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/bookmark/LinkUtils.php';
  60 require_once 'application/config/ConfigPlugin.php';
  61 require_once 'application/feed/Cache.php';
  62 require_once 'application/http/HttpUtils.php';
  63 require_once 'application/http/UrlUtils.php';
  64 require_once 'application/updater/UpdaterUtils.php';
  65 require_once 'application/FileUtils.php';
  66 require_once 'application/TimeZone.php';
  67 require_once 'application/Utils.php';
  68
  69 use \Shaarli\ApplicationUtils;
  70 use \Shaarli\Bookmark\Exception\LinkNotFoundException;
  71 use \Shaarli\Bookmark\LinkDB;
  72 use \Shaarli\Config\ConfigManager;
  73 use \Shaarli\Feed\CachedPage;
  74 use \Shaarli\Feed\FeedBuilder;
  75 use \Shaarli\History;
  76 use \Shaarli\Languages;
  77 use \Shaarli\Netscape\NetscapeBookmarkUtils;
  78 use \Shaarli\Plugin\PluginManager;
  79 use \Shaarli\Render\PageBuilder;
  80 use \Shaarli\Render\ThemeUtils;
  81 use \Shaarli\Router;
  82 use \Shaarli\Security\LoginManager;
  83 use \Shaarli\Security\SessionManager;
  84 use \Shaarli\Thumbnailer;
  85 use \Shaarli\Updater\Updater;
  86
  87 // Ensure the PHP version is supported
  88 try {
  89     ApplicationUtils::checkPHPVersion('5.5', PHP_VERSION);
  90 } catch (Exception $exc) {
  91     header('Content-Type: text/plain; charset=utf-8');
  92     echo $exc->getMessage();
  93     exit;
  94 }
  95
  96 define('SHAARLI_VERSION', ApplicationUtils::getVersion(__DIR__ .'/'. ApplicationUtils::$VERSION_FILE));
  97
  98 // Force cookie path (but do not change lifetime)
  99 $cookie = session_get_cookie_params();
 100 $cookiedir = '';
 101 if (dirname($_SERVER['SCRIPT_NAME']) != '/') {
 102     $cookiedir = dirname($_SERVER["SCRIPT_NAME"]).'/';
 103 }
 104 // Set default cookie expiration and path.
 105 session_set_cookie_params($cookie['lifetime'], $cookiedir, $_SERVER['SERVER_NAME']);
 106 // Set session parameters on server side.
 107 // Use cookies to store session.
 108 ini_set('session.use_cookies', 1);
 109 // Force cookies for session (phpsessionID forbidden in URL).
 110 ini_set('session.use_only_cookies', 1);
 111 // Prevent PHP form using sessionID in URL if cookies are disabled.
 112 ini_set('session.use_trans_sid', false);
 113
 114 session_name('shaarli');
 115 // Start session if needed (Some server auto-start sessions).
 116 if (session_status() == PHP_SESSION_NONE) {
 117     session_start();
 118 }
 119
 120 // Regenerate session ID if invalid or not defined in cookie.
 121 if (isset($_COOKIE['shaarli']) && !SessionManager::checkId($_COOKIE['shaarli'])) {
 122     session_regenerate_id(true);
 123     $_COOKIE['shaarli'] = session_id();
 124 }
 125
 126 $conf = new ConfigManager();
 127 $sessionManager = new SessionManager($_SESSION, $conf);
 128 $loginManager = new LoginManager($conf, $sessionManager);
 129 $loginManager->generateStaySignedInToken($_SERVER['REMOTE_ADDR']);
 130 $clientIpId = client_ip_id($_SERVER);
 131
 132 // LC_MESSAGES isn't defined without php-intl, in this case use LC_COLLATE locale instead.
 133 if (! defined('LC_MESSAGES')) {
 134     define('LC_MESSAGES', LC_COLLATE);
 135 }
 136
 137 // Sniff browser language and set date format accordingly.
 138 if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
 139     autoLocale($_SERVER['HTTP_ACCEPT_LANGUAGE']);
 140 }
 141
 142 new Languages(setlocale(LC_MESSAGES, 0), $conf);
 143
 144 $conf->setEmpty('general.timezone', date_default_timezone_get());
 145 $conf->setEmpty('general.title', t('Shared links on '). escape(index_url($_SERVER)));
 146 RainTPL::$tpl_dir = $conf->get('resource.raintpl_tpl').'/'.$conf->get('resource.theme').'/'; // template directory
 147 RainTPL::$cache_dir = $conf->get('resource.raintpl_tmp'); // cache directory
 148
 149 $pluginManager = new PluginManager($conf);
 150 $pluginManager->load($conf->get('general.enabled_plugins'));
 151
 152 date_default_timezone_set($conf->get('general.timezone', 'UTC'));
 153
 154 ob_start();  // Output buffering for the page cache.
 155
 156 // Prevent caching on client side or proxy: (yes, it's ugly)
 157 header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
 158 header("Cache-Control: no-store, no-cache, must-revalidate");
 159 header("Cache-Control: post-check=0, pre-check=0", false);
 160 header("Pragma: no-cache");
 161
 162 if (! is_file($conf->getConfigFileExt())) {
 163     // Ensure Shaarli has proper access to its resources
 164     $errors = ApplicationUtils::checkResourcePermissions($conf);
 165
 166     if ($errors != array()) {
 167         $message = '<p>'. t('Insufficient permissions:') .'</p><ul>';
 168
 169         foreach ($errors as $error) {
 170             $message .= '<li>'.$error.'</li>';
 171         }
 172         $message .= '</ul>';
 173
 174         header('Content-Type: text/html; charset=utf-8');
 175         echo $message;
 176         exit;
 177     }
 178
 179     // Display the installation form if no existing config is found
 180     install($conf, $sessionManager, $loginManager);
 181 }
 182
 183 $loginManager->checkLoginState($_COOKIE, $clientIpId);
 184
 185 /**
 186  * Adapter function to ensure compatibility with third-party templates
 187  *
 188  * @see https://github.com/shaarli/Shaarli/pull/1086
 189  *
 190  * @return bool true when the user is logged in, false otherwise
 191  */
 192 function isLoggedIn()
 193 {
 194     global $loginManager;
 195     return $loginManager->isLoggedIn();
 196 }
 197
 198
 199 // ------------------------------------------------------------------------------------------
 200 // Process login form: Check if login/password is correct.
 201 if (isset($_POST['login'])) {
 202     if (! $loginManager->canLogin($_SERVER)) {
 203         die(t('I said: NO. You are banned for the moment. Go away.'));
 204     }
 205     if (isset($_POST['password'])
 206         && $sessionManager->checkToken($_POST['token'])
 207         && $loginManager->checkCredentials($_SERVER['REMOTE_ADDR'], $clientIpId, $_POST['login'], $_POST['password'])
 208     ) {
 209         $loginManager->handleSuccessfulLogin($_SERVER);
 210
 211         $cookiedir = '';
 212         if (dirname($_SERVER['SCRIPT_NAME']) != '/') {
 213             // Note: Never forget the trailing slash on the cookie path!
 214             $cookiedir = dirname($_SERVER["SCRIPT_NAME"]) . '/';
 215         }
 216
 217         if (!empty($_POST['longlastingsession'])) {
 218             // Keep the session cookie even after the browser closes
 219             $sessionManager->setStaySignedIn(true);
 220             $expirationTime = $sessionManager->extendSession();
 221
 222             setcookie(
 223                 $loginManager::$STAY_SIGNED_IN_COOKIE,
 224                 $loginManager->getStaySignedInToken(),
 225                 $expirationTime,
 226                 WEB_PATH
 227             );
 228         } else {
 229             // Standard session expiration (=when browser closes)
 230             $expirationTime = 0;
 231         }
 232
 233         // Send cookie with the new expiration date to the browser
 234         session_set_cookie_params($expirationTime, $cookiedir, $_SERVER['SERVER_NAME']);
 235         session_regenerate_id(true);
 236
 237         // Optional redirect after login:
 238         if (isset($_GET['post'])) {
 239             $uri = '?post='. urlencode($_GET['post']);
 240             foreach (array('description', 'source', 'title', 'tags') as $param) {
 241                 if (!empty($_GET[$param])) {
 242                     $uri .= '&'.$param.'='.urlencode($_GET[$param]);
 243                 }
 244             }
 245             header('Location: '. $uri);
 246             exit;
 247         }
 248
 249         if (isset($_GET['edit_link'])) {
 250             header('Location: ?edit_link='. escape($_GET['edit_link']));
 251             exit;
 252         }
 253
 254         if (isset($_POST['returnurl'])) {
 255             // Prevent loops over login screen.
 256             if (strpos($_POST['returnurl'], 'do=login') === false) {
 257                 header('Location: '. generateLocation($_POST['returnurl'], $_SERVER['HTTP_HOST']));
 258                 exit;
 259             }
 260         }
 261         header('Location: ?');
 262         exit;
 263     } else {
 264         $loginManager->handleFailedLogin($_SERVER);
 265         $redir = '&username='. urlencode($_POST['login']);
 266         if (isset($_GET['post'])) {
 267             $redir .= '&post=' . urlencode($_GET['post']);
 268             foreach (array('description', 'source', 'title', 'tags') as $param) {
 269                 if (!empty($_GET[$param])) {
 270                     $redir .= '&' . $param . '=' . urlencode($_GET[$param]);
 271                 }
 272             }
 273         }
 274         // Redirect to login screen.
 275         echo '<script>alert("'. t("Wrong login/password.") .'");document.location=\'?do=login'.$redir.'\';</script>';
 276         exit;
 277     }
 278 }
 279
 280 // ------------------------------------------------------------------------------------------
 281 // Token management for XSRF protection
 282 // Token should be used in any form which acts on data (create,update,delete,import...).
 283 if (!isset($_SESSION['tokens'])) {
 284     $_SESSION['tokens']=array();  // Token are attached to the session.
 285 }
 286
 287 /**
 288  * Daily RSS feed: 1 RSS entry per day giving all the links on that day.
 289  * Gives the last 7 days (which have links).
 290  * This RSS feed cannot be filtered.
 291  *
 292  * @param ConfigManager $conf         Configuration Manager instance
 293  * @param LoginManager  $loginManager LoginManager instance
 294  */
 295 function showDailyRSS($conf, $loginManager)
 296 {
 297     // Cache system
 298     $query = $_SERVER['QUERY_STRING'];
 299     $cache = new CachedPage(
 300         $conf->get('config.PAGE_CACHE'),
 301         page_url($_SERVER),
 302         startsWith($query, 'do=dailyrss') && !$loginManager->isLoggedIn()
 303     );
 304     $cached = $cache->cachedVersion();
 305     if (!empty($cached)) {
 306         echo $cached;
 307         exit;
 308     }
 309
 310     // If cached was not found (or not usable), then read the database and build the response:
 311     // Read links from database (and filter private links if used it not logged in).
 312     $LINKSDB = new LinkDB(
 313         $conf->get('resource.datastore'),
 314         $loginManager->isLoggedIn(),
 315         $conf->get('privacy.hide_public_links')
 316     );
 317
 318     /* Some Shaarlies may have very few links, so we need to look
 319        back in time until we have enough days ($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             $link['formatedDescription'] = format_description($link['description']);
 358             $link['timestamp'] = $link['created']->getTimestamp();
 359             if (is_note($link['url'])) {
 360                 $link['url'] = index_url($_SERVER) . $link['url'];  // make permalink URL absolute
 361             }
 362         }
 363
 364         // Then build the HTML for this day:
 365         $tpl = new RainTPL;
 366         $tpl->assign('title', $conf->get('general.title'));
 367         $tpl->assign('daydate', $dayDate->getTimestamp());
 368         $tpl->assign('absurl', $absurl);
 369         $tpl->assign('links', $links);
 370         $tpl->assign('rssdate', escape($dayDate->format(DateTime::RSS)));
 371         $tpl->assign('hide_timestamps', $conf->get('privacy.hide_timestamps', false));
 372         $tpl->assign('index_url', $pageaddr);
 373         $html = $tpl->draw('dailyrss', true);
 374
 375         echo $html . PHP_EOL;
 376     }
 377     echo '</channel></rss><!-- Cached version of '. escape(page_url($_SERVER)) .' -->';
 378
 379     $cache->cache(ob_get_contents());
 380     ob_end_flush();
 381     exit;
 382 }
 383
 384 /**
 385  * Show the 'Daily' page.
 386  *
 387  * @param PageBuilder   $pageBuilder   Template engine wrapper.
 388  * @param LinkDB        $LINKSDB       LinkDB instance.
 389  * @param ConfigManager $conf          Configuration Manager instance.
 390  * @param PluginManager $pluginManager Plugin Manager instance.
 391  * @param LoginManager  $loginManager  Login Manager instance
 392  */
 393 function showDaily($pageBuilder, $LINKSDB, $conf, $pluginManager, $loginManager)
 394 {
 395     $day = date('Ymd', strtotime('-1 day')); // Yesterday, in format YYYYMMDD.
 396     if (isset($_GET['day'])) {
 397         $day = $_GET['day'];
 398     }
 399
 400     $days = $LINKSDB->days();
 401     $i = array_search($day, $days);
 402     if ($i === false && count($days)) {
 403         // no links for day, but at least one day with links
 404         $i = count($days) - 1;
 405         $day = $days[$i];
 406     }
 407     $previousday = '';
 408     $nextday = '';
 409
 410     if ($i !== false) {
 411         if ($i >= 1) {
 412              $previousday=$days[$i - 1];
 413         }
 414         if ($i < count($days) - 1) {
 415             $nextday = $days[$i + 1];
 416         }
 417     }
 418     try {
 419         $linksToDisplay = $LINKSDB->filterDay($day);
 420     } catch (Exception $exc) {
 421         error_log($exc);
 422         $linksToDisplay = array();
 423     }
 424
 425     // We pre-format some fields for proper output.
 426     foreach ($linksToDisplay as $key => $link) {
 427         $taglist = explode(' ', $link['tags']);
 428         uasort($taglist, 'strcasecmp');
 429         $linksToDisplay[$key]['taglist']=$taglist;
 430         $linksToDisplay[$key]['formatedDescription'] = format_description($link['description']);
 431         $linksToDisplay[$key]['timestamp'] =  $link['created']->getTimestamp();
 432     }
 433
 434     $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 435     $data = array(
 436         'pagetitle' => $conf->get('general.title') .' - '. format_date($dayDate, false),
 437         'linksToDisplay' => $linksToDisplay,
 438         'day' => $dayDate->getTimestamp(),
 439         'dayDate' => $dayDate,
 440         'previousday' => $previousday,
 441         'nextday' => $nextday,
 442     );
 443
 444     /* Hook is called before column construction so that plugins don't have
 445        to deal with columns. */
 446     $pluginManager->executeHooks('render_daily', $data, array('loggedin' => $loginManager->isLoggedIn()));
 447
 448     /* We need to spread the articles on 3 columns.
 449        I did not want to use a JavaScript lib like http://masonry.desandro.com/
 450        so I manually spread entries with a simple method: I roughly evaluate the
 451        height of a div according to title and description length.
 452     */
 453     $columns = array(array(), array(), array()); // Entries to display, for each column.
 454     $fill = array(0, 0, 0);  // Rough estimate of columns fill.
 455     foreach ($data['linksToDisplay'] as $key => $link) {
 456         // Roughly estimate length of entry (by counting characters)
 457         // Title: 30 chars = 1 line. 1 line is 30 pixels height.
 458         // Description: 836 characters gives roughly 342 pixel height.
 459         // This is not perfect, but it's usually OK.
 460         $length = strlen($link['title']) + (342 * strlen($link['description'])) / 836;
 461         if ($link['thumbnail']) {
 462             $length += 100; // 1 thumbnails roughly takes 100 pixels height.
 463         }
 464         // Then put in column which is the less filled:
 465         $smallest = min($fill); // find smallest value in array.
 466         $index = array_search($smallest, $fill); // find index of this smallest value.
 467         array_push($columns[$index], $link); // Put entry in this column.
 468         $fill[$index] += $length;
 469     }
 470
 471     $data['cols'] = $columns;
 472
 473     foreach ($data as $key => $value) {
 474         $pageBuilder->assign($key, $value);
 475     }
 476
 477     $pageBuilder->assign('pagetitle', t('Daily') .' - '. $conf->get('general.title', 'Shaarli'));
 478     $pageBuilder->renderPage('daily');
 479     exit;
 480 }
 481
 482 /**
 483  * Renders the linklist
 484  *
 485  * @param pageBuilder   $PAGE    pageBuilder instance.
 486  * @param LinkDB        $LINKSDB LinkDB instance.
 487  * @param ConfigManager $conf    Configuration Manager instance.
 488  * @param PluginManager $pluginManager Plugin Manager instance.
 489  */
 490 function showLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager)
 491 {
 492     buildLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
 493     $PAGE->renderPage('linklist');
 494 }
 495
 496 /**
 497  * Render HTML page (according to URL parameters and user rights)
 498  *
 499  * @param ConfigManager  $conf           Configuration Manager instance.
 500  * @param PluginManager  $pluginManager  Plugin Manager instance,
 501  * @param LinkDB         $LINKSDB
 502  * @param History        $history        instance
 503  * @param SessionManager $sessionManager SessionManager instance
 504  * @param LoginManager   $loginManager   LoginManager instance
 505  */
 506 function renderPage($conf, $pluginManager, $LINKSDB, $history, $sessionManager, $loginManager)
 507 {
 508     $updater = new Updater(
 509         read_updates_file($conf->get('resource.updates')),
 510         $LINKSDB,
 511         $conf,
 512         $loginManager->isLoggedIn(),
 513         $_SESSION
 514     );
 515     try {
 516         $newUpdates = $updater->update();
 517         if (! empty($newUpdates)) {
 518             write_updates_file(
 519                 $conf->get('resource.updates'),
 520                 $updater->getDoneUpdates()
 521             );
 522         }
 523     } catch (Exception $e) {
 524         die($e->getMessage());
 525     }
 526
 527     $PAGE = new PageBuilder($conf, $_SESSION, $LINKSDB, $sessionManager->generateToken(), $loginManager->isLoggedIn());
 528     $PAGE->assign('linkcount', count($LINKSDB));
 529     $PAGE->assign('privateLinkcount', count_private($LINKSDB));
 530     $PAGE->assign('plugin_errors', $pluginManager->getErrors());
 531
 532     // Determine which page will be rendered.
 533     $query = (isset($_SERVER['QUERY_STRING'])) ? $_SERVER['QUERY_STRING'] : '';
 534     $targetPage = Router::findPage($query, $_GET, $loginManager->isLoggedIn());
 535
 536     if (// if the user isn't logged in
 537         !$loginManager->isLoggedIn() &&
 538         // and Shaarli doesn't have public content...
 539         $conf->get('privacy.hide_public_links') &&
 540         // and is configured to enforce the login
 541         $conf->get('privacy.force_login') &&
 542         // and the current page isn't already the login page
 543         $targetPage !== Router::$PAGE_LOGIN &&
 544         // and the user is not requesting a feed (which would lead to a different content-type as expected)
 545         $targetPage !== Router::$PAGE_FEED_ATOM &&
 546         $targetPage !== Router::$PAGE_FEED_RSS
 547     ) {
 548         // force current page to be the login page
 549         $targetPage = Router::$PAGE_LOGIN;
 550     }
 551
 552     // Call plugin hooks for header, footer and includes, specifying which page will be rendered.
 553     // Then assign generated data to RainTPL.
 554     $common_hooks = array(
 555         'includes',
 556         'header',
 557         'footer',
 558     );
 559
 560     foreach ($common_hooks as $name) {
 561         $plugin_data = array();
 562         $pluginManager->executeHooks(
 563             'render_' . $name,
 564             $plugin_data,
 565             array(
 566                 'target' => $targetPage,
 567                 'loggedin' => $loginManager->isLoggedIn()
 568             )
 569         );
 570         $PAGE->assign('plugins_' . $name, $plugin_data);
 571     }
 572
 573     // -------- Display login form.
 574     if ($targetPage == Router::$PAGE_LOGIN) {
 575         if ($conf->get('security.open_shaarli')) {
 576             header('Location: ?');
 577             exit;
 578         }  // No need to login for open Shaarli
 579         if (isset($_GET['username'])) {
 580             $PAGE->assign('username', escape($_GET['username']));
 581         }
 582         $PAGE->assign('returnurl', (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']):''));
 583         // add default state of the 'remember me' checkbox
 584         $PAGE->assign('remember_user_default', $conf->get('privacy.remember_user_default'));
 585         $PAGE->assign('user_can_login', $loginManager->canLogin($_SERVER));
 586         $PAGE->assign('pagetitle', t('Login') .' - '. $conf->get('general.title', 'Shaarli'));
 587         $PAGE->renderPage('loginform');
 588         exit;
 589     }
 590     // -------- User wants to logout.
 591     if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=logout')) {
 592         invalidateCaches($conf->get('resource.page_cache'));
 593         $sessionManager->logout();
 594         setcookie(LoginManager::$STAY_SIGNED_IN_COOKIE, 'false', 0, WEB_PATH);
 595         header('Location: ?');
 596         exit;
 597     }
 598
 599     // -------- Picture wall
 600     if ($targetPage == Router::$PAGE_PICWALL) {
 601         $PAGE->assign('pagetitle', t('Picture wall') .' - '. $conf->get('general.title', 'Shaarli'));
 602         if (! $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE) === Thumbnailer::MODE_NONE) {
 603             $PAGE->assign('linksToDisplay', []);
 604             $PAGE->renderPage('picwall');
 605             exit;
 606         }
 607
 608         // Optionally filter the results:
 609         $links = $LINKSDB->filterSearch($_GET);
 610         $linksToDisplay = array();
 611
 612         // Get only links which have a thumbnail.
 613         // Note: we do not retrieve thumbnails here, the request is too heavy.
 614         foreach ($links as $key => $link) {
 615             if (isset($link['thumbnail']) && $link['thumbnail'] !== false) {
 616                 $linksToDisplay[] = $link; // Add to array.
 617             }
 618         }
 619
 620         $data = array(
 621             'linksToDisplay' => $linksToDisplay,
 622         );
 623         $pluginManager->executeHooks('render_picwall', $data, array('loggedin' => $loginManager->isLoggedIn()));
 624
 625         foreach ($data as $key => $value) {
 626             $PAGE->assign($key, $value);
 627         }
 628
 629
 630         $PAGE->renderPage('picwall');
 631         exit;
 632     }
 633
 634     // -------- Tag cloud
 635     if ($targetPage == Router::$PAGE_TAGCLOUD) {
 636         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
 637         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 638         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 639
 640         // We sort tags alphabetically, then choose a font size according to count.
 641         // First, find max value.
 642         $maxcount = 0;
 643         foreach ($tags as $value) {
 644             $maxcount = max($maxcount, $value);
 645         }
 646
 647         alphabetical_sort($tags, false, true);
 648
 649         $tagList = array();
 650         foreach ($tags as $key => $value) {
 651             if (in_array($key, $filteringTags)) {
 652                 continue;
 653             }
 654             // Tag font size scaling:
 655             //   default 15 and 30 logarithm bases affect scaling,
 656             //   22 and 6 are arbitrary font sizes for max and min sizes.
 657             $size = log($value, 15) / log($maxcount, 30) * 2.2 + 0.8;
 658             $tagList[$key] = array(
 659                 'count' => $value,
 660                 'size' => number_format($size, 2, '.', ''),
 661             );
 662         }
 663
 664         $searchTags = implode(' ', escape($filteringTags));
 665         $data = array(
 666             'search_tags' => $searchTags,
 667             'tags' => $tagList,
 668         );
 669         $pluginManager->executeHooks('render_tagcloud', $data, array('loggedin' => $loginManager->isLoggedIn()));
 670
 671         foreach ($data as $key => $value) {
 672             $PAGE->assign($key, $value);
 673         }
 674
 675         $searchTags = ! empty($searchTags) ? $searchTags .' - ' : '';
 676         $PAGE->assign('pagetitle', $searchTags. t('Tag cloud') .' - '. $conf->get('general.title', 'Shaarli'));
 677         $PAGE->renderPage('tag.cloud');
 678         exit;
 679     }
 680
 681     // -------- Tag list
 682     if ($targetPage == Router::$PAGE_TAGLIST) {
 683         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
 684         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 685         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 686         foreach ($filteringTags as $tag) {
 687             if (array_key_exists($tag, $tags)) {
 688                 unset($tags[$tag]);
 689             }
 690         }
 691
 692         if (! empty($_GET['sort']) && $_GET['sort'] === 'alpha') {
 693             alphabetical_sort($tags, false, true);
 694         }
 695
 696         $searchTags = implode(' ', escape($filteringTags));
 697         $data = [
 698             'search_tags' => $searchTags,
 699             'tags' => $tags,
 700         ];
 701         $pluginManager->executeHooks('render_taglist', $data, ['loggedin' => $loginManager->isLoggedIn()]);
 702
 703         foreach ($data as $key => $value) {
 704             $PAGE->assign($key, $value);
 705         }
 706
 707         $searchTags = ! empty($searchTags) ? $searchTags .' - ' : '';
 708         $PAGE->assign('pagetitle', $searchTags . t('Tag list') .' - '. $conf->get('general.title', 'Shaarli'));
 709         $PAGE->renderPage('tag.list');
 710         exit;
 711     }
 712
 713     // Daily page.
 714     if ($targetPage == Router::$PAGE_DAILY) {
 715         showDaily($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
 716     }
 717
 718     // ATOM and RSS feed.
 719     if ($targetPage == Router::$PAGE_FEED_ATOM || $targetPage == Router::$PAGE_FEED_RSS) {
 720         $feedType = $targetPage == Router::$PAGE_FEED_RSS ? FeedBuilder::$FEED_RSS : FeedBuilder::$FEED_ATOM;
 721         header('Content-Type: application/'. $feedType .'+xml; charset=utf-8');
 722
 723         // Cache system
 724         $query = $_SERVER['QUERY_STRING'];
 725         $cache = new CachedPage(
 726             $conf->get('resource.page_cache'),
 727             page_url($_SERVER),
 728             startsWith($query, 'do='. $targetPage) && !$loginManager->isLoggedIn()
 729         );
 730         $cached = $cache->cachedVersion();
 731         if (!empty($cached)) {
 732             echo $cached;
 733             exit;
 734         }
 735
 736         // Generate data.
 737         $feedGenerator = new FeedBuilder($LINKSDB, $feedType, $_SERVER, $_GET, $loginManager->isLoggedIn());
 738         $feedGenerator->setLocale(strtolower(setlocale(LC_COLLATE, 0)));
 739         $feedGenerator->setHideDates($conf->get('privacy.hide_timestamps') && !$loginManager->isLoggedIn());
 740         $feedGenerator->setUsePermalinks(isset($_GET['permalinks']) || !$conf->get('feed.rss_permalinks'));
 741         $data = $feedGenerator->buildData();
 742
 743         // Process plugin hook.
 744         $pluginManager->executeHooks('render_feed', $data, array(
 745             'loggedin' => $loginManager->isLoggedIn(),
 746             'target' => $targetPage,
 747         ));
 748
 749         // Render the template.
 750         $PAGE->assignAll($data);
 751         $PAGE->renderPage('feed.'. $feedType);
 752         $cache->cache(ob_get_contents());
 753         ob_end_flush();
 754         exit;
 755     }
 756
 757     // Display opensearch plugin (XML)
 758     if ($targetPage == Router::$PAGE_OPENSEARCH) {
 759         header('Content-Type: application/xml; charset=utf-8');
 760         $PAGE->assign('serverurl', index_url($_SERVER));
 761         $PAGE->renderPage('opensearch');
 762         exit;
 763     }
 764
 765     // -------- User clicks on a tag in a link: The tag is added to the list of searched tags (searchtags=...)
 766     if (isset($_GET['addtag'])) {
 767         // Get previous URL (http_referer) and add the tag to the searchtags parameters in query.
 768         if (empty($_SERVER['HTTP_REFERER'])) {
 769             // In case browser does not send HTTP_REFERER
 770             header('Location: ?searchtags='.urlencode($_GET['addtag']));
 771             exit;
 772         }
 773         parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $params);
 774
 775         // Prevent redirection loop
 776         if (isset($params['addtag'])) {
 777             unset($params['addtag']);
 778         }
 779
 780         // Check if this tag is already in the search query and ignore it if it is.
 781         // Each tag is always separated by a space
 782         if (isset($params['searchtags'])) {
 783             $current_tags = explode(' ', $params['searchtags']);
 784         } else {
 785             $current_tags = array();
 786         }
 787         $addtag = true;
 788         foreach ($current_tags as $value) {
 789             if ($value === $_GET['addtag']) {
 790                 $addtag = false;
 791                 break;
 792             }
 793         }
 794         // Append the tag if necessary
 795         if (empty($params['searchtags'])) {
 796             $params['searchtags'] = trim($_GET['addtag']);
 797         } elseif ($addtag) {
 798             $params['searchtags'] = trim($params['searchtags']).' '.trim($_GET['addtag']);
 799         }
 800
 801         // We also remove page (keeping the same page has no sense, since the
 802         // results are different)
 803         unset($params['page']);
 804
 805         header('Location: ?'.http_build_query($params));
 806         exit;
 807     }
 808
 809     // -------- User clicks on a tag in result count: Remove the tag from the list of searched tags (searchtags=...)
 810     if (isset($_GET['removetag'])) {
 811         // Get previous URL (http_referer) and remove the tag from the searchtags parameters in query.
 812         if (empty($_SERVER['HTTP_REFERER'])) {
 813             header('Location: ?');
 814             exit;
 815         }
 816
 817         // In case browser does not send HTTP_REFERER
 818         parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $params);
 819
 820         // Prevent redirection loop
 821         if (isset($params['removetag'])) {
 822             unset($params['removetag']);
 823         }
 824
 825         if (isset($params['searchtags'])) {
 826             $tags = explode(' ', $params['searchtags']);
 827             // Remove value from array $tags.
 828             $tags = array_diff($tags, array($_GET['removetag']));
 829             $params['searchtags'] = implode(' ', $tags);
 830
 831             if (empty($params['searchtags'])) {
 832                 unset($params['searchtags']);
 833             }
 834
 835             // We also remove page (keeping the same page has no sense, since
 836             // the results are different)
 837             unset($params['page']);
 838         }
 839         header('Location: ?'.http_build_query($params));
 840         exit;
 841     }
 842
 843     // -------- User wants to change the number of links per page (linksperpage=...)
 844     if (isset($_GET['linksperpage'])) {
 845         if (is_numeric($_GET['linksperpage'])) {
 846             $_SESSION['LINKS_PER_PAGE']=abs(intval($_GET['linksperpage']));
 847         }
 848
 849         if (! empty($_SERVER['HTTP_REFERER'])) {
 850             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('linksperpage'));
 851         } else {
 852             $location = '?';
 853         }
 854         header('Location: '. $location);
 855         exit;
 856     }
 857
 858     // -------- User wants to see only private links (toggle)
 859     if (isset($_GET['visibility'])) {
 860         if ($_GET['visibility'] === 'private') {
 861             // Visibility not set or not already private, set private, otherwise reset it
 862             if (empty($_SESSION['visibility']) || $_SESSION['visibility'] !== 'private') {
 863                 // See only private links
 864                 $_SESSION['visibility'] = 'private';
 865             } else {
 866                 unset($_SESSION['visibility']);
 867             }
 868         } elseif ($_GET['visibility'] === 'public') {
 869             if (empty($_SESSION['visibility']) || $_SESSION['visibility'] !== 'public') {
 870                 // See only public links
 871                 $_SESSION['visibility'] = 'public';
 872             } else {
 873                 unset($_SESSION['visibility']);
 874             }
 875         }
 876
 877         if (! empty($_SERVER['HTTP_REFERER'])) {
 878             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('visibility'));
 879         } else {
 880             $location = '?';
 881         }
 882         header('Location: '. $location);
 883         exit;
 884     }
 885
 886     // -------- User wants to see only untagged links (toggle)
 887     if (isset($_GET['untaggedonly'])) {
 888         $_SESSION['untaggedonly'] = empty($_SESSION['untaggedonly']);
 889
 890         if (! empty($_SERVER['HTTP_REFERER'])) {
 891             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('untaggedonly'));
 892         } else {
 893             $location = '?';
 894         }
 895         header('Location: '. $location);
 896         exit;
 897     }
 898
 899     // -------- Handle other actions allowed for non-logged in users:
 900     if (!$loginManager->isLoggedIn()) {
 901         // User tries to post new link but is not logged in:
 902         // Show login screen, then redirect to ?post=...
 903         if (isset($_GET['post'])) {
 904             header( // Redirect to login page, then back to post link.
 905                 'Location: ?do=login&post='.urlencode($_GET['post']).
 906                 (!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').
 907                 (!empty($_GET['description'])?'&description='.urlencode($_GET['description']):'').
 908                 (!empty($_GET['tags'])?'&tags='.urlencode($_GET['tags']):'').
 909                 (!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')
 910             );
 911             exit;
 912         }
 913
 914         showLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
 915         if (isset($_GET['edit_link'])) {
 916             header('Location: ?do=login&edit_link='. escape($_GET['edit_link']));
 917             exit;
 918         }
 919
 920         exit; // Never remove this one! All operations below are reserved for logged in user.
 921     }
 922
 923     // -------- All other functions are reserved for the registered user:
 924
 925     // -------- Display the Tools menu if requested (import/export/bookmarklet...)
 926     if ($targetPage == Router::$PAGE_TOOLS) {
 927         $data = [
 928             'pageabsaddr' => index_url($_SERVER),
 929             'sslenabled' => is_https($_SERVER),
 930         ];
 931         $pluginManager->executeHooks('render_tools', $data);
 932
 933         foreach ($data as $key => $value) {
 934             $PAGE->assign($key, $value);
 935         }
 936
 937         $PAGE->assign('pagetitle', t('Tools') .' - '. $conf->get('general.title', 'Shaarli'));
 938         $PAGE->renderPage('tools');
 939         exit;
 940     }
 941
 942     // -------- User wants to change his/her password.
 943     if ($targetPage == Router::$PAGE_CHANGEPASSWORD) {
 944         if ($conf->get('security.open_shaarli')) {
 945             die(t('You are not supposed to change a password on an Open Shaarli.'));
 946         }
 947
 948         if (!empty($_POST['setpassword']) && !empty($_POST['oldpassword'])) {
 949             if (!$sessionManager->checkToken($_POST['token'])) {
 950                 die(t('Wrong token.')); // Go away!
 951             }
 952
 953             // Make sure old password is correct.
 954             $oldhash = sha1(
 955                 $_POST['oldpassword'].$conf->get('credentials.login').$conf->get('credentials.salt')
 956             );
 957             if ($oldhash != $conf->get('credentials.hash')) {
 958                 echo '<script>alert("'
 959                     . t('The old password is not correct.')
 960                     .'");document.location=\'?do=changepasswd\';</script>';
 961                 exit;
 962             }
 963             // Save new password
 964             // Salt renders rainbow-tables attacks useless.
 965             $conf->set('credentials.salt', sha1(uniqid('', true) .'_'. mt_rand()));
 966             $conf->set(
 967                 'credentials.hash',
 968                 sha1(
 969                     $_POST['setpassword']
 970                     . $conf->get('credentials.login')
 971                     . $conf->get('credentials.salt')
 972                 )
 973             );
 974             try {
 975                 $conf->write($loginManager->isLoggedIn());
 976             } catch (Exception $e) {
 977                 error_log(
 978                     'ERROR while writing config file after changing password.' . PHP_EOL .
 979                     $e->getMessage()
 980                 );
 981
 982                 // TODO: do not handle exceptions/errors in JS.
 983                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=tools\';</script>';
 984                 exit;
 985             }
 986             echo '<script>alert("'. t('Your password has been changed') .'");document.location=\'?do=tools\';</script>';
 987             exit;
 988         } else {
 989             // show the change password form.
 990             $PAGE->assign('pagetitle', t('Change password') .' - '. $conf->get('general.title', 'Shaarli'));
 991             $PAGE->renderPage('changepassword');
 992             exit;
 993         }
 994     }
 995
 996     // -------- User wants to change configuration
 997     if ($targetPage == Router::$PAGE_CONFIGURE) {
 998         if (!empty($_POST['title'])) {
 999             if (!$sessionManager->checkToken($_POST['token'])) {
1000                 die(t('Wrong token.')); // Go away!
1001             }
1002             $tz = 'UTC';
1003             if (!empty($_POST['continent']) && !empty($_POST['city'])
1004                 && isTimeZoneValid($_POST['continent'], $_POST['city'])
1005             ) {
1006                 $tz = $_POST['continent'] . '/' . $_POST['city'];
1007             }
1008             $conf->set('general.timezone', $tz);
1009             $conf->set('general.title', escape($_POST['title']));
1010             $conf->set('general.header_link', escape($_POST['titleLink']));
1011             $conf->set('resource.theme', escape($_POST['theme']));
1012             $conf->set('security.session_protection_disabled', !empty($_POST['disablesessionprotection']));
1013             $conf->set('privacy.default_private_links', !empty($_POST['privateLinkByDefault']));
1014             $conf->set('feed.rss_permalinks', !empty($_POST['enableRssPermalinks']));
1015             $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1016             $conf->set('privacy.hide_public_links', !empty($_POST['hidePublicLinks']));
1017             $conf->set('api.enabled', !empty($_POST['enableApi']));
1018             $conf->set('api.secret', escape($_POST['apiSecret']));
1019             $conf->set('translation.language', escape($_POST['language']));
1020
1021             $thumbnailsMode = extension_loaded('gd') ? $_POST['enableThumbnails'] : Thumbnailer::MODE_NONE;
1022             if ($thumbnailsMode !== Thumbnailer::MODE_NONE
1023                 && $thumbnailsMode !== $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE)
1024             ) {
1025                 $_SESSION['warnings'][] = t(
1026                     'You have enabled or changed thumbnails mode. '
1027                     .'<a href="?do=thumbs_update">Please synchronize them</a>.'
1028                 );
1029             }
1030             $conf->set('thumbnails.mode', $thumbnailsMode);
1031
1032             try {
1033                 $conf->write($loginManager->isLoggedIn());
1034                 $history->updateSettings();
1035                 invalidateCaches($conf->get('resource.page_cache'));
1036             } catch (Exception $e) {
1037                 error_log(
1038                     'ERROR while writing config file after configuration update.' . PHP_EOL .
1039                     $e->getMessage()
1040                 );
1041
1042                 // TODO: do not handle exceptions/errors in JS.
1043                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=configure\';</script>';
1044                 exit;
1045             }
1046             echo '<script>alert("'. t('Configuration was saved.') .'");document.location=\'?do=configure\';</script>';
1047             exit;
1048         } else {
1049             // Show the configuration form.
1050             $PAGE->assign('title', $conf->get('general.title'));
1051             $PAGE->assign('theme', $conf->get('resource.theme'));
1052             $PAGE->assign('theme_available', ThemeUtils::getThemes($conf->get('resource.raintpl_tpl')));
1053             list($continents, $cities) = generateTimeZoneData(
1054                 timezone_identifiers_list(),
1055                 $conf->get('general.timezone')
1056             );
1057             $PAGE->assign('continents', $continents);
1058             $PAGE->assign('cities', $cities);
1059             $PAGE->assign('private_links_default', $conf->get('privacy.default_private_links', false));
1060             $PAGE->assign('session_protection_disabled', $conf->get('security.session_protection_disabled', false));
1061             $PAGE->assign('enable_rss_permalinks', $conf->get('feed.rss_permalinks', false));
1062             $PAGE->assign('enable_update_check', $conf->get('updates.check_updates', true));
1063             $PAGE->assign('hide_public_links', $conf->get('privacy.hide_public_links', false));
1064             $PAGE->assign('api_enabled', $conf->get('api.enabled', true));
1065             $PAGE->assign('api_secret', $conf->get('api.secret'));
1066             $PAGE->assign('languages', Languages::getAvailableLanguages());
1067             $PAGE->assign('gd_enabled', extension_loaded('gd'));
1068             $PAGE->assign('thumbnails_mode', $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE));
1069             $PAGE->assign('pagetitle', t('Configure') .' - '. $conf->get('general.title', 'Shaarli'));
1070             $PAGE->renderPage('configure');
1071             exit;
1072         }
1073     }
1074
1075     // -------- User wants to rename a tag or delete it
1076     if ($targetPage == Router::$PAGE_CHANGETAG) {
1077         if (empty($_POST['fromtag']) || (empty($_POST['totag']) && isset($_POST['renametag']))) {
1078             $PAGE->assign('fromtag', ! empty($_GET['fromtag']) ? escape($_GET['fromtag']) : '');
1079             $PAGE->assign('pagetitle', t('Manage tags') .' - '. $conf->get('general.title', 'Shaarli'));
1080             $PAGE->renderPage('changetag');
1081             exit;
1082         }
1083
1084         if (!$sessionManager->checkToken($_POST['token'])) {
1085             die(t('Wrong token.'));
1086         }
1087
1088         $toTag = isset($_POST['totag']) ? escape($_POST['totag']) : null;
1089         $alteredLinks = $LINKSDB->renameTag(escape($_POST['fromtag']), $toTag);
1090         $LINKSDB->save($conf->get('resource.page_cache'));
1091         foreach ($alteredLinks as $link) {
1092             $history->updateLink($link);
1093         }
1094         $delete = empty($_POST['totag']);
1095         $redirect = $delete ? 'do=changetag' : 'searchtags='. urlencode(escape($_POST['totag']));
1096         $count = count($alteredLinks);
1097         $alert = $delete
1098             ? sprintf(t('The tag was removed from %d link.', 'The tag was removed from %d links.', $count), $count)
1099             : sprintf(t('The tag was renamed in %d link.', 'The tag was renamed in %d links.', $count), $count);
1100         echo '<script>alert("'. $alert .'");document.location=\'?'. $redirect .'\';</script>';
1101         exit;
1102     }
1103
1104     // -------- User wants to add a link without using the bookmarklet: Show form.
1105     if ($targetPage == Router::$PAGE_ADDLINK) {
1106         $PAGE->assign('pagetitle', t('Shaare a new link') .' - '. $conf->get('general.title', 'Shaarli'));
1107         $PAGE->renderPage('addlink');
1108         exit;
1109     }
1110
1111     // -------- User clicked the "Save" button when editing a link: Save link to database.
1112     if (isset($_POST['save_edit'])) {
1113         // Go away!
1114         if (! $sessionManager->checkToken($_POST['token'])) {
1115             die(t('Wrong token.'));
1116         }
1117
1118         // lf_id should only be present if the link exists.
1119         $id = isset($_POST['lf_id']) ? intval(escape($_POST['lf_id'])) : $LINKSDB->getNextId();
1120         // Linkdate is kept here to:
1121         //   - use the same permalink for notes as they're displayed when creating them
1122         //   - let users hack creation date of their posts
1123         //     See: https://shaarli.readthedocs.io/en/master/guides/various-hacks/#changing-the-timestamp-for-a-shaare
1124         $linkdate = escape($_POST['lf_linkdate']);
1125         if (isset($LINKSDB[$id])) {
1126             // Edit
1127             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1128             $updated = new DateTime();
1129             $shortUrl = $LINKSDB[$id]['shorturl'];
1130             $new = false;
1131         } else {
1132             // New link
1133             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1134             $updated = null;
1135             $shortUrl = link_small_hash($created, $id);
1136             $new = true;
1137         }
1138
1139         // Remove multiple spaces.
1140         $tags = trim(preg_replace('/\s\s+/', ' ', $_POST['lf_tags']));
1141         // Remove first '-' char in tags.
1142         $tags = preg_replace('/(^| )\-/', '$1', $tags);
1143         // Remove duplicates.
1144         $tags = implode(' ', array_unique(explode(' ', $tags)));
1145
1146         if (empty(trim($_POST['lf_url']))) {
1147             $_POST['lf_url'] = '?' . smallHash($linkdate . $id);
1148         }
1149         $url = whitelist_protocols(trim($_POST['lf_url']), $conf->get('security.allowed_protocols'));
1150
1151         $link = array(
1152             'id' => $id,
1153             'title' => trim($_POST['lf_title']),
1154             'url' => $url,
1155             'description' => $_POST['lf_description'],
1156             'private' => (isset($_POST['lf_private']) ? 1 : 0),
1157             'created' => $created,
1158             'updated' => $updated,
1159             'tags' => str_replace(',', ' ', $tags),
1160             'shorturl' => $shortUrl,
1161         );
1162
1163         // If title is empty, use the URL as title.
1164         if ($link['title'] == '') {
1165             $link['title'] = $link['url'];
1166         }
1167
1168         if ($conf->get('thumbnails.mode', Thumbnailer::MODE_NONE) !== Thumbnailer::MODE_NONE
1169             && ! is_note($link['url'])
1170         ) {
1171             $thumbnailer = new Thumbnailer($conf);
1172             $link['thumbnail'] = $thumbnailer->get($url);
1173         }
1174
1175         $link['sticky'] = isset($link['sticky']) ? $link['sticky'] : false;
1176
1177         $pluginManager->executeHooks('save_link', $link);
1178
1179         $LINKSDB[$id] = $link;
1180         $LINKSDB->save($conf->get('resource.page_cache'));
1181         if ($new) {
1182             $history->addLink($link);
1183         } else {
1184             $history->updateLink($link);
1185         }
1186
1187         // If we are called from the bookmarklet, we must close the popup:
1188         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1189             echo '<script>self.close();</script>';
1190             exit;
1191         }
1192
1193         $returnurl = !empty($_POST['returnurl']) ? $_POST['returnurl'] : '?';
1194         $location = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1195         // Scroll to the link which has been edited.
1196         $location .= '#' . $link['shorturl'];
1197         // After saving the link, redirect to the page the user was on.
1198         header('Location: '. $location);
1199         exit;
1200     }
1201
1202     // -------- User clicked the "Cancel" button when editing a link.
1203     if (isset($_POST['cancel_edit'])) {
1204         $id = isset($_POST['lf_id']) ? (int) escape($_POST['lf_id']) : false;
1205         if (! isset($LINKSDB[$id])) {
1206             header('Location: ?');
1207         }
1208         // If we are called from the bookmarklet, we must close the popup:
1209         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1210             echo '<script>self.close();</script>';
1211             exit;
1212         }
1213         $link = $LINKSDB[$id];
1214         $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
1215         // Scroll to the link which has been edited.
1216         $returnurl .= '#'. $link['shorturl'];
1217         $returnurl = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1218         header('Location: '.$returnurl); // After canceling, redirect to the page the user was on.
1219         exit;
1220     }
1221
1222     // -------- User clicked the "Delete" button when editing a link: Delete link from database.
1223     if ($targetPage == Router::$PAGE_DELETELINK) {
1224         if (! $sessionManager->checkToken($_GET['token'])) {
1225             die(t('Wrong token.'));
1226         }
1227
1228         $ids = trim($_GET['lf_linkdate']);
1229         if (strpos($ids, ' ') !== false) {
1230             // multiple, space-separated ids provided
1231             $ids = array_values(array_filter(preg_split('/\s+/', escape($ids))));
1232         } else {
1233             // only a single id provided
1234             $ids = [$ids];
1235         }
1236         // assert at least one id is given
1237         if (!count($ids)) {
1238             die('no id provided');
1239         }
1240         foreach ($ids as $id) {
1241             $id = (int) escape($id);
1242             $link = $LINKSDB[$id];
1243             $pluginManager->executeHooks('delete_link', $link);
1244             $history->deleteLink($link);
1245             unset($LINKSDB[$id]);
1246         }
1247         $LINKSDB->save($conf->get('resource.page_cache')); // save to disk
1248
1249         // If we are called from the bookmarklet, we must close the popup:
1250         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1251             echo '<script>self.close();</script>';
1252             exit;
1253         }
1254
1255         $location = '?';
1256         if (isset($_SERVER['HTTP_REFERER'])) {
1257             // Don't redirect to where we were previously if it was a permalink or an edit_link, because it would 404.
1258             $location = generateLocation(
1259                 $_SERVER['HTTP_REFERER'],
1260                 $_SERVER['HTTP_HOST'],
1261                 ['delete_link', 'edit_link', $link['shorturl']]
1262             );
1263         }
1264
1265         header('Location: ' . $location); // After deleting the link, redirect to appropriate location
1266         exit;
1267     }
1268
1269     // -------- User clicked either "Set public" or "Set private" bulk operation
1270     if ($targetPage == Router::$PAGE_CHANGE_VISIBILITY) {
1271         if (! $sessionManager->checkToken($_GET['token'])) {
1272             die(t('Wrong token.'));
1273         }
1274
1275         $ids = trim($_GET['ids']);
1276         if (strpos($ids, ' ') !== false) {
1277             // multiple, space-separated ids provided
1278             $ids = array_values(array_filter(preg_split('/\s+/', escape($ids))));
1279         } else {
1280             // only a single id provided
1281             $ids = [$ids];
1282         }
1283
1284         // assert at least one id is given
1285         if (!count($ids)) {
1286             die('no id provided');
1287         }
1288         // assert that the visibility is valid
1289         if (!isset($_GET['newVisibility']) || !in_array($_GET['newVisibility'], ['public', 'private'])) {
1290             die('invalid visibility');
1291         } else {
1292             $private = $_GET['newVisibility'] === 'private';
1293         }
1294         foreach ($ids as $id) {
1295             $id = (int) escape($id);
1296             $link = $LINKSDB[$id];
1297             $link['private'] = $private;
1298             $pluginManager->executeHooks('save_link', $link);
1299             $LINKSDB[$id] = $link;
1300         }
1301         $LINKSDB->save($conf->get('resource.page_cache')); // save to disk
1302
1303         $location = '?';
1304         if (isset($_SERVER['HTTP_REFERER'])) {
1305             $location = generateLocation(
1306                 $_SERVER['HTTP_REFERER'],
1307                 $_SERVER['HTTP_HOST']
1308             );
1309         }
1310         header('Location: ' . $location); // After deleting the link, redirect to appropriate location
1311         exit;
1312     }
1313
1314     // -------- User clicked the "EDIT" button on a link: Display link edit form.
1315     if (isset($_GET['edit_link'])) {
1316         $id = (int) escape($_GET['edit_link']);
1317         $link = $LINKSDB[$id];  // Read database
1318         if (!$link) {
1319             header('Location: ?');
1320             exit;
1321         } // Link not found in database.
1322         $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1323         $data = array(
1324             'link' => $link,
1325             'link_is_new' => false,
1326             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1327             'tags' => $LINKSDB->linksCountPerTag(),
1328         );
1329         $pluginManager->executeHooks('render_editlink', $data);
1330
1331         foreach ($data as $key => $value) {
1332             $PAGE->assign($key, $value);
1333         }
1334
1335         $PAGE->assign('pagetitle', t('Edit') .' '. t('Shaare') .' - '. $conf->get('general.title', 'Shaarli'));
1336         $PAGE->renderPage('editlink');
1337         exit;
1338     }
1339
1340     // -------- User want to post a new link: Display link edit form.
1341     if (isset($_GET['post'])) {
1342         $url = cleanup_url($_GET['post']);
1343
1344         $link_is_new = false;
1345         // Check if URL is not already in database (in this case, we will edit the existing link)
1346         $link = $LINKSDB->getLinkFromUrl($url);
1347         if (! $link) {
1348             $link_is_new = true;
1349             $linkdate = strval(date(LinkDB::LINK_DATE_FORMAT));
1350             // Get title if it was provided in URL (by the bookmarklet).
1351             $title = empty($_GET['title']) ? '' : escape($_GET['title']);
1352             // Get description if it was provided in URL (by the bookmarklet). [Bronco added that]
1353             $description = empty($_GET['description']) ? '' : escape($_GET['description']);
1354             $tags = empty($_GET['tags']) ? '' : escape($_GET['tags']);
1355             $private = !empty($_GET['private']) && $_GET['private'] === "1" ? 1 : 0;
1356
1357             // If this is an HTTP(S) link, we try go get the page to extract
1358             // the title (otherwise we will to straight to the edit form.)
1359             if (empty($title) && strpos(get_url_scheme($url), 'http') !== false) {
1360                 // Short timeout to keep the application responsive
1361                 // The callback will fill $charset and $title with data from the downloaded page.
1362                 get_http_response(
1363                     $url,
1364                     $conf->get('general.download_timeout', 30),
1365                     $conf->get('general.download_max_size', 4194304),
1366                     get_curl_download_callback($charset, $title)
1367                 );
1368                 if (! empty($title) && strtolower($charset) != 'utf-8') {
1369                     $title = mb_convert_encoding($title, 'utf-8', $charset);
1370                 }
1371             }
1372
1373             if ($url == '') {
1374                 $url = '?' . smallHash($linkdate . $LINKSDB->getNextId());
1375                 $title = $conf->get('general.default_note_title', t('Note: '));
1376             }
1377             $url = escape($url);
1378             $title = escape($title);
1379
1380             $link = array(
1381                 'linkdate' => $linkdate,
1382                 'title' => $title,
1383                 'url' => $url,
1384                 'description' => $description,
1385                 'tags' => $tags,
1386                 'private' => $private,
1387             );
1388         } else {
1389             $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1390         }
1391
1392         $data = array(
1393             'link' => $link,
1394             'link_is_new' => $link_is_new,
1395             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1396             'source' => (isset($_GET['source']) ? $_GET['source'] : ''),
1397             'tags' => $LINKSDB->linksCountPerTag(),
1398             'default_private_links' => $conf->get('privacy.default_private_links', false),
1399         );
1400         $pluginManager->executeHooks('render_editlink', $data);
1401
1402         foreach ($data as $key => $value) {
1403             $PAGE->assign($key, $value);
1404         }
1405
1406         $PAGE->assign('pagetitle', t('Shaare') .' - '. $conf->get('general.title', 'Shaarli'));
1407         $PAGE->renderPage('editlink');
1408         exit;
1409     }
1410
1411     if ($targetPage == Router::$PAGE_PINLINK) {
1412         if (! isset($_GET['id']) || empty($LINKSDB[$_GET['id']])) {
1413             // FIXME! Use a proper error system.
1414             $msg = t('Invalid link ID provided');
1415             echo '<script>alert("'. $msg .'");document.location=\''. index_url($_SERVER) .'\';</script>';
1416             exit;
1417         }
1418         if (! $sessionManager->checkToken($_GET['token'])) {
1419             die('Wrong token.');
1420         }
1421
1422         $link = $LINKSDB[$_GET['id']];
1423         $link['sticky'] = ! $link['sticky'];
1424         $LINKSDB[(int) $_GET['id']] = $link;
1425         $LINKSDB->save($conf->get('resource.page_cache'));
1426         header('Location: '.index_url($_SERVER));
1427         exit;
1428     }
1429
1430     if ($targetPage == Router::$PAGE_EXPORT) {
1431         // Export links as a Netscape Bookmarks file
1432
1433         if (empty($_GET['selection'])) {
1434             $PAGE->assign('pagetitle', t('Export') .' - '. $conf->get('general.title', 'Shaarli'));
1435             $PAGE->renderPage('export');
1436             exit;
1437         }
1438
1439         // export as bookmarks_(all|private|public)_YYYYmmdd_HHMMSS.html
1440         $selection = $_GET['selection'];
1441         if (isset($_GET['prepend_note_url'])) {
1442             $prependNoteUrl = $_GET['prepend_note_url'];
1443         } else {
1444             $prependNoteUrl = false;
1445         }
1446
1447         try {
1448             $PAGE->assign(
1449                 'links',
1450                 NetscapeBookmarkUtils::filterAndFormat(
1451                     $LINKSDB,
1452                     $selection,
1453                     $prependNoteUrl,
1454                     index_url($_SERVER)
1455                 )
1456             );
1457         } catch (Exception $exc) {
1458             header('Content-Type: text/plain; charset=utf-8');
1459             echo $exc->getMessage();
1460             exit;
1461         }
1462         $now = new DateTime();
1463         header('Content-Type: text/html; charset=utf-8');
1464         header(
1465             'Content-disposition: attachment; filename=bookmarks_'
1466             .$selection.'_'.$now->format(LinkDB::LINK_DATE_FORMAT).'.html'
1467         );
1468         $PAGE->assign('date', $now->format(DateTime::RFC822));
1469         $PAGE->assign('eol', PHP_EOL);
1470         $PAGE->assign('selection', $selection);
1471         $PAGE->renderPage('export.bookmarks');
1472         exit;
1473     }
1474
1475     if ($targetPage == Router::$PAGE_IMPORT) {
1476         // Upload a Netscape bookmark dump to import its contents
1477
1478         if (! isset($_POST['token']) || ! isset($_FILES['filetoupload'])) {
1479             // Show import dialog
1480             $PAGE->assign(
1481                 'maxfilesize',
1482                 get_max_upload_size(
1483                     ini_get('post_max_size'),
1484                     ini_get('upload_max_filesize'),
1485                     false
1486                 )
1487             );
1488             $PAGE->assign(
1489                 'maxfilesizeHuman',
1490                 get_max_upload_size(
1491                     ini_get('post_max_size'),
1492                     ini_get('upload_max_filesize'),
1493                     true
1494                 )
1495             );
1496             $PAGE->assign('pagetitle', t('Import') .' - '. $conf->get('general.title', 'Shaarli'));
1497             $PAGE->renderPage('import');
1498             exit;
1499         }
1500
1501         // Import bookmarks from an uploaded file
1502         if (isset($_FILES['filetoupload']['size']) && $_FILES['filetoupload']['size'] == 0) {
1503             // The file is too big or some form field may be missing.
1504             $msg = sprintf(
1505                 t(
1506                     'The file you are trying to upload is probably bigger than what this webserver can accept'
1507                     .' (%s). Please upload in smaller chunks.'
1508                 ),
1509                 get_max_upload_size(ini_get('post_max_size'), ini_get('upload_max_filesize'))
1510             );
1511             echo '<script>alert("'. $msg .'");document.location=\'?do='.Router::$PAGE_IMPORT .'\';</script>';
1512             exit;
1513         }
1514         if (! $sessionManager->checkToken($_POST['token'])) {
1515             die('Wrong token.');
1516         }
1517         $status = NetscapeBookmarkUtils::import(
1518             $_POST,
1519             $_FILES,
1520             $LINKSDB,
1521             $conf,
1522             $history
1523         );
1524         echo '<script>alert("'.$status.'");document.location=\'?do='
1525              .Router::$PAGE_IMPORT .'\';</script>';
1526         exit;
1527     }
1528
1529     // Plugin administration page
1530     if ($targetPage == Router::$PAGE_PLUGINSADMIN) {
1531         $pluginMeta = $pluginManager->getPluginsMeta();
1532
1533         // Split plugins into 2 arrays: ordered enabled plugins and disabled.
1534         $enabledPlugins = array_filter($pluginMeta, function ($v) {
1535             return $v['order'] !== false;
1536         });
1537         // Load parameters.
1538         $enabledPlugins = load_plugin_parameter_values($enabledPlugins, $conf->get('plugins', array()));
1539         uasort(
1540             $enabledPlugins,
1541             function ($a, $b) {
1542                 return $a['order'] - $b['order'];
1543             }
1544         );
1545         $disabledPlugins = array_filter($pluginMeta, function ($v) {
1546             return $v['order'] === false;
1547         });
1548
1549         $PAGE->assign('enabledPlugins', $enabledPlugins);
1550         $PAGE->assign('disabledPlugins', $disabledPlugins);
1551         $PAGE->assign('pagetitle', t('Plugin administration') .' - '. $conf->get('general.title', 'Shaarli'));
1552         $PAGE->renderPage('pluginsadmin');
1553         exit;
1554     }
1555
1556     // Plugin administration form action
1557     if ($targetPage == Router::$PAGE_SAVE_PLUGINSADMIN) {
1558         try {
1559             if (isset($_POST['parameters_form'])) {
1560                 unset($_POST['parameters_form']);
1561                 foreach ($_POST as $param => $value) {
1562                     $conf->set('plugins.'. $param, escape($value));
1563                 }
1564             } else {
1565                 $conf->set('general.enabled_plugins', save_plugin_config($_POST));
1566             }
1567             $conf->write($loginManager->isLoggedIn());
1568             $history->updateSettings();
1569         } catch (Exception $e) {
1570             error_log(
1571                 'ERROR while saving plugin configuration:.' . PHP_EOL .
1572                 $e->getMessage()
1573             );
1574
1575             // TODO: do not handle exceptions/errors in JS.
1576             echo '<script>alert("'
1577                 . $e->getMessage()
1578                 .'");document.location=\'?do='
1579                 . Router::$PAGE_PLUGINSADMIN
1580                 .'\';</script>';
1581             exit;
1582         }
1583         header('Location: ?do='. Router::$PAGE_PLUGINSADMIN);
1584         exit;
1585     }
1586
1587     // Get a fresh token
1588     if ($targetPage == Router::$GET_TOKEN) {
1589         header('Content-Type:text/plain');
1590         echo $sessionManager->generateToken($conf);
1591         exit;
1592     }
1593
1594     // -------- Thumbnails Update
1595     if ($targetPage == Router::$PAGE_THUMBS_UPDATE) {
1596         $ids = [];
1597         foreach ($LINKSDB as $link) {
1598             // A note or not HTTP(S)
1599             if (is_note($link['url']) || ! startsWith(strtolower($link['url']), 'http')) {
1600                 continue;
1601             }
1602             $ids[] = $link['id'];
1603         }
1604         $PAGE->assign('ids', $ids);
1605         $PAGE->assign('pagetitle', t('Thumbnails update') .' - '. $conf->get('general.title', 'Shaarli'));
1606         $PAGE->renderPage('thumbnails');
1607         exit;
1608     }
1609
1610     // -------- Single Thumbnail Update
1611     if ($targetPage == Router::$AJAX_THUMB_UPDATE) {
1612         if (! isset($_POST['id']) || ! ctype_digit($_POST['id'])) {
1613             http_response_code(400);
1614             exit;
1615         }
1616         $id = (int) $_POST['id'];
1617         if (empty($LINKSDB[$id])) {
1618             http_response_code(404);
1619             exit;
1620         }
1621         $thumbnailer = new Thumbnailer($conf);
1622         $link = $LINKSDB[$id];
1623         $link['thumbnail'] = $thumbnailer->get($link['url']);
1624         $LINKSDB[$id] = $link;
1625         $LINKSDB->save($conf->get('resource.page_cache'));
1626
1627         echo json_encode($link);
1628         exit;
1629     }
1630
1631     // -------- Otherwise, simply display search form and links:
1632     showLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
1633     exit;
1634 }
1635
1636 /**
1637  * Template for the list of links (<div id="linklist">)
1638  * This function fills all the necessary fields in the $PAGE for the template 'linklist.html'
1639  *
1640  * @param pageBuilder   $PAGE          pageBuilder instance.
1641  * @param LinkDB        $LINKSDB       LinkDB instance.
1642  * @param ConfigManager $conf          Configuration Manager instance.
1643  * @param PluginManager $pluginManager Plugin Manager instance.
1644  * @param LoginManager  $loginManager  LoginManager instance
1645  */
1646 function buildLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager)
1647 {
1648     // Used in templates
1649     if (isset($_GET['searchtags'])) {
1650         if (! empty($_GET['searchtags'])) {
1651             $searchtags = escape(normalize_spaces($_GET['searchtags']));
1652         } else {
1653             $searchtags = false;
1654         }
1655     } else {
1656         $searchtags = '';
1657     }
1658     $searchterm = !empty($_GET['searchterm']) ? escape(normalize_spaces($_GET['searchterm'])) : '';
1659
1660     // Smallhash filter
1661     if (! empty($_SERVER['QUERY_STRING'])
1662         && preg_match('/^[a-zA-Z0-9-_@]{6}($|&|#)/', $_SERVER['QUERY_STRING'])) {
1663         try {
1664             $linksToDisplay = $LINKSDB->filterHash($_SERVER['QUERY_STRING']);
1665         } catch (LinkNotFoundException $e) {
1666             $PAGE->render404($e->getMessage());
1667             exit;
1668         }
1669     } else {
1670         // Filter links according search parameters.
1671         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
1672         $request = [
1673             'searchtags' => $searchtags,
1674             'searchterm' => $searchterm,
1675         ];
1676         $linksToDisplay = $LINKSDB->filterSearch($request, false, $visibility, !empty($_SESSION['untaggedonly']));
1677     }
1678
1679     // ---- Handle paging.
1680     $keys = array();
1681     foreach ($linksToDisplay as $key => $value) {
1682         $keys[] = $key;
1683     }
1684
1685     // Select articles according to paging.
1686     $pagecount = ceil(count($keys) / $_SESSION['LINKS_PER_PAGE']);
1687     $pagecount = $pagecount == 0 ? 1 : $pagecount;
1688     $page= empty($_GET['page']) ? 1 : intval($_GET['page']);
1689     $page = $page < 1 ? 1 : $page;
1690     $page = $page > $pagecount ? $pagecount : $page;
1691     // Start index.
1692     $i = ($page-1) * $_SESSION['LINKS_PER_PAGE'];
1693     $end = $i + $_SESSION['LINKS_PER_PAGE'];
1694
1695     $thumbnailsEnabled = $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE) !== Thumbnailer::MODE_NONE;
1696     if ($thumbnailsEnabled) {
1697         $thumbnailer = new Thumbnailer($conf);
1698     }
1699
1700     $linkDisp = array();
1701     while ($i<$end && $i<count($keys)) {
1702         $link = $linksToDisplay[$keys[$i]];
1703         $link['description'] = format_description($link['description']);
1704         $classLi =  ($i % 2) != 0 ? '' : 'publicLinkHightLight';
1705         $link['class'] = $link['private'] == 0 ? $classLi : 'private';
1706         $link['timestamp'] = $link['created']->getTimestamp();
1707         if (! empty($link['updated'])) {
1708             $link['updated_timestamp'] = $link['updated']->getTimestamp();
1709         } else {
1710             $link['updated_timestamp'] = '';
1711         }
1712         $taglist = preg_split('/\s+/', $link['tags'], -1, PREG_SPLIT_NO_EMPTY);
1713         uasort($taglist, 'strcasecmp');
1714         $link['taglist'] = $taglist;
1715
1716         // Logged in, thumbnails enabled, not a note,
1717         // and (never retrieved yet or no valid cache file)
1718         if ($loginManager->isLoggedIn() && $thumbnailsEnabled && $link['url'][0] != '?'
1719             && (! isset($link['thumbnail']) || ($link['thumbnail'] !== false && ! is_file($link['thumbnail'])))
1720         ) {
1721             $elem = $LINKSDB[$keys[$i]];
1722             $elem['thumbnail'] = $thumbnailer->get($link['url']);
1723             $LINKSDB[$keys[$i]] = $elem;
1724             $updateDB = true;
1725             $link['thumbnail'] = $elem['thumbnail'];
1726         }
1727
1728         // Check for both signs of a note: starting with ? and 7 chars long.
1729         if ($link['url'][0] === '?' && strlen($link['url']) === 7) {
1730             $link['url'] = index_url($_SERVER) . $link['url'];
1731         }
1732
1733         $linkDisp[$keys[$i]] = $link;
1734         $i++;
1735     }
1736
1737     // If we retrieved new thumbnails, we update the database.
1738     if (!empty($updateDB)) {
1739         $LINKSDB->save($conf->get('resource.page_cache'));
1740     }
1741
1742     // Compute paging navigation
1743     $searchtagsUrl = $searchtags === '' ? '' : '&searchtags=' . urlencode($searchtags);
1744     $searchtermUrl = empty($searchterm) ? '' : '&searchterm=' . urlencode($searchterm);
1745     $previous_page_url = '';
1746     if ($i != count($keys)) {
1747         $previous_page_url = '?page=' . ($page+1) . $searchtermUrl . $searchtagsUrl;
1748     }
1749     $next_page_url='';
1750     if ($page>1) {
1751         $next_page_url = '?page=' . ($page-1) . $searchtermUrl . $searchtagsUrl;
1752     }
1753
1754     // Fill all template fields.
1755     $data = array(
1756         'previous_page_url' => $previous_page_url,
1757         'next_page_url' => $next_page_url,
1758         'page_current' => $page,
1759         'page_max' => $pagecount,
1760         'result_count' => count($linksToDisplay),
1761         'search_term' => $searchterm,
1762         'search_tags' => $searchtags,
1763         'visibility' => ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '',
1764         'links' => $linkDisp,
1765     );
1766
1767     // If there is only a single link, we change on-the-fly the title of the page.
1768     if (count($linksToDisplay) == 1) {
1769         $data['pagetitle'] = $linksToDisplay[$keys[0]]['title'] .' - '. $conf->get('general.title');
1770     } elseif (! empty($searchterm) || ! empty($searchtags)) {
1771         $data['pagetitle'] = t('Search: ');
1772         $data['pagetitle'] .= ! empty($searchterm) ? $searchterm .' ' : '';
1773         $bracketWrap = function ($tag) {
1774             return '['. $tag .']';
1775         };
1776         $data['pagetitle'] .= ! empty($searchtags)
1777             ? implode(' ', array_map($bracketWrap, preg_split('/\s+/', $searchtags))).' '
1778             : '';
1779         $data['pagetitle'] .= '- '. $conf->get('general.title');
1780     }
1781
1782     $pluginManager->executeHooks('render_linklist', $data, array('loggedin' => $loginManager->isLoggedIn()));
1783
1784     foreach ($data as $key => $value) {
1785         $PAGE->assign($key, $value);
1786     }
1787
1788     return;
1789 }
1790
1791 /**
1792  * Installation
1793  * This function should NEVER be called if the file data/config.php exists.
1794  *
1795  * @param ConfigManager  $conf           Configuration Manager instance.
1796  * @param SessionManager $sessionManager SessionManager instance
1797  * @param LoginManager   $loginManager   LoginManager instance
1798  */
1799 function install($conf, $sessionManager, $loginManager)
1800 {
1801     // On free.fr host, make sure the /sessions directory exists, otherwise login will not work.
1802     if (endsWith($_SERVER['HTTP_HOST'], '.free.fr') && !is_dir($_SERVER['DOCUMENT_ROOT'].'/sessions')) {
1803         mkdir($_SERVER['DOCUMENT_ROOT'].'/sessions', 0705);
1804     }
1805
1806
1807     // This part makes sure sessions works correctly.
1808     // (Because on some hosts, session.save_path may not be set correctly,
1809     // or we may not have write access to it.)
1810     if (isset($_GET['test_session'])
1811         && ( !isset($_SESSION) || !isset($_SESSION['session_tested']) || $_SESSION['session_tested']!='Working')) {
1812         // Step 2: Check if data in session is correct.
1813         $msg = t(
1814             '<pre>Sessions do not seem to work correctly on your server.<br>'.
1815             'Make sure the variable "session.save_path" is set correctly in your PHP config, '.
1816             'and that you have write access to it.<br>'.
1817             'It currently points to %s.<br>'.
1818             'On some browsers, accessing your server via a hostname like \'localhost\' '.
1819             'or any custom hostname without a dot causes cookie storage to fail. '.
1820             'We recommend accessing your server via it\'s IP address or Fully Qualified Domain Name.<br>'
1821         );
1822         $msg = sprintf($msg, session_save_path());
1823         echo $msg;
1824         echo '<br><a href="?">'. t('Click to try again.') .'</a></pre>';
1825         die;
1826     }
1827     if (!isset($_SESSION['session_tested'])) {
1828         // Step 1 : Try to store data in session and reload page.
1829         $_SESSION['session_tested'] = 'Working';  // Try to set a variable in session.
1830         header('Location: '.index_url($_SERVER).'?test_session');  // Redirect to check stored data.
1831     }
1832     if (isset($_GET['test_session'])) {
1833         // Step 3: Sessions are OK. Remove test parameter from URL.
1834         header('Location: '.index_url($_SERVER));
1835     }
1836
1837
1838     if (!empty($_POST['setlogin']) && !empty($_POST['setpassword'])) {
1839         $tz = 'UTC';
1840         if (!empty($_POST['continent']) && !empty($_POST['city'])
1841             && isTimeZoneValid($_POST['continent'], $_POST['city'])
1842         ) {
1843             $tz = $_POST['continent'].'/'.$_POST['city'];
1844         }
1845         $conf->set('general.timezone', $tz);
1846         $login = $_POST['setlogin'];
1847         $conf->set('credentials.login', $login);
1848         $salt = sha1(uniqid('', true) .'_'. mt_rand());
1849         $conf->set('credentials.salt', $salt);
1850         $conf->set('credentials.hash', sha1($_POST['setpassword'] . $login . $salt));
1851         if (!empty($_POST['title'])) {
1852             $conf->set('general.title', escape($_POST['title']));
1853         } else {
1854             $conf->set('general.title', 'Shared links on '.escape(index_url($_SERVER)));
1855         }
1856         $conf->set('translation.language', escape($_POST['language']));
1857         $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1858         $conf->set('api.enabled', !empty($_POST['enableApi']));
1859         $conf->set(
1860             'api.secret',
1861             generate_api_secret(
1862                 $conf->get('credentials.login'),
1863                 $conf->get('credentials.salt')
1864             )
1865         );
1866         try {
1867             // Everything is ok, let's create config file.
1868             $conf->write($loginManager->isLoggedIn());
1869         } catch (Exception $e) {
1870             error_log(
1871                 'ERROR while writing config file after installation.' . PHP_EOL .
1872                     $e->getMessage()
1873             );
1874
1875             // TODO: do not handle exceptions/errors in JS.
1876             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?\';</script>';
1877             exit;
1878         }
1879         echo '<script>alert('
1880             .'"Shaarli is now configured. '
1881             .'Please enter your login/password and start shaaring your links!"'
1882             .');document.location=\'?do=login\';</script>';
1883         exit;
1884     }
1885
1886     $PAGE = new PageBuilder($conf, $_SESSION, null, $sessionManager->generateToken());
1887     list($continents, $cities) = generateTimeZoneData(timezone_identifiers_list(), date_default_timezone_get());
1888     $PAGE->assign('continents', $continents);
1889     $PAGE->assign('cities', $cities);
1890     $PAGE->assign('languages', Languages::getAvailableLanguages());
1891     $PAGE->renderPage('install');
1892     exit;
1893 }
1894
1895 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=dailyrss')) {
1896     showDailyRSS($conf, $loginManager);
1897     exit;
1898 }
1899
1900 if (!isset($_SESSION['LINKS_PER_PAGE'])) {
1901     $_SESSION['LINKS_PER_PAGE'] = $conf->get('general.links_per_page', 20);
1902 }
1903
1904 try {
1905     $history = new History($conf->get('resource.history'));
1906 } catch (Exception $e) {
1907     die($e->getMessage());
1908 }
1909
1910 $linkDb = new LinkDB(
1911     $conf->get('resource.datastore'),
1912     $loginManager->isLoggedIn(),
1913     $conf->get('privacy.hide_public_links')
1914 );
1915
1916 $container = new \Slim\Container();
1917 $container['conf'] = $conf;
1918 $container['plugins'] = $pluginManager;
1919 $container['history'] = $history;
1920 $app = new \Slim\App($container);
1921
1922 // REST API routes
1923 $app->group('/api/v1', function () {
1924     $this->get('/info', '\Shaarli\Api\Controllers\Info:getInfo')->setName('getInfo');
1925     $this->get('/links', '\Shaarli\Api\Controllers\Links:getLinks')->setName('getLinks');
1926     $this->get('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:getLink')->setName('getLink');
1927     $this->post('/links', '\Shaarli\Api\Controllers\Links:postLink')->setName('postLink');
1928     $this->put('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:putLink')->setName('putLink');
1929     $this->delete('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:deleteLink')->setName('deleteLink');
1930
1931     $this->get('/tags', '\Shaarli\Api\Controllers\Tags:getTags')->setName('getTags');
1932     $this->get('/tags/{tagName:[\w]+}', '\Shaarli\Api\Controllers\Tags:getTag')->setName('getTag');
1933     $this->put('/tags/{tagName:[\w]+}', '\Shaarli\Api\Controllers\Tags:putTag')->setName('putTag');
1934     $this->delete('/tags/{tagName:[\w]+}', '\Shaarli\Api\Controllers\Tags:deleteTag')->setName('deleteTag');
1935
1936     $this->get('/history', '\Shaarli\Api\Controllers\HistoryController:getHistory')->setName('getHistory');
1937 })->add('\Shaarli\Api\ApiMiddleware');
1938
1939 $response = $app->run(true);
1940
1941 // Hack to make Slim and Shaarli router work together:
1942 // If a Slim route isn't found and NOT API call, we call renderPage().
1943 if ($response->getStatusCode() == 404 && strpos($_SERVER['REQUEST_URI'], '/api/v1') === false) {
1944     // We use UTF-8 for proper international characters handling.
1945     header('Content-Type: text/html; charset=utf-8');
1946     renderPage($conf, $pluginManager, $linkDb, $history, $sessionManager, $loginManager);
1947 } else {
1948     $response = $response
1949         ->withHeader('Access-Control-Allow-Origin', '*')
1950         ->withHeader(
1951             'Access-Control-Allow-Headers',
1952             'X-Requested-With, Content-Type, Accept, Origin, Authorization'
1953         )
1954         ->withHeader('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE, OPTIONS');
1955     $app->respond($response);
1956 }