index.php

   1 <?php
   2 /**
   3  * Shaarli - The personal, minimalist, super-fast, database free, bookmarking service.
   4  *
   5  * Friendly fork by the Shaarli community:
   6  *  - https://github.com/shaarli/Shaarli
   7  *
   8  * Original project by sebsauvage.net:
   9  *  - http://sebsauvage.net/wiki/doku.php?id=php:shaarli
  10  *  - https://github.com/sebsauvage/Shaarli
  11  *
  12  * Licence: http://www.opensource.org/licenses/zlib-license.php
  13  *
  14  * Requires: PHP 5.5.x
  15  */
  16
  17 // Set 'UTC' as the default timezone if it is not defined in php.ini
  18 // See http://php.net/manual/en/datetime.configuration.php#ini.date.timezone
  19 if (date_default_timezone_get() == '') {
  20     date_default_timezone_set('UTC');
  21 }
  22
  23 /*
  24  * PHP configuration
  25  */
  26
  27 // http://server.com/x/shaarli --> /shaarli/
  28 define('WEB_PATH', substr($_SERVER['REQUEST_URI'], 0, 1+strrpos($_SERVER['REQUEST_URI'], '/', 0)));
  29
  30 // High execution time in case of problematic imports/exports.
  31 ini_set('max_input_time', '60');
  32
  33 // Try to set max upload file size and read
  34 ini_set('memory_limit', '128M');
  35 ini_set('post_max_size', '16M');
  36 ini_set('upload_max_filesize', '16M');
  37
  38 // See all error except warnings
  39 error_reporting(E_ALL^E_WARNING);
  40 // See all errors (for debugging only)
  41 //error_reporting(-1);
  42
  43
  44 // 3rd-party libraries
  45 if (! file_exists(__DIR__ . '/vendor/autoload.php')) {
  46     header('Content-Type: text/plain; charset=utf-8');
  47     echo "Error: missing Composer configuration\n\n"
  48         ."If you installed Shaarli through Git or using the development branch,\n"
  49         ."please refer to the installation documentation to install PHP"
  50         ." dependencies using Composer:\n"
  51         ."- https://shaarli.readthedocs.io/en/master/Server-configuration/\n"
  52         ."- https://shaarli.readthedocs.io/en/master/Download-and-Installation/";
  53     exit;
  54 }
  55 require_once 'inc/rain.tpl.class.php';
  56 require_once __DIR__ . '/vendor/autoload.php';
  57
  58 // Shaarli library
  59 require_once 'application/ApplicationUtils.php';
  60 require_once 'application/Cache.php';
  61 require_once 'application/CachedPage.php';
  62 require_once 'application/config/ConfigPlugin.php';
  63 require_once 'application/FeedBuilder.php';
  64 require_once 'application/FileUtils.php';
  65 require_once 'application/History.php';
  66 require_once 'application/HttpUtils.php';
  67 require_once 'application/LinkDB.php';
  68 require_once 'application/LinkFilter.php';
  69 require_once 'application/LinkUtils.php';
  70 require_once 'application/NetscapeBookmarkUtils.php';
  71 require_once 'application/PageBuilder.php';
  72 require_once 'application/TimeZone.php';
  73 require_once 'application/Url.php';
  74 require_once 'application/Utils.php';
  75 require_once 'application/PluginManager.php';
  76 require_once 'application/Router.php';
  77 require_once 'application/Updater.php';
  78 use \Shaarli\Config\ConfigManager;
  79 use \Shaarli\Languages;
  80 use \Shaarli\Security\LoginManager;
  81 use \Shaarli\Security\SessionManager;
  82 use \Shaarli\ThemeUtils;
  83 use \Shaarli\Thumbnailer;
  84
  85 // Ensure the PHP version is supported
  86 try {
  87     ApplicationUtils::checkPHPVersion('5.5', PHP_VERSION);
  88 } catch (Exception $exc) {
  89     header('Content-Type: text/plain; charset=utf-8');
  90     echo $exc->getMessage();
  91     exit;
  92 }
  93
  94 define('SHAARLI_VERSION', ApplicationUtils::getVersion(__DIR__ .'/'. ApplicationUtils::$VERSION_FILE));
  95
  96 // Force cookie path (but do not change lifetime)
  97 $cookie = session_get_cookie_params();
  98 $cookiedir = '';
  99 if (dirname($_SERVER['SCRIPT_NAME']) != '/') {
 100     $cookiedir = dirname($_SERVER["SCRIPT_NAME"]).'/';
 101 }
 102 // Set default cookie expiration and path.
 103 session_set_cookie_params($cookie['lifetime'], $cookiedir, $_SERVER['SERVER_NAME']);
 104 // Set session parameters on server side.
 105 // Use cookies to store session.
 106 ini_set('session.use_cookies', 1);
 107 // Force cookies for session (phpsessionID forbidden in URL).
 108 ini_set('session.use_only_cookies', 1);
 109 // Prevent PHP form using sessionID in URL if cookies are disabled.
 110 ini_set('session.use_trans_sid', false);
 111
 112 session_name('shaarli');
 113 // Start session if needed (Some server auto-start sessions).
 114 if (session_status() == PHP_SESSION_NONE) {
 115     session_start();
 116 }
 117
 118 // Regenerate session ID if invalid or not defined in cookie.
 119 if (isset($_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 $loginManager = new LoginManager($GLOBALS, $conf, $sessionManager);
 127 $loginManager->generateStaySignedInToken($_SERVER['REMOTE_ADDR']);
 128 $clientIpId = client_ip_id($_SERVER);
 129
 130 // LC_MESSAGES isn't defined without php-intl, in this case use LC_COLLATE locale instead.
 131 if (! defined('LC_MESSAGES')) {
 132     define('LC_MESSAGES', LC_COLLATE);
 133 }
 134
 135 // Sniff browser language and set date format accordingly.
 136 if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
 137     autoLocale($_SERVER['HTTP_ACCEPT_LANGUAGE']);
 138 }
 139
 140 new Languages(setlocale(LC_MESSAGES, 0), $conf);
 141
 142 $conf->setEmpty('general.timezone', date_default_timezone_get());
 143 $conf->setEmpty('general.title', t('Shared links on '). escape(index_url($_SERVER)));
 144 RainTPL::$tpl_dir = $conf->get('resource.raintpl_tpl').'/'.$conf->get('resource.theme').'/'; // template directory
 145 RainTPL::$cache_dir = $conf->get('resource.raintpl_tmp'); // cache directory
 146
 147 $pluginManager = new PluginManager($conf);
 148 $pluginManager->load($conf->get('general.enabled_plugins'));
 149
 150 date_default_timezone_set($conf->get('general.timezone', 'UTC'));
 151
 152 ob_start();  // Output buffering for the page cache.
 153
 154 // Prevent caching on client side or proxy: (yes, it's ugly)
 155 header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
 156 header("Cache-Control: no-store, no-cache, must-revalidate");
 157 header("Cache-Control: post-check=0, pre-check=0", false);
 158 header("Pragma: no-cache");
 159
 160 if (! is_file($conf->getConfigFileExt())) {
 161     // Ensure Shaarli has proper access to its resources
 162     $errors = ApplicationUtils::checkResourcePermissions($conf);
 163
 164     if ($errors != array()) {
 165         $message = '<p>'. t('Insufficient permissions:') .'</p><ul>';
 166
 167         foreach ($errors as $error) {
 168             $message .= '<li>'.$error.'</li>';
 169         }
 170         $message .= '</ul>';
 171
 172         header('Content-Type: text/html; charset=utf-8');
 173         echo $message;
 174         exit;
 175     }
 176
 177     // Display the installation form if no existing config is found
 178     install($conf, $sessionManager, $loginManager);
 179 }
 180
 181 $loginManager->checkLoginState($_COOKIE, $clientIpId);
 182
 183 /**
 184  * Adapter function to ensure compatibility with third-party templates
 185  *
 186  * @see https://github.com/shaarli/Shaarli/pull/1086
 187  *
 188  * @return bool true when the user is logged in, false otherwise
 189  */
 190 function isLoggedIn()
 191 {
 192     global $loginManager;
 193     return $loginManager->isLoggedIn();
 194 }
 195
 196
 197 // ------------------------------------------------------------------------------------------
 198 // Process login form: Check if login/password is correct.
 199 if (isset($_POST['login'])) {
 200     if (! $loginManager->canLogin($_SERVER)) {
 201         die(t('I said: NO. You are banned for the moment. Go away.'));
 202     }
 203     if (isset($_POST['password'])
 204         && $sessionManager->checkToken($_POST['token'])
 205         && $loginManager->checkCredentials($_SERVER['REMOTE_ADDR'], $clientIpId, $_POST['login'], $_POST['password'])
 206     ) {
 207         $loginManager->handleSuccessfulLogin($_SERVER);
 208
 209         $cookiedir = '';
 210         if (dirname($_SERVER['SCRIPT_NAME']) != '/') {
 211             // Note: Never forget the trailing slash on the cookie path!
 212             $cookiedir = dirname($_SERVER["SCRIPT_NAME"]) . '/';
 213         }
 214
 215         if (!empty($_POST['longlastingsession'])) {
 216             // Keep the session cookie even after the browser closes
 217             $sessionManager->setStaySignedIn(true);
 218             $expirationTime = $sessionManager->extendSession();
 219
 220             setcookie(
 221                 $loginManager::$STAY_SIGNED_IN_COOKIE,
 222                 $loginManager->getStaySignedInToken(),
 223                 $expirationTime,
 224                 WEB_PATH
 225             );
 226         } 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         $conf->get('redirector.url'),
 315         $conf->get('redirector.encode_url')
 316     );
 317
 318     /* Some Shaarlies may have very few links, so we need to look
 319        back in time until we have enough days ($nb_of_days).
 320     */
 321     $nb_of_days = 7; // We take 7 days.
 322     $today = date('Ymd');
 323     $days = array();
 324
 325     foreach ($LINKSDB as $link) {
 326         $day = $link['created']->format('Ymd'); // Extract day (without time)
 327         if (strcmp($day, $today) < 0) {
 328             if (empty($days[$day])) {
 329                 $days[$day] = array();
 330             }
 331             $days[$day][] = $link;
 332         }
 333
 334         if (count($days) > $nb_of_days) {
 335             break; // Have we collected enough days?
 336         }
 337     }
 338
 339     // Build the RSS feed.
 340     header('Content-Type: application/rss+xml; charset=utf-8');
 341     $pageaddr = escape(index_url($_SERVER));
 342     echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0">';
 343     echo '<channel>';
 344     echo '<title>Daily - '. $conf->get('general.title') . '</title>';
 345     echo '<link>'. $pageaddr .'</link>';
 346     echo '<description>Daily shared links</description>';
 347     echo '<language>en-en</language>';
 348     echo '<copyright>'. $pageaddr .'</copyright>'. PHP_EOL;
 349
 350     // For each day.
 351     foreach ($days as $day => $links) {
 352         $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 353         $absurl = escape(index_url($_SERVER).'?do=daily&day='.$day);  // Absolute URL of the corresponding "Daily" page.
 354
 355         // We pre-format some fields for proper output.
 356         foreach ($links as &$link) {
 357             $link['formatedDescription'] = format_description(
 358                 $link['description'],
 359                 $conf->get('redirector.url'),
 360                 $conf->get('redirector.encode_url')
 361             );
 362             $link['timestamp'] = $link['created']->getTimestamp();
 363             if (startsWith($link['url'], '?')) {
 364                 $link['url'] = index_url($_SERVER) . $link['url'];  // make permalink URL absolute
 365             }
 366         }
 367
 368         // Then build the HTML for this day:
 369         $tpl = new RainTPL;
 370         $tpl->assign('title', $conf->get('general.title'));
 371         $tpl->assign('daydate', $dayDate->getTimestamp());
 372         $tpl->assign('absurl', $absurl);
 373         $tpl->assign('links', $links);
 374         $tpl->assign('rssdate', escape($dayDate->format(DateTime::RSS)));
 375         $tpl->assign('hide_timestamps', $conf->get('privacy.hide_timestamps', false));
 376         $tpl->assign('index_url', $pageaddr);
 377         $html = $tpl->draw('dailyrss', true);
 378
 379         echo $html . PHP_EOL;
 380     }
 381     echo '</channel></rss><!-- Cached version of '. escape(page_url($_SERVER)) .' -->';
 382
 383     $cache->cache(ob_get_contents());
 384     ob_end_flush();
 385     exit;
 386 }
 387
 388 /**
 389  * Show the 'Daily' page.
 390  *
 391  * @param PageBuilder   $pageBuilder   Template engine wrapper.
 392  * @param LinkDB        $LINKSDB       LinkDB instance.
 393  * @param ConfigManager $conf          Configuration Manager instance.
 394  * @param PluginManager $pluginManager Plugin Manager instance.
 395  * @param LoginManager  $loginManager  Login Manager instance
 396  */
 397 function showDaily($pageBuilder, $LINKSDB, $conf, $pluginManager, $loginManager)
 398 {
 399     $day = date('Ymd', strtotime('-1 day')); // Yesterday, in format YYYYMMDD.
 400     if (isset($_GET['day'])) {
 401         $day = $_GET['day'];
 402     }
 403
 404     $days = $LINKSDB->days();
 405     $i = array_search($day, $days);
 406     if ($i === false && count($days)) {
 407         // no links for day, but at least one day with links
 408         $i = count($days) - 1;
 409         $day = $days[$i];
 410     }
 411     $previousday = '';
 412     $nextday = '';
 413
 414     if ($i !== false) {
 415         if ($i >= 1) {
 416              $previousday=$days[$i - 1];
 417         }
 418         if ($i < count($days) - 1) {
 419             $nextday = $days[$i + 1];
 420         }
 421     }
 422     try {
 423         $linksToDisplay = $LINKSDB->filterDay($day);
 424     } catch (Exception $exc) {
 425         error_log($exc);
 426         $linksToDisplay = array();
 427     }
 428
 429     // We pre-format some fields for proper output.
 430     foreach ($linksToDisplay as $key => $link) {
 431         $taglist = explode(' ', $link['tags']);
 432         uasort($taglist, 'strcasecmp');
 433         $linksToDisplay[$key]['taglist']=$taglist;
 434         $linksToDisplay[$key]['formatedDescription'] = format_description(
 435             $link['description'],
 436             $conf->get('redirector.url'),
 437             $conf->get('redirector.encode_url')
 438         );
 439         $linksToDisplay[$key]['timestamp'] =  $link['created']->getTimestamp();
 440     }
 441
 442     $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 443     $data = array(
 444         'pagetitle' => $conf->get('general.title') .' - '. format_date($dayDate, false),
 445         'linksToDisplay' => $linksToDisplay,
 446         'day' => $dayDate->getTimestamp(),
 447         'dayDate' => $dayDate,
 448         'previousday' => $previousday,
 449         'nextday' => $nextday,
 450     );
 451
 452     /* Hook is called before column construction so that plugins don't have
 453        to deal with columns. */
 454     $pluginManager->executeHooks('render_daily', $data, array('loggedin' => $loginManager->isLoggedIn()));
 455
 456     /* We need to spread the articles on 3 columns.
 457        I did not want to use a JavaScript lib like http://masonry.desandro.com/
 458        so I manually spread entries with a simple method: I roughly evaluate the
 459        height of a div according to title and description length.
 460     */
 461     $columns = array(array(), array(), array()); // Entries to display, for each column.
 462     $fill = array(0, 0, 0);  // Rough estimate of columns fill.
 463     foreach ($data['linksToDisplay'] as $key => $link) {
 464         // Roughly estimate length of entry (by counting characters)
 465         // Title: 30 chars = 1 line. 1 line is 30 pixels height.
 466         // Description: 836 characters gives roughly 342 pixel height.
 467         // This is not perfect, but it's usually OK.
 468         $length = strlen($link['title']) + (342 * strlen($link['description'])) / 836;
 469         if ($link['thumbnail']) {
 470             $length += 100; // 1 thumbnails roughly takes 100 pixels height.
 471         }
 472         // Then put in column which is the less filled:
 473         $smallest = min($fill); // find smallest value in array.
 474         $index = array_search($smallest, $fill); // find index of this smallest value.
 475         array_push($columns[$index], $link); // Put entry in this column.
 476         $fill[$index] += $length;
 477     }
 478
 479     $data['cols'] = $columns;
 480
 481     foreach ($data as $key => $value) {
 482         $pageBuilder->assign($key, $value);
 483     }
 484
 485     $pageBuilder->assign('pagetitle', t('Daily') .' - '. $conf->get('general.title', 'Shaarli'));
 486     $pageBuilder->renderPage('daily');
 487     exit;
 488 }
 489
 490 /**
 491  * Renders the linklist
 492  *
 493  * @param pageBuilder   $PAGE    pageBuilder instance.
 494  * @param LinkDB        $LINKSDB LinkDB instance.
 495  * @param ConfigManager $conf    Configuration Manager instance.
 496  * @param PluginManager $pluginManager Plugin Manager instance.
 497  */
 498 function showLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager)
 499 {
 500     buildLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
 501     $PAGE->renderPage('linklist');
 502 }
 503
 504 /**
 505  * Render HTML page (according to URL parameters and user rights)
 506  *
 507  * @param ConfigManager  $conf           Configuration Manager instance.
 508  * @param PluginManager  $pluginManager  Plugin Manager instance,
 509  * @param LinkDB         $LINKSDB
 510  * @param History        $history        instance
 511  * @param SessionManager $sessionManager SessionManager instance
 512  * @param LoginManager   $loginManager   LoginManager instance
 513  */
 514 function renderPage($conf, $pluginManager, $LINKSDB, $history, $sessionManager, $loginManager)
 515 {
 516     $updater = new Updater(
 517         read_updates_file($conf->get('resource.updates')),
 518         $LINKSDB,
 519         $conf,
 520         $loginManager->isLoggedIn(),
 521         $_SESSION
 522     );
 523     try {
 524         $newUpdates = $updater->update();
 525         if (! empty($newUpdates)) {
 526             write_updates_file(
 527                 $conf->get('resource.updates'),
 528                 $updater->getDoneUpdates()
 529             );
 530         }
 531     } catch (Exception $e) {
 532         die($e->getMessage());
 533     }
 534
 535     $PAGE = new PageBuilder($conf, $_SESSION, $LINKSDB, $sessionManager->generateToken(), $loginManager->isLoggedIn());
 536     $PAGE->assign('linkcount', count($LINKSDB));
 537     $PAGE->assign('privateLinkcount', count_private($LINKSDB));
 538     $PAGE->assign('plugin_errors', $pluginManager->getErrors());
 539
 540     // Determine which page will be rendered.
 541     $query = (isset($_SERVER['QUERY_STRING'])) ? $_SERVER['QUERY_STRING'] : '';
 542     $targetPage = Router::findPage($query, $_GET, $loginManager->isLoggedIn());
 543
 544     if (// if the user isn't logged in
 545         !$loginManager->isLoggedIn() &&
 546         // and Shaarli doesn't have public content...
 547         $conf->get('privacy.hide_public_links') &&
 548         // and is configured to enforce the login
 549         $conf->get('privacy.force_login') &&
 550         // and the current page isn't already the login page
 551         $targetPage !== Router::$PAGE_LOGIN &&
 552         // and the user is not requesting a feed (which would lead to a different content-type as expected)
 553         $targetPage !== Router::$PAGE_FEED_ATOM &&
 554         $targetPage !== Router::$PAGE_FEED_RSS
 555     ) {
 556         // force current page to be the login page
 557         $targetPage = Router::$PAGE_LOGIN;
 558     }
 559
 560     // Call plugin hooks for header, footer and includes, specifying which page will be rendered.
 561     // Then assign generated data to RainTPL.
 562     $common_hooks = array(
 563         'includes',
 564         'header',
 565         'footer',
 566     );
 567
 568     foreach ($common_hooks as $name) {
 569         $plugin_data = array();
 570         $pluginManager->executeHooks(
 571             'render_' . $name,
 572             $plugin_data,
 573             array(
 574                 'target' => $targetPage,
 575                 'loggedin' => $loginManager->isLoggedIn()
 576             )
 577         );
 578         $PAGE->assign('plugins_' . $name, $plugin_data);
 579     }
 580
 581     // -------- Display login form.
 582     if ($targetPage == Router::$PAGE_LOGIN) {
 583         if ($conf->get('security.open_shaarli')) {
 584             header('Location: ?');
 585             exit;
 586         }  // No need to login for open Shaarli
 587         if (isset($_GET['username'])) {
 588             $PAGE->assign('username', escape($_GET['username']));
 589         }
 590         $PAGE->assign('returnurl', (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']):''));
 591         // add default state of the 'remember me' checkbox
 592         $PAGE->assign('remember_user_default', $conf->get('privacy.remember_user_default'));
 593         $PAGE->assign('user_can_login', $loginManager->canLogin($_SERVER));
 594         $PAGE->assign('pagetitle', t('Login') .' - '. $conf->get('general.title', 'Shaarli'));
 595         $PAGE->renderPage('loginform');
 596         exit;
 597     }
 598     // -------- User wants to logout.
 599     if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=logout')) {
 600         invalidateCaches($conf->get('resource.page_cache'));
 601         $sessionManager->logout();
 602         setcookie(LoginManager::$STAY_SIGNED_IN_COOKIE, 'false', 0, WEB_PATH);
 603         header('Location: ?');
 604         exit;
 605     }
 606
 607     // -------- Picture wall
 608     if ($targetPage == Router::$PAGE_PICWALL) {
 609         $PAGE->assign('pagetitle', t('Picture wall') .' - '. $conf->get('general.title', 'Shaarli'));
 610         if (! $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE) === Thumbnailer::MODE_NONE) {
 611             $PAGE->assign('linksToDisplay', []);
 612             $PAGE->renderPage('picwall');
 613             exit;
 614         }
 615
 616         // Optionally filter the results:
 617         $links = $LINKSDB->filterSearch($_GET);
 618         $linksToDisplay = array();
 619
 620         // Get only links which have a thumbnail.
 621         // Note: we do not retrieve thumbnails here, the request is too heavy.
 622         foreach ($links as $key => $link) {
 623             if (isset($link['thumbnail']) && $link['thumbnail'] !== false) {
 624                 $linksToDisplay[] = $link; // Add to array.
 625             }
 626         }
 627
 628         $data = array(
 629             'linksToDisplay' => $linksToDisplay,
 630         );
 631         $pluginManager->executeHooks('render_picwall', $data, array('loggedin' => $loginManager->isLoggedIn()));
 632
 633         foreach ($data as $key => $value) {
 634             $PAGE->assign($key, $value);
 635         }
 636
 637
 638         $PAGE->renderPage('picwall');
 639         exit;
 640     }
 641
 642     // -------- Tag cloud
 643     if ($targetPage == Router::$PAGE_TAGCLOUD) {
 644         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
 645         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 646         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 647
 648         // We sort tags alphabetically, then choose a font size according to count.
 649         // First, find max value.
 650         $maxcount = 0;
 651         foreach ($tags as $value) {
 652             $maxcount = max($maxcount, $value);
 653         }
 654
 655         alphabetical_sort($tags, false, true);
 656
 657         $tagList = array();
 658         foreach ($tags as $key => $value) {
 659             if (in_array($key, $filteringTags)) {
 660                 continue;
 661             }
 662             // Tag font size scaling:
 663             //   default 15 and 30 logarithm bases affect scaling,
 664             //   22 and 6 are arbitrary font sizes for max and min sizes.
 665             $size = log($value, 15) / log($maxcount, 30) * 2.2 + 0.8;
 666             $tagList[$key] = array(
 667                 'count' => $value,
 668                 'size' => number_format($size, 2, '.', ''),
 669             );
 670         }
 671
 672         $searchTags = implode(' ', escape($filteringTags));
 673         $data = array(
 674             'search_tags' => $searchTags,
 675             'tags' => $tagList,
 676         );
 677         $pluginManager->executeHooks('render_tagcloud', $data, array('loggedin' => $loginManager->isLoggedIn()));
 678
 679         foreach ($data as $key => $value) {
 680             $PAGE->assign($key, $value);
 681         }
 682
 683         $searchTags = ! empty($searchTags) ? $searchTags .' - ' : '';
 684         $PAGE->assign('pagetitle', $searchTags. t('Tag cloud') .' - '. $conf->get('general.title', 'Shaarli'));
 685         $PAGE->renderPage('tag.cloud');
 686         exit;
 687     }
 688
 689     // -------- Tag list
 690     if ($targetPage == Router::$PAGE_TAGLIST) {
 691         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
 692         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 693         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 694         foreach ($filteringTags as $tag) {
 695             if (array_key_exists($tag, $tags)) {
 696                 unset($tags[$tag]);
 697             }
 698         }
 699
 700         if (! empty($_GET['sort']) && $_GET['sort'] === 'alpha') {
 701             alphabetical_sort($tags, false, true);
 702         }
 703
 704         $searchTags = implode(' ', escape($filteringTags));
 705         $data = [
 706             'search_tags' => $searchTags,
 707             'tags' => $tags,
 708         ];
 709         $pluginManager->executeHooks('render_taglist', $data, ['loggedin' => $loginManager->isLoggedIn()]);
 710
 711         foreach ($data as $key => $value) {
 712             $PAGE->assign($key, $value);
 713         }
 714
 715         $searchTags = ! empty($searchTags) ? $searchTags .' - ' : '';
 716         $PAGE->assign('pagetitle', $searchTags . t('Tag list') .' - '. $conf->get('general.title', 'Shaarli'));
 717         $PAGE->renderPage('tag.list');
 718         exit;
 719     }
 720
 721     // Daily page.
 722     if ($targetPage == Router::$PAGE_DAILY) {
 723         showDaily($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
 724     }
 725
 726     // ATOM and RSS feed.
 727     if ($targetPage == Router::$PAGE_FEED_ATOM || $targetPage == Router::$PAGE_FEED_RSS) {
 728         $feedType = $targetPage == Router::$PAGE_FEED_RSS ? FeedBuilder::$FEED_RSS : FeedBuilder::$FEED_ATOM;
 729         header('Content-Type: application/'. $feedType .'+xml; charset=utf-8');
 730
 731         // Cache system
 732         $query = $_SERVER['QUERY_STRING'];
 733         $cache = new CachedPage(
 734             $conf->get('resource.page_cache'),
 735             page_url($_SERVER),
 736             startsWith($query, 'do='. $targetPage) && !$loginManager->isLoggedIn()
 737         );
 738         $cached = $cache->cachedVersion();
 739         if (!empty($cached)) {
 740             echo $cached;
 741             exit;
 742         }
 743
 744         // Generate data.
 745         $feedGenerator = new FeedBuilder($LINKSDB, $feedType, $_SERVER, $_GET, $loginManager->isLoggedIn());
 746         $feedGenerator->setLocale(strtolower(setlocale(LC_COLLATE, 0)));
 747         $feedGenerator->setHideDates($conf->get('privacy.hide_timestamps') && !$loginManager->isLoggedIn());
 748         $feedGenerator->setUsePermalinks(isset($_GET['permalinks']) || !$conf->get('feed.rss_permalinks'));
 749         $data = $feedGenerator->buildData();
 750
 751         // Process plugin hook.
 752         $pluginManager->executeHooks('render_feed', $data, array(
 753             'loggedin' => $loginManager->isLoggedIn(),
 754             'target' => $targetPage,
 755         ));
 756
 757         // Render the template.
 758         $PAGE->assignAll($data);
 759         $PAGE->renderPage('feed.'. $feedType);
 760         $cache->cache(ob_get_contents());
 761         ob_end_flush();
 762         exit;
 763     }
 764
 765     // Display opensearch plugin (XML)
 766     if ($targetPage == Router::$PAGE_OPENSEARCH) {
 767         header('Content-Type: application/xml; charset=utf-8');
 768         $PAGE->assign('serverurl', index_url($_SERVER));
 769         $PAGE->renderPage('opensearch');
 770         exit;
 771     }
 772
 773     // -------- User clicks on a tag in a link: The tag is added to the list of searched tags (searchtags=...)
 774     if (isset($_GET['addtag'])) {
 775         // Get previous URL (http_referer) and add the tag to the searchtags parameters in query.
 776         if (empty($_SERVER['HTTP_REFERER'])) {
 777             // In case browser does not send HTTP_REFERER
 778             header('Location: ?searchtags='.urlencode($_GET['addtag']));
 779             exit;
 780         }
 781         parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $params);
 782
 783         // Prevent redirection loop
 784         if (isset($params['addtag'])) {
 785             unset($params['addtag']);
 786         }
 787
 788         // Check if this tag is already in the search query and ignore it if it is.
 789         // Each tag is always separated by a space
 790         if (isset($params['searchtags'])) {
 791             $current_tags = explode(' ', $params['searchtags']);
 792         } else {
 793             $current_tags = array();
 794         }
 795         $addtag = true;
 796         foreach ($current_tags as $value) {
 797             if ($value === $_GET['addtag']) {
 798                 $addtag = false;
 799                 break;
 800             }
 801         }
 802         // Append the tag if necessary
 803         if (empty($params['searchtags'])) {
 804             $params['searchtags'] = trim($_GET['addtag']);
 805         } elseif ($addtag) {
 806             $params['searchtags'] = trim($params['searchtags']).' '.trim($_GET['addtag']);
 807         }
 808
 809         // We also remove page (keeping the same page has no sense, since the
 810         // results are different)
 811         unset($params['page']);
 812
 813         header('Location: ?'.http_build_query($params));
 814         exit;
 815     }
 816
 817     // -------- User clicks on a tag in result count: Remove the tag from the list of searched tags (searchtags=...)
 818     if (isset($_GET['removetag'])) {
 819         // Get previous URL (http_referer) and remove the tag from the searchtags parameters in query.
 820         if (empty($_SERVER['HTTP_REFERER'])) {
 821             header('Location: ?');
 822             exit;
 823         }
 824
 825         // In case browser does not send HTTP_REFERER
 826         parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $params);
 827
 828         // Prevent redirection loop
 829         if (isset($params['removetag'])) {
 830             unset($params['removetag']);
 831         }
 832
 833         if (isset($params['searchtags'])) {
 834             $tags = explode(' ', $params['searchtags']);
 835             // Remove value from array $tags.
 836             $tags = array_diff($tags, array($_GET['removetag']));
 837             $params['searchtags'] = implode(' ', $tags);
 838
 839             if (empty($params['searchtags'])) {
 840                 unset($params['searchtags']);
 841             }
 842
 843             // We also remove page (keeping the same page has no sense, since
 844             // the results are different)
 845             unset($params['page']);
 846         }
 847         header('Location: ?'.http_build_query($params));
 848         exit;
 849     }
 850
 851     // -------- User wants to change the number of links per page (linksperpage=...)
 852     if (isset($_GET['linksperpage'])) {
 853         if (is_numeric($_GET['linksperpage'])) {
 854             $_SESSION['LINKS_PER_PAGE']=abs(intval($_GET['linksperpage']));
 855         }
 856
 857         if (! empty($_SERVER['HTTP_REFERER'])) {
 858             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('linksperpage'));
 859         } else {
 860             $location = '?';
 861         }
 862         header('Location: '. $location);
 863         exit;
 864     }
 865
 866     // -------- User wants to see only private links (toggle)
 867     if (isset($_GET['visibility'])) {
 868         if ($_GET['visibility'] === 'private') {
 869             // Visibility not set or not already private, set private, otherwise reset it
 870             if (empty($_SESSION['visibility']) || $_SESSION['visibility'] !== 'private') {
 871                 // See only private links
 872                 $_SESSION['visibility'] = 'private';
 873             } else {
 874                 unset($_SESSION['visibility']);
 875             }
 876         } elseif ($_GET['visibility'] === 'public') {
 877             if (empty($_SESSION['visibility']) || $_SESSION['visibility'] !== 'public') {
 878                 // See only public links
 879                 $_SESSION['visibility'] = 'public';
 880             } else {
 881                 unset($_SESSION['visibility']);
 882             }
 883         }
 884
 885         if (! empty($_SERVER['HTTP_REFERER'])) {
 886             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('visibility'));
 887         } else {
 888             $location = '?';
 889         }
 890         header('Location: '. $location);
 891         exit;
 892     }
 893
 894     // -------- User wants to see only untagged links (toggle)
 895     if (isset($_GET['untaggedonly'])) {
 896         $_SESSION['untaggedonly'] = empty($_SESSION['untaggedonly']);
 897
 898         if (! empty($_SERVER['HTTP_REFERER'])) {
 899             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('untaggedonly'));
 900         } else {
 901             $location = '?';
 902         }
 903         header('Location: '. $location);
 904         exit;
 905     }
 906
 907     // -------- Handle other actions allowed for non-logged in users:
 908     if (!$loginManager->isLoggedIn()) {
 909         // User tries to post new link but is not logged in:
 910         // Show login screen, then redirect to ?post=...
 911         if (isset($_GET['post'])) {
 912             header( // Redirect to login page, then back to post link.
 913                 'Location: ?do=login&post='.urlencode($_GET['post']).
 914                 (!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').
 915                 (!empty($_GET['description'])?'&description='.urlencode($_GET['description']):'').
 916                 (!empty($_GET['tags'])?'&tags='.urlencode($_GET['tags']):'').
 917                 (!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')
 918             );
 919             exit;
 920         }
 921
 922         showLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
 923         if (isset($_GET['edit_link'])) {
 924             header('Location: ?do=login&edit_link='. escape($_GET['edit_link']));
 925             exit;
 926         }
 927
 928         exit; // Never remove this one! All operations below are reserved for logged in user.
 929     }
 930
 931     // -------- All other functions are reserved for the registered user:
 932
 933     // -------- Display the Tools menu if requested (import/export/bookmarklet...)
 934     if ($targetPage == Router::$PAGE_TOOLS) {
 935         $data = [
 936             'pageabsaddr' => index_url($_SERVER),
 937             'sslenabled' => is_https($_SERVER),
 938         ];
 939         $pluginManager->executeHooks('render_tools', $data);
 940
 941         foreach ($data as $key => $value) {
 942             $PAGE->assign($key, $value);
 943         }
 944
 945         $PAGE->assign('pagetitle', t('Tools') .' - '. $conf->get('general.title', 'Shaarli'));
 946         $PAGE->renderPage('tools');
 947         exit;
 948     }
 949
 950     // -------- User wants to change his/her password.
 951     if ($targetPage == Router::$PAGE_CHANGEPASSWORD) {
 952         if ($conf->get('security.open_shaarli')) {
 953             die(t('You are not supposed to change a password on an Open Shaarli.'));
 954         }
 955
 956         if (!empty($_POST['setpassword']) && !empty($_POST['oldpassword'])) {
 957             if (!$sessionManager->checkToken($_POST['token'])) {
 958                 die(t('Wrong token.')); // Go away!
 959             }
 960
 961             // Make sure old password is correct.
 962             $oldhash = sha1(
 963                 $_POST['oldpassword'].$conf->get('credentials.login').$conf->get('credentials.salt')
 964             );
 965             if ($oldhash != $conf->get('credentials.hash')) {
 966                 echo '<script>alert("'
 967                     . t('The old password is not correct.')
 968                     .'");document.location=\'?do=changepasswd\';</script>';
 969                 exit;
 970             }
 971             // Save new password
 972             // Salt renders rainbow-tables attacks useless.
 973             $conf->set('credentials.salt', sha1(uniqid('', true) .'_'. mt_rand()));
 974             $conf->set(
 975                 'credentials.hash',
 976                 sha1(
 977                     $_POST['setpassword']
 978                     . $conf->get('credentials.login')
 979                     . $conf->get('credentials.salt')
 980                 )
 981             );
 982             try {
 983                 $conf->write($loginManager->isLoggedIn());
 984             } catch (Exception $e) {
 985                 error_log(
 986                     'ERROR while writing config file after changing password.' . PHP_EOL .
 987                     $e->getMessage()
 988                 );
 989
 990                 // TODO: do not handle exceptions/errors in JS.
 991                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=tools\';</script>';
 992                 exit;
 993             }
 994             echo '<script>alert("'. t('Your password has been changed') .'");document.location=\'?do=tools\';</script>';
 995             exit;
 996         } else {
 997             // show the change password form.
 998             $PAGE->assign('pagetitle', t('Change password') .' - '. $conf->get('general.title', 'Shaarli'));
 999             $PAGE->renderPage('changepassword');
1000             exit;
1001         }
1002     }
1003
1004     // -------- User wants to change configuration
1005     if ($targetPage == Router::$PAGE_CONFIGURE) {
1006         if (!empty($_POST['title'])) {
1007             if (!$sessionManager->checkToken($_POST['token'])) {
1008                 die(t('Wrong token.')); // Go away!
1009             }
1010             $tz = 'UTC';
1011             if (!empty($_POST['continent']) && !empty($_POST['city'])
1012                 && isTimeZoneValid($_POST['continent'], $_POST['city'])
1013             ) {
1014                 $tz = $_POST['continent'] . '/' . $_POST['city'];
1015             }
1016             $conf->set('general.timezone', $tz);
1017             $conf->set('general.title', escape($_POST['title']));
1018             $conf->set('general.header_link', escape($_POST['titleLink']));
1019             $conf->set('resource.theme', escape($_POST['theme']));
1020             $conf->set('security.session_protection_disabled', !empty($_POST['disablesessionprotection']));
1021             $conf->set('privacy.default_private_links', !empty($_POST['privateLinkByDefault']));
1022             $conf->set('feed.rss_permalinks', !empty($_POST['enableRssPermalinks']));
1023             $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1024             $conf->set('privacy.hide_public_links', !empty($_POST['hidePublicLinks']));
1025             $conf->set('api.enabled', !empty($_POST['enableApi']));
1026             $conf->set('api.secret', escape($_POST['apiSecret']));
1027             $conf->set('translation.language', escape($_POST['language']));
1028
1029             $thumbnailsMode = extension_loaded('gd') ? $_POST['enableThumbnails'] : Thumbnailer::MODE_NONE;
1030             if ($thumbnailsMode !== Thumbnailer::MODE_NONE
1031                 && $thumbnailsMode !== $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE)
1032             ) {
1033                 $_SESSION['warnings'][] = t(
1034                     'You have enabled or changed thumbnails mode. '
1035                     .'<a href="?do=thumbs_update">Please synchronize them</a>.'
1036                 );
1037             }
1038             $conf->set('thumbnails.mode', $thumbnailsMode);
1039
1040             try {
1041                 $conf->write($loginManager->isLoggedIn());
1042                 $history->updateSettings();
1043                 invalidateCaches($conf->get('resource.page_cache'));
1044             } catch (Exception $e) {
1045                 error_log(
1046                     'ERROR while writing config file after configuration update.' . PHP_EOL .
1047                     $e->getMessage()
1048                 );
1049
1050                 // TODO: do not handle exceptions/errors in JS.
1051                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=configure\';</script>';
1052                 exit;
1053             }
1054             echo '<script>alert("'. t('Configuration was saved.') .'");document.location=\'?do=configure\';</script>';
1055             exit;
1056         } else {
1057             // Show the configuration form.
1058             $PAGE->assign('title', $conf->get('general.title'));
1059             $PAGE->assign('theme', $conf->get('resource.theme'));
1060             $PAGE->assign('theme_available', ThemeUtils::getThemes($conf->get('resource.raintpl_tpl')));
1061             list($continents, $cities) = generateTimeZoneData(
1062                 timezone_identifiers_list(),
1063                 $conf->get('general.timezone')
1064             );
1065             $PAGE->assign('continents', $continents);
1066             $PAGE->assign('cities', $cities);
1067             $PAGE->assign('private_links_default', $conf->get('privacy.default_private_links', false));
1068             $PAGE->assign('session_protection_disabled', $conf->get('security.session_protection_disabled', false));
1069             $PAGE->assign('enable_rss_permalinks', $conf->get('feed.rss_permalinks', false));
1070             $PAGE->assign('enable_update_check', $conf->get('updates.check_updates', true));
1071             $PAGE->assign('hide_public_links', $conf->get('privacy.hide_public_links', false));
1072             $PAGE->assign('api_enabled', $conf->get('api.enabled', true));
1073             $PAGE->assign('api_secret', $conf->get('api.secret'));
1074             $PAGE->assign('languages', Languages::getAvailableLanguages());
1075             $PAGE->assign('language', $conf->get('translation.language'));
1076             $PAGE->assign('gd_enabled', extension_loaded('gd'));
1077             $PAGE->assign('thumbnails_mode', $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE));
1078             $PAGE->assign('pagetitle', t('Configure') .' - '. $conf->get('general.title', 'Shaarli'));
1079             $PAGE->renderPage('configure');
1080             exit;
1081         }
1082     }
1083
1084     // -------- User wants to rename a tag or delete it
1085     if ($targetPage == Router::$PAGE_CHANGETAG) {
1086         if (empty($_POST['fromtag']) || (empty($_POST['totag']) && isset($_POST['renametag']))) {
1087             $PAGE->assign('fromtag', ! empty($_GET['fromtag']) ? escape($_GET['fromtag']) : '');
1088             $PAGE->assign('pagetitle', t('Manage tags') .' - '. $conf->get('general.title', 'Shaarli'));
1089             $PAGE->renderPage('changetag');
1090             exit;
1091         }
1092
1093         if (!$sessionManager->checkToken($_POST['token'])) {
1094             die(t('Wrong token.'));
1095         }
1096
1097         $toTag = isset($_POST['totag']) ? escape($_POST['totag']) : null;
1098         $alteredLinks = $LINKSDB->renameTag(escape($_POST['fromtag']), $toTag);
1099         $LINKSDB->save($conf->get('resource.page_cache'));
1100         foreach ($alteredLinks as $link) {
1101             $history->updateLink($link);
1102         }
1103         $delete = empty($_POST['totag']);
1104         $redirect = $delete ? 'do=changetag' : 'searchtags='. urlencode(escape($_POST['totag']));
1105         $count = count($alteredLinks);
1106         $alert = $delete
1107             ? sprintf(t('The tag was removed from %d link.', 'The tag was removed from %d links.', $count), $count)
1108             : sprintf(t('The tag was renamed in %d link.', 'The tag was renamed in %d links.', $count), $count);
1109         echo '<script>alert("'. $alert .'");document.location=\'?'. $redirect .'\';</script>';
1110         exit;
1111     }
1112
1113     // -------- User wants to add a link without using the bookmarklet: Show form.
1114     if ($targetPage == Router::$PAGE_ADDLINK) {
1115         $PAGE->assign('pagetitle', t('Shaare a new link') .' - '. $conf->get('general.title', 'Shaarli'));
1116         $PAGE->renderPage('addlink');
1117         exit;
1118     }
1119
1120     // -------- User clicked the "Save" button when editing a link: Save link to database.
1121     if (isset($_POST['save_edit'])) {
1122         // Go away!
1123         if (! $sessionManager->checkToken($_POST['token'])) {
1124             die(t('Wrong token.'));
1125         }
1126
1127         // lf_id should only be present if the link exists.
1128         $id = isset($_POST['lf_id']) ? intval(escape($_POST['lf_id'])) : $LINKSDB->getNextId();
1129         // Linkdate is kept here to:
1130         //   - use the same permalink for notes as they're displayed when creating them
1131         //   - let users hack creation date of their posts
1132         //     See: https://shaarli.readthedocs.io/en/master/guides/various-hacks/#changing-the-timestamp-for-a-shaare
1133         $linkdate = escape($_POST['lf_linkdate']);
1134         if (isset($LINKSDB[$id])) {
1135             // Edit
1136             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1137             $updated = new DateTime();
1138             $shortUrl = $LINKSDB[$id]['shorturl'];
1139             $new = false;
1140         } else {
1141             // New link
1142             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1143             $updated = null;
1144             $shortUrl = link_small_hash($created, $id);
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(
1161             'id' => $id,
1162             'title' => trim($_POST['lf_title']),
1163             'url' => $url,
1164             'description' => $_POST['lf_description'],
1165             'private' => (isset($_POST['lf_private']) ? 1 : 0),
1166             'created' => $created,
1167             'updated' => $updated,
1168             'tags' => str_replace(',', ' ', $tags),
1169             'shorturl' => $shortUrl,
1170         );
1171
1172         // If title is empty, use the URL as title.
1173         if ($link['title'] == '') {
1174             $link['title'] = $link['url'];
1175         }
1176
1177         if ($conf->get('thumbnails.mode', Thumbnailer::MODE_NONE) !== Thumbnailer::MODE_NONE) {
1178             $thumbnailer = new Thumbnailer($conf);
1179             $link['thumbnail'] = $thumbnailer->get($url);
1180         }
1181
1182         $pluginManager->executeHooks('save_link', $link);
1183
1184         $LINKSDB[$id] = $link;
1185         $LINKSDB->save($conf->get('resource.page_cache'));
1186         if ($new) {
1187             $history->addLink($link);
1188         } else {
1189             $history->updateLink($link);
1190         }
1191
1192         // If we are called from the bookmarklet, we must close the popup:
1193         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1194             echo '<script>self.close();</script>';
1195             exit;
1196         }
1197
1198         $returnurl = !empty($_POST['returnurl']) ? $_POST['returnurl'] : '?';
1199         $location = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1200         // Scroll to the link which has been edited.
1201         $location .= '#' . $link['shorturl'];
1202         // After saving the link, redirect to the page the user was on.
1203         header('Location: '. $location);
1204         exit;
1205     }
1206
1207     // -------- User clicked the "Cancel" button when editing a link.
1208     if (isset($_POST['cancel_edit'])) {
1209         $id = isset($_POST['lf_id']) ? (int) escape($_POST['lf_id']) : false;
1210         if (! isset($LINKSDB[$id])) {
1211             header('Location: ?');
1212         }
1213         // If we are called from the bookmarklet, we must close the popup:
1214         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1215             echo '<script>self.close();</script>';
1216             exit;
1217         }
1218         $link = $LINKSDB[$id];
1219         $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
1220         // Scroll to the link which has been edited.
1221         $returnurl .= '#'. $link['shorturl'];
1222         $returnurl = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1223         header('Location: '.$returnurl); // After canceling, redirect to the page the user was on.
1224         exit;
1225     }
1226
1227     // -------- User clicked the "Delete" button when editing a link: Delete link from database.
1228     if ($targetPage == Router::$PAGE_DELETELINK) {
1229         if (! $sessionManager->checkToken($_GET['token'])) {
1230             die(t('Wrong token.'));
1231         }
1232
1233         $ids = trim($_GET['lf_linkdate']);
1234         if (strpos($ids, ' ') !== false) {
1235             // multiple, space-separated ids provided
1236             $ids = array_values(array_filter(preg_split('/\s+/', escape($ids))));
1237         } else {
1238             // only a single id provided
1239             $ids = [$ids];
1240         }
1241         // assert at least one id is given
1242         if (!count($ids)) {
1243             die('no id provided');
1244         }
1245         foreach ($ids as $id) {
1246             $id = (int) escape($id);
1247             $link = $LINKSDB[$id];
1248             $pluginManager->executeHooks('delete_link', $link);
1249             $history->deleteLink($link);
1250             unset($LINKSDB[$id]);
1251         }
1252         $LINKSDB->save($conf->get('resource.page_cache')); // save to disk
1253
1254         // If we are called from the bookmarklet, we must close the popup:
1255         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1256             echo '<script>self.close();</script>';
1257             exit;
1258         }
1259
1260         $location = '?';
1261         if (isset($_SERVER['HTTP_REFERER'])) {
1262             // Don't redirect to where we were previously if it was a permalink or an edit_link, because it would 404.
1263             $location = generateLocation(
1264                 $_SERVER['HTTP_REFERER'],
1265                 $_SERVER['HTTP_HOST'],
1266                 ['delete_link', 'edit_link', $link['shorturl']]
1267             );
1268         }
1269
1270         header('Location: ' . $location); // After deleting the link, redirect to appropriate location
1271         exit;
1272     }
1273
1274     // -------- User clicked the "EDIT" button on a link: Display link edit form.
1275     if (isset($_GET['edit_link'])) {
1276         $id = (int) escape($_GET['edit_link']);
1277         $link = $LINKSDB[$id];  // Read database
1278         if (!$link) {
1279             header('Location: ?');
1280             exit;
1281         } // Link not found in database.
1282         $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1283         $data = array(
1284             'link' => $link,
1285             'link_is_new' => false,
1286             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1287             'tags' => $LINKSDB->linksCountPerTag(),
1288         );
1289         $pluginManager->executeHooks('render_editlink', $data);
1290
1291         foreach ($data as $key => $value) {
1292             $PAGE->assign($key, $value);
1293         }
1294
1295         $PAGE->assign('pagetitle', t('Edit') .' '. t('Shaare') .' - '. $conf->get('general.title', 'Shaarli'));
1296         $PAGE->renderPage('editlink');
1297         exit;
1298     }
1299
1300     // -------- User want to post a new link: Display link edit form.
1301     if (isset($_GET['post'])) {
1302         $url = cleanup_url($_GET['post']);
1303
1304         $link_is_new = false;
1305         // Check if URL is not already in database (in this case, we will edit the existing link)
1306         $link = $LINKSDB->getLinkFromUrl($url);
1307         if (! $link) {
1308             $link_is_new = true;
1309             $linkdate = strval(date(LinkDB::LINK_DATE_FORMAT));
1310             // Get title if it was provided in URL (by the bookmarklet).
1311             $title = empty($_GET['title']) ? '' : escape($_GET['title']);
1312             // Get description if it was provided in URL (by the bookmarklet). [Bronco added that]
1313             $description = empty($_GET['description']) ? '' : escape($_GET['description']);
1314             $tags = empty($_GET['tags']) ? '' : escape($_GET['tags']);
1315             $private = !empty($_GET['private']) && $_GET['private'] === "1" ? 1 : 0;
1316
1317             // If this is an HTTP(S) link, we try go get the page to extract
1318             // the title (otherwise we will to straight to the edit form.)
1319             if (empty($title) && strpos(get_url_scheme($url), 'http') !== false) {
1320                 // Short timeout to keep the application responsive
1321                 // The callback will fill $charset and $title with data from the downloaded page.
1322                 get_http_response(
1323                     $url,
1324                     $conf->get('general.download_timeout', 30),
1325                     $conf->get('general.download_max_size', 4194304),
1326                     get_curl_download_callback($charset, $title)
1327                 );
1328                 if (! empty($title) && strtolower($charset) != 'utf-8') {
1329                     $title = mb_convert_encoding($title, 'utf-8', $charset);
1330                 }
1331             }
1332
1333             if ($url == '') {
1334                 $url = '?' . smallHash($linkdate . $LINKSDB->getNextId());
1335                 $title = $conf->get('general.default_note_title', t('Note: '));
1336             }
1337             $url = escape($url);
1338             $title = escape($title);
1339
1340             $link = array(
1341                 'linkdate' => $linkdate,
1342                 'title' => $title,
1343                 'url' => $url,
1344                 'description' => $description,
1345                 'tags' => $tags,
1346                 'private' => $private,
1347             );
1348         } else {
1349             $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1350         }
1351
1352         $data = array(
1353             'link' => $link,
1354             'link_is_new' => $link_is_new,
1355             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1356             'source' => (isset($_GET['source']) ? $_GET['source'] : ''),
1357             'tags' => $LINKSDB->linksCountPerTag(),
1358             'default_private_links' => $conf->get('privacy.default_private_links', false),
1359         );
1360         $pluginManager->executeHooks('render_editlink', $data);
1361
1362         foreach ($data as $key => $value) {
1363             $PAGE->assign($key, $value);
1364         }
1365
1366         $PAGE->assign('pagetitle', t('Shaare') .' - '. $conf->get('general.title', 'Shaarli'));
1367         $PAGE->renderPage('editlink');
1368         exit;
1369     }
1370
1371     if ($targetPage == Router::$PAGE_PINLINK) {
1372         if (! isset($_GET['id']) || empty($LINKSDB[$_GET['id']])) {
1373             // FIXME! Use a proper error system.
1374             $msg = t('Invalid link ID provided');
1375             echo '<script>alert("'. $msg .'");document.location=\''. index_url($_SERVER) .'\';</script>';
1376             exit;
1377         }
1378         if (! $sessionManager->checkToken($_GET['token'])) {
1379             die('Wrong token.');
1380         }
1381
1382         $link = $LINKSDB[$_GET['id']];
1383         $link['sticky'] = ! $link['sticky'];
1384         $LINKSDB[(int) $_GET['id']] = $link;
1385         $LINKSDB->save($conf->get('resource.page_cache'));
1386         header('Location: '.index_url($_SERVER));
1387         exit;
1388     }
1389
1390     if ($targetPage == Router::$PAGE_EXPORT) {
1391         // Export links as a Netscape Bookmarks file
1392
1393         if (empty($_GET['selection'])) {
1394             $PAGE->assign('pagetitle', t('Export') .' - '. $conf->get('general.title', 'Shaarli'));
1395             $PAGE->renderPage('export');
1396             exit;
1397         }
1398
1399         // export as bookmarks_(all|private|public)_YYYYmmdd_HHMMSS.html
1400         $selection = $_GET['selection'];
1401         if (isset($_GET['prepend_note_url'])) {
1402             $prependNoteUrl = $_GET['prepend_note_url'];
1403         } else {
1404             $prependNoteUrl = false;
1405         }
1406
1407         try {
1408             $PAGE->assign(
1409                 'links',
1410                 NetscapeBookmarkUtils::filterAndFormat(
1411                     $LINKSDB,
1412                     $selection,
1413                     $prependNoteUrl,
1414                     index_url($_SERVER)
1415                 )
1416             );
1417         } catch (Exception $exc) {
1418             header('Content-Type: text/plain; charset=utf-8');
1419             echo $exc->getMessage();
1420             exit;
1421         }
1422         $now = new DateTime();
1423         header('Content-Type: text/html; charset=utf-8');
1424         header(
1425             'Content-disposition: attachment; filename=bookmarks_'
1426             .$selection.'_'.$now->format(LinkDB::LINK_DATE_FORMAT).'.html'
1427         );
1428         $PAGE->assign('date', $now->format(DateTime::RFC822));
1429         $PAGE->assign('eol', PHP_EOL);
1430         $PAGE->assign('selection', $selection);
1431         $PAGE->renderPage('export.bookmarks');
1432         exit;
1433     }
1434
1435     if ($targetPage == Router::$PAGE_IMPORT) {
1436         // Upload a Netscape bookmark dump to import its contents
1437
1438         if (! isset($_POST['token']) || ! isset($_FILES['filetoupload'])) {
1439             // Show import dialog
1440             $PAGE->assign(
1441                 'maxfilesize',
1442                 get_max_upload_size(
1443                     ini_get('post_max_size'),
1444                     ini_get('upload_max_filesize'),
1445                     false
1446                 )
1447             );
1448             $PAGE->assign(
1449                 'maxfilesizeHuman',
1450                 get_max_upload_size(
1451                     ini_get('post_max_size'),
1452                     ini_get('upload_max_filesize'),
1453                     true
1454                 )
1455             );
1456             $PAGE->assign('pagetitle', t('Import') .' - '. $conf->get('general.title', 'Shaarli'));
1457             $PAGE->renderPage('import');
1458             exit;
1459         }
1460
1461         // Import bookmarks from an uploaded file
1462         if (isset($_FILES['filetoupload']['size']) && $_FILES['filetoupload']['size'] == 0) {
1463             // The file is too big or some form field may be missing.
1464             $msg = sprintf(
1465                 t(
1466                     'The file you are trying to upload is probably bigger than what this webserver can accept'
1467                     .' (%s). Please upload in smaller chunks.'
1468                 ),
1469                 get_max_upload_size(ini_get('post_max_size'), ini_get('upload_max_filesize'))
1470             );
1471             echo '<script>alert("'. $msg .'");document.location=\'?do='.Router::$PAGE_IMPORT .'\';</script>';
1472             exit;
1473         }
1474         if (! $sessionManager->checkToken($_POST['token'])) {
1475             die('Wrong token.');
1476         }
1477         $status = NetscapeBookmarkUtils::import(
1478             $_POST,
1479             $_FILES,
1480             $LINKSDB,
1481             $conf,
1482             $history
1483         );
1484         echo '<script>alert("'.$status.'");document.location=\'?do='
1485              .Router::$PAGE_IMPORT .'\';</script>';
1486         exit;
1487     }
1488
1489     // Plugin administration page
1490     if ($targetPage == Router::$PAGE_PLUGINSADMIN) {
1491         $pluginMeta = $pluginManager->getPluginsMeta();
1492
1493         // Split plugins into 2 arrays: ordered enabled plugins and disabled.
1494         $enabledPlugins = array_filter($pluginMeta, function ($v) {
1495             return $v['order'] !== false;
1496         });
1497         // Load parameters.
1498         $enabledPlugins = load_plugin_parameter_values($enabledPlugins, $conf->get('plugins', array()));
1499         uasort(
1500             $enabledPlugins,
1501             function ($a, $b) {
1502                 return $a['order'] - $b['order'];
1503             }
1504         );
1505         $disabledPlugins = array_filter($pluginMeta, function ($v) {
1506             return $v['order'] === false;
1507         });
1508
1509         $PAGE->assign('enabledPlugins', $enabledPlugins);
1510         $PAGE->assign('disabledPlugins', $disabledPlugins);
1511         $PAGE->assign('pagetitle', t('Plugin administration') .' - '. $conf->get('general.title', 'Shaarli'));
1512         $PAGE->renderPage('pluginsadmin');
1513         exit;
1514     }
1515
1516     // Plugin administration form action
1517     if ($targetPage == Router::$PAGE_SAVE_PLUGINSADMIN) {
1518         try {
1519             if (isset($_POST['parameters_form'])) {
1520                 unset($_POST['parameters_form']);
1521                 foreach ($_POST as $param => $value) {
1522                     $conf->set('plugins.'. $param, escape($value));
1523                 }
1524             } else {
1525                 $conf->set('general.enabled_plugins', save_plugin_config($_POST));
1526             }
1527             $conf->write($loginManager->isLoggedIn());
1528             $history->updateSettings();
1529         } catch (Exception $e) {
1530             error_log(
1531                 'ERROR while saving plugin configuration:.' . PHP_EOL .
1532                 $e->getMessage()
1533             );
1534
1535             // TODO: do not handle exceptions/errors in JS.
1536             echo '<script>alert("'
1537                 . $e->getMessage()
1538                 .'");document.location=\'?do='
1539                 . Router::$PAGE_PLUGINSADMIN
1540                 .'\';</script>';
1541             exit;
1542         }
1543         header('Location: ?do='. Router::$PAGE_PLUGINSADMIN);
1544         exit;
1545     }
1546
1547     // Get a fresh token
1548     if ($targetPage == Router::$GET_TOKEN) {
1549         header('Content-Type:text/plain');
1550         echo $sessionManager->generateToken($conf);
1551         exit;
1552     }
1553
1554     // -------- Thumbnails Update
1555     if ($targetPage == Router::$PAGE_THUMBS_UPDATE) {
1556         $ids = [];
1557         foreach ($LINKSDB as $link) {
1558             // A note or not HTTP(S)
1559             if ($link['url'][0] === '?' || ! startsWith(strtolower($link['url']), 'http')) {
1560                 continue;
1561             }
1562             $ids[] = $link['id'];
1563         }
1564         $PAGE->assign('ids', $ids);
1565         $PAGE->assign('pagetitle', t('Thumbnails update') .' - '. $conf->get('general.title', 'Shaarli'));
1566         $PAGE->renderPage('thumbnails');
1567         exit;
1568     }
1569
1570     // -------- Single Thumbnail Update
1571     if ($targetPage == Router::$AJAX_THUMB_UPDATE) {
1572         if (! isset($_POST['id']) || ! ctype_digit($_POST['id'])) {
1573             http_response_code(400);
1574             exit;
1575         }
1576         $id = (int) $_POST['id'];
1577         if (empty($LINKSDB[$id])) {
1578             http_response_code(404);
1579             exit;
1580         }
1581         $thumbnailer = new Thumbnailer($conf);
1582         $link = $LINKSDB[$id];
1583         $link['thumbnail'] = $thumbnailer->get($link['url']);
1584         $LINKSDB[$id] = $link;
1585         $LINKSDB->save($conf->get('resource.page_cache'));
1586
1587         echo json_encode($link);
1588         exit;
1589     }
1590
1591     // -------- Otherwise, simply display search form and links:
1592     showLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
1593     exit;
1594 }
1595
1596 /**
1597  * Template for the list of links (<div id="linklist">)
1598  * This function fills all the necessary fields in the $PAGE for the template 'linklist.html'
1599  *
1600  * @param pageBuilder   $PAGE          pageBuilder instance.
1601  * @param LinkDB        $LINKSDB       LinkDB instance.
1602  * @param ConfigManager $conf          Configuration Manager instance.
1603  * @param PluginManager $pluginManager Plugin Manager instance.
1604  * @param LoginManager  $loginManager  LoginManager instance
1605  */
1606 function buildLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager)
1607 {
1608     // Used in templates
1609     if (isset($_GET['searchtags'])) {
1610         if (! empty($_GET['searchtags'])) {
1611             $searchtags = escape(normalize_spaces($_GET['searchtags']));
1612         } else {
1613             $searchtags = false;
1614         }
1615     } else {
1616         $searchtags = '';
1617     }
1618     $searchterm = !empty($_GET['searchterm']) ? escape(normalize_spaces($_GET['searchterm'])) : '';
1619
1620     // Smallhash filter
1621     if (! empty($_SERVER['QUERY_STRING'])
1622         && preg_match('/^[a-zA-Z0-9-_@]{6}($|&|#)/', $_SERVER['QUERY_STRING'])) {
1623         try {
1624             $linksToDisplay = $LINKSDB->filterHash($_SERVER['QUERY_STRING']);
1625         } catch (LinkNotFoundException $e) {
1626             $PAGE->render404($e->getMessage());
1627             exit;
1628         }
1629     } else {
1630         // Filter links according search parameters.
1631         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
1632         $request = [
1633             'searchtags' => $searchtags,
1634             'searchterm' => $searchterm,
1635         ];
1636         $linksToDisplay = $LINKSDB->filterSearch($request, false, $visibility, !empty($_SESSION['untaggedonly']));
1637     }
1638
1639     // ---- Handle paging.
1640     $keys = array();
1641     foreach ($linksToDisplay as $key => $value) {
1642         $keys[] = $key;
1643     }
1644
1645     // Select articles according to paging.
1646     $pagecount = ceil(count($keys) / $_SESSION['LINKS_PER_PAGE']);
1647     $pagecount = $pagecount == 0 ? 1 : $pagecount;
1648     $page= empty($_GET['page']) ? 1 : intval($_GET['page']);
1649     $page = $page < 1 ? 1 : $page;
1650     $page = $page > $pagecount ? $pagecount : $page;
1651     // Start index.
1652     $i = ($page-1) * $_SESSION['LINKS_PER_PAGE'];
1653     $end = $i + $_SESSION['LINKS_PER_PAGE'];
1654
1655     $thumbnailsEnabled = $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE) !== Thumbnailer::MODE_NONE;
1656     if ($thumbnailsEnabled) {
1657         $thumbnailer = new Thumbnailer($conf);
1658     }
1659
1660     $linkDisp = array();
1661     while ($i<$end && $i<count($keys)) {
1662         $link = $linksToDisplay[$keys[$i]];
1663         $link['description'] = format_description(
1664             $link['description'],
1665             $conf->get('redirector.url'),
1666             $conf->get('redirector.encode_url')
1667         );
1668         $classLi =  ($i % 2) != 0 ? '' : 'publicLinkHightLight';
1669         $link['class'] = $link['private'] == 0 ? $classLi : 'private';
1670         $link['timestamp'] = $link['created']->getTimestamp();
1671         if (! empty($link['updated'])) {
1672             $link['updated_timestamp'] = $link['updated']->getTimestamp();
1673         } else {
1674             $link['updated_timestamp'] = '';
1675         }
1676         $taglist = preg_split('/\s+/', $link['tags'], -1, PREG_SPLIT_NO_EMPTY);
1677         uasort($taglist, 'strcasecmp');
1678         $link['taglist'] = $taglist;
1679
1680         // Logged in, thumbnails enabled, not a note,
1681         // and (never retrieved yet or no valid cache file)
1682         if ($loginManager->isLoggedIn() && $thumbnailsEnabled && $link['url'][0] != '?'
1683             && (! isset($link['thumbnail']) || ($link['thumbnail'] !== false && ! is_file($link['thumbnail'])))
1684         ) {
1685             $elem = $LINKSDB[$keys[$i]];
1686             $elem['thumbnail'] = $thumbnailer->get($link['url']);
1687             $LINKSDB[$keys[$i]] = $elem;
1688             $updateDB = true;
1689             $link['thumbnail'] = $elem['thumbnail'];
1690         }
1691
1692         // Check for both signs of a note: starting with ? and 7 chars long.
1693         if ($link['url'][0] === '?' && strlen($link['url']) === 7) {
1694             $link['url'] = index_url($_SERVER) . $link['url'];
1695         }
1696
1697         $linkDisp[$keys[$i]] = $link;
1698         $i++;
1699     }
1700
1701     // If we retrieved new thumbnails, we update the database.
1702     if (!empty($updateDB)) {
1703         $LINKSDB->save($conf->get('resource.page_cache'));
1704     }
1705
1706     // Compute paging navigation
1707     $searchtagsUrl = $searchtags === '' ? '' : '&searchtags=' . urlencode($searchtags);
1708     $searchtermUrl = empty($searchterm) ? '' : '&searchterm=' . urlencode($searchterm);
1709     $previous_page_url = '';
1710     if ($i != count($keys)) {
1711         $previous_page_url = '?page=' . ($page+1) . $searchtermUrl . $searchtagsUrl;
1712     }
1713     $next_page_url='';
1714     if ($page>1) {
1715         $next_page_url = '?page=' . ($page-1) . $searchtermUrl . $searchtagsUrl;
1716     }
1717
1718     // Fill all template fields.
1719     $data = array(
1720         'previous_page_url' => $previous_page_url,
1721         'next_page_url' => $next_page_url,
1722         'page_current' => $page,
1723         'page_max' => $pagecount,
1724         'result_count' => count($linksToDisplay),
1725         'search_term' => $searchterm,
1726         'search_tags' => $searchtags,
1727         'visibility' => ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '',
1728         'redirector' => $conf->get('redirector.url'),  // Optional redirector URL.
1729         'links' => $linkDisp,
1730     );
1731
1732     // If there is only a single link, we change on-the-fly the title of the page.
1733     if (count($linksToDisplay) == 1) {
1734         $data['pagetitle'] = $linksToDisplay[$keys[0]]['title'] .' - '. $conf->get('general.title');
1735     } elseif (! empty($searchterm) || ! empty($searchtags)) {
1736         $data['pagetitle'] = t('Search: ');
1737         $data['pagetitle'] .= ! empty($searchterm) ? $searchterm .' ' : '';
1738         $bracketWrap = function ($tag) {
1739             return '['. $tag .']';
1740         };
1741         $data['pagetitle'] .= ! empty($searchtags)
1742             ? implode(' ', array_map($bracketWrap, preg_split('/\s+/', $searchtags))).' '
1743             : '';
1744         $data['pagetitle'] .= '- '. $conf->get('general.title');
1745     }
1746
1747     $pluginManager->executeHooks('render_linklist', $data, array('loggedin' => $loginManager->isLoggedIn()));
1748
1749     foreach ($data as $key => $value) {
1750         $PAGE->assign($key, $value);
1751     }
1752
1753     return;
1754 }
1755
1756 /**
1757  * Installation
1758  * This function should NEVER be called if the file data/config.php exists.
1759  *
1760  * @param ConfigManager  $conf           Configuration Manager instance.
1761  * @param SessionManager $sessionManager SessionManager instance
1762  * @param LoginManager   $loginManager   LoginManager instance
1763  */
1764 function install($conf, $sessionManager, $loginManager)
1765 {
1766     // On free.fr host, make sure the /sessions directory exists, otherwise login will not work.
1767     if (endsWith($_SERVER['HTTP_HOST'], '.free.fr') && !is_dir($_SERVER['DOCUMENT_ROOT'].'/sessions')) {
1768         mkdir($_SERVER['DOCUMENT_ROOT'].'/sessions', 0705);
1769     }
1770
1771
1772     // This part makes sure sessions works correctly.
1773     // (Because on some hosts, session.save_path may not be set correctly,
1774     // or we may not have write access to it.)
1775     if (isset($_GET['test_session'])
1776         && ( !isset($_SESSION) || !isset($_SESSION['session_tested']) || $_SESSION['session_tested']!='Working')) {
1777         // Step 2: Check if data in session is correct.
1778         $msg = t(
1779             '<pre>Sessions do not seem to work correctly on your server.<br>'.
1780             'Make sure the variable "session.save_path" is set correctly in your PHP config, '.
1781             'and that you have write access to it.<br>'.
1782             'It currently points to %s.<br>'.
1783             'On some browsers, accessing your server via a hostname like \'localhost\' '.
1784             'or any custom hostname without a dot causes cookie storage to fail. '.
1785             'We recommend accessing your server via it\'s IP address or Fully Qualified Domain Name.<br>'
1786         );
1787         $msg = sprintf($msg, session_save_path());
1788         echo $msg;
1789         echo '<br><a href="?">'. t('Click to try again.') .'</a></pre>';
1790         die;
1791     }
1792     if (!isset($_SESSION['session_tested'])) {
1793         // Step 1 : Try to store data in session and reload page.
1794         $_SESSION['session_tested'] = 'Working';  // Try to set a variable in session.
1795         header('Location: '.index_url($_SERVER).'?test_session');  // Redirect to check stored data.
1796     }
1797     if (isset($_GET['test_session'])) {
1798         // Step 3: Sessions are OK. Remove test parameter from URL.
1799         header('Location: '.index_url($_SERVER));
1800     }
1801
1802
1803     if (!empty($_POST['setlogin']) && !empty($_POST['setpassword'])) {
1804         $tz = 'UTC';
1805         if (!empty($_POST['continent']) && !empty($_POST['city'])
1806             && isTimeZoneValid($_POST['continent'], $_POST['city'])
1807         ) {
1808             $tz = $_POST['continent'].'/'.$_POST['city'];
1809         }
1810         $conf->set('general.timezone', $tz);
1811         $login = $_POST['setlogin'];
1812         $conf->set('credentials.login', $login);
1813         $salt = sha1(uniqid('', true) .'_'. mt_rand());
1814         $conf->set('credentials.salt', $salt);
1815         $conf->set('credentials.hash', sha1($_POST['setpassword'] . $login . $salt));
1816         if (!empty($_POST['title'])) {
1817             $conf->set('general.title', escape($_POST['title']));
1818         } else {
1819             $conf->set('general.title', 'Shared links on '.escape(index_url($_SERVER)));
1820         }
1821         $conf->set('translation.language', escape($_POST['language']));
1822         $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1823         $conf->set('api.enabled', !empty($_POST['enableApi']));
1824         $conf->set(
1825             'api.secret',
1826             generate_api_secret(
1827                 $conf->get('credentials.login'),
1828                 $conf->get('credentials.salt')
1829             )
1830         );
1831         try {
1832             // Everything is ok, let's create config file.
1833             $conf->write($loginManager->isLoggedIn());
1834         } catch (Exception $e) {
1835             error_log(
1836                 'ERROR while writing config file after installation.' . PHP_EOL .
1837                     $e->getMessage()
1838             );
1839
1840             // TODO: do not handle exceptions/errors in JS.
1841             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?\';</script>';
1842             exit;
1843         }
1844         echo '<script>alert('
1845             .'"Shaarli is now configured. '
1846             .'Please enter your login/password and start shaaring your links!"'
1847             .');document.location=\'?do=login\';</script>';
1848         exit;
1849     }
1850
1851     $PAGE = new PageBuilder($conf, $_SESSION, null, $sessionManager->generateToken());
1852     list($continents, $cities) = generateTimeZoneData(timezone_identifiers_list(), date_default_timezone_get());
1853     $PAGE->assign('continents', $continents);
1854     $PAGE->assign('cities', $cities);
1855     $PAGE->assign('languages', Languages::getAvailableLanguages());
1856     $PAGE->renderPage('install');
1857     exit;
1858 }
1859
1860 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=dailyrss')) {
1861     showDailyRSS($conf, $loginManager);
1862     exit;
1863 }
1864
1865 if (!isset($_SESSION['LINKS_PER_PAGE'])) {
1866     $_SESSION['LINKS_PER_PAGE'] = $conf->get('general.links_per_page', 20);
1867 }
1868
1869 try {
1870     $history = new History($conf->get('resource.history'));
1871 } catch (Exception $e) {
1872     die($e->getMessage());
1873 }
1874
1875 $linkDb = new LinkDB(
1876     $conf->get('resource.datastore'),
1877     $loginManager->isLoggedIn(),
1878     $conf->get('privacy.hide_public_links'),
1879     $conf->get('redirector.url'),
1880     $conf->get('redirector.encode_url')
1881 );
1882
1883 $container = new \Slim\Container();
1884 $container['conf'] = $conf;
1885 $container['plugins'] = $pluginManager;
1886 $container['history'] = $history;
1887 $app = new \Slim\App($container);
1888
1889 // REST API routes
1890 $app->group('/api/v1', function () {
1891     $this->get('/info', '\Shaarli\Api\Controllers\Info:getInfo')->setName('getInfo');
1892     $this->get('/links', '\Shaarli\Api\Controllers\Links:getLinks')->setName('getLinks');
1893     $this->get('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:getLink')->setName('getLink');
1894     $this->post('/links', '\Shaarli\Api\Controllers\Links:postLink')->setName('postLink');
1895     $this->put('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:putLink')->setName('putLink');
1896     $this->delete('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:deleteLink')->setName('deleteLink');
1897
1898     $this->get('/tags', '\Shaarli\Api\Controllers\Tags:getTags')->setName('getTags');
1899     $this->get('/tags/{tagName:[\w]+}', '\Shaarli\Api\Controllers\Tags:getTag')->setName('getTag');
1900     $this->put('/tags/{tagName:[\w]+}', '\Shaarli\Api\Controllers\Tags:putTag')->setName('putTag');
1901     $this->delete('/tags/{tagName:[\w]+}', '\Shaarli\Api\Controllers\Tags:deleteTag')->setName('deleteTag');
1902
1903     $this->get('/history', '\Shaarli\Api\Controllers\History:getHistory')->setName('getHistory');
1904 })->add('\Shaarli\Api\ApiMiddleware');
1905
1906 $response = $app->run(true);
1907
1908 // Hack to make Slim and Shaarli router work together:
1909 // If a Slim route isn't found and NOT API call, we call renderPage().
1910 if ($response->getStatusCode() == 404 && strpos($_SERVER['REQUEST_URI'], '/api/v1') === false) {
1911     // We use UTF-8 for proper international characters handling.
1912     header('Content-Type: text/html; charset=utf-8');
1913     renderPage($conf, $pluginManager, $linkDb, $history, $sessionManager, $loginManager);
1914 } else {
1915     $response = $response
1916         ->withHeader('Access-Control-Allow-Origin', '*')
1917         ->withHeader(
1918             'Access-Control-Allow-Headers',
1919             'X-Requested-With, Content-Type, Accept, Origin, Authorization'
1920         )
1921         ->withHeader('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE, OPTIONS');
1922     $app->respond($response);
1923 }