inc/poche/Poche.class.php

   1 <?php
   2 /**
   3  * poche, a read it later open source system
   4  *
   5  * @category   poche
   6  * @author     Nicolas Lœuillet <support@inthepoche.com>
   7  * @copyright  2013
   8  * @license    http://www.wtfpl.net/ see COPYING file
   9  */
  10
  11 class Poche
  12 {
  13     public static $canRenderTemplates = true;
  14     public static $configFileAvailable = true;
  15
  16     public $user;
  17     public $store;
  18     public $tpl;
  19     public $messages;
  20     public $pagination;
  21
  22     private $currentTheme = '';
  23     private $notInstalledMessage = '';
  24
  25     # @todo make this dynamic (actually install themes and save them in the database including author information et cetera)
  26     private $installedThemes = array(
  27         'default' => array('requires' => array()),
  28         'dark' => array('requires' => array('default')),
  29         'dmagenta' => array('requires' => array('default')),
  30         'solarized' => array('requires' => array('default')),
  31         'solarized-dark' => array('requires' => array('default'))
  32     );
  33
  34     public function __construct()
  35     {
  36         if (! $this->configFileIsAvailable()) {
  37             return;
  38         }
  39
  40         $this->init();
  41
  42         if (! $this->themeIsInstalled()) {
  43             return;
  44         }
  45
  46         $this->initTpl();
  47
  48         if (! $this->systemIsInstalled()) {
  49             return;
  50         }
  51
  52         $this->store = new Database();
  53         $this->messages = new Messages();
  54
  55         # installation
  56         if (! $this->store->isInstalled()) {
  57             $this->install();
  58         }
  59     }
  60
  61     private function init()
  62     {
  63         Tools::initPhp();
  64         Session::$sessionName = 'poche';
  65         Session::init();
  66
  67         if (isset($_SESSION['poche_user']) && $_SESSION['poche_user'] != array()) {
  68             $this->user = $_SESSION['poche_user'];
  69         } else {
  70             # fake user, just for install & login screens
  71             $this->user = new User();
  72             $this->user->setConfig($this->getDefaultConfig());
  73         }
  74
  75         # l10n
  76         $language = $this->user->getConfigValue('language');
  77         putenv('LC_ALL=' . $language);
  78         setlocale(LC_ALL, $language);
  79         bindtextdomain($language, LOCALE);
  80         textdomain($language);
  81
  82         # Pagination
  83         $this->pagination = new Paginator($this->user->getConfigValue('pager'), 'p');
  84
  85         # Set up theme
  86         $themeDirectory = $this->user->getConfigValue('theme');
  87
  88         if ($themeDirectory === false) {
  89             $themeDirectory = DEFAULT_THEME;
  90         }
  91
  92         $this->currentTheme = $themeDirectory;
  93     }
  94
  95     public function configFileIsAvailable() {
  96         if (! self::$configFileAvailable) {
  97             $this->notInstalledMessage = 'You have to rename <strong>inc/poche/config.inc.php.new</strong> to <strong>inc/poche/config.inc.php</strong>.';
  98
  99             return false;
 100         }
 101
 102         return true;
 103     }
 104
 105     public function themeIsInstalled() {
 106         # Twig is an absolute requirement for Poche to function. Abort immediately if the Composer installer hasn't been run yet
 107         if (! self::$canRenderTemplates) {
 108             $this->notInstalledMessage = 'Twig does not seem to be installed. Please initialize the Composer installation to automatically fetch dependencies. Have a look at <a href="http://inthepoche.com/?pages/Documentation">the documentation.</a>';
 109
 110             return false;
 111         }
 112
 113         if (! is_writable(CACHE)) {
 114             $this->notInstalledMessage = '<h1>error</h1><p>You don\'t have write access on cache directory.</p>';
 115
 116             self::$canRenderTemplates = false;
 117
 118             return false;
 119         }
 120
 121         # Check if the selected theme and its requirements are present
 122         if (! is_dir(THEME . '/' . $this->getTheme())) {
 123             $this->notInstalledMessage = 'The currently selected theme (' . $this->getTheme() . ') does not seem to be properly installed (Missing directory: ' . THEME . '/' . $this->getTheme() . ')';
 124
 125             self::$canRenderTemplates = false;
 126
 127             return false;
 128         }
 129
 130         foreach ($this->installedThemes[$this->getTheme()]['requires'] as $requiredTheme) {
 131             if (! is_dir(THEME . '/' . $requiredTheme)) {
 132                 $this->notInstalledMessage = 'The required "' . $requiredTheme . '" theme is missing for the current theme (' . $this->getTheme() . ')';
 133
 134                 self::$canRenderTemplates = false;
 135
 136                 return false;
 137             }
 138         }
 139
 140         return true;
 141     }
 142
 143     /**
 144      * all checks before installation.
 145      * @todo move HTML to template
 146      * @return boolean
 147      */
 148     public function systemIsInstalled()
 149     {
 150         $msg = '';
 151
 152         $configSalt = defined('SALT') ? constant('SALT') : '';
 153
 154         if (empty($configSalt)) {
 155             $msg = '<h1>error</h1><p>You have not yet filled in the SALT value in the config.inc.php file.</p>';
 156         } else if (STORAGE == 'sqlite' && ! file_exists(STORAGE_SQLITE)) {
 157             Tools::logm('sqlite file doesn\'t exist');
 158             $msg = '<h1>error</h1><p>sqlite file doesn\'t exist, you can find it in install folder. Copy it in /db folder.</p>';
 159         } else if (is_dir(ROOT . '/install') && ! DEBUG_POCHE) {
 160             $msg = '<h1>install folder</h1><p>you have to delete the /install folder before using poche.</p>';
 161         } else if (STORAGE == 'sqlite' && ! is_writable(STORAGE_SQLITE)) {
 162             Tools::logm('you don\'t have write access on sqlite file');
 163             $msg = '<h1>error</h1><p>You don\'t have write access on sqlite file.</p>';
 164         }
 165
 166         if (! empty($msg)) {
 167             $this->notInstalledMessage = $msg;
 168
 169             return false;
 170         }
 171
 172         return true;
 173     }
 174
 175     public function getNotInstalledMessage() {
 176         return $this->notInstalledMessage;
 177     }
 178
 179     private function initTpl()
 180     {
 181         $loaderChain = new Twig_Loader_Chain();
 182
 183         # add the current theme as first to the loader chain so Twig will look there first for overridden template files
 184         try {
 185             $loaderChain->addLoader(new Twig_Loader_Filesystem(THEME . '/' . $this->getTheme()));
 186         } catch (Twig_Error_Loader $e) {
 187             # @todo isInstalled() should catch this, inject Twig later
 188             die('The currently selected theme (' . $this->getTheme() . ') does not seem to be properly installed (' . THEME . '/' . $this->getTheme() .' is missing)');
 189         }
 190
 191         # add all required themes to the loader chain
 192         foreach ($this->installedThemes[$this->getTheme()]['requires'] as $requiredTheme) {
 193             try {
 194                 $loaderChain->addLoader(new Twig_Loader_Filesystem(THEME . '/' . DEFAULT_THEME));
 195             } catch (Twig_Error_Loader $e) {
 196                 # @todo isInstalled() should catch this, inject Twig later
 197                 die('The required "' . $requiredTheme . '" theme is missing for the current theme (' . $this->getTheme() . ')');
 198             }
 199         }
 200
 201         if (DEBUG_POCHE) {
 202             $twig_params = array();
 203         } else {
 204             $twig_params = array('cache' => CACHE);
 205         }
 206
 207         $this->tpl = new Twig_Environment($loaderChain, $twig_params);
 208         $this->tpl->addExtension(new Twig_Extensions_Extension_I18n());
 209
 210         # filter to display domain name of an url
 211         $filter = new Twig_SimpleFilter('getDomain', 'Tools::getDomain');
 212         $this->tpl->addFilter($filter);
 213
 214         # filter for reading time
 215         $filter = new Twig_SimpleFilter('getReadingTime', 'Tools::getReadingTime');
 216         $this->tpl->addFilter($filter);
 217
 218         # filter for simple filenames in config view
 219         $filter = new Twig_SimpleFilter('getPrettyFilename', function($string) { return str_replace(ROOT, '', $string); });
 220         $this->tpl->addFilter($filter);
 221     }
 222
 223     private function install()
 224     {
 225         Tools::logm('poche still not installed');
 226         echo $this->tpl->render('install.twig', array(
 227             'token' => Session::getToken(),
 228             'theme' => $this->getTheme(),
 229             'poche_url' => Tools::getPocheUrl()
 230         ));
 231         if (isset($_GET['install'])) {
 232             if (($_POST['password'] == $_POST['password_repeat'])
 233                 && $_POST['password'] != "" && $_POST['login'] != "") {
 234                 # let's rock, install poche baby !
 235                 if ($this->store->install($_POST['login'], Tools::encodeString($_POST['password'] . $_POST['login'])))
 236                 {
 237                     Session::logout();
 238                     Tools::logm('poche is now installed');
 239                     Tools::redirect();
 240                 }
 241             }
 242             else {
 243                 Tools::logm('error during installation');
 244                 Tools::redirect();
 245             }
 246         }
 247         exit();
 248     }
 249
 250     public function getTheme() {
 251         return $this->currentTheme;
 252     }
 253
 254     public function getInstalledThemes() {
 255         $handle = opendir(THEME);
 256         $themes = array();
 257
 258         while (($theme = readdir($handle)) !== false) {
 259             # Themes are stored in a directory, so all directory names are themes
 260             # @todo move theme installation data to database
 261             if (! is_dir(THEME . '/' . $theme) || in_array($theme, array('..', '.', '.git'))) {
 262                 continue;
 263             }
 264
 265             $current = false;
 266
 267             if ($theme === $this->getTheme()) {
 268                 $current = true;
 269             }
 270
 271             $themes[] = array('name' => $theme, 'current' => $current);
 272         }
 273
 274         return $themes;
 275     }
 276
 277     public function getDefaultConfig()
 278     {
 279         return array(
 280             'pager' => PAGINATION,
 281             'language' => LANG,
 282             'theme' => DEFAULT_THEME
 283         );
 284     }
 285
 286     /**
 287      * Call action (mark as fav, archive, delete, etc.)
 288      */
 289     public function action($action, Url $url, $id = 0, $import = FALSE)
 290     {
 291         switch ($action)
 292         {
 293             case 'add':
 294                 $content = $url->extract();
 295
 296                 if ($this->store->add($url->getUrl(), $content['title'], $content['body'], $this->user->getId())) {
 297                     Tools::logm('add link ' . $url->getUrl());
 298                     $sequence = '';
 299                     if (STORAGE == 'postgres') {
 300                         $sequence = 'entries_id_seq';
 301                     }
 302                     $last_id = $this->store->getLastId($sequence);
 303                     if (DOWNLOAD_PICTURES) {
 304                         $content = filtre_picture($content['body'], $url->getUrl(), $last_id);
 305                         Tools::logm('updating content article');
 306                         $this->store->updateContent($last_id, $content, $this->user->getId());
 307                     }
 308                     if (!$import) {
 309                         $this->messages->add('s', _('the link has been added successfully'));
 310                     }
 311                 }
 312                 else {
 313                     if (!$import) {
 314                         $this->messages->add('e', _('error during insertion : the link wasn\'t added'));
 315                         Tools::logm('error during insertion : the link wasn\'t added ' . $url->getUrl());
 316                     }
 317                 }
 318
 319                 if (!$import) {
 320                     Tools::redirect('?view=home');
 321                 }
 322                 break;
 323             case 'delete':
 324                 $msg = 'delete link #' . $id;
 325                 if ($this->store->deleteById($id, $this->user->getId())) {
 326                     if (DOWNLOAD_PICTURES) {
 327                         remove_directory(ABS_PATH . $id);
 328                     }
 329                     $this->messages->add('s', _('the link has been deleted successfully'));
 330                 }
 331                 else {
 332                     $this->messages->add('e', _('the link wasn\'t deleted'));
 333                     $msg = 'error : can\'t delete link #' . $id;
 334                 }
 335                 Tools::logm($msg);
 336                 Tools::redirect();
 337                 break;
 338             case 'toggle_fav' :
 339                 $this->store->favoriteById($id, $this->user->getId());
 340                 Tools::logm('mark as favorite link #' . $id);
 341                 if (!$import) {
 342                     Tools::redirect();
 343                 }
 344                 break;
 345             case 'toggle_archive' :
 346                 $this->store->archiveById($id, $this->user->getId());
 347                 Tools::logm('archive link #' . $id);
 348                 if (!$import) {
 349                     Tools::redirect();
 350                 }
 351                 break;
 352             default:
 353                 break;
 354         }
 355     }
 356
 357     function displayView($view, $id = 0)
 358     {
 359         $tpl_vars = array();
 360
 361         switch ($view)
 362         {
 363             case 'config':
 364                 $dev = $this->getPocheVersion('dev');
 365                 $prod = $this->getPocheVersion('prod');
 366                 $compare_dev = version_compare(POCHE_VERSION, $dev);
 367                 $compare_prod = version_compare(POCHE_VERSION, $prod);
 368                 $themes = $this->getInstalledThemes();
 369                 $tpl_vars = array(
 370                     'themes' => $themes,
 371                     'dev' => $dev,
 372                     'prod' => $prod,
 373                     'compare_dev' => $compare_dev,
 374                     'compare_prod' => $compare_prod,
 375                 );
 376                 Tools::logm('config view');
 377                 break;
 378             case 'view':
 379                 $entry = $this->store->retrieveOneById($id, $this->user->getId());
 380                 if ($entry != NULL) {
 381                     Tools::logm('view link #' . $id);
 382                     $content = $entry['content'];
 383                     if (function_exists('tidy_parse_string')) {
 384                         $tidy = tidy_parse_string($content, array('indent'=>true, 'show-body-only' => true), 'UTF8');
 385                         $tidy->cleanRepair();
 386                         $content = $tidy->value;
 387                     }
 388
 389                     # flattr checking
 390                     $flattr = new FlattrItem();
 391                     $flattr->checkItem($entry['url'],$entry['id']);
 392
 393                     $tpl_vars = array(
 394                     'entry' => $entry,
 395                     'content' => $content,
 396                     'flattr' => $flattr
 397                     );
 398                 }
 399                 else {
 400                     Tools::logm('error in view call : entry is null');
 401                 }
 402                 break;
 403             default: # home, favorites and archive views
 404                 $entries = $this->store->getEntriesByView($view, $this->user->getId());
 405                 $tpl_vars = array(
 406                     'entries' => '',
 407                     'page_links' => '',
 408                     'nb_results' => '',
 409                 );
 410
 411                 # want to display a page too far?
 412                 if ((count($entries) % PAGINATION) + 1 < $_GET['p']) {
 413                     Tools::redirect('');
 414                 }
 415
 416                 if (count($entries) > 0) {
 417                     $this->pagination->set_total(count($entries));
 418                     $page_links = $this->pagination->page_links('?view=' . $view . '&sort=' . $_SESSION['sort'] . '&');
 419                     $datas = $this->store->getEntriesByView($view, $this->user->getId(), $this->pagination->get_limit());
 420                     $tpl_vars['entries'] = $datas;
 421                     $tpl_vars['page_links'] = $page_links;
 422                     $tpl_vars['nb_results'] = count($entries);
 423                 }
 424                 Tools::logm('display ' . $view . ' view');
 425                 break;
 426         }
 427
 428         return $tpl_vars;
 429     }
 430
 431     /**
 432      * update the password of the current user.
 433      * if MODE_DEMO is TRUE, the password can't be updated.
 434      * @todo add the return value
 435      * @todo set the new password in function header like this updatePassword($newPassword)
 436      * @return boolean
 437      */
 438     public function updatePassword()
 439     {
 440         if (MODE_DEMO) {
 441             $this->messages->add('i', _('in demo mode, you can\'t update your password'));
 442             Tools::logm('in demo mode, you can\'t do this');
 443             Tools::redirect('?view=config');
 444         }
 445         else {
 446             if (isset($_POST['password']) && isset($_POST['password_repeat'])) {
 447                 if ($_POST['password'] == $_POST['password_repeat'] && $_POST['password'] != "") {
 448                     $this->messages->add('s', _('your password has been updated'));
 449                     $this->store->updatePassword($this->user->getId(), Tools::encodeString($_POST['password'] . $this->user->getUsername()));
 450                     Session::logout();
 451                     Tools::logm('password updated');
 452                     Tools::redirect();
 453                 }
 454                 else {
 455                     $this->messages->add('e', _('the two fields have to be filled & the password must be the same in the two fields'));
 456                     Tools::redirect('?view=config');
 457                 }
 458             }
 459         }
 460     }
 461
 462     public function updateTheme()
 463     {
 464         # no data
 465         if (empty($_POST['theme'])) {
 466         }
 467
 468         # we are not going to change it to the current theme...
 469         if ($_POST['theme'] == $this->getTheme()) {
 470             $this->messages->add('w', _('still using the "' . $this->getTheme() . '" theme!'));
 471             Tools::redirect('?view=config');
 472         }
 473
 474         $themes = $this->getInstalledThemes();
 475         $actualTheme = false;
 476
 477         foreach ($themes as $theme) {
 478             if ($theme['name'] == $_POST['theme']) {
 479                 $actualTheme = true;
 480                 break;
 481             }
 482         }
 483
 484         if (! $actualTheme) {
 485             $this->messages->add('e', _('that theme does not seem to be installed'));
 486             Tools::redirect('?view=config');
 487         }
 488
 489         $this->store->updateUserConfig($this->user->getId(), 'theme', $_POST['theme']);
 490         $this->messages->add('s', _('you have changed your theme preferences'));
 491
 492         $currentConfig = $_SESSION['poche_user']->config;
 493         $currentConfig['theme'] = $_POST['theme'];
 494
 495         $_SESSION['poche_user']->setConfig($currentConfig);
 496
 497         Tools::redirect('?view=config');
 498     }
 499
 500     /**
 501      * checks if login & password are correct and save the user in session.
 502      * it redirects the user to the $referer link
 503      * @param  string $referer the url to redirect after login
 504      * @todo add the return value
 505      * @return boolean
 506      */
 507     public function login($referer)
 508     {
 509         if (!empty($_POST['login']) && !empty($_POST['password'])) {
 510             $user = $this->store->login($_POST['login'], Tools::encodeString($_POST['password'] . $_POST['login']));
 511             if ($user != array()) {
 512                 # Save login into Session
 513                 Session::login($user['username'], $user['password'], $_POST['login'], Tools::encodeString($_POST['password'] . $_POST['login']), array('poche_user' => new User($user)));
 514                 $this->messages->add('s', _('welcome to your poche'));
 515                 Tools::logm('login successful');
 516                 Tools::redirect($referer);
 517             }
 518             $this->messages->add('e', _('login failed: bad login or password'));
 519             Tools::logm('login failed');
 520             Tools::redirect();
 521         } else {
 522             $this->messages->add('e', _('login failed: you have to fill all fields'));
 523             Tools::logm('login failed');
 524             Tools::redirect();
 525         }
 526     }
 527
 528     /**
 529      * log out the poche user. It cleans the session.
 530      * @todo add the return value
 531      * @return boolean
 532      */
 533     public function logout()
 534     {
 535         $this->user = array();
 536         Session::logout();
 537         $this->messages->add('s', _('see you soon!'));
 538         Tools::logm('logout');
 539         Tools::redirect();
 540     }
 541
 542     /**
 543      * import from Instapaper. poche needs a ./instapaper-export.html file
 544      * @todo add the return value
 545      * @param string $targetFile the file used for importing
 546      * @return boolean
 547      */
 548     private function importFromInstapaper($targetFile)
 549     {
 550         # TODO gestion des articles favs
 551         $html = new simple_html_dom();
 552         $html->load_file($targetFile);
 553         Tools::logm('starting import from instapaper');
 554
 555         $read = 0;
 556         $errors = array();
 557         foreach($html->find('ol') as $ul)
 558         {
 559             foreach($ul->find('li') as $li)
 560             {
 561                 $a = $li->find('a');
 562                 $url = new Url(base64_encode($a[0]->href));
 563                 $this->action('add', $url, 0, TRUE);
 564                 if ($read == '1') {
 565                     $sequence = '';
 566                     if (STORAGE == 'postgres') {
 567                         $sequence = 'entries_id_seq';
 568                     }
 569                     $last_id = $this->store->getLastId($sequence);
 570                     $this->action('toggle_archive', $url, $last_id, TRUE);
 571                 }
 572             }
 573
 574             # the second <ol> is for read links
 575             $read = 1;
 576         }
 577         $this->messages->add('s', _('import from instapaper completed'));
 578         Tools::logm('import from instapaper completed');
 579         Tools::redirect();
 580     }
 581
 582     /**
 583      * import from Pocket. poche needs a ./ril_export.html file
 584      * @todo add the return value
 585      * @param string $targetFile the file used for importing
 586      * @return boolean
 587      */
 588     private function importFromPocket($targetFile)
 589     {
 590         # TODO gestion des articles favs
 591         $html = new simple_html_dom();
 592         $html->load_file($targetFile);
 593         Tools::logm('starting import from pocket');
 594
 595         $read = 0;
 596         $errors = array();
 597         foreach($html->find('ul') as $ul)
 598         {
 599             foreach($ul->find('li') as $li)
 600             {
 601                 $a = $li->find('a');
 602                 $url = new Url(base64_encode($a[0]->href));
 603                 $this->action('add', $url, 0, TRUE);
 604                 if ($read == '1') {
 605                         $sequence = '';
 606                         if (STORAGE == 'postgres') {
 607                             $sequence = 'entries_id_seq';
 608                         }
 609                     $last_id = $this->store->getLastId($sequence);
 610                     $this->action('toggle_archive', $url, $last_id, TRUE);
 611                 }
 612             }
 613
 614             # the second <ul> is for read links
 615             $read = 1;
 616         }
 617         $this->messages->add('s', _('import from pocket completed'));
 618         Tools::logm('import from pocket completed');
 619         Tools::redirect();
 620     }
 621
 622     /**
 623      * import from Readability. poche needs a ./readability file
 624      * @todo add the return value
 625      * @param string $targetFile the file used for importing
 626      * @return boolean
 627      */
 628     private function importFromReadability($targetFile)
 629     {
 630         # TODO gestion des articles lus / favs
 631         $str_data = file_get_contents($targetFile);
 632         $data = json_decode($str_data,true);
 633         Tools::logm('starting import from Readability');
 634         $count = 0;
 635         foreach ($data as $key => $value) {
 636             $url = NULL;
 637             $favorite = FALSE;
 638             $archive = FALSE;
 639             foreach ($value as $attr => $attr_value) {
 640                 if ($attr == 'article__url') {
 641                     $url = new Url(base64_encode($attr_value));
 642                 }
 643                 $sequence = '';
 644                 if (STORAGE == 'postgres') {
 645                     $sequence = 'entries_id_seq';
 646                 }
 647                 if ($attr_value == 'true') {
 648                     if ($attr == 'favorite') {
 649                         $favorite = TRUE;
 650                     }
 651                     if ($attr == 'archive') {
 652                         $archive = TRUE;
 653                     }
 654                 }
 655             }
 656             # we can add the url
 657             if (!is_null($url) && $url->isCorrect()) {
 658                 $this->action('add', $url, 0, TRUE);
 659                 $count++;
 660                 if ($favorite) {
 661                     $last_id = $this->store->getLastId($sequence);
 662                     $this->action('toggle_fav', $url, $last_id, TRUE);
 663                 }
 664                 if ($archive) {
 665                     $last_id = $this->store->getLastId($sequence);
 666                     $this->action('toggle_archive', $url, $last_id, TRUE);
 667                 }
 668             }
 669         }
 670         $this->messages->add('s', _('import from Readability completed. ' . $count . ' new links.'));
 671         Tools::logm('import from Readability completed');
 672         Tools::redirect();
 673     }
 674
 675     /**
 676      * import datas into your poche
 677      * @param  string $from name of the service to import : pocket, instapaper or readability
 678      * @todo add the return value
 679      * @return boolean
 680      */
 681     public function import($from)
 682     {
 683         $providers = array(
 684             'pocket' => 'importFromPocket',
 685             'readability' => 'importFromReadability',
 686             'instapaper' => 'importFromInstapaper'
 687         );
 688
 689         if (! isset($providers[$from])) {
 690             $this->messages->add('e', _('Unknown import provider.'));
 691             Tools::redirect();
 692         }
 693
 694         $targetDefinition = 'IMPORT_' . strtoupper($from) . '_FILE';
 695         $targetFile = constant($targetDefinition);
 696
 697         if (! defined($targetDefinition)) {
 698             $this->messages->add('e', _('Incomplete inc/poche/define.inc.php file, please define "' . $targetDefinition . '".'));
 699             Tools::redirect();
 700         }
 701
 702         if (! file_exists($targetFile)) {
 703             $this->messages->add('e', _('Could not find required "' . $targetFile . '" import file.'));
 704             Tools::redirect();
 705         }
 706
 707         $this->$providers[$from]($targetFile);
 708     }
 709
 710     /**
 711      * export poche entries in json
 712      * @return json all poche entries
 713      */
 714     public function export()
 715     {
 716         $entries = $this->store->retrieveAll($this->user->getId());
 717         echo $this->tpl->render('export.twig', array(
 718             'export' => Tools::renderJson($entries),
 719         ));
 720         Tools::logm('export view');
 721     }
 722
 723     /**
 724      * Checks online the latest version of poche and cache it
 725      * @param  string $which 'prod' or 'dev'
 726      * @return string        latest $which version
 727      */
 728     private function getPocheVersion($which = 'prod')
 729     {
 730         $cache_file = CACHE . '/' . $which;
 731
 732         # checks if the cached version file exists
 733         if (file_exists($cache_file) && (filemtime($cache_file) > (time() - 86400 ))) {
 734            $version = file_get_contents($cache_file);
 735         } else {
 736            $version = file_get_contents('http://static.inthepoche.com/versions/' . $which);
 737            file_put_contents($cache_file, $version, LOCK_EX);
 738         }
 739         return $version;
 740     }
 741 }