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/bookmark/LinkUtils.php';
  61 require_once 'application/config/ConfigPlugin.php';
  62 require_once 'application/feed/Cache.php';
  63 require_once 'application/http/HttpUtils.php';
  64 require_once 'application/http/UrlUtils.php';
  65 require_once 'application/updater/UpdaterUtils.php';
  66 require_once 'application/FileUtils.php';
  67 require_once 'application/History.php';
  68 require_once 'application/NetscapeBookmarkUtils.php';
  69 require_once 'application/TimeZone.php';
  70 require_once 'application/Utils.php';
  71 require_once 'application/PluginManager.php';
  72 require_once 'application/Router.php';
  73
  74 use \Shaarli\Bookmark\Exception\LinkNotFoundException;
  75 use \Shaarli\Bookmark\LinkDB;
  76 use \Shaarli\Config\ConfigManager;
  77 use \Shaarli\Feed\CachedPage;
  78 use \Shaarli\Feed\FeedBuilder;
  79 use \Shaarli\History;
  80 use \Shaarli\Languages;
  81 use \Shaarli\Render\PageBuilder;
  82 use \Shaarli\Render\ThemeUtils;
  83 use \Shaarli\Security\LoginManager;
  84 use \Shaarli\Security\SessionManager;
  85 use \Shaarli\Thumbnailer;
  86 use Shaarli\Updater\Updater;
  87
  88 // Ensure the PHP version is supported
  89 try {
  90     ApplicationUtils::checkPHPVersion('5.5', PHP_VERSION);
  91 } catch (Exception $exc) {
  92     header('Content-Type: text/plain; charset=utf-8');
  93     echo $exc->getMessage();
  94     exit;
  95 }
  96
  97 define('SHAARLI_VERSION', ApplicationUtils::getVersion(__DIR__ .'/'. ApplicationUtils::$VERSION_FILE));
  98
  99 // Force cookie path (but do not change lifetime)
 100 $cookie = session_get_cookie_params();
 101 $cookiedir = '';
 102 if (dirname($_SERVER['SCRIPT_NAME']) != '/') {
 103     $cookiedir = dirname($_SERVER["SCRIPT_NAME"]).'/';
 104 }
 105 // Set default cookie expiration and path.
 106 session_set_cookie_params($cookie['lifetime'], $cookiedir, $_SERVER['SERVER_NAME']);
 107 // Set session parameters on server side.
 108 // Use cookies to store session.
 109 ini_set('session.use_cookies', 1);
 110 // Force cookies for session (phpsessionID forbidden in URL).
 111 ini_set('session.use_only_cookies', 1);
 112 // Prevent PHP form using sessionID in URL if cookies are disabled.
 113 ini_set('session.use_trans_sid', false);
 114
 115 session_name('shaarli');
 116 // Start session if needed (Some server auto-start sessions).
 117 if (session_status() == PHP_SESSION_NONE) {
 118     session_start();
 119 }
 120
 121 // Regenerate session ID if invalid or not defined in cookie.
 122 if (isset($_COOKIE['shaarli']) && !SessionManager::checkId($_COOKIE['shaarli'])) {
 123     session_regenerate_id(true);
 124     $_COOKIE['shaarli'] = session_id();
 125 }
 126
 127 $conf = new ConfigManager();
 128 $sessionManager = new SessionManager($_SESSION, $conf);
 129 $loginManager = new LoginManager($GLOBALS, $conf, $sessionManager);
 130 $loginManager->generateStaySignedInToken($_SERVER['REMOTE_ADDR']);
 131 $clientIpId = client_ip_id($_SERVER);
 132
 133 // LC_MESSAGES isn't defined without php-intl, in this case use LC_COLLATE locale instead.
 134 if (! defined('LC_MESSAGES')) {
 135     define('LC_MESSAGES', LC_COLLATE);
 136 }
 137
 138 // Sniff browser language and set date format accordingly.
 139 if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
 140     autoLocale($_SERVER['HTTP_ACCEPT_LANGUAGE']);
 141 }
 142
 143 new Languages(setlocale(LC_MESSAGES, 0), $conf);
 144
 145 $conf->setEmpty('general.timezone', date_default_timezone_get());
 146 $conf->setEmpty('general.title', t('Shared links on '). escape(index_url($_SERVER)));
 147 RainTPL::$tpl_dir = $conf->get('resource.raintpl_tpl').'/'.$conf->get('resource.theme').'/'; // template directory
 148 RainTPL::$cache_dir = $conf->get('resource.raintpl_tmp'); // cache directory
 149
 150 $pluginManager = new PluginManager($conf);
 151 $pluginManager->load($conf->get('general.enabled_plugins'));
 152
 153 date_default_timezone_set($conf->get('general.timezone', 'UTC'));
 154
 155 ob_start();  // Output buffering for the page cache.
 156
 157 // Prevent caching on client side or proxy: (yes, it's ugly)
 158 header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
 159 header("Cache-Control: no-store, no-cache, must-revalidate");
 160 header("Cache-Control: post-check=0, pre-check=0", false);
 161 header("Pragma: no-cache");
 162
 163 if (! is_file($conf->getConfigFileExt())) {
 164     // Ensure Shaarli has proper access to its resources
 165     $errors = ApplicationUtils::checkResourcePermissions($conf);
 166
 167     if ($errors != array()) {
 168         $message = '<p>'. t('Insufficient permissions:') .'</p><ul>';
 169
 170         foreach ($errors as $error) {
 171             $message .= '<li>'.$error.'</li>';
 172         }
 173         $message .= '</ul>';
 174
 175         header('Content-Type: text/html; charset=utf-8');
 176         echo $message;
 177         exit;
 178     }
 179
 180     // Display the installation form if no existing config is found
 181     install($conf, $sessionManager, $loginManager);
 182 }
 183
 184 $loginManager->checkLoginState($_COOKIE, $clientIpId);
 185
 186 /**
 187  * Adapter function to ensure compatibility with third-party templates
 188  *
 189  * @see https://github.com/shaarli/Shaarli/pull/1086
 190  *
 191  * @return bool true when the user is logged in, false otherwise
 192  */
 193 function isLoggedIn()
 194 {
 195     global $loginManager;
 196     return $loginManager->isLoggedIn();
 197 }
 198
 199
 200 // ------------------------------------------------------------------------------------------
 201 // Process login form: Check if login/password is correct.
 202 if (isset($_POST['login'])) {
 203     if (! $loginManager->canLogin($_SERVER)) {
 204         die(t('I said: NO. You are banned for the moment. Go away.'));
 205     }
 206     if (isset($_POST['password'])
 207         && $sessionManager->checkToken($_POST['token'])
 208         && $loginManager->checkCredentials($_SERVER['REMOTE_ADDR'], $clientIpId, $_POST['login'], $_POST['password'])
 209     ) {
 210         $loginManager->handleSuccessfulLogin($_SERVER);
 211
 212         $cookiedir = '';
 213         if (dirname($_SERVER['SCRIPT_NAME']) != '/') {
 214             // Note: Never forget the trailing slash on the cookie path!
 215             $cookiedir = dirname($_SERVER["SCRIPT_NAME"]) . '/';
 216         }
 217
 218         if (!empty($_POST['longlastingsession'])) {
 219             // Keep the session cookie even after the browser closes
 220             $sessionManager->setStaySignedIn(true);
 221             $expirationTime = $sessionManager->extendSession();
 222
 223             setcookie(
 224                 $loginManager::$STAY_SIGNED_IN_COOKIE,
 225                 $loginManager->getStaySignedInToken(),
 226                 $expirationTime,
 227                 WEB_PATH
 228             );
 229         } else {
 230             // Standard session expiration (=when browser closes)
 231             $expirationTime = 0;
 232         }
 233
 234         // Send cookie with the new expiration date to the browser
 235         session_set_cookie_params($expirationTime, $cookiedir, $_SERVER['SERVER_NAME']);
 236         session_regenerate_id(true);
 237
 238         // Optional redirect after login:
 239         if (isset($_GET['post'])) {
 240             $uri = '?post='. urlencode($_GET['post']);
 241             foreach (array('description', 'source', 'title', 'tags') as $param) {
 242                 if (!empty($_GET[$param])) {
 243                     $uri .= '&'.$param.'='.urlencode($_GET[$param]);
 244                 }
 245             }
 246             header('Location: '. $uri);
 247             exit;
 248         }
 249
 250         if (isset($_GET['edit_link'])) {
 251             header('Location: ?edit_link='. escape($_GET['edit_link']));
 252             exit;
 253         }
 254
 255         if (isset($_POST['returnurl'])) {
 256             // Prevent loops over login screen.
 257             if (strpos($_POST['returnurl'], 'do=login') === false) {
 258                 header('Location: '. generateLocation($_POST['returnurl'], $_SERVER['HTTP_HOST']));
 259                 exit;
 260             }
 261         }
 262         header('Location: ?');
 263         exit;
 264     } else {
 265         $loginManager->handleFailedLogin($_SERVER);
 266         $redir = '&username='. urlencode($_POST['login']);
 267         if (isset($_GET['post'])) {
 268             $redir .= '&post=' . urlencode($_GET['post']);
 269             foreach (array('description', 'source', 'title', 'tags') as $param) {
 270                 if (!empty($_GET[$param])) {
 271                     $redir .= '&' . $param . '=' . urlencode($_GET[$param]);
 272                 }
 273             }
 274         }
 275         // Redirect to login screen.
 276         echo '<script>alert("'. t("Wrong login/password.") .'");document.location=\'?do=login'.$redir.'\';</script>';
 277         exit;
 278     }
 279 }
 280
 281 // ------------------------------------------------------------------------------------------
 282 // Token management for XSRF protection
 283 // Token should be used in any form which acts on data (create,update,delete,import...).
 284 if (!isset($_SESSION['tokens'])) {
 285     $_SESSION['tokens']=array();  // Token are attached to the session.
 286 }
 287
 288 /**
 289  * Daily RSS feed: 1 RSS entry per day giving all the links on that day.
 290  * Gives the last 7 days (which have links).
 291  * This RSS feed cannot be filtered.
 292  *
 293  * @param ConfigManager $conf         Configuration Manager instance
 294  * @param LoginManager  $loginManager LoginManager instance
 295  */
 296 function showDailyRSS($conf, $loginManager)
 297 {
 298     // Cache system
 299     $query = $_SERVER['QUERY_STRING'];
 300     $cache = new CachedPage(
 301         $conf->get('config.PAGE_CACHE'),
 302         page_url($_SERVER),
 303         startsWith($query, 'do=dailyrss') && !$loginManager->isLoggedIn()
 304     );
 305     $cached = $cache->cachedVersion();
 306     if (!empty($cached)) {
 307         echo $cached;
 308         exit;
 309     }
 310
 311     // If cached was not found (or not usable), then read the database and build the response:
 312     // Read links from database (and filter private links if used it not logged in).
 313     $LINKSDB = new LinkDB(
 314         $conf->get('resource.datastore'),
 315         $loginManager->isLoggedIn(),
 316         $conf->get('privacy.hide_public_links'),
 317         $conf->get('redirector.url'),
 318         $conf->get('redirector.encode_url')
 319     );
 320
 321     /* Some Shaarlies may have very few links, so we need to look
 322        back in time until we have enough days ($nb_of_days).
 323     */
 324     $nb_of_days = 7; // We take 7 days.
 325     $today = date('Ymd');
 326     $days = array();
 327
 328     foreach ($LINKSDB as $link) {
 329         $day = $link['created']->format('Ymd'); // Extract day (without time)
 330         if (strcmp($day, $today) < 0) {
 331             if (empty($days[$day])) {
 332                 $days[$day] = array();
 333             }
 334             $days[$day][] = $link;
 335         }
 336
 337         if (count($days) > $nb_of_days) {
 338             break; // Have we collected enough days?
 339         }
 340     }
 341
 342     // Build the RSS feed.
 343     header('Content-Type: application/rss+xml; charset=utf-8');
 344     $pageaddr = escape(index_url($_SERVER));
 345     echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0">';
 346     echo '<channel>';
 347     echo '<title>Daily - '. $conf->get('general.title') . '</title>';
 348     echo '<link>'. $pageaddr .'</link>';
 349     echo '<description>Daily shared links</description>';
 350     echo '<language>en-en</language>';
 351     echo '<copyright>'. $pageaddr .'</copyright>'. PHP_EOL;
 352
 353     // For each day.
 354     foreach ($days as $day => $links) {
 355         $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 356         $absurl = escape(index_url($_SERVER).'?do=daily&day='.$day);  // Absolute URL of the corresponding "Daily" page.
 357
 358         // We pre-format some fields for proper output.
 359         foreach ($links as &$link) {
 360             $link['formatedDescription'] = format_description(
 361                 $link['description'],
 362                 $conf->get('redirector.url'),
 363                 $conf->get('redirector.encode_url')
 364             );
 365             $link['timestamp'] = $link['created']->getTimestamp();
 366             if (startsWith($link['url'], '?')) {
 367                 $link['url'] = index_url($_SERVER) . $link['url'];  // make permalink URL absolute
 368             }
 369         }
 370
 371         // Then build the HTML for this day:
 372         $tpl = new RainTPL;
 373         $tpl->assign('title', $conf->get('general.title'));
 374         $tpl->assign('daydate', $dayDate->getTimestamp());
 375         $tpl->assign('absurl', $absurl);
 376         $tpl->assign('links', $links);
 377         $tpl->assign('rssdate', escape($dayDate->format(DateTime::RSS)));
 378         $tpl->assign('hide_timestamps', $conf->get('privacy.hide_timestamps', false));
 379         $tpl->assign('index_url', $pageaddr);
 380         $html = $tpl->draw('dailyrss', true);
 381
 382         echo $html . PHP_EOL;
 383     }
 384     echo '</channel></rss><!-- Cached version of '. escape(page_url($_SERVER)) .' -->';
 385
 386     $cache->cache(ob_get_contents());
 387     ob_end_flush();
 388     exit;
 389 }
 390
 391 /**
 392  * Show the 'Daily' page.
 393  *
 394  * @param PageBuilder   $pageBuilder   Template engine wrapper.
 395  * @param LinkDB        $LINKSDB       LinkDB instance.
 396  * @param ConfigManager $conf          Configuration Manager instance.
 397  * @param PluginManager $pluginManager Plugin Manager instance.
 398  * @param LoginManager  $loginManager  Login Manager instance
 399  */
 400 function showDaily($pageBuilder, $LINKSDB, $conf, $pluginManager, $loginManager)
 401 {
 402     $day = date('Ymd', strtotime('-1 day')); // Yesterday, in format YYYYMMDD.
 403     if (isset($_GET['day'])) {
 404         $day = $_GET['day'];
 405     }
 406
 407     $days = $LINKSDB->days();
 408     $i = array_search($day, $days);
 409     if ($i === false && count($days)) {
 410         // no links for day, but at least one day with links
 411         $i = count($days) - 1;
 412         $day = $days[$i];
 413     }
 414     $previousday = '';
 415     $nextday = '';
 416
 417     if ($i !== false) {
 418         if ($i >= 1) {
 419              $previousday=$days[$i - 1];
 420         }
 421         if ($i < count($days) - 1) {
 422             $nextday = $days[$i + 1];
 423         }
 424     }
 425     try {
 426         $linksToDisplay = $LINKSDB->filterDay($day);
 427     } catch (Exception $exc) {
 428         error_log($exc);
 429         $linksToDisplay = array();
 430     }
 431
 432     // We pre-format some fields for proper output.
 433     foreach ($linksToDisplay as $key => $link) {
 434         $taglist = explode(' ', $link['tags']);
 435         uasort($taglist, 'strcasecmp');
 436         $linksToDisplay[$key]['taglist']=$taglist;
 437         $linksToDisplay[$key]['formatedDescription'] = format_description(
 438             $link['description'],
 439             $conf->get('redirector.url'),
 440             $conf->get('redirector.encode_url')
 441         );
 442         $linksToDisplay[$key]['timestamp'] =  $link['created']->getTimestamp();
 443     }
 444
 445     $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 446     $data = array(
 447         'pagetitle' => $conf->get('general.title') .' - '. format_date($dayDate, false),
 448         'linksToDisplay' => $linksToDisplay,
 449         'day' => $dayDate->getTimestamp(),
 450         'dayDate' => $dayDate,
 451         'previousday' => $previousday,
 452         'nextday' => $nextday,
 453     );
 454
 455     /* Hook is called before column construction so that plugins don't have
 456        to deal with columns. */
 457     $pluginManager->executeHooks('render_daily', $data, array('loggedin' => $loginManager->isLoggedIn()));
 458
 459     /* We need to spread the articles on 3 columns.
 460        I did not want to use a JavaScript lib like http://masonry.desandro.com/
 461        so I manually spread entries with a simple method: I roughly evaluate the
 462        height of a div according to title and description length.
 463     */
 464     $columns = array(array(), array(), array()); // Entries to display, for each column.
 465     $fill = array(0, 0, 0);  // Rough estimate of columns fill.
 466     foreach ($data['linksToDisplay'] as $key => $link) {
 467         // Roughly estimate length of entry (by counting characters)
 468         // Title: 30 chars = 1 line. 1 line is 30 pixels height.
 469         // Description: 836 characters gives roughly 342 pixel height.
 470         // This is not perfect, but it's usually OK.
 471         $length = strlen($link['title']) + (342 * strlen($link['description'])) / 836;
 472         if ($link['thumbnail']) {
 473             $length += 100; // 1 thumbnails roughly takes 100 pixels height.
 474         }
 475         // Then put in column which is the less filled:
 476         $smallest = min($fill); // find smallest value in array.
 477         $index = array_search($smallest, $fill); // find index of this smallest value.
 478         array_push($columns[$index], $link); // Put entry in this column.
 479         $fill[$index] += $length;
 480     }
 481
 482     $data['cols'] = $columns;
 483
 484     foreach ($data as $key => $value) {
 485         $pageBuilder->assign($key, $value);
 486     }
 487
 488     $pageBuilder->assign('pagetitle', t('Daily') .' - '. $conf->get('general.title', 'Shaarli'));
 489     $pageBuilder->renderPage('daily');
 490     exit;
 491 }
 492
 493 /**
 494  * Renders the linklist
 495  *
 496  * @param pageBuilder   $PAGE    pageBuilder instance.
 497  * @param LinkDB        $LINKSDB LinkDB instance.
 498  * @param ConfigManager $conf    Configuration Manager instance.
 499  * @param PluginManager $pluginManager Plugin Manager instance.
 500  */
 501 function showLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager)
 502 {
 503     buildLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
 504     $PAGE->renderPage('linklist');
 505 }
 506
 507 /**
 508  * Render HTML page (according to URL parameters and user rights)
 509  *
 510  * @param ConfigManager  $conf           Configuration Manager instance.
 511  * @param PluginManager  $pluginManager  Plugin Manager instance,
 512  * @param LinkDB         $LINKSDB
 513  * @param History        $history        instance
 514  * @param SessionManager $sessionManager SessionManager instance
 515  * @param LoginManager   $loginManager   LoginManager instance
 516  */
 517 function renderPage($conf, $pluginManager, $LINKSDB, $history, $sessionManager, $loginManager)
 518 {
 519     $updater = new Updater(
 520         read_updates_file($conf->get('resource.updates')),
 521         $LINKSDB,
 522         $conf,
 523         $loginManager->isLoggedIn(),
 524         $_SESSION
 525     );
 526     try {
 527         $newUpdates = $updater->update();
 528         if (! empty($newUpdates)) {
 529             write_updates_file(
 530                 $conf->get('resource.updates'),
 531                 $updater->getDoneUpdates()
 532             );
 533         }
 534     } catch (Exception $e) {
 535         die($e->getMessage());
 536     }
 537
 538     $PAGE = new PageBuilder($conf, $_SESSION, $LINKSDB, $sessionManager->generateToken(), $loginManager->isLoggedIn());
 539     $PAGE->assign('linkcount', count($LINKSDB));
 540     $PAGE->assign('privateLinkcount', count_private($LINKSDB));
 541     $PAGE->assign('plugin_errors', $pluginManager->getErrors());
 542
 543     // Determine which page will be rendered.
 544     $query = (isset($_SERVER['QUERY_STRING'])) ? $_SERVER['QUERY_STRING'] : '';
 545     $targetPage = Router::findPage($query, $_GET, $loginManager->isLoggedIn());
 546
 547     if (// if the user isn't logged in
 548         !$loginManager->isLoggedIn() &&
 549         // and Shaarli doesn't have public content...
 550         $conf->get('privacy.hide_public_links') &&
 551         // and is configured to enforce the login
 552         $conf->get('privacy.force_login') &&
 553         // and the current page isn't already the login page
 554         $targetPage !== Router::$PAGE_LOGIN &&
 555         // and the user is not requesting a feed (which would lead to a different content-type as expected)
 556         $targetPage !== Router::$PAGE_FEED_ATOM &&
 557         $targetPage !== Router::$PAGE_FEED_RSS
 558     ) {
 559         // force current page to be the login page
 560         $targetPage = Router::$PAGE_LOGIN;
 561     }
 562
 563     // Call plugin hooks for header, footer and includes, specifying which page will be rendered.
 564     // Then assign generated data to RainTPL.
 565     $common_hooks = array(
 566         'includes',
 567         'header',
 568         'footer',
 569     );
 570
 571     foreach ($common_hooks as $name) {
 572         $plugin_data = array();
 573         $pluginManager->executeHooks(
 574             'render_' . $name,
 575             $plugin_data,
 576             array(
 577                 'target' => $targetPage,
 578                 'loggedin' => $loginManager->isLoggedIn()
 579             )
 580         );
 581         $PAGE->assign('plugins_' . $name, $plugin_data);
 582     }
 583
 584     // -------- Display login form.
 585     if ($targetPage == Router::$PAGE_LOGIN) {
 586         if ($conf->get('security.open_shaarli')) {
 587             header('Location: ?');
 588             exit;
 589         }  // No need to login for open Shaarli
 590         if (isset($_GET['username'])) {
 591             $PAGE->assign('username', escape($_GET['username']));
 592         }
 593         $PAGE->assign('returnurl', (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']):''));
 594         // add default state of the 'remember me' checkbox
 595         $PAGE->assign('remember_user_default', $conf->get('privacy.remember_user_default'));
 596         $PAGE->assign('user_can_login', $loginManager->canLogin($_SERVER));
 597         $PAGE->assign('pagetitle', t('Login') .' - '. $conf->get('general.title', 'Shaarli'));
 598         $PAGE->renderPage('loginform');
 599         exit;
 600     }
 601     // -------- User wants to logout.
 602     if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=logout')) {
 603         invalidateCaches($conf->get('resource.page_cache'));
 604         $sessionManager->logout();
 605         setcookie(LoginManager::$STAY_SIGNED_IN_COOKIE, 'false', 0, WEB_PATH);
 606         header('Location: ?');
 607         exit;
 608     }
 609
 610     // -------- Picture wall
 611     if ($targetPage == Router::$PAGE_PICWALL) {
 612         $PAGE->assign('pagetitle', t('Picture wall') .' - '. $conf->get('general.title', 'Shaarli'));
 613         if (! $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE) === Thumbnailer::MODE_NONE) {
 614             $PAGE->assign('linksToDisplay', []);
 615             $PAGE->renderPage('picwall');
 616             exit;
 617         }
 618
 619         // Optionally filter the results:
 620         $links = $LINKSDB->filterSearch($_GET);
 621         $linksToDisplay = array();
 622
 623         // Get only links which have a thumbnail.
 624         // Note: we do not retrieve thumbnails here, the request is too heavy.
 625         foreach ($links as $key => $link) {
 626             if (isset($link['thumbnail']) && $link['thumbnail'] !== false) {
 627                 $linksToDisplay[] = $link; // Add to array.
 628             }
 629         }
 630
 631         $data = array(
 632             'linksToDisplay' => $linksToDisplay,
 633         );
 634         $pluginManager->executeHooks('render_picwall', $data, array('loggedin' => $loginManager->isLoggedIn()));
 635
 636         foreach ($data as $key => $value) {
 637             $PAGE->assign($key, $value);
 638         }
 639
 640
 641         $PAGE->renderPage('picwall');
 642         exit;
 643     }
 644
 645     // -------- Tag cloud
 646     if ($targetPage == Router::$PAGE_TAGCLOUD) {
 647         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
 648         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 649         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 650
 651         // We sort tags alphabetically, then choose a font size according to count.
 652         // First, find max value.
 653         $maxcount = 0;
 654         foreach ($tags as $value) {
 655             $maxcount = max($maxcount, $value);
 656         }
 657
 658         alphabetical_sort($tags, false, true);
 659
 660         $tagList = array();
 661         foreach ($tags as $key => $value) {
 662             if (in_array($key, $filteringTags)) {
 663                 continue;
 664             }
 665             // Tag font size scaling:
 666             //   default 15 and 30 logarithm bases affect scaling,
 667             //   22 and 6 are arbitrary font sizes for max and min sizes.
 668             $size = log($value, 15) / log($maxcount, 30) * 2.2 + 0.8;
 669             $tagList[$key] = array(
 670                 'count' => $value,
 671                 'size' => number_format($size, 2, '.', ''),
 672             );
 673         }
 674
 675         $searchTags = implode(' ', escape($filteringTags));
 676         $data = array(
 677             'search_tags' => $searchTags,
 678             'tags' => $tagList,
 679         );
 680         $pluginManager->executeHooks('render_tagcloud', $data, array('loggedin' => $loginManager->isLoggedIn()));
 681
 682         foreach ($data as $key => $value) {
 683             $PAGE->assign($key, $value);
 684         }
 685
 686         $searchTags = ! empty($searchTags) ? $searchTags .' - ' : '';
 687         $PAGE->assign('pagetitle', $searchTags. t('Tag cloud') .' - '. $conf->get('general.title', 'Shaarli'));
 688         $PAGE->renderPage('tag.cloud');
 689         exit;
 690     }
 691
 692     // -------- Tag list
 693     if ($targetPage == Router::$PAGE_TAGLIST) {
 694         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
 695         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 696         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 697         foreach ($filteringTags as $tag) {
 698             if (array_key_exists($tag, $tags)) {
 699                 unset($tags[$tag]);
 700             }
 701         }
 702
 703         if (! empty($_GET['sort']) && $_GET['sort'] === 'alpha') {
 704             alphabetical_sort($tags, false, true);
 705         }
 706
 707         $searchTags = implode(' ', escape($filteringTags));
 708         $data = [
 709             'search_tags' => $searchTags,
 710             'tags' => $tags,
 711         ];
 712         $pluginManager->executeHooks('render_taglist', $data, ['loggedin' => $loginManager->isLoggedIn()]);
 713
 714         foreach ($data as $key => $value) {
 715             $PAGE->assign($key, $value);
 716         }
 717
 718         $searchTags = ! empty($searchTags) ? $searchTags .' - ' : '';
 719         $PAGE->assign('pagetitle', $searchTags . t('Tag list') .' - '. $conf->get('general.title', 'Shaarli'));
 720         $PAGE->renderPage('tag.list');
 721         exit;
 722     }
 723
 724     // Daily page.
 725     if ($targetPage == Router::$PAGE_DAILY) {
 726         showDaily($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
 727     }
 728
 729     // ATOM and RSS feed.
 730     if ($targetPage == Router::$PAGE_FEED_ATOM || $targetPage == Router::$PAGE_FEED_RSS) {
 731         $feedType = $targetPage == Router::$PAGE_FEED_RSS ? FeedBuilder::$FEED_RSS : FeedBuilder::$FEED_ATOM;
 732         header('Content-Type: application/'. $feedType .'+xml; charset=utf-8');
 733
 734         // Cache system
 735         $query = $_SERVER['QUERY_STRING'];
 736         $cache = new CachedPage(
 737             $conf->get('resource.page_cache'),
 738             page_url($_SERVER),
 739             startsWith($query, 'do='. $targetPage) && !$loginManager->isLoggedIn()
 740         );
 741         $cached = $cache->cachedVersion();
 742         if (!empty($cached)) {
 743             echo $cached;
 744             exit;
 745         }
 746
 747         // Generate data.
 748         $feedGenerator = new FeedBuilder($LINKSDB, $feedType, $_SERVER, $_GET, $loginManager->isLoggedIn());
 749         $feedGenerator->setLocale(strtolower(setlocale(LC_COLLATE, 0)));
 750         $feedGenerator->setHideDates($conf->get('privacy.hide_timestamps') && !$loginManager->isLoggedIn());
 751         $feedGenerator->setUsePermalinks(isset($_GET['permalinks']) || !$conf->get('feed.rss_permalinks'));
 752         $data = $feedGenerator->buildData();
 753
 754         // Process plugin hook.
 755         $pluginManager->executeHooks('render_feed', $data, array(
 756             'loggedin' => $loginManager->isLoggedIn(),
 757             'target' => $targetPage,
 758         ));
 759
 760         // Render the template.
 761         $PAGE->assignAll($data);
 762         $PAGE->renderPage('feed.'. $feedType);
 763         $cache->cache(ob_get_contents());
 764         ob_end_flush();
 765         exit;
 766     }
 767
 768     // Display opensearch plugin (XML)
 769     if ($targetPage == Router::$PAGE_OPENSEARCH) {
 770         header('Content-Type: application/xml; charset=utf-8');
 771         $PAGE->assign('serverurl', index_url($_SERVER));
 772         $PAGE->renderPage('opensearch');
 773         exit;
 774     }
 775
 776     // -------- User clicks on a tag in a link: The tag is added to the list of searched tags (searchtags=...)
 777     if (isset($_GET['addtag'])) {
 778         // Get previous URL (http_referer) and add the tag to the searchtags parameters in query.
 779         if (empty($_SERVER['HTTP_REFERER'])) {
 780             // In case browser does not send HTTP_REFERER
 781             header('Location: ?searchtags='.urlencode($_GET['addtag']));
 782             exit;
 783         }
 784         parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $params);
 785
 786         // Prevent redirection loop
 787         if (isset($params['addtag'])) {
 788             unset($params['addtag']);
 789         }
 790
 791         // Check if this tag is already in the search query and ignore it if it is.
 792         // Each tag is always separated by a space
 793         if (isset($params['searchtags'])) {
 794             $current_tags = explode(' ', $params['searchtags']);
 795         } else {
 796             $current_tags = array();
 797         }
 798         $addtag = true;
 799         foreach ($current_tags as $value) {
 800             if ($value === $_GET['addtag']) {
 801                 $addtag = false;
 802                 break;
 803             }
 804         }
 805         // Append the tag if necessary
 806         if (empty($params['searchtags'])) {
 807             $params['searchtags'] = trim($_GET['addtag']);
 808         } elseif ($addtag) {
 809             $params['searchtags'] = trim($params['searchtags']).' '.trim($_GET['addtag']);
 810         }
 811
 812         // We also remove page (keeping the same page has no sense, since the
 813         // results are different)
 814         unset($params['page']);
 815
 816         header('Location: ?'.http_build_query($params));
 817         exit;
 818     }
 819
 820     // -------- User clicks on a tag in result count: Remove the tag from the list of searched tags (searchtags=...)
 821     if (isset($_GET['removetag'])) {
 822         // Get previous URL (http_referer) and remove the tag from the searchtags parameters in query.
 823         if (empty($_SERVER['HTTP_REFERER'])) {
 824             header('Location: ?');
 825             exit;
 826         }
 827
 828         // In case browser does not send HTTP_REFERER
 829         parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $params);
 830
 831         // Prevent redirection loop
 832         if (isset($params['removetag'])) {
 833             unset($params['removetag']);
 834         }
 835
 836         if (isset($params['searchtags'])) {
 837             $tags = explode(' ', $params['searchtags']);
 838             // Remove value from array $tags.
 839             $tags = array_diff($tags, array($_GET['removetag']));
 840             $params['searchtags'] = implode(' ', $tags);
 841
 842             if (empty($params['searchtags'])) {
 843                 unset($params['searchtags']);
 844             }
 845
 846             // We also remove page (keeping the same page has no sense, since
 847             // the results are different)
 848             unset($params['page']);
 849         }
 850         header('Location: ?'.http_build_query($params));
 851         exit;
 852     }
 853
 854     // -------- User wants to change the number of links per page (linksperpage=...)
 855     if (isset($_GET['linksperpage'])) {
 856         if (is_numeric($_GET['linksperpage'])) {
 857             $_SESSION['LINKS_PER_PAGE']=abs(intval($_GET['linksperpage']));
 858         }
 859
 860         if (! empty($_SERVER['HTTP_REFERER'])) {
 861             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('linksperpage'));
 862         } else {
 863             $location = '?';
 864         }
 865         header('Location: '. $location);
 866         exit;
 867     }
 868
 869     // -------- User wants to see only private links (toggle)
 870     if (isset($_GET['visibility'])) {
 871         if ($_GET['visibility'] === 'private') {
 872             // Visibility not set or not already private, set private, otherwise reset it
 873             if (empty($_SESSION['visibility']) || $_SESSION['visibility'] !== 'private') {
 874                 // See only private links
 875                 $_SESSION['visibility'] = 'private';
 876             } else {
 877                 unset($_SESSION['visibility']);
 878             }
 879         } elseif ($_GET['visibility'] === 'public') {
 880             if (empty($_SESSION['visibility']) || $_SESSION['visibility'] !== 'public') {
 881                 // See only public links
 882                 $_SESSION['visibility'] = 'public';
 883             } else {
 884                 unset($_SESSION['visibility']);
 885             }
 886         }
 887
 888         if (! empty($_SERVER['HTTP_REFERER'])) {
 889             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('visibility'));
 890         } else {
 891             $location = '?';
 892         }
 893         header('Location: '. $location);
 894         exit;
 895     }
 896
 897     // -------- User wants to see only untagged links (toggle)
 898     if (isset($_GET['untaggedonly'])) {
 899         $_SESSION['untaggedonly'] = empty($_SESSION['untaggedonly']);
 900
 901         if (! empty($_SERVER['HTTP_REFERER'])) {
 902             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('untaggedonly'));
 903         } else {
 904             $location = '?';
 905         }
 906         header('Location: '. $location);
 907         exit;
 908     }
 909
 910     // -------- Handle other actions allowed for non-logged in users:
 911     if (!$loginManager->isLoggedIn()) {
 912         // User tries to post new link but is not logged in:
 913         // Show login screen, then redirect to ?post=...
 914         if (isset($_GET['post'])) {
 915             header( // Redirect to login page, then back to post link.
 916                 'Location: ?do=login&post='.urlencode($_GET['post']).
 917                 (!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').
 918                 (!empty($_GET['description'])?'&description='.urlencode($_GET['description']):'').
 919                 (!empty($_GET['tags'])?'&tags='.urlencode($_GET['tags']):'').
 920                 (!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')
 921             );
 922             exit;
 923         }
 924
 925         showLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
 926         if (isset($_GET['edit_link'])) {
 927             header('Location: ?do=login&edit_link='. escape($_GET['edit_link']));
 928             exit;
 929         }
 930
 931         exit; // Never remove this one! All operations below are reserved for logged in user.
 932     }
 933
 934     // -------- All other functions are reserved for the registered user:
 935
 936     // -------- Display the Tools menu if requested (import/export/bookmarklet...)
 937     if ($targetPage == Router::$PAGE_TOOLS) {
 938         $data = [
 939             'pageabsaddr' => index_url($_SERVER),
 940             'sslenabled' => is_https($_SERVER),
 941         ];
 942         $pluginManager->executeHooks('render_tools', $data);
 943
 944         foreach ($data as $key => $value) {
 945             $PAGE->assign($key, $value);
 946         }
 947
 948         $PAGE->assign('pagetitle', t('Tools') .' - '. $conf->get('general.title', 'Shaarli'));
 949         $PAGE->renderPage('tools');
 950         exit;
 951     }
 952
 953     // -------- User wants to change his/her password.
 954     if ($targetPage == Router::$PAGE_CHANGEPASSWORD) {
 955         if ($conf->get('security.open_shaarli')) {
 956             die(t('You are not supposed to change a password on an Open Shaarli.'));
 957         }
 958
 959         if (!empty($_POST['setpassword']) && !empty($_POST['oldpassword'])) {
 960             if (!$sessionManager->checkToken($_POST['token'])) {
 961                 die(t('Wrong token.')); // Go away!
 962             }
 963
 964             // Make sure old password is correct.
 965             $oldhash = sha1(
 966                 $_POST['oldpassword'].$conf->get('credentials.login').$conf->get('credentials.salt')
 967             );
 968             if ($oldhash != $conf->get('credentials.hash')) {
 969                 echo '<script>alert("'
 970                     . t('The old password is not correct.')
 971                     .'");document.location=\'?do=changepasswd\';</script>';
 972                 exit;
 973             }
 974             // Save new password
 975             // Salt renders rainbow-tables attacks useless.
 976             $conf->set('credentials.salt', sha1(uniqid('', true) .'_'. mt_rand()));
 977             $conf->set(
 978                 'credentials.hash',
 979                 sha1(
 980                     $_POST['setpassword']
 981                     . $conf->get('credentials.login')
 982                     . $conf->get('credentials.salt')
 983                 )
 984             );
 985             try {
 986                 $conf->write($loginManager->isLoggedIn());
 987             } catch (Exception $e) {
 988                 error_log(
 989                     'ERROR while writing config file after changing password.' . PHP_EOL .
 990                     $e->getMessage()
 991                 );
 992
 993                 // TODO: do not handle exceptions/errors in JS.
 994                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=tools\';</script>';
 995                 exit;
 996             }
 997             echo '<script>alert("'. t('Your password has been changed') .'");document.location=\'?do=tools\';</script>';
 998             exit;
 999         } else {
1000             // show the change password form.
1001             $PAGE->assign('pagetitle', t('Change password') .' - '. $conf->get('general.title', 'Shaarli'));
1002             $PAGE->renderPage('changepassword');
1003             exit;
1004         }
1005     }
1006
1007     // -------- User wants to change configuration
1008     if ($targetPage == Router::$PAGE_CONFIGURE) {
1009         if (!empty($_POST['title'])) {
1010             if (!$sessionManager->checkToken($_POST['token'])) {
1011                 die(t('Wrong token.')); // Go away!
1012             }
1013             $tz = 'UTC';
1014             if (!empty($_POST['continent']) && !empty($_POST['city'])
1015                 && isTimeZoneValid($_POST['continent'], $_POST['city'])
1016             ) {
1017                 $tz = $_POST['continent'] . '/' . $_POST['city'];
1018             }
1019             $conf->set('general.timezone', $tz);
1020             $conf->set('general.title', escape($_POST['title']));
1021             $conf->set('general.header_link', escape($_POST['titleLink']));
1022             $conf->set('resource.theme', escape($_POST['theme']));
1023             $conf->set('security.session_protection_disabled', !empty($_POST['disablesessionprotection']));
1024             $conf->set('privacy.default_private_links', !empty($_POST['privateLinkByDefault']));
1025             $conf->set('feed.rss_permalinks', !empty($_POST['enableRssPermalinks']));
1026             $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1027             $conf->set('privacy.hide_public_links', !empty($_POST['hidePublicLinks']));
1028             $conf->set('api.enabled', !empty($_POST['enableApi']));
1029             $conf->set('api.secret', escape($_POST['apiSecret']));
1030             $conf->set('translation.language', escape($_POST['language']));
1031
1032             $thumbnailsMode = extension_loaded('gd') ? $_POST['enableThumbnails'] : Thumbnailer::MODE_NONE;
1033             if ($thumbnailsMode !== Thumbnailer::MODE_NONE
1034                 && $thumbnailsMode !== $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE)
1035             ) {
1036                 $_SESSION['warnings'][] = t(
1037                     'You have enabled or changed thumbnails mode. '
1038                     .'<a href="?do=thumbs_update">Please synchronize them</a>.'
1039                 );
1040             }
1041             $conf->set('thumbnails.mode', $thumbnailsMode);
1042
1043             try {
1044                 $conf->write($loginManager->isLoggedIn());
1045                 $history->updateSettings();
1046                 invalidateCaches($conf->get('resource.page_cache'));
1047             } catch (Exception $e) {
1048                 error_log(
1049                     'ERROR while writing config file after configuration update.' . PHP_EOL .
1050                     $e->getMessage()
1051                 );
1052
1053                 // TODO: do not handle exceptions/errors in JS.
1054                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=configure\';</script>';
1055                 exit;
1056             }
1057             echo '<script>alert("'. t('Configuration was saved.') .'");document.location=\'?do=configure\';</script>';
1058             exit;
1059         } else {
1060             // Show the configuration form.
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('thumbnails_mode', $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE));
1081             $PAGE->assign('pagetitle', t('Configure') .' - '. $conf->get('general.title', 'Shaarli'));
1082             $PAGE->renderPage('configure');
1083             exit;
1084         }
1085     }
1086
1087     // -------- User wants to rename a tag or delete it
1088     if ($targetPage == Router::$PAGE_CHANGETAG) {
1089         if (empty($_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         $toTag = isset($_POST['totag']) ? escape($_POST['totag']) : null;
1101         $alteredLinks = $LINKSDB->renameTag(escape($_POST['fromtag']), $toTag);
1102         $LINKSDB->save($conf->get('resource.page_cache'));
1103         foreach ($alteredLinks as $link) {
1104             $history->updateLink($link);
1105         }
1106         $delete = empty($_POST['totag']);
1107         $redirect = $delete ? 'do=changetag' : 'searchtags='. urlencode(escape($_POST['totag']));
1108         $count = count($alteredLinks);
1109         $alert = $delete
1110             ? sprintf(t('The tag was removed from %d link.', 'The tag was removed from %d links.', $count), $count)
1111             : sprintf(t('The tag was renamed in %d link.', 'The tag was renamed in %d links.', $count), $count);
1112         echo '<script>alert("'. $alert .'");document.location=\'?'. $redirect .'\';</script>';
1113         exit;
1114     }
1115
1116     // -------- User wants to add a link without using the bookmarklet: Show form.
1117     if ($targetPage == Router::$PAGE_ADDLINK) {
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         // Go away!
1126         if (! $sessionManager->checkToken($_POST['token'])) {
1127             die(t('Wrong token.'));
1128         }
1129
1130         // lf_id should only be present if the link exists.
1131         $id = isset($_POST['lf_id']) ? intval(escape($_POST['lf_id'])) : $LINKSDB->getNextId();
1132         // Linkdate is kept here to:
1133         //   - use the same permalink for notes as they're displayed when creating them
1134         //   - let users hack creation date of their posts
1135         //     See: https://shaarli.readthedocs.io/en/master/guides/various-hacks/#changing-the-timestamp-for-a-shaare
1136         $linkdate = escape($_POST['lf_linkdate']);
1137         if (isset($LINKSDB[$id])) {
1138             // Edit
1139             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1140             $updated = new DateTime();
1141             $shortUrl = $LINKSDB[$id]['shorturl'];
1142             $new = false;
1143         } else {
1144             // New link
1145             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1146             $updated = null;
1147             $shortUrl = link_small_hash($created, $id);
1148             $new = true;
1149         }
1150
1151         // Remove multiple spaces.
1152         $tags = trim(preg_replace('/\s\s+/', ' ', $_POST['lf_tags']));
1153         // Remove first '-' char in tags.
1154         $tags = preg_replace('/(^| )\-/', '$1', $tags);
1155         // Remove duplicates.
1156         $tags = implode(' ', array_unique(explode(' ', $tags)));
1157
1158         if (empty(trim($_POST['lf_url']))) {
1159             $_POST['lf_url'] = '?' . smallHash($linkdate . $id);
1160         }
1161         $url = whitelist_protocols(trim($_POST['lf_url']), $conf->get('security.allowed_protocols'));
1162
1163         $link = array(
1164             'id' => $id,
1165             'title' => trim($_POST['lf_title']),
1166             'url' => $url,
1167             'description' => $_POST['lf_description'],
1168             'private' => (isset($_POST['lf_private']) ? 1 : 0),
1169             'created' => $created,
1170             'updated' => $updated,
1171             'tags' => str_replace(',', ' ', $tags),
1172             'shorturl' => $shortUrl,
1173         );
1174
1175         // If title is empty, use the URL as title.
1176         if ($link['title'] == '') {
1177             $link['title'] = $link['url'];
1178         }
1179
1180         if ($conf->get('thumbnails.mode', Thumbnailer::MODE_NONE) !== Thumbnailer::MODE_NONE) {
1181             $thumbnailer = new Thumbnailer($conf);
1182             $link['thumbnail'] = $thumbnailer->get($url);
1183         }
1184
1185         $pluginManager->executeHooks('save_link', $link);
1186
1187         $LINKSDB[$id] = $link;
1188         $LINKSDB->save($conf->get('resource.page_cache'));
1189         if ($new) {
1190             $history->addLink($link);
1191         } else {
1192             $history->updateLink($link);
1193         }
1194
1195         // If we are called from the bookmarklet, we must close the popup:
1196         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1197             echo '<script>self.close();</script>';
1198             exit;
1199         }
1200
1201         $returnurl = !empty($_POST['returnurl']) ? $_POST['returnurl'] : '?';
1202         $location = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1203         // Scroll to the link which has been edited.
1204         $location .= '#' . $link['shorturl'];
1205         // After saving the link, redirect to the page the user was on.
1206         header('Location: '. $location);
1207         exit;
1208     }
1209
1210     // -------- User clicked the "Cancel" button when editing a link.
1211     if (isset($_POST['cancel_edit'])) {
1212         $id = isset($_POST['lf_id']) ? (int) escape($_POST['lf_id']) : false;
1213         if (! isset($LINKSDB[$id])) {
1214             header('Location: ?');
1215         }
1216         // If we are called from the bookmarklet, we must close the popup:
1217         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1218             echo '<script>self.close();</script>';
1219             exit;
1220         }
1221         $link = $LINKSDB[$id];
1222         $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
1223         // Scroll to the link which has been edited.
1224         $returnurl .= '#'. $link['shorturl'];
1225         $returnurl = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1226         header('Location: '.$returnurl); // After canceling, redirect to the page the user was on.
1227         exit;
1228     }
1229
1230     // -------- User clicked the "Delete" button when editing a link: Delete link from database.
1231     if ($targetPage == Router::$PAGE_DELETELINK) {
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             $history->deleteLink($link);
1253             unset($LINKSDB[$id]);
1254         }
1255         $LINKSDB->save($conf->get('resource.page_cache')); // save to disk
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')) {
1259             echo '<script>self.close();</script>';
1260             exit;
1261         }
1262
1263         $location = '?';
1264         if (isset($_SERVER['HTTP_REFERER'])) {
1265             // Don't redirect to where we were previously if it was a permalink or an edit_link, because it would 404.
1266             $location = generateLocation(
1267                 $_SERVER['HTTP_REFERER'],
1268                 $_SERVER['HTTP_HOST'],
1269                 ['delete_link', 'edit_link', $link['shorturl']]
1270             );
1271         }
1272
1273         header('Location: ' . $location); // After deleting the link, redirect to appropriate location
1274         exit;
1275     }
1276
1277     // -------- User clicked the "EDIT" button on a link: Display link edit form.
1278     if (isset($_GET['edit_link'])) {
1279         $id = (int) escape($_GET['edit_link']);
1280         $link = $LINKSDB[$id];  // Read database
1281         if (!$link) {
1282             header('Location: ?');
1283             exit;
1284         } // Link not found in database.
1285         $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1286         $data = array(
1287             'link' => $link,
1288             'link_is_new' => false,
1289             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1290             'tags' => $LINKSDB->linksCountPerTag(),
1291         );
1292         $pluginManager->executeHooks('render_editlink', $data);
1293
1294         foreach ($data as $key => $value) {
1295             $PAGE->assign($key, $value);
1296         }
1297
1298         $PAGE->assign('pagetitle', t('Edit') .' '. t('Shaare') .' - '. $conf->get('general.title', 'Shaarli'));
1299         $PAGE->renderPage('editlink');
1300         exit;
1301     }
1302
1303     // -------- User want to post a new link: Display link edit form.
1304     if (isset($_GET['post'])) {
1305         $url = cleanup_url($_GET['post']);
1306
1307         $link_is_new = false;
1308         // Check if URL is not already in database (in this case, we will edit the existing link)
1309         $link = $LINKSDB->getLinkFromUrl($url);
1310         if (! $link) {
1311             $link_is_new = true;
1312             $linkdate = strval(date(LinkDB::LINK_DATE_FORMAT));
1313             // Get title if it was provided in URL (by the bookmarklet).
1314             $title = empty($_GET['title']) ? '' : escape($_GET['title']);
1315             // Get description if it was provided in URL (by the bookmarklet). [Bronco added that]
1316             $description = empty($_GET['description']) ? '' : escape($_GET['description']);
1317             $tags = empty($_GET['tags']) ? '' : escape($_GET['tags']);
1318             $private = !empty($_GET['private']) && $_GET['private'] === "1" ? 1 : 0;
1319
1320             // If this is an HTTP(S) link, we try go get the page to extract
1321             // the title (otherwise we will to straight to the edit form.)
1322             if (empty($title) && strpos(get_url_scheme($url), 'http') !== false) {
1323                 // Short timeout to keep the application responsive
1324                 // The callback will fill $charset and $title with data from the downloaded page.
1325                 get_http_response(
1326                     $url,
1327                     $conf->get('general.download_timeout', 30),
1328                     $conf->get('general.download_max_size', 4194304),
1329                     get_curl_download_callback($charset, $title)
1330                 );
1331                 if (! empty($title) && strtolower($charset) != 'utf-8') {
1332                     $title = mb_convert_encoding($title, 'utf-8', $charset);
1333                 }
1334             }
1335
1336             if ($url == '') {
1337                 $url = '?' . smallHash($linkdate . $LINKSDB->getNextId());
1338                 $title = $conf->get('general.default_note_title', t('Note: '));
1339             }
1340             $url = escape($url);
1341             $title = escape($title);
1342
1343             $link = array(
1344                 'linkdate' => $linkdate,
1345                 'title' => $title,
1346                 'url' => $url,
1347                 'description' => $description,
1348                 'tags' => $tags,
1349                 'private' => $private,
1350             );
1351         } else {
1352             $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1353         }
1354
1355         $data = array(
1356             'link' => $link,
1357             'link_is_new' => $link_is_new,
1358             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1359             'source' => (isset($_GET['source']) ? $_GET['source'] : ''),
1360             'tags' => $LINKSDB->linksCountPerTag(),
1361             'default_private_links' => $conf->get('privacy.default_private_links', false),
1362         );
1363         $pluginManager->executeHooks('render_editlink', $data);
1364
1365         foreach ($data as $key => $value) {
1366             $PAGE->assign($key, $value);
1367         }
1368
1369         $PAGE->assign('pagetitle', t('Shaare') .' - '. $conf->get('general.title', 'Shaarli'));
1370         $PAGE->renderPage('editlink');
1371         exit;
1372     }
1373
1374     if ($targetPage == Router::$PAGE_PINLINK) {
1375         if (! isset($_GET['id']) || empty($LINKSDB[$_GET['id']])) {
1376             // FIXME! Use a proper error system.
1377             $msg = t('Invalid link ID provided');
1378             echo '<script>alert("'. $msg .'");document.location=\''. index_url($_SERVER) .'\';</script>';
1379             exit;
1380         }
1381         if (! $sessionManager->checkToken($_GET['token'])) {
1382             die('Wrong token.');
1383         }
1384
1385         $link = $LINKSDB[$_GET['id']];
1386         $link['sticky'] = ! $link['sticky'];
1387         $LINKSDB[(int) $_GET['id']] = $link;
1388         $LINKSDB->save($conf->get('resource.page_cache'));
1389         header('Location: '.index_url($_SERVER));
1390         exit;
1391     }
1392
1393     if ($targetPage == Router::$PAGE_EXPORT) {
1394         // Export links as a Netscape Bookmarks file
1395
1396         if (empty($_GET['selection'])) {
1397             $PAGE->assign('pagetitle', t('Export') .' - '. $conf->get('general.title', 'Shaarli'));
1398             $PAGE->renderPage('export');
1399             exit;
1400         }
1401
1402         // export as bookmarks_(all|private|public)_YYYYmmdd_HHMMSS.html
1403         $selection = $_GET['selection'];
1404         if (isset($_GET['prepend_note_url'])) {
1405             $prependNoteUrl = $_GET['prepend_note_url'];
1406         } else {
1407             $prependNoteUrl = false;
1408         }
1409
1410         try {
1411             $PAGE->assign(
1412                 'links',
1413                 NetscapeBookmarkUtils::filterAndFormat(
1414                     $LINKSDB,
1415                     $selection,
1416                     $prependNoteUrl,
1417                     index_url($_SERVER)
1418                 )
1419             );
1420         } catch (Exception $exc) {
1421             header('Content-Type: text/plain; charset=utf-8');
1422             echo $exc->getMessage();
1423             exit;
1424         }
1425         $now = new DateTime();
1426         header('Content-Type: text/html; charset=utf-8');
1427         header(
1428             'Content-disposition: attachment; filename=bookmarks_'
1429             .$selection.'_'.$now->format(LinkDB::LINK_DATE_FORMAT).'.html'
1430         );
1431         $PAGE->assign('date', $now->format(DateTime::RFC822));
1432         $PAGE->assign('eol', PHP_EOL);
1433         $PAGE->assign('selection', $selection);
1434         $PAGE->renderPage('export.bookmarks');
1435         exit;
1436     }
1437
1438     if ($targetPage == Router::$PAGE_IMPORT) {
1439         // Upload a Netscape bookmark dump to import its contents
1440
1441         if (! isset($_POST['token']) || ! isset($_FILES['filetoupload'])) {
1442             // Show import dialog
1443             $PAGE->assign(
1444                 'maxfilesize',
1445                 get_max_upload_size(
1446                     ini_get('post_max_size'),
1447                     ini_get('upload_max_filesize'),
1448                     false
1449                 )
1450             );
1451             $PAGE->assign(
1452                 'maxfilesizeHuman',
1453                 get_max_upload_size(
1454                     ini_get('post_max_size'),
1455                     ini_get('upload_max_filesize'),
1456                     true
1457                 )
1458             );
1459             $PAGE->assign('pagetitle', t('Import') .' - '. $conf->get('general.title', 'Shaarli'));
1460             $PAGE->renderPage('import');
1461             exit;
1462         }
1463
1464         // Import bookmarks from an uploaded file
1465         if (isset($_FILES['filetoupload']['size']) && $_FILES['filetoupload']['size'] == 0) {
1466             // The file is too big or some form field may be missing.
1467             $msg = sprintf(
1468                 t(
1469                     'The file you are trying to upload is probably bigger than what this webserver can accept'
1470                     .' (%s). Please upload in smaller chunks.'
1471                 ),
1472                 get_max_upload_size(ini_get('post_max_size'), ini_get('upload_max_filesize'))
1473             );
1474             echo '<script>alert("'. $msg .'");document.location=\'?do='.Router::$PAGE_IMPORT .'\';</script>';
1475             exit;
1476         }
1477         if (! $sessionManager->checkToken($_POST['token'])) {
1478             die('Wrong token.');
1479         }
1480         $status = NetscapeBookmarkUtils::import(
1481             $_POST,
1482             $_FILES,
1483             $LINKSDB,
1484             $conf,
1485             $history
1486         );
1487         echo '<script>alert("'.$status.'");document.location=\'?do='
1488              .Router::$PAGE_IMPORT .'\';</script>';
1489         exit;
1490     }
1491
1492     // Plugin administration page
1493     if ($targetPage == Router::$PAGE_PLUGINSADMIN) {
1494         $pluginMeta = $pluginManager->getPluginsMeta();
1495
1496         // Split plugins into 2 arrays: ordered enabled plugins and disabled.
1497         $enabledPlugins = array_filter($pluginMeta, function ($v) {
1498             return $v['order'] !== false;
1499         });
1500         // Load parameters.
1501         $enabledPlugins = load_plugin_parameter_values($enabledPlugins, $conf->get('plugins', array()));
1502         uasort(
1503             $enabledPlugins,
1504             function ($a, $b) {
1505                 return $a['order'] - $b['order'];
1506             }
1507         );
1508         $disabledPlugins = array_filter($pluginMeta, function ($v) {
1509             return $v['order'] === false;
1510         });
1511
1512         $PAGE->assign('enabledPlugins', $enabledPlugins);
1513         $PAGE->assign('disabledPlugins', $disabledPlugins);
1514         $PAGE->assign('pagetitle', t('Plugin administration') .' - '. $conf->get('general.title', 'Shaarli'));
1515         $PAGE->renderPage('pluginsadmin');
1516         exit;
1517     }
1518
1519     // Plugin administration form action
1520     if ($targetPage == Router::$PAGE_SAVE_PLUGINSADMIN) {
1521         try {
1522             if (isset($_POST['parameters_form'])) {
1523                 unset($_POST['parameters_form']);
1524                 foreach ($_POST as $param => $value) {
1525                     $conf->set('plugins.'. $param, escape($value));
1526                 }
1527             } else {
1528                 $conf->set('general.enabled_plugins', save_plugin_config($_POST));
1529             }
1530             $conf->write($loginManager->isLoggedIn());
1531             $history->updateSettings();
1532         } catch (Exception $e) {
1533             error_log(
1534                 'ERROR while saving plugin configuration:.' . PHP_EOL .
1535                 $e->getMessage()
1536             );
1537
1538             // TODO: do not handle exceptions/errors in JS.
1539             echo '<script>alert("'
1540                 . $e->getMessage()
1541                 .'");document.location=\'?do='
1542                 . Router::$PAGE_PLUGINSADMIN
1543                 .'\';</script>';
1544             exit;
1545         }
1546         header('Location: ?do='. Router::$PAGE_PLUGINSADMIN);
1547         exit;
1548     }
1549
1550     // Get a fresh token
1551     if ($targetPage == Router::$GET_TOKEN) {
1552         header('Content-Type:text/plain');
1553         echo $sessionManager->generateToken($conf);
1554         exit;
1555     }
1556
1557     // -------- Thumbnails Update
1558     if ($targetPage == Router::$PAGE_THUMBS_UPDATE) {
1559         $ids = [];
1560         foreach ($LINKSDB as $link) {
1561             // A note or not HTTP(S)
1562             if ($link['url'][0] === '?' || ! startsWith(strtolower($link['url']), 'http')) {
1563                 continue;
1564             }
1565             $ids[] = $link['id'];
1566         }
1567         $PAGE->assign('ids', $ids);
1568         $PAGE->assign('pagetitle', t('Thumbnails update') .' - '. $conf->get('general.title', 'Shaarli'));
1569         $PAGE->renderPage('thumbnails');
1570         exit;
1571     }
1572
1573     // -------- Single Thumbnail Update
1574     if ($targetPage == Router::$AJAX_THUMB_UPDATE) {
1575         if (! isset($_POST['id']) || ! ctype_digit($_POST['id'])) {
1576             http_response_code(400);
1577             exit;
1578         }
1579         $id = (int) $_POST['id'];
1580         if (empty($LINKSDB[$id])) {
1581             http_response_code(404);
1582             exit;
1583         }
1584         $thumbnailer = new Thumbnailer($conf);
1585         $link = $LINKSDB[$id];
1586         $link['thumbnail'] = $thumbnailer->get($link['url']);
1587         $LINKSDB[$id] = $link;
1588         $LINKSDB->save($conf->get('resource.page_cache'));
1589
1590         echo json_encode($link);
1591         exit;
1592     }
1593
1594     // -------- Otherwise, simply display search form and links:
1595     showLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
1596     exit;
1597 }
1598
1599 /**
1600  * Template for the list of links (<div id="linklist">)
1601  * This function fills all the necessary fields in the $PAGE for the template 'linklist.html'
1602  *
1603  * @param pageBuilder   $PAGE          pageBuilder instance.
1604  * @param LinkDB        $LINKSDB       LinkDB instance.
1605  * @param ConfigManager $conf          Configuration Manager instance.
1606  * @param PluginManager $pluginManager Plugin Manager instance.
1607  * @param LoginManager  $loginManager  LoginManager instance
1608  */
1609 function buildLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager)
1610 {
1611     // Used in templates
1612     if (isset($_GET['searchtags'])) {
1613         if (! empty($_GET['searchtags'])) {
1614             $searchtags = escape(normalize_spaces($_GET['searchtags']));
1615         } else {
1616             $searchtags = false;
1617         }
1618     } else {
1619         $searchtags = '';
1620     }
1621     $searchterm = !empty($_GET['searchterm']) ? escape(normalize_spaces($_GET['searchterm'])) : '';
1622
1623     // Smallhash filter
1624     if (! empty($_SERVER['QUERY_STRING'])
1625         && preg_match('/^[a-zA-Z0-9-_@]{6}($|&|#)/', $_SERVER['QUERY_STRING'])) {
1626         try {
1627             $linksToDisplay = $LINKSDB->filterHash($_SERVER['QUERY_STRING']);
1628         } catch (LinkNotFoundException $e) {
1629             $PAGE->render404($e->getMessage());
1630             exit;
1631         }
1632     } else {
1633         // Filter links according search parameters.
1634         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
1635         $request = [
1636             'searchtags' => $searchtags,
1637             'searchterm' => $searchterm,
1638         ];
1639         $linksToDisplay = $LINKSDB->filterSearch($request, false, $visibility, !empty($_SESSION['untaggedonly']));
1640     }
1641
1642     // ---- Handle paging.
1643     $keys = array();
1644     foreach ($linksToDisplay as $key => $value) {
1645         $keys[] = $key;
1646     }
1647
1648     // Select articles according to paging.
1649     $pagecount = ceil(count($keys) / $_SESSION['LINKS_PER_PAGE']);
1650     $pagecount = $pagecount == 0 ? 1 : $pagecount;
1651     $page= empty($_GET['page']) ? 1 : intval($_GET['page']);
1652     $page = $page < 1 ? 1 : $page;
1653     $page = $page > $pagecount ? $pagecount : $page;
1654     // Start index.
1655     $i = ($page-1) * $_SESSION['LINKS_PER_PAGE'];
1656     $end = $i + $_SESSION['LINKS_PER_PAGE'];
1657
1658     $thumbnailsEnabled = $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE) !== Thumbnailer::MODE_NONE;
1659     if ($thumbnailsEnabled) {
1660         $thumbnailer = new Thumbnailer($conf);
1661     }
1662
1663     $linkDisp = array();
1664     while ($i<$end && $i<count($keys)) {
1665         $link = $linksToDisplay[$keys[$i]];
1666         $link['description'] = format_description(
1667             $link['description'],
1668             $conf->get('redirector.url'),
1669             $conf->get('redirector.encode_url')
1670         );
1671         $classLi =  ($i % 2) != 0 ? '' : 'publicLinkHightLight';
1672         $link['class'] = $link['private'] == 0 ? $classLi : 'private';
1673         $link['timestamp'] = $link['created']->getTimestamp();
1674         if (! empty($link['updated'])) {
1675             $link['updated_timestamp'] = $link['updated']->getTimestamp();
1676         } else {
1677             $link['updated_timestamp'] = '';
1678         }
1679         $taglist = preg_split('/\s+/', $link['tags'], -1, PREG_SPLIT_NO_EMPTY);
1680         uasort($taglist, 'strcasecmp');
1681         $link['taglist'] = $taglist;
1682
1683         // Logged in, thumbnails enabled, not a note,
1684         // and (never retrieved yet or no valid cache file)
1685         if ($loginManager->isLoggedIn() && $thumbnailsEnabled && $link['url'][0] != '?'
1686             && (! isset($link['thumbnail']) || ($link['thumbnail'] !== false && ! is_file($link['thumbnail'])))
1687         ) {
1688             $elem = $LINKSDB[$keys[$i]];
1689             $elem['thumbnail'] = $thumbnailer->get($link['url']);
1690             $LINKSDB[$keys[$i]] = $elem;
1691             $updateDB = true;
1692             $link['thumbnail'] = $elem['thumbnail'];
1693         }
1694
1695         // Check for both signs of a note: starting with ? and 7 chars long.
1696         if ($link['url'][0] === '?' && strlen($link['url']) === 7) {
1697             $link['url'] = index_url($_SERVER) . $link['url'];
1698         }
1699
1700         $linkDisp[$keys[$i]] = $link;
1701         $i++;
1702     }
1703
1704     // If we retrieved new thumbnails, we update the database.
1705     if (!empty($updateDB)) {
1706         $LINKSDB->save($conf->get('resource.page_cache'));
1707     }
1708
1709     // Compute paging navigation
1710     $searchtagsUrl = $searchtags === '' ? '' : '&searchtags=' . urlencode($searchtags);
1711     $searchtermUrl = empty($searchterm) ? '' : '&searchterm=' . urlencode($searchterm);
1712     $previous_page_url = '';
1713     if ($i != count($keys)) {
1714         $previous_page_url = '?page=' . ($page+1) . $searchtermUrl . $searchtagsUrl;
1715     }
1716     $next_page_url='';
1717     if ($page>1) {
1718         $next_page_url = '?page=' . ($page-1) . $searchtermUrl . $searchtagsUrl;
1719     }
1720
1721     // Fill all template fields.
1722     $data = array(
1723         'previous_page_url' => $previous_page_url,
1724         'next_page_url' => $next_page_url,
1725         'page_current' => $page,
1726         'page_max' => $pagecount,
1727         'result_count' => count($linksToDisplay),
1728         'search_term' => $searchterm,
1729         'search_tags' => $searchtags,
1730         'visibility' => ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '',
1731         'redirector' => $conf->get('redirector.url'),  // Optional redirector URL.
1732         'links' => $linkDisp,
1733     );
1734
1735     // If there is only a single link, we change on-the-fly the title of the page.
1736     if (count($linksToDisplay) == 1) {
1737         $data['pagetitle'] = $linksToDisplay[$keys[0]]['title'] .' - '. $conf->get('general.title');
1738     } elseif (! empty($searchterm) || ! empty($searchtags)) {
1739         $data['pagetitle'] = t('Search: ');
1740         $data['pagetitle'] .= ! empty($searchterm) ? $searchterm .' ' : '';
1741         $bracketWrap = function ($tag) {
1742             return '['. $tag .']';
1743         };
1744         $data['pagetitle'] .= ! empty($searchtags)
1745             ? implode(' ', array_map($bracketWrap, preg_split('/\s+/', $searchtags))).' '
1746             : '';
1747         $data['pagetitle'] .= '- '. $conf->get('general.title');
1748     }
1749
1750     $pluginManager->executeHooks('render_linklist', $data, array('loggedin' => $loginManager->isLoggedIn()));
1751
1752     foreach ($data as $key => $value) {
1753         $PAGE->assign($key, $value);
1754     }
1755
1756     return;
1757 }
1758
1759 /**
1760  * Installation
1761  * This function should NEVER be called if the file data/config.php exists.
1762  *
1763  * @param ConfigManager  $conf           Configuration Manager instance.
1764  * @param SessionManager $sessionManager SessionManager instance
1765  * @param LoginManager   $loginManager   LoginManager instance
1766  */
1767 function install($conf, $sessionManager, $loginManager)
1768 {
1769     // On free.fr host, make sure the /sessions directory exists, otherwise login will not work.
1770     if (endsWith($_SERVER['HTTP_HOST'], '.free.fr') && !is_dir($_SERVER['DOCUMENT_ROOT'].'/sessions')) {
1771         mkdir($_SERVER['DOCUMENT_ROOT'].'/sessions', 0705);
1772     }
1773
1774
1775     // This part makes sure sessions works correctly.
1776     // (Because on some hosts, session.save_path may not be set correctly,
1777     // or we may not have write access to it.)
1778     if (isset($_GET['test_session'])
1779         && ( !isset($_SESSION) || !isset($_SESSION['session_tested']) || $_SESSION['session_tested']!='Working')) {
1780         // Step 2: Check if data in session is correct.
1781         $msg = t(
1782             '<pre>Sessions do not seem to work correctly on your server.<br>'.
1783             'Make sure the variable "session.save_path" is set correctly in your PHP config, '.
1784             'and that you have write access to it.<br>'.
1785             'It currently points to %s.<br>'.
1786             'On some browsers, accessing your server via a hostname like \'localhost\' '.
1787             'or any custom hostname without a dot causes cookie storage to fail. '.
1788             'We recommend accessing your server via it\'s IP address or Fully Qualified Domain Name.<br>'
1789         );
1790         $msg = sprintf($msg, session_save_path());
1791         echo $msg;
1792         echo '<br><a href="?">'. t('Click to try again.') .'</a></pre>';
1793         die;
1794     }
1795     if (!isset($_SESSION['session_tested'])) {
1796         // Step 1 : Try to store data in session and reload page.
1797         $_SESSION['session_tested'] = 'Working';  // Try to set a variable in session.
1798         header('Location: '.index_url($_SERVER).'?test_session');  // Redirect to check stored data.
1799     }
1800     if (isset($_GET['test_session'])) {
1801         // Step 3: Sessions are OK. Remove test parameter from URL.
1802         header('Location: '.index_url($_SERVER));
1803     }
1804
1805
1806     if (!empty($_POST['setlogin']) && !empty($_POST['setpassword'])) {
1807         $tz = 'UTC';
1808         if (!empty($_POST['continent']) && !empty($_POST['city'])
1809             && isTimeZoneValid($_POST['continent'], $_POST['city'])
1810         ) {
1811             $tz = $_POST['continent'].'/'.$_POST['city'];
1812         }
1813         $conf->set('general.timezone', $tz);
1814         $login = $_POST['setlogin'];
1815         $conf->set('credentials.login', $login);
1816         $salt = sha1(uniqid('', true) .'_'. mt_rand());
1817         $conf->set('credentials.salt', $salt);
1818         $conf->set('credentials.hash', sha1($_POST['setpassword'] . $login . $salt));
1819         if (!empty($_POST['title'])) {
1820             $conf->set('general.title', escape($_POST['title']));
1821         } else {
1822             $conf->set('general.title', 'Shared links on '.escape(index_url($_SERVER)));
1823         }
1824         $conf->set('translation.language', escape($_POST['language']));
1825         $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1826         $conf->set('api.enabled', !empty($_POST['enableApi']));
1827         $conf->set(
1828             'api.secret',
1829             generate_api_secret(
1830                 $conf->get('credentials.login'),
1831                 $conf->get('credentials.salt')
1832             )
1833         );
1834         try {
1835             // Everything is ok, let's create config file.
1836             $conf->write($loginManager->isLoggedIn());
1837         } catch (Exception $e) {
1838             error_log(
1839                 'ERROR while writing config file after installation.' . PHP_EOL .
1840                     $e->getMessage()
1841             );
1842
1843             // TODO: do not handle exceptions/errors in JS.
1844             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?\';</script>';
1845             exit;
1846         }
1847         echo '<script>alert('
1848             .'"Shaarli is now configured. '
1849             .'Please enter your login/password and start shaaring your links!"'
1850             .');document.location=\'?do=login\';</script>';
1851         exit;
1852     }
1853
1854     $PAGE = new PageBuilder($conf, $_SESSION, null, $sessionManager->generateToken());
1855     list($continents, $cities) = generateTimeZoneData(timezone_identifiers_list(), date_default_timezone_get());
1856     $PAGE->assign('continents', $continents);
1857     $PAGE->assign('cities', $cities);
1858     $PAGE->assign('languages', Languages::getAvailableLanguages());
1859     $PAGE->renderPage('install');
1860     exit;
1861 }
1862
1863 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=dailyrss')) {
1864     showDailyRSS($conf, $loginManager);
1865     exit;
1866 }
1867
1868 if (!isset($_SESSION['LINKS_PER_PAGE'])) {
1869     $_SESSION['LINKS_PER_PAGE'] = $conf->get('general.links_per_page', 20);
1870 }
1871
1872 try {
1873     $history = new History($conf->get('resource.history'));
1874 } catch (Exception $e) {
1875     die($e->getMessage());
1876 }
1877
1878 $linkDb = new LinkDB(
1879     $conf->get('resource.datastore'),
1880     $loginManager->isLoggedIn(),
1881     $conf->get('privacy.hide_public_links'),
1882     $conf->get('redirector.url'),
1883     $conf->get('redirector.encode_url')
1884 );
1885
1886 $container = new \Slim\Container();
1887 $container['conf'] = $conf;
1888 $container['plugins'] = $pluginManager;
1889 $container['history'] = $history;
1890 $app = new \Slim\App($container);
1891
1892 // REST API routes
1893 $app->group('/api/v1', function () {
1894     $this->get('/info', '\Shaarli\Api\Controllers\Info:getInfo')->setName('getInfo');
1895     $this->get('/links', '\Shaarli\Api\Controllers\Links:getLinks')->setName('getLinks');
1896     $this->get('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:getLink')->setName('getLink');
1897     $this->post('/links', '\Shaarli\Api\Controllers\Links:postLink')->setName('postLink');
1898     $this->put('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:putLink')->setName('putLink');
1899     $this->delete('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:deleteLink')->setName('deleteLink');
1900
1901     $this->get('/tags', '\Shaarli\Api\Controllers\Tags:getTags')->setName('getTags');
1902     $this->get('/tags/{tagName:[\w]+}', '\Shaarli\Api\Controllers\Tags:getTag')->setName('getTag');
1903     $this->put('/tags/{tagName:[\w]+}', '\Shaarli\Api\Controllers\Tags:putTag')->setName('putTag');
1904     $this->delete('/tags/{tagName:[\w]+}', '\Shaarli\Api\Controllers\Tags:deleteTag')->setName('deleteTag');
1905
1906     $this->get('/history', '\Shaarli\Api\Controllers\History:getHistory')->setName('getHistory');
1907 })->add('\Shaarli\Api\ApiMiddleware');
1908
1909 $response = $app->run(true);
1910
1911 // Hack to make Slim and Shaarli router work together:
1912 // If a Slim route isn't found and NOT API call, we call renderPage().
1913 if ($response->getStatusCode() == 404 && strpos($_SERVER['REQUEST_URI'], '/api/v1') === false) {
1914     // We use UTF-8 for proper international characters handling.
1915     header('Content-Type: text/html; charset=utf-8');
1916     renderPage($conf, $pluginManager, $linkDb, $history, $sessionManager, $loginManager);
1917 } else {
1918     $response = $response
1919         ->withHeader('Access-Control-Allow-Origin', '*')
1920         ->withHeader(
1921             'Access-Control-Allow-Headers',
1922             'X-Requested-With, Content-Type, Accept, Origin, Authorization'
1923         )
1924         ->withHeader('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE, OPTIONS');
1925     $app->respond($response);
1926 }