index.php

   1 <?php
   2 /**
   3  * Shaarli - The personal, minimalist, super-fast, database free, bookmarking service.
   4  *
   5  * Friendly fork by the Shaarli community:
   6  *  - https://github.com/shaarli/Shaarli
   7  *
   8  * Original project by sebsauvage.net:
   9  *  - http://sebsauvage.net/wiki/doku.php?id=php:shaarli
  10  *  - https://github.com/sebsauvage/Shaarli
  11  *
  12  * Licence: http://www.opensource.org/licenses/zlib-license.php
  13  *
  14  * Requires: PHP 5.5.x
  15  */
  16
  17 // Set 'UTC' as the default timezone if it is not defined in php.ini
  18 // See http://php.net/manual/en/datetime.configuration.php#ini.date.timezone
  19 if (date_default_timezone_get() == '') {
  20     date_default_timezone_set('UTC');
  21 }
  22
  23 /*
  24  * PHP configuration
  25  */
  26
  27 // http://server.com/x/shaarli --> /shaarli/
  28 define('WEB_PATH', substr($_SERVER['REQUEST_URI'], 0, 1+strrpos($_SERVER['REQUEST_URI'], '/', 0)));
  29
  30 // High execution time in case of problematic imports/exports.
  31 ini_set('max_input_time','60');
  32
  33 // Try to set max upload file size and read
  34 ini_set('memory_limit', '128M');
  35 ini_set('post_max_size', '16M');
  36 ini_set('upload_max_filesize', '16M');
  37
  38 // See all error except warnings
  39 error_reporting(E_ALL^E_WARNING);
  40 // See all errors (for debugging only)
  41 //error_reporting(-1);
  42
  43
  44 // 3rd-party libraries
  45 if (! file_exists(__DIR__ . '/vendor/autoload.php')) {
  46     header('Content-Type: text/plain; charset=utf-8');
  47     echo "Error: missing Composer configuration\n\n"
  48         ."If you installed Shaarli through Git or using the development branch,\n"
  49         ."please refer to the installation documentation to install PHP"
  50         ." dependencies using Composer:\n"
  51         ."- https://shaarli.readthedocs.io/en/master/Server-configuration/\n"
  52         ."- https://shaarli.readthedocs.io/en/master/Download-and-Installation/";
  53     exit;
  54 }
  55 require_once 'inc/rain.tpl.class.php';
  56 require_once __DIR__ . '/vendor/autoload.php';
  57
  58 // Shaarli library
  59 require_once 'application/ApplicationUtils.php';
  60 require_once 'application/Cache.php';
  61 require_once 'application/CachedPage.php';
  62 require_once 'application/config/ConfigPlugin.php';
  63 require_once 'application/FeedBuilder.php';
  64 require_once 'application/FileUtils.php';
  65 require_once 'application/History.php';
  66 require_once 'application/HttpUtils.php';
  67 require_once 'application/LinkDB.php';
  68 require_once 'application/LinkFilter.php';
  69 require_once 'application/LinkUtils.php';
  70 require_once 'application/NetscapeBookmarkUtils.php';
  71 require_once 'application/PageBuilder.php';
  72 require_once 'application/TimeZone.php';
  73 require_once 'application/Url.php';
  74 require_once 'application/Utils.php';
  75 require_once 'application/PluginManager.php';
  76 require_once 'application/Router.php';
  77 require_once 'application/Updater.php';
  78 use \Shaarli\Config\ConfigManager;
  79 use \Shaarli\Languages;
  80 use \Shaarli\Security\LoginManager;
  81 use \Shaarli\Security\SessionManager;
  82 use \Shaarli\ThemeUtils;
  83 use \Shaarli\Thumbnailer;
  84
  85 // Ensure the PHP version is supported
  86 try {
  87     ApplicationUtils::checkPHPVersion('5.5', PHP_VERSION);
  88 } catch(Exception $exc) {
  89     header('Content-Type: text/plain; charset=utf-8');
  90     echo $exc->getMessage();
  91     exit;
  92 }
  93
  94 define('SHAARLI_VERSION', ApplicationUtils::getVersion(__DIR__ .'/'. ApplicationUtils::$VERSION_FILE));
  95
  96 // Force cookie path (but do not change lifetime)
  97 $cookie = session_get_cookie_params();
  98 $cookiedir = '';
  99 if (dirname($_SERVER['SCRIPT_NAME']) != '/') {
 100     $cookiedir = dirname($_SERVER["SCRIPT_NAME"]).'/';
 101 }
 102 // Set default cookie expiration and path.
 103 session_set_cookie_params($cookie['lifetime'], $cookiedir, $_SERVER['SERVER_NAME']);
 104 // Set session parameters on server side.
 105 // Use cookies to store session.
 106 ini_set('session.use_cookies', 1);
 107 // Force cookies for session (phpsessionID forbidden in URL).
 108 ini_set('session.use_only_cookies', 1);
 109 // Prevent PHP form using sessionID in URL if cookies are disabled.
 110 ini_set('session.use_trans_sid', false);
 111
 112 session_name('shaarli');
 113 // Start session if needed (Some server auto-start sessions).
 114 if (session_id() == '') {
 115     session_start();
 116 }
 117
 118 // Regenerate session ID if invalid or not defined in cookie.
 119 if (isset($_COOKIE['shaarli']) && !SessionManager::checkId($_COOKIE['shaarli'])) {
 120     session_regenerate_id(true);
 121     $_COOKIE['shaarli'] = session_id();
 122 }
 123
 124 $conf = new ConfigManager();
 125 $sessionManager = new SessionManager($_SESSION, $conf);
 126 $loginManager = new LoginManager($GLOBALS, $conf, $sessionManager);
 127 $loginManager->generateStaySignedInToken($_SERVER['REMOTE_ADDR']);
 128 $clientIpId = client_ip_id($_SERVER);
 129
 130 // LC_MESSAGES isn't defined without php-intl, in this case use LC_COLLATE locale instead.
 131 if (! defined('LC_MESSAGES')) {
 132     define('LC_MESSAGES', LC_COLLATE);
 133 }
 134
 135 // Sniff browser language and set date format accordingly.
 136 if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
 137     autoLocale($_SERVER['HTTP_ACCEPT_LANGUAGE']);
 138 }
 139
 140 new Languages(setlocale(LC_MESSAGES, 0), $conf);
 141
 142 $conf->setEmpty('general.timezone', date_default_timezone_get());
 143 $conf->setEmpty('general.title', t('Shared links on '). escape(index_url($_SERVER)));
 144 RainTPL::$tpl_dir = $conf->get('resource.raintpl_tpl').'/'.$conf->get('resource.theme').'/'; // template directory
 145 RainTPL::$cache_dir = $conf->get('resource.raintpl_tmp'); // cache directory
 146
 147 $pluginManager = new PluginManager($conf);
 148 $pluginManager->load($conf->get('general.enabled_plugins'));
 149
 150 date_default_timezone_set($conf->get('general.timezone', 'UTC'));
 151
 152 ob_start();  // Output buffering for the page cache.
 153
 154 // Prevent caching on client side or proxy: (yes, it's ugly)
 155 header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
 156 header("Cache-Control: no-store, no-cache, must-revalidate");
 157 header("Cache-Control: post-check=0, pre-check=0", false);
 158 header("Pragma: no-cache");
 159
 160 if (! is_file($conf->getConfigFileExt())) {
 161     // Ensure Shaarli has proper access to its resources
 162     $errors = ApplicationUtils::checkResourcePermissions($conf);
 163
 164     if ($errors != array()) {
 165         $message = '<p>'. t('Insufficient permissions:') .'</p><ul>';
 166
 167         foreach ($errors as $error) {
 168             $message .= '<li>'.$error.'</li>';
 169         }
 170         $message .= '</ul>';
 171
 172         header('Content-Type: text/html; charset=utf-8');
 173         echo $message;
 174         exit;
 175     }
 176
 177     // Display the installation form if no existing config is found
 178     install($conf, $sessionManager, $loginManager);
 179 }
 180
 181 $loginManager->checkLoginState($_COOKIE, $clientIpId);
 182
 183 /**
 184  * Adapter function to ensure compatibility with third-party templates
 185  *
 186  * @see https://github.com/shaarli/Shaarli/pull/1086
 187  *
 188  * @return bool true when the user is logged in, false otherwise
 189  */
 190 function isLoggedIn()
 191 {
 192     global $loginManager;
 193     return $loginManager->isLoggedIn();
 194 }
 195
 196
 197 // ------------------------------------------------------------------------------------------
 198 // Process login form: Check if login/password is correct.
 199 if (isset($_POST['login'])) {
 200     if (! $loginManager->canLogin($_SERVER)) {
 201         die(t('I said: NO. You are banned for the moment. Go away.'));
 202     }
 203     if (isset($_POST['password'])
 204         && $sessionManager->checkToken($_POST['token'])
 205         && $loginManager->checkCredentials($_SERVER['REMOTE_ADDR'], $clientIpId, $_POST['login'], $_POST['password'])
 206     ) {
 207         $loginManager->handleSuccessfulLogin($_SERVER);
 208
 209         $cookiedir = '';
 210         if (dirname($_SERVER['SCRIPT_NAME']) != '/') {
 211             // Note: Never forget the trailing slash on the cookie path!
 212             $cookiedir = dirname($_SERVER["SCRIPT_NAME"]) . '/';
 213         }
 214
 215         if (!empty($_POST['longlastingsession'])) {
 216             // Keep the session cookie even after the browser closes
 217             $sessionManager->setStaySignedIn(true);
 218             $expirationTime = $sessionManager->extendSession();
 219
 220             setcookie(
 221                 $loginManager::$STAY_SIGNED_IN_COOKIE,
 222                 $loginManager->getStaySignedInToken(),
 223                 $expirationTime,
 224                 WEB_PATH
 225             );
 226
 227         } else {
 228             // Standard session expiration (=when browser closes)
 229             $expirationTime = 0;
 230         }
 231
 232         // Send cookie with the new expiration date to the browser
 233         session_set_cookie_params($expirationTime, $cookiedir, $_SERVER['SERVER_NAME']);
 234         session_regenerate_id(true);
 235
 236         // Optional redirect after login:
 237         if (isset($_GET['post'])) {
 238             $uri = '?post='. urlencode($_GET['post']);
 239             foreach (array('description', 'source', 'title', 'tags') as $param) {
 240                 if (!empty($_GET[$param])) {
 241                     $uri .= '&'.$param.'='.urlencode($_GET[$param]);
 242                 }
 243             }
 244             header('Location: '. $uri);
 245             exit;
 246         }
 247
 248         if (isset($_GET['edit_link'])) {
 249             header('Location: ?edit_link='. escape($_GET['edit_link']));
 250             exit;
 251         }
 252
 253         if (isset($_POST['returnurl'])) {
 254             // Prevent loops over login screen.
 255             if (strpos($_POST['returnurl'], 'do=login') === false) {
 256                 header('Location: '. generateLocation($_POST['returnurl'], $_SERVER['HTTP_HOST']));
 257                 exit;
 258             }
 259         }
 260         header('Location: ?'); exit;
 261     } else {
 262         $loginManager->handleFailedLogin($_SERVER);
 263         $redir = '&username='. urlencode($_POST['login']);
 264         if (isset($_GET['post'])) {
 265             $redir .= '&post=' . urlencode($_GET['post']);
 266             foreach (array('description', 'source', 'title', 'tags') as $param) {
 267                 if (!empty($_GET[$param])) {
 268                     $redir .= '&' . $param . '=' . urlencode($_GET[$param]);
 269                 }
 270             }
 271         }
 272         // Redirect to login screen.
 273         echo '<script>alert("'. t("Wrong login/password.") .'");document.location=\'?do=login'.$redir.'\';</script>';
 274         exit;
 275     }
 276 }
 277
 278 // ------------------------------------------------------------------------------------------
 279 // Token management for XSRF protection
 280 // Token should be used in any form which acts on data (create,update,delete,import...).
 281 if (!isset($_SESSION['tokens'])) $_SESSION['tokens']=array();  // Token are attached to the session.
 282
 283 /**
 284  * Daily RSS feed: 1 RSS entry per day giving all the links on that day.
 285  * Gives the last 7 days (which have links).
 286  * This RSS feed cannot be filtered.
 287  *
 288  * @param ConfigManager $conf         Configuration Manager instance
 289  * @param LoginManager  $loginManager LoginManager instance
 290  */
 291 function showDailyRSS($conf, $loginManager) {
 292     // Cache system
 293     $query = $_SERVER['QUERY_STRING'];
 294     $cache = new CachedPage(
 295         $conf->get('config.PAGE_CACHE'),
 296         page_url($_SERVER),
 297         startsWith($query,'do=dailyrss') && !$loginManager->isLoggedIn()
 298     );
 299     $cached = $cache->cachedVersion();
 300     if (!empty($cached)) {
 301         echo $cached;
 302         exit;
 303     }
 304
 305     // If cached was not found (or not usable), then read the database and build the response:
 306     // Read links from database (and filter private links if used it not logged in).
 307     $LINKSDB = new LinkDB(
 308         $conf->get('resource.datastore'),
 309         $loginManager->isLoggedIn(),
 310         $conf->get('privacy.hide_public_links'),
 311         $conf->get('redirector.url'),
 312         $conf->get('redirector.encode_url')
 313     );
 314
 315     /* Some Shaarlies may have very few links, so we need to look
 316        back in time until we have enough days ($nb_of_days).
 317     */
 318     $nb_of_days = 7; // We take 7 days.
 319     $today = date('Ymd');
 320     $days = array();
 321
 322     foreach ($LINKSDB as $link) {
 323         $day = $link['created']->format('Ymd'); // Extract day (without time)
 324         if (strcmp($day, $today) < 0) {
 325             if (empty($days[$day])) {
 326                 $days[$day] = array();
 327             }
 328             $days[$day][] = $link;
 329         }
 330
 331         if (count($days) > $nb_of_days) {
 332             break; // Have we collected enough days?
 333         }
 334     }
 335
 336     // Build the RSS feed.
 337     header('Content-Type: application/rss+xml; charset=utf-8');
 338     $pageaddr = escape(index_url($_SERVER));
 339     echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0">';
 340     echo '<channel>';
 341     echo '<title>Daily - '. $conf->get('general.title') . '</title>';
 342     echo '<link>'. $pageaddr .'</link>';
 343     echo '<description>Daily shared links</description>';
 344     echo '<language>en-en</language>';
 345     echo '<copyright>'. $pageaddr .'</copyright>'. PHP_EOL;
 346
 347     // For each day.
 348     foreach ($days as $day => $links) {
 349         $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 350         $absurl = escape(index_url($_SERVER).'?do=daily&day='.$day);  // Absolute URL of the corresponding "Daily" page.
 351
 352         // We pre-format some fields for proper output.
 353         foreach ($links as &$link) {
 354             $link['formatedDescription'] = format_description(
 355                 $link['description'],
 356                 $conf->get('redirector.url'),
 357                 $conf->get('redirector.encode_url')
 358             );
 359             $link['thumbnail'] = thumbnail($conf, $link['url']);
 360             $link['timestamp'] = $link['created']->getTimestamp();
 361             if (startsWith($link['url'], '?')) {
 362                 $link['url'] = index_url($_SERVER) . $link['url'];  // make permalink URL absolute
 363             }
 364         }
 365
 366         // Then build the HTML for this day:
 367         $tpl = new RainTPL;
 368         $tpl->assign('title', $conf->get('general.title'));
 369         $tpl->assign('daydate', $dayDate->getTimestamp());
 370         $tpl->assign('absurl', $absurl);
 371         $tpl->assign('links', $links);
 372         $tpl->assign('rssdate', escape($dayDate->format(DateTime::RSS)));
 373         $tpl->assign('hide_timestamps', $conf->get('privacy.hide_timestamps', false));
 374         $html = $tpl->draw('dailyrss', true);
 375
 376         echo $html . PHP_EOL;
 377     }
 378     echo '</channel></rss><!-- Cached version of '. escape(page_url($_SERVER)) .' -->';
 379
 380     $cache->cache(ob_get_contents());
 381     ob_end_flush();
 382     exit;
 383 }
 384
 385 /**
 386  * Show the 'Daily' page.
 387  *
 388  * @param PageBuilder   $pageBuilder   Template engine wrapper.
 389  * @param LinkDB        $LINKSDB       LinkDB instance.
 390  * @param ConfigManager $conf          Configuration Manager instance.
 391  * @param PluginManager $pluginManager Plugin Manager instance.
 392  * @param LoginManager  $loginManager  Login Manager instance
 393  */
 394 function showDaily($pageBuilder, $LINKSDB, $conf, $pluginManager, $loginManager)
 395 {
 396     $day = date('Ymd', strtotime('-1 day')); // Yesterday, in format YYYYMMDD.
 397     if (isset($_GET['day'])) {
 398       $day = $_GET['day'];
 399     }
 400
 401     $days = $LINKSDB->days();
 402     $i = array_search($day, $days);
 403     if ($i === false && count($days)) {
 404         // no links for day, but at least one day with links
 405         $i = count($days) - 1;
 406         $day = $days[$i];
 407     }
 408     $previousday = '';
 409     $nextday = '';
 410
 411     if ($i !== false) {
 412         if ($i >= 1) {
 413              $previousday=$days[$i - 1];
 414         }
 415         if ($i < count($days) - 1) {
 416           $nextday = $days[$i + 1];
 417         }
 418     }
 419     try {
 420         $linksToDisplay = $LINKSDB->filterDay($day);
 421     } catch (Exception $exc) {
 422         error_log($exc);
 423         $linksToDisplay = array();
 424     }
 425
 426     // We pre-format some fields for proper output.
 427     foreach($linksToDisplay as $key => $link) {
 428         $taglist = explode(' ',$link['tags']);
 429         uasort($taglist, 'strcasecmp');
 430         $linksToDisplay[$key]['taglist']=$taglist;
 431         $linksToDisplay[$key]['formatedDescription'] = format_description(
 432             $link['description'],
 433             $conf->get('redirector.url'),
 434             $conf->get('redirector.encode_url')
 435         );
 436         $linksToDisplay[$key]['thumbnail'] = thumbnail($conf, $link['url']);
 437         $linksToDisplay[$key]['timestamp'] =  $link['created']->getTimestamp();
 438     }
 439
 440     $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 441     $data = array(
 442         'pagetitle' => $conf->get('general.title') .' - '. format_date($dayDate, false),
 443         'linksToDisplay' => $linksToDisplay,
 444         'day' => $dayDate->getTimestamp(),
 445         'dayDate' => $dayDate,
 446         'previousday' => $previousday,
 447         'nextday' => $nextday,
 448     );
 449
 450     /* Hook is called before column construction so that plugins don't have
 451        to deal with columns. */
 452     $pluginManager->executeHooks('render_daily', $data, array('loggedin' => $loginManager->isLoggedIn()));
 453
 454     /* We need to spread the articles on 3 columns.
 455        I did not want to use a JavaScript lib like http://masonry.desandro.com/
 456        so I manually spread entries with a simple method: I roughly evaluate the
 457        height of a div according to title and description length.
 458     */
 459     $columns = array(array(), array(), array()); // Entries to display, for each column.
 460     $fill = array(0, 0, 0);  // Rough estimate of columns fill.
 461     foreach($data['linksToDisplay'] as $key => $link) {
 462         // Roughly estimate length of entry (by counting characters)
 463         // Title: 30 chars = 1 line. 1 line is 30 pixels height.
 464         // Description: 836 characters gives roughly 342 pixel height.
 465         // This is not perfect, but it's usually OK.
 466         $length = strlen($link['title']) + (342 * strlen($link['description'])) / 836;
 467         if ($link['thumbnail']) {
 468           $length += 100; // 1 thumbnails roughly takes 100 pixels height.
 469         }
 470         // Then put in column which is the less filled:
 471         $smallest = min($fill); // find smallest value in array.
 472         $index = array_search($smallest, $fill); // find index of this smallest value.
 473         array_push($columns[$index], $link); // Put entry in this column.
 474         $fill[$index] += $length;
 475     }
 476
 477     $data['cols'] = $columns;
 478
 479     foreach ($data as $key => $value) {
 480         $pageBuilder->assign($key, $value);
 481     }
 482
 483     $pageBuilder->assign('pagetitle', t('Daily') .' - '. $conf->get('general.title', 'Shaarli'));
 484     $pageBuilder->renderPage('daily');
 485     exit;
 486 }
 487
 488 /**
 489  * Renders the linklist
 490  *
 491  * @param pageBuilder   $PAGE    pageBuilder instance.
 492  * @param LinkDB        $LINKSDB LinkDB instance.
 493  * @param ConfigManager $conf    Configuration Manager instance.
 494  * @param PluginManager $pluginManager Plugin Manager instance.
 495  */
 496 function showLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager) {
 497     buildLinkList($PAGE,$LINKSDB, $conf, $pluginManager, $loginManager);
 498     $PAGE->renderPage('linklist');
 499 }
 500
 501 /**
 502  * Render HTML page (according to URL parameters and user rights)
 503  *
 504  * @param ConfigManager  $conf           Configuration Manager instance.
 505  * @param PluginManager  $pluginManager  Plugin Manager instance,
 506  * @param LinkDB         $LINKSDB
 507  * @param History        $history        instance
 508  * @param SessionManager $sessionManager SessionManager instance
 509  * @param LoginManager   $loginManager   LoginManager instance
 510  */
 511 function renderPage($conf, $pluginManager, $LINKSDB, $history, $sessionManager, $loginManager)
 512 {
 513     $updater = new Updater(
 514         read_updates_file($conf->get('resource.updates')),
 515         $LINKSDB,
 516         $conf,
 517         $loginManager->isLoggedIn()
 518     );
 519     try {
 520         $newUpdates = $updater->update();
 521         if (! empty($newUpdates)) {
 522             write_updates_file(
 523                 $conf->get('resource.updates'),
 524                 $updater->getDoneUpdates()
 525             );
 526         }
 527     }
 528     catch(Exception $e) {
 529         die($e->getMessage());
 530     }
 531
 532     $PAGE = new PageBuilder($conf, $LINKSDB, $sessionManager->generateToken(), $loginManager->isLoggedIn());
 533     $PAGE->assign('linkcount', count($LINKSDB));
 534     $PAGE->assign('privateLinkcount', count_private($LINKSDB));
 535     $PAGE->assign('plugin_errors', $pluginManager->getErrors());
 536
 537     // Determine which page will be rendered.
 538     $query = (isset($_SERVER['QUERY_STRING'])) ? $_SERVER['QUERY_STRING'] : '';
 539     $targetPage = Router::findPage($query, $_GET, $loginManager->isLoggedIn());
 540
 541     if (
 542         // if the user isn't logged in
 543         !$loginManager->isLoggedIn() &&
 544         // and Shaarli doesn't have public content...
 545         $conf->get('privacy.hide_public_links') &&
 546         // and is configured to enforce the login
 547         $conf->get('privacy.force_login') &&
 548         // and the current page isn't already the login page
 549         $targetPage !== Router::$PAGE_LOGIN &&
 550         // and the user is not requesting a feed (which would lead to a different content-type as expected)
 551         $targetPage !== Router::$PAGE_FEED_ATOM &&
 552         $targetPage !== Router::$PAGE_FEED_RSS
 553     ) {
 554         // force current page to be the login page
 555         $targetPage = Router::$PAGE_LOGIN;
 556     }
 557
 558     // Call plugin hooks for header, footer and includes, specifying which page will be rendered.
 559     // Then assign generated data to RainTPL.
 560     $common_hooks = array(
 561         'includes',
 562         'header',
 563         'footer',
 564     );
 565
 566     foreach($common_hooks as $name) {
 567         $plugin_data = array();
 568         $pluginManager->executeHooks('render_' . $name, $plugin_data,
 569             array(
 570                 'target' => $targetPage,
 571                 'loggedin' => $loginManager->isLoggedIn()
 572             )
 573         );
 574         $PAGE->assign('plugins_' . $name, $plugin_data);
 575     }
 576
 577     // -------- Display login form.
 578     if ($targetPage == Router::$PAGE_LOGIN)
 579     {
 580         if ($conf->get('security.open_shaarli')) { header('Location: ?'); exit; }  // No need to login for open Shaarli
 581         if (isset($_GET['username'])) {
 582             $PAGE->assign('username', escape($_GET['username']));
 583         }
 584         $PAGE->assign('returnurl',(isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']):''));
 585         // add default state of the 'remember me' checkbox
 586         $PAGE->assign('remember_user_default', $conf->get('privacy.remember_user_default'));
 587         $PAGE->assign('user_can_login', $loginManager->canLogin($_SERVER));
 588         $PAGE->assign('pagetitle', t('Login') .' - '. $conf->get('general.title', 'Shaarli'));
 589         $PAGE->renderPage('loginform');
 590         exit;
 591     }
 592     // -------- User wants to logout.
 593     if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=logout'))
 594     {
 595         invalidateCaches($conf->get('resource.page_cache'));
 596         $sessionManager->logout();
 597         setcookie(LoginManager::$STAY_SIGNED_IN_COOKIE, 'false', 0, WEB_PATH);
 598         header('Location: ?');
 599         exit;
 600     }
 601
 602     // -------- Picture wall
 603     if ($targetPage == Router::$PAGE_PICWALL)
 604     {
 605         if (! $conf->get('thumbnails.enabled')) {
 606             $PAGE->renderPage('picwall');
 607             exit;
 608         }
 609
 610         // Optionally filter the results:
 611         $links = $LINKSDB->filterSearch($_GET);
 612         $linksToDisplay = array();
 613
 614         $thumbnailer = new Thumbnailer($conf);
 615
 616
 617         $newThumbnailsCpt = 0;
 618         // Get only links which have a thumbnail.
 619         foreach($links as $key => $link)
 620         {
 621             // Not a note,
 622             // and (never retrieved yet or no valid cache file)
 623             if ($link['url'][0] != '?'
 624                 && (! isset($link['thumbnail']) || ($link['thumbnail'] !== false && ! is_file($link['thumbnail'])))
 625             ) {
 626                 $item = $LINKSDB[$key];
 627                 $item['thumbnail'] = $thumbnailer->get($link['url']);
 628                 $LINKSDB[$key] = $item;
 629                 $newThumbnailsCpt++;
 630             }
 631
 632             if (isset($link['thumbnail']) && $link['thumbnail'] !== false) {
 633                 $linksToDisplay[] = $link; // Add to array.
 634             }
 635
 636             // If we retrieved new thumbnails, we update the database every 20 links.
 637             // Downloading everything the first time may take a very long time
 638             if ($newThumbnailsCpt == 20) {
 639                 $LINKSDB->save($conf->get('resource.page_cache'));
 640                 $newThumbnailsCpt = 0;
 641             }
 642         }
 643
 644         if ($newThumbnailsCpt > 0) {
 645             $LINKSDB->save($conf->get('resource.page_cache'));
 646         }
 647
 648         $data = array(
 649             'linksToDisplay' => $linksToDisplay,
 650         );
 651         $pluginManager->executeHooks('render_picwall', $data, array('loggedin' => $loginManager->isLoggedIn()));
 652
 653         foreach ($data as $key => $value) {
 654             $PAGE->assign($key, $value);
 655         }
 656
 657         $PAGE->assign('pagetitle', t('Picture wall') .' - '. $conf->get('general.title', 'Shaarli'));
 658         $PAGE->renderPage('picwall');
 659         exit;
 660     }
 661
 662     // -------- Tag cloud
 663     if ($targetPage == Router::$PAGE_TAGCLOUD)
 664     {
 665         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
 666         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 667         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 668
 669         // We sort tags alphabetically, then choose a font size according to count.
 670         // First, find max value.
 671         $maxcount = 0;
 672         foreach ($tags as $value) {
 673             $maxcount = max($maxcount, $value);
 674         }
 675
 676         alphabetical_sort($tags, false, true);
 677
 678         $tagList = array();
 679         foreach($tags as $key => $value) {
 680             if (in_array($key, $filteringTags)) {
 681                 continue;
 682             }
 683             // Tag font size scaling:
 684             //   default 15 and 30 logarithm bases affect scaling,
 685             //   22 and 6 are arbitrary font sizes for max and min sizes.
 686             $size = log($value, 15) / log($maxcount, 30) * 2.2 + 0.8;
 687             $tagList[$key] = array(
 688                 'count' => $value,
 689                 'size' => number_format($size, 2, '.', ''),
 690             );
 691         }
 692
 693         $searchTags = implode(' ', escape($filteringTags));
 694         $data = array(
 695             'search_tags' => $searchTags,
 696             'tags' => $tagList,
 697         );
 698         $pluginManager->executeHooks('render_tagcloud', $data, array('loggedin' => $loginManager->isLoggedIn()));
 699
 700         foreach ($data as $key => $value) {
 701             $PAGE->assign($key, $value);
 702         }
 703
 704         $searchTags = ! empty($searchTags) ? $searchTags .' - ' : '';
 705         $PAGE->assign('pagetitle', $searchTags. t('Tag cloud') .' - '. $conf->get('general.title', 'Shaarli'));
 706         $PAGE->renderPage('tag.cloud');
 707         exit;
 708     }
 709
 710     // -------- Tag list
 711     if ($targetPage == Router::$PAGE_TAGLIST)
 712     {
 713         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
 714         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 715         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 716         foreach ($filteringTags as $tag) {
 717             if (array_key_exists($tag, $tags)) {
 718                 unset($tags[$tag]);
 719             }
 720         }
 721
 722         if (! empty($_GET['sort']) && $_GET['sort'] === 'alpha') {
 723             alphabetical_sort($tags, false, true);
 724         }
 725
 726         $searchTags = implode(' ', escape($filteringTags));
 727         $data = [
 728             'search_tags' => $searchTags,
 729             'tags' => $tags,
 730         ];
 731         $pluginManager->executeHooks('render_taglist', $data, ['loggedin' => $loginManager->isLoggedIn()]);
 732
 733         foreach ($data as $key => $value) {
 734             $PAGE->assign($key, $value);
 735         }
 736
 737         $searchTags = ! empty($searchTags) ? $searchTags .' - ' : '';
 738         $PAGE->assign('pagetitle', $searchTags . t('Tag list') .' - '. $conf->get('general.title', 'Shaarli'));
 739         $PAGE->renderPage('tag.list');
 740         exit;
 741     }
 742
 743     // Daily page.
 744     if ($targetPage == Router::$PAGE_DAILY) {
 745         showDaily($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
 746     }
 747
 748     // ATOM and RSS feed.
 749     if ($targetPage == Router::$PAGE_FEED_ATOM || $targetPage == Router::$PAGE_FEED_RSS) {
 750         $feedType = $targetPage == Router::$PAGE_FEED_RSS ? FeedBuilder::$FEED_RSS : FeedBuilder::$FEED_ATOM;
 751         header('Content-Type: application/'. $feedType .'+xml; charset=utf-8');
 752
 753         // Cache system
 754         $query = $_SERVER['QUERY_STRING'];
 755         $cache = new CachedPage(
 756             $conf->get('resource.page_cache'),
 757             page_url($_SERVER),
 758             startsWith($query,'do='. $targetPage) && !$loginManager->isLoggedIn()
 759         );
 760         $cached = $cache->cachedVersion();
 761         if (!empty($cached)) {
 762             echo $cached;
 763             exit;
 764         }
 765
 766         // Generate data.
 767         $feedGenerator = new FeedBuilder($LINKSDB, $feedType, $_SERVER, $_GET, $loginManager->isLoggedIn());
 768         $feedGenerator->setLocale(strtolower(setlocale(LC_COLLATE, 0)));
 769         $feedGenerator->setHideDates($conf->get('privacy.hide_timestamps') && !$loginManager->isLoggedIn());
 770         $feedGenerator->setUsePermalinks(isset($_GET['permalinks']) || !$conf->get('feed.rss_permalinks'));
 771         $data = $feedGenerator->buildData();
 772
 773         // Process plugin hook.
 774         $pluginManager->executeHooks('render_feed', $data, array(
 775             'loggedin' => $loginManager->isLoggedIn(),
 776             'target' => $targetPage,
 777         ));
 778
 779         // Render the template.
 780         $PAGE->assignAll($data);
 781         $PAGE->renderPage('feed.'. $feedType);
 782         $cache->cache(ob_get_contents());
 783         ob_end_flush();
 784         exit;
 785     }
 786
 787     // Display opensearch plugin (XML)
 788     if ($targetPage == Router::$PAGE_OPENSEARCH) {
 789         header('Content-Type: application/xml; charset=utf-8');
 790         $PAGE->assign('serverurl', index_url($_SERVER));
 791         $PAGE->renderPage('opensearch');
 792         exit;
 793     }
 794
 795     // -------- User clicks on a tag in a link: The tag is added to the list of searched tags (searchtags=...)
 796     if (isset($_GET['addtag']))
 797     {
 798         // Get previous URL (http_referer) and add the tag to the searchtags parameters in query.
 799         if (empty($_SERVER['HTTP_REFERER'])) { header('Location: ?searchtags='.urlencode($_GET['addtag'])); exit; } // In case browser does not send HTTP_REFERER
 800         parse_str(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_QUERY), $params);
 801
 802         // Prevent redirection loop
 803         if (isset($params['addtag'])) {
 804             unset($params['addtag']);
 805         }
 806
 807         // Check if this tag is already in the search query and ignore it if it is.
 808         // Each tag is always separated by a space
 809         if (isset($params['searchtags'])) {
 810             $current_tags = explode(' ', $params['searchtags']);
 811         } else {
 812             $current_tags = array();
 813         }
 814         $addtag = true;
 815         foreach ($current_tags as $value) {
 816             if ($value === $_GET['addtag']) {
 817                 $addtag = false;
 818                 break;
 819             }
 820         }
 821         // Append the tag if necessary
 822         if (empty($params['searchtags'])) {
 823             $params['searchtags'] = trim($_GET['addtag']);
 824         }
 825         elseif ($addtag) {
 826             $params['searchtags'] = trim($params['searchtags']).' '.trim($_GET['addtag']);
 827         }
 828
 829         unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
 830         header('Location: ?'.http_build_query($params));
 831         exit;
 832     }
 833
 834     // -------- User clicks on a tag in result count: Remove the tag from the list of searched tags (searchtags=...)
 835     if (isset($_GET['removetag'])) {
 836         // Get previous URL (http_referer) and remove the tag from the searchtags parameters in query.
 837         if (empty($_SERVER['HTTP_REFERER'])) {
 838             header('Location: ?');
 839             exit;
 840         }
 841
 842         // In case browser does not send HTTP_REFERER
 843         parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $params);
 844
 845         // Prevent redirection loop
 846         if (isset($params['removetag'])) {
 847             unset($params['removetag']);
 848         }
 849
 850         if (isset($params['searchtags'])) {
 851             $tags = explode(' ', $params['searchtags']);
 852             // Remove value from array $tags.
 853             $tags = array_diff($tags, array($_GET['removetag']));
 854             $params['searchtags'] = implode(' ',$tags);
 855
 856             if (empty($params['searchtags'])) {
 857                 unset($params['searchtags']);
 858             }
 859
 860             unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
 861         }
 862         header('Location: ?'.http_build_query($params));
 863         exit;
 864     }
 865
 866     // -------- User wants to change the number of links per page (linksperpage=...)
 867     if (isset($_GET['linksperpage'])) {
 868         if (is_numeric($_GET['linksperpage'])) {
 869             $_SESSION['LINKS_PER_PAGE']=abs(intval($_GET['linksperpage']));
 870         }
 871
 872         if (! empty($_SERVER['HTTP_REFERER'])) {
 873             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('linksperpage'));
 874         } else {
 875             $location = '?';
 876         }
 877         header('Location: '. $location);
 878         exit;
 879     }
 880
 881     // -------- User wants to see only private links (toggle)
 882     if (isset($_GET['visibility'])) {
 883         if ($_GET['visibility'] === 'private') {
 884             // Visibility not set or not already private, set private, otherwise reset it
 885             if (empty($_SESSION['visibility']) || $_SESSION['visibility'] !== 'private') {
 886                 // See only private links
 887                 $_SESSION['visibility'] = 'private';
 888             } else {
 889                 unset($_SESSION['visibility']);
 890             }
 891         } elseif ($_GET['visibility'] === 'public') {
 892             if (empty($_SESSION['visibility']) || $_SESSION['visibility'] !== 'public') {
 893                 // See only public links
 894                 $_SESSION['visibility'] = 'public';
 895             } else {
 896                 unset($_SESSION['visibility']);
 897             }
 898         }
 899
 900         if (! empty($_SERVER['HTTP_REFERER'])) {
 901             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('visibility'));
 902         } else {
 903             $location = '?';
 904         }
 905         header('Location: '. $location);
 906         exit;
 907     }
 908
 909     // -------- User wants to see only untagged links (toggle)
 910     if (isset($_GET['untaggedonly'])) {
 911         $_SESSION['untaggedonly'] = empty($_SESSION['untaggedonly']);
 912
 913         if (! empty($_SERVER['HTTP_REFERER'])) {
 914             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('untaggedonly'));
 915         } else {
 916             $location = '?';
 917         }
 918         header('Location: '. $location);
 919         exit;
 920     }
 921
 922     // -------- Handle other actions allowed for non-logged in users:
 923     if (!$loginManager->isLoggedIn())
 924     {
 925         // User tries to post new link but is not logged in:
 926         // Show login screen, then redirect to ?post=...
 927         if (isset($_GET['post']))
 928         {
 929             header( // Redirect to login page, then back to post link.
 930                 'Location: ?do=login&post='.urlencode($_GET['post']).
 931                 (!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').
 932                 (!empty($_GET['description'])?'&description='.urlencode($_GET['description']):'').
 933                 (!empty($_GET['tags'])?'&tags='.urlencode($_GET['tags']):'').
 934                 (!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')
 935             );
 936             exit;
 937         }
 938
 939         showLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
 940         if (isset($_GET['edit_link'])) {
 941             header('Location: ?do=login&edit_link='. escape($_GET['edit_link']));
 942             exit;
 943         }
 944
 945         exit; // Never remove this one! All operations below are reserved for logged in user.
 946     }
 947
 948     // -------- All other functions are reserved for the registered user:
 949
 950     // -------- Display the Tools menu if requested (import/export/bookmarklet...)
 951     if ($targetPage == Router::$PAGE_TOOLS)
 952     {
 953         $data = [
 954             'pageabsaddr' => index_url($_SERVER),
 955             'sslenabled' => is_https($_SERVER),
 956         ];
 957         $pluginManager->executeHooks('render_tools', $data);
 958
 959         foreach ($data as $key => $value) {
 960             $PAGE->assign($key, $value);
 961         }
 962
 963         $PAGE->assign('pagetitle', t('Tools') .' - '. $conf->get('general.title', 'Shaarli'));
 964         $PAGE->renderPage('tools');
 965         exit;
 966     }
 967
 968     // -------- User wants to change his/her password.
 969     if ($targetPage == Router::$PAGE_CHANGEPASSWORD)
 970     {
 971         if ($conf->get('security.open_shaarli')) {
 972             die(t('You are not supposed to change a password on an Open Shaarli.'));
 973         }
 974
 975         if (!empty($_POST['setpassword']) && !empty($_POST['oldpassword']))
 976         {
 977             if (!$sessionManager->checkToken($_POST['token'])) die(t('Wrong token.')); // Go away!
 978
 979             // Make sure old password is correct.
 980             $oldhash = sha1($_POST['oldpassword'].$conf->get('credentials.login').$conf->get('credentials.salt'));
 981             if ($oldhash!= $conf->get('credentials.hash')) {
 982                 echo '<script>alert("'. t('The old password is not correct.') .'");document.location=\'?do=changepasswd\';</script>';
 983                 exit;
 984             }
 985             // Save new password
 986             // Salt renders rainbow-tables attacks useless.
 987             $conf->set('credentials.salt', sha1(uniqid('', true) .'_'. mt_rand()));
 988             $conf->set('credentials.hash', sha1($_POST['setpassword'] . $conf->get('credentials.login') . $conf->get('credentials.salt')));
 989             try {
 990                 $conf->write($loginManager->isLoggedIn());
 991             }
 992             catch(Exception $e) {
 993                 error_log(
 994                     'ERROR while writing config file after changing password.' . PHP_EOL .
 995                     $e->getMessage()
 996                 );
 997
 998                 // TODO: do not handle exceptions/errors in JS.
 999                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=tools\';</script>';
1000                 exit;
1001             }
1002             echo '<script>alert("'. t('Your password has been changed') .'");document.location=\'?do=tools\';</script>';
1003             exit;
1004         }
1005         else // show the change password form.
1006         {
1007             $PAGE->assign('pagetitle', t('Change password') .' - '. $conf->get('general.title', 'Shaarli'));
1008             $PAGE->renderPage('changepassword');
1009             exit;
1010         }
1011     }
1012
1013     // -------- User wants to change configuration
1014     if ($targetPage == Router::$PAGE_CONFIGURE)
1015     {
1016         if (!empty($_POST['title']) )
1017         {
1018             if (!$sessionManager->checkToken($_POST['token'])) {
1019                 die(t('Wrong token.')); // Go away!
1020             }
1021             $tz = 'UTC';
1022             if (!empty($_POST['continent']) && !empty($_POST['city'])
1023                 && isTimeZoneValid($_POST['continent'], $_POST['city'])
1024             ) {
1025                 $tz = $_POST['continent'] . '/' . $_POST['city'];
1026             }
1027             $conf->set('general.timezone', $tz);
1028             $conf->set('general.title', escape($_POST['title']));
1029             $conf->set('general.header_link', escape($_POST['titleLink']));
1030             $conf->set('resource.theme', escape($_POST['theme']));
1031             $conf->set('security.session_protection_disabled', !empty($_POST['disablesessionprotection']));
1032             $conf->set('privacy.default_private_links', !empty($_POST['privateLinkByDefault']));
1033             $conf->set('feed.rss_permalinks', !empty($_POST['enableRssPermalinks']));
1034             $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1035             $conf->set('privacy.hide_public_links', !empty($_POST['hidePublicLinks']));
1036             $conf->set('api.enabled', !empty($_POST['enableApi']));
1037             $conf->set('api.secret', escape($_POST['apiSecret']));
1038             $conf->set('translation.language', escape($_POST['language']));
1039             $conf->set('thumbnails.enabled', extension_loaded('gd') && !empty($_POST['enableThumbnails']));
1040
1041             try {
1042                 $conf->write($loginManager->isLoggedIn());
1043                 $history->updateSettings();
1044                 invalidateCaches($conf->get('resource.page_cache'));
1045             }
1046             catch(Exception $e) {
1047                 error_log(
1048                     'ERROR while writing config file after configuration update.' . PHP_EOL .
1049                     $e->getMessage()
1050                 );
1051
1052                 // TODO: do not handle exceptions/errors in JS.
1053                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=configure\';</script>';
1054                 exit;
1055             }
1056             echo '<script>alert("'. t('Configuration was saved.') .'");document.location=\'?do=configure\';</script>';
1057             exit;
1058         }
1059         else // Show the configuration form.
1060         {
1061             $PAGE->assign('title', $conf->get('general.title'));
1062             $PAGE->assign('theme', $conf->get('resource.theme'));
1063             $PAGE->assign('theme_available', ThemeUtils::getThemes($conf->get('resource.raintpl_tpl')));
1064             list($continents, $cities) = generateTimeZoneData(
1065                 timezone_identifiers_list(),
1066                 $conf->get('general.timezone')
1067             );
1068             $PAGE->assign('continents', $continents);
1069             $PAGE->assign('cities', $cities);
1070             $PAGE->assign('private_links_default', $conf->get('privacy.default_private_links', false));
1071             $PAGE->assign('session_protection_disabled', $conf->get('security.session_protection_disabled', false));
1072             $PAGE->assign('enable_rss_permalinks', $conf->get('feed.rss_permalinks', false));
1073             $PAGE->assign('enable_update_check', $conf->get('updates.check_updates', true));
1074             $PAGE->assign('hide_public_links', $conf->get('privacy.hide_public_links', false));
1075             $PAGE->assign('api_enabled', $conf->get('api.enabled', true));
1076             $PAGE->assign('api_secret', $conf->get('api.secret'));
1077             $PAGE->assign('languages', Languages::getAvailableLanguages());
1078             $PAGE->assign('language', $conf->get('translation.language'));
1079             $PAGE->assign('gd_enabled', extension_loaded('gd'));
1080             $PAGE->assign('pagetitle', t('Configure') .' - '. $conf->get('general.title', 'Shaarli'));
1081             $PAGE->renderPage('configure');
1082             exit;
1083         }
1084     }
1085
1086     // -------- User wants to rename a tag or delete it
1087     if ($targetPage == Router::$PAGE_CHANGETAG)
1088     {
1089         if (empty($_POST['fromtag']) || (empty($_POST['totag']) && isset($_POST['renametag']))) {
1090             $PAGE->assign('fromtag', ! empty($_GET['fromtag']) ? escape($_GET['fromtag']) : '');
1091             $PAGE->assign('pagetitle', t('Manage tags') .' - '. $conf->get('general.title', 'Shaarli'));
1092             $PAGE->renderPage('changetag');
1093             exit;
1094         }
1095
1096         if (!$sessionManager->checkToken($_POST['token'])) {
1097             die(t('Wrong token.'));
1098         }
1099
1100         $alteredLinks = $LINKSDB->renameTag(escape($_POST['fromtag']), escape($_POST['totag']));
1101         $LINKSDB->save($conf->get('resource.page_cache'));
1102         foreach ($alteredLinks as $link) {
1103             $history->updateLink($link);
1104         }
1105         $delete = empty($_POST['totag']);
1106         $redirect = $delete ? 'do=changetag' : 'searchtags='. urlencode(escape($_POST['totag']));
1107         $count = count($alteredLinks);
1108         $alert = $delete
1109             ? sprintf(t('The tag was removed from %d link.', 'The tag was removed from %d links.', $count), $count)
1110             : sprintf(t('The tag was renamed in %d link.', 'The tag was renamed in %d links.', $count), $count);
1111         echo '<script>alert("'. $alert .'");document.location=\'?'. $redirect .'\';</script>';
1112         exit;
1113     }
1114
1115     // -------- User wants to add a link without using the bookmarklet: Show form.
1116     if ($targetPage == Router::$PAGE_ADDLINK)
1117     {
1118         $PAGE->assign('pagetitle', t('Shaare a new link') .' - '. $conf->get('general.title', 'Shaarli'));
1119         $PAGE->renderPage('addlink');
1120         exit;
1121     }
1122
1123     // -------- User clicked the "Save" button when editing a link: Save link to database.
1124     if (isset($_POST['save_edit']))
1125     {
1126         // Go away!
1127         if (! $sessionManager->checkToken($_POST['token'])) {
1128             die(t('Wrong token.'));
1129         }
1130
1131         // lf_id should only be present if the link exists.
1132         $id = isset($_POST['lf_id']) ? intval(escape($_POST['lf_id'])) : $LINKSDB->getNextId();
1133         // Linkdate is kept here to:
1134         //   - use the same permalink for notes as they're displayed when creating them
1135         //   - let users hack creation date of their posts
1136         //     See: https://shaarli.readthedocs.io/en/master/Various-hacks/#changing-the-timestamp-for-a-shaare
1137         $linkdate = escape($_POST['lf_linkdate']);
1138         if (isset($LINKSDB[$id])) {
1139             // Edit
1140             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1141             $updated = new DateTime();
1142             $shortUrl = $LINKSDB[$id]['shorturl'];
1143             $new = false;
1144         } else {
1145             // New link
1146             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1147             $updated = null;
1148             $shortUrl = link_small_hash($created, $id);
1149             $new = true;
1150         }
1151
1152         // Remove multiple spaces.
1153         $tags = trim(preg_replace('/\s\s+/', ' ', $_POST['lf_tags']));
1154         // Remove first '-' char in tags.
1155         $tags = preg_replace('/(^| )\-/', '$1', $tags);
1156         // Remove duplicates.
1157         $tags = implode(' ', array_unique(explode(' ', $tags)));
1158
1159         if (empty(trim($_POST['lf_url']))) {
1160             $_POST['lf_url'] = '?' . smallHash($linkdate . $id);
1161         }
1162         $url = whitelist_protocols(trim($_POST['lf_url']), $conf->get('security.allowed_protocols'));
1163
1164         $link = array(
1165             'id' => $id,
1166             'title' => trim($_POST['lf_title']),
1167             'url' => $url,
1168             'description' => $_POST['lf_description'],
1169             'private' => (isset($_POST['lf_private']) ? 1 : 0),
1170             'created' => $created,
1171             'updated' => $updated,
1172             'tags' => str_replace(',', ' ', $tags),
1173             'shorturl' => $shortUrl,
1174         );
1175
1176         // If title is empty, use the URL as title.
1177         if ($link['title'] == '') {
1178             $link['title'] = $link['url'];
1179         }
1180
1181         if ($conf->get('thumbnails.enabled')) {
1182             $thumbnailer = new Thumbnailer($conf);
1183             $link['thumbnail'] = $thumbnailer->get($url);
1184         }
1185
1186         $pluginManager->executeHooks('save_link', $link);
1187
1188         $LINKSDB[$id] = $link;
1189         $LINKSDB->save($conf->get('resource.page_cache'));
1190         if ($new) {
1191             $history->addLink($link);
1192         } else {
1193             $history->updateLink($link);
1194         }
1195
1196         // If we are called from the bookmarklet, we must close the popup:
1197         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1198             echo '<script>self.close();</script>';
1199             exit;
1200         }
1201
1202         $returnurl = !empty($_POST['returnurl']) ? $_POST['returnurl'] : '?';
1203         $location = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1204         // Scroll to the link which has been edited.
1205         $location .= '#' . $link['shorturl'];
1206         // After saving the link, redirect to the page the user was on.
1207         header('Location: '. $location);
1208         exit;
1209     }
1210
1211     // -------- User clicked the "Cancel" button when editing a link.
1212     if (isset($_POST['cancel_edit']))
1213     {
1214         $id = isset($_POST['lf_id']) ? (int) escape($_POST['lf_id']) : false;
1215         if (! isset($LINKSDB[$id])) {
1216             header('Location: ?');
1217         }
1218         // If we are called from the bookmarklet, we must close the popup:
1219         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1220         $link = $LINKSDB[$id];
1221         $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
1222         // Scroll to the link which has been edited.
1223         $returnurl .= '#'. $link['shorturl'];
1224         $returnurl = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1225         header('Location: '.$returnurl); // After canceling, redirect to the page the user was on.
1226         exit;
1227     }
1228
1229     // -------- User clicked the "Delete" button when editing a link: Delete link from database.
1230     if ($targetPage == Router::$PAGE_DELETELINK)
1231     {
1232         if (! $sessionManager->checkToken($_GET['token'])) {
1233             die(t('Wrong token.'));
1234         }
1235
1236         $ids = trim($_GET['lf_linkdate']);
1237         if (strpos($ids, ' ') !== false) {
1238             // multiple, space-separated ids provided
1239             $ids = array_values(array_filter(preg_split('/\s+/', escape($ids))));
1240         } else {
1241             // only a single id provided
1242             $ids = [$ids];
1243         }
1244         // assert at least one id is given
1245         if(!count($ids)){
1246             die('no id provided');
1247         }
1248         foreach ($ids as $id) {
1249             $id = (int) escape($id);
1250             $link = $LINKSDB[$id];
1251             $pluginManager->executeHooks('delete_link', $link);
1252             unset($LINKSDB[$id]);
1253         }
1254         $LINKSDB->save($conf->get('resource.page_cache')); // save to disk
1255         $history->deleteLink($link);
1256
1257         // If we are called from the bookmarklet, we must close the popup:
1258         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1259
1260         $location = '?';
1261         if (isset($_SERVER['HTTP_REFERER'])) {
1262             // Don't redirect to where we were previously if it was a permalink or an edit_link, because it would 404.
1263             $location = generateLocation(
1264                     $_SERVER['HTTP_REFERER'],
1265                     $_SERVER['HTTP_HOST'],
1266                     ['delete_link', 'edit_link', $link['shorturl']]
1267             );
1268         }
1269
1270         header('Location: ' . $location); // After deleting the link, redirect to appropriate location
1271         exit;
1272     }
1273
1274     // -------- User clicked the "EDIT" button on a link: Display link edit form.
1275     if (isset($_GET['edit_link']))
1276     {
1277         $id = (int) escape($_GET['edit_link']);
1278         $link = $LINKSDB[$id];  // Read database
1279         if (!$link) { header('Location: ?'); exit; } // Link not found in database.
1280         $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1281         $data = array(
1282             'link' => $link,
1283             'link_is_new' => false,
1284             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1285             'tags' => $LINKSDB->linksCountPerTag(),
1286         );
1287         $pluginManager->executeHooks('render_editlink', $data);
1288
1289         foreach ($data as $key => $value) {
1290             $PAGE->assign($key, $value);
1291         }
1292
1293         $PAGE->assign('pagetitle', t('Edit') .' '. t('Shaare') .' - '. $conf->get('general.title', 'Shaarli'));
1294         $PAGE->renderPage('editlink');
1295         exit;
1296     }
1297
1298     // -------- User want to post a new link: Display link edit form.
1299     if (isset($_GET['post'])) {
1300         $url = cleanup_url($_GET['post']);
1301
1302         $link_is_new = false;
1303         // Check if URL is not already in database (in this case, we will edit the existing link)
1304         $link = $LINKSDB->getLinkFromUrl($url);
1305         if (! $link)
1306         {
1307             $link_is_new = true;
1308             $linkdate = strval(date(LinkDB::LINK_DATE_FORMAT));
1309             // Get title if it was provided in URL (by the bookmarklet).
1310             $title = empty($_GET['title']) ? '' : escape($_GET['title']);
1311             // Get description if it was provided in URL (by the bookmarklet). [Bronco added that]
1312             $description = empty($_GET['description']) ? '' : escape($_GET['description']);
1313             $tags = empty($_GET['tags']) ? '' : escape($_GET['tags']);
1314             $private = !empty($_GET['private']) && $_GET['private'] === "1" ? 1 : 0;
1315             // If this is an HTTP(S) link, we try go get the page to extract the title (otherwise we will to straight to the edit form.)
1316             if (empty($title) && strpos(get_url_scheme($url), 'http') !== false) {
1317                 // Short timeout to keep the application responsive
1318                 // The callback will fill $charset and $title with data from the downloaded page.
1319                 get_http_response(
1320                     $url,
1321                     $conf->get('general.download_timeout', 30),
1322                     $conf->get('general.download_max_size', 4194304),
1323                     get_curl_download_callback($charset, $title)
1324                 );
1325                 if (! empty($title) && strtolower($charset) != 'utf-8') {
1326                     $title = mb_convert_encoding($title, 'utf-8', $charset);
1327                 }
1328             }
1329
1330             if ($url == '') {
1331                 $url = '?' . smallHash($linkdate . $LINKSDB->getNextId());
1332                 $title = $conf->get('general.default_note_title', t('Note: '));
1333             }
1334             $url = escape($url);
1335             $title = escape($title);
1336
1337             $link = array(
1338                 'linkdate' => $linkdate,
1339                 'title' => $title,
1340                 'url' => $url,
1341                 'description' => $description,
1342                 'tags' => $tags,
1343                 'private' => $private,
1344             );
1345         } else {
1346             $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1347         }
1348
1349         $data = array(
1350             'link' => $link,
1351             'link_is_new' => $link_is_new,
1352             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1353             'source' => (isset($_GET['source']) ? $_GET['source'] : ''),
1354             'tags' => $LINKSDB->linksCountPerTag(),
1355             'default_private_links' => $conf->get('privacy.default_private_links', false),
1356         );
1357         $pluginManager->executeHooks('render_editlink', $data);
1358
1359         foreach ($data as $key => $value) {
1360             $PAGE->assign($key, $value);
1361         }
1362
1363         $PAGE->assign('pagetitle', t('Shaare') .' - '. $conf->get('general.title', 'Shaarli'));
1364         $PAGE->renderPage('editlink');
1365         exit;
1366     }
1367
1368     if ($targetPage == Router::$PAGE_EXPORT) {
1369         // Export links as a Netscape Bookmarks file
1370
1371         if (empty($_GET['selection'])) {
1372             $PAGE->assign('pagetitle', t('Export') .' - '. $conf->get('general.title', 'Shaarli'));
1373             $PAGE->renderPage('export');
1374             exit;
1375         }
1376
1377         // export as bookmarks_(all|private|public)_YYYYmmdd_HHMMSS.html
1378         $selection = $_GET['selection'];
1379         if (isset($_GET['prepend_note_url'])) {
1380             $prependNoteUrl = $_GET['prepend_note_url'];
1381         } else {
1382             $prependNoteUrl = false;
1383         }
1384
1385         try {
1386             $PAGE->assign(
1387                 'links',
1388                 NetscapeBookmarkUtils::filterAndFormat(
1389                     $LINKSDB,
1390                     $selection,
1391                     $prependNoteUrl,
1392                     index_url($_SERVER)
1393                 )
1394             );
1395         } catch (Exception $exc) {
1396             header('Content-Type: text/plain; charset=utf-8');
1397             echo $exc->getMessage();
1398             exit;
1399         }
1400         $now = new DateTime();
1401         header('Content-Type: text/html; charset=utf-8');
1402         header(
1403             'Content-disposition: attachment; filename=bookmarks_'
1404            .$selection.'_'.$now->format(LinkDB::LINK_DATE_FORMAT).'.html'
1405         );
1406         $PAGE->assign('date', $now->format(DateTime::RFC822));
1407         $PAGE->assign('eol', PHP_EOL);
1408         $PAGE->assign('selection', $selection);
1409         $PAGE->renderPage('export.bookmarks');
1410         exit;
1411     }
1412
1413     if ($targetPage == Router::$PAGE_IMPORT) {
1414         // Upload a Netscape bookmark dump to import its contents
1415
1416         if (! isset($_POST['token']) || ! isset($_FILES['filetoupload'])) {
1417             // Show import dialog
1418             $PAGE->assign(
1419                 'maxfilesize',
1420                 get_max_upload_size(
1421                     ini_get('post_max_size'),
1422                     ini_get('upload_max_filesize'),
1423                     false
1424                 )
1425             );
1426             $PAGE->assign(
1427                 'maxfilesizeHuman',
1428                 get_max_upload_size(
1429                     ini_get('post_max_size'),
1430                     ini_get('upload_max_filesize'),
1431                     true
1432                 )
1433             );
1434             $PAGE->assign('pagetitle', t('Import') .' - '. $conf->get('general.title', 'Shaarli'));
1435             $PAGE->renderPage('import');
1436             exit;
1437         }
1438
1439         // Import bookmarks from an uploaded file
1440         if (isset($_FILES['filetoupload']['size']) && $_FILES['filetoupload']['size'] == 0) {
1441             // The file is too big or some form field may be missing.
1442             $msg = sprintf(
1443                 t(
1444                     'The file you are trying to upload is probably bigger than what this webserver can accept'
1445                     .' (%s). Please upload in smaller chunks.'
1446                 ),
1447                 get_max_upload_size(ini_get('post_max_size'), ini_get('upload_max_filesize'))
1448             );
1449             echo '<script>alert("'. $msg .'");document.location=\'?do='.Router::$PAGE_IMPORT .'\';</script>';
1450             exit;
1451         }
1452         if (! $sessionManager->checkToken($_POST['token'])) {
1453             die('Wrong token.');
1454         }
1455         $status = NetscapeBookmarkUtils::import(
1456             $_POST,
1457             $_FILES,
1458             $LINKSDB,
1459             $conf,
1460             $history
1461         );
1462         echo '<script>alert("'.$status.'");document.location=\'?do='
1463              .Router::$PAGE_IMPORT .'\';</script>';
1464         exit;
1465     }
1466
1467     // Plugin administration page
1468     if ($targetPage == Router::$PAGE_PLUGINSADMIN) {
1469         $pluginMeta = $pluginManager->getPluginsMeta();
1470
1471         // Split plugins into 2 arrays: ordered enabled plugins and disabled.
1472         $enabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] !== false; });
1473         // Load parameters.
1474         $enabledPlugins = load_plugin_parameter_values($enabledPlugins, $conf->get('plugins', array()));
1475         uasort(
1476             $enabledPlugins,
1477             function($a, $b) { return $a['order'] - $b['order']; }
1478         );
1479         $disabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] === false; });
1480
1481         $PAGE->assign('enabledPlugins', $enabledPlugins);
1482         $PAGE->assign('disabledPlugins', $disabledPlugins);
1483         $PAGE->assign('pagetitle', t('Plugin administration') .' - '. $conf->get('general.title', 'Shaarli'));
1484         $PAGE->renderPage('pluginsadmin');
1485         exit;
1486     }
1487
1488     // Plugin administration form action
1489     if ($targetPage == Router::$PAGE_SAVE_PLUGINSADMIN) {
1490         try {
1491             if (isset($_POST['parameters_form'])) {
1492                 unset($_POST['parameters_form']);
1493                 foreach ($_POST as $param => $value) {
1494                     $conf->set('plugins.'. $param, escape($value));
1495                 }
1496             }
1497             else {
1498                 $conf->set('general.enabled_plugins', save_plugin_config($_POST));
1499             }
1500             $conf->write($loginManager->isLoggedIn());
1501             $history->updateSettings();
1502         }
1503         catch (Exception $e) {
1504             error_log(
1505                 'ERROR while saving plugin configuration:.' . PHP_EOL .
1506                 $e->getMessage()
1507             );
1508
1509             // TODO: do not handle exceptions/errors in JS.
1510             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do='. Router::$PAGE_PLUGINSADMIN .'\';</script>';
1511             exit;
1512         }
1513         header('Location: ?do='. Router::$PAGE_PLUGINSADMIN);
1514         exit;
1515     }
1516
1517     // Get a fresh token
1518     if ($targetPage == Router::$GET_TOKEN) {
1519         header('Content-Type:text/plain');
1520         echo $sessionManager->generateToken($conf);
1521         exit;
1522     }
1523
1524     // -------- Otherwise, simply display search form and links:
1525     showLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
1526     exit;
1527 }
1528
1529 /**
1530  * Template for the list of links (<div id="linklist">)
1531  * This function fills all the necessary fields in the $PAGE for the template 'linklist.html'
1532  *
1533  * @param pageBuilder   $PAGE          pageBuilder instance.
1534  * @param LinkDB        $LINKSDB       LinkDB instance.
1535  * @param ConfigManager $conf          Configuration Manager instance.
1536  * @param PluginManager $pluginManager Plugin Manager instance.
1537  * @param LoginManager  $loginManager  LoginManager instance
1538  */
1539 function buildLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager)
1540 {
1541     // Used in templates
1542     if (isset($_GET['searchtags'])) {
1543         if (! empty($_GET['searchtags'])) {
1544             $searchtags = escape(normalize_spaces($_GET['searchtags']));
1545         } else {
1546             $searchtags = false;
1547         }
1548     } else {
1549         $searchtags = '';
1550     }
1551     $searchterm = !empty($_GET['searchterm']) ? escape(normalize_spaces($_GET['searchterm'])) : '';
1552
1553     // Smallhash filter
1554     if (! empty($_SERVER['QUERY_STRING'])
1555         && preg_match('/^[a-zA-Z0-9-_@]{6}($|&|#)/', $_SERVER['QUERY_STRING'])) {
1556         try {
1557             $linksToDisplay = $LINKSDB->filterHash($_SERVER['QUERY_STRING']);
1558         } catch (LinkNotFoundException $e) {
1559             $PAGE->render404($e->getMessage());
1560             exit;
1561         }
1562     } else {
1563         // Filter links according search parameters.
1564         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
1565         $request = [
1566             'searchtags' => $searchtags,
1567             'searchterm' => $searchterm,
1568         ];
1569         $linksToDisplay = $LINKSDB->filterSearch($request, false, $visibility, !empty($_SESSION['untaggedonly']));
1570     }
1571
1572     // ---- Handle paging.
1573     $keys = array();
1574     foreach ($linksToDisplay as $key => $value) {
1575         $keys[] = $key;
1576     }
1577
1578     // Select articles according to paging.
1579     $pagecount = ceil(count($keys) / $_SESSION['LINKS_PER_PAGE']);
1580     $pagecount = $pagecount == 0 ? 1 : $pagecount;
1581     $page= empty($_GET['page']) ? 1 : intval($_GET['page']);
1582     $page = $page < 1 ? 1 : $page;
1583     $page = $page > $pagecount ? $pagecount : $page;
1584     // Start index.
1585     $i = ($page-1) * $_SESSION['LINKS_PER_PAGE'];
1586     $end = $i + $_SESSION['LINKS_PER_PAGE'];
1587
1588     if ($conf->get('thumbnails.enabled')) {
1589         $thumbnailer = new Thumbnailer($conf);
1590     }
1591
1592     $linkDisp = array();
1593     while ($i<$end && $i<count($keys))
1594     {
1595         $link = $linksToDisplay[$keys[$i]];
1596         $link['description'] = format_description(
1597             $link['description'],
1598             $conf->get('redirector.url'),
1599             $conf->get('redirector.encode_url')
1600         );
1601         $classLi =  ($i % 2) != 0 ? '' : 'publicLinkHightLight';
1602         $link['class'] = $link['private'] == 0 ? $classLi : 'private';
1603         $link['timestamp'] = $link['created']->getTimestamp();
1604         if (! empty($link['updated'])) {
1605             $link['updated_timestamp'] = $link['updated']->getTimestamp();
1606         } else {
1607             $link['updated_timestamp'] = '';
1608         }
1609         $taglist = preg_split('/\s+/', $link['tags'], -1, PREG_SPLIT_NO_EMPTY);
1610         uasort($taglist, 'strcasecmp');
1611         $link['taglist'] = $taglist;
1612
1613         // Thumbnails enabled, not a note,
1614         // and (never retrieved yet or no valid cache file)
1615         if ($conf->get('thumbnails.enabled') && $link['url'][0] != '?'
1616             && (! isset($link['thumbnail']) || ($link['thumbnail'] !== false && ! is_file($link['thumbnail'])))
1617         ) {
1618             $elem = $LINKSDB[$keys[$i]];
1619             $elem['thumbnail'] = $thumbnailer->get($link['url']);
1620             $LINKSDB[$keys[$i]] = $elem;
1621             $updateDB = true;
1622             $link['thumbnail'] = $elem['thumbnail'];
1623         }
1624
1625         // Check for both signs of a note: starting with ? and 7 chars long.
1626         if ($link['url'][0] === '?' && strlen($link['url']) === 7) {
1627             $link['url'] = index_url($_SERVER) . $link['url'];
1628         }
1629
1630         $linkDisp[$keys[$i]] = $link;
1631         $i++;
1632     }
1633
1634     // If we retrieved new thumbnails, we update the database.
1635     if (!empty($updateDB)) {
1636         $LINKSDB->save($conf->get('resource.page_cache'));
1637     }
1638
1639     // Compute paging navigation
1640     $searchtagsUrl = $searchtags === '' ? '' : '&searchtags=' . urlencode($searchtags);
1641     $searchtermUrl = empty($searchterm) ? '' : '&searchterm=' . urlencode($searchterm);
1642     $previous_page_url = '';
1643     if ($i != count($keys)) {
1644         $previous_page_url = '?page=' . ($page+1) . $searchtermUrl . $searchtagsUrl;
1645     }
1646     $next_page_url='';
1647     if ($page>1) {
1648         $next_page_url = '?page=' . ($page-1) . $searchtermUrl . $searchtagsUrl;
1649     }
1650
1651     // Fill all template fields.
1652     $data = array(
1653         'previous_page_url' => $previous_page_url,
1654         'next_page_url' => $next_page_url,
1655         'page_current' => $page,
1656         'page_max' => $pagecount,
1657         'result_count' => count($linksToDisplay),
1658         'search_term' => $searchterm,
1659         'search_tags' => $searchtags,
1660         'visibility' => ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '',
1661         'redirector' => $conf->get('redirector.url'),  // Optional redirector URL.
1662         'links' => $linkDisp,
1663     );
1664
1665     // If there is only a single link, we change on-the-fly the title of the page.
1666     if (count($linksToDisplay) == 1) {
1667         $data['pagetitle'] = $linksToDisplay[$keys[0]]['title'] .' - '. $conf->get('general.title');
1668     } elseif (! empty($searchterm) || ! empty($searchtags)) {
1669         $data['pagetitle'] = t('Search: ');
1670         $data['pagetitle'] .= ! empty($searchterm) ? $searchterm .' ' : '';
1671         $bracketWrap = function ($tag) {
1672             return '['. $tag .']';
1673         };
1674         $data['pagetitle'] .= ! empty($searchtags)
1675             ? implode(' ', array_map($bracketWrap, preg_split('/\s+/', $searchtags))).' '
1676             : '';
1677         $data['pagetitle'] .= '- '. $conf->get('general.title');
1678     }
1679
1680     $pluginManager->executeHooks('render_linklist', $data, array('loggedin' => $loginManager->isLoggedIn()));
1681
1682     foreach ($data as $key => $value) {
1683         $PAGE->assign($key, $value);
1684     }
1685
1686     return;
1687 }
1688
1689 /**
1690  * Installation
1691  * This function should NEVER be called if the file data/config.php exists.
1692  *
1693  * @param ConfigManager  $conf           Configuration Manager instance.
1694  * @param SessionManager $sessionManager SessionManager instance
1695  * @param LoginManager   $loginManager   LoginManager instance
1696  */
1697 function install($conf, $sessionManager, $loginManager) {
1698     // On free.fr host, make sure the /sessions directory exists, otherwise login will not work.
1699     if (endsWith($_SERVER['HTTP_HOST'],'.free.fr') && !is_dir($_SERVER['DOCUMENT_ROOT'].'/sessions')) mkdir($_SERVER['DOCUMENT_ROOT'].'/sessions',0705);
1700
1701
1702     // This part makes sure sessions works correctly.
1703     // (Because on some hosts, session.save_path may not be set correctly,
1704     // or we may not have write access to it.)
1705     if (isset($_GET['test_session']) && ( !isset($_SESSION) || !isset($_SESSION['session_tested']) || $_SESSION['session_tested']!='Working'))
1706     {
1707         // Step 2: Check if data in session is correct.
1708         $msg = t(
1709             '<pre>Sessions do not seem to work correctly on your server.<br>'.
1710             'Make sure the variable "session.save_path" is set correctly in your PHP config, '.
1711             'and that you have write access to it.<br>'.
1712             'It currently points to %s.<br>'.
1713             'On some browsers, accessing your server via a hostname like \'localhost\' '.
1714             'or any custom hostname without a dot causes cookie storage to fail. '.
1715             'We recommend accessing your server via it\'s IP address or Fully Qualified Domain Name.<br>'
1716         );
1717         $msg = sprintf($msg, session_save_path());
1718         echo $msg;
1719         echo '<br><a href="?">'. t('Click to try again.') .'</a></pre>';
1720         die;
1721     }
1722     if (!isset($_SESSION['session_tested']))
1723     {   // Step 1 : Try to store data in session and reload page.
1724         $_SESSION['session_tested'] = 'Working';  // Try to set a variable in session.
1725         header('Location: '.index_url($_SERVER).'?test_session');  // Redirect to check stored data.
1726     }
1727     if (isset($_GET['test_session']))
1728     {   // Step 3: Sessions are OK. Remove test parameter from URL.
1729         header('Location: '.index_url($_SERVER));
1730     }
1731
1732
1733     if (!empty($_POST['setlogin']) && !empty($_POST['setpassword']))
1734     {
1735         $tz = 'UTC';
1736         if (!empty($_POST['continent']) && !empty($_POST['city'])
1737             && isTimeZoneValid($_POST['continent'], $_POST['city'])
1738         ) {
1739             $tz = $_POST['continent'].'/'.$_POST['city'];
1740         }
1741         $conf->set('general.timezone', $tz);
1742         $login = $_POST['setlogin'];
1743         $conf->set('credentials.login', $login);
1744         $salt = sha1(uniqid('', true) .'_'. mt_rand());
1745         $conf->set('credentials.salt', $salt);
1746         $conf->set('credentials.hash', sha1($_POST['setpassword'] . $login . $salt));
1747         if (!empty($_POST['title'])) {
1748             $conf->set('general.title', escape($_POST['title']));
1749         } else {
1750             $conf->set('general.title', 'Shared links on '.escape(index_url($_SERVER)));
1751         }
1752         $conf->set('translation.language', escape($_POST['language']));
1753         $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1754         $conf->set('api.enabled', !empty($_POST['enableApi']));
1755         $conf->set(
1756             'api.secret',
1757             generate_api_secret(
1758                 $conf->get('credentials.login'),
1759                 $conf->get('credentials.salt')
1760             )
1761         );
1762         try {
1763             // Everything is ok, let's create config file.
1764             $conf->write($loginManager->isLoggedIn());
1765         }
1766         catch(Exception $e) {
1767             error_log(
1768                     'ERROR while writing config file after installation.' . PHP_EOL .
1769                     $e->getMessage()
1770                 );
1771
1772             // TODO: do not handle exceptions/errors in JS.
1773             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?\';</script>';
1774             exit;
1775         }
1776         echo '<script>alert("Shaarli is now configured. Please enter your login/password and start shaaring your links!");document.location=\'?do=login\';</script>';
1777         exit;
1778     }
1779
1780     $PAGE = new PageBuilder($conf, null, $sessionManager->generateToken());
1781     list($continents, $cities) = generateTimeZoneData(timezone_identifiers_list(), date_default_timezone_get());
1782     $PAGE->assign('continents', $continents);
1783     $PAGE->assign('cities', $cities);
1784     $PAGE->assign('languages', Languages::getAvailableLanguages());
1785     $PAGE->renderPage('install');
1786     exit;
1787 }
1788
1789 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=dailyrss')) { showDailyRSS($conf); exit; }
1790 if (!isset($_SESSION['LINKS_PER_PAGE'])) {
1791     $_SESSION['LINKS_PER_PAGE'] = $conf->get('general.links_per_page', 20);
1792 }
1793
1794 try {
1795     $history = new History($conf->get('resource.history'));
1796 } catch(Exception $e) {
1797     die($e->getMessage());
1798 }
1799
1800 $linkDb = new LinkDB(
1801     $conf->get('resource.datastore'),
1802     $loginManager->isLoggedIn(),
1803     $conf->get('privacy.hide_public_links'),
1804     $conf->get('redirector.url'),
1805     $conf->get('redirector.encode_url')
1806 );
1807
1808 $container = new \Slim\Container();
1809 $container['conf'] = $conf;
1810 $container['plugins'] = $pluginManager;
1811 $container['history'] = $history;
1812 $app = new \Slim\App($container);
1813
1814 // REST API routes
1815 $app->group('/api/v1', function() {
1816     $this->get('/info', '\Shaarli\Api\Controllers\Info:getInfo')->setName('getInfo');
1817     $this->get('/links', '\Shaarli\Api\Controllers\Links:getLinks')->setName('getLinks');
1818     $this->get('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:getLink')->setName('getLink');
1819     $this->post('/links', '\Shaarli\Api\Controllers\Links:postLink')->setName('postLink');
1820     $this->put('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:putLink')->setName('putLink');
1821     $this->delete('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:deleteLink')->setName('deleteLink');
1822     $this->get('/history', '\Shaarli\Api\Controllers\History:getHistory')->setName('getHistory');
1823 })->add('\Shaarli\Api\ApiMiddleware');
1824
1825 $response = $app->run(true);
1826 // Hack to make Slim and Shaarli router work together:
1827 // If a Slim route isn't found and NOT API call, we call renderPage().
1828 if ($response->getStatusCode() == 404 && strpos($_SERVER['REQUEST_URI'], '/api/v1') === false) {
1829     // We use UTF-8 for proper international characters handling.
1830     header('Content-Type: text/html; charset=utf-8');
1831     renderPage($conf, $pluginManager, $linkDb, $history, $sessionManager, $loginManager);
1832 } else {
1833     $app->respond($response);
1834 }