<?php
/**
 * eGroupWare: About informations
 *
 * rewrite of the old PHPLib based about page
 * it now uses eTemplate
 *
 * This is NO typical eTemplate application as it is not stored in the
 * correct namespace
 *
 * LICENSE:  GPL.
 *
 * @package     api
 * @subpackage  about
 * @author      Sebastian Ebling <hudeldudel@php.net>
 * @author      Ralf Becker <RalfBecker@outdoor-training.de>
 * @license     http://www.gnu.org/copyleft/gpl.html
 * @link        http://www.egroupware.org
 * @version     SVN: $Id$
 */

/**
 * Shows informations about eGroupWare
 *  - general information
 *  - installed applications
 *  - installed templates
 *  - installed languages
 *
 * Usage:
 * <code>
 *  $aboutPage = new about();
 * </code>
 * The constuctor will do all
 *
 * There is no typical so, bo ui structure, this class is all in one
 *
 * @since		1.4
 */
class about
{
	/**
	 * constructor of about class
	 * decides to show tab- or detail view
	 *
	 * @since	1.4
	 */
	function about()
	{
		// list or detail view
		$name = 'eGroupWare';
		$detail = false;
		$nonavbar = false;

		// application detail?
		if (isset($_GET['app']) && $_GET['app'] != 'eGroupWare') {
			$name = basename($_GET['app']);
			$type = 'application';
			$detail = true;
		}

		// template detail?
		if (isset($_GET['template']) && $_GET['template'] != 'eGroupWare') {
			$name = basename($_GET['template']);
			$type = 'template';
			$detail = true;
		}

		// navbar or not
		if (isset($_GET['nonavbar'])) {
			$nonavbar = $_GET['nonavbar'];
		}


		if ($detail) {
			$this->_detailView($name, $type, $nonavbar);
		} else {
			$this->_listView();
		}
	}


	/**
	 * output of list view
	 * collects data and shows a tabbed view that lists
	 *  - general informations
	 *  - installed applications
	 *  - installed templates
	 *  - installed languages
	 *
	 * @return nothing
	 *
	 * @access  private
	 * @since	1.4
	 */
	function _listView()
	{
		// get informations about the applications
		$apps = array();
		$apps[] = ''; // first empty row for eTemplate
		foreach (isset($GLOBALS['egw_info']['user']['apps']['admin']) ?
			$GLOBALS['egw_info']['apps'] : $GLOBALS['egw_info']['user']['apps'] as $app => $appinfo)
		{
			$info = $this->_getParsedAppInfo($app);
			$apps[] = array(
				'appImage'		=> '<img src="'.$info['image'].'" />',
				'appName'		=> $appinfo['title'],
				'appAuthor' 	=> $info['author'],
				'appMaintainer'	=> $info['maintainer'],
				'appVersion'	=> $info['version'],
				'appLicense'	=> $this->_linkLicense($info['license']),
				'appDetails'	=> '<a href="'.$GLOBALS['egw_info']['server']['webserver_url'].'/about.php?app='.$app.'&nonavbar=true" onclick="egw_openWindowCentered2(this.href,this.target,750,410,'."'yes'".'); return false;"><img src="'.$GLOBALS['egw']->common->image('phpgwapi','view.png').'" /></a>'
				);
		}

		// get informations about the templates
		$templates = array();
		$templates[] = ''; // first empty row for eTemplate
		foreach($GLOBALS['egw']->common->list_templates() as $template => $templateinfo) {
			$info = $this->_getParsedTemplateInfo($template);
			$templates[] = array(
				'templateImage'		=> '<img src="'.$info['image'].'" />',
				'templateName'		=> $templateinfo['name'],
				'templateAuthor'	=> $info['author'],
				'templateMaintainer'=> $info['maintainer'],
				'templateVersion'	=> $info['version'],
				'templateLicense'	=> $this->_linkLicense($info['license']),
				'templateDetails'	=> '<a href="'.$GLOBALS['egw_info']['server']['webserver_url'].'/about.php?template='.$template.'&nonavbar=true" onclick="egw_openWindowCentered2(this.href,this.target,750,410,'."'yes'".'); return false;"><img src="'.$GLOBALS['egw']->common->image('phpgwapi','view.png').'" /></a>'
				);
		}

		// get informations about installed languages
		$translations = array();
		$translations[] = ''; // first empty row for eTemplate
		$langs = $GLOBALS['egw']->translation->get_installed_langs();
		foreach($GLOBALS['egw']->translation->get_installed_langs() as $translation => $translationinfo) {
			$translations[] = array(
				'langName'	=>	$translationinfo.' ('.$translation.')'
				);
		}


		// fill content array for eTemplate
		$content = array(
			'apiVersion'	=> '<p>'.lang('eGroupWare API version').' '.$GLOBALS['egw_info']['server']['versions']['phpgwapi'].'</p>',
			'applications'	=> $apps,
			'templates'		=> $templates,
			'translations'	=> $translations
			);

		$tmpl =& CreateObject('etemplate.etemplate', 'phpgwapi.about.index');
		$tmpl->exec('phpgwapi.about.index', $content);
	}


	/**
	 * output of detail view for applications or templates
	 *
	 * @param	string	$name		application/template name
	 * @param	string	$type		can be 'application' or 'template'	:default $type='application'
	 * @param	string	$nonavbar 	don't show navbar	:default $nonavbar=false
	 * @return	nothing
	 *
	 * @access	private
	 * @since	1.4
	 */
	function _detailView($name, $type='application', $nonavbar=false)
	{
		// get the informations
		switch ($type) {
			case 'application':
				$info = $this->_getParsedAppInfo($name);
				break;
			case 'template':
				$info = $this->_getParsedTemplateInfo($name);
				break;
		}

		// app names are translated, template names not...
		if ($type == 'application') {
			$translatedName = lang($name);
		} else {
			$translatedName = $name;
		}

		// fill content array
		$content = array(
			'image'			=> '<img src="'.$info['image'].'" />',
			'name'			=> '<h2>'.$translatedName.'</h2>',
			'description'	=> '<p>'.$info['description'].'</p>',
			'note'			=> $info['note'],
			'author'		=> $info['author'],
			'maintainer'	=> $info['maintainer'],
			'version'		=> $info['version'],
			'license'		=> $this->_linkLicense($info['license'])
			);

		$tmpl =& CreateObject('etemplate.etemplate', 'phpgwapi.about.detail');
		if ($nonavbar) {
			$tmpl->exec('phpgwapi.about.detail', $content, array(), array(), array(), 2);
		} else {
			$GLOBALS['egw_info']['flags']['app_header'] = lang('About %1', $translatedName);
			$tmpl->exec('phpgwapi.about.detail', $content);
		}
	}


	/**
	 * parse template informations from setup.inc.php file
	 *
	 * @param   string  $template	template template name
	 * @return  array   html formated informations about author(s),
	 *                  maintainer(s), version, license of the
	 *                  given application
	 *
	 * @access  private
	 * @since   1.4
	 */
	function _getParsedTemplateInfo($template)
	{
		// define the return array
		$ret = array(
		'image'			=> (file_exists($GLOBALS['egw_info']['template'][$template]['icon'])) ? $GLOBALS['egw_info']['template'][$template]['icon'] : $GLOBALS['egw']->common->image('thisdoesnotexist',array('navbar','nonav')),
			'author'        => '',
			'maintainer'    => '',
			'version'       => '',
			'license'       => '',
			'description'	=> '',
			'note'			=> ''
		);

		if (!file_exists(EGW_INCLUDE_ROOT . "/phpgwapi/templates/$template/setup/setup.inc.php")) {
			return $ret;
		}

		include(EGW_INCLUDE_ROOT . "/phpgwapi/templates/$template/setup/setup.inc.php");

		$ret['author'] = $this->_getHtmlPersonalInfo($GLOBALS['egw_info']['template'][$template], 'author');
		$ret['maintainer'] = $this->_getHtmlPersonalInfo($GLOBALS['egw_info']['template'][$template], 'maintainer');
		$ret['version'] = $GLOBALS['egw_info']['template'][$template]['version'];
		$ret['license'] = $GLOBALS['egw_info']['template'][$template]['license'];
		$ret['description'] = $GLOBALS['egw_info']['template'][$template]['description'];
		$ret['note'] = $GLOBALS['egw_info']['template'][$template]['note'];

		return $ret;
	}


	/**
	 * parse application informations from setup.inc.php file
	 *
	 * @param	string	$app	application name
	 * @return	array	html formated informations about author(s),
	 *					maintainer(s), version, license of the
	 *					given application
	 *
	 * @access  private
	 * @since   1.4
	 */
	function _getParsedAppInfo($app)
	{
		// we read all setup files once, as no every app has it's own file
		static $setup_info;
		if (is_null($setup_info))
		{
			foreach($GLOBALS['egw_info']['apps'] as $_app => $_data)
			{
				if (file_exists($file = EGW_INCLUDE_ROOT.'/'.$_app.'/setup/setup.inc.php'))
				{
					include($file);
				}
			}
		}
		$app_info  = $GLOBALS['egw_info']['apps'][$app];

		// define the return array
		$ret = array(
			'image'			=> $GLOBALS['egw']->common->image(isset($app_info['icon_app'])?$app_info['icon_app']:$app,
				isset($app_info['icon'])?$app_info['icon']:array('navbar','nonav')),
			'author'		=> '',
			'maintainer'	=> '',
			'version'		=> $app_info['version'],
			'license'		=> '',
			'description'	=> '',
			'note'			=> ''
		);

		if (isset($setup_info[$app]))
		{
			$ret['author'] = $this->_getHtmlPersonalInfo($setup_info[$app], 'author');
			$ret['maintainer'] = $this->_getHtmlPersonalInfo($setup_info[$app], 'maintainer');
			if ($app_info['version'] != $setup_info[$app]['version']) $ret['version'] .= ' ('.$setup_info[$app]['version'].')';
			$ret['license'] = $setup_info[$app]['license'];
			$ret['description'] = $setup_info[$app]['description'];
			$ret['note'] = $setup_info[$app]['note'];
		}
		return $ret;
	}


	/**
	 * helper to parse author and maintainer info from setup_info array
	 *
	 * @param	array	$setup_info	setup_info[$app] array
	 *								($GLOBALS['egw_info']['template'][$template] array for template informations)
	 * @param	string	$f			'author' or 'maintainer', default='author'
	 * @return	string	html formated informations about author/maintainer
	 *
	 * @access  private
	 * @since   1.4
	 */
	function _getHtmlPersonalInfo($setup_info, $f = 'author')
	{
		$authors = array();
			// get the author(s)
			if ($setup_info[$f]) {
				// author is set
				if (!is_array($setup_info[$f])) {
						// author is no array
						$authors[0]['name'] = $setup_info[$f];
						if ($setup_info[$f.'_email']) {
							$authors[0]['email'] = $setup_info[$f.'_email'];
						}
						if ($setup_info[$f.'_url']) {
							$authors[0]['url'] = $setup_info[$f.'_url'];
						}

				} else {
						// author is array
						if ($setup_info[$f]['name']) {
							// only one author
							$authors[0]['name'] = $setup_info[$f]['name'];
							if ($setup_info[$f]['email']) {
								$authors[0]['email'] = $setup_info[$f]['email'];
							}
							if ($setup_info[$f]['url']) {
								$authors[0]['url'] = $setup_info[$f]['url'];
							}
						} else {
							// may be more authors
							foreach ($setup_info[$f] as $number => $values) {
								if ($setup_info[$f][$number]['name']) {
										$authors[$number]['name'] = $setup_info[$f][$number]['name'];
								}
								if ($setup_info[$f][$number]['email']) {
										$authors[$number]['email'] = $setup_info[$f][$number]['email'];
								}
								if ($setup_info[$f][$number]['url']) {
										$authors[$number]['url'] = $setup_info[$f][$number]['url'];
								}
							}
						}
				}
			}

		// html format authors
		$s = '';
		foreach ($authors as $author) {
			if ($s != '') {
					$s .= '<br />';
			}
			$s .= lang('name').': '.$author['name'];
			if ($author['email']) {
					$s .= '<br />'.lang('email').': <a href="mailto:'.$author['email'].'">'.$author['email'].'</a>';
			}
			if ($author['url']) {
					$s .= '<br />'.lang('url').': <a href="'.$author['url'].'" target="_blank">'.$author['url'].'</a>';
			}
		}
		return $s;
	}


	/**
	 * surround license string with link to license if it is known
	 *
	 * @param   string  $license	the license to surround with link
	 * @return  string  linked licence if known, $licence if not known
	 *
	 * @access  private
	 * @since   1.4
	 */
	function _linkLicense($license)
	{
		// toupper known licenses
		$knownLicenses = array(
			'GPL'	=> 'http://opensource.org/licenses/gpl-2.0.php',
			'LGPL'	=> 'http://opensource.org/licenses/lgpl-2.1.php',
			'GPL3'	=> 'http://opensource.org/licenses/gpl-3.0.php',
			'LGPL3'	=> 'http://opensource.org/licenses/lgpl-3.0.php',
			'PHP'   => 'http://opensource.org/licenses/php.php',
		);

		$name = is_array($license) ? $license['name'] : $license;
		$url = is_array($license) && isset($license['url']) ? $license['url'] : '';

		if (!$url && isset($knownLicenses[strtoupper($name)]))
		{
			$url = $knownLicenses[$name=strtoupper($name)];
		}

		return !$url ? $name : '<a href="'.htmlspecialchars($url).'" target="_blank">'.htmlspecialchars($name).'</a>';
	}
}