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
  15 // Set 'UTC' as the default timezone if it is not defined in php.ini
  16 // See http://php.net/manual/en/datetime.configuration.php#ini.date.timezone
  17 if (date_default_timezone_get() == '') {
  18     date_default_timezone_set('UTC');
  19 }
  20
  21 /*
  22  * PHP configuration
  23  */
  24
  25 // http://server.com/x/shaarli --> /shaarli/
  26 define('WEB_PATH', substr($_SERVER['REQUEST_URI'], 0, 1+strrpos($_SERVER['REQUEST_URI'], '/', 0)));
  27
  28 // High execution time in case of problematic imports/exports.
  29 ini_set('max_input_time', '60');
  30
  31 // Try to set max upload file size and read
  32 ini_set('memory_limit', '128M');
  33 ini_set('post_max_size', '16M');
  34 ini_set('upload_max_filesize', '16M');
  35
  36 // See all error except warnings
  37 error_reporting(E_ALL^E_WARNING);
  38 // See all errors (for debugging only)
  39 //error_reporting(-1);
  40
  41
  42 // 3rd-party libraries
  43 if (! file_exists(__DIR__ . '/vendor/autoload.php')) {
  44     header('Content-Type: text/plain; charset=utf-8');
  45     echo "Error: missing Composer configuration\n\n"
  46         ."If you installed Shaarli through Git or using the development branch,\n"
  47         ."please refer to the installation documentation to install PHP"
  48         ." dependencies using Composer:\n"
  49         ."- https://shaarli.readthedocs.io/en/master/Server-configuration/\n"
  50         ."- https://shaarli.readthedocs.io/en/master/Download-and-Installation/";
  51     exit;
  52 }
  53 require_once 'inc/rain.tpl.class.php';
  54 require_once __DIR__ . '/vendor/autoload.php';
  55
  56 // Shaarli library
  57 require_once 'application/bookmark/LinkUtils.php';
  58 require_once 'application/config/ConfigPlugin.php';
  59 require_once 'application/feed/Cache.php';
  60 require_once 'application/http/HttpUtils.php';
  61 require_once 'application/http/UrlUtils.php';
  62 require_once 'application/updater/UpdaterUtils.php';
  63 require_once 'application/FileUtils.php';
  64 require_once 'application/TimeZone.php';
  65 require_once 'application/Utils.php';
  66
  67 use \Shaarli\ApplicationUtils;
  68 use \Shaarli\Bookmark\Exception\LinkNotFoundException;
  69 use \Shaarli\Bookmark\LinkDB;
  70 use \Shaarli\Config\ConfigManager;
  71 use \Shaarli\Feed\CachedPage;
  72 use \Shaarli\Feed\FeedBuilder;
  73 use \Shaarli\History;
  74 use \Shaarli\Languages;
  75 use \Shaarli\Netscape\NetscapeBookmarkUtils;
  76 use \Shaarli\Plugin\PluginManager;
  77 use \Shaarli\Render\PageBuilder;
  78 use \Shaarli\Render\ThemeUtils;
  79 use \Shaarli\Router;
  80 use \Shaarli\Security\LoginManager;
  81 use \Shaarli\Security\SessionManager;
  82 use \Shaarli\Thumbnailer;
  83 use \Shaarli\Updater\Updater;
  84
  85 // Ensure the PHP version is supported
  86 try {
  87     ApplicationUtils::checkPHPVersion('7.1', 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, $_SERVER['SERVER_NAME']);
 104 // Set session parameters on server side.
 105 // Use cookies to store session.
 106 ini_set('session.use_cookies', 1);
 107 // Force cookies for session (phpsessionID forbidden in URL).
 108 ini_set('session.use_only_cookies', 1);
 109 // Prevent PHP form using sessionID in URL if cookies are disabled.
 110 ini_set('session.use_trans_sid', false);
 111
 112 session_name('shaarli');
 113 // Start session if needed (Some server auto-start sessions).
 114 if (session_status() == PHP_SESSION_NONE) {
 115     session_start();
 116 }
 117
 118 // Regenerate session ID if invalid or not defined in cookie.
 119 if (isset($_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 $loginManager = new LoginManager($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         } else {
 227             // Standard session expiration (=when browser closes)
 228             $expirationTime = 0;
 229         }
 230
 231         // Send cookie with the new expiration date to the browser
 232         session_set_cookie_params($expirationTime, $cookiedir, $_SERVER['SERVER_NAME']);
 233         session_regenerate_id(true);
 234
 235         // Optional redirect after login:
 236         if (isset($_GET['post'])) {
 237             $uri = '?post='. urlencode($_GET['post']);
 238             foreach (array('description', 'source', 'title', 'tags') as $param) {
 239                 if (!empty($_GET[$param])) {
 240                     $uri .= '&'.$param.'='.urlencode($_GET[$param]);
 241                 }
 242             }
 243             header('Location: '. $uri);
 244             exit;
 245         }
 246
 247         if (isset($_GET['edit_link'])) {
 248             header('Location: ?edit_link='. escape($_GET['edit_link']));
 249             exit;
 250         }
 251
 252         if (isset($_POST['returnurl'])) {
 253             // Prevent loops over login screen.
 254             if (strpos($_POST['returnurl'], 'do=login') === false) {
 255                 header('Location: '. generateLocation($_POST['returnurl'], $_SERVER['HTTP_HOST']));
 256                 exit;
 257             }
 258         }
 259         header('Location: ?');
 260         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'])) {
 282     $_SESSION['tokens']=array();  // Token are attached to the session.
 283 }
 284
 285 /**
 286  * Daily RSS feed: 1 RSS entry per day giving all the links on that day.
 287  * Gives the last 7 days (which have links).
 288  * This RSS feed cannot be filtered.
 289  *
 290  * @param ConfigManager $conf         Configuration Manager instance
 291  * @param LoginManager  $loginManager LoginManager instance
 292  */
 293 function showDailyRSS($conf, $loginManager)
 294 {
 295     // Cache system
 296     $query = $_SERVER['QUERY_STRING'];
 297     $cache = new CachedPage(
 298         $conf->get('config.PAGE_CACHE'),
 299         page_url($_SERVER),
 300         startsWith($query, 'do=dailyrss') && !$loginManager->isLoggedIn()
 301     );
 302     $cached = $cache->cachedVersion();
 303     if (!empty($cached)) {
 304         echo $cached;
 305         exit;
 306     }
 307
 308     // If cached was not found (or not usable), then read the database and build the response:
 309     // Read links from database (and filter private links if used it not logged in).
 310     $LINKSDB = new LinkDB(
 311         $conf->get('resource.datastore'),
 312         $loginManager->isLoggedIn(),
 313         $conf->get('privacy.hide_public_links')
 314     );
 315
 316     /* Some Shaarlies may have very few links, so we need to look
 317        back in time until we have enough days ($nb_of_days).
 318     */
 319     $nb_of_days = 7; // We take 7 days.
 320     $today = date('Ymd');
 321     $days = array();
 322
 323     foreach ($LINKSDB as $link) {
 324         $day = $link['created']->format('Ymd'); // Extract day (without time)
 325         if (strcmp($day, $today) < 0) {
 326             if (empty($days[$day])) {
 327                 $days[$day] = array();
 328             }
 329             $days[$day][] = $link;
 330         }
 331
 332         if (count($days) > $nb_of_days) {
 333             break; // Have we collected enough days?
 334         }
 335     }
 336
 337     // Build the RSS feed.
 338     header('Content-Type: application/rss+xml; charset=utf-8');
 339     $pageaddr = escape(index_url($_SERVER));
 340     echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0">';
 341     echo '<channel>';
 342     echo '<title>Daily - '. $conf->get('general.title') . '</title>';
 343     echo '<link>'. $pageaddr .'</link>';
 344     echo '<description>Daily shared links</description>';
 345     echo '<language>en-en</language>';
 346     echo '<copyright>'. $pageaddr .'</copyright>'. PHP_EOL;
 347
 348     // For each day.
 349     foreach ($days as $day => $links) {
 350         $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 351         $absurl = escape(index_url($_SERVER).'?do=daily&day='.$day);  // Absolute URL of the corresponding "Daily" page.
 352
 353         // We pre-format some fields for proper output.
 354         foreach ($links as &$link) {
 355             $link['formatedDescription'] = format_description($link['description']);
 356             $link['timestamp'] = $link['created']->getTimestamp();
 357             if (is_note($link['url'])) {
 358                 $link['url'] = index_url($_SERVER) . $link['url'];  // make permalink URL absolute
 359             }
 360         }
 361
 362         // Then build the HTML for this day:
 363         $tpl = new RainTPL;
 364         $tpl->assign('title', $conf->get('general.title'));
 365         $tpl->assign('daydate', $dayDate->getTimestamp());
 366         $tpl->assign('absurl', $absurl);
 367         $tpl->assign('links', $links);
 368         $tpl->assign('rssdate', escape($dayDate->format(DateTime::RSS)));
 369         $tpl->assign('hide_timestamps', $conf->get('privacy.hide_timestamps', false));
 370         $tpl->assign('index_url', $pageaddr);
 371         $html = $tpl->draw('dailyrss', true);
 372
 373         echo $html . PHP_EOL;
 374     }
 375     echo '</channel></rss><!-- Cached version of '. escape(page_url($_SERVER)) .' -->';
 376
 377     $cache->cache(ob_get_contents());
 378     ob_end_flush();
 379     exit;
 380 }
 381
 382 /**
 383  * Show the 'Daily' page.
 384  *
 385  * @param PageBuilder   $pageBuilder   Template engine wrapper.
 386  * @param LinkDB        $LINKSDB       LinkDB instance.
 387  * @param ConfigManager $conf          Configuration Manager instance.
 388  * @param PluginManager $pluginManager Plugin Manager instance.
 389  * @param LoginManager  $loginManager  Login Manager instance
 390  */
 391 function showDaily($pageBuilder, $LINKSDB, $conf, $pluginManager, $loginManager)
 392 {
 393     if (isset($_GET['day'])) {
 394         $day = $_GET['day'];
 395         if ($day === date('Ymd', strtotime('now'))) {
 396             $pageBuilder->assign('dayDesc', t('Today'));
 397         } elseif ($day === date('Ymd', strtotime('-1 days'))) {
 398             $pageBuilder->assign('dayDesc', t('Yesterday'));
 399         }
 400     } else {
 401         $day = date('Ymd', strtotime('now')); // Today, in format YYYYMMDD.
 402         $pageBuilder->assign('dayDesc', t('Today'));
 403     }
 404
 405     $days = $LINKSDB->days();
 406     $i = array_search($day, $days);
 407     if ($i === false && count($days)) {
 408         // no links for day, but at least one day with links
 409         $i = count($days) - 1;
 410         $day = $days[$i];
 411     }
 412     $previousday = '';
 413     $nextday = '';
 414
 415     if ($i !== false) {
 416         if ($i >= 1) {
 417              $previousday=$days[$i - 1];
 418         }
 419         if ($i < count($days) - 1) {
 420             $nextday = $days[$i + 1];
 421         }
 422     }
 423     try {
 424         $linksToDisplay = $LINKSDB->filterDay($day);
 425     } catch (Exception $exc) {
 426         error_log($exc);
 427         $linksToDisplay = array();
 428     }
 429
 430     // We pre-format some fields for proper output.
 431     foreach ($linksToDisplay as $key => $link) {
 432         $taglist = explode(' ', $link['tags']);
 433         uasort($taglist, 'strcasecmp');
 434         $linksToDisplay[$key]['taglist']=$taglist;
 435         $linksToDisplay[$key]['formatedDescription'] = format_description($link['description']);
 436         $linksToDisplay[$key]['timestamp'] =  $link['created']->getTimestamp();
 437     }
 438
 439     $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 440     $data = array(
 441         'pagetitle' => $conf->get('general.title') .' - '. format_date($dayDate, false),
 442         'linksToDisplay' => $linksToDisplay,
 443         'day' => $dayDate->getTimestamp(),
 444         'dayDate' => $dayDate,
 445         'previousday' => $previousday,
 446         'nextday' => $nextday,
 447     );
 448
 449     /* Hook is called before column construction so that plugins don't have
 450        to deal with columns. */
 451     $pluginManager->executeHooks('render_daily', $data, array('loggedin' => $loginManager->isLoggedIn()));
 452
 453     /* We need to spread the articles on 3 columns.
 454        I did not want to use a JavaScript lib like http://masonry.desandro.com/
 455        so I manually spread entries with a simple method: I roughly evaluate the
 456        height of a div according to title and description length.
 457     */
 458     $columns = array(array(), array(), array()); // Entries to display, for each column.
 459     $fill = array(0, 0, 0);  // Rough estimate of columns fill.
 460     foreach ($data['linksToDisplay'] as $key => $link) {
 461         // Roughly estimate length of entry (by counting characters)
 462         // Title: 30 chars = 1 line. 1 line is 30 pixels height.
 463         // Description: 836 characters gives roughly 342 pixel height.
 464         // This is not perfect, but it's usually OK.
 465         $length = strlen($link['title']) + (342 * strlen($link['description'])) / 836;
 466         if (! empty($link['thumbnail'])) {
 467             $length += 100; // 1 thumbnails roughly takes 100 pixels height.
 468         }
 469         // Then put in column which is the less filled:
 470         $smallest = min($fill); // find smallest value in array.
 471         $index = array_search($smallest, $fill); // find index of this smallest value.
 472         array_push($columns[$index], $link); // Put entry in this column.
 473         $fill[$index] += $length;
 474     }
 475
 476     $data['cols'] = $columns;
 477
 478     foreach ($data as $key => $value) {
 479         $pageBuilder->assign($key, $value);
 480     }
 481
 482     $pageBuilder->assign('pagetitle', t('Daily') .' - '. $conf->get('general.title', 'Shaarli'));
 483     $pageBuilder->renderPage('daily');
 484     exit;
 485 }
 486
 487 /**
 488  * Renders the linklist
 489  *
 490  * @param pageBuilder   $PAGE    pageBuilder instance.
 491  * @param LinkDB        $LINKSDB LinkDB instance.
 492  * @param ConfigManager $conf    Configuration Manager instance.
 493  * @param PluginManager $pluginManager Plugin Manager instance.
 494  */
 495 function showLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager)
 496 {
 497     buildLinkList($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         $_SESSION
 519     );
 520     try {
 521         $newUpdates = $updater->update();
 522         if (! empty($newUpdates)) {
 523             write_updates_file(
 524                 $conf->get('resource.updates'),
 525                 $updater->getDoneUpdates()
 526             );
 527         }
 528     } catch (Exception $e) {
 529         die($e->getMessage());
 530     }
 531
 532     $PAGE = new PageBuilder($conf, $_SESSION, $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, $loginManager->isLoggedIn());
 540
 541     if (// if the user isn't logged in
 542         !$loginManager->isLoggedIn() &&
 543         // and Shaarli doesn't have public content...
 544         $conf->get('privacy.hide_public_links') &&
 545         // and is configured to enforce the login
 546         $conf->get('privacy.force_login') &&
 547         // and the current page isn't already the login page
 548         $targetPage !== Router::$PAGE_LOGIN &&
 549         // and the user is not requesting a feed (which would lead to a different content-type as expected)
 550         $targetPage !== Router::$PAGE_FEED_ATOM &&
 551         $targetPage !== Router::$PAGE_FEED_RSS
 552     ) {
 553         // force current page to be the login page
 554         $targetPage = Router::$PAGE_LOGIN;
 555     }
 556
 557     // Call plugin hooks for header, footer and includes, specifying which page will be rendered.
 558     // Then assign generated data to RainTPL.
 559     $common_hooks = array(
 560         'includes',
 561         'header',
 562         'footer',
 563     );
 564
 565     foreach ($common_hooks as $name) {
 566         $plugin_data = array();
 567         $pluginManager->executeHooks(
 568             'render_' . $name,
 569             $plugin_data,
 570             array(
 571                 'target' => $targetPage,
 572                 'loggedin' => $loginManager->isLoggedIn()
 573             )
 574         );
 575         $PAGE->assign('plugins_' . $name, $plugin_data);
 576     }
 577
 578     // -------- Display login form.
 579     if ($targetPage == Router::$PAGE_LOGIN) {
 580         if ($conf->get('security.open_shaarli')) {
 581             header('Location: ?');
 582             exit;
 583         }  // No need to login for open Shaarli
 584         if (isset($_GET['username'])) {
 585             $PAGE->assign('username', escape($_GET['username']));
 586         }
 587         $PAGE->assign('returnurl', (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']):''));
 588         // add default state of the 'remember me' checkbox
 589         $PAGE->assign('remember_user_default', $conf->get('privacy.remember_user_default'));
 590         $PAGE->assign('user_can_login', $loginManager->canLogin($_SERVER));
 591         $PAGE->assign('pagetitle', t('Login') .' - '. $conf->get('general.title', 'Shaarli'));
 592         $PAGE->renderPage('loginform');
 593         exit;
 594     }
 595     // -------- User wants to logout.
 596     if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=logout')) {
 597         invalidateCaches($conf->get('resource.page_cache'));
 598         $sessionManager->logout();
 599         setcookie(LoginManager::$STAY_SIGNED_IN_COOKIE, 'false', 0, WEB_PATH);
 600         header('Location: ?');
 601         exit;
 602     }
 603
 604     // -------- Picture wall
 605     if ($targetPage == Router::$PAGE_PICWALL) {
 606         $PAGE->assign('pagetitle', t('Picture wall') .' - '. $conf->get('general.title', 'Shaarli'));
 607         if (! $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE) === Thumbnailer::MODE_NONE) {
 608             $PAGE->assign('linksToDisplay', []);
 609             $PAGE->renderPage('picwall');
 610             exit;
 611         }
 612
 613         // Optionally filter the results:
 614         $links = $LINKSDB->filterSearch($_GET);
 615         $linksToDisplay = array();
 616
 617         // Get only links which have a thumbnail.
 618         // Note: we do not retrieve thumbnails here, the request is too heavy.
 619         foreach ($links as $key => $link) {
 620             if (isset($link['thumbnail']) && $link['thumbnail'] !== false) {
 621                 $linksToDisplay[] = $link; // Add to array.
 622             }
 623         }
 624
 625         $data = array(
 626             'linksToDisplay' => $linksToDisplay,
 627         );
 628         $pluginManager->executeHooks('render_picwall', $data, array('loggedin' => $loginManager->isLoggedIn()));
 629
 630         foreach ($data as $key => $value) {
 631             $PAGE->assign($key, $value);
 632         }
 633
 634
 635         $PAGE->renderPage('picwall');
 636         exit;
 637     }
 638
 639     // -------- Tag cloud
 640     if ($targetPage == Router::$PAGE_TAGCLOUD) {
 641         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
 642         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 643         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 644
 645         // We sort tags alphabetically, then choose a font size according to count.
 646         // First, find max value.
 647         $maxcount = 0;
 648         foreach ($tags as $value) {
 649             $maxcount = max($maxcount, $value);
 650         }
 651
 652         alphabetical_sort($tags, false, true);
 653
 654         $tagList = array();
 655         foreach ($tags as $key => $value) {
 656             if (in_array($key, $filteringTags)) {
 657                 continue;
 658             }
 659             // Tag font size scaling:
 660             //   default 15 and 30 logarithm bases affect scaling,
 661             //   22 and 6 are arbitrary font sizes for max and min sizes.
 662             $size = log($value, 15) / log($maxcount, 30) * 2.2 + 0.8;
 663             $tagList[$key] = array(
 664                 'count' => $value,
 665                 'size' => number_format($size, 2, '.', ''),
 666             );
 667         }
 668
 669         $searchTags = implode(' ', escape($filteringTags));
 670         $data = array(
 671             'search_tags' => $searchTags,
 672             'tags' => $tagList,
 673         );
 674         $pluginManager->executeHooks('render_tagcloud', $data, array('loggedin' => $loginManager->isLoggedIn()));
 675
 676         foreach ($data as $key => $value) {
 677             $PAGE->assign($key, $value);
 678         }
 679
 680         $searchTags = ! empty($searchTags) ? $searchTags .' - ' : '';
 681         $PAGE->assign('pagetitle', $searchTags. t('Tag cloud') .' - '. $conf->get('general.title', 'Shaarli'));
 682         $PAGE->renderPage('tag.cloud');
 683         exit;
 684     }
 685
 686     // -------- Tag list
 687     if ($targetPage == Router::$PAGE_TAGLIST) {
 688         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
 689         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 690         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 691         foreach ($filteringTags as $tag) {
 692             if (array_key_exists($tag, $tags)) {
 693                 unset($tags[$tag]);
 694             }
 695         }
 696
 697         if (! empty($_GET['sort']) && $_GET['sort'] === 'alpha') {
 698             alphabetical_sort($tags, false, true);
 699         }
 700
 701         $searchTags = implode(' ', escape($filteringTags));
 702         $data = [
 703             'search_tags' => $searchTags,
 704             'tags' => $tags,
 705         ];
 706         $pluginManager->executeHooks('render_taglist', $data, ['loggedin' => $loginManager->isLoggedIn()]);
 707
 708         foreach ($data as $key => $value) {
 709             $PAGE->assign($key, $value);
 710         }
 711
 712         $searchTags = ! empty($searchTags) ? $searchTags .' - ' : '';
 713         $PAGE->assign('pagetitle', $searchTags . t('Tag list') .' - '. $conf->get('general.title', 'Shaarli'));
 714         $PAGE->renderPage('tag.list');
 715         exit;
 716     }
 717
 718     // Daily page.
 719     if ($targetPage == Router::$PAGE_DAILY) {
 720         showDaily($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
 721     }
 722
 723     // ATOM and RSS feed.
 724     if ($targetPage == Router::$PAGE_FEED_ATOM || $targetPage == Router::$PAGE_FEED_RSS) {
 725         $feedType = $targetPage == Router::$PAGE_FEED_RSS ? FeedBuilder::$FEED_RSS : FeedBuilder::$FEED_ATOM;
 726         header('Content-Type: application/'. $feedType .'+xml; charset=utf-8');
 727
 728         // Cache system
 729         $query = $_SERVER['QUERY_STRING'];
 730         $cache = new CachedPage(
 731             $conf->get('resource.page_cache'),
 732             page_url($_SERVER),
 733             startsWith($query, 'do='. $targetPage) && !$loginManager->isLoggedIn()
 734         );
 735         $cached = $cache->cachedVersion();
 736         if (!empty($cached)) {
 737             echo $cached;
 738             exit;
 739         }
 740
 741         // Generate data.
 742         $feedGenerator = new FeedBuilder($LINKSDB, $feedType, $_SERVER, $_GET, $loginManager->isLoggedIn());
 743         $feedGenerator->setLocale(strtolower(setlocale(LC_COLLATE, 0)));
 744         $feedGenerator->setHideDates($conf->get('privacy.hide_timestamps') && !$loginManager->isLoggedIn());
 745         $feedGenerator->setUsePermalinks(isset($_GET['permalinks']) || !$conf->get('feed.rss_permalinks'));
 746         $data = $feedGenerator->buildData();
 747
 748         // Process plugin hook.
 749         $pluginManager->executeHooks('render_feed', $data, array(
 750             'loggedin' => $loginManager->isLoggedIn(),
 751             'target' => $targetPage,
 752         ));
 753
 754         // Render the template.
 755         $PAGE->assignAll($data);
 756         $PAGE->renderPage('feed.'. $feedType);
 757         $cache->cache(ob_get_contents());
 758         ob_end_flush();
 759         exit;
 760     }
 761
 762     // Display opensearch plugin (XML)
 763     if ($targetPage == Router::$PAGE_OPENSEARCH) {
 764         header('Content-Type: application/xml; charset=utf-8');
 765         $PAGE->assign('serverurl', index_url($_SERVER));
 766         $PAGE->renderPage('opensearch');
 767         exit;
 768     }
 769
 770     // -------- User clicks on a tag in a link: The tag is added to the list of searched tags (searchtags=...)
 771     if (isset($_GET['addtag'])) {
 772         // Get previous URL (http_referer) and add the tag to the searchtags parameters in query.
 773         if (empty($_SERVER['HTTP_REFERER'])) {
 774             // In case browser does not send HTTP_REFERER
 775             header('Location: ?searchtags='.urlencode($_GET['addtag']));
 776             exit;
 777         }
 778         parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $params);
 779
 780         // Prevent redirection loop
 781         if (isset($params['addtag'])) {
 782             unset($params['addtag']);
 783         }
 784
 785         // Check if this tag is already in the search query and ignore it if it is.
 786         // Each tag is always separated by a space
 787         if (isset($params['searchtags'])) {
 788             $current_tags = explode(' ', $params['searchtags']);
 789         } else {
 790             $current_tags = array();
 791         }
 792         $addtag = true;
 793         foreach ($current_tags as $value) {
 794             if ($value === $_GET['addtag']) {
 795                 $addtag = false;
 796                 break;
 797             }
 798         }
 799         // Append the tag if necessary
 800         if (empty($params['searchtags'])) {
 801             $params['searchtags'] = trim($_GET['addtag']);
 802         } elseif ($addtag) {
 803             $params['searchtags'] = trim($params['searchtags']).' '.trim($_GET['addtag']);
 804         }
 805
 806         // We also remove page (keeping the same page has no sense, since the
 807         // results are different)
 808         unset($params['page']);
 809
 810         header('Location: ?'.http_build_query($params));
 811         exit;
 812     }
 813
 814     // -------- User clicks on a tag in result count: Remove the tag from the list of searched tags (searchtags=...)
 815     if (isset($_GET['removetag'])) {
 816         // Get previous URL (http_referer) and remove the tag from the searchtags parameters in query.
 817         if (empty($_SERVER['HTTP_REFERER'])) {
 818             header('Location: ?');
 819             exit;
 820         }
 821
 822         // In case browser does not send HTTP_REFERER
 823         parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $params);
 824
 825         // Prevent redirection loop
 826         if (isset($params['removetag'])) {
 827             unset($params['removetag']);
 828         }
 829
 830         if (isset($params['searchtags'])) {
 831             $tags = explode(' ', $params['searchtags']);
 832             // Remove value from array $tags.
 833             $tags = array_diff($tags, array($_GET['removetag']));
 834             $params['searchtags'] = implode(' ', $tags);
 835
 836             if (empty($params['searchtags'])) {
 837                 unset($params['searchtags']);
 838             }
 839
 840             // We also remove page (keeping the same page has no sense, since
 841             // the results are different)
 842             unset($params['page']);
 843         }
 844         header('Location: ?'.http_build_query($params));
 845         exit;
 846     }
 847
 848     // -------- User wants to change the number of links per page (linksperpage=...)
 849     if (isset($_GET['linksperpage'])) {
 850         if (is_numeric($_GET['linksperpage'])) {
 851             $_SESSION['LINKS_PER_PAGE']=abs(intval($_GET['linksperpage']));
 852         }
 853
 854         if (! empty($_SERVER['HTTP_REFERER'])) {
 855             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('linksperpage'));
 856         } else {
 857             $location = '?';
 858         }
 859         header('Location: '. $location);
 860         exit;
 861     }
 862
 863     // -------- User wants to see only private links (toggle)
 864     if (isset($_GET['visibility'])) {
 865         if ($_GET['visibility'] === 'private') {
 866             // Visibility not set or not already private, set private, otherwise reset it
 867             if (empty($_SESSION['visibility']) || $_SESSION['visibility'] !== 'private') {
 868                 // See only private links
 869                 $_SESSION['visibility'] = 'private';
 870             } else {
 871                 unset($_SESSION['visibility']);
 872             }
 873         } elseif ($_GET['visibility'] === 'public') {
 874             if (empty($_SESSION['visibility']) || $_SESSION['visibility'] !== 'public') {
 875                 // See only public links
 876                 $_SESSION['visibility'] = 'public';
 877             } else {
 878                 unset($_SESSION['visibility']);
 879             }
 880         }
 881
 882         if (! empty($_SERVER['HTTP_REFERER'])) {
 883             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('visibility'));
 884         } else {
 885             $location = '?';
 886         }
 887         header('Location: '. $location);
 888         exit;
 889     }
 890
 891     // -------- User wants to see only untagged links (toggle)
 892     if (isset($_GET['untaggedonly'])) {
 893         $_SESSION['untaggedonly'] = empty($_SESSION['untaggedonly']);
 894
 895         if (! empty($_SERVER['HTTP_REFERER'])) {
 896             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('untaggedonly'));
 897         } else {
 898             $location = '?';
 899         }
 900         header('Location: '. $location);
 901         exit;
 902     }
 903
 904     // -------- Handle other actions allowed for non-logged in users:
 905     if (!$loginManager->isLoggedIn()) {
 906         // User tries to post new link but is not logged in:
 907         // Show login screen, then redirect to ?post=...
 908         if (isset($_GET['post'])) {
 909             header( // Redirect to login page, then back to post link.
 910                 'Location: ?do=login&post='.urlencode($_GET['post']).
 911                 (!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').
 912                 (!empty($_GET['description'])?'&description='.urlencode($_GET['description']):'').
 913                 (!empty($_GET['tags'])?'&tags='.urlencode($_GET['tags']):'').
 914                 (!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')
 915             );
 916             exit;
 917         }
 918
 919         showLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
 920         if (isset($_GET['edit_link'])) {
 921             header('Location: ?do=login&edit_link='. escape($_GET['edit_link']));
 922             exit;
 923         }
 924
 925         exit; // Never remove this one! All operations below are reserved for logged in user.
 926     }
 927
 928     // -------- All other functions are reserved for the registered user:
 929
 930     // -------- Display the Tools menu if requested (import/export/bookmarklet...)
 931     if ($targetPage == Router::$PAGE_TOOLS) {
 932         $data = [
 933             'pageabsaddr' => index_url($_SERVER),
 934             'sslenabled' => is_https($_SERVER),
 935         ];
 936         $pluginManager->executeHooks('render_tools', $data);
 937
 938         foreach ($data as $key => $value) {
 939             $PAGE->assign($key, $value);
 940         }
 941
 942         $PAGE->assign('pagetitle', t('Tools') .' - '. $conf->get('general.title', 'Shaarli'));
 943         $PAGE->renderPage('tools');
 944         exit;
 945     }
 946
 947     // -------- User wants to change his/her password.
 948     if ($targetPage == Router::$PAGE_CHANGEPASSWORD) {
 949         if ($conf->get('security.open_shaarli')) {
 950             die(t('You are not supposed to change a password on an Open Shaarli.'));
 951         }
 952
 953         if (!empty($_POST['setpassword']) && !empty($_POST['oldpassword'])) {
 954             if (!$sessionManager->checkToken($_POST['token'])) {
 955                 die(t('Wrong token.')); // Go away!
 956             }
 957
 958             // Make sure old password is correct.
 959             $oldhash = sha1(
 960                 $_POST['oldpassword'].$conf->get('credentials.login').$conf->get('credentials.salt')
 961             );
 962             if ($oldhash != $conf->get('credentials.hash')) {
 963                 echo '<script>alert("'
 964                     . t('The old password is not correct.')
 965                     .'");document.location=\'?do=changepasswd\';</script>';
 966                 exit;
 967             }
 968             // Save new password
 969             // Salt renders rainbow-tables attacks useless.
 970             $conf->set('credentials.salt', sha1(uniqid('', true) .'_'. mt_rand()));
 971             $conf->set(
 972                 'credentials.hash',
 973                 sha1(
 974                     $_POST['setpassword']
 975                     . $conf->get('credentials.login')
 976                     . $conf->get('credentials.salt')
 977                 )
 978             );
 979             try {
 980                 $conf->write($loginManager->isLoggedIn());
 981             } catch (Exception $e) {
 982                 error_log(
 983                     'ERROR while writing config file after changing password.' . PHP_EOL .
 984                     $e->getMessage()
 985                 );
 986
 987                 // TODO: do not handle exceptions/errors in JS.
 988                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=tools\';</script>';
 989                 exit;
 990             }
 991             echo '<script>alert("'. t('Your password has been changed') .'");document.location=\'?do=tools\';</script>';
 992             exit;
 993         } else {
 994             // show the change password form.
 995             $PAGE->assign('pagetitle', t('Change password') .' - '. $conf->get('general.title', 'Shaarli'));
 996             $PAGE->renderPage('changepassword');
 997             exit;
 998         }
 999     }
1000
1001     // -------- User wants to change configuration
1002     if ($targetPage == Router::$PAGE_CONFIGURE) {
1003         if (!empty($_POST['title'])) {
1004             if (!$sessionManager->checkToken($_POST['token'])) {
1005                 die(t('Wrong token.')); // Go away!
1006             }
1007             $tz = 'UTC';
1008             if (!empty($_POST['continent']) && !empty($_POST['city'])
1009                 && isTimeZoneValid($_POST['continent'], $_POST['city'])
1010             ) {
1011                 $tz = $_POST['continent'] . '/' . $_POST['city'];
1012             }
1013             $conf->set('general.timezone', $tz);
1014             $conf->set('general.title', escape($_POST['title']));
1015             $conf->set('general.header_link', escape($_POST['titleLink']));
1016             $conf->set('general.retrieve_description', !empty($_POST['retrieveDescription']));
1017             $conf->set('resource.theme', escape($_POST['theme']));
1018             $conf->set('security.session_protection_disabled', !empty($_POST['disablesessionprotection']));
1019             $conf->set('privacy.default_private_links', !empty($_POST['privateLinkByDefault']));
1020             $conf->set('feed.rss_permalinks', !empty($_POST['enableRssPermalinks']));
1021             $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1022             $conf->set('privacy.hide_public_links', !empty($_POST['hidePublicLinks']));
1023             $conf->set('api.enabled', !empty($_POST['enableApi']));
1024             $conf->set('api.secret', escape($_POST['apiSecret']));
1025             $conf->set('translation.language', escape($_POST['language']));
1026
1027             $thumbnailsMode = extension_loaded('gd') ? $_POST['enableThumbnails'] : Thumbnailer::MODE_NONE;
1028             if ($thumbnailsMode !== Thumbnailer::MODE_NONE
1029                 && $thumbnailsMode !== $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE)
1030             ) {
1031                 $_SESSION['warnings'][] = t(
1032                     'You have enabled or changed thumbnails mode. '
1033                     .'<a href="?do=thumbs_update">Please synchronize them</a>.'
1034                 );
1035             }
1036             $conf->set('thumbnails.mode', $thumbnailsMode);
1037
1038             try {
1039                 $conf->write($loginManager->isLoggedIn());
1040                 $history->updateSettings();
1041                 invalidateCaches($conf->get('resource.page_cache'));
1042             } catch (Exception $e) {
1043                 error_log(
1044                     'ERROR while writing config file after configuration update.' . PHP_EOL .
1045                     $e->getMessage()
1046                 );
1047
1048                 // TODO: do not handle exceptions/errors in JS.
1049                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=configure\';</script>';
1050                 exit;
1051             }
1052             echo '<script>alert("'. t('Configuration was saved.') .'");document.location=\'?do=configure\';</script>';
1053             exit;
1054         } else {
1055             // Show the configuration form.
1056             $PAGE->assign('title', $conf->get('general.title'));
1057             $PAGE->assign('theme', $conf->get('resource.theme'));
1058             $PAGE->assign('theme_available', ThemeUtils::getThemes($conf->get('resource.raintpl_tpl')));
1059             list($continents, $cities) = generateTimeZoneData(
1060                 timezone_identifiers_list(),
1061                 $conf->get('general.timezone')
1062             );
1063             $PAGE->assign('continents', $continents);
1064             $PAGE->assign('cities', $cities);
1065             $PAGE->assign('retrieve_description', $conf->get('general.retrieve_description'));
1066             $PAGE->assign('private_links_default', $conf->get('privacy.default_private_links', false));
1067             $PAGE->assign('session_protection_disabled', $conf->get('security.session_protection_disabled', false));
1068             $PAGE->assign('enable_rss_permalinks', $conf->get('feed.rss_permalinks', false));
1069             $PAGE->assign('enable_update_check', $conf->get('updates.check_updates', true));
1070             $PAGE->assign('hide_public_links', $conf->get('privacy.hide_public_links', false));
1071             $PAGE->assign('api_enabled', $conf->get('api.enabled', true));
1072             $PAGE->assign('api_secret', $conf->get('api.secret'));
1073             $PAGE->assign('languages', Languages::getAvailableLanguages());
1074             $PAGE->assign('gd_enabled', extension_loaded('gd'));
1075             $PAGE->assign('thumbnails_mode', $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE));
1076             $PAGE->assign('pagetitle', t('Configure') .' - '. $conf->get('general.title', 'Shaarli'));
1077             $PAGE->renderPage('configure');
1078             exit;
1079         }
1080     }
1081
1082     // -------- User wants to rename a tag or delete it
1083     if ($targetPage == Router::$PAGE_CHANGETAG) {
1084         if (empty($_POST['fromtag']) || (empty($_POST['totag']) && isset($_POST['renametag']))) {
1085             $PAGE->assign('fromtag', ! empty($_GET['fromtag']) ? escape($_GET['fromtag']) : '');
1086             $PAGE->assign('pagetitle', t('Manage tags') .' - '. $conf->get('general.title', 'Shaarli'));
1087             $PAGE->renderPage('changetag');
1088             exit;
1089         }
1090
1091         if (!$sessionManager->checkToken($_POST['token'])) {
1092             die(t('Wrong token.'));
1093         }
1094
1095         $toTag = isset($_POST['totag']) ? escape($_POST['totag']) : null;
1096         $alteredLinks = $LINKSDB->renameTag(escape($_POST['fromtag']), $toTag);
1097         $LINKSDB->save($conf->get('resource.page_cache'));
1098         foreach ($alteredLinks as $link) {
1099             $history->updateLink($link);
1100         }
1101         $delete = empty($_POST['totag']);
1102         $redirect = $delete ? 'do=changetag' : 'searchtags='. urlencode(escape($_POST['totag']));
1103         $count = count($alteredLinks);
1104         $alert = $delete
1105             ? sprintf(t('The tag was removed from %d link.', 'The tag was removed from %d links.', $count), $count)
1106             : sprintf(t('The tag was renamed in %d link.', 'The tag was renamed in %d links.', $count), $count);
1107         echo '<script>alert("'. $alert .'");document.location=\'?'. $redirect .'\';</script>';
1108         exit;
1109     }
1110
1111     // -------- User wants to add a link without using the bookmarklet: Show form.
1112     if ($targetPage == Router::$PAGE_ADDLINK) {
1113         $PAGE->assign('pagetitle', t('Shaare a new link') .' - '. $conf->get('general.title', 'Shaarli'));
1114         $PAGE->renderPage('addlink');
1115         exit;
1116     }
1117
1118     // -------- User clicked the "Save" button when editing a link: Save link to database.
1119     if (isset($_POST['save_edit'])) {
1120         // Go away!
1121         if (! $sessionManager->checkToken($_POST['token'])) {
1122             die(t('Wrong token.'));
1123         }
1124
1125         // lf_id should only be present if the link exists.
1126         $id = isset($_POST['lf_id']) ? intval(escape($_POST['lf_id'])) : $LINKSDB->getNextId();
1127         $link['id'] = $id;
1128         // Linkdate is kept here to:
1129         //   - use the same permalink for notes as they're displayed when creating them
1130         //   - let users hack creation date of their posts
1131         //     See: https://shaarli.readthedocs.io/en/master/guides/various-hacks/#changing-the-timestamp-for-a-shaare
1132         $linkdate = escape($_POST['lf_linkdate']);
1133         $link['created'] = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1134         if (isset($LINKSDB[$id])) {
1135             // Edit
1136             $link['updated'] = new DateTime();
1137             $link['shorturl'] = $LINKSDB[$id]['shorturl'];
1138             $link['sticky'] = isset($LINKSDB[$id]['sticky']) ? $LINKSDB[$id]['sticky'] : false;
1139             $new = false;
1140         } else {
1141             // New link
1142             $link['updated'] = null;
1143             $link['shorturl'] = link_small_hash($link['created'], $id);
1144             $link['sticky'] = false;
1145             $new = true;
1146         }
1147
1148         // Remove multiple spaces.
1149         $tags = trim(preg_replace('/\s\s+/', ' ', $_POST['lf_tags']));
1150         // Remove first '-' char in tags.
1151         $tags = preg_replace('/(^| )\-/', '$1', $tags);
1152         // Remove duplicates.
1153         $tags = implode(' ', array_unique(explode(' ', $tags)));
1154
1155         if (empty(trim($_POST['lf_url']))) {
1156             $_POST['lf_url'] = '?' . smallHash($linkdate . $id);
1157         }
1158         $url = whitelist_protocols(trim($_POST['lf_url']), $conf->get('security.allowed_protocols'));
1159
1160         $link = array_merge($link, [
1161             'title' => trim($_POST['lf_title']),
1162             'url' => $url,
1163             'description' => $_POST['lf_description'],
1164             'private' => (isset($_POST['lf_private']) ? 1 : 0),
1165             'tags' => str_replace(',', ' ', $tags),
1166         ]);
1167
1168         // If title is empty, use the URL as title.
1169         if ($link['title'] == '') {
1170             $link['title'] = $link['url'];
1171         }
1172
1173         if ($conf->get('thumbnails.mode', Thumbnailer::MODE_NONE) !== Thumbnailer::MODE_NONE
1174             && ! is_note($link['url'])
1175         ) {
1176             $thumbnailer = new Thumbnailer($conf);
1177             $link['thumbnail'] = $thumbnailer->get($url);
1178         }
1179
1180         $pluginManager->executeHooks('save_link', $link);
1181
1182         $LINKSDB[$id] = $link;
1183         $LINKSDB->save($conf->get('resource.page_cache'));
1184         if ($new) {
1185             $history->addLink($link);
1186         } else {
1187             $history->updateLink($link);
1188         }
1189
1190         // If we are called from the bookmarklet, we must close the popup:
1191         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1192             echo '<script>self.close();</script>';
1193             exit;
1194         }
1195
1196         $returnurl = !empty($_POST['returnurl']) ? $_POST['returnurl'] : '?';
1197         $location = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1198         // Scroll to the link which has been edited.
1199         $location .= '#' . $link['shorturl'];
1200         // After saving the link, redirect to the page the user was on.
1201         header('Location: '. $location);
1202         exit;
1203     }
1204
1205     // -------- User clicked the "Cancel" button when editing a link.
1206     if (isset($_POST['cancel_edit'])) {
1207         $id = isset($_POST['lf_id']) ? (int) escape($_POST['lf_id']) : false;
1208         if (! isset($LINKSDB[$id])) {
1209             header('Location: ?');
1210         }
1211         // If we are called from the bookmarklet, we must close the popup:
1212         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1213             echo '<script>self.close();</script>';
1214             exit;
1215         }
1216         $link = $LINKSDB[$id];
1217         $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
1218         // Scroll to the link which has been edited.
1219         $returnurl .= '#'. $link['shorturl'];
1220         $returnurl = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1221         header('Location: '.$returnurl); // After canceling, redirect to the page the user was on.
1222         exit;
1223     }
1224
1225     // -------- User clicked the "Delete" button when editing a link: Delete link from database.
1226     if ($targetPage == Router::$PAGE_DELETELINK) {
1227         if (! $sessionManager->checkToken($_GET['token'])) {
1228             die(t('Wrong token.'));
1229         }
1230
1231         $ids = trim($_GET['lf_linkdate']);
1232         if (strpos($ids, ' ') !== false) {
1233             // multiple, space-separated ids provided
1234             $ids = array_values(array_filter(preg_split('/\s+/', escape($ids))));
1235         } else {
1236             // only a single id provided
1237             $ids = [$ids];
1238         }
1239         // assert at least one id is given
1240         if (!count($ids)) {
1241             die('no id provided');
1242         }
1243         foreach ($ids as $id) {
1244             $id = (int) escape($id);
1245             $link = $LINKSDB[$id];
1246             $pluginManager->executeHooks('delete_link', $link);
1247             $history->deleteLink($link);
1248             unset($LINKSDB[$id]);
1249         }
1250         $LINKSDB->save($conf->get('resource.page_cache')); // save to disk
1251
1252         // If we are called from the bookmarklet, we must close the popup:
1253         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1254             echo '<script>self.close();</script>';
1255             exit;
1256         }
1257
1258         $location = '?';
1259         if (isset($_SERVER['HTTP_REFERER'])) {
1260             // Don't redirect to where we were previously if it was a permalink or an edit_link, because it would 404.
1261             $location = generateLocation(
1262                 $_SERVER['HTTP_REFERER'],
1263                 $_SERVER['HTTP_HOST'],
1264                 ['delete_link', 'edit_link', $link['shorturl']]
1265             );
1266         }
1267
1268         header('Location: ' . $location); // After deleting the link, redirect to appropriate location
1269         exit;
1270     }
1271
1272     // -------- User clicked either "Set public" or "Set private" bulk operation
1273     if ($targetPage == Router::$PAGE_CHANGE_VISIBILITY) {
1274         if (! $sessionManager->checkToken($_GET['token'])) {
1275             die(t('Wrong token.'));
1276         }
1277
1278         $ids = trim($_GET['ids']);
1279         if (strpos($ids, ' ') !== false) {
1280             // multiple, space-separated ids provided
1281             $ids = array_values(array_filter(preg_split('/\s+/', escape($ids))));
1282         } else {
1283             // only a single id provided
1284             $ids = [$ids];
1285         }
1286
1287         // assert at least one id is given
1288         if (!count($ids)) {
1289             die('no id provided');
1290         }
1291         // assert that the visibility is valid
1292         if (!isset($_GET['newVisibility']) || !in_array($_GET['newVisibility'], ['public', 'private'])) {
1293             die('invalid visibility');
1294         } else {
1295             $private = $_GET['newVisibility'] === 'private';
1296         }
1297         foreach ($ids as $id) {
1298             $id = (int) escape($id);
1299             $link = $LINKSDB[$id];
1300             $link['private'] = $private;
1301             $pluginManager->executeHooks('save_link', $link);
1302             $LINKSDB[$id] = $link;
1303         }
1304         $LINKSDB->save($conf->get('resource.page_cache')); // save to disk
1305
1306         $location = '?';
1307         if (isset($_SERVER['HTTP_REFERER'])) {
1308             $location = generateLocation(
1309                 $_SERVER['HTTP_REFERER'],
1310                 $_SERVER['HTTP_HOST']
1311             );
1312         }
1313         header('Location: ' . $location); // After deleting the link, redirect to appropriate location
1314         exit;
1315     }
1316
1317     // -------- User clicked the "EDIT" button on a link: Display link edit form.
1318     if (isset($_GET['edit_link'])) {
1319         $id = (int) escape($_GET['edit_link']);
1320         $link = $LINKSDB[$id];  // Read database
1321         if (!$link) {
1322             header('Location: ?');
1323             exit;
1324         } // Link not found in database.
1325         $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1326         $data = array(
1327             'link' => $link,
1328             'link_is_new' => false,
1329             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1330             'tags' => $LINKSDB->linksCountPerTag(),
1331         );
1332         $pluginManager->executeHooks('render_editlink', $data);
1333
1334         foreach ($data as $key => $value) {
1335             $PAGE->assign($key, $value);
1336         }
1337
1338         $PAGE->assign('pagetitle', t('Edit') .' '. t('Shaare') .' - '. $conf->get('general.title', 'Shaarli'));
1339         $PAGE->renderPage('editlink');
1340         exit;
1341     }
1342
1343     // -------- User want to post a new link: Display link edit form.
1344     if (isset($_GET['post'])) {
1345         $url = cleanup_url($_GET['post']);
1346
1347         $link_is_new = false;
1348         // Check if URL is not already in database (in this case, we will edit the existing link)
1349         $link = $LINKSDB->getLinkFromUrl($url);
1350         if (! $link) {
1351             $link_is_new = true;
1352             $linkdate = strval(date(LinkDB::LINK_DATE_FORMAT));
1353             // Get title if it was provided in URL (by the bookmarklet).
1354             $title = empty($_GET['title']) ? '' : escape($_GET['title']);
1355             // Get description if it was provided in URL (by the bookmarklet). [Bronco added that]
1356             $description = empty($_GET['description']) ? '' : escape($_GET['description']);
1357             $tags = empty($_GET['tags']) ? '' : escape($_GET['tags']);
1358             $private = !empty($_GET['private']) && $_GET['private'] === "1" ? 1 : 0;
1359
1360             // If this is an HTTP(S) link, we try go get the page to extract
1361             // the title (otherwise we will to straight to the edit form.)
1362             if (empty($title) && strpos(get_url_scheme($url), 'http') !== false) {
1363                 $retrieveDescription = $conf->get('general.retrieve_description');
1364                 // Short timeout to keep the application responsive
1365                 // The callback will fill $charset and $title with data from the downloaded page.
1366                 get_http_response(
1367                     $url,
1368                     $conf->get('general.download_timeout', 30),
1369                     $conf->get('general.download_max_size', 4194304),
1370                     get_curl_download_callback($charset, $title, $description, $tags, $retrieveDescription)
1371                 );
1372                 if (! empty($title) && strtolower($charset) != 'utf-8') {
1373                     $title = mb_convert_encoding($title, 'utf-8', $charset);
1374                 }
1375             }
1376
1377             if ($url == '') {
1378                 $url = '?' . smallHash($linkdate . $LINKSDB->getNextId());
1379                 $title = $conf->get('general.default_note_title', t('Note: '));
1380             }
1381             $url = escape($url);
1382             $title = escape($title);
1383
1384             $link = array(
1385                 'linkdate' => $linkdate,
1386                 'title' => $title,
1387                 'url' => $url,
1388                 'description' => $description,
1389                 'tags' => $tags,
1390                 'private' => $private,
1391             );
1392         } else {
1393             $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1394         }
1395
1396         $data = array(
1397             'link' => $link,
1398             'link_is_new' => $link_is_new,
1399             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1400             'source' => (isset($_GET['source']) ? $_GET['source'] : ''),
1401             'tags' => $LINKSDB->linksCountPerTag(),
1402             'default_private_links' => $conf->get('privacy.default_private_links', false),
1403         );
1404         $pluginManager->executeHooks('render_editlink', $data);
1405
1406         foreach ($data as $key => $value) {
1407             $PAGE->assign($key, $value);
1408         }
1409
1410         $PAGE->assign('pagetitle', t('Shaare') .' - '. $conf->get('general.title', 'Shaarli'));
1411         $PAGE->renderPage('editlink');
1412         exit;
1413     }
1414
1415     if ($targetPage == Router::$PAGE_PINLINK) {
1416         if (! isset($_GET['id']) || empty($LINKSDB[$_GET['id']])) {
1417             // FIXME! Use a proper error system.
1418             $msg = t('Invalid link ID provided');
1419             echo '<script>alert("'. $msg .'");document.location=\''. index_url($_SERVER) .'\';</script>';
1420             exit;
1421         }
1422         if (! $sessionManager->checkToken($_GET['token'])) {
1423             die('Wrong token.');
1424         }
1425
1426         $link = $LINKSDB[$_GET['id']];
1427         $link['sticky'] = ! $link['sticky'];
1428         $LINKSDB[(int) $_GET['id']] = $link;
1429         $LINKSDB->save($conf->get('resource.page_cache'));
1430         header('Location: '.index_url($_SERVER));
1431         exit;
1432     }
1433
1434     if ($targetPage == Router::$PAGE_EXPORT) {
1435         // Export links as a Netscape Bookmarks file
1436
1437         if (empty($_GET['selection'])) {
1438             $PAGE->assign('pagetitle', t('Export') .' - '. $conf->get('general.title', 'Shaarli'));
1439             $PAGE->renderPage('export');
1440             exit;
1441         }
1442
1443         // export as bookmarks_(all|private|public)_YYYYmmdd_HHMMSS.html
1444         $selection = $_GET['selection'];
1445         if (isset($_GET['prepend_note_url'])) {
1446             $prependNoteUrl = $_GET['prepend_note_url'];
1447         } else {
1448             $prependNoteUrl = false;
1449         }
1450
1451         try {
1452             $PAGE->assign(
1453                 'links',
1454                 NetscapeBookmarkUtils::filterAndFormat(
1455                     $LINKSDB,
1456                     $selection,
1457                     $prependNoteUrl,
1458                     index_url($_SERVER)
1459                 )
1460             );
1461         } catch (Exception $exc) {
1462             header('Content-Type: text/plain; charset=utf-8');
1463             echo $exc->getMessage();
1464             exit;
1465         }
1466         $now = new DateTime();
1467         header('Content-Type: text/html; charset=utf-8');
1468         header(
1469             'Content-disposition: attachment; filename=bookmarks_'
1470             .$selection.'_'.$now->format(LinkDB::LINK_DATE_FORMAT).'.html'
1471         );
1472         $PAGE->assign('date', $now->format(DateTime::RFC822));
1473         $PAGE->assign('eol', PHP_EOL);
1474         $PAGE->assign('selection', $selection);
1475         $PAGE->renderPage('export.bookmarks');
1476         exit;
1477     }
1478
1479     if ($targetPage == Router::$PAGE_IMPORT) {
1480         // Upload a Netscape bookmark dump to import its contents
1481
1482         if (! isset($_POST['token']) || ! isset($_FILES['filetoupload'])) {
1483             // Show import dialog
1484             $PAGE->assign(
1485                 'maxfilesize',
1486                 get_max_upload_size(
1487                     ini_get('post_max_size'),
1488                     ini_get('upload_max_filesize'),
1489                     false
1490                 )
1491             );
1492             $PAGE->assign(
1493                 'maxfilesizeHuman',
1494                 get_max_upload_size(
1495                     ini_get('post_max_size'),
1496                     ini_get('upload_max_filesize'),
1497                     true
1498                 )
1499             );
1500             $PAGE->assign('pagetitle', t('Import') .' - '. $conf->get('general.title', 'Shaarli'));
1501             $PAGE->renderPage('import');
1502             exit;
1503         }
1504
1505         // Import bookmarks from an uploaded file
1506         if (isset($_FILES['filetoupload']['size']) && $_FILES['filetoupload']['size'] == 0) {
1507             // The file is too big or some form field may be missing.
1508             $msg = sprintf(
1509                 t(
1510                     'The file you are trying to upload is probably bigger than what this webserver can accept'
1511                     .' (%s). Please upload in smaller chunks.'
1512                 ),
1513                 get_max_upload_size(ini_get('post_max_size'), ini_get('upload_max_filesize'))
1514             );
1515             echo '<script>alert("'. $msg .'");document.location=\'?do='.Router::$PAGE_IMPORT .'\';</script>';
1516             exit;
1517         }
1518         if (! $sessionManager->checkToken($_POST['token'])) {
1519             die('Wrong token.');
1520         }
1521         $status = NetscapeBookmarkUtils::import(
1522             $_POST,
1523             $_FILES,
1524             $LINKSDB,
1525             $conf,
1526             $history
1527         );
1528         echo '<script>alert("'.$status.'");document.location=\'?do='
1529              .Router::$PAGE_IMPORT .'\';</script>';
1530         exit;
1531     }
1532
1533     // Plugin administration page
1534     if ($targetPage == Router::$PAGE_PLUGINSADMIN) {
1535         $pluginMeta = $pluginManager->getPluginsMeta();
1536
1537         // Split plugins into 2 arrays: ordered enabled plugins and disabled.
1538         $enabledPlugins = array_filter($pluginMeta, function ($v) {
1539             return $v['order'] !== false;
1540         });
1541         // Load parameters.
1542         $enabledPlugins = load_plugin_parameter_values($enabledPlugins, $conf->get('plugins', array()));
1543         uasort(
1544             $enabledPlugins,
1545             function ($a, $b) {
1546                 return $a['order'] - $b['order'];
1547             }
1548         );
1549         $disabledPlugins = array_filter($pluginMeta, function ($v) {
1550             return $v['order'] === false;
1551         });
1552
1553         $PAGE->assign('enabledPlugins', $enabledPlugins);
1554         $PAGE->assign('disabledPlugins', $disabledPlugins);
1555         $PAGE->assign('pagetitle', t('Plugin administration') .' - '. $conf->get('general.title', 'Shaarli'));
1556         $PAGE->renderPage('pluginsadmin');
1557         exit;
1558     }
1559
1560     // Plugin administration form action
1561     if ($targetPage == Router::$PAGE_SAVE_PLUGINSADMIN) {
1562         try {
1563             if (isset($_POST['parameters_form'])) {
1564                 $pluginManager->executeHooks('save_plugin_parameters', $_POST);
1565                 unset($_POST['parameters_form']);
1566                 foreach ($_POST as $param => $value) {
1567                     $conf->set('plugins.'. $param, escape($value));
1568                 }
1569             } else {
1570                 $conf->set('general.enabled_plugins', save_plugin_config($_POST));
1571             }
1572             $conf->write($loginManager->isLoggedIn());
1573             $history->updateSettings();
1574         } catch (Exception $e) {
1575             error_log(
1576                 'ERROR while saving plugin configuration:.' . PHP_EOL .
1577                 $e->getMessage()
1578             );
1579
1580             // TODO: do not handle exceptions/errors in JS.
1581             echo '<script>alert("'
1582                 . $e->getMessage()
1583                 .'");document.location=\'?do='
1584                 . Router::$PAGE_PLUGINSADMIN
1585                 .'\';</script>';
1586             exit;
1587         }
1588         header('Location: ?do='. Router::$PAGE_PLUGINSADMIN);
1589         exit;
1590     }
1591
1592     // Get a fresh token
1593     if ($targetPage == Router::$GET_TOKEN) {
1594         header('Content-Type:text/plain');
1595         echo $sessionManager->generateToken($conf);
1596         exit;
1597     }
1598
1599     // -------- Thumbnails Update
1600     if ($targetPage == Router::$PAGE_THUMBS_UPDATE) {
1601         $ids = [];
1602         foreach ($LINKSDB as $link) {
1603             // A note or not HTTP(S)
1604             if (is_note($link['url']) || ! startsWith(strtolower($link['url']), 'http')) {
1605                 continue;
1606             }
1607             $ids[] = $link['id'];
1608         }
1609         $PAGE->assign('ids', $ids);
1610         $PAGE->assign('pagetitle', t('Thumbnails update') .' - '. $conf->get('general.title', 'Shaarli'));
1611         $PAGE->renderPage('thumbnails');
1612         exit;
1613     }
1614
1615     // -------- Single Thumbnail Update
1616     if ($targetPage == Router::$AJAX_THUMB_UPDATE) {
1617         if (! isset($_POST['id']) || ! ctype_digit($_POST['id'])) {
1618             http_response_code(400);
1619             exit;
1620         }
1621         $id = (int) $_POST['id'];
1622         if (empty($LINKSDB[$id])) {
1623             http_response_code(404);
1624             exit;
1625         }
1626         $thumbnailer = new Thumbnailer($conf);
1627         $link = $LINKSDB[$id];
1628         $link['thumbnail'] = $thumbnailer->get($link['url']);
1629         $LINKSDB[$id] = $link;
1630         $LINKSDB->save($conf->get('resource.page_cache'));
1631
1632         echo json_encode($link);
1633         exit;
1634     }
1635
1636     // -------- Otherwise, simply display search form and links:
1637     showLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
1638     exit;
1639 }
1640
1641 /**
1642  * Template for the list of links (<div id="linklist">)
1643  * This function fills all the necessary fields in the $PAGE for the template 'linklist.html'
1644  *
1645  * @param pageBuilder   $PAGE          pageBuilder instance.
1646  * @param LinkDB        $LINKSDB       LinkDB instance.
1647  * @param ConfigManager $conf          Configuration Manager instance.
1648  * @param PluginManager $pluginManager Plugin Manager instance.
1649  * @param LoginManager  $loginManager  LoginManager instance
1650  */
1651 function buildLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager)
1652 {
1653     // Used in templates
1654     if (isset($_GET['searchtags'])) {
1655         if (! empty($_GET['searchtags'])) {
1656             $searchtags = escape(normalize_spaces($_GET['searchtags']));
1657         } else {
1658             $searchtags = false;
1659         }
1660     } else {
1661         $searchtags = '';
1662     }
1663     $searchterm = !empty($_GET['searchterm']) ? escape(normalize_spaces($_GET['searchterm'])) : '';
1664
1665     // Smallhash filter
1666     if (! empty($_SERVER['QUERY_STRING'])
1667         && preg_match('/^[a-zA-Z0-9-_@]{6}($|&|#)/', $_SERVER['QUERY_STRING'])) {
1668         try {
1669             $linksToDisplay = $LINKSDB->filterHash($_SERVER['QUERY_STRING']);
1670         } catch (LinkNotFoundException $e) {
1671             $PAGE->render404($e->getMessage());
1672             exit;
1673         }
1674     } else {
1675         // Filter links according search parameters.
1676         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
1677         $request = [
1678             'searchtags' => $searchtags,
1679             'searchterm' => $searchterm,
1680         ];
1681         $linksToDisplay = $LINKSDB->filterSearch($request, false, $visibility, !empty($_SESSION['untaggedonly']));
1682     }
1683
1684     // ---- Handle paging.
1685     $keys = array();
1686     foreach ($linksToDisplay as $key => $value) {
1687         $keys[] = $key;
1688     }
1689
1690     // Select articles according to paging.
1691     $pagecount = ceil(count($keys) / $_SESSION['LINKS_PER_PAGE']);
1692     $pagecount = $pagecount == 0 ? 1 : $pagecount;
1693     $page= empty($_GET['page']) ? 1 : intval($_GET['page']);
1694     $page = $page < 1 ? 1 : $page;
1695     $page = $page > $pagecount ? $pagecount : $page;
1696     // Start index.
1697     $i = ($page-1) * $_SESSION['LINKS_PER_PAGE'];
1698     $end = $i + $_SESSION['LINKS_PER_PAGE'];
1699
1700     $thumbnailsEnabled = $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE) !== Thumbnailer::MODE_NONE;
1701     if ($thumbnailsEnabled) {
1702         $thumbnailer = new Thumbnailer($conf);
1703     }
1704
1705     $linkDisp = array();
1706     while ($i<$end && $i<count($keys)) {
1707         $link = $linksToDisplay[$keys[$i]];
1708         $link['description'] = format_description($link['description']);
1709         $classLi =  ($i % 2) != 0 ? '' : 'publicLinkHightLight';
1710         $link['class'] = $link['private'] == 0 ? $classLi : 'private';
1711         $link['timestamp'] = $link['created']->getTimestamp();
1712         if (! empty($link['updated'])) {
1713             $link['updated_timestamp'] = $link['updated']->getTimestamp();
1714         } else {
1715             $link['updated_timestamp'] = '';
1716         }
1717         $taglist = preg_split('/\s+/', $link['tags'], -1, PREG_SPLIT_NO_EMPTY);
1718         uasort($taglist, 'strcasecmp');
1719         $link['taglist'] = $taglist;
1720
1721         // Logged in, thumbnails enabled, not a note,
1722         // and (never retrieved yet or no valid cache file)
1723         if ($loginManager->isLoggedIn() && $thumbnailsEnabled && $link['url'][0] != '?'
1724             && (! isset($link['thumbnail']) || ($link['thumbnail'] !== false && ! is_file($link['thumbnail'])))
1725         ) {
1726             $elem = $LINKSDB[$keys[$i]];
1727             $elem['thumbnail'] = $thumbnailer->get($link['url']);
1728             $LINKSDB[$keys[$i]] = $elem;
1729             $updateDB = true;
1730             $link['thumbnail'] = $elem['thumbnail'];
1731         }
1732
1733         // Check for both signs of a note: starting with ? and 7 chars long.
1734         if ($link['url'][0] === '?' && strlen($link['url']) === 7) {
1735             $link['url'] = index_url($_SERVER) . $link['url'];
1736         }
1737
1738         $linkDisp[$keys[$i]] = $link;
1739         $i++;
1740     }
1741
1742     // If we retrieved new thumbnails, we update the database.
1743     if (!empty($updateDB)) {
1744         $LINKSDB->save($conf->get('resource.page_cache'));
1745     }
1746
1747     // Compute paging navigation
1748     $searchtagsUrl = $searchtags === '' ? '' : '&searchtags=' . urlencode($searchtags);
1749     $searchtermUrl = empty($searchterm) ? '' : '&searchterm=' . urlencode($searchterm);
1750     $previous_page_url = '';
1751     if ($i != count($keys)) {
1752         $previous_page_url = '?page=' . ($page+1) . $searchtermUrl . $searchtagsUrl;
1753     }
1754     $next_page_url='';
1755     if ($page>1) {
1756         $next_page_url = '?page=' . ($page-1) . $searchtermUrl . $searchtagsUrl;
1757     }
1758
1759     // Fill all template fields.
1760     $data = array(
1761         'previous_page_url' => $previous_page_url,
1762         'next_page_url' => $next_page_url,
1763         'page_current' => $page,
1764         'page_max' => $pagecount,
1765         'result_count' => count($linksToDisplay),
1766         'search_term' => $searchterm,
1767         'search_tags' => $searchtags,
1768         'visibility' => ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '',
1769         'links' => $linkDisp,
1770     );
1771
1772     // If there is only a single link, we change on-the-fly the title of the page.
1773     if (count($linksToDisplay) == 1) {
1774         $data['pagetitle'] = $linksToDisplay[$keys[0]]['title'] .' - '. $conf->get('general.title');
1775     } elseif (! empty($searchterm) || ! empty($searchtags)) {
1776         $data['pagetitle'] = t('Search: ');
1777         $data['pagetitle'] .= ! empty($searchterm) ? $searchterm .' ' : '';
1778         $bracketWrap = function ($tag) {
1779             return '['. $tag .']';
1780         };
1781         $data['pagetitle'] .= ! empty($searchtags)
1782             ? implode(' ', array_map($bracketWrap, preg_split('/\s+/', $searchtags))).' '
1783             : '';
1784         $data['pagetitle'] .= '- '. $conf->get('general.title');
1785     }
1786
1787     $pluginManager->executeHooks('render_linklist', $data, array('loggedin' => $loginManager->isLoggedIn()));
1788
1789     foreach ($data as $key => $value) {
1790         $PAGE->assign($key, $value);
1791     }
1792
1793     return;
1794 }
1795
1796 /**
1797  * Installation
1798  * This function should NEVER be called if the file data/config.php exists.
1799  *
1800  * @param ConfigManager  $conf           Configuration Manager instance.
1801  * @param SessionManager $sessionManager SessionManager instance
1802  * @param LoginManager   $loginManager   LoginManager instance
1803  */
1804 function install($conf, $sessionManager, $loginManager)
1805 {
1806     // On free.fr host, make sure the /sessions directory exists, otherwise login will not work.
1807     if (endsWith($_SERVER['HTTP_HOST'], '.free.fr') && !is_dir($_SERVER['DOCUMENT_ROOT'].'/sessions')) {
1808         mkdir($_SERVER['DOCUMENT_ROOT'].'/sessions', 0705);
1809     }
1810
1811
1812     // This part makes sure sessions works correctly.
1813     // (Because on some hosts, session.save_path may not be set correctly,
1814     // or we may not have write access to it.)
1815     if (isset($_GET['test_session'])
1816         && ( !isset($_SESSION) || !isset($_SESSION['session_tested']) || $_SESSION['session_tested']!='Working')) {
1817         // Step 2: Check if data in session is correct.
1818         $msg = t(
1819             '<pre>Sessions do not seem to work correctly on your server.<br>'.
1820             'Make sure the variable "session.save_path" is set correctly in your PHP config, '.
1821             'and that you have write access to it.<br>'.
1822             'It currently points to %s.<br>'.
1823             'On some browsers, accessing your server via a hostname like \'localhost\' '.
1824             'or any custom hostname without a dot causes cookie storage to fail. '.
1825             'We recommend accessing your server via it\'s IP address or Fully Qualified Domain Name.<br>'
1826         );
1827         $msg = sprintf($msg, session_save_path());
1828         echo $msg;
1829         echo '<br><a href="?">'. t('Click to try again.') .'</a></pre>';
1830         die;
1831     }
1832     if (!isset($_SESSION['session_tested'])) {
1833         // Step 1 : Try to store data in session and reload page.
1834         $_SESSION['session_tested'] = 'Working';  // Try to set a variable in session.
1835         header('Location: '.index_url($_SERVER).'?test_session');  // Redirect to check stored data.
1836     }
1837     if (isset($_GET['test_session'])) {
1838         // Step 3: Sessions are OK. Remove test parameter from URL.
1839         header('Location: '.index_url($_SERVER));
1840     }
1841
1842
1843     if (!empty($_POST['setlogin']) && !empty($_POST['setpassword'])) {
1844         $tz = 'UTC';
1845         if (!empty($_POST['continent']) && !empty($_POST['city'])
1846             && isTimeZoneValid($_POST['continent'], $_POST['city'])
1847         ) {
1848             $tz = $_POST['continent'].'/'.$_POST['city'];
1849         }
1850         $conf->set('general.timezone', $tz);
1851         $login = $_POST['setlogin'];
1852         $conf->set('credentials.login', $login);
1853         $salt = sha1(uniqid('', true) .'_'. mt_rand());
1854         $conf->set('credentials.salt', $salt);
1855         $conf->set('credentials.hash', sha1($_POST['setpassword'] . $login . $salt));
1856         if (!empty($_POST['title'])) {
1857             $conf->set('general.title', escape($_POST['title']));
1858         } else {
1859             $conf->set('general.title', 'Shared links on '.escape(index_url($_SERVER)));
1860         }
1861         $conf->set('translation.language', escape($_POST['language']));
1862         $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1863         $conf->set('api.enabled', !empty($_POST['enableApi']));
1864         $conf->set(
1865             'api.secret',
1866             generate_api_secret(
1867                 $conf->get('credentials.login'),
1868                 $conf->get('credentials.salt')
1869             )
1870         );
1871         try {
1872             // Everything is ok, let's create config file.
1873             $conf->write($loginManager->isLoggedIn());
1874         } catch (Exception $e) {
1875             error_log(
1876                 'ERROR while writing config file after installation.' . PHP_EOL .
1877                     $e->getMessage()
1878             );
1879
1880             // TODO: do not handle exceptions/errors in JS.
1881             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?\';</script>';
1882             exit;
1883         }
1884         echo '<script>alert('
1885             .'"Shaarli is now configured. '
1886             .'Please enter your login/password and start shaaring your links!"'
1887             .');document.location=\'?do=login\';</script>';
1888         exit;
1889     }
1890
1891     $PAGE = new PageBuilder($conf, $_SESSION, null, $sessionManager->generateToken());
1892     list($continents, $cities) = generateTimeZoneData(timezone_identifiers_list(), date_default_timezone_get());
1893     $PAGE->assign('continents', $continents);
1894     $PAGE->assign('cities', $cities);
1895     $PAGE->assign('languages', Languages::getAvailableLanguages());
1896     $PAGE->renderPage('install');
1897     exit;
1898 }
1899
1900 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=dailyrss')) {
1901     showDailyRSS($conf, $loginManager);
1902     exit;
1903 }
1904
1905 if (!isset($_SESSION['LINKS_PER_PAGE'])) {
1906     $_SESSION['LINKS_PER_PAGE'] = $conf->get('general.links_per_page', 20);
1907 }
1908
1909 try {
1910     $history = new History($conf->get('resource.history'));
1911 } catch (Exception $e) {
1912     die($e->getMessage());
1913 }
1914
1915 $linkDb = new LinkDB(
1916     $conf->get('resource.datastore'),
1917     $loginManager->isLoggedIn(),
1918     $conf->get('privacy.hide_public_links')
1919 );
1920
1921 $container = new \Slim\Container();
1922 $container['conf'] = $conf;
1923 $container['plugins'] = $pluginManager;
1924 $container['history'] = $history;
1925 $app = new \Slim\App($container);
1926
1927 // REST API routes
1928 $app->group('/api/v1', function () {
1929     $this->get('/info', '\Shaarli\Api\Controllers\Info:getInfo')->setName('getInfo');
1930     $this->get('/links', '\Shaarli\Api\Controllers\Links:getLinks')->setName('getLinks');
1931     $this->get('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:getLink')->setName('getLink');
1932     $this->post('/links', '\Shaarli\Api\Controllers\Links:postLink')->setName('postLink');
1933     $this->put('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:putLink')->setName('putLink');
1934     $this->delete('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:deleteLink')->setName('deleteLink');
1935
1936     $this->get('/tags', '\Shaarli\Api\Controllers\Tags:getTags')->setName('getTags');
1937     $this->get('/tags/{tagName:[\w]+}', '\Shaarli\Api\Controllers\Tags:getTag')->setName('getTag');
1938     $this->put('/tags/{tagName:[\w]+}', '\Shaarli\Api\Controllers\Tags:putTag')->setName('putTag');
1939     $this->delete('/tags/{tagName:[\w]+}', '\Shaarli\Api\Controllers\Tags:deleteTag')->setName('deleteTag');
1940
1941     $this->get('/history', '\Shaarli\Api\Controllers\HistoryController:getHistory')->setName('getHistory');
1942 })->add('\Shaarli\Api\ApiMiddleware');
1943
1944 $response = $app->run(true);
1945
1946 // Hack to make Slim and Shaarli router work together:
1947 // If a Slim route isn't found and NOT API call, we call renderPage().
1948 if ($response->getStatusCode() == 404 && strpos($_SERVER['REQUEST_URI'], '/api/v1') === false) {
1949     // We use UTF-8 for proper international characters handling.
1950     header('Content-Type: text/html; charset=utf-8');
1951     renderPage($conf, $pluginManager, $linkDb, $history, $sessionManager, $loginManager);
1952 } else {
1953     $response = $response
1954         ->withHeader('Access-Control-Allow-Origin', '*')
1955         ->withHeader(
1956             'Access-Control-Allow-Headers',
1957             'X-Requested-With, Content-Type, Accept, Origin, Authorization'
1958         )
1959         ->withHeader('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE, OPTIONS');
1960     $app->respond($response);
1961 }