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             $link['thumbnail'] = thumbnail($conf, $link['url']);
 360             $link['timestamp'] = $link['created']->getTimestamp();
 361             if (startsWith($link['url'], '?')) {
 362                 $link['url'] = index_url($_SERVER) . $link['url'];  // make permalink URL absolute
 363             }
 364         }
 365
 366         // Then build the HTML for this day:
 367         $tpl = new RainTPL;
 368         $tpl->assign('title', $conf->get('general.title'));
 369         $tpl->assign('daydate', $dayDate->getTimestamp());
 370         $tpl->assign('absurl', $absurl);
 371         $tpl->assign('links', $links);
 372         $tpl->assign('rssdate', escape($dayDate->format(DateTime::RSS)));
 373         $tpl->assign('hide_timestamps', $conf->get('privacy.hide_timestamps', false));
 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]['thumbnail'] = thumbnail($conf, $link['url']);
 437         $linksToDisplay[$key]['timestamp'] =  $link['created']->getTimestamp();
 438     }
 439
 440     $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 441     $data = array(
 442         'pagetitle' => $conf->get('general.title') .' - '. format_date($dayDate, false),
 443         'linksToDisplay' => $linksToDisplay,
 444         'day' => $dayDate->getTimestamp(),
 445         'dayDate' => $dayDate,
 446         'previousday' => $previousday,
 447         'nextday' => $nextday,
 448     );
 449
 450     /* Hook is called before column construction so that plugins don't have
 451        to deal with columns. */
 452     $pluginManager->executeHooks('render_daily', $data, array('loggedin' => $loginManager->isLoggedIn()));
 453
 454     /* We need to spread the articles on 3 columns.
 455        I did not want to use a JavaScript lib like http://masonry.desandro.com/
 456        so I manually spread entries with a simple method: I roughly evaluate the
 457        height of a div according to title and description length.
 458     */
 459     $columns = array(array(), array(), array()); // Entries to display, for each column.
 460     $fill = array(0, 0, 0);  // Rough estimate of columns fill.
 461     foreach($data['linksToDisplay'] as $key => $link) {
 462         // Roughly estimate length of entry (by counting characters)
 463         // Title: 30 chars = 1 line. 1 line is 30 pixels height.
 464         // Description: 836 characters gives roughly 342 pixel height.
 465         // This is not perfect, but it's usually OK.
 466         $length = strlen($link['title']) + (342 * strlen($link['description'])) / 836;
 467         if ($link['thumbnail']) {
 468           $length += 100; // 1 thumbnails roughly takes 100 pixels height.
 469         }
 470         // Then put in column which is the less filled:
 471         $smallest = min($fill); // find smallest value in array.
 472         $index = array_search($smallest, $fill); // find index of this smallest value.
 473         array_push($columns[$index], $link); // Put entry in this column.
 474         $fill[$index] += $length;
 475     }
 476
 477     $data['cols'] = $columns;
 478
 479     foreach ($data as $key => $value) {
 480         $pageBuilder->assign($key, $value);
 481     }
 482
 483     $pageBuilder->assign('pagetitle', t('Daily') .' - '. $conf->get('general.title', 'Shaarli'));
 484     $pageBuilder->renderPage('daily');
 485     exit;
 486 }
 487
 488 /**
 489  * Renders the linklist
 490  *
 491  * @param pageBuilder   $PAGE    pageBuilder instance.
 492  * @param LinkDB        $LINKSDB LinkDB instance.
 493  * @param ConfigManager $conf    Configuration Manager instance.
 494  * @param PluginManager $pluginManager Plugin Manager instance.
 495  */
 496 function showLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager) {
 497     buildLinkList($PAGE,$LINKSDB, $conf, $pluginManager, $loginManager);
 498     $PAGE->renderPage('linklist');
 499 }
 500
 501 /**
 502  * Render HTML page (according to URL parameters and user rights)
 503  *
 504  * @param ConfigManager  $conf           Configuration Manager instance.
 505  * @param PluginManager  $pluginManager  Plugin Manager instance,
 506  * @param LinkDB         $LINKSDB
 507  * @param History        $history        instance
 508  * @param SessionManager $sessionManager SessionManager instance
 509  * @param LoginManager   $loginManager   LoginManager instance
 510  */
 511 function renderPage($conf, $pluginManager, $LINKSDB, $history, $sessionManager, $loginManager)
 512 {
 513     $updater = new Updater(
 514         read_updates_file($conf->get('resource.updates')),
 515         $LINKSDB,
 516         $conf,
 517         $loginManager->isLoggedIn(),
 518         $_SESSION
 519     );
 520     try {
 521         $newUpdates = $updater->update();
 522         if (! empty($newUpdates)) {
 523             write_updates_file(
 524                 $conf->get('resource.updates'),
 525                 $updater->getDoneUpdates()
 526             );
 527         }
 528     }
 529     catch(Exception $e) {
 530         die($e->getMessage());
 531     }
 532
 533     $PAGE = new PageBuilder($conf, $_SESSION, $LINKSDB, $sessionManager->generateToken(), $loginManager->isLoggedIn());
 534     $PAGE->assign('linkcount', count($LINKSDB));
 535     $PAGE->assign('privateLinkcount', count_private($LINKSDB));
 536     $PAGE->assign('plugin_errors', $pluginManager->getErrors());
 537
 538     // Determine which page will be rendered.
 539     $query = (isset($_SERVER['QUERY_STRING'])) ? $_SERVER['QUERY_STRING'] : '';
 540     $targetPage = Router::findPage($query, $_GET, $loginManager->isLoggedIn());
 541
 542     if (
 543         // if the user isn't logged in
 544         !$loginManager->isLoggedIn() &&
 545         // and Shaarli doesn't have public content...
 546         $conf->get('privacy.hide_public_links') &&
 547         // and is configured to enforce the login
 548         $conf->get('privacy.force_login') &&
 549         // and the current page isn't already the login page
 550         $targetPage !== Router::$PAGE_LOGIN &&
 551         // and the user is not requesting a feed (which would lead to a different content-type as expected)
 552         $targetPage !== Router::$PAGE_FEED_ATOM &&
 553         $targetPage !== Router::$PAGE_FEED_RSS
 554     ) {
 555         // force current page to be the login page
 556         $targetPage = Router::$PAGE_LOGIN;
 557     }
 558
 559     // Call plugin hooks for header, footer and includes, specifying which page will be rendered.
 560     // Then assign generated data to RainTPL.
 561     $common_hooks = array(
 562         'includes',
 563         'header',
 564         'footer',
 565     );
 566
 567     foreach($common_hooks as $name) {
 568         $plugin_data = array();
 569         $pluginManager->executeHooks('render_' . $name, $plugin_data,
 570             array(
 571                 'target' => $targetPage,
 572                 'loggedin' => $loginManager->isLoggedIn()
 573             )
 574         );
 575         $PAGE->assign('plugins_' . $name, $plugin_data);
 576     }
 577
 578     // -------- Display login form.
 579     if ($targetPage == Router::$PAGE_LOGIN)
 580     {
 581         if ($conf->get('security.open_shaarli')) { header('Location: ?'); exit; }  // No need to login for open Shaarli
 582         if (isset($_GET['username'])) {
 583             $PAGE->assign('username', escape($_GET['username']));
 584         }
 585         $PAGE->assign('returnurl',(isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']):''));
 586         // add default state of the 'remember me' checkbox
 587         $PAGE->assign('remember_user_default', $conf->get('privacy.remember_user_default'));
 588         $PAGE->assign('user_can_login', $loginManager->canLogin($_SERVER));
 589         $PAGE->assign('pagetitle', t('Login') .' - '. $conf->get('general.title', 'Shaarli'));
 590         $PAGE->renderPage('loginform');
 591         exit;
 592     }
 593     // -------- User wants to logout.
 594     if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=logout'))
 595     {
 596         invalidateCaches($conf->get('resource.page_cache'));
 597         $sessionManager->logout();
 598         setcookie(LoginManager::$STAY_SIGNED_IN_COOKIE, 'false', 0, WEB_PATH);
 599         header('Location: ?');
 600         exit;
 601     }
 602
 603     // -------- Picture wall
 604     if ($targetPage == Router::$PAGE_PICWALL)
 605     {
 606         $PAGE->assign('pagetitle', t('Picture wall') .' - '. $conf->get('general.title', 'Shaarli'));
 607         if (! $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE) === Thumbnailer::MODE_NONE) {
 608             $PAGE->assign('linksToDisplay', []);
 609             $PAGE->renderPage('picwall');
 610             exit;
 611         }
 612
 613         // Optionally filter the results:
 614         $links = $LINKSDB->filterSearch($_GET);
 615         $linksToDisplay = array();
 616
 617         // Get only links which have a thumbnail.
 618         // Note: we do not retrieve thumbnails here, the request is too heavy.
 619         foreach($links as $key => $link)
 620         {
 621             if (isset($link['thumbnail']) && $link['thumbnail'] !== false) {
 622                 $linksToDisplay[] = $link; // Add to array.
 623             }
 624         }
 625
 626         $data = array(
 627             'linksToDisplay' => $linksToDisplay,
 628         );
 629         $pluginManager->executeHooks('render_picwall', $data, array('loggedin' => $loginManager->isLoggedIn()));
 630
 631         foreach ($data as $key => $value) {
 632             $PAGE->assign($key, $value);
 633         }
 634
 635
 636         $PAGE->renderPage('picwall');
 637         exit;
 638     }
 639
 640     // -------- Tag cloud
 641     if ($targetPage == Router::$PAGE_TAGCLOUD)
 642     {
 643         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
 644         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 645         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 646
 647         // We sort tags alphabetically, then choose a font size according to count.
 648         // First, find max value.
 649         $maxcount = 0;
 650         foreach ($tags as $value) {
 651             $maxcount = max($maxcount, $value);
 652         }
 653
 654         alphabetical_sort($tags, false, true);
 655
 656         $tagList = array();
 657         foreach($tags as $key => $value) {
 658             if (in_array($key, $filteringTags)) {
 659                 continue;
 660             }
 661             // Tag font size scaling:
 662             //   default 15 and 30 logarithm bases affect scaling,
 663             //   22 and 6 are arbitrary font sizes for max and min sizes.
 664             $size = log($value, 15) / log($maxcount, 30) * 2.2 + 0.8;
 665             $tagList[$key] = array(
 666                 'count' => $value,
 667                 'size' => number_format($size, 2, '.', ''),
 668             );
 669         }
 670
 671         $searchTags = implode(' ', escape($filteringTags));
 672         $data = array(
 673             'search_tags' => $searchTags,
 674             'tags' => $tagList,
 675         );
 676         $pluginManager->executeHooks('render_tagcloud', $data, array('loggedin' => $loginManager->isLoggedIn()));
 677
 678         foreach ($data as $key => $value) {
 679             $PAGE->assign($key, $value);
 680         }
 681
 682         $searchTags = ! empty($searchTags) ? $searchTags .' - ' : '';
 683         $PAGE->assign('pagetitle', $searchTags. t('Tag cloud') .' - '. $conf->get('general.title', 'Shaarli'));
 684         $PAGE->renderPage('tag.cloud');
 685         exit;
 686     }
 687
 688     // -------- Tag list
 689     if ($targetPage == Router::$PAGE_TAGLIST)
 690     {
 691         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
 692         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 693         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 694         foreach ($filteringTags as $tag) {
 695             if (array_key_exists($tag, $tags)) {
 696                 unset($tags[$tag]);
 697             }
 698         }
 699
 700         if (! empty($_GET['sort']) && $_GET['sort'] === 'alpha') {
 701             alphabetical_sort($tags, false, true);
 702         }
 703
 704         $searchTags = implode(' ', escape($filteringTags));
 705         $data = [
 706             'search_tags' => $searchTags,
 707             'tags' => $tags,
 708         ];
 709         $pluginManager->executeHooks('render_taglist', $data, ['loggedin' => $loginManager->isLoggedIn()]);
 710
 711         foreach ($data as $key => $value) {
 712             $PAGE->assign($key, $value);
 713         }
 714
 715         $searchTags = ! empty($searchTags) ? $searchTags .' - ' : '';
 716         $PAGE->assign('pagetitle', $searchTags . t('Tag list') .' - '. $conf->get('general.title', 'Shaarli'));
 717         $PAGE->renderPage('tag.list');
 718         exit;
 719     }
 720
 721     // Daily page.
 722     if ($targetPage == Router::$PAGE_DAILY) {
 723         showDaily($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
 724     }
 725
 726     // ATOM and RSS feed.
 727     if ($targetPage == Router::$PAGE_FEED_ATOM || $targetPage == Router::$PAGE_FEED_RSS) {
 728         $feedType = $targetPage == Router::$PAGE_FEED_RSS ? FeedBuilder::$FEED_RSS : FeedBuilder::$FEED_ATOM;
 729         header('Content-Type: application/'. $feedType .'+xml; charset=utf-8');
 730
 731         // Cache system
 732         $query = $_SERVER['QUERY_STRING'];
 733         $cache = new CachedPage(
 734             $conf->get('resource.page_cache'),
 735             page_url($_SERVER),
 736             startsWith($query,'do='. $targetPage) && !$loginManager->isLoggedIn()
 737         );
 738         $cached = $cache->cachedVersion();
 739         if (!empty($cached)) {
 740             echo $cached;
 741             exit;
 742         }
 743
 744         // Generate data.
 745         $feedGenerator = new FeedBuilder($LINKSDB, $feedType, $_SERVER, $_GET, $loginManager->isLoggedIn());
 746         $feedGenerator->setLocale(strtolower(setlocale(LC_COLLATE, 0)));
 747         $feedGenerator->setHideDates($conf->get('privacy.hide_timestamps') && !$loginManager->isLoggedIn());
 748         $feedGenerator->setUsePermalinks(isset($_GET['permalinks']) || !$conf->get('feed.rss_permalinks'));
 749         $data = $feedGenerator->buildData();
 750
 751         // Process plugin hook.
 752         $pluginManager->executeHooks('render_feed', $data, array(
 753             'loggedin' => $loginManager->isLoggedIn(),
 754             'target' => $targetPage,
 755         ));
 756
 757         // Render the template.
 758         $PAGE->assignAll($data);
 759         $PAGE->renderPage('feed.'. $feedType);
 760         $cache->cache(ob_get_contents());
 761         ob_end_flush();
 762         exit;
 763     }
 764
 765     // Display opensearch plugin (XML)
 766     if ($targetPage == Router::$PAGE_OPENSEARCH) {
 767         header('Content-Type: application/xml; charset=utf-8');
 768         $PAGE->assign('serverurl', index_url($_SERVER));
 769         $PAGE->renderPage('opensearch');
 770         exit;
 771     }
 772
 773     // -------- User clicks on a tag in a link: The tag is added to the list of searched tags (searchtags=...)
 774     if (isset($_GET['addtag']))
 775     {
 776         // Get previous URL (http_referer) and add the tag to the searchtags parameters in query.
 777         if (empty($_SERVER['HTTP_REFERER'])) { header('Location: ?searchtags='.urlencode($_GET['addtag'])); exit; } // In case browser does not send HTTP_REFERER
 778         parse_str(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_QUERY), $params);
 779
 780         // Prevent redirection loop
 781         if (isset($params['addtag'])) {
 782             unset($params['addtag']);
 783         }
 784
 785         // Check if this tag is already in the search query and ignore it if it is.
 786         // Each tag is always separated by a space
 787         if (isset($params['searchtags'])) {
 788             $current_tags = explode(' ', $params['searchtags']);
 789         } else {
 790             $current_tags = array();
 791         }
 792         $addtag = true;
 793         foreach ($current_tags as $value) {
 794             if ($value === $_GET['addtag']) {
 795                 $addtag = false;
 796                 break;
 797             }
 798         }
 799         // Append the tag if necessary
 800         if (empty($params['searchtags'])) {
 801             $params['searchtags'] = trim($_GET['addtag']);
 802         }
 803         elseif ($addtag) {
 804             $params['searchtags'] = trim($params['searchtags']).' '.trim($_GET['addtag']);
 805         }
 806
 807         unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
 808         header('Location: ?'.http_build_query($params));
 809         exit;
 810     }
 811
 812     // -------- User clicks on a tag in result count: Remove the tag from the list of searched tags (searchtags=...)
 813     if (isset($_GET['removetag'])) {
 814         // Get previous URL (http_referer) and remove the tag from the searchtags parameters in query.
 815         if (empty($_SERVER['HTTP_REFERER'])) {
 816             header('Location: ?');
 817             exit;
 818         }
 819
 820         // In case browser does not send HTTP_REFERER
 821         parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $params);
 822
 823         // Prevent redirection loop
 824         if (isset($params['removetag'])) {
 825             unset($params['removetag']);
 826         }
 827
 828         if (isset($params['searchtags'])) {
 829             $tags = explode(' ', $params['searchtags']);
 830             // Remove value from array $tags.
 831             $tags = array_diff($tags, array($_GET['removetag']));
 832             $params['searchtags'] = implode(' ',$tags);
 833
 834             if (empty($params['searchtags'])) {
 835                 unset($params['searchtags']);
 836             }
 837
 838             unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
 839         }
 840         header('Location: ?'.http_build_query($params));
 841         exit;
 842     }
 843
 844     // -------- User wants to change the number of links per page (linksperpage=...)
 845     if (isset($_GET['linksperpage'])) {
 846         if (is_numeric($_GET['linksperpage'])) {
 847             $_SESSION['LINKS_PER_PAGE']=abs(intval($_GET['linksperpage']));
 848         }
 849
 850         if (! empty($_SERVER['HTTP_REFERER'])) {
 851             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('linksperpage'));
 852         } else {
 853             $location = '?';
 854         }
 855         header('Location: '. $location);
 856         exit;
 857     }
 858
 859     // -------- User wants to see only private links (toggle)
 860     if (isset($_GET['visibility'])) {
 861         if ($_GET['visibility'] === 'private') {
 862             // Visibility not set or not already private, set private, otherwise reset it
 863             if (empty($_SESSION['visibility']) || $_SESSION['visibility'] !== 'private') {
 864                 // See only private links
 865                 $_SESSION['visibility'] = 'private';
 866             } else {
 867                 unset($_SESSION['visibility']);
 868             }
 869         } elseif ($_GET['visibility'] === 'public') {
 870             if (empty($_SESSION['visibility']) || $_SESSION['visibility'] !== 'public') {
 871                 // See only public links
 872                 $_SESSION['visibility'] = 'public';
 873             } else {
 874                 unset($_SESSION['visibility']);
 875             }
 876         }
 877
 878         if (! empty($_SERVER['HTTP_REFERER'])) {
 879             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('visibility'));
 880         } else {
 881             $location = '?';
 882         }
 883         header('Location: '. $location);
 884         exit;
 885     }
 886
 887     // -------- User wants to see only untagged links (toggle)
 888     if (isset($_GET['untaggedonly'])) {
 889         $_SESSION['untaggedonly'] = empty($_SESSION['untaggedonly']);
 890
 891         if (! empty($_SERVER['HTTP_REFERER'])) {
 892             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('untaggedonly'));
 893         } else {
 894             $location = '?';
 895         }
 896         header('Location: '. $location);
 897         exit;
 898     }
 899
 900     // -------- Handle other actions allowed for non-logged in users:
 901     if (!$loginManager->isLoggedIn())
 902     {
 903         // User tries to post new link but is not logged in:
 904         // Show login screen, then redirect to ?post=...
 905         if (isset($_GET['post']))
 906         {
 907             header( // Redirect to login page, then back to post link.
 908                 'Location: ?do=login&post='.urlencode($_GET['post']).
 909                 (!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').
 910                 (!empty($_GET['description'])?'&description='.urlencode($_GET['description']):'').
 911                 (!empty($_GET['tags'])?'&tags='.urlencode($_GET['tags']):'').
 912                 (!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')
 913             );
 914             exit;
 915         }
 916
 917         showLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
 918         if (isset($_GET['edit_link'])) {
 919             header('Location: ?do=login&edit_link='. escape($_GET['edit_link']));
 920             exit;
 921         }
 922
 923         exit; // Never remove this one! All operations below are reserved for logged in user.
 924     }
 925
 926     // -------- All other functions are reserved for the registered user:
 927
 928     // -------- Display the Tools menu if requested (import/export/bookmarklet...)
 929     if ($targetPage == Router::$PAGE_TOOLS)
 930     {
 931         $data = [
 932             'pageabsaddr' => index_url($_SERVER),
 933             'sslenabled' => is_https($_SERVER),
 934         ];
 935         $pluginManager->executeHooks('render_tools', $data);
 936
 937         foreach ($data as $key => $value) {
 938             $PAGE->assign($key, $value);
 939         }
 940
 941         $PAGE->assign('pagetitle', t('Tools') .' - '. $conf->get('general.title', 'Shaarli'));
 942         $PAGE->renderPage('tools');
 943         exit;
 944     }
 945
 946     // -------- User wants to change his/her password.
 947     if ($targetPage == Router::$PAGE_CHANGEPASSWORD)
 948     {
 949         if ($conf->get('security.open_shaarli')) {
 950             die(t('You are not supposed to change a password on an Open Shaarli.'));
 951         }
 952
 953         if (!empty($_POST['setpassword']) && !empty($_POST['oldpassword']))
 954         {
 955             if (!$sessionManager->checkToken($_POST['token'])) die(t('Wrong token.')); // Go away!
 956
 957             // Make sure old password is correct.
 958             $oldhash = sha1($_POST['oldpassword'].$conf->get('credentials.login').$conf->get('credentials.salt'));
 959             if ($oldhash!= $conf->get('credentials.hash')) {
 960                 echo '<script>alert("'. t('The old password is not correct.') .'");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             $conf->set('credentials.hash', sha1($_POST['setpassword'] . $conf->get('credentials.login') . $conf->get('credentials.salt')));
 967             try {
 968                 $conf->write($loginManager->isLoggedIn());
 969             }
 970             catch(Exception $e) {
 971                 error_log(
 972                     'ERROR while writing config file after changing password.' . PHP_EOL .
 973                     $e->getMessage()
 974                 );
 975
 976                 // TODO: do not handle exceptions/errors in JS.
 977                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=tools\';</script>';
 978                 exit;
 979             }
 980             echo '<script>alert("'. t('Your password has been changed') .'");document.location=\'?do=tools\';</script>';
 981             exit;
 982         }
 983         else // show the change password form.
 984         {
 985             $PAGE->assign('pagetitle', t('Change password') .' - '. $conf->get('general.title', 'Shaarli'));
 986             $PAGE->renderPage('changepassword');
 987             exit;
 988         }
 989     }
 990
 991     // -------- User wants to change configuration
 992     if ($targetPage == Router::$PAGE_CONFIGURE)
 993     {
 994         if (!empty($_POST['title']) )
 995         {
 996             if (!$sessionManager->checkToken($_POST['token'])) {
 997                 die(t('Wrong token.')); // Go away!
 998             }
 999             $tz = 'UTC';
1000             if (!empty($_POST['continent']) && !empty($_POST['city'])
1001                 && isTimeZoneValid($_POST['continent'], $_POST['city'])
1002             ) {
1003                 $tz = $_POST['continent'] . '/' . $_POST['city'];
1004             }
1005             $conf->set('general.timezone', $tz);
1006             $conf->set('general.title', escape($_POST['title']));
1007             $conf->set('general.header_link', escape($_POST['titleLink']));
1008             $conf->set('resource.theme', escape($_POST['theme']));
1009             $conf->set('security.session_protection_disabled', !empty($_POST['disablesessionprotection']));
1010             $conf->set('privacy.default_private_links', !empty($_POST['privateLinkByDefault']));
1011             $conf->set('feed.rss_permalinks', !empty($_POST['enableRssPermalinks']));
1012             $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1013             $conf->set('privacy.hide_public_links', !empty($_POST['hidePublicLinks']));
1014             $conf->set('api.enabled', !empty($_POST['enableApi']));
1015             $conf->set('api.secret', escape($_POST['apiSecret']));
1016             $conf->set('translation.language', escape($_POST['language']));
1017
1018             $thumbnailsMode = extension_loaded('gd') ? $_POST['enableThumbnails'] : Thumbnailer::MODE_NONE;
1019             if ($thumbnailsMode !== Thumbnailer::MODE_NONE
1020                 && $thumbnailsMode !== $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE)
1021             ) {
1022                 $_SESSION['warnings'][] = t(
1023                     'You have enabled or changed thumbnails mode. <a href="?do=thumbs_update">Please synchronize them</a>.'
1024                 );
1025             }
1026             $conf->set('thumbnails.mode', $thumbnailsMode);
1027
1028             try {
1029                 $conf->write($loginManager->isLoggedIn());
1030                 $history->updateSettings();
1031                 invalidateCaches($conf->get('resource.page_cache'));
1032             }
1033             catch(Exception $e) {
1034                 error_log(
1035                     'ERROR while writing config file after configuration update.' . PHP_EOL .
1036                     $e->getMessage()
1037                 );
1038
1039                 // TODO: do not handle exceptions/errors in JS.
1040                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=configure\';</script>';
1041                 exit;
1042             }
1043             echo '<script>alert("'. t('Configuration was saved.') .'");document.location=\'?do=configure\';</script>';
1044             exit;
1045         }
1046         else // Show the configuration form.
1047         {
1048             $PAGE->assign('title', $conf->get('general.title'));
1049             $PAGE->assign('theme', $conf->get('resource.theme'));
1050             $PAGE->assign('theme_available', ThemeUtils::getThemes($conf->get('resource.raintpl_tpl')));
1051             list($continents, $cities) = generateTimeZoneData(
1052                 timezone_identifiers_list(),
1053                 $conf->get('general.timezone')
1054             );
1055             $PAGE->assign('continents', $continents);
1056             $PAGE->assign('cities', $cities);
1057             $PAGE->assign('private_links_default', $conf->get('privacy.default_private_links', false));
1058             $PAGE->assign('session_protection_disabled', $conf->get('security.session_protection_disabled', false));
1059             $PAGE->assign('enable_rss_permalinks', $conf->get('feed.rss_permalinks', false));
1060             $PAGE->assign('enable_update_check', $conf->get('updates.check_updates', true));
1061             $PAGE->assign('hide_public_links', $conf->get('privacy.hide_public_links', false));
1062             $PAGE->assign('api_enabled', $conf->get('api.enabled', true));
1063             $PAGE->assign('api_secret', $conf->get('api.secret'));
1064             $PAGE->assign('languages', Languages::getAvailableLanguages());
1065             $PAGE->assign('language', $conf->get('translation.language'));
1066             $PAGE->assign('gd_enabled', extension_loaded('gd'));
1067             $PAGE->assign('thumbnails_mode', $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE));
1068             $PAGE->assign('pagetitle', t('Configure') .' - '. $conf->get('general.title', 'Shaarli'));
1069             $PAGE->renderPage('configure');
1070             exit;
1071         }
1072     }
1073
1074     // -------- User wants to rename a tag or delete it
1075     if ($targetPage == Router::$PAGE_CHANGETAG)
1076     {
1077         if (empty($_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         $alteredLinks = $LINKSDB->renameTag(escape($_POST['fromtag']), escape($_POST['totag']));
1089         $LINKSDB->save($conf->get('resource.page_cache'));
1090         foreach ($alteredLinks as $link) {
1091             $history->updateLink($link);
1092         }
1093         $delete = empty($_POST['totag']);
1094         $redirect = $delete ? 'do=changetag' : 'searchtags='. urlencode(escape($_POST['totag']));
1095         $count = count($alteredLinks);
1096         $alert = $delete
1097             ? sprintf(t('The tag was removed from %d link.', 'The tag was removed from %d links.', $count), $count)
1098             : sprintf(t('The tag was renamed in %d link.', 'The tag was renamed in %d links.', $count), $count);
1099         echo '<script>alert("'. $alert .'");document.location=\'?'. $redirect .'\';</script>';
1100         exit;
1101     }
1102
1103     // -------- User wants to add a link without using the bookmarklet: Show form.
1104     if ($targetPage == Router::$PAGE_ADDLINK)
1105     {
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     {
1114         // Go away!
1115         if (! $sessionManager->checkToken($_POST['token'])) {
1116             die(t('Wrong token.'));
1117         }
1118
1119         // lf_id should only be present if the link exists.
1120         $id = isset($_POST['lf_id']) ? intval(escape($_POST['lf_id'])) : $LINKSDB->getNextId();
1121         // Linkdate is kept here to:
1122         //   - use the same permalink for notes as they're displayed when creating them
1123         //   - let users hack creation date of their posts
1124         //     See: https://shaarli.readthedocs.io/en/master/guides/various-hacks/#changing-the-timestamp-for-a-shaare
1125         $linkdate = escape($_POST['lf_linkdate']);
1126         if (isset($LINKSDB[$id])) {
1127             // Edit
1128             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1129             $updated = new DateTime();
1130             $shortUrl = $LINKSDB[$id]['shorturl'];
1131             $new = false;
1132         } else {
1133             // New link
1134             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1135             $updated = null;
1136             $shortUrl = link_small_hash($created, $id);
1137             $new = true;
1138         }
1139
1140         // Remove multiple spaces.
1141         $tags = trim(preg_replace('/\s\s+/', ' ', $_POST['lf_tags']));
1142         // Remove first '-' char in tags.
1143         $tags = preg_replace('/(^| )\-/', '$1', $tags);
1144         // Remove duplicates.
1145         $tags = implode(' ', array_unique(explode(' ', $tags)));
1146
1147         if (empty(trim($_POST['lf_url']))) {
1148             $_POST['lf_url'] = '?' . smallHash($linkdate . $id);
1149         }
1150         $url = whitelist_protocols(trim($_POST['lf_url']), $conf->get('security.allowed_protocols'));
1151
1152         $link = array(
1153             'id' => $id,
1154             'title' => trim($_POST['lf_title']),
1155             'url' => $url,
1156             'description' => $_POST['lf_description'],
1157             'private' => (isset($_POST['lf_private']) ? 1 : 0),
1158             'created' => $created,
1159             'updated' => $updated,
1160             'tags' => str_replace(',', ' ', $tags),
1161             'shorturl' => $shortUrl,
1162         );
1163
1164         // If title is empty, use the URL as title.
1165         if ($link['title'] == '') {
1166             $link['title'] = $link['url'];
1167         }
1168
1169         if ($conf->get('thumbnails.mode', Thumbnailer::MODE_NONE) !== Thumbnailer::MODE_NONE) {
1170             $thumbnailer = new Thumbnailer($conf);
1171             $link['thumbnail'] = $thumbnailer->get($url);
1172         }
1173
1174         $pluginManager->executeHooks('save_link', $link);
1175
1176         $LINKSDB[$id] = $link;
1177         $LINKSDB->save($conf->get('resource.page_cache'));
1178         if ($new) {
1179             $history->addLink($link);
1180         } else {
1181             $history->updateLink($link);
1182         }
1183
1184         // If we are called from the bookmarklet, we must close the popup:
1185         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1186             echo '<script>self.close();</script>';
1187             exit;
1188         }
1189
1190         $returnurl = !empty($_POST['returnurl']) ? $_POST['returnurl'] : '?';
1191         $location = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1192         // Scroll to the link which has been edited.
1193         $location .= '#' . $link['shorturl'];
1194         // After saving the link, redirect to the page the user was on.
1195         header('Location: '. $location);
1196         exit;
1197     }
1198
1199     // -------- User clicked the "Cancel" button when editing a link.
1200     if (isset($_POST['cancel_edit']))
1201     {
1202         $id = isset($_POST['lf_id']) ? (int) escape($_POST['lf_id']) : false;
1203         if (! isset($LINKSDB[$id])) {
1204             header('Location: ?');
1205         }
1206         // If we are called from the bookmarklet, we must close the popup:
1207         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1208         $link = $LINKSDB[$id];
1209         $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
1210         // Scroll to the link which has been edited.
1211         $returnurl .= '#'. $link['shorturl'];
1212         $returnurl = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1213         header('Location: '.$returnurl); // After canceling, redirect to the page the user was on.
1214         exit;
1215     }
1216
1217     // -------- User clicked the "Delete" button when editing a link: Delete link from database.
1218     if ($targetPage == Router::$PAGE_DELETELINK)
1219     {
1220         if (! $sessionManager->checkToken($_GET['token'])) {
1221             die(t('Wrong token.'));
1222         }
1223
1224         $ids = trim($_GET['lf_linkdate']);
1225         if (strpos($ids, ' ') !== false) {
1226             // multiple, space-separated ids provided
1227             $ids = array_values(array_filter(preg_split('/\s+/', escape($ids))));
1228         } else {
1229             // only a single id provided
1230             $ids = [$ids];
1231         }
1232         // assert at least one id is given
1233         if(!count($ids)){
1234             die('no id provided');
1235         }
1236         foreach ($ids as $id) {
1237             $id = (int) escape($id);
1238             $link = $LINKSDB[$id];
1239             $pluginManager->executeHooks('delete_link', $link);
1240             unset($LINKSDB[$id]);
1241         }
1242         $LINKSDB->save($conf->get('resource.page_cache')); // save to disk
1243         $history->deleteLink($link);
1244
1245         // If we are called from the bookmarklet, we must close the popup:
1246         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1247
1248         $location = '?';
1249         if (isset($_SERVER['HTTP_REFERER'])) {
1250             // Don't redirect to where we were previously if it was a permalink or an edit_link, because it would 404.
1251             $location = generateLocation(
1252                     $_SERVER['HTTP_REFERER'],
1253                     $_SERVER['HTTP_HOST'],
1254                     ['delete_link', 'edit_link', $link['shorturl']]
1255             );
1256         }
1257
1258         header('Location: ' . $location); // After deleting the link, redirect to appropriate location
1259         exit;
1260     }
1261
1262     // -------- User clicked the "EDIT" button on a link: Display link edit form.
1263     if (isset($_GET['edit_link']))
1264     {
1265         $id = (int) escape($_GET['edit_link']);
1266         $link = $LINKSDB[$id];  // Read database
1267         if (!$link) { header('Location: ?'); exit; } // Link not found in database.
1268         $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1269         $data = array(
1270             'link' => $link,
1271             'link_is_new' => false,
1272             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1273             'tags' => $LINKSDB->linksCountPerTag(),
1274         );
1275         $pluginManager->executeHooks('render_editlink', $data);
1276
1277         foreach ($data as $key => $value) {
1278             $PAGE->assign($key, $value);
1279         }
1280
1281         $PAGE->assign('pagetitle', t('Edit') .' '. t('Shaare') .' - '. $conf->get('general.title', 'Shaarli'));
1282         $PAGE->renderPage('editlink');
1283         exit;
1284     }
1285
1286     // -------- User want to post a new link: Display link edit form.
1287     if (isset($_GET['post'])) {
1288         $url = cleanup_url($_GET['post']);
1289
1290         $link_is_new = false;
1291         // Check if URL is not already in database (in this case, we will edit the existing link)
1292         $link = $LINKSDB->getLinkFromUrl($url);
1293         if (! $link)
1294         {
1295             $link_is_new = true;
1296             $linkdate = strval(date(LinkDB::LINK_DATE_FORMAT));
1297             // Get title if it was provided in URL (by the bookmarklet).
1298             $title = empty($_GET['title']) ? '' : escape($_GET['title']);
1299             // Get description if it was provided in URL (by the bookmarklet). [Bronco added that]
1300             $description = empty($_GET['description']) ? '' : escape($_GET['description']);
1301             $tags = empty($_GET['tags']) ? '' : escape($_GET['tags']);
1302             $private = !empty($_GET['private']) && $_GET['private'] === "1" ? 1 : 0;
1303             // If this is an HTTP(S) link, we try go get the page to extract the title (otherwise we will to straight to the edit form.)
1304             if (empty($title) && strpos(get_url_scheme($url), 'http') !== false) {
1305                 // Short timeout to keep the application responsive
1306                 // The callback will fill $charset and $title with data from the downloaded page.
1307                 get_http_response(
1308                     $url,
1309                     $conf->get('general.download_timeout', 30),
1310                     $conf->get('general.download_max_size', 4194304),
1311                     get_curl_download_callback($charset, $title)
1312                 );
1313                 if (! empty($title) && strtolower($charset) != 'utf-8') {
1314                     $title = mb_convert_encoding($title, 'utf-8', $charset);
1315                 }
1316             }
1317
1318             if ($url == '') {
1319                 $url = '?' . smallHash($linkdate . $LINKSDB->getNextId());
1320                 $title = $conf->get('general.default_note_title', t('Note: '));
1321             }
1322             $url = escape($url);
1323             $title = escape($title);
1324
1325             $link = array(
1326                 'linkdate' => $linkdate,
1327                 'title' => $title,
1328                 'url' => $url,
1329                 'description' => $description,
1330                 'tags' => $tags,
1331                 'private' => $private,
1332             );
1333         } else {
1334             $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1335         }
1336
1337         $data = array(
1338             'link' => $link,
1339             'link_is_new' => $link_is_new,
1340             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1341             'source' => (isset($_GET['source']) ? $_GET['source'] : ''),
1342             'tags' => $LINKSDB->linksCountPerTag(),
1343             'default_private_links' => $conf->get('privacy.default_private_links', false),
1344         );
1345         $pluginManager->executeHooks('render_editlink', $data);
1346
1347         foreach ($data as $key => $value) {
1348             $PAGE->assign($key, $value);
1349         }
1350
1351         $PAGE->assign('pagetitle', t('Shaare') .' - '. $conf->get('general.title', 'Shaarli'));
1352         $PAGE->renderPage('editlink');
1353         exit;
1354     }
1355
1356     if ($targetPage == Router::$PAGE_EXPORT) {
1357         // Export links as a Netscape Bookmarks file
1358
1359         if (empty($_GET['selection'])) {
1360             $PAGE->assign('pagetitle', t('Export') .' - '. $conf->get('general.title', 'Shaarli'));
1361             $PAGE->renderPage('export');
1362             exit;
1363         }
1364
1365         // export as bookmarks_(all|private|public)_YYYYmmdd_HHMMSS.html
1366         $selection = $_GET['selection'];
1367         if (isset($_GET['prepend_note_url'])) {
1368             $prependNoteUrl = $_GET['prepend_note_url'];
1369         } else {
1370             $prependNoteUrl = false;
1371         }
1372
1373         try {
1374             $PAGE->assign(
1375                 'links',
1376                 NetscapeBookmarkUtils::filterAndFormat(
1377                     $LINKSDB,
1378                     $selection,
1379                     $prependNoteUrl,
1380                     index_url($_SERVER)
1381                 )
1382             );
1383         } catch (Exception $exc) {
1384             header('Content-Type: text/plain; charset=utf-8');
1385             echo $exc->getMessage();
1386             exit;
1387         }
1388         $now = new DateTime();
1389         header('Content-Type: text/html; charset=utf-8');
1390         header(
1391             'Content-disposition: attachment; filename=bookmarks_'
1392            .$selection.'_'.$now->format(LinkDB::LINK_DATE_FORMAT).'.html'
1393         );
1394         $PAGE->assign('date', $now->format(DateTime::RFC822));
1395         $PAGE->assign('eol', PHP_EOL);
1396         $PAGE->assign('selection', $selection);
1397         $PAGE->renderPage('export.bookmarks');
1398         exit;
1399     }
1400
1401     if ($targetPage == Router::$PAGE_IMPORT) {
1402         // Upload a Netscape bookmark dump to import its contents
1403
1404         if (! isset($_POST['token']) || ! isset($_FILES['filetoupload'])) {
1405             // Show import dialog
1406             $PAGE->assign(
1407                 'maxfilesize',
1408                 get_max_upload_size(
1409                     ini_get('post_max_size'),
1410                     ini_get('upload_max_filesize'),
1411                     false
1412                 )
1413             );
1414             $PAGE->assign(
1415                 'maxfilesizeHuman',
1416                 get_max_upload_size(
1417                     ini_get('post_max_size'),
1418                     ini_get('upload_max_filesize'),
1419                     true
1420                 )
1421             );
1422             $PAGE->assign('pagetitle', t('Import') .' - '. $conf->get('general.title', 'Shaarli'));
1423             $PAGE->renderPage('import');
1424             exit;
1425         }
1426
1427         // Import bookmarks from an uploaded file
1428         if (isset($_FILES['filetoupload']['size']) && $_FILES['filetoupload']['size'] == 0) {
1429             // The file is too big or some form field may be missing.
1430             $msg = sprintf(
1431                 t(
1432                     'The file you are trying to upload is probably bigger than what this webserver can accept'
1433                     .' (%s). Please upload in smaller chunks.'
1434                 ),
1435                 get_max_upload_size(ini_get('post_max_size'), ini_get('upload_max_filesize'))
1436             );
1437             echo '<script>alert("'. $msg .'");document.location=\'?do='.Router::$PAGE_IMPORT .'\';</script>';
1438             exit;
1439         }
1440         if (! $sessionManager->checkToken($_POST['token'])) {
1441             die('Wrong token.');
1442         }
1443         $status = NetscapeBookmarkUtils::import(
1444             $_POST,
1445             $_FILES,
1446             $LINKSDB,
1447             $conf,
1448             $history
1449         );
1450         echo '<script>alert("'.$status.'");document.location=\'?do='
1451              .Router::$PAGE_IMPORT .'\';</script>';
1452         exit;
1453     }
1454
1455     // Plugin administration page
1456     if ($targetPage == Router::$PAGE_PLUGINSADMIN) {
1457         $pluginMeta = $pluginManager->getPluginsMeta();
1458
1459         // Split plugins into 2 arrays: ordered enabled plugins and disabled.
1460         $enabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] !== false; });
1461         // Load parameters.
1462         $enabledPlugins = load_plugin_parameter_values($enabledPlugins, $conf->get('plugins', array()));
1463         uasort(
1464             $enabledPlugins,
1465             function($a, $b) { return $a['order'] - $b['order']; }
1466         );
1467         $disabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] === false; });
1468
1469         $PAGE->assign('enabledPlugins', $enabledPlugins);
1470         $PAGE->assign('disabledPlugins', $disabledPlugins);
1471         $PAGE->assign('pagetitle', t('Plugin administration') .' - '. $conf->get('general.title', 'Shaarli'));
1472         $PAGE->renderPage('pluginsadmin');
1473         exit;
1474     }
1475
1476     // Plugin administration form action
1477     if ($targetPage == Router::$PAGE_SAVE_PLUGINSADMIN) {
1478         try {
1479             if (isset($_POST['parameters_form'])) {
1480                 unset($_POST['parameters_form']);
1481                 foreach ($_POST as $param => $value) {
1482                     $conf->set('plugins.'. $param, escape($value));
1483                 }
1484             }
1485             else {
1486                 $conf->set('general.enabled_plugins', save_plugin_config($_POST));
1487             }
1488             $conf->write($loginManager->isLoggedIn());
1489             $history->updateSettings();
1490         }
1491         catch (Exception $e) {
1492             error_log(
1493                 'ERROR while saving plugin configuration:.' . PHP_EOL .
1494                 $e->getMessage()
1495             );
1496
1497             // TODO: do not handle exceptions/errors in JS.
1498             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do='. Router::$PAGE_PLUGINSADMIN .'\';</script>';
1499             exit;
1500         }
1501         header('Location: ?do='. Router::$PAGE_PLUGINSADMIN);
1502         exit;
1503     }
1504
1505     // Get a fresh token
1506     if ($targetPage == Router::$GET_TOKEN) {
1507         header('Content-Type:text/plain');
1508         echo $sessionManager->generateToken($conf);
1509         exit;
1510     }
1511
1512     // -------- Thumbnails Update
1513     if ($targetPage == Router::$PAGE_THUMBS_UPDATE) {
1514         $ids = [];
1515         foreach ($LINKSDB as $link) {
1516             // A note or not HTTP(S)
1517             if ($link['url'][0] === '?' || ! startsWith(strtolower($link['url']), 'http')) {
1518                 continue;
1519             }
1520             $ids[] = $link['id'];
1521         }
1522         $PAGE->assign('ids', $ids);
1523         $PAGE->assign('pagetitle', t('Thumbnails update') .' - '. $conf->get('general.title', 'Shaarli'));
1524         $PAGE->renderPage('thumbnails');
1525         exit;
1526     }
1527
1528     // -------- Single Thumbnail Update
1529     if ($targetPage == Router::$AJAX_THUMB_UPDATE) {
1530         if (! isset($_POST['id']) || ! ctype_digit($_POST['id'])) {
1531             http_response_code(400);
1532             exit;
1533         }
1534         $id = (int) $_POST['id'];
1535         if (empty($LINKSDB[$id])) {
1536             http_response_code(404);
1537             exit;
1538         }
1539         $thumbnailer = new Thumbnailer($conf);
1540         $link = $LINKSDB[$id];
1541         $link['thumbnail'] = $thumbnailer->get($link['url']);
1542         $LINKSDB[$id] = $link;
1543         $LINKSDB->save($conf->get('resource.page_cache'));
1544
1545         echo json_encode($link);
1546         exit;
1547     }
1548
1549     // -------- Otherwise, simply display search form and links:
1550     showLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
1551     exit;
1552 }
1553
1554 /**
1555  * Template for the list of links (<div id="linklist">)
1556  * This function fills all the necessary fields in the $PAGE for the template 'linklist.html'
1557  *
1558  * @param pageBuilder   $PAGE          pageBuilder instance.
1559  * @param LinkDB        $LINKSDB       LinkDB instance.
1560  * @param ConfigManager $conf          Configuration Manager instance.
1561  * @param PluginManager $pluginManager Plugin Manager instance.
1562  * @param LoginManager  $loginManager  LoginManager instance
1563  */
1564 function buildLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager)
1565 {
1566     // Used in templates
1567     if (isset($_GET['searchtags'])) {
1568         if (! empty($_GET['searchtags'])) {
1569             $searchtags = escape(normalize_spaces($_GET['searchtags']));
1570         } else {
1571             $searchtags = false;
1572         }
1573     } else {
1574         $searchtags = '';
1575     }
1576     $searchterm = !empty($_GET['searchterm']) ? escape(normalize_spaces($_GET['searchterm'])) : '';
1577
1578     // Smallhash filter
1579     if (! empty($_SERVER['QUERY_STRING'])
1580         && preg_match('/^[a-zA-Z0-9-_@]{6}($|&|#)/', $_SERVER['QUERY_STRING'])) {
1581         try {
1582             $linksToDisplay = $LINKSDB->filterHash($_SERVER['QUERY_STRING']);
1583         } catch (LinkNotFoundException $e) {
1584             $PAGE->render404($e->getMessage());
1585             exit;
1586         }
1587     } else {
1588         // Filter links according search parameters.
1589         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
1590         $request = [
1591             'searchtags' => $searchtags,
1592             'searchterm' => $searchterm,
1593         ];
1594         $linksToDisplay = $LINKSDB->filterSearch($request, false, $visibility, !empty($_SESSION['untaggedonly']));
1595     }
1596
1597     // ---- Handle paging.
1598     $keys = array();
1599     foreach ($linksToDisplay as $key => $value) {
1600         $keys[] = $key;
1601     }
1602
1603     // Select articles according to paging.
1604     $pagecount = ceil(count($keys) / $_SESSION['LINKS_PER_PAGE']);
1605     $pagecount = $pagecount == 0 ? 1 : $pagecount;
1606     $page= empty($_GET['page']) ? 1 : intval($_GET['page']);
1607     $page = $page < 1 ? 1 : $page;
1608     $page = $page > $pagecount ? $pagecount : $page;
1609     // Start index.
1610     $i = ($page-1) * $_SESSION['LINKS_PER_PAGE'];
1611     $end = $i + $_SESSION['LINKS_PER_PAGE'];
1612
1613     $thumbnailsEnabled = $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE) !== Thumbnailer::MODE_NONE;
1614     if ($thumbnailsEnabled) {
1615         $thumbnailer = new Thumbnailer($conf);
1616     }
1617
1618     $linkDisp = array();
1619     while ($i<$end && $i<count($keys))
1620     {
1621         $link = $linksToDisplay[$keys[$i]];
1622         $link['description'] = format_description(
1623             $link['description'],
1624             $conf->get('redirector.url'),
1625             $conf->get('redirector.encode_url')
1626         );
1627         $classLi =  ($i % 2) != 0 ? '' : 'publicLinkHightLight';
1628         $link['class'] = $link['private'] == 0 ? $classLi : 'private';
1629         $link['timestamp'] = $link['created']->getTimestamp();
1630         if (! empty($link['updated'])) {
1631             $link['updated_timestamp'] = $link['updated']->getTimestamp();
1632         } else {
1633             $link['updated_timestamp'] = '';
1634         }
1635         $taglist = preg_split('/\s+/', $link['tags'], -1, PREG_SPLIT_NO_EMPTY);
1636         uasort($taglist, 'strcasecmp');
1637         $link['taglist'] = $taglist;
1638
1639         // Thumbnails enabled, not a note,
1640         // and (never retrieved yet or no valid cache file)
1641         if ($thumbnailsEnabled && $link['url'][0] != '?'
1642             && (! isset($link['thumbnail']) || ($link['thumbnail'] !== false && ! is_file($link['thumbnail'])))
1643         ) {
1644             $elem = $LINKSDB[$keys[$i]];
1645             $elem['thumbnail'] = $thumbnailer->get($link['url']);
1646             $LINKSDB[$keys[$i]] = $elem;
1647             $updateDB = true;
1648             $link['thumbnail'] = $elem['thumbnail'];
1649         }
1650
1651         // Check for both signs of a note: starting with ? and 7 chars long.
1652         if ($link['url'][0] === '?' && strlen($link['url']) === 7) {
1653             $link['url'] = index_url($_SERVER) . $link['url'];
1654         }
1655
1656         $linkDisp[$keys[$i]] = $link;
1657         $i++;
1658     }
1659
1660     // If we retrieved new thumbnails, we update the database.
1661     if (!empty($updateDB)) {
1662         $LINKSDB->save($conf->get('resource.page_cache'));
1663     }
1664
1665     // Compute paging navigation
1666     $searchtagsUrl = $searchtags === '' ? '' : '&searchtags=' . urlencode($searchtags);
1667     $searchtermUrl = empty($searchterm) ? '' : '&searchterm=' . urlencode($searchterm);
1668     $previous_page_url = '';
1669     if ($i != count($keys)) {
1670         $previous_page_url = '?page=' . ($page+1) . $searchtermUrl . $searchtagsUrl;
1671     }
1672     $next_page_url='';
1673     if ($page>1) {
1674         $next_page_url = '?page=' . ($page-1) . $searchtermUrl . $searchtagsUrl;
1675     }
1676
1677     // Fill all template fields.
1678     $data = array(
1679         'previous_page_url' => $previous_page_url,
1680         'next_page_url' => $next_page_url,
1681         'page_current' => $page,
1682         'page_max' => $pagecount,
1683         'result_count' => count($linksToDisplay),
1684         'search_term' => $searchterm,
1685         'search_tags' => $searchtags,
1686         'visibility' => ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '',
1687         'redirector' => $conf->get('redirector.url'),  // Optional redirector URL.
1688         'links' => $linkDisp,
1689     );
1690
1691     // If there is only a single link, we change on-the-fly the title of the page.
1692     if (count($linksToDisplay) == 1) {
1693         $data['pagetitle'] = $linksToDisplay[$keys[0]]['title'] .' - '. $conf->get('general.title');
1694     } elseif (! empty($searchterm) || ! empty($searchtags)) {
1695         $data['pagetitle'] = t('Search: ');
1696         $data['pagetitle'] .= ! empty($searchterm) ? $searchterm .' ' : '';
1697         $bracketWrap = function ($tag) {
1698             return '['. $tag .']';
1699         };
1700         $data['pagetitle'] .= ! empty($searchtags)
1701             ? implode(' ', array_map($bracketWrap, preg_split('/\s+/', $searchtags))).' '
1702             : '';
1703         $data['pagetitle'] .= '- '. $conf->get('general.title');
1704     }
1705
1706     $pluginManager->executeHooks('render_linklist', $data, array('loggedin' => $loginManager->isLoggedIn()));
1707
1708     foreach ($data as $key => $value) {
1709         $PAGE->assign($key, $value);
1710     }
1711
1712     return;
1713 }
1714
1715 /**
1716  * Installation
1717  * This function should NEVER be called if the file data/config.php exists.
1718  *
1719  * @param ConfigManager  $conf           Configuration Manager instance.
1720  * @param SessionManager $sessionManager SessionManager instance
1721  * @param LoginManager   $loginManager   LoginManager instance
1722  */
1723 function install($conf, $sessionManager, $loginManager) {
1724     // On free.fr host, make sure the /sessions directory exists, otherwise login will not work.
1725     if (endsWith($_SERVER['HTTP_HOST'],'.free.fr') && !is_dir($_SERVER['DOCUMENT_ROOT'].'/sessions')) mkdir($_SERVER['DOCUMENT_ROOT'].'/sessions',0705);
1726
1727
1728     // This part makes sure sessions works correctly.
1729     // (Because on some hosts, session.save_path may not be set correctly,
1730     // or we may not have write access to it.)
1731     if (isset($_GET['test_session']) && ( !isset($_SESSION) || !isset($_SESSION['session_tested']) || $_SESSION['session_tested']!='Working'))
1732     {
1733         // Step 2: Check if data in session is correct.
1734         $msg = t(
1735             '<pre>Sessions do not seem to work correctly on your server.<br>'.
1736             'Make sure the variable "session.save_path" is set correctly in your PHP config, '.
1737             'and that you have write access to it.<br>'.
1738             'It currently points to %s.<br>'.
1739             'On some browsers, accessing your server via a hostname like \'localhost\' '.
1740             'or any custom hostname without a dot causes cookie storage to fail. '.
1741             'We recommend accessing your server via it\'s IP address or Fully Qualified Domain Name.<br>'
1742         );
1743         $msg = sprintf($msg, session_save_path());
1744         echo $msg;
1745         echo '<br><a href="?">'. t('Click to try again.') .'</a></pre>';
1746         die;
1747     }
1748     if (!isset($_SESSION['session_tested']))
1749     {   // Step 1 : Try to store data in session and reload page.
1750         $_SESSION['session_tested'] = 'Working';  // Try to set a variable in session.
1751         header('Location: '.index_url($_SERVER).'?test_session');  // Redirect to check stored data.
1752     }
1753     if (isset($_GET['test_session']))
1754     {   // Step 3: Sessions are OK. Remove test parameter from URL.
1755         header('Location: '.index_url($_SERVER));
1756     }
1757
1758
1759     if (!empty($_POST['setlogin']) && !empty($_POST['setpassword']))
1760     {
1761         $tz = 'UTC';
1762         if (!empty($_POST['continent']) && !empty($_POST['city'])
1763             && isTimeZoneValid($_POST['continent'], $_POST['city'])
1764         ) {
1765             $tz = $_POST['continent'].'/'.$_POST['city'];
1766         }
1767         $conf->set('general.timezone', $tz);
1768         $login = $_POST['setlogin'];
1769         $conf->set('credentials.login', $login);
1770         $salt = sha1(uniqid('', true) .'_'. mt_rand());
1771         $conf->set('credentials.salt', $salt);
1772         $conf->set('credentials.hash', sha1($_POST['setpassword'] . $login . $salt));
1773         if (!empty($_POST['title'])) {
1774             $conf->set('general.title', escape($_POST['title']));
1775         } else {
1776             $conf->set('general.title', 'Shared links on '.escape(index_url($_SERVER)));
1777         }
1778         $conf->set('translation.language', escape($_POST['language']));
1779         $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1780         $conf->set('api.enabled', !empty($_POST['enableApi']));
1781         $conf->set(
1782             'api.secret',
1783             generate_api_secret(
1784                 $conf->get('credentials.login'),
1785                 $conf->get('credentials.salt')
1786             )
1787         );
1788         try {
1789             // Everything is ok, let's create config file.
1790             $conf->write($loginManager->isLoggedIn());
1791         }
1792         catch(Exception $e) {
1793             error_log(
1794                     'ERROR while writing config file after installation.' . PHP_EOL .
1795                     $e->getMessage()
1796                 );
1797
1798             // TODO: do not handle exceptions/errors in JS.
1799             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?\';</script>';
1800             exit;
1801         }
1802         echo '<script>alert("Shaarli is now configured. Please enter your login/password and start shaaring your links!");document.location=\'?do=login\';</script>';
1803         exit;
1804     }
1805
1806     $PAGE = new PageBuilder($conf, $_SESSION, null, $sessionManager->generateToken());
1807     list($continents, $cities) = generateTimeZoneData(timezone_identifiers_list(), date_default_timezone_get());
1808     $PAGE->assign('continents', $continents);
1809     $PAGE->assign('cities', $cities);
1810     $PAGE->assign('languages', Languages::getAvailableLanguages());
1811     $PAGE->renderPage('install');
1812     exit;
1813 }
1814
1815 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=dailyrss')) { showDailyRSS($conf); exit; }
1816 if (!isset($_SESSION['LINKS_PER_PAGE'])) {
1817     $_SESSION['LINKS_PER_PAGE'] = $conf->get('general.links_per_page', 20);
1818 }
1819
1820 try {
1821     $history = new History($conf->get('resource.history'));
1822 } catch(Exception $e) {
1823     die($e->getMessage());
1824 }
1825
1826 $linkDb = new LinkDB(
1827     $conf->get('resource.datastore'),
1828     $loginManager->isLoggedIn(),
1829     $conf->get('privacy.hide_public_links'),
1830     $conf->get('redirector.url'),
1831     $conf->get('redirector.encode_url')
1832 );
1833
1834 $container = new \Slim\Container();
1835 $container['conf'] = $conf;
1836 $container['plugins'] = $pluginManager;
1837 $container['history'] = $history;
1838 $app = new \Slim\App($container);
1839
1840 // REST API routes
1841 $app->group('/api/v1', function() {
1842     $this->get('/info', '\Shaarli\Api\Controllers\Info:getInfo')->setName('getInfo');
1843     $this->get('/links', '\Shaarli\Api\Controllers\Links:getLinks')->setName('getLinks');
1844     $this->get('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:getLink')->setName('getLink');
1845     $this->post('/links', '\Shaarli\Api\Controllers\Links:postLink')->setName('postLink');
1846     $this->put('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:putLink')->setName('putLink');
1847     $this->delete('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:deleteLink')->setName('deleteLink');
1848
1849     $this->get('/tags', '\Shaarli\Api\Controllers\Tags:getTags')->setName('getTags');
1850     $this->get('/tags/{tagName:[\w]+}', '\Shaarli\Api\Controllers\Tags:getTag')->setName('getTag');
1851     $this->put('/tags/{tagName:[\w]+}', '\Shaarli\Api\Controllers\Tags:putTag')->setName('putTag');
1852     $this->delete('/tags/{tagName:[\w]+}', '\Shaarli\Api\Controllers\Tags:deleteTag')->setName('deleteTag');
1853
1854     $this->get('/history', '\Shaarli\Api\Controllers\History:getHistory')->setName('getHistory');
1855 })->add('\Shaarli\Api\ApiMiddleware');
1856
1857 $response = $app->run(true);
1858 // Hack to make Slim and Shaarli router work together:
1859 // If a Slim route isn't found and NOT API call, we call renderPage().
1860 if ($response->getStatusCode() == 404 && strpos($_SERVER['REQUEST_URI'], '/api/v1') === false) {
1861     // We use UTF-8 for proper international characters handling.
1862     header('Content-Type: text/html; charset=utf-8');
1863     renderPage($conf, $pluginManager, $linkDb, $history, $sessionManager, $loginManager);
1864 } else {
1865     $app->respond($response);
1866 }