			return;
		}
		/* PrestaShop demo mode*/
		// new check compatibility theme feature (1.4) :
		$val = Tools::getValue('PS_THEME');
		Configuration::updateValue('PS_IMG_UPDATE_TIME', time());
		if (!empty($val) AND !$this->_isThemeCompatible($val)) // don't submit if errors
			unset($_POST['submitThemes'.$this->table]);
		Tools::clearCache($smarty);
		parent::postProcess();
	}
}