index.php

   1 <?php
   2 /**
   3  * Shaarli - The personal, minimalist, super-fast, database free, bookmarking service.
   4  *
   5  * Friendly fork by the Shaarli community:
   6  *  - https://github.com/shaarli/Shaarli
   7  *
   8  * Original project by sebsauvage.net:
   9  *  - http://sebsauvage.net/wiki/doku.php?id=php:shaarli
  10  *  - https://github.com/sebsauvage/Shaarli
  11  *
  12  * Licence: http://www.opensource.org/licenses/zlib-license.php
  13  *
  14  * Requires: PHP 5.5.x
  15  */
  16
  17 // Set 'UTC' as the default timezone if it is not defined in php.ini
  18 // See http://php.net/manual/en/datetime.configuration.php#ini.date.timezone
  19 if (date_default_timezone_get() == '') {
  20     date_default_timezone_set('UTC');
  21 }
  22
  23 /*
  24  * PHP configuration
  25  */
  26
  27 // http://server.com/x/shaarli --> /shaarli/
  28 define('WEB_PATH', substr($_SERVER['REQUEST_URI'], 0, 1+strrpos($_SERVER['REQUEST_URI'], '/', 0)));
  29
  30 // High execution time in case of problematic imports/exports.
  31 ini_set('max_input_time','60');
  32
  33 // Try to set max upload file size and read
  34 ini_set('memory_limit', '128M');
  35 ini_set('post_max_size', '16M');
  36 ini_set('upload_max_filesize', '16M');
  37
  38 // See all error except warnings
  39 error_reporting(E_ALL^E_WARNING);
  40 // See all errors (for debugging only)
  41 //error_reporting(-1);
  42
  43
  44 // 3rd-party libraries
  45 if (! file_exists(__DIR__ . '/vendor/autoload.php')) {
  46     header('Content-Type: text/plain; charset=utf-8');
  47     echo "Error: missing Composer configuration\n\n"
  48         ."If you installed Shaarli through Git or using the development branch,\n"
  49         ."please refer to the installation documentation to install PHP"
  50         ." dependencies using Composer:\n"
  51         ."- https://shaarli.readthedocs.io/en/master/Server-configuration/\n"
  52         ."- https://shaarli.readthedocs.io/en/master/Download-and-Installation/";
  53     exit;
  54 }
  55 require_once 'inc/rain.tpl.class.php';
  56 require_once __DIR__ . '/vendor/autoload.php';
  57
  58 // Shaarli library
  59 require_once 'application/ApplicationUtils.php';
  60 require_once 'application/Cache.php';
  61 require_once 'application/CachedPage.php';
  62 require_once 'application/config/ConfigPlugin.php';
  63 require_once 'application/FeedBuilder.php';
  64 require_once 'application/FileUtils.php';
  65 require_once 'application/History.php';
  66 require_once 'application/HttpUtils.php';
  67 require_once 'application/LinkDB.php';
  68 require_once 'application/LinkFilter.php';
  69 require_once 'application/LinkUtils.php';
  70 require_once 'application/NetscapeBookmarkUtils.php';
  71 require_once 'application/PageBuilder.php';
  72 require_once 'application/TimeZone.php';
  73 require_once 'application/Url.php';
  74 require_once 'application/Utils.php';
  75 require_once 'application/PluginManager.php';
  76 require_once 'application/Router.php';
  77 require_once 'application/Updater.php';
  78 use \Shaarli\Config\ConfigManager;
  79 use \Shaarli\Languages;
  80 use \Shaarli\Security\LoginManager;
  81 use \Shaarli\Security\SessionManager;
  82 use \Shaarli\ThemeUtils;
  83 use \Shaarli\Thumbnailer;
  84
  85 // Ensure the PHP version is supported
  86 try {
  87     ApplicationUtils::checkPHPVersion('5.5', PHP_VERSION);
  88 } catch(Exception $exc) {
  89     header('Content-Type: text/plain; charset=utf-8');
  90     echo $exc->getMessage();
  91     exit;
  92 }
  93
  94 define('SHAARLI_VERSION', ApplicationUtils::getVersion(__DIR__ .'/'. ApplicationUtils::$VERSION_FILE));
  95
  96 // Force cookie path (but do not change lifetime)
  97 $cookie = session_get_cookie_params();
  98 $cookiedir = '';
  99 if (dirname($_SERVER['SCRIPT_NAME']) != '/') {
 100     $cookiedir = dirname($_SERVER["SCRIPT_NAME"]).'/';
 101 }
 102 // Set default cookie expiration and path.
 103 session_set_cookie_params($cookie['lifetime'], $cookiedir, $_SERVER['SERVER_NAME']);
 104 // Set session parameters on server side.
 105 // Use cookies to store session.
 106 ini_set('session.use_cookies', 1);
 107 // Force cookies for session (phpsessionID forbidden in URL).
 108 ini_set('session.use_only_cookies', 1);
 109 // Prevent PHP form using sessionID in URL if cookies are disabled.
 110 ini_set('session.use_trans_sid', false);
 111
 112 session_name('shaarli');
 113 // Start session if needed (Some server auto-start sessions).
 114 if (session_id() == '') {
 115     session_start();
 116 }
 117
 118 // Regenerate session ID if invalid or not defined in cookie.
 119 if (isset($_COOKIE['shaarli']) && !SessionManager::checkId($_COOKIE['shaarli'])) {
 120     session_regenerate_id(true);
 121     $_COOKIE['shaarli'] = session_id();
 122 }
 123
 124 $conf = new ConfigManager();
 125 $sessionManager = new SessionManager($_SESSION, $conf);
 126 $loginManager = new LoginManager($GLOBALS, $conf, $sessionManager);
 127 $loginManager->generateStaySignedInToken($_SERVER['REMOTE_ADDR']);
 128 $clientIpId = client_ip_id($_SERVER);
 129
 130 // LC_MESSAGES isn't defined without php-intl, in this case use LC_COLLATE locale instead.
 131 if (! defined('LC_MESSAGES')) {
 132     define('LC_MESSAGES', LC_COLLATE);
 133 }
 134
 135 // Sniff browser language and set date format accordingly.
 136 if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
 137     autoLocale($_SERVER['HTTP_ACCEPT_LANGUAGE']);
 138 }
 139
 140 new Languages(setlocale(LC_MESSAGES, 0), $conf);
 141
 142 $conf->setEmpty('general.timezone', date_default_timezone_get());
 143 $conf->setEmpty('general.title', t('Shared links on '). escape(index_url($_SERVER)));
 144 RainTPL::$tpl_dir = $conf->get('resource.raintpl_tpl').'/'.$conf->get('resource.theme').'/'; // template directory
 145 RainTPL::$cache_dir = $conf->get('resource.raintpl_tmp'); // cache directory
 146
 147 $pluginManager = new PluginManager($conf);
 148 $pluginManager->load($conf->get('general.enabled_plugins'));
 149
 150 date_default_timezone_set($conf->get('general.timezone', 'UTC'));
 151
 152 ob_start();  // Output buffering for the page cache.
 153
 154 // Prevent caching on client side or proxy: (yes, it's ugly)
 155 header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
 156 header("Cache-Control: no-store, no-cache, must-revalidate");
 157 header("Cache-Control: post-check=0, pre-check=0", false);
 158 header("Pragma: no-cache");
 159
 160 if (! is_file($conf->getConfigFileExt())) {
 161     // Ensure Shaarli has proper access to its resources
 162     $errors = ApplicationUtils::checkResourcePermissions($conf);
 163
 164     if ($errors != array()) {
 165         $message = '<p>'. t('Insufficient permissions:') .'</p><ul>';
 166
 167         foreach ($errors as $error) {
 168             $message .= '<li>'.$error.'</li>';
 169         }
 170         $message .= '</ul>';
 171
 172         header('Content-Type: text/html; charset=utf-8');
 173         echo $message;
 174         exit;
 175     }
 176
 177     // Display the installation form if no existing config is found
 178     install($conf, $sessionManager, $loginManager);
 179 }
 180
 181 $loginManager->checkLoginState($_COOKIE, $clientIpId);
 182
 183 /**
 184  * Adapter function to ensure compatibility with third-party templates
 185  *
 186  * @see https://github.com/shaarli/Shaarli/pull/1086
 187  *
 188  * @return bool true when the user is logged in, false otherwise
 189  */
 190 function isLoggedIn()
 191 {
 192     global $loginManager;
 193     return $loginManager->isLoggedIn();
 194 }
 195
 196
 197 // ------------------------------------------------------------------------------------------
 198 // Process login form: Check if login/password is correct.
 199 if (isset($_POST['login'])) {
 200     if (! $loginManager->canLogin($_SERVER)) {
 201         die(t('I said: NO. You are banned for the moment. Go away.'));
 202     }
 203     if (isset($_POST['password'])
 204         && $sessionManager->checkToken($_POST['token'])
 205         && $loginManager->checkCredentials($_SERVER['REMOTE_ADDR'], $clientIpId, $_POST['login'], $_POST['password'])
 206     ) {
 207         $loginManager->handleSuccessfulLogin($_SERVER);
 208
 209         $cookiedir = '';
 210         if (dirname($_SERVER['SCRIPT_NAME']) != '/') {
 211             // Note: Never forget the trailing slash on the cookie path!
 212             $cookiedir = dirname($_SERVER["SCRIPT_NAME"]) . '/';
 213         }
 214
 215         if (!empty($_POST['longlastingsession'])) {
 216             // Keep the session cookie even after the browser closes
 217             $sessionManager->setStaySignedIn(true);
 218             $expirationTime = $sessionManager->extendSession();
 219
 220             setcookie(
 221                 $loginManager::$STAY_SIGNED_IN_COOKIE,
 222                 $loginManager->getStaySignedInToken(),
 223                 $expirationTime,
 224                 WEB_PATH
 225             );
 226
 227         } else {
 228             // Standard session expiration (=when browser closes)
 229             $expirationTime = 0;
 230         }
 231
 232         // Send cookie with the new expiration date to the browser
 233         session_set_cookie_params($expirationTime, $cookiedir, $_SERVER['SERVER_NAME']);
 234         session_regenerate_id(true);
 235
 236         // Optional redirect after login:
 237         if (isset($_GET['post'])) {
 238             $uri = '?post='. urlencode($_GET['post']);
 239             foreach (array('description', 'source', 'title', 'tags') as $param) {
 240                 if (!empty($_GET[$param])) {
 241                     $uri .= '&'.$param.'='.urlencode($_GET[$param]);
 242                 }
 243             }
 244             header('Location: '. $uri);
 245             exit;
 246         }
 247
 248         if (isset($_GET['edit_link'])) {
 249             header('Location: ?edit_link='. escape($_GET['edit_link']));
 250             exit;
 251         }
 252
 253         if (isset($_POST['returnurl'])) {
 254             // Prevent loops over login screen.
 255             if (strpos($_POST['returnurl'], 'do=login') === false) {
 256                 header('Location: '. generateLocation($_POST['returnurl'], $_SERVER['HTTP_HOST']));
 257                 exit;
 258             }
 259         }
 260         header('Location: ?'); exit;
 261     } else {
 262         $loginManager->handleFailedLogin($_SERVER);
 263         $redir = '&username='. urlencode($_POST['login']);
 264         if (isset($_GET['post'])) {
 265             $redir .= '&post=' . urlencode($_GET['post']);
 266             foreach (array('description', 'source', 'title', 'tags') as $param) {
 267                 if (!empty($_GET[$param])) {
 268                     $redir .= '&' . $param . '=' . urlencode($_GET[$param]);
 269                 }
 270             }
 271         }
 272         // Redirect to login screen.
 273         echo '<script>alert("'. t("Wrong login/password.") .'");document.location=\'?do=login'.$redir.'\';</script>';
 274         exit;
 275     }
 276 }
 277
 278 // ------------------------------------------------------------------------------------------
 279 // Token management for XSRF protection
 280 // Token should be used in any form which acts on data (create,update,delete,import...).
 281 if (!isset($_SESSION['tokens'])) $_SESSION['tokens']=array();  // Token are attached to the session.
 282
 283 /**
 284  * Daily RSS feed: 1 RSS entry per day giving all the links on that day.
 285  * Gives the last 7 days (which have links).
 286  * This RSS feed cannot be filtered.
 287  *
 288  * @param ConfigManager $conf         Configuration Manager instance
 289  * @param LoginManager  $loginManager LoginManager instance
 290  */
 291 function showDailyRSS($conf, $loginManager) {
 292     // Cache system
 293     $query = $_SERVER['QUERY_STRING'];
 294     $cache = new CachedPage(
 295         $conf->get('config.PAGE_CACHE'),
 296         page_url($_SERVER),
 297         startsWith($query,'do=dailyrss') && !$loginManager->isLoggedIn()
 298     );
 299     $cached = $cache->cachedVersion();
 300     if (!empty($cached)) {
 301         echo $cached;
 302         exit;
 303     }
 304
 305     // If cached was not found (or not usable), then read the database and build the response:
 306     // Read links from database (and filter private links if used it not logged in).
 307     $LINKSDB = new LinkDB(
 308         $conf->get('resource.datastore'),
 309         $loginManager->isLoggedIn(),
 310         $conf->get('privacy.hide_public_links'),
 311         $conf->get('redirector.url'),
 312         $conf->get('redirector.encode_url')
 313     );
 314
 315     /* Some Shaarlies may have very few links, so we need to look
 316        back in time until we have enough days ($nb_of_days).
 317     */
 318     $nb_of_days = 7; // We take 7 days.
 319     $today = date('Ymd');
 320     $days = array();
 321
 322     foreach ($LINKSDB as $link) {
 323         $day = $link['created']->format('Ymd'); // Extract day (without time)
 324         if (strcmp($day, $today) < 0) {
 325             if (empty($days[$day])) {
 326                 $days[$day] = array();
 327             }
 328             $days[$day][] = $link;
 329         }
 330
 331         if (count($days) > $nb_of_days) {
 332             break; // Have we collected enough days?
 333         }
 334     }
 335
 336     // Build the RSS feed.
 337     header('Content-Type: application/rss+xml; charset=utf-8');
 338     $pageaddr = escape(index_url($_SERVER));
 339     echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0">';
 340     echo '<channel>';
 341     echo '<title>Daily - '. $conf->get('general.title') . '</title>';
 342     echo '<link>'. $pageaddr .'</link>';
 343     echo '<description>Daily shared links</description>';
 344     echo '<language>en-en</language>';
 345     echo '<copyright>'. $pageaddr .'</copyright>'. PHP_EOL;
 346
 347     // For each day.
 348     foreach ($days as $day => $links) {
 349         $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 350         $absurl = escape(index_url($_SERVER).'?do=daily&day='.$day);  // Absolute URL of the corresponding "Daily" page.
 351
 352         // We pre-format some fields for proper output.
 353         foreach ($links as &$link) {
 354             $link['formatedDescription'] = format_description(
 355                 $link['description'],
 356                 $conf->get('redirector.url'),
 357                 $conf->get('redirector.encode_url')
 358             );
 359             $link['timestamp'] = $link['created']->getTimestamp();
 360             if (startsWith($link['url'], '?')) {
 361                 $link['url'] = index_url($_SERVER) . $link['url'];  // make permalink URL absolute
 362             }
 363         }
 364
 365         // Then build the HTML for this day:
 366         $tpl = new RainTPL;
 367         $tpl->assign('title', $conf->get('general.title'));
 368         $tpl->assign('daydate', $dayDate->getTimestamp());
 369         $tpl->assign('absurl', $absurl);
 370         $tpl->assign('links', $links);
 371         $tpl->assign('rssdate', escape($dayDate->format(DateTime::RSS)));
 372         $tpl->assign('hide_timestamps', $conf->get('privacy.hide_timestamps', false));
 373         $tpl->assign('index_url', $pageaddr);
 374         $html = $tpl->draw('dailyrss', true);
 375
 376         echo $html . PHP_EOL;
 377     }
 378     echo '</channel></rss><!-- Cached version of '. escape(page_url($_SERVER)) .' -->';
 379
 380     $cache->cache(ob_get_contents());
 381     ob_end_flush();
 382     exit;
 383 }
 384
 385 /**
 386  * Show the 'Daily' page.
 387  *
 388  * @param PageBuilder   $pageBuilder   Template engine wrapper.
 389  * @param LinkDB        $LINKSDB       LinkDB instance.
 390  * @param ConfigManager $conf          Configuration Manager instance.
 391  * @param PluginManager $pluginManager Plugin Manager instance.
 392  * @param LoginManager  $loginManager  Login Manager instance
 393  */
 394 function showDaily($pageBuilder, $LINKSDB, $conf, $pluginManager, $loginManager)
 395 {
 396     $day = date('Ymd', strtotime('-1 day')); // Yesterday, in format YYYYMMDD.
 397     if (isset($_GET['day'])) {
 398       $day = $_GET['day'];
 399     }
 400
 401     $days = $LINKSDB->days();
 402     $i = array_search($day, $days);
 403     if ($i === false && count($days)) {
 404         // no links for day, but at least one day with links
 405         $i = count($days) - 1;
 406         $day = $days[$i];
 407     }
 408     $previousday = '';
 409     $nextday = '';
 410
 411     if ($i !== false) {
 412         if ($i >= 1) {
 413              $previousday=$days[$i - 1];
 414         }
 415         if ($i < count($days) - 1) {
 416           $nextday = $days[$i + 1];
 417         }
 418     }
 419     try {
 420         $linksToDisplay = $LINKSDB->filterDay($day);
 421     } catch (Exception $exc) {
 422         error_log($exc);
 423         $linksToDisplay = array();
 424     }
 425
 426     // We pre-format some fields for proper output.
 427     foreach($linksToDisplay as $key => $link) {
 428         $taglist = explode(' ',$link['tags']);
 429         uasort($taglist, 'strcasecmp');
 430         $linksToDisplay[$key]['taglist']=$taglist;
 431         $linksToDisplay[$key]['formatedDescription'] = format_description(
 432             $link['description'],
 433             $conf->get('redirector.url'),
 434             $conf->get('redirector.encode_url')
 435         );
 436         $linksToDisplay[$key]['timestamp'] =  $link['created']->getTimestamp();
 437     }
 438
 439     $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 440     $data = array(
 441         'pagetitle' => $conf->get('general.title') .' - '. format_date($dayDate, false),
 442         'linksToDisplay' => $linksToDisplay,
 443         'day' => $dayDate->getTimestamp(),
 444         'dayDate' => $dayDate,
 445         'previousday' => $previousday,
 446         'nextday' => $nextday,
 447     );
 448
 449     /* Hook is called before column construction so that plugins don't have
 450        to deal with columns. */
 451     $pluginManager->executeHooks('render_daily', $data, array('loggedin' => $loginManager->isLoggedIn()));
 452
 453     /* We need to spread the articles on 3 columns.
 454        I did not want to use a JavaScript lib like http://masonry.desandro.com/
 455        so I manually spread entries with a simple method: I roughly evaluate the
 456        height of a div according to title and description length.
 457     */
 458     $columns = array(array(), array(), array()); // Entries to display, for each column.
 459     $fill = array(0, 0, 0);  // Rough estimate of columns fill.
 460     foreach($data['linksToDisplay'] as $key => $link) {
 461         // Roughly estimate length of entry (by counting characters)
 462         // Title: 30 chars = 1 line. 1 line is 30 pixels height.
 463         // Description: 836 characters gives roughly 342 pixel height.
 464         // This is not perfect, but it's usually OK.
 465         $length = strlen($link['title']) + (342 * strlen($link['description'])) / 836;
 466         if ($link['thumbnail']) {
 467           $length += 100; // 1 thumbnails roughly takes 100 pixels height.
 468         }
 469         // Then put in column which is the less filled:
 470         $smallest = min($fill); // find smallest value in array.
 471         $index = array_search($smallest, $fill); // find index of this smallest value.
 472         array_push($columns[$index], $link); // Put entry in this column.
 473         $fill[$index] += $length;
 474     }
 475
 476     $data['cols'] = $columns;
 477
 478     foreach ($data as $key => $value) {
 479         $pageBuilder->assign($key, $value);
 480     }
 481
 482     $pageBuilder->assign('pagetitle', t('Daily') .' - '. $conf->get('general.title', 'Shaarli'));
 483     $pageBuilder->renderPage('daily');
 484     exit;
 485 }
 486
 487 /**
 488  * Renders the linklist
 489  *
 490  * @param pageBuilder   $PAGE    pageBuilder instance.
 491  * @param LinkDB        $LINKSDB LinkDB instance.
 492  * @param ConfigManager $conf    Configuration Manager instance.
 493  * @param PluginManager $pluginManager Plugin Manager instance.
 494  */
 495 function showLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager) {
 496     buildLinkList($PAGE,$LINKSDB, $conf, $pluginManager, $loginManager);
 497     $PAGE->renderPage('linklist');
 498 }
 499
 500 /**
 501  * Render HTML page (according to URL parameters and user rights)
 502  *
 503  * @param ConfigManager  $conf           Configuration Manager instance.
 504  * @param PluginManager  $pluginManager  Plugin Manager instance,
 505  * @param LinkDB         $LINKSDB
 506  * @param History        $history        instance
 507  * @param SessionManager $sessionManager SessionManager instance
 508  * @param LoginManager   $loginManager   LoginManager instance
 509  */
 510 function renderPage($conf, $pluginManager, $LINKSDB, $history, $sessionManager, $loginManager)
 511 {
 512     $updater = new Updater(
 513         read_updates_file($conf->get('resource.updates')),
 514         $LINKSDB,
 515         $conf,
 516         $loginManager->isLoggedIn(),
 517         $_SESSION
 518     );
 519     try {
 520         $newUpdates = $updater->update();
 521         if (! empty($newUpdates)) {
 522             write_updates_file(
 523                 $conf->get('resource.updates'),
 524                 $updater->getDoneUpdates()
 525             );
 526         }
 527     }
 528     catch(Exception $e) {
 529         die($e->getMessage());
 530     }
 531
 532     $PAGE = new PageBuilder($conf, $_SESSION, $LINKSDB, $sessionManager->generateToken(), $loginManager->isLoggedIn());
 533     $PAGE->assign('linkcount', count($LINKSDB));
 534     $PAGE->assign('privateLinkcount', count_private($LINKSDB));
 535     $PAGE->assign('plugin_errors', $pluginManager->getErrors());
 536
 537     // Determine which page will be rendered.
 538     $query = (isset($_SERVER['QUERY_STRING'])) ? $_SERVER['QUERY_STRING'] : '';
 539     $targetPage = Router::findPage($query, $_GET, $loginManager->isLoggedIn());
 540
 541     if (
 542         // if the user isn't logged in
 543         !$loginManager->isLoggedIn() &&
 544         // and Shaarli doesn't have public content...
 545         $conf->get('privacy.hide_public_links') &&
 546         // and is configured to enforce the login
 547         $conf->get('privacy.force_login') &&
 548         // and the current page isn't already the login page
 549         $targetPage !== Router::$PAGE_LOGIN &&
 550         // and the user is not requesting a feed (which would lead to a different content-type as expected)
 551         $targetPage !== Router::$PAGE_FEED_ATOM &&
 552         $targetPage !== Router::$PAGE_FEED_RSS
 553     ) {
 554         // force current page to be the login page
 555         $targetPage = Router::$PAGE_LOGIN;
 556     }
 557
 558     // Call plugin hooks for header, footer and includes, specifying which page will be rendered.
 559     // Then assign generated data to RainTPL.
 560     $common_hooks = array(
 561         'includes',
 562         'header',
 563         'footer',
 564     );
 565
 566     foreach($common_hooks as $name) {
 567         $plugin_data = array();
 568         $pluginManager->executeHooks('render_' . $name, $plugin_data,
 569             array(
 570                 'target' => $targetPage,
 571                 'loggedin' => $loginManager->isLoggedIn()
 572             )
 573         );
 574         $PAGE->assign('plugins_' . $name, $plugin_data);
 575     }
 576
 577     // -------- Display login form.
 578     if ($targetPage == Router::$PAGE_LOGIN)
 579     {
 580         if ($conf->get('security.open_shaarli')) { header('Location: ?'); exit; }  // No need to login for open Shaarli
 581         if (isset($_GET['username'])) {
 582             $PAGE->assign('username', escape($_GET['username']));
 583         }
 584         $PAGE->assign('returnurl',(isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']):''));
 585         // add default state of the 'remember me' checkbox
 586         $PAGE->assign('remember_user_default', $conf->get('privacy.remember_user_default'));
 587         $PAGE->assign('user_can_login', $loginManager->canLogin($_SERVER));
 588         $PAGE->assign('pagetitle', t('Login') .' - '. $conf->get('general.title', 'Shaarli'));
 589         $PAGE->renderPage('loginform');
 590         exit;
 591     }
 592     // -------- User wants to logout.
 593     if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=logout'))
 594     {
 595         invalidateCaches($conf->get('resource.page_cache'));
 596         $sessionManager->logout();
 597         setcookie(LoginManager::$STAY_SIGNED_IN_COOKIE, 'false', 0, WEB_PATH);
 598         header('Location: ?');
 599         exit;
 600     }
 601
 602     // -------- Picture wall
 603     if ($targetPage == Router::$PAGE_PICWALL)
 604     {
 605         $PAGE->assign('pagetitle', t('Picture wall') .' - '. $conf->get('general.title', 'Shaarli'));
 606         if (! $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE) === Thumbnailer::MODE_NONE) {
 607             $PAGE->assign('linksToDisplay', []);
 608             $PAGE->renderPage('picwall');
 609             exit;
 610         }
 611
 612         // Optionally filter the results:
 613         $links = $LINKSDB->filterSearch($_GET);
 614         $linksToDisplay = array();
 615
 616         // Get only links which have a thumbnail.
 617         // Note: we do not retrieve thumbnails here, the request is too heavy.
 618         foreach($links as $key => $link)
 619         {
 620             if (isset($link['thumbnail']) && $link['thumbnail'] !== false) {
 621                 $linksToDisplay[] = $link; // Add to array.
 622             }
 623         }
 624
 625         $data = array(
 626             'linksToDisplay' => $linksToDisplay,
 627         );
 628         $pluginManager->executeHooks('render_picwall', $data, array('loggedin' => $loginManager->isLoggedIn()));
 629
 630         foreach ($data as $key => $value) {
 631             $PAGE->assign($key, $value);
 632         }
 633
 634
 635         $PAGE->renderPage('picwall');
 636         exit;
 637     }
 638
 639     // -------- Tag cloud
 640     if ($targetPage == Router::$PAGE_TAGCLOUD)
 641     {
 642         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
 643         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 644         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 645
 646         // We sort tags alphabetically, then choose a font size according to count.
 647         // First, find max value.
 648         $maxcount = 0;
 649         foreach ($tags as $value) {
 650             $maxcount = max($maxcount, $value);
 651         }
 652
 653         alphabetical_sort($tags, false, true);
 654
 655         $tagList = array();
 656         foreach($tags as $key => $value) {
 657             if (in_array($key, $filteringTags)) {
 658                 continue;
 659             }
 660             // Tag font size scaling:
 661             //   default 15 and 30 logarithm bases affect scaling,
 662             //   22 and 6 are arbitrary font sizes for max and min sizes.
 663             $size = log($value, 15) / log($maxcount, 30) * 2.2 + 0.8;
 664             $tagList[$key] = array(
 665                 'count' => $value,
 666                 'size' => number_format($size, 2, '.', ''),
 667             );
 668         }
 669
 670         $searchTags = implode(' ', escape($filteringTags));
 671         $data = array(
 672             'search_tags' => $searchTags,
 673             'tags' => $tagList,
 674         );
 675         $pluginManager->executeHooks('render_tagcloud', $data, array('loggedin' => $loginManager->isLoggedIn()));
 676
 677         foreach ($data as $key => $value) {
 678             $PAGE->assign($key, $value);
 679         }
 680
 681         $searchTags = ! empty($searchTags) ? $searchTags .' - ' : '';
 682         $PAGE->assign('pagetitle', $searchTags. t('Tag cloud') .' - '. $conf->get('general.title', 'Shaarli'));
 683         $PAGE->renderPage('tag.cloud');
 684         exit;
 685     }
 686
 687     // -------- Tag list
 688     if ($targetPage == Router::$PAGE_TAGLIST)
 689     {
 690         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
 691         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 692         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 693         foreach ($filteringTags as $tag) {
 694             if (array_key_exists($tag, $tags)) {
 695                 unset($tags[$tag]);
 696             }
 697         }
 698
 699         if (! empty($_GET['sort']) && $_GET['sort'] === 'alpha') {
 700             alphabetical_sort($tags, false, true);
 701         }
 702
 703         $searchTags = implode(' ', escape($filteringTags));
 704         $data = [
 705             'search_tags' => $searchTags,
 706             'tags' => $tags,
 707         ];
 708         $pluginManager->executeHooks('render_taglist', $data, ['loggedin' => $loginManager->isLoggedIn()]);
 709
 710         foreach ($data as $key => $value) {
 711             $PAGE->assign($key, $value);
 712         }
 713
 714         $searchTags = ! empty($searchTags) ? $searchTags .' - ' : '';
 715         $PAGE->assign('pagetitle', $searchTags . t('Tag list') .' - '. $conf->get('general.title', 'Shaarli'));
 716         $PAGE->renderPage('tag.list');
 717         exit;
 718     }
 719
 720     // Daily page.
 721     if ($targetPage == Router::$PAGE_DAILY) {
 722         showDaily($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
 723     }
 724
 725     // ATOM and RSS feed.
 726     if ($targetPage == Router::$PAGE_FEED_ATOM || $targetPage == Router::$PAGE_FEED_RSS) {
 727         $feedType = $targetPage == Router::$PAGE_FEED_RSS ? FeedBuilder::$FEED_RSS : FeedBuilder::$FEED_ATOM;
 728         header('Content-Type: application/'. $feedType .'+xml; charset=utf-8');
 729
 730         // Cache system
 731         $query = $_SERVER['QUERY_STRING'];
 732         $cache = new CachedPage(
 733             $conf->get('resource.page_cache'),
 734             page_url($_SERVER),
 735             startsWith($query,'do='. $targetPage) && !$loginManager->isLoggedIn()
 736         );
 737         $cached = $cache->cachedVersion();
 738         if (!empty($cached)) {
 739             echo $cached;
 740             exit;
 741         }
 742
 743         // Generate data.
 744         $feedGenerator = new FeedBuilder($LINKSDB, $feedType, $_SERVER, $_GET, $loginManager->isLoggedIn());
 745         $feedGenerator->setLocale(strtolower(setlocale(LC_COLLATE, 0)));
 746         $feedGenerator->setHideDates($conf->get('privacy.hide_timestamps') && !$loginManager->isLoggedIn());
 747         $feedGenerator->setUsePermalinks(isset($_GET['permalinks']) || !$conf->get('feed.rss_permalinks'));
 748         $data = $feedGenerator->buildData();
 749
 750         // Process plugin hook.
 751         $pluginManager->executeHooks('render_feed', $data, array(
 752             'loggedin' => $loginManager->isLoggedIn(),
 753             'target' => $targetPage,
 754         ));
 755
 756         // Render the template.
 757         $PAGE->assignAll($data);
 758         $PAGE->renderPage('feed.'. $feedType);
 759         $cache->cache(ob_get_contents());
 760         ob_end_flush();
 761         exit;
 762     }
 763
 764     // Display opensearch plugin (XML)
 765     if ($targetPage == Router::$PAGE_OPENSEARCH) {
 766         header('Content-Type: application/xml; charset=utf-8');
 767         $PAGE->assign('serverurl', index_url($_SERVER));
 768         $PAGE->renderPage('opensearch');
 769         exit;
 770     }
 771
 772     // -------- User clicks on a tag in a link: The tag is added to the list of searched tags (searchtags=...)
 773     if (isset($_GET['addtag']))
 774     {
 775         // Get previous URL (http_referer) and add the tag to the searchtags parameters in query.
 776         if (empty($_SERVER['HTTP_REFERER'])) { header('Location: ?searchtags='.urlencode($_GET['addtag'])); exit; } // In case browser does not send HTTP_REFERER
 777         parse_str(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_QUERY), $params);
 778
 779         // Prevent redirection loop
 780         if (isset($params['addtag'])) {
 781             unset($params['addtag']);
 782         }
 783
 784         // Check if this tag is already in the search query and ignore it if it is.
 785         // Each tag is always separated by a space
 786         if (isset($params['searchtags'])) {
 787             $current_tags = explode(' ', $params['searchtags']);
 788         } else {
 789             $current_tags = array();
 790         }
 791         $addtag = true;
 792         foreach ($current_tags as $value) {
 793             if ($value === $_GET['addtag']) {
 794                 $addtag = false;
 795                 break;
 796             }
 797         }
 798         // Append the tag if necessary
 799         if (empty($params['searchtags'])) {
 800             $params['searchtags'] = trim($_GET['addtag']);
 801         }
 802         elseif ($addtag) {
 803             $params['searchtags'] = trim($params['searchtags']).' '.trim($_GET['addtag']);
 804         }
 805
 806         unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
 807         header('Location: ?'.http_build_query($params));
 808         exit;
 809     }
 810
 811     // -------- User clicks on a tag in result count: Remove the tag from the list of searched tags (searchtags=...)
 812     if (isset($_GET['removetag'])) {
 813         // Get previous URL (http_referer) and remove the tag from the searchtags parameters in query.
 814         if (empty($_SERVER['HTTP_REFERER'])) {
 815             header('Location: ?');
 816             exit;
 817         }
 818
 819         // In case browser does not send HTTP_REFERER
 820         parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $params);
 821
 822         // Prevent redirection loop
 823         if (isset($params['removetag'])) {
 824             unset($params['removetag']);
 825         }
 826
 827         if (isset($params['searchtags'])) {
 828             $tags = explode(' ', $params['searchtags']);
 829             // Remove value from array $tags.
 830             $tags = array_diff($tags, array($_GET['removetag']));
 831             $params['searchtags'] = implode(' ',$tags);
 832
 833             if (empty($params['searchtags'])) {
 834                 unset($params['searchtags']);
 835             }
 836
 837             unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
 838         }
 839         header('Location: ?'.http_build_query($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     {
 902         // User tries to post new link but is not logged in:
 903         // Show login screen, then redirect to ?post=...
 904         if (isset($_GET['post']))
 905         {
 906             header( // Redirect to login page, then back to post link.
 907                 'Location: ?do=login&post='.urlencode($_GET['post']).
 908                 (!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').
 909                 (!empty($_GET['description'])?'&description='.urlencode($_GET['description']):'').
 910                 (!empty($_GET['tags'])?'&tags='.urlencode($_GET['tags']):'').
 911                 (!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')
 912             );
 913             exit;
 914         }
 915
 916         showLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
 917         if (isset($_GET['edit_link'])) {
 918             header('Location: ?do=login&edit_link='. escape($_GET['edit_link']));
 919             exit;
 920         }
 921
 922         exit; // Never remove this one! All operations below are reserved for logged in user.
 923     }
 924
 925     // -------- All other functions are reserved for the registered user:
 926
 927     // -------- Display the Tools menu if requested (import/export/bookmarklet...)
 928     if ($targetPage == Router::$PAGE_TOOLS)
 929     {
 930         $data = [
 931             'pageabsaddr' => index_url($_SERVER),
 932             'sslenabled' => is_https($_SERVER),
 933         ];
 934         $pluginManager->executeHooks('render_tools', $data);
 935
 936         foreach ($data as $key => $value) {
 937             $PAGE->assign($key, $value);
 938         }
 939
 940         $PAGE->assign('pagetitle', t('Tools') .' - '. $conf->get('general.title', 'Shaarli'));
 941         $PAGE->renderPage('tools');
 942         exit;
 943     }
 944
 945     // -------- User wants to change his/her password.
 946     if ($targetPage == Router::$PAGE_CHANGEPASSWORD)
 947     {
 948         if ($conf->get('security.open_shaarli')) {
 949             die(t('You are not supposed to change a password on an Open Shaarli.'));
 950         }
 951
 952         if (!empty($_POST['setpassword']) && !empty($_POST['oldpassword']))
 953         {
 954             if (!$sessionManager->checkToken($_POST['token'])) die(t('Wrong token.')); // Go away!
 955
 956             // Make sure old password is correct.
 957             $oldhash = sha1($_POST['oldpassword'].$conf->get('credentials.login').$conf->get('credentials.salt'));
 958             if ($oldhash!= $conf->get('credentials.hash')) {
 959                 echo '<script>alert("'. t('The old password is not correct.') .'");document.location=\'?do=changepasswd\';</script>';
 960                 exit;
 961             }
 962             // Save new password
 963             // Salt renders rainbow-tables attacks useless.
 964             $conf->set('credentials.salt', sha1(uniqid('', true) .'_'. mt_rand()));
 965             $conf->set('credentials.hash', sha1($_POST['setpassword'] . $conf->get('credentials.login') . $conf->get('credentials.salt')));
 966             try {
 967                 $conf->write($loginManager->isLoggedIn());
 968             }
 969             catch(Exception $e) {
 970                 error_log(
 971                     'ERROR while writing config file after changing password.' . PHP_EOL .
 972                     $e->getMessage()
 973                 );
 974
 975                 // TODO: do not handle exceptions/errors in JS.
 976                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=tools\';</script>';
 977                 exit;
 978             }
 979             echo '<script>alert("'. t('Your password has been changed') .'");document.location=\'?do=tools\';</script>';
 980             exit;
 981         }
 982         else // show the change password form.
 983         {
 984             $PAGE->assign('pagetitle', t('Change password') .' - '. $conf->get('general.title', 'Shaarli'));
 985             $PAGE->renderPage('changepassword');
 986             exit;
 987         }
 988     }
 989
 990     // -------- User wants to change configuration
 991     if ($targetPage == Router::$PAGE_CONFIGURE)
 992     {
 993         if (!empty($_POST['title']) )
 994         {
 995             if (!$sessionManager->checkToken($_POST['token'])) {
 996                 die(t('Wrong token.')); // Go away!
 997             }
 998             $tz = 'UTC';
 999             if (!empty($_POST['continent']) && !empty($_POST['city'])
1000                 && isTimeZoneValid($_POST['continent'], $_POST['city'])
1001             ) {
1002                 $tz = $_POST['continent'] . '/' . $_POST['city'];
1003             }
1004             $conf->set('general.timezone', $tz);
1005             $conf->set('general.title', escape($_POST['title']));
1006             $conf->set('general.header_link', escape($_POST['titleLink']));
1007             $conf->set('resource.theme', escape($_POST['theme']));
1008             $conf->set('security.session_protection_disabled', !empty($_POST['disablesessionprotection']));
1009             $conf->set('privacy.default_private_links', !empty($_POST['privateLinkByDefault']));
1010             $conf->set('feed.rss_permalinks', !empty($_POST['enableRssPermalinks']));
1011             $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1012             $conf->set('privacy.hide_public_links', !empty($_POST['hidePublicLinks']));
1013             $conf->set('api.enabled', !empty($_POST['enableApi']));
1014             $conf->set('api.secret', escape($_POST['apiSecret']));
1015             $conf->set('translation.language', escape($_POST['language']));
1016
1017             $thumbnailsMode = extension_loaded('gd') ? $_POST['enableThumbnails'] : Thumbnailer::MODE_NONE;
1018             if ($thumbnailsMode !== Thumbnailer::MODE_NONE
1019                 && $thumbnailsMode !== $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE)
1020             ) {
1021                 $_SESSION['warnings'][] = t(
1022                     'You have enabled or changed thumbnails mode. <a href="?do=thumbs_update">Please synchronize them</a>.'
1023                 );
1024             }
1025             $conf->set('thumbnails.mode', $thumbnailsMode);
1026
1027             try {
1028                 $conf->write($loginManager->isLoggedIn());
1029                 $history->updateSettings();
1030                 invalidateCaches($conf->get('resource.page_cache'));
1031             }
1032             catch(Exception $e) {
1033                 error_log(
1034                     'ERROR while writing config file after configuration update.' . PHP_EOL .
1035                     $e->getMessage()
1036                 );
1037
1038                 // TODO: do not handle exceptions/errors in JS.
1039                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=configure\';</script>';
1040                 exit;
1041             }
1042             echo '<script>alert("'. t('Configuration was saved.') .'");document.location=\'?do=configure\';</script>';
1043             exit;
1044         }
1045         else // Show the configuration form.
1046         {
1047             $PAGE->assign('title', $conf->get('general.title'));
1048             $PAGE->assign('theme', $conf->get('resource.theme'));
1049             $PAGE->assign('theme_available', ThemeUtils::getThemes($conf->get('resource.raintpl_tpl')));
1050             list($continents, $cities) = generateTimeZoneData(
1051                 timezone_identifiers_list(),
1052                 $conf->get('general.timezone')
1053             );
1054             $PAGE->assign('continents', $continents);
1055             $PAGE->assign('cities', $cities);
1056             $PAGE->assign('private_links_default', $conf->get('privacy.default_private_links', false));
1057             $PAGE->assign('session_protection_disabled', $conf->get('security.session_protection_disabled', false));
1058             $PAGE->assign('enable_rss_permalinks', $conf->get('feed.rss_permalinks', false));
1059             $PAGE->assign('enable_update_check', $conf->get('updates.check_updates', true));
1060             $PAGE->assign('hide_public_links', $conf->get('privacy.hide_public_links', false));
1061             $PAGE->assign('api_enabled', $conf->get('api.enabled', true));
1062             $PAGE->assign('api_secret', $conf->get('api.secret'));
1063             $PAGE->assign('languages', Languages::getAvailableLanguages());
1064             $PAGE->assign('language', $conf->get('translation.language'));
1065             $PAGE->assign('gd_enabled', extension_loaded('gd'));
1066             $PAGE->assign('thumbnails_mode', $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE));
1067             $PAGE->assign('pagetitle', t('Configure') .' - '. $conf->get('general.title', 'Shaarli'));
1068             $PAGE->renderPage('configure');
1069             exit;
1070         }
1071     }
1072
1073     // -------- User wants to rename a tag or delete it
1074     if ($targetPage == Router::$PAGE_CHANGETAG)
1075     {
1076         if (empty($_POST['fromtag']) || (empty($_POST['totag']) && isset($_POST['renametag']))) {
1077             $PAGE->assign('fromtag', ! empty($_GET['fromtag']) ? escape($_GET['fromtag']) : '');
1078             $PAGE->assign('pagetitle', t('Manage tags') .' - '. $conf->get('general.title', 'Shaarli'));
1079             $PAGE->renderPage('changetag');
1080             exit;
1081         }
1082
1083         if (!$sessionManager->checkToken($_POST['token'])) {
1084             die(t('Wrong token.'));
1085         }
1086
1087         $alteredLinks = $LINKSDB->renameTag(escape($_POST['fromtag']), escape($_POST['totag']));
1088         $LINKSDB->save($conf->get('resource.page_cache'));
1089         foreach ($alteredLinks as $link) {
1090             $history->updateLink($link);
1091         }
1092         $delete = empty($_POST['totag']);
1093         $redirect = $delete ? 'do=changetag' : 'searchtags='. urlencode(escape($_POST['totag']));
1094         $count = count($alteredLinks);
1095         $alert = $delete
1096             ? sprintf(t('The tag was removed from %d link.', 'The tag was removed from %d links.', $count), $count)
1097             : sprintf(t('The tag was renamed in %d link.', 'The tag was renamed in %d links.', $count), $count);
1098         echo '<script>alert("'. $alert .'");document.location=\'?'. $redirect .'\';</script>';
1099         exit;
1100     }
1101
1102     // -------- User wants to add a link without using the bookmarklet: Show form.
1103     if ($targetPage == Router::$PAGE_ADDLINK)
1104     {
1105         $PAGE->assign('pagetitle', t('Shaare a new link') .' - '. $conf->get('general.title', 'Shaarli'));
1106         $PAGE->renderPage('addlink');
1107         exit;
1108     }
1109
1110     // -------- User clicked the "Save" button when editing a link: Save link to database.
1111     if (isset($_POST['save_edit']))
1112     {
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             $thumbnailer = new Thumbnailer($conf);
1170             $link['thumbnail'] = $thumbnailer->get($url);
1171         }
1172
1173         $pluginManager->executeHooks('save_link', $link);
1174
1175         $LINKSDB[$id] = $link;
1176         $LINKSDB->save($conf->get('resource.page_cache'));
1177         if ($new) {
1178             $history->addLink($link);
1179         } else {
1180             $history->updateLink($link);
1181         }
1182
1183         // If we are called from the bookmarklet, we must close the popup:
1184         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1185             echo '<script>self.close();</script>';
1186             exit;
1187         }
1188
1189         $returnurl = !empty($_POST['returnurl']) ? $_POST['returnurl'] : '?';
1190         $location = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1191         // Scroll to the link which has been edited.
1192         $location .= '#' . $link['shorturl'];
1193         // After saving the link, redirect to the page the user was on.
1194         header('Location: '. $location);
1195         exit;
1196     }
1197
1198     // -------- User clicked the "Cancel" button when editing a link.
1199     if (isset($_POST['cancel_edit']))
1200     {
1201         $id = isset($_POST['lf_id']) ? (int) escape($_POST['lf_id']) : false;
1202         if (! isset($LINKSDB[$id])) {
1203             header('Location: ?');
1204         }
1205         // If we are called from the bookmarklet, we must close the popup:
1206         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1207         $link = $LINKSDB[$id];
1208         $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
1209         // Scroll to the link which has been edited.
1210         $returnurl .= '#'. $link['shorturl'];
1211         $returnurl = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1212         header('Location: '.$returnurl); // After canceling, redirect to the page the user was on.
1213         exit;
1214     }
1215
1216     // -------- User clicked the "Delete" button when editing a link: Delete link from database.
1217     if ($targetPage == Router::$PAGE_DELETELINK)
1218     {
1219         if (! $sessionManager->checkToken($_GET['token'])) {
1220             die(t('Wrong token.'));
1221         }
1222
1223         $ids = trim($_GET['lf_linkdate']);
1224         if (strpos($ids, ' ') !== false) {
1225             // multiple, space-separated ids provided
1226             $ids = array_values(array_filter(preg_split('/\s+/', escape($ids))));
1227         } else {
1228             // only a single id provided
1229             $ids = [$ids];
1230         }
1231         // assert at least one id is given
1232         if(!count($ids)){
1233             die('no id provided');
1234         }
1235         foreach ($ids as $id) {
1236             $id = (int) escape($id);
1237             $link = $LINKSDB[$id];
1238             $pluginManager->executeHooks('delete_link', $link);
1239             unset($LINKSDB[$id]);
1240         }
1241         $LINKSDB->save($conf->get('resource.page_cache')); // save to disk
1242         $history->deleteLink($link);
1243
1244         // If we are called from the bookmarklet, we must close the popup:
1245         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1246
1247         $location = '?';
1248         if (isset($_SERVER['HTTP_REFERER'])) {
1249             // Don't redirect to where we were previously if it was a permalink or an edit_link, because it would 404.
1250             $location = generateLocation(
1251                     $_SERVER['HTTP_REFERER'],
1252                     $_SERVER['HTTP_HOST'],
1253                     ['delete_link', 'edit_link', $link['shorturl']]
1254             );
1255         }
1256
1257         header('Location: ' . $location); // After deleting the link, redirect to appropriate location
1258         exit;
1259     }
1260
1261     // -------- User clicked the "EDIT" button on a link: Display link edit form.
1262     if (isset($_GET['edit_link']))
1263     {
1264         $id = (int) escape($_GET['edit_link']);
1265         $link = $LINKSDB[$id];  // Read database
1266         if (!$link) { header('Location: ?'); exit; } // Link not found in database.
1267         $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1268         $data = array(
1269             'link' => $link,
1270             'link_is_new' => false,
1271             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1272             'tags' => $LINKSDB->linksCountPerTag(),
1273         );
1274         $pluginManager->executeHooks('render_editlink', $data);
1275
1276         foreach ($data as $key => $value) {
1277             $PAGE->assign($key, $value);
1278         }
1279
1280         $PAGE->assign('pagetitle', t('Edit') .' '. t('Shaare') .' - '. $conf->get('general.title', 'Shaarli'));
1281         $PAGE->renderPage('editlink');
1282         exit;
1283     }
1284
1285     // -------- User want to post a new link: Display link edit form.
1286     if (isset($_GET['post'])) {
1287         $url = cleanup_url($_GET['post']);
1288
1289         $link_is_new = false;
1290         // Check if URL is not already in database (in this case, we will edit the existing link)
1291         $link = $LINKSDB->getLinkFromUrl($url);
1292         if (! $link)
1293         {
1294             $link_is_new = true;
1295             $linkdate = strval(date(LinkDB::LINK_DATE_FORMAT));
1296             // Get title if it was provided in URL (by the bookmarklet).
1297             $title = empty($_GET['title']) ? '' : escape($_GET['title']);
1298             // Get description if it was provided in URL (by the bookmarklet). [Bronco added that]
1299             $description = empty($_GET['description']) ? '' : escape($_GET['description']);
1300             $tags = empty($_GET['tags']) ? '' : escape($_GET['tags']);
1301             $private = !empty($_GET['private']) && $_GET['private'] === "1" ? 1 : 0;
1302             // If this is an HTTP(S) link, we try go get the page to extract the title (otherwise we will to straight to the edit form.)
1303             if (empty($title) && strpos(get_url_scheme($url), 'http') !== false) {
1304                 // Short timeout to keep the application responsive
1305                 // The callback will fill $charset and $title with data from the downloaded page.
1306                 get_http_response(
1307                     $url,
1308                     $conf->get('general.download_timeout', 30),
1309                     $conf->get('general.download_max_size', 4194304),
1310                     get_curl_download_callback($charset, $title)
1311                 );
1312                 if (! empty($title) && strtolower($charset) != 'utf-8') {
1313                     $title = mb_convert_encoding($title, 'utf-8', $charset);
1314                 }
1315             }
1316
1317             if ($url == '') {
1318                 $url = '?' . smallHash($linkdate . $LINKSDB->getNextId());
1319                 $title = $conf->get('general.default_note_title', t('Note: '));
1320             }
1321             $url = escape($url);
1322             $title = escape($title);
1323
1324             $link = array(
1325                 'linkdate' => $linkdate,
1326                 'title' => $title,
1327                 'url' => $url,
1328                 'description' => $description,
1329                 'tags' => $tags,
1330                 'private' => $private,
1331             );
1332         } else {
1333             $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1334         }
1335
1336         $data = array(
1337             'link' => $link,
1338             'link_is_new' => $link_is_new,
1339             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1340             'source' => (isset($_GET['source']) ? $_GET['source'] : ''),
1341             'tags' => $LINKSDB->linksCountPerTag(),
1342             'default_private_links' => $conf->get('privacy.default_private_links', false),
1343         );
1344         $pluginManager->executeHooks('render_editlink', $data);
1345
1346         foreach ($data as $key => $value) {
1347             $PAGE->assign($key, $value);
1348         }
1349
1350         $PAGE->assign('pagetitle', t('Shaare') .' - '. $conf->get('general.title', 'Shaarli'));
1351         $PAGE->renderPage('editlink');
1352         exit;
1353     }
1354
1355     if ($targetPage == Router::$PAGE_EXPORT) {
1356         // Export links as a Netscape Bookmarks file
1357
1358         if (empty($_GET['selection'])) {
1359             $PAGE->assign('pagetitle', t('Export') .' - '. $conf->get('general.title', 'Shaarli'));
1360             $PAGE->renderPage('export');
1361             exit;
1362         }
1363
1364         // export as bookmarks_(all|private|public)_YYYYmmdd_HHMMSS.html
1365         $selection = $_GET['selection'];
1366         if (isset($_GET['prepend_note_url'])) {
1367             $prependNoteUrl = $_GET['prepend_note_url'];
1368         } else {
1369             $prependNoteUrl = false;
1370         }
1371
1372         try {
1373             $PAGE->assign(
1374                 'links',
1375                 NetscapeBookmarkUtils::filterAndFormat(
1376                     $LINKSDB,
1377                     $selection,
1378                     $prependNoteUrl,
1379                     index_url($_SERVER)
1380                 )
1381             );
1382         } catch (Exception $exc) {
1383             header('Content-Type: text/plain; charset=utf-8');
1384             echo $exc->getMessage();
1385             exit;
1386         }
1387         $now = new DateTime();
1388         header('Content-Type: text/html; charset=utf-8');
1389         header(
1390             'Content-disposition: attachment; filename=bookmarks_'
1391            .$selection.'_'.$now->format(LinkDB::LINK_DATE_FORMAT).'.html'
1392         );
1393         $PAGE->assign('date', $now->format(DateTime::RFC822));
1394         $PAGE->assign('eol', PHP_EOL);
1395         $PAGE->assign('selection', $selection);
1396         $PAGE->renderPage('export.bookmarks');
1397         exit;
1398     }
1399
1400     if ($targetPage == Router::$PAGE_IMPORT) {
1401         // Upload a Netscape bookmark dump to import its contents
1402
1403         if (! isset($_POST['token']) || ! isset($_FILES['filetoupload'])) {
1404             // Show import dialog
1405             $PAGE->assign(
1406                 'maxfilesize',
1407                 get_max_upload_size(
1408                     ini_get('post_max_size'),
1409                     ini_get('upload_max_filesize'),
1410                     false
1411                 )
1412             );
1413             $PAGE->assign(
1414                 'maxfilesizeHuman',
1415                 get_max_upload_size(
1416                     ini_get('post_max_size'),
1417                     ini_get('upload_max_filesize'),
1418                     true
1419                 )
1420             );
1421             $PAGE->assign('pagetitle', t('Import') .' - '. $conf->get('general.title', 'Shaarli'));
1422             $PAGE->renderPage('import');
1423             exit;
1424         }
1425
1426         // Import bookmarks from an uploaded file
1427         if (isset($_FILES['filetoupload']['size']) && $_FILES['filetoupload']['size'] == 0) {
1428             // The file is too big or some form field may be missing.
1429             $msg = sprintf(
1430                 t(
1431                     'The file you are trying to upload is probably bigger than what this webserver can accept'
1432                     .' (%s). Please upload in smaller chunks.'
1433                 ),
1434                 get_max_upload_size(ini_get('post_max_size'), ini_get('upload_max_filesize'))
1435             );
1436             echo '<script>alert("'. $msg .'");document.location=\'?do='.Router::$PAGE_IMPORT .'\';</script>';
1437             exit;
1438         }
1439         if (! $sessionManager->checkToken($_POST['token'])) {
1440             die('Wrong token.');
1441         }
1442         $status = NetscapeBookmarkUtils::import(
1443             $_POST,
1444             $_FILES,
1445             $LINKSDB,
1446             $conf,
1447             $history
1448         );
1449         echo '<script>alert("'.$status.'");document.location=\'?do='
1450              .Router::$PAGE_IMPORT .'\';</script>';
1451         exit;
1452     }
1453
1454     // Plugin administration page
1455     if ($targetPage == Router::$PAGE_PLUGINSADMIN) {
1456         $pluginMeta = $pluginManager->getPluginsMeta();
1457
1458         // Split plugins into 2 arrays: ordered enabled plugins and disabled.
1459         $enabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] !== false; });
1460         // Load parameters.
1461         $enabledPlugins = load_plugin_parameter_values($enabledPlugins, $conf->get('plugins', array()));
1462         uasort(
1463             $enabledPlugins,
1464             function($a, $b) { return $a['order'] - $b['order']; }
1465         );
1466         $disabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] === false; });
1467
1468         $PAGE->assign('enabledPlugins', $enabledPlugins);
1469         $PAGE->assign('disabledPlugins', $disabledPlugins);
1470         $PAGE->assign('pagetitle', t('Plugin administration') .' - '. $conf->get('general.title', 'Shaarli'));
1471         $PAGE->renderPage('pluginsadmin');
1472         exit;
1473     }
1474
1475     // Plugin administration form action
1476     if ($targetPage == Router::$PAGE_SAVE_PLUGINSADMIN) {
1477         try {
1478             if (isset($_POST['parameters_form'])) {
1479                 unset($_POST['parameters_form']);
1480                 foreach ($_POST as $param => $value) {
1481                     $conf->set('plugins.'. $param, escape($value));
1482                 }
1483             }
1484             else {
1485                 $conf->set('general.enabled_plugins', save_plugin_config($_POST));
1486             }
1487             $conf->write($loginManager->isLoggedIn());
1488             $history->updateSettings();
1489         }
1490         catch (Exception $e) {
1491             error_log(
1492                 'ERROR while saving plugin configuration:.' . PHP_EOL .
1493                 $e->getMessage()
1494             );
1495
1496             // TODO: do not handle exceptions/errors in JS.
1497             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do='. Router::$PAGE_PLUGINSADMIN .'\';</script>';
1498             exit;
1499         }
1500         header('Location: ?do='. Router::$PAGE_PLUGINSADMIN);
1501         exit;
1502     }
1503
1504     // Get a fresh token
1505     if ($targetPage == Router::$GET_TOKEN) {
1506         header('Content-Type:text/plain');
1507         echo $sessionManager->generateToken($conf);
1508         exit;
1509     }
1510
1511     // -------- Thumbnails Update
1512     if ($targetPage == Router::$PAGE_THUMBS_UPDATE) {
1513         $ids = [];
1514         foreach ($LINKSDB as $link) {
1515             // A note or not HTTP(S)
1516             if ($link['url'][0] === '?' || ! startsWith(strtolower($link['url']), 'http')) {
1517                 continue;
1518             }
1519             $ids[] = $link['id'];
1520         }
1521         $PAGE->assign('ids', $ids);
1522         $PAGE->assign('pagetitle', t('Thumbnails update') .' - '. $conf->get('general.title', 'Shaarli'));
1523         $PAGE->renderPage('thumbnails');
1524         exit;
1525     }
1526
1527     // -------- Single Thumbnail Update
1528     if ($targetPage == Router::$AJAX_THUMB_UPDATE) {
1529         if (! isset($_POST['id']) || ! ctype_digit($_POST['id'])) {
1530             http_response_code(400);
1531             exit;
1532         }
1533         $id = (int) $_POST['id'];
1534         if (empty($LINKSDB[$id])) {
1535             http_response_code(404);
1536             exit;
1537         }
1538         $thumbnailer = new Thumbnailer($conf);
1539         $link = $LINKSDB[$id];
1540         $link['thumbnail'] = $thumbnailer->get($link['url']);
1541         $LINKSDB[$id] = $link;
1542         $LINKSDB->save($conf->get('resource.page_cache'));
1543
1544         echo json_encode($link);
1545         exit;
1546     }
1547
1548     // -------- Otherwise, simply display search form and links:
1549     showLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
1550     exit;
1551 }
1552
1553 /**
1554  * Template for the list of links (<div id="linklist">)
1555  * This function fills all the necessary fields in the $PAGE for the template 'linklist.html'
1556  *
1557  * @param pageBuilder   $PAGE          pageBuilder instance.
1558  * @param LinkDB        $LINKSDB       LinkDB instance.
1559  * @param ConfigManager $conf          Configuration Manager instance.
1560  * @param PluginManager $pluginManager Plugin Manager instance.
1561  * @param LoginManager  $loginManager  LoginManager instance
1562  */
1563 function buildLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager)
1564 {
1565     // Used in templates
1566     if (isset($_GET['searchtags'])) {
1567         if (! empty($_GET['searchtags'])) {
1568             $searchtags = escape(normalize_spaces($_GET['searchtags']));
1569         } else {
1570             $searchtags = false;
1571         }
1572     } else {
1573         $searchtags = '';
1574     }
1575     $searchterm = !empty($_GET['searchterm']) ? escape(normalize_spaces($_GET['searchterm'])) : '';
1576
1577     // Smallhash filter
1578     if (! empty($_SERVER['QUERY_STRING'])
1579         && preg_match('/^[a-zA-Z0-9-_@]{6}($|&|#)/', $_SERVER['QUERY_STRING'])) {
1580         try {
1581             $linksToDisplay = $LINKSDB->filterHash($_SERVER['QUERY_STRING']);
1582         } catch (LinkNotFoundException $e) {
1583             $PAGE->render404($e->getMessage());
1584             exit;
1585         }
1586     } else {
1587         // Filter links according search parameters.
1588         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
1589         $request = [
1590             'searchtags' => $searchtags,
1591             'searchterm' => $searchterm,
1592         ];
1593         $linksToDisplay = $LINKSDB->filterSearch($request, false, $visibility, !empty($_SESSION['untaggedonly']));
1594     }
1595
1596     // ---- Handle paging.
1597     $keys = array();
1598     foreach ($linksToDisplay as $key => $value) {
1599         $keys[] = $key;
1600     }
1601
1602     // Select articles according to paging.
1603     $pagecount = ceil(count($keys) / $_SESSION['LINKS_PER_PAGE']);
1604     $pagecount = $pagecount == 0 ? 1 : $pagecount;
1605     $page= empty($_GET['page']) ? 1 : intval($_GET['page']);
1606     $page = $page < 1 ? 1 : $page;
1607     $page = $page > $pagecount ? $pagecount : $page;
1608     // Start index.
1609     $i = ($page-1) * $_SESSION['LINKS_PER_PAGE'];
1610     $end = $i + $_SESSION['LINKS_PER_PAGE'];
1611
1612     $thumbnailsEnabled = $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE) !== Thumbnailer::MODE_NONE;
1613     if ($thumbnailsEnabled) {
1614         $thumbnailer = new Thumbnailer($conf);
1615     }
1616
1617     $linkDisp = array();
1618     while ($i<$end && $i<count($keys))
1619     {
1620         $link = $linksToDisplay[$keys[$i]];
1621         $link['description'] = format_description(
1622             $link['description'],
1623             $conf->get('redirector.url'),
1624             $conf->get('redirector.encode_url')
1625         );
1626         $classLi =  ($i % 2) != 0 ? '' : 'publicLinkHightLight';
1627         $link['class'] = $link['private'] == 0 ? $classLi : 'private';
1628         $link['timestamp'] = $link['created']->getTimestamp();
1629         if (! empty($link['updated'])) {
1630             $link['updated_timestamp'] = $link['updated']->getTimestamp();
1631         } else {
1632             $link['updated_timestamp'] = '';
1633         }
1634         $taglist = preg_split('/\s+/', $link['tags'], -1, PREG_SPLIT_NO_EMPTY);
1635         uasort($taglist, 'strcasecmp');
1636         $link['taglist'] = $taglist;
1637
1638         // Thumbnails enabled, not a note,
1639         // and (never retrieved yet or no valid cache file)
1640         if ($thumbnailsEnabled && $link['url'][0] != '?'
1641             && (! isset($link['thumbnail']) || ($link['thumbnail'] !== false && ! is_file($link['thumbnail'])))
1642         ) {
1643             $elem = $LINKSDB[$keys[$i]];
1644             $elem['thumbnail'] = $thumbnailer->get($link['url']);
1645             $LINKSDB[$keys[$i]] = $elem;
1646             $updateDB = true;
1647             $link['thumbnail'] = $elem['thumbnail'];
1648         }
1649
1650         // Check for both signs of a note: starting with ? and 7 chars long.
1651         if ($link['url'][0] === '?' && strlen($link['url']) === 7) {
1652             $link['url'] = index_url($_SERVER) . $link['url'];
1653         }
1654
1655         $linkDisp[$keys[$i]] = $link;
1656         $i++;
1657     }
1658
1659     // If we retrieved new thumbnails, we update the database.
1660     if (!empty($updateDB)) {
1661         $LINKSDB->save($conf->get('resource.page_cache'));
1662     }
1663
1664     // Compute paging navigation
1665     $searchtagsUrl = $searchtags === '' ? '' : '&searchtags=' . urlencode($searchtags);
1666     $searchtermUrl = empty($searchterm) ? '' : '&searchterm=' . urlencode($searchterm);
1667     $previous_page_url = '';
1668     if ($i != count($keys)) {
1669         $previous_page_url = '?page=' . ($page+1) . $searchtermUrl . $searchtagsUrl;
1670     }
1671     $next_page_url='';
1672     if ($page>1) {
1673         $next_page_url = '?page=' . ($page-1) . $searchtermUrl . $searchtagsUrl;
1674     }
1675
1676     // Fill all template fields.
1677     $data = array(
1678         'previous_page_url' => $previous_page_url,
1679         'next_page_url' => $next_page_url,
1680         'page_current' => $page,
1681         'page_max' => $pagecount,
1682         'result_count' => count($linksToDisplay),
1683         'search_term' => $searchterm,
1684         'search_tags' => $searchtags,
1685         'visibility' => ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '',
1686         'redirector' => $conf->get('redirector.url'),  // Optional redirector URL.
1687         'links' => $linkDisp,
1688     );
1689
1690     // If there is only a single link, we change on-the-fly the title of the page.
1691     if (count($linksToDisplay) == 1) {
1692         $data['pagetitle'] = $linksToDisplay[$keys[0]]['title'] .' - '. $conf->get('general.title');
1693     } elseif (! empty($searchterm) || ! empty($searchtags)) {
1694         $data['pagetitle'] = t('Search: ');
1695         $data['pagetitle'] .= ! empty($searchterm) ? $searchterm .' ' : '';
1696         $bracketWrap = function ($tag) {
1697             return '['. $tag .']';
1698         };
1699         $data['pagetitle'] .= ! empty($searchtags)
1700             ? implode(' ', array_map($bracketWrap, preg_split('/\s+/', $searchtags))).' '
1701             : '';
1702         $data['pagetitle'] .= '- '. $conf->get('general.title');
1703     }
1704
1705     $pluginManager->executeHooks('render_linklist', $data, array('loggedin' => $loginManager->isLoggedIn()));
1706
1707     foreach ($data as $key => $value) {
1708         $PAGE->assign($key, $value);
1709     }
1710
1711     return;
1712 }
1713
1714 /**
1715  * Installation
1716  * This function should NEVER be called if the file data/config.php exists.
1717  *
1718  * @param ConfigManager  $conf           Configuration Manager instance.
1719  * @param SessionManager $sessionManager SessionManager instance
1720  * @param LoginManager   $loginManager   LoginManager instance
1721  */
1722 function install($conf, $sessionManager, $loginManager) {
1723     // On free.fr host, make sure the /sessions directory exists, otherwise login will not work.
1724     if (endsWith($_SERVER['HTTP_HOST'],'.free.fr') && !is_dir($_SERVER['DOCUMENT_ROOT'].'/sessions')) mkdir($_SERVER['DOCUMENT_ROOT'].'/sessions',0705);
1725
1726
1727     // This part makes sure sessions works correctly.
1728     // (Because on some hosts, session.save_path may not be set correctly,
1729     // or we may not have write access to it.)
1730     if (isset($_GET['test_session']) && ( !isset($_SESSION) || !isset($_SESSION['session_tested']) || $_SESSION['session_tested']!='Working'))
1731     {
1732         // Step 2: Check if data in session is correct.
1733         $msg = t(
1734             '<pre>Sessions do not seem to work correctly on your server.<br>'.
1735             'Make sure the variable "session.save_path" is set correctly in your PHP config, '.
1736             'and that you have write access to it.<br>'.
1737             'It currently points to %s.<br>'.
1738             'On some browsers, accessing your server via a hostname like \'localhost\' '.
1739             'or any custom hostname without a dot causes cookie storage to fail. '.
1740             'We recommend accessing your server via it\'s IP address or Fully Qualified Domain Name.<br>'
1741         );
1742         $msg = sprintf($msg, session_save_path());
1743         echo $msg;
1744         echo '<br><a href="?">'. t('Click to try again.') .'</a></pre>';
1745         die;
1746     }
1747     if (!isset($_SESSION['session_tested']))
1748     {   // Step 1 : Try to store data in session and reload page.
1749         $_SESSION['session_tested'] = 'Working';  // Try to set a variable in session.
1750         header('Location: '.index_url($_SERVER).'?test_session');  // Redirect to check stored data.
1751     }
1752     if (isset($_GET['test_session']))
1753     {   // Step 3: Sessions are OK. Remove test parameter from URL.
1754         header('Location: '.index_url($_SERVER));
1755     }
1756
1757
1758     if (!empty($_POST['setlogin']) && !empty($_POST['setpassword']))
1759     {
1760         $tz = 'UTC';
1761         if (!empty($_POST['continent']) && !empty($_POST['city'])
1762             && isTimeZoneValid($_POST['continent'], $_POST['city'])
1763         ) {
1764             $tz = $_POST['continent'].'/'.$_POST['city'];
1765         }
1766         $conf->set('general.timezone', $tz);
1767         $login = $_POST['setlogin'];
1768         $conf->set('credentials.login', $login);
1769         $salt = sha1(uniqid('', true) .'_'. mt_rand());
1770         $conf->set('credentials.salt', $salt);
1771         $conf->set('credentials.hash', sha1($_POST['setpassword'] . $login . $salt));
1772         if (!empty($_POST['title'])) {
1773             $conf->set('general.title', escape($_POST['title']));
1774         } else {
1775             $conf->set('general.title', 'Shared links on '.escape(index_url($_SERVER)));
1776         }
1777         $conf->set('translation.language', escape($_POST['language']));
1778         $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1779         $conf->set('api.enabled', !empty($_POST['enableApi']));
1780         $conf->set(
1781             'api.secret',
1782             generate_api_secret(
1783                 $conf->get('credentials.login'),
1784                 $conf->get('credentials.salt')
1785             )
1786         );
1787         try {
1788             // Everything is ok, let's create config file.
1789             $conf->write($loginManager->isLoggedIn());
1790         }
1791         catch(Exception $e) {
1792             error_log(
1793                     'ERROR while writing config file after installation.' . PHP_EOL .
1794                     $e->getMessage()
1795                 );
1796
1797             // TODO: do not handle exceptions/errors in JS.
1798             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?\';</script>';
1799             exit;
1800         }
1801         echo '<script>alert("Shaarli is now configured. Please enter your login/password and start shaaring your links!");document.location=\'?do=login\';</script>';
1802         exit;
1803     }
1804
1805     $PAGE = new PageBuilder($conf, $_SESSION, null, $sessionManager->generateToken());
1806     list($continents, $cities) = generateTimeZoneData(timezone_identifiers_list(), date_default_timezone_get());
1807     $PAGE->assign('continents', $continents);
1808     $PAGE->assign('cities', $cities);
1809     $PAGE->assign('languages', Languages::getAvailableLanguages());
1810     $PAGE->renderPage('install');
1811     exit;
1812 }
1813
1814 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=dailyrss')) {
1815     showDailyRSS($conf, $loginManager);
1816     exit;
1817 }
1818
1819 if (!isset($_SESSION['LINKS_PER_PAGE'])) {
1820     $_SESSION['LINKS_PER_PAGE'] = $conf->get('general.links_per_page', 20);
1821 }
1822
1823 try {
1824     $history = new History($conf->get('resource.history'));
1825 } catch(Exception $e) {
1826     die($e->getMessage());
1827 }
1828
1829 $linkDb = new LinkDB(
1830     $conf->get('resource.datastore'),
1831     $loginManager->isLoggedIn(),
1832     $conf->get('privacy.hide_public_links'),
1833     $conf->get('redirector.url'),
1834     $conf->get('redirector.encode_url')
1835 );
1836
1837 $container = new \Slim\Container();
1838 $container['conf'] = $conf;
1839 $container['plugins'] = $pluginManager;
1840 $container['history'] = $history;
1841 $app = new \Slim\App($container);
1842
1843 // REST API routes
1844 $app->group('/api/v1', function() {
1845     $this->get('/info', '\Shaarli\Api\Controllers\Info:getInfo')->setName('getInfo');
1846     $this->get('/links', '\Shaarli\Api\Controllers\Links:getLinks')->setName('getLinks');
1847     $this->get('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:getLink')->setName('getLink');
1848     $this->post('/links', '\Shaarli\Api\Controllers\Links:postLink')->setName('postLink');
1849     $this->put('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:putLink')->setName('putLink');
1850     $this->delete('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:deleteLink')->setName('deleteLink');
1851
1852     $this->get('/tags', '\Shaarli\Api\Controllers\Tags:getTags')->setName('getTags');
1853     $this->get('/tags/{tagName:[\w]+}', '\Shaarli\Api\Controllers\Tags:getTag')->setName('getTag');
1854     $this->put('/tags/{tagName:[\w]+}', '\Shaarli\Api\Controllers\Tags:putTag')->setName('putTag');
1855     $this->delete('/tags/{tagName:[\w]+}', '\Shaarli\Api\Controllers\Tags:deleteTag')->setName('deleteTag');
1856
1857     $this->get('/history', '\Shaarli\Api\Controllers\History:getHistory')->setName('getHistory');
1858 })->add('\Shaarli\Api\ApiMiddleware');
1859
1860 $response = $app->run(true);
1861 // Hack to make Slim and Shaarli router work together:
1862 // If a Slim route isn't found and NOT API call, we call renderPage().
1863 if ($response->getStatusCode() == 404 && strpos($_SERVER['REQUEST_URI'], '/api/v1') === false) {
1864     // We use UTF-8 for proper international characters handling.
1865     header('Content-Type: text/html; charset=utf-8');
1866     renderPage($conf, $pluginManager, $linkDb, $history, $sessionManager, $loginManager);
1867 } else {
1868     $app->respond($response);
1869 }