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<?php
/**
* wallabag, self hostable application allowing you to not miss any content anymore
*
* @category wallabag
* @author Nicolas Lœuillet <nicolas@loeuillet.org>
* @copyright 2013
* @license http://opensource.org/licenses/MIT see COPYING file
*/
class Template extends Twig_Environment
{
protected $wallabag;
private $canRenderTemplates = TRUE;
private $currentTheme = '';
public function __construct(Poche $wallabag)
{
$this->wallabag = $wallabag;
// Set up theme
$pocheUser = Session::getParam('poche_user');
$themeDirectory = (is_null($pocheUser) ? DEFAULT_THEME : $pocheUser->getConfigValue('theme'));
if ($themeDirectory === false) {
$themeDirectory = DEFAULT_THEME;
}
$this->currentTheme = $themeDirectory;
if ($this->_themeIsInstalled() === array()) {
$this->_init();
}
}
/**
* Returns true if selected theme is installed
*
* @return bool
*/
private function _themeIsInstalled()
{
$errors = array();
// Twig is an absolute requirement for wallabag to function.
// Abort immediately if the Composer installer hasn't been run yet
if (!$this->canRenderTemplates) {
$errors[] = 'Twig does not seem to be installed. Please initialize the Composer installation to automatically fetch dependencies. You can also download <a href="http://wllbg.org/vendor">vendor.zip</a> and extract it in your wallabag folder.';
}
// Check if the selected theme and its requirements are present
$theme = $this->getTheme();
if ($theme != '' && !is_dir(THEME . '/' . $theme)) {
$errors[] = 'The currently selected theme (' . $theme . ') does not seem to be properly installed (Missing directory: ' . THEME . '/' . $theme . ')';
$this->canRenderTemplates = FALSE;
}
$themeInfo = $this->getThemeInfo($theme);
if (isset($themeInfo['requirements']) && is_array($themeInfo['requirements'])) {
foreach ($themeInfo['requirements'] as $requiredTheme) {
if (! is_dir(THEME . '/' . $requiredTheme)) {
$errors[] = 'The required "' . $requiredTheme . '" theme is missing for the current theme (' . $theme . ')';
$this->canRenderTemplates = FALSE;
}
}
}
$currentErrors = (is_null(Session::getParam('errors'))? array() : Session::getParam('errors'));
Session::setParam('errors', array_merge($errors, $currentErrors));
return $errors;
}
/**
* Initialization for templates
*/
private function _init()
{
$loaderChain = new Twig_Loader_Chain();
$theme = $this->getTheme();
// add the current theme as first to the loader chain
// so Twig will look there first for overridden template files
try {
$loaderChain->addLoader(new Twig_Loader_Filesystem(THEME . '/' . $theme));
} catch (Twig_Error_Loader $e) {
# @todo isInstalled() should catch this, inject Twig later
die('The currently selected theme (' . $theme . ') does not seem to be properly installed (' . THEME . '/' . $theme .' is missing)');
}
// add all required themes to the loader chain
$themeInfo = $this->getThemeInfo($theme);
if (isset($themeInfo['requirements']) && is_array($themeInfo['requirements'])) {
foreach ($themeInfo['requirements'] as $requiredTheme) {
try {
$loaderChain->addLoader(new Twig_Loader_Filesystem(THEME . '/' . $requiredTheme));
} catch (Twig_Error_Loader $e) {
# @todo isInstalled() should catch this, inject Twig later
die('The required "' . $requiredTheme . '" theme is missing for the current theme (' . $theme . ')');
}
}
}
if (DEBUG_POCHE) {
$twigParams = array();
} else {
$twigParams = array('cache' => CACHE);
}
parent::__construct($loaderChain, $twigParams);
//$tpl = new Twig_Environment($loaderChain, $twigParams);
$this->addExtension(new Twig_Extensions_Extension_I18n());
# filter to display domain name of an url
$filter = new Twig_SimpleFilter('getDomain', 'Tools::getDomain');
$this->addFilter($filter);
# filter for reading time
$filter = new Twig_SimpleFilter('getReadingTime', 'Tools::getReadingTime');
$this->addFilter($filter);
}
/**
* Returns current theme
*
* @return string
*/
public function getTheme()
{
return $this->currentTheme;
}
/**
* Provides theme information by parsing theme.ini file if present in the theme's root directory.
* In all cases, the following data will be returned:
* - name: theme's name, or key if the theme is unnamed,
* - current: boolean informing if the theme is the current user theme.
*
* @param string $theme Theme key (directory name)
* @return array|boolean Theme information, or false if the theme doesn't exist.
*/
public function getThemeInfo($theme)
{
if (!is_dir(THEME . '/' . $theme)) {
return false;
}
$themeIniFile = THEME . '/' . $theme . '/theme.ini';
$themeInfo = array();
if (is_file($themeIniFile) && is_readable($themeIniFile)) {
$themeInfo = parse_ini_file($themeIniFile);
}
if ($themeInfo === false) {
$themeInfo = array();
}
if (!isset($themeInfo['name'])) {
$themeInfo['name'] = $theme;
}
$themeInfo['current'] = ($theme === $this->getTheme());
return $themeInfo;
}
/**
* Returns an array with installed themes
*
* @return array
*/
public function getInstalledThemes()
{
$handle = opendir(THEME);
$themes = array();
while (($theme = readdir($handle)) !== false) {
# Themes are stored in a directory, so all directory names are themes
# @todo move theme installation data to database
if (!is_dir(THEME . '/' . $theme) || in_array($theme, array('.', '..'))) {
continue;
}
$themes[$theme] = $this->getThemeInfo($theme);
}
ksort($themes);
return $themes;
}
/**
* Update theme for the current user
*
* @param $newTheme
*/
public function updateTheme($newTheme)
{
# we are not going to change it to the current theme...
if ($newTheme == $this->getTheme()) {
$this->wallabag->messages->add('w', _('still using the "' . $this->getTheme() . '" theme!'));
Tools::redirect('?view=config');
}
$themes = $this->getInstalledThemes();
$actualTheme = false;
foreach (array_keys($themes) as $theme) {
if ($theme == $newTheme) {
$actualTheme = true;
break;
}
}
if (!$actualTheme) {
$this->wallabag->messages->add('e', _('that theme does not seem to be installed'));
Tools::redirect('?view=config');
}
$this->wallabag->store->updateUserConfig($this->wallabag->user->getId(), 'theme', $newTheme);
$this->wallabag->messages->add('s', _('you have changed your theme preferences'));
$currentConfig = $_SESSION['poche_user']->config;
$currentConfig['theme'] = $newTheme;
$_SESSION['poche_user']->setConfig($currentConfig);
Tools::emptyCache();
Tools::redirect('?view=config');
}
}
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