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
  15 // Set 'UTC' as the default timezone if it is not defined in php.ini
  16 // See http://php.net/manual/en/datetime.configuration.php#ini.date.timezone
  17 if (date_default_timezone_get() == '') {
  18     date_default_timezone_set('UTC');
  19 }
  20
  21 /*
  22  * PHP configuration
  23  */
  24
  25 // http://server.com/x/shaarli --> /shaarli/
  26 define('WEB_PATH', substr($_SERVER['REQUEST_URI'], 0, 1+strrpos($_SERVER['REQUEST_URI'], '/', 0)));
  27
  28 // High execution time in case of problematic imports/exports.
  29 ini_set('max_input_time', '60');
  30
  31 // Try to set max upload file size and read
  32 ini_set('memory_limit', '128M');
  33 ini_set('post_max_size', '16M');
  34 ini_set('upload_max_filesize', '16M');
  35
  36 // See all error except warnings
  37 error_reporting(E_ALL^E_WARNING);
  38
  39 // 3rd-party libraries
  40 if (! file_exists(__DIR__ . '/vendor/autoload.php')) {
  41     header('Content-Type: text/plain; charset=utf-8');
  42     echo "Error: missing Composer configuration\n\n"
  43         ."If you installed Shaarli through Git or using the development branch,\n"
  44         ."please refer to the installation documentation to install PHP"
  45         ." dependencies using Composer:\n"
  46         ."- https://shaarli.readthedocs.io/en/master/Server-configuration/\n"
  47         ."- https://shaarli.readthedocs.io/en/master/Download-and-Installation/";
  48     exit;
  49 }
  50 require_once 'inc/rain.tpl.class.php';
  51 require_once __DIR__ . '/vendor/autoload.php';
  52
  53 // Shaarli library
  54 require_once 'application/bookmark/LinkUtils.php';
  55 require_once 'application/config/ConfigPlugin.php';
  56 require_once 'application/feed/Cache.php';
  57 require_once 'application/http/HttpUtils.php';
  58 require_once 'application/http/UrlUtils.php';
  59 require_once 'application/updater/UpdaterUtils.php';
  60 require_once 'application/FileUtils.php';
  61 require_once 'application/TimeZone.php';
  62 require_once 'application/Utils.php';
  63
  64 use \Shaarli\ApplicationUtils;
  65 use Shaarli\Bookmark\BookmarkServiceInterface;
  66 use \Shaarli\Bookmark\Exception\BookmarkNotFoundException;
  67 use Shaarli\Bookmark\Bookmark;
  68 use Shaarli\Bookmark\BookmarkFilter;
  69 use Shaarli\Bookmark\BookmarkFileService;
  70 use \Shaarli\Config\ConfigManager;
  71 use \Shaarli\Feed\CachedPage;
  72 use \Shaarli\Feed\FeedBuilder;
  73 use Shaarli\Formatter\BookmarkMarkdownFormatter;
  74 use Shaarli\Formatter\FormatterFactory;
  75 use \Shaarli\History;
  76 use \Shaarli\Languages;
  77 use \Shaarli\Netscape\NetscapeBookmarkUtils;
  78 use \Shaarli\Plugin\PluginManager;
  79 use \Shaarli\Render\PageBuilder;
  80 use \Shaarli\Render\ThemeUtils;
  81 use \Shaarli\Router;
  82 use \Shaarli\Security\LoginManager;
  83 use \Shaarli\Security\SessionManager;
  84 use \Shaarli\Thumbnailer;
  85 use \Shaarli\Updater\Updater;
  86 use \Shaarli\Updater\UpdaterUtils;
  87
  88 // Ensure the PHP version is supported
  89 try {
  90     ApplicationUtils::checkPHPVersion('7.1', PHP_VERSION);
  91 } catch (Exception $exc) {
  92     header('Content-Type: text/plain; charset=utf-8');
  93     echo $exc->getMessage();
  94     exit;
  95 }
  96
  97 define('SHAARLI_VERSION', ApplicationUtils::getVersion(__DIR__ .'/'. ApplicationUtils::$VERSION_FILE));
  98
  99 // Force cookie path (but do not change lifetime)
 100 $cookie = session_get_cookie_params();
 101 $cookiedir = '';
 102 if (dirname($_SERVER['SCRIPT_NAME']) != '/') {
 103     $cookiedir = dirname($_SERVER["SCRIPT_NAME"]).'/';
 104 }
 105 // Set default cookie expiration and path.
 106 session_set_cookie_params($cookie['lifetime'], $cookiedir, $_SERVER['SERVER_NAME']);
 107 // Set session parameters on server side.
 108 // Use cookies to store session.
 109 ini_set('session.use_cookies', 1);
 110 // Force cookies for session (phpsessionID forbidden in URL).
 111 ini_set('session.use_only_cookies', 1);
 112 // Prevent PHP form using sessionID in URL if cookies are disabled.
 113 ini_set('session.use_trans_sid', false);
 114
 115 session_name('shaarli');
 116 // Start session if needed (Some server auto-start sessions).
 117 if (session_status() == PHP_SESSION_NONE) {
 118     session_start();
 119 }
 120
 121 // Regenerate session ID if invalid or not defined in cookie.
 122 if (isset($_COOKIE['shaarli']) && !SessionManager::checkId($_COOKIE['shaarli'])) {
 123     session_regenerate_id(true);
 124     $_COOKIE['shaarli'] = session_id();
 125 }
 126
 127 $conf = new ConfigManager();
 128
 129 // In dev mode, throw exception on any warning
 130 if ($conf->get('dev.debug', false)) {
 131     // See all errors (for debugging only)
 132     error_reporting(-1);
 133
 134     set_error_handler(function($errno, $errstr, $errfile, $errline, array $errcontext) {
 135         throw new ErrorException($errstr, 0, $errno, $errfile, $errline);
 136     });
 137 }
 138
 139 $sessionManager = new SessionManager($_SESSION, $conf);
 140 $loginManager = new LoginManager($conf, $sessionManager);
 141 $loginManager->generateStaySignedInToken($_SERVER['REMOTE_ADDR']);
 142 $clientIpId = client_ip_id($_SERVER);
 143
 144 // LC_MESSAGES isn't defined without php-intl, in this case use LC_COLLATE locale instead.
 145 if (! defined('LC_MESSAGES')) {
 146     define('LC_MESSAGES', LC_COLLATE);
 147 }
 148
 149 // Sniff browser language and set date format accordingly.
 150 if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
 151     autoLocale($_SERVER['HTTP_ACCEPT_LANGUAGE']);
 152 }
 153
 154 new Languages(setlocale(LC_MESSAGES, 0), $conf);
 155
 156 $conf->setEmpty('general.timezone', date_default_timezone_get());
 157 $conf->setEmpty('general.title', t('Shared bookmarks on '). escape(index_url($_SERVER)));
 158 RainTPL::$tpl_dir = $conf->get('resource.raintpl_tpl').'/'.$conf->get('resource.theme').'/'; // template directory
 159 RainTPL::$cache_dir = $conf->get('resource.raintpl_tmp'); // cache directory
 160
 161 $pluginManager = new PluginManager($conf);
 162 $pluginManager->load($conf->get('general.enabled_plugins'));
 163
 164 date_default_timezone_set($conf->get('general.timezone', 'UTC'));
 165
 166 ob_start();  // Output buffering for the page cache.
 167
 168 // Prevent caching on client side or proxy: (yes, it's ugly)
 169 header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
 170 header("Cache-Control: no-store, no-cache, must-revalidate");
 171 header("Cache-Control: post-check=0, pre-check=0", false);
 172 header("Pragma: no-cache");
 173
 174 if (! is_file($conf->getConfigFileExt())) {
 175     // Ensure Shaarli has proper access to its resources
 176     $errors = ApplicationUtils::checkResourcePermissions($conf);
 177
 178     if ($errors != array()) {
 179         $message = '<p>'. t('Insufficient permissions:') .'</p><ul>';
 180
 181         foreach ($errors as $error) {
 182             $message .= '<li>'.$error.'</li>';
 183         }
 184         $message .= '</ul>';
 185
 186         header('Content-Type: text/html; charset=utf-8');
 187         echo $message;
 188         exit;
 189     }
 190
 191     // Display the installation form if no existing config is found
 192     install($conf, $sessionManager, $loginManager);
 193 }
 194
 195 $loginManager->checkLoginState($_COOKIE, $clientIpId);
 196
 197 /**
 198  * Adapter function to ensure compatibility with third-party templates
 199  *
 200  * @see https://github.com/shaarli/Shaarli/pull/1086
 201  *
 202  * @return bool true when the user is logged in, false otherwise
 203  */
 204 function isLoggedIn()
 205 {
 206     global $loginManager;
 207     return $loginManager->isLoggedIn();
 208 }
 209
 210
 211 // ------------------------------------------------------------------------------------------
 212 // Process login form: Check if login/password is correct.
 213 if (isset($_POST['login'])) {
 214     if (! $loginManager->canLogin($_SERVER)) {
 215         die(t('I said: NO. You are banned for the moment. Go away.'));
 216     }
 217     if (isset($_POST['password'])
 218         && $sessionManager->checkToken($_POST['token'])
 219         && $loginManager->checkCredentials($_SERVER['REMOTE_ADDR'], $clientIpId, $_POST['login'], $_POST['password'])
 220     ) {
 221         $loginManager->handleSuccessfulLogin($_SERVER);
 222
 223         $cookiedir = '';
 224         if (dirname($_SERVER['SCRIPT_NAME']) != '/') {
 225             // Note: Never forget the trailing slash on the cookie path!
 226             $cookiedir = dirname($_SERVER["SCRIPT_NAME"]) . '/';
 227         }
 228
 229         if (!empty($_POST['longlastingsession'])) {
 230             // Keep the session cookie even after the browser closes
 231             $sessionManager->setStaySignedIn(true);
 232             $expirationTime = $sessionManager->extendSession();
 233
 234             setcookie(
 235                 $loginManager::$STAY_SIGNED_IN_COOKIE,
 236                 $loginManager->getStaySignedInToken(),
 237                 $expirationTime,
 238                 WEB_PATH
 239             );
 240         } else {
 241             // Standard session expiration (=when browser closes)
 242             $expirationTime = 0;
 243         }
 244
 245         // Send cookie with the new expiration date to the browser
 246         session_set_cookie_params($expirationTime, $cookiedir, $_SERVER['SERVER_NAME']);
 247         session_regenerate_id(true);
 248
 249         // Optional redirect after login:
 250         if (isset($_GET['post'])) {
 251             $uri = '?post='. urlencode($_GET['post']);
 252             foreach (array('description', 'source', 'title', 'tags') as $param) {
 253                 if (!empty($_GET[$param])) {
 254                     $uri .= '&'.$param.'='.urlencode($_GET[$param]);
 255                 }
 256             }
 257             header('Location: '. $uri);
 258             exit;
 259         }
 260
 261         if (isset($_GET['edit_link'])) {
 262             header('Location: ?edit_link='. escape($_GET['edit_link']));
 263             exit;
 264         }
 265
 266         if (isset($_POST['returnurl'])) {
 267             // Prevent loops over login screen.
 268             if (strpos($_POST['returnurl'], 'do=login') === false) {
 269                 header('Location: '. generateLocation($_POST['returnurl'], $_SERVER['HTTP_HOST']));
 270                 exit;
 271             }
 272         }
 273         header('Location: ?');
 274         exit;
 275     } else {
 276         $loginManager->handleFailedLogin($_SERVER);
 277         $redir = '&username='. urlencode($_POST['login']);
 278         if (isset($_GET['post'])) {
 279             $redir .= '&post=' . urlencode($_GET['post']);
 280             foreach (array('description', 'source', 'title', 'tags') as $param) {
 281                 if (!empty($_GET[$param])) {
 282                     $redir .= '&' . $param . '=' . urlencode($_GET[$param]);
 283                 }
 284             }
 285         }
 286         // Redirect to login screen.
 287         echo '<script>alert("'. t("Wrong login/password.") .'");document.location=\'?do=login'.$redir.'\';</script>';
 288         exit;
 289     }
 290 }
 291
 292 // ------------------------------------------------------------------------------------------
 293 // Token management for XSRF protection
 294 // Token should be used in any form which acts on data (create,update,delete,import...).
 295 if (!isset($_SESSION['tokens'])) {
 296     $_SESSION['tokens']=array();  // Token are attached to the session.
 297 }
 298
 299 /**
 300  * Daily RSS feed: 1 RSS entry per day giving all the bookmarks on that day.
 301  * Gives the last 7 days (which have bookmarks).
 302  * This RSS feed cannot be filtered.
 303  *
 304  * @param BookmarkServiceInterface $bookmarkService
 305  * @param ConfigManager            $conf            Configuration Manager instance
 306  * @param LoginManager             $loginManager    LoginManager instance
 307  */
 308 function showDailyRSS($bookmarkService, $conf, $loginManager)
 309 {
 310     // Cache system
 311     $query = $_SERVER['QUERY_STRING'];
 312     $cache = new CachedPage(
 313         $conf->get('config.PAGE_CACHE'),
 314         page_url($_SERVER),
 315         startsWith($query, 'do=dailyrss') && !$loginManager->isLoggedIn()
 316     );
 317     $cached = $cache->cachedVersion();
 318     if (!empty($cached)) {
 319         echo $cached;
 320         exit;
 321     }
 322
 323     /* Some Shaarlies may have very few bookmarks, so we need to look
 324        back in time until we have enough days ($nb_of_days).
 325     */
 326     $nb_of_days = 7; // We take 7 days.
 327     $today = date('Ymd');
 328     $days = array();
 329
 330     foreach ($bookmarkService->search() as $bookmark) {
 331         $day = $bookmark->getCreated()->format('Ymd'); // Extract day (without time)
 332         if (strcmp($day, $today) < 0) {
 333             if (empty($days[$day])) {
 334                 $days[$day] = array();
 335             }
 336             $days[$day][] = $bookmark;
 337         }
 338
 339         if (count($days) > $nb_of_days) {
 340             break; // Have we collected enough days?
 341         }
 342     }
 343
 344     // Build the RSS feed.
 345     header('Content-Type: application/rss+xml; charset=utf-8');
 346     $pageaddr = escape(index_url($_SERVER));
 347     echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0">';
 348     echo '<channel>';
 349     echo '<title>Daily - '. $conf->get('general.title') . '</title>';
 350     echo '<link>'. $pageaddr .'</link>';
 351     echo '<description>Daily shared bookmarks</description>';
 352     echo '<language>en-en</language>';
 353     echo '<copyright>'. $pageaddr .'</copyright>'. PHP_EOL;
 354
 355     $factory = new FormatterFactory($conf, $loginManager->isLoggedIn());
 356     $formatter = $factory->getFormatter();
 357     $formatter->addContextData('index_url', index_url($_SERVER));
 358     // For each day.
 359     /** @var Bookmark[] $bookmarks */
 360     foreach ($days as $day => $bookmarks) {
 361         $formattedBookmarks = [];
 362         $dayDate = DateTime::createFromFormat(Bookmark::LINK_DATE_FORMAT, $day.'_000000');
 363         $absurl = escape(index_url($_SERVER).'?do=daily&day='.$day);  // Absolute URL of the corresponding "Daily" page.
 364
 365         // We pre-format some fields for proper output.
 366         foreach ($bookmarks as $key => $bookmark) {
 367             $formattedBookmarks[$key] = $formatter->format($bookmark);
 368             // This page is a bit specific, we need raw description to calculate the length
 369             $formattedBookmarks[$key]['formatedDescription'] = $formattedBookmarks[$key]['description'];
 370             $formattedBookmarks[$key]['description'] = $bookmark->getDescription();
 371
 372             if ($bookmark->isNote()) {
 373                 $link['url'] = index_url($_SERVER) . $bookmark->getUrl();  // make permalink URL absolute
 374             }
 375         }
 376
 377         // Then build the HTML for this day:
 378         $tpl = new RainTPL();
 379         $tpl->assign('title', $conf->get('general.title'));
 380         $tpl->assign('daydate', $dayDate->getTimestamp());
 381         $tpl->assign('absurl', $absurl);
 382         $tpl->assign('links', $formattedBookmarks);
 383         $tpl->assign('rssdate', escape($dayDate->format(DateTime::RSS)));
 384         $tpl->assign('hide_timestamps', $conf->get('privacy.hide_timestamps', false));
 385         $tpl->assign('index_url', $pageaddr);
 386         $html = $tpl->draw('dailyrss', true);
 387
 388         echo $html . PHP_EOL;
 389     }
 390     echo '</channel></rss><!-- Cached version of '. escape(page_url($_SERVER)) .' -->';
 391
 392     $cache->cache(ob_get_contents());
 393     ob_end_flush();
 394     exit;
 395 }
 396
 397 /**
 398  * Show the 'Daily' page.
 399  *
 400  * @param PageBuilder              $pageBuilder     Template engine wrapper.
 401  * @param BookmarkServiceInterface $bookmarkService instance.
 402  * @param ConfigManager            $conf            Configuration Manager instance.
 403  * @param PluginManager            $pluginManager   Plugin Manager instance.
 404  * @param LoginManager             $loginManager    Login Manager instance
 405  */
 406 function showDaily($pageBuilder, $bookmarkService, $conf, $pluginManager, $loginManager)
 407 {
 408     if (isset($_GET['day'])) {
 409         $day = $_GET['day'];
 410         if ($day === date('Ymd', strtotime('now'))) {
 411             $pageBuilder->assign('dayDesc', t('Today'));
 412         } elseif ($day === date('Ymd', strtotime('-1 days'))) {
 413             $pageBuilder->assign('dayDesc', t('Yesterday'));
 414         }
 415     } else {
 416         $day = date('Ymd', strtotime('now')); // Today, in format YYYYMMDD.
 417         $pageBuilder->assign('dayDesc', t('Today'));
 418     }
 419
 420     $days = $bookmarkService->days();
 421     $i = array_search($day, $days);
 422     if ($i === false && count($days)) {
 423         // no bookmarks for day, but at least one day with bookmarks
 424         $i = count($days) - 1;
 425         $day = $days[$i];
 426     }
 427     $previousday = '';
 428     $nextday = '';
 429
 430     if ($i !== false) {
 431         if ($i >= 1) {
 432              $previousday = $days[$i - 1];
 433         }
 434         if ($i < count($days) - 1) {
 435             $nextday = $days[$i + 1];
 436         }
 437     }
 438     try {
 439         $linksToDisplay = $bookmarkService->filterDay($day);
 440     } catch (Exception $exc) {
 441         error_log($exc);
 442         $linksToDisplay = [];
 443     }
 444
 445     $factory = new FormatterFactory($conf, $loginManager->isLoggedIn());
 446     $formatter = $factory->getFormatter();
 447     // We pre-format some fields for proper output.
 448     foreach ($linksToDisplay as $key => $bookmark) {
 449         $linksToDisplay[$key] = $formatter->format($bookmark);
 450         // This page is a bit specific, we need raw description to calculate the length
 451         $linksToDisplay[$key]['formatedDescription'] = $linksToDisplay[$key]['description'];
 452         $linksToDisplay[$key]['description'] = $bookmark->getDescription();
 453     }
 454
 455     $dayDate = DateTime::createFromFormat(Bookmark::LINK_DATE_FORMAT, $day.'_000000');
 456     $data = array(
 457         'pagetitle' => $conf->get('general.title') .' - '. format_date($dayDate, false),
 458         'linksToDisplay' => $linksToDisplay,
 459         'day' => $dayDate->getTimestamp(),
 460         'dayDate' => $dayDate,
 461         'previousday' => $previousday,
 462         'nextday' => $nextday,
 463     );
 464
 465     /* Hook is called before column construction so that plugins don't have
 466        to deal with columns. */
 467     $pluginManager->executeHooks('render_daily', $data, array('loggedin' => $loginManager->isLoggedIn()));
 468
 469     /* We need to spread the articles on 3 columns.
 470        I did not want to use a JavaScript lib like http://masonry.desandro.com/
 471        so I manually spread entries with a simple method: I roughly evaluate the
 472        height of a div according to title and description length.
 473     */
 474     $columns = array(array(), array(), array()); // Entries to display, for each column.
 475     $fill = array(0, 0, 0);  // Rough estimate of columns fill.
 476     foreach ($data['linksToDisplay'] as $key => $bookmark) {
 477         // Roughly estimate length of entry (by counting characters)
 478         // Title: 30 chars = 1 line. 1 line is 30 pixels height.
 479         // Description: 836 characters gives roughly 342 pixel height.
 480         // This is not perfect, but it's usually OK.
 481         $length = strlen($bookmark['title']) + (342 * strlen($bookmark['description'])) / 836;
 482         if (! empty($bookmark['thumbnail'])) {
 483             $length += 100; // 1 thumbnails roughly takes 100 pixels height.
 484         }
 485         // Then put in column which is the less filled:
 486         $smallest = min($fill); // find smallest value in array.
 487         $index = array_search($smallest, $fill); // find index of this smallest value.
 488         array_push($columns[$index], $bookmark); // Put entry in this column.
 489         $fill[$index] += $length;
 490     }
 491
 492     $data['cols'] = $columns;
 493
 494     foreach ($data as $key => $value) {
 495         $pageBuilder->assign($key, $value);
 496     }
 497
 498     $pageBuilder->assign('pagetitle', t('Daily') .' - '. $conf->get('general.title', 'Shaarli'));
 499     $pageBuilder->renderPage('daily');
 500     exit;
 501 }
 502
 503 /**
 504  * Renders the linklist
 505  *
 506  * @param pageBuilder              $PAGE          pageBuilder instance.
 507  * @param BookmarkServiceInterface $linkDb        instance.
 508  * @param ConfigManager            $conf          Configuration Manager instance.
 509  * @param PluginManager            $pluginManager Plugin Manager instance.
 510  */
 511 function showLinkList($PAGE, $linkDb, $conf, $pluginManager, $loginManager)
 512 {
 513     buildLinkList($PAGE, $linkDb, $conf, $pluginManager, $loginManager);
 514     $PAGE->renderPage('linklist');
 515 }
 516
 517 /**
 518  * Render HTML page (according to URL parameters and user rights)
 519  *
 520  * @param ConfigManager            $conf           Configuration Manager instance.
 521  * @param PluginManager            $pluginManager  Plugin Manager instance,
 522  * @param BookmarkServiceInterface $bookmarkService
 523  * @param History                  $history        instance
 524  * @param SessionManager           $sessionManager SessionManager instance
 525  * @param LoginManager             $loginManager   LoginManager instance
 526  */
 527 function renderPage($conf, $pluginManager, $bookmarkService, $history, $sessionManager, $loginManager)
 528 {
 529     $updater = new Updater(
 530         UpdaterUtils::read_updates_file($conf->get('resource.updates')),
 531         $bookmarkService,
 532         $conf,
 533         $loginManager->isLoggedIn()
 534     );
 535     try {
 536         $newUpdates = $updater->update();
 537         if (! empty($newUpdates)) {
 538             UpdaterUtils::write_updates_file(
 539                 $conf->get('resource.updates'),
 540                 $updater->getDoneUpdates()
 541             );
 542         }
 543     } catch (Exception $e) {
 544         die($e->getMessage());
 545     }
 546
 547     $PAGE = new PageBuilder($conf, $_SESSION, $bookmarkService, $sessionManager->generateToken(), $loginManager->isLoggedIn());
 548     $PAGE->assign('linkcount', $bookmarkService->count(BookmarkFilter::$ALL));
 549     $PAGE->assign('privateLinkcount', $bookmarkService->count(BookmarkFilter::$PRIVATE));
 550     $PAGE->assign('plugin_errors', $pluginManager->getErrors());
 551
 552     // Determine which page will be rendered.
 553     $query = (isset($_SERVER['QUERY_STRING'])) ? $_SERVER['QUERY_STRING'] : '';
 554     $targetPage = Router::findPage($query, $_GET, $loginManager->isLoggedIn());
 555
 556     if (// if the user isn't logged in
 557         !$loginManager->isLoggedIn() &&
 558         // and Shaarli doesn't have public content...
 559         $conf->get('privacy.hide_public_links') &&
 560         // and is configured to enforce the login
 561         $conf->get('privacy.force_login') &&
 562         // and the current page isn't already the login page
 563         $targetPage !== Router::$PAGE_LOGIN &&
 564         // and the user is not requesting a feed (which would lead to a different content-type as expected)
 565         $targetPage !== Router::$PAGE_FEED_ATOM &&
 566         $targetPage !== Router::$PAGE_FEED_RSS
 567     ) {
 568         // force current page to be the login page
 569         $targetPage = Router::$PAGE_LOGIN;
 570     }
 571
 572     // Call plugin hooks for header, footer and includes, specifying which page will be rendered.
 573     // Then assign generated data to RainTPL.
 574     $common_hooks = array(
 575         'includes',
 576         'header',
 577         'footer',
 578     );
 579
 580     foreach ($common_hooks as $name) {
 581         $plugin_data = array();
 582         $pluginManager->executeHooks(
 583             'render_' . $name,
 584             $plugin_data,
 585             array(
 586                 'target' => $targetPage,
 587                 'loggedin' => $loginManager->isLoggedIn()
 588             )
 589         );
 590         $PAGE->assign('plugins_' . $name, $plugin_data);
 591     }
 592
 593     // -------- Display login form.
 594     if ($targetPage == Router::$PAGE_LOGIN) {
 595         if ($conf->get('security.open_shaarli')) {
 596             header('Location: ?');
 597             exit;
 598         }  // No need to login for open Shaarli
 599         if (isset($_GET['username'])) {
 600             $PAGE->assign('username', escape($_GET['username']));
 601         }
 602         $PAGE->assign('returnurl', (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']):''));
 603         // add default state of the 'remember me' checkbox
 604         $PAGE->assign('remember_user_default', $conf->get('privacy.remember_user_default'));
 605         $PAGE->assign('user_can_login', $loginManager->canLogin($_SERVER));
 606         $PAGE->assign('pagetitle', t('Login') .' - '. $conf->get('general.title', 'Shaarli'));
 607         $PAGE->renderPage('loginform');
 608         exit;
 609     }
 610     // -------- User wants to logout.
 611     if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=logout')) {
 612         invalidateCaches($conf->get('resource.page_cache'));
 613         $sessionManager->logout();
 614         setcookie(LoginManager::$STAY_SIGNED_IN_COOKIE, 'false', 0, WEB_PATH);
 615         header('Location: ?');
 616         exit;
 617     }
 618
 619     // -------- Picture wall
 620     if ($targetPage == Router::$PAGE_PICWALL) {
 621         $PAGE->assign('pagetitle', t('Picture wall') .' - '. $conf->get('general.title', 'Shaarli'));
 622         if (! $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE) === Thumbnailer::MODE_NONE) {
 623             $PAGE->assign('linksToDisplay', []);
 624             $PAGE->renderPage('picwall');
 625             exit;
 626         }
 627
 628         // Optionally filter the results:
 629         $links = $bookmarkService->search($_GET);
 630         $linksToDisplay = [];
 631
 632         // Get only bookmarks which have a thumbnail.
 633         // Note: we do not retrieve thumbnails here, the request is too heavy.
 634         $factory = new FormatterFactory($conf, $loginManager->isLoggedIn());
 635         $formatter = $factory->getFormatter();
 636         foreach ($links as $key => $link) {
 637             if ($link->getThumbnail() !== false) {
 638                 $linksToDisplay[] = $formatter->format($link);
 639             }
 640         }
 641
 642         $data = [
 643             'linksToDisplay' => $linksToDisplay,
 644         ];
 645         $pluginManager->executeHooks('render_picwall', $data, ['loggedin' => $loginManager->isLoggedIn()]);
 646
 647         foreach ($data as $key => $value) {
 648             $PAGE->assign($key, $value);
 649         }
 650
 651         $PAGE->renderPage('picwall');
 652         exit;
 653     }
 654
 655     // -------- Tag cloud
 656     if ($targetPage == Router::$PAGE_TAGCLOUD) {
 657         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
 658         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 659         $tags = $bookmarkService->bookmarksCountPerTag($filteringTags, $visibility);
 660
 661         // We sort tags alphabetically, then choose a font size according to count.
 662         // First, find max value.
 663         $maxcount = 0;
 664         foreach ($tags as $value) {
 665             $maxcount = max($maxcount, $value);
 666         }
 667
 668         alphabetical_sort($tags, false, true);
 669
 670         $tagList = array();
 671         foreach ($tags as $key => $value) {
 672             if (in_array($key, $filteringTags)) {
 673                 continue;
 674             }
 675             // Tag font size scaling:
 676             //   default 15 and 30 logarithm bases affect scaling,
 677             //   22 and 6 are arbitrary font sizes for max and min sizes.
 678             $size = log($value, 15) / log($maxcount, 30) * 2.2 + 0.8;
 679             $tagList[$key] = array(
 680                 'count' => $value,
 681                 'size' => number_format($size, 2, '.', ''),
 682             );
 683         }
 684
 685         $searchTags = implode(' ', escape($filteringTags));
 686         $data = array(
 687             'search_tags' => $searchTags,
 688             'tags' => $tagList,
 689         );
 690         $pluginManager->executeHooks('render_tagcloud', $data, array('loggedin' => $loginManager->isLoggedIn()));
 691
 692         foreach ($data as $key => $value) {
 693             $PAGE->assign($key, $value);
 694         }
 695
 696         $searchTags = ! empty($searchTags) ? $searchTags .' - ' : '';
 697         $PAGE->assign('pagetitle', $searchTags. t('Tag cloud') .' - '. $conf->get('general.title', 'Shaarli'));
 698         $PAGE->renderPage('tag.cloud');
 699         exit;
 700     }
 701
 702     // -------- Tag list
 703     if ($targetPage == Router::$PAGE_TAGLIST) {
 704         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
 705         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 706         $tags = $bookmarkService->bookmarksCountPerTag($filteringTags, $visibility);
 707         foreach ($filteringTags as $tag) {
 708             if (array_key_exists($tag, $tags)) {
 709                 unset($tags[$tag]);
 710             }
 711         }
 712
 713         if (! empty($_GET['sort']) && $_GET['sort'] === 'alpha') {
 714             alphabetical_sort($tags, false, true);
 715         }
 716
 717         $searchTags = implode(' ', escape($filteringTags));
 718         $data = [
 719             'search_tags' => $searchTags,
 720             'tags' => $tags,
 721         ];
 722         $pluginManager->executeHooks('render_taglist', $data, ['loggedin' => $loginManager->isLoggedIn()]);
 723
 724         foreach ($data as $key => $value) {
 725             $PAGE->assign($key, $value);
 726         }
 727
 728         $searchTags = ! empty($searchTags) ? $searchTags .' - ' : '';
 729         $PAGE->assign('pagetitle', $searchTags . t('Tag list') .' - '. $conf->get('general.title', 'Shaarli'));
 730         $PAGE->renderPage('tag.list');
 731         exit;
 732     }
 733
 734     // Daily page.
 735     if ($targetPage == Router::$PAGE_DAILY) {
 736         showDaily($PAGE, $bookmarkService, $conf, $pluginManager, $loginManager);
 737     }
 738
 739     // ATOM and RSS feed.
 740     if ($targetPage == Router::$PAGE_FEED_ATOM || $targetPage == Router::$PAGE_FEED_RSS) {
 741         $feedType = $targetPage == Router::$PAGE_FEED_RSS ? FeedBuilder::$FEED_RSS : FeedBuilder::$FEED_ATOM;
 742         header('Content-Type: application/'. $feedType .'+xml; charset=utf-8');
 743
 744         // Cache system
 745         $query = $_SERVER['QUERY_STRING'];
 746         $cache = new CachedPage(
 747             $conf->get('resource.page_cache'),
 748             page_url($_SERVER),
 749             startsWith($query, 'do='. $targetPage) && !$loginManager->isLoggedIn()
 750         );
 751         $cached = $cache->cachedVersion();
 752         if (!empty($cached)) {
 753             echo $cached;
 754             exit;
 755         }
 756
 757         $factory = new FormatterFactory($conf, $loginManager->isLoggedIn());
 758         // Generate data.
 759         $feedGenerator = new FeedBuilder(
 760             $bookmarkService,
 761             $factory->getFormatter(),
 762             $feedType,
 763             $_SERVER,
 764             $_GET,
 765             $loginManager->isLoggedIn()
 766         );
 767         $feedGenerator->setLocale(strtolower(setlocale(LC_COLLATE, 0)));
 768         $feedGenerator->setHideDates($conf->get('privacy.hide_timestamps') && !$loginManager->isLoggedIn());
 769         $feedGenerator->setUsePermalinks(isset($_GET['permalinks']) || !$conf->get('feed.rss_permalinks'));
 770         $data = $feedGenerator->buildData();
 771
 772         // Process plugin hook.
 773         $pluginManager->executeHooks('render_feed', $data, array(
 774             'loggedin' => $loginManager->isLoggedIn(),
 775             'target' => $targetPage,
 776         ));
 777
 778         // Render the template.
 779         $PAGE->assignAll($data);
 780         $PAGE->renderPage('feed.'. $feedType);
 781         $cache->cache(ob_get_contents());
 782         ob_end_flush();
 783         exit;
 784     }
 785
 786     // Display opensearch plugin (XML)
 787     if ($targetPage == Router::$PAGE_OPENSEARCH) {
 788         header('Content-Type: application/xml; charset=utf-8');
 789         $PAGE->assign('serverurl', index_url($_SERVER));
 790         $PAGE->renderPage('opensearch');
 791         exit;
 792     }
 793
 794     // -------- User clicks on a tag in a link: The tag is added to the list of searched tags (searchtags=...)
 795     if (isset($_GET['addtag'])) {
 796         // Get previous URL (http_referer) and add the tag to the searchtags parameters in query.
 797         if (empty($_SERVER['HTTP_REFERER'])) {
 798             // In case browser does not send HTTP_REFERER
 799             header('Location: ?searchtags='.urlencode($_GET['addtag']));
 800             exit;
 801         }
 802         parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $params);
 803
 804         // Prevent redirection loop
 805         if (isset($params['addtag'])) {
 806             unset($params['addtag']);
 807         }
 808
 809         // Check if this tag is already in the search query and ignore it if it is.
 810         // Each tag is always separated by a space
 811         if (isset($params['searchtags'])) {
 812             $current_tags = explode(' ', $params['searchtags']);
 813         } else {
 814             $current_tags = array();
 815         }
 816         $addtag = true;
 817         foreach ($current_tags as $value) {
 818             if ($value === $_GET['addtag']) {
 819                 $addtag = false;
 820                 break;
 821             }
 822         }
 823         // Append the tag if necessary
 824         if (empty($params['searchtags'])) {
 825             $params['searchtags'] = trim($_GET['addtag']);
 826         } elseif ($addtag) {
 827             $params['searchtags'] = trim($params['searchtags']).' '.trim($_GET['addtag']);
 828         }
 829
 830         // We also remove page (keeping the same page has no sense, since the
 831         // results are different)
 832         unset($params['page']);
 833
 834         header('Location: ?'.http_build_query($params));
 835         exit;
 836     }
 837
 838     // -------- User clicks on a tag in result count: Remove the tag from the list of searched tags (searchtags=...)
 839     if (isset($_GET['removetag'])) {
 840         // Get previous URL (http_referer) and remove the tag from the searchtags parameters in query.
 841         if (empty($_SERVER['HTTP_REFERER'])) {
 842             header('Location: ?');
 843             exit;
 844         }
 845
 846         // In case browser does not send HTTP_REFERER
 847         parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $params);
 848
 849         // Prevent redirection loop
 850         if (isset($params['removetag'])) {
 851             unset($params['removetag']);
 852         }
 853
 854         if (isset($params['searchtags'])) {
 855             $tags = explode(' ', $params['searchtags']);
 856             // Remove value from array $tags.
 857             $tags = array_diff($tags, array($_GET['removetag']));
 858             $params['searchtags'] = implode(' ', $tags);
 859
 860             if (empty($params['searchtags'])) {
 861                 unset($params['searchtags']);
 862             }
 863
 864             // We also remove page (keeping the same page has no sense, since
 865             // the results are different)
 866             unset($params['page']);
 867         }
 868         header('Location: ?'.http_build_query($params));
 869         exit;
 870     }
 871
 872     // -------- User wants to change the number of bookmarks per page (linksperpage=...)
 873     if (isset($_GET['linksperpage'])) {
 874         if (is_numeric($_GET['linksperpage'])) {
 875             $_SESSION['LINKS_PER_PAGE']=abs(intval($_GET['linksperpage']));
 876         }
 877
 878         if (! empty($_SERVER['HTTP_REFERER'])) {
 879             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('linksperpage'));
 880         } else {
 881             $location = '?';
 882         }
 883         header('Location: '. $location);
 884         exit;
 885     }
 886
 887     // -------- User wants to see only private bookmarks (toggle)
 888     if (isset($_GET['visibility'])) {
 889         if ($_GET['visibility'] === 'private') {
 890             // Visibility not set or not already private, set private, otherwise reset it
 891             if (empty($_SESSION['visibility']) || $_SESSION['visibility'] !== 'private') {
 892                 // See only private bookmarks
 893                 $_SESSION['visibility'] = 'private';
 894             } else {
 895                 unset($_SESSION['visibility']);
 896             }
 897         } elseif ($_GET['visibility'] === 'public') {
 898             if (empty($_SESSION['visibility']) || $_SESSION['visibility'] !== 'public') {
 899                 // See only public bookmarks
 900                 $_SESSION['visibility'] = 'public';
 901             } else {
 902                 unset($_SESSION['visibility']);
 903             }
 904         }
 905
 906         if (! empty($_SERVER['HTTP_REFERER'])) {
 907             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('visibility'));
 908         } else {
 909             $location = '?';
 910         }
 911         header('Location: '. $location);
 912         exit;
 913     }
 914
 915     // -------- User wants to see only untagged bookmarks (toggle)
 916     if (isset($_GET['untaggedonly'])) {
 917         $_SESSION['untaggedonly'] = empty($_SESSION['untaggedonly']);
 918
 919         if (! empty($_SERVER['HTTP_REFERER'])) {
 920             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('untaggedonly'));
 921         } else {
 922             $location = '?';
 923         }
 924         header('Location: '. $location);
 925         exit;
 926     }
 927
 928     // -------- Handle other actions allowed for non-logged in users:
 929     if (!$loginManager->isLoggedIn()) {
 930         // User tries to post new link but is not logged in:
 931         // Show login screen, then redirect to ?post=...
 932         if (isset($_GET['post'])) {
 933             header( // Redirect to login page, then back to post link.
 934                 'Location: ?do=login&post='.urlencode($_GET['post']).
 935                 (!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').
 936                 (!empty($_GET['description'])?'&description='.urlencode($_GET['description']):'').
 937                 (!empty($_GET['tags'])?'&tags='.urlencode($_GET['tags']):'').
 938                 (!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')
 939             );
 940             exit;
 941         }
 942
 943         showLinkList($PAGE, $bookmarkService, $conf, $pluginManager, $loginManager);
 944         if (isset($_GET['edit_link'])) {
 945             header('Location: ?do=login&edit_link='. escape($_GET['edit_link']));
 946             exit;
 947         }
 948
 949         exit; // Never remove this one! All operations below are reserved for logged in user.
 950     }
 951
 952     // -------- All other functions are reserved for the registered user:
 953
 954     // -------- Display the Tools menu if requested (import/export/bookmarklet...)
 955     if ($targetPage == Router::$PAGE_TOOLS) {
 956         $data = [
 957             'pageabsaddr' => index_url($_SERVER),
 958             'sslenabled' => is_https($_SERVER),
 959         ];
 960         $pluginManager->executeHooks('render_tools', $data);
 961
 962         foreach ($data as $key => $value) {
 963             $PAGE->assign($key, $value);
 964         }
 965
 966         $PAGE->assign('pagetitle', t('Tools') .' - '. $conf->get('general.title', 'Shaarli'));
 967         $PAGE->renderPage('tools');
 968         exit;
 969     }
 970
 971     // -------- User wants to change his/her password.
 972     if ($targetPage == Router::$PAGE_CHANGEPASSWORD) {
 973         if ($conf->get('security.open_shaarli')) {
 974             die(t('You are not supposed to change a password on an Open Shaarli.'));
 975         }
 976
 977         if (!empty($_POST['setpassword']) && !empty($_POST['oldpassword'])) {
 978             if (!$sessionManager->checkToken($_POST['token'])) {
 979                 die(t('Wrong token.')); // Go away!
 980             }
 981
 982             // Make sure old password is correct.
 983             $oldhash = sha1(
 984                 $_POST['oldpassword'].$conf->get('credentials.login').$conf->get('credentials.salt')
 985             );
 986             if ($oldhash != $conf->get('credentials.hash')) {
 987                 echo '<script>alert("'
 988                     . t('The old password is not correct.')
 989                     .'");document.location=\'?do=changepasswd\';</script>';
 990                 exit;
 991             }
 992             // Save new password
 993             // Salt renders rainbow-tables attacks useless.
 994             $conf->set('credentials.salt', sha1(uniqid('', true) .'_'. mt_rand()));
 995             $conf->set(
 996                 'credentials.hash',
 997                 sha1(
 998                     $_POST['setpassword']
 999                     . $conf->get('credentials.login')
1000                     . $conf->get('credentials.salt')
1001                 )
1002             );
1003             try {
1004                 $conf->write($loginManager->isLoggedIn());
1005             } catch (Exception $e) {
1006                 error_log(
1007                     'ERROR while writing config file after changing password.' . PHP_EOL .
1008                     $e->getMessage()
1009                 );
1010
1011                 // TODO: do not handle exceptions/errors in JS.
1012                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=tools\';</script>';
1013                 exit;
1014             }
1015             echo '<script>alert("'. t('Your password has been changed') .'");document.location=\'?do=tools\';</script>';
1016             exit;
1017         } else {
1018             // show the change password form.
1019             $PAGE->assign('pagetitle', t('Change password') .' - '. $conf->get('general.title', 'Shaarli'));
1020             $PAGE->renderPage('changepassword');
1021             exit;
1022         }
1023     }
1024
1025     // -------- User wants to change configuration
1026     if ($targetPage == Router::$PAGE_CONFIGURE) {
1027         if (!empty($_POST['title'])) {
1028             if (!$sessionManager->checkToken($_POST['token'])) {
1029                 die(t('Wrong token.')); // Go away!
1030             }
1031             $tz = 'UTC';
1032             if (!empty($_POST['continent']) && !empty($_POST['city'])
1033                 && isTimeZoneValid($_POST['continent'], $_POST['city'])
1034             ) {
1035                 $tz = $_POST['continent'] . '/' . $_POST['city'];
1036             }
1037             $conf->set('general.timezone', $tz);
1038             $conf->set('general.title', escape($_POST['title']));
1039             $conf->set('general.header_link', escape($_POST['titleLink']));
1040             $conf->set('general.retrieve_description', !empty($_POST['retrieveDescription']));
1041             $conf->set('resource.theme', escape($_POST['theme']));
1042             $conf->set('security.session_protection_disabled', !empty($_POST['disablesessionprotection']));
1043             $conf->set('privacy.default_private_links', !empty($_POST['privateLinkByDefault']));
1044             $conf->set('feed.rss_permalinks', !empty($_POST['enableRssPermalinks']));
1045             $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1046             $conf->set('privacy.hide_public_links', !empty($_POST['hidePublicLinks']));
1047             $conf->set('api.enabled', !empty($_POST['enableApi']));
1048             $conf->set('api.secret', escape($_POST['apiSecret']));
1049             $conf->set('formatter', escape($_POST['formatter']));
1050
1051             if (! empty($_POST['language'])) {
1052                 $conf->set('translation.language', escape($_POST['language']));
1053             }
1054
1055             $thumbnailsMode = extension_loaded('gd') ? $_POST['enableThumbnails'] : Thumbnailer::MODE_NONE;
1056             if ($thumbnailsMode !== Thumbnailer::MODE_NONE
1057                 && $thumbnailsMode !== $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE)
1058             ) {
1059                 $_SESSION['warnings'][] = t(
1060                     'You have enabled or changed thumbnails mode. '
1061                     .'<a href="?do=thumbs_update">Please synchronize them</a>.'
1062                 );
1063             }
1064             $conf->set('thumbnails.mode', $thumbnailsMode);
1065
1066             try {
1067                 $conf->write($loginManager->isLoggedIn());
1068                 $history->updateSettings();
1069                 invalidateCaches($conf->get('resource.page_cache'));
1070             } catch (Exception $e) {
1071                 error_log(
1072                     'ERROR while writing config file after configuration update.' . PHP_EOL .
1073                     $e->getMessage()
1074                 );
1075
1076                 // TODO: do not handle exceptions/errors in JS.
1077                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=configure\';</script>';
1078                 exit;
1079             }
1080             echo '<script>alert("'. t('Configuration was saved.') .'");document.location=\'?do=configure\';</script>';
1081             exit;
1082         } else {
1083             // Show the configuration form.
1084             $PAGE->assign('title', $conf->get('general.title'));
1085             $PAGE->assign('theme', $conf->get('resource.theme'));
1086             $PAGE->assign('theme_available', ThemeUtils::getThemes($conf->get('resource.raintpl_tpl')));
1087             $PAGE->assign('formatter_available', ['default', 'markdown']);
1088             list($continents, $cities) = generateTimeZoneData(
1089                 timezone_identifiers_list(),
1090                 $conf->get('general.timezone')
1091             );
1092             $PAGE->assign('continents', $continents);
1093             $PAGE->assign('cities', $cities);
1094             $PAGE->assign('retrieve_description', $conf->get('general.retrieve_description'));
1095             $PAGE->assign('private_links_default', $conf->get('privacy.default_private_links', false));
1096             $PAGE->assign('session_protection_disabled', $conf->get('security.session_protection_disabled', false));
1097             $PAGE->assign('enable_rss_permalinks', $conf->get('feed.rss_permalinks', false));
1098             $PAGE->assign('enable_update_check', $conf->get('updates.check_updates', true));
1099             $PAGE->assign('hide_public_links', $conf->get('privacy.hide_public_links', false));
1100             $PAGE->assign('api_enabled', $conf->get('api.enabled', true));
1101             $PAGE->assign('api_secret', $conf->get('api.secret'));
1102             $PAGE->assign('languages', Languages::getAvailableLanguages());
1103             $PAGE->assign('gd_enabled', extension_loaded('gd'));
1104             $PAGE->assign('thumbnails_mode', $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE));
1105             $PAGE->assign('pagetitle', t('Configure') .' - '. $conf->get('general.title', 'Shaarli'));
1106             $PAGE->renderPage('configure');
1107             exit;
1108         }
1109     }
1110
1111     // -------- User wants to rename a tag or delete it
1112     if ($targetPage == Router::$PAGE_CHANGETAG) {
1113         if (empty($_POST['fromtag']) || (empty($_POST['totag']) && isset($_POST['renametag']))) {
1114             $PAGE->assign('fromtag', ! empty($_GET['fromtag']) ? escape($_GET['fromtag']) : '');
1115             $PAGE->assign('pagetitle', t('Manage tags') .' - '. $conf->get('general.title', 'Shaarli'));
1116             $PAGE->renderPage('changetag');
1117             exit;
1118         }
1119
1120         if (!$sessionManager->checkToken($_POST['token'])) {
1121             die(t('Wrong token.'));
1122         }
1123
1124         $toTag = isset($_POST['totag']) ? escape($_POST['totag']) : null;
1125         $fromTag = escape($_POST['fromtag']);
1126         $count = 0;
1127         $bookmarks = $bookmarkService->search(['searchtags' => $fromTag], BookmarkFilter::$ALL, true);
1128         foreach ($bookmarks as $bookmark) {
1129             if ($toTag) {
1130                 $bookmark->renameTag($fromTag, $toTag);
1131             } else {
1132                 $bookmark->deleteTag($fromTag);
1133             }
1134             $bookmarkService->set($bookmark, false);
1135             $history->updateLink($bookmark);
1136             $count++;
1137         }
1138         $bookmarkService->save();
1139         $delete = empty($_POST['totag']);
1140         $redirect = $delete ? 'do=changetag' : 'searchtags='. urlencode(escape($_POST['totag']));
1141         $alert = $delete
1142             ? sprintf(t('The tag was removed from %d link.', 'The tag was removed from %d bookmarks.', $count), $count)
1143             : sprintf(t('The tag was renamed in %d link.', 'The tag was renamed in %d bookmarks.', $count), $count);
1144         echo '<script>alert("'. $alert .'");document.location=\'?'. $redirect .'\';</script>';
1145         exit;
1146     }
1147
1148     // -------- User wants to add a link without using the bookmarklet: Show form.
1149     if ($targetPage == Router::$PAGE_ADDLINK) {
1150         $PAGE->assign('pagetitle', t('Shaare a new link') .' - '. $conf->get('general.title', 'Shaarli'));
1151         $PAGE->renderPage('addlink');
1152         exit;
1153     }
1154
1155     // -------- User clicked the "Save" button when editing a link: Save link to database.
1156     if (isset($_POST['save_edit'])) {
1157         // Go away!
1158         if (! $sessionManager->checkToken($_POST['token'])) {
1159             die(t('Wrong token.'));
1160         }
1161
1162         // lf_id should only be present if the link exists.
1163         $id = isset($_POST['lf_id']) ? intval(escape($_POST['lf_id'])) : null;
1164         if ($id && $bookmarkService->exists($id)) {
1165             // Edit
1166             $bookmark = $bookmarkService->get($id);
1167         } else {
1168             // New link
1169             $bookmark = new Bookmark();
1170         }
1171
1172         $bookmark->setTitle($_POST['lf_title']);
1173         $bookmark->setDescription($_POST['lf_description']);
1174         $bookmark->setUrl($_POST['lf_url'], $conf->get('security.allowed_protocols'));
1175         $bookmark->setPrivate(isset($_POST['lf_private']));
1176         $bookmark->setTagsString($_POST['lf_tags']);
1177
1178         if ($conf->get('thumbnails.mode', Thumbnailer::MODE_NONE) !== Thumbnailer::MODE_NONE
1179             && ! $bookmark->isNote()
1180         ) {
1181             $thumbnailer = new Thumbnailer($conf);
1182             $bookmark->setThumbnail($thumbnailer->get($bookmark->getUrl()));
1183         }
1184         $bookmarkService->addOrSet($bookmark, false);
1185
1186         // To preserve backward compatibility with 3rd parties, plugins still use arrays
1187         $factory = new FormatterFactory($conf, $loginManager->isLoggedIn());
1188         $formatter = $factory->getFormatter('raw');
1189         $data = $formatter->format($bookmark);
1190         $pluginManager->executeHooks('save_link', $data);
1191
1192         $bookmark->fromArray($data);
1193         $bookmarkService->set($bookmark);
1194
1195         // If we are called from the bookmarklet, we must close the popup:
1196         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1197             echo '<script>self.close();</script>';
1198             exit;
1199         }
1200
1201         $returnurl = !empty($_POST['returnurl']) ? $_POST['returnurl'] : '?';
1202         $location = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1203         // Scroll to the link which has been edited.
1204         $location .= '#' . $bookmark->getShortUrl();
1205         // After saving the link, redirect to the page the user was on.
1206         header('Location: '. $location);
1207         exit;
1208     }
1209
1210     // -------- User clicked the "Delete" button when editing a link: Delete link from database.
1211     if ($targetPage == Router::$PAGE_DELETELINK) {
1212         if (! $sessionManager->checkToken($_GET['token'])) {
1213             die(t('Wrong token.'));
1214         }
1215
1216         $ids = trim($_GET['lf_linkdate']);
1217         if (strpos($ids, ' ') !== false) {
1218             // multiple, space-separated ids provided
1219             $ids = array_values(array_filter(
1220                 preg_split('/\s+/', escape($ids)),
1221                 function ($item) {
1222                     return $item !== '';
1223                 }
1224             ));
1225         } else {
1226             // only a single id provided
1227             $shortUrl = $bookmarkService->get($ids)->getShortUrl();
1228             $ids = [$ids];
1229         }
1230         // assert at least one id is given
1231         if (!count($ids)) {
1232             die('no id provided');
1233         }
1234         $factory = new FormatterFactory($conf, $loginManager->isLoggedIn());
1235         $formatter = $factory->getFormatter('raw');
1236         foreach ($ids as $id) {
1237             $id = (int) escape($id);
1238             $bookmark = $bookmarkService->get($id);
1239             $data = $formatter->format($bookmark);
1240             $pluginManager->executeHooks('delete_link', $data);
1241             $bookmarkService->remove($bookmark, false);
1242         }
1243         $bookmarkService->save();
1244
1245         // If we are called from the bookmarklet, we must close the popup:
1246         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1247             echo '<script>self.close();</script>';
1248             exit;
1249         }
1250
1251         $location = '?';
1252         if (isset($_SERVER['HTTP_REFERER'])) {
1253             // Don't redirect to where we were previously if it was a permalink or an edit_link, because it would 404.
1254             $location = generateLocation(
1255                 $_SERVER['HTTP_REFERER'],
1256                 $_SERVER['HTTP_HOST'],
1257                 ['delete_link', 'edit_link', ! empty($shortUrl) ? $shortUrl : null]
1258             );
1259         }
1260
1261         header('Location: ' . $location); // After deleting the link, redirect to appropriate location
1262         exit;
1263     }
1264
1265     // -------- User clicked either "Set public" or "Set private" bulk operation
1266     if ($targetPage == Router::$PAGE_CHANGE_VISIBILITY) {
1267         if (! $sessionManager->checkToken($_GET['token'])) {
1268             die(t('Wrong token.'));
1269         }
1270
1271         $ids = trim($_GET['ids']);
1272         if (strpos($ids, ' ') !== false) {
1273             // multiple, space-separated ids provided
1274             $ids = array_values(array_filter(preg_split('/\s+/', escape($ids))));
1275         } else {
1276             // only a single id provided
1277             $ids = [$ids];
1278         }
1279
1280         // assert at least one id is given
1281         if (!count($ids)) {
1282             die('no id provided');
1283         }
1284         // assert that the visibility is valid
1285         if (!isset($_GET['newVisibility']) || !in_array($_GET['newVisibility'], ['public', 'private'])) {
1286             die('invalid visibility');
1287         } else {
1288             $private = $_GET['newVisibility'] === 'private';
1289         }
1290         $factory = new FormatterFactory($conf, $loginManager->isLoggedIn());
1291         $formatter = $factory->getFormatter('raw');
1292         foreach ($ids as $id) {
1293             $id = (int) escape($id);
1294             $bookmark = $bookmarkService->get($id);
1295             $bookmark->setPrivate($private);
1296
1297             // To preserve backward compatibility with 3rd parties, plugins still use arrays
1298             $data = $formatter->format($bookmark);
1299             $pluginManager->executeHooks('save_link', $data);
1300             $bookmark->fromArray($data);
1301
1302             $bookmarkService->set($bookmark);
1303         }
1304         $bookmarkService->save();
1305
1306         $location = '?';
1307         if (isset($_SERVER['HTTP_REFERER'])) {
1308             $location = generateLocation(
1309                 $_SERVER['HTTP_REFERER'],
1310                 $_SERVER['HTTP_HOST']
1311             );
1312         }
1313         header('Location: ' . $location); // After deleting the link, redirect to appropriate location
1314         exit;
1315     }
1316
1317     // -------- User clicked the "EDIT" button on a link: Display link edit form.
1318     if (isset($_GET['edit_link'])) {
1319         $id = (int) escape($_GET['edit_link']);
1320         try {
1321             $link = $bookmarkService->get($id);  // Read database
1322         } catch (BookmarkNotFoundException $e) {
1323             // Link not found in database.
1324             header('Location: ?');
1325             exit;
1326         }
1327
1328         $factory = new FormatterFactory($conf, $loginManager->isLoggedIn());
1329         $formatter = $factory->getFormatter('raw');
1330         $formattedLink = $formatter->format($link);
1331         $tags = $bookmarkService->bookmarksCountPerTag();
1332         if ($conf->get('formatter') === 'markdown') {
1333             $tags[BookmarkMarkdownFormatter::NO_MD_TAG] = 1;
1334         }
1335         $data = array(
1336             'link' => $formattedLink,
1337             'link_is_new' => false,
1338             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1339             'tags' => $tags,
1340         );
1341         $pluginManager->executeHooks('render_editlink', $data);
1342
1343         foreach ($data as $key => $value) {
1344             $PAGE->assign($key, $value);
1345         }
1346
1347         $PAGE->assign('pagetitle', t('Edit') .' '. t('Shaare') .' - '. $conf->get('general.title', 'Shaarli'));
1348         $PAGE->renderPage('editlink');
1349         exit;
1350     }
1351
1352     // -------- User want to post a new link: Display link edit form.
1353     if (isset($_GET['post'])) {
1354         $url = cleanup_url($_GET['post']);
1355
1356         $link_is_new = false;
1357         // Check if URL is not already in database (in this case, we will edit the existing link)
1358         $bookmark = $bookmarkService->findByUrl($url);
1359         if (! $bookmark) {
1360             $link_is_new = true;
1361             // Get title if it was provided in URL (by the bookmarklet).
1362             $title = empty($_GET['title']) ? '' : escape($_GET['title']);
1363             // Get description if it was provided in URL (by the bookmarklet). [Bronco added that]
1364             $description = empty($_GET['description']) ? '' : escape($_GET['description']);
1365             $tags = empty($_GET['tags']) ? '' : escape($_GET['tags']);
1366             $private = !empty($_GET['private']) && $_GET['private'] === "1" ? 1 : 0;
1367
1368             // If this is an HTTP(S) link, we try go get the page to extract
1369             // the title (otherwise we will to straight to the edit form.)
1370             if (empty($title) && strpos(get_url_scheme($url), 'http') !== false) {
1371                 $retrieveDescription = $conf->get('general.retrieve_description');
1372                 // Short timeout to keep the application responsive
1373                 // The callback will fill $charset and $title with data from the downloaded page.
1374                 get_http_response(
1375                     $url,
1376                     $conf->get('general.download_timeout', 30),
1377                     $conf->get('general.download_max_size', 4194304),
1378                     get_curl_download_callback($charset, $title, $description, $tags, $retrieveDescription)
1379                 );
1380                 if (! empty($title) && strtolower($charset) != 'utf-8') {
1381                     $title = mb_convert_encoding($title, 'utf-8', $charset);
1382                 }
1383             }
1384
1385             if ($url == '') {
1386                 $title = $conf->get('general.default_note_title', t('Note: '));
1387             }
1388             $url = escape($url);
1389             $title = escape($title);
1390
1391             $link = [
1392                 'title' => $title,
1393                 'url' => $url,
1394                 'description' => $description,
1395                 'tags' => $tags,
1396                 'private' => $private,
1397             ];
1398         } else {
1399             $factory = new FormatterFactory($conf, $loginManager->isLoggedIn());
1400             $formatter = $factory->getFormatter('raw');
1401             $link = $formatter->format($bookmark);
1402         }
1403
1404         $tags = $bookmarkService->bookmarksCountPerTag();
1405         if ($conf->get('formatter') === 'markdown') {
1406             $tags[BookmarkMarkdownFormatter::NO_MD_TAG] = 1;
1407         }
1408         $data = [
1409             'link' => $link,
1410             'link_is_new' => $link_is_new,
1411             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1412             'source' => (isset($_GET['source']) ? $_GET['source'] : ''),
1413             'tags' => $tags,
1414             'default_private_links' => $conf->get('privacy.default_private_links', false),
1415         ];
1416         $pluginManager->executeHooks('render_editlink', $data);
1417
1418         foreach ($data as $key => $value) {
1419             $PAGE->assign($key, $value);
1420         }
1421
1422         $PAGE->assign('pagetitle', t('Shaare') .' - '. $conf->get('general.title', 'Shaarli'));
1423         $PAGE->renderPage('editlink');
1424         exit;
1425     }
1426
1427     if ($targetPage == Router::$PAGE_PINLINK) {
1428         if (! isset($_GET['id']) || !$bookmarkService->exists($_GET['id'])) {
1429             // FIXME! Use a proper error system.
1430             $msg = t('Invalid link ID provided');
1431             echo '<script>alert("'. $msg .'");document.location=\''. index_url($_SERVER) .'\';</script>';
1432             exit;
1433         }
1434         if (! $sessionManager->checkToken($_GET['token'])) {
1435             die('Wrong token.');
1436         }
1437
1438         $link = $bookmarkService->get($_GET['id']);
1439         $link->setSticky(! $link->isSticky());
1440         $bookmarkService->set($link);
1441         header('Location: '.index_url($_SERVER));
1442         exit;
1443     }
1444
1445     if ($targetPage == Router::$PAGE_EXPORT) {
1446         // Export bookmarks as a Netscape Bookmarks file
1447
1448         if (empty($_GET['selection'])) {
1449             $PAGE->assign('pagetitle', t('Export') .' - '. $conf->get('general.title', 'Shaarli'));
1450             $PAGE->renderPage('export');
1451             exit;
1452         }
1453
1454         // export as bookmarks_(all|private|public)_YYYYmmdd_HHMMSS.html
1455         $selection = $_GET['selection'];
1456         if (isset($_GET['prepend_note_url'])) {
1457             $prependNoteUrl = $_GET['prepend_note_url'];
1458         } else {
1459             $prependNoteUrl = false;
1460         }
1461
1462         try {
1463             $factory = new FormatterFactory($conf, $loginManager->isLoggedIn());
1464             $formatter = $factory->getFormatter('raw');
1465             $PAGE->assign(
1466                 'links',
1467                 NetscapeBookmarkUtils::filterAndFormat(
1468                     $bookmarkService,
1469                     $formatter,
1470                     $selection,
1471                     $prependNoteUrl,
1472                     index_url($_SERVER)
1473                 )
1474             );
1475         } catch (Exception $exc) {
1476             header('Content-Type: text/plain; charset=utf-8');
1477             echo $exc->getMessage();
1478             exit;
1479         }
1480         $now = new DateTime();
1481         header('Content-Type: text/html; charset=utf-8');
1482         header(
1483             'Content-disposition: attachment; filename=bookmarks_'
1484             .$selection.'_'.$now->format(Bookmark::LINK_DATE_FORMAT).'.html'
1485         );
1486         $PAGE->assign('date', $now->format(DateTime::RFC822));
1487         $PAGE->assign('eol', PHP_EOL);
1488         $PAGE->assign('selection', $selection);
1489         $PAGE->renderPage('export.bookmarks');
1490         exit;
1491     }
1492
1493     if ($targetPage == Router::$PAGE_IMPORT) {
1494         // Upload a Netscape bookmark dump to import its contents
1495
1496         if (! isset($_POST['token']) || ! isset($_FILES['filetoupload'])) {
1497             // Show import dialog
1498             $PAGE->assign(
1499                 'maxfilesize',
1500                 get_max_upload_size(
1501                     ini_get('post_max_size'),
1502                     ini_get('upload_max_filesize'),
1503                     false
1504                 )
1505             );
1506             $PAGE->assign(
1507                 'maxfilesizeHuman',
1508                 get_max_upload_size(
1509                     ini_get('post_max_size'),
1510                     ini_get('upload_max_filesize'),
1511                     true
1512                 )
1513             );
1514             $PAGE->assign('pagetitle', t('Import') .' - '. $conf->get('general.title', 'Shaarli'));
1515             $PAGE->renderPage('import');
1516             exit;
1517         }
1518
1519         // Import bookmarks from an uploaded file
1520         if (isset($_FILES['filetoupload']['size']) && $_FILES['filetoupload']['size'] == 0) {
1521             // The file is too big or some form field may be missing.
1522             $msg = sprintf(
1523                 t(
1524                     'The file you are trying to upload is probably bigger than what this webserver can accept'
1525                     .' (%s). Please upload in smaller chunks.'
1526                 ),
1527                 get_max_upload_size(ini_get('post_max_size'), ini_get('upload_max_filesize'))
1528             );
1529             echo '<script>alert("'. $msg .'");document.location=\'?do='.Router::$PAGE_IMPORT .'\';</script>';
1530             exit;
1531         }
1532         if (! $sessionManager->checkToken($_POST['token'])) {
1533             die('Wrong token.');
1534         }
1535         $status = NetscapeBookmarkUtils::import(
1536             $_POST,
1537             $_FILES,
1538             $bookmarkService,
1539             $conf,
1540             $history
1541         );
1542         echo '<script>alert("'.$status.'");document.location=\'?do='
1543              .Router::$PAGE_IMPORT .'\';</script>';
1544         exit;
1545     }
1546
1547     // Plugin administration page
1548     if ($targetPage == Router::$PAGE_PLUGINSADMIN) {
1549         $pluginMeta = $pluginManager->getPluginsMeta();
1550
1551         // Split plugins into 2 arrays: ordered enabled plugins and disabled.
1552         $enabledPlugins = array_filter($pluginMeta, function ($v) {
1553             return $v['order'] !== false;
1554         });
1555         // Load parameters.
1556         $enabledPlugins = load_plugin_parameter_values($enabledPlugins, $conf->get('plugins', array()));
1557         uasort(
1558             $enabledPlugins,
1559             function ($a, $b) {
1560                 return $a['order'] - $b['order'];
1561             }
1562         );
1563         $disabledPlugins = array_filter($pluginMeta, function ($v) {
1564             return $v['order'] === false;
1565         });
1566
1567         $PAGE->assign('enabledPlugins', $enabledPlugins);
1568         $PAGE->assign('disabledPlugins', $disabledPlugins);
1569         $PAGE->assign('pagetitle', t('Plugin administration') .' - '. $conf->get('general.title', 'Shaarli'));
1570         $PAGE->renderPage('pluginsadmin');
1571         exit;
1572     }
1573
1574     // Plugin administration form action
1575     if ($targetPage == Router::$PAGE_SAVE_PLUGINSADMIN) {
1576         try {
1577             if (isset($_POST['parameters_form'])) {
1578                 $pluginManager->executeHooks('save_plugin_parameters', $_POST);
1579                 unset($_POST['parameters_form']);
1580                 foreach ($_POST as $param => $value) {
1581                     $conf->set('plugins.'. $param, escape($value));
1582                 }
1583             } else {
1584                 $conf->set('general.enabled_plugins', save_plugin_config($_POST));
1585             }
1586             $conf->write($loginManager->isLoggedIn());
1587             $history->updateSettings();
1588         } catch (Exception $e) {
1589             error_log(
1590                 'ERROR while saving plugin configuration:.' . PHP_EOL .
1591                 $e->getMessage()
1592             );
1593
1594             // TODO: do not handle exceptions/errors in JS.
1595             echo '<script>alert("'
1596                 . $e->getMessage()
1597                 .'");document.location=\'?do='
1598                 . Router::$PAGE_PLUGINSADMIN
1599                 .'\';</script>';
1600             exit;
1601         }
1602         header('Location: ?do='. Router::$PAGE_PLUGINSADMIN);
1603         exit;
1604     }
1605
1606     // Get a fresh token
1607     if ($targetPage == Router::$GET_TOKEN) {
1608         header('Content-Type:text/plain');
1609         echo $sessionManager->generateToken();
1610         exit;
1611     }
1612
1613     // -------- Thumbnails Update
1614     if ($targetPage == Router::$PAGE_THUMBS_UPDATE) {
1615         $ids = [];
1616         foreach ($bookmarkService->search() as $bookmark) {
1617             // A note or not HTTP(S)
1618             if ($bookmark->isNote() || ! startsWith(strtolower($bookmark->getUrl()), 'http')) {
1619                 continue;
1620             }
1621             $ids[] = $bookmark->getId();
1622         }
1623         $PAGE->assign('ids', $ids);
1624         $PAGE->assign('pagetitle', t('Thumbnails update') .' - '. $conf->get('general.title', 'Shaarli'));
1625         $PAGE->renderPage('thumbnails');
1626         exit;
1627     }
1628
1629     // -------- Single Thumbnail Update
1630     if ($targetPage == Router::$AJAX_THUMB_UPDATE) {
1631         if (! isset($_POST['id']) || ! ctype_digit($_POST['id'])) {
1632             http_response_code(400);
1633             exit;
1634         }
1635         $id = (int) $_POST['id'];
1636         if (! $bookmarkService->exists($id)) {
1637             http_response_code(404);
1638             exit;
1639         }
1640         $thumbnailer = new Thumbnailer($conf);
1641         $bookmark = $bookmarkService->get($id);
1642         $bookmark->setThumbnail($thumbnailer->get($bookmark->getUrl()));
1643         $bookmarkService->set($bookmark);
1644
1645         $factory = new FormatterFactory($conf, $loginManager->isLoggedIn());
1646         echo json_encode($factory->getFormatter('raw')->format($bookmark));
1647         exit;
1648     }
1649
1650     // -------- Otherwise, simply display search form and bookmarks:
1651     showLinkList($PAGE, $bookmarkService, $conf, $pluginManager, $loginManager);
1652     exit;
1653 }
1654
1655 /**
1656  * Template for the list of bookmarks (<div id="linklist">)
1657  * This function fills all the necessary fields in the $PAGE for the template 'linklist.html'
1658  *
1659  * @param pageBuilder              $PAGE          pageBuilder instance.
1660  * @param BookmarkServiceInterface $linkDb        LinkDB instance.
1661  * @param ConfigManager            $conf          Configuration Manager instance.
1662  * @param PluginManager            $pluginManager Plugin Manager instance.
1663  * @param LoginManager             $loginManager  LoginManager instance
1664  */
1665 function buildLinkList($PAGE, $linkDb, $conf, $pluginManager, $loginManager)
1666 {
1667     $factory = new FormatterFactory($conf, $loginManager->isLoggedIn());
1668     $formatter = $factory->getFormatter();
1669
1670     // Used in templates
1671     if (isset($_GET['searchtags'])) {
1672         if (! empty($_GET['searchtags'])) {
1673             $searchtags = escape(normalize_spaces($_GET['searchtags']));
1674         } else {
1675             $searchtags = false;
1676         }
1677     } else {
1678         $searchtags = '';
1679     }
1680     $searchterm = !empty($_GET['searchterm']) ? escape(normalize_spaces($_GET['searchterm'])) : '';
1681
1682     // Smallhash filter
1683     if (! empty($_SERVER['QUERY_STRING'])
1684         && preg_match('/^[a-zA-Z0-9-_@]{6}($|&|#)/', $_SERVER['QUERY_STRING'])) {
1685         try {
1686             $linksToDisplay = $linkDb->findByHash($_SERVER['QUERY_STRING']);
1687         } catch (BookmarkNotFoundException $e) {
1688             $PAGE->render404($e->getMessage());
1689             exit;
1690         }
1691     } else {
1692         // Filter bookmarks according search parameters.
1693         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : null;
1694         $request = [
1695             'searchtags' => $searchtags,
1696             'searchterm' => $searchterm,
1697         ];
1698         $linksToDisplay = $linkDb->search($request, $visibility, false, !empty($_SESSION['untaggedonly']));
1699     }
1700
1701     // ---- Handle paging.
1702     $keys = array();
1703     foreach ($linksToDisplay as $key => $value) {
1704         $keys[] = $key;
1705     }
1706
1707     // Select articles according to paging.
1708     $pagecount = ceil(count($keys) / $_SESSION['LINKS_PER_PAGE']);
1709     $pagecount = $pagecount == 0 ? 1 : $pagecount;
1710     $page= empty($_GET['page']) ? 1 : intval($_GET['page']);
1711     $page = $page < 1 ? 1 : $page;
1712     $page = $page > $pagecount ? $pagecount : $page;
1713     // Start index.
1714     $i = ($page-1) * $_SESSION['LINKS_PER_PAGE'];
1715     $end = $i + $_SESSION['LINKS_PER_PAGE'];
1716
1717     $thumbnailsEnabled = $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE) !== Thumbnailer::MODE_NONE;
1718     if ($thumbnailsEnabled) {
1719         $thumbnailer = new Thumbnailer($conf);
1720     }
1721
1722     $linkDisp = array();
1723     while ($i<$end && $i<count($keys)) {
1724         $link = $formatter->format($linksToDisplay[$keys[$i]]);
1725
1726         // Logged in, thumbnails enabled, not a note,
1727         // and (never retrieved yet or no valid cache file)
1728         if ($loginManager->isLoggedIn()
1729             && $thumbnailsEnabled
1730             && !$linksToDisplay[$keys[$i]]->isNote()
1731             && $linksToDisplay[$keys[$i]]->getThumbnail() !== false
1732             && ! is_file($linksToDisplay[$keys[$i]]->getThumbnail())
1733         ) {
1734             $linksToDisplay[$keys[$i]]->setThumbnail($thumbnailer->get($link['url']));
1735             $linkDb->set($linksToDisplay[$keys[$i]], false);
1736             $updateDB = true;
1737             $link['thumbnail'] = $linksToDisplay[$keys[$i]]->getThumbnail();
1738         }
1739
1740         // Check for both signs of a note: starting with ? and 7 chars long.
1741 //        if ($link['url'][0] === '?' && strlen($link['url']) === 7) {
1742 //            $link['url'] = index_url($_SERVER) . $link['url'];
1743 //        }
1744
1745         $linkDisp[$keys[$i]] = $link;
1746         $i++;
1747     }
1748
1749     // If we retrieved new thumbnails, we update the database.
1750     if (!empty($updateDB)) {
1751         $linkDb->save();
1752     }
1753
1754     // Compute paging navigation
1755     $searchtagsUrl = $searchtags === '' ? '' : '&searchtags=' . urlencode($searchtags);
1756     $searchtermUrl = empty($searchterm) ? '' : '&searchterm=' . urlencode($searchterm);
1757     $previous_page_url = '';
1758     if ($i != count($keys)) {
1759         $previous_page_url = '?page=' . ($page+1) . $searchtermUrl . $searchtagsUrl;
1760     }
1761     $next_page_url='';
1762     if ($page>1) {
1763         $next_page_url = '?page=' . ($page-1) . $searchtermUrl . $searchtagsUrl;
1764     }
1765
1766     // Fill all template fields.
1767     $data = array(
1768         'previous_page_url' => $previous_page_url,
1769         'next_page_url' => $next_page_url,
1770         'page_current' => $page,
1771         'page_max' => $pagecount,
1772         'result_count' => count($linksToDisplay),
1773         'search_term' => $searchterm,
1774         'search_tags' => $searchtags,
1775         'visibility' => ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '',
1776         'links' => $linkDisp,
1777     );
1778
1779     // If there is only a single link, we change on-the-fly the title of the page.
1780     if (count($linksToDisplay) == 1) {
1781         $data['pagetitle'] = $linksToDisplay[$keys[0]]->getTitle() .' - '. $conf->get('general.title');
1782     } elseif (! empty($searchterm) || ! empty($searchtags)) {
1783         $data['pagetitle'] = t('Search: ');
1784         $data['pagetitle'] .= ! empty($searchterm) ? $searchterm .' ' : '';
1785         $bracketWrap = function ($tag) {
1786             return '['. $tag .']';
1787         };
1788         $data['pagetitle'] .= ! empty($searchtags)
1789             ? implode(' ', array_map($bracketWrap, preg_split('/\s+/', $searchtags))).' '
1790             : '';
1791         $data['pagetitle'] .= '- '. $conf->get('general.title');
1792     }
1793
1794     $pluginManager->executeHooks('render_linklist', $data, array('loggedin' => $loginManager->isLoggedIn()));
1795
1796     foreach ($data as $key => $value) {
1797         $PAGE->assign($key, $value);
1798     }
1799
1800     return;
1801 }
1802
1803 /**
1804  * Installation
1805  * This function should NEVER be called if the file data/config.php exists.
1806  *
1807  * @param ConfigManager  $conf           Configuration Manager instance.
1808  * @param SessionManager $sessionManager SessionManager instance
1809  * @param LoginManager   $loginManager   LoginManager instance
1810  */
1811 function install($conf, $sessionManager, $loginManager)
1812 {
1813     // On free.fr host, make sure the /sessions directory exists, otherwise login will not work.
1814     if (endsWith($_SERVER['HTTP_HOST'], '.free.fr') && !is_dir($_SERVER['DOCUMENT_ROOT'].'/sessions')) {
1815         mkdir($_SERVER['DOCUMENT_ROOT'].'/sessions', 0705);
1816     }
1817
1818
1819     // This part makes sure sessions works correctly.
1820     // (Because on some hosts, session.save_path may not be set correctly,
1821     // or we may not have write access to it.)
1822     if (isset($_GET['test_session'])
1823         && ( !isset($_SESSION) || !isset($_SESSION['session_tested']) || $_SESSION['session_tested']!='Working')) {
1824         // Step 2: Check if data in session is correct.
1825         $msg = t(
1826             '<pre>Sessions do not seem to work correctly on your server.<br>'.
1827             'Make sure the variable "session.save_path" is set correctly in your PHP config, '.
1828             'and that you have write access to it.<br>'.
1829             'It currently points to %s.<br>'.
1830             'On some browsers, accessing your server via a hostname like \'localhost\' '.
1831             'or any custom hostname without a dot causes cookie storage to fail. '.
1832             'We recommend accessing your server via it\'s IP address or Fully Qualified Domain Name.<br>'
1833         );
1834         $msg = sprintf($msg, session_save_path());
1835         echo $msg;
1836         echo '<br><a href="?">'. t('Click to try again.') .'</a></pre>';
1837         die;
1838     }
1839     if (!isset($_SESSION['session_tested'])) {
1840         // Step 1 : Try to store data in session and reload page.
1841         $_SESSION['session_tested'] = 'Working';  // Try to set a variable in session.
1842         header('Location: '.index_url($_SERVER).'?test_session');  // Redirect to check stored data.
1843     }
1844     if (isset($_GET['test_session'])) {
1845         // Step 3: Sessions are OK. Remove test parameter from URL.
1846         header('Location: '.index_url($_SERVER));
1847     }
1848
1849
1850     if (!empty($_POST['setlogin']) && !empty($_POST['setpassword'])) {
1851         $tz = 'UTC';
1852         if (!empty($_POST['continent']) && !empty($_POST['city'])
1853             && isTimeZoneValid($_POST['continent'], $_POST['city'])
1854         ) {
1855             $tz = $_POST['continent'].'/'.$_POST['city'];
1856         }
1857         $conf->set('general.timezone', $tz);
1858         $login = $_POST['setlogin'];
1859         $conf->set('credentials.login', $login);
1860         $salt = sha1(uniqid('', true) .'_'. mt_rand());
1861         $conf->set('credentials.salt', $salt);
1862         $conf->set('credentials.hash', sha1($_POST['setpassword'] . $login . $salt));
1863         if (!empty($_POST['title'])) {
1864             $conf->set('general.title', escape($_POST['title']));
1865         } else {
1866             $conf->set('general.title', 'Shared bookmarks on '.escape(index_url($_SERVER)));
1867         }
1868         $conf->set('translation.language', escape($_POST['language']));
1869         $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1870         $conf->set('api.enabled', !empty($_POST['enableApi']));
1871         $conf->set(
1872             'api.secret',
1873             generate_api_secret(
1874                 $conf->get('credentials.login'),
1875                 $conf->get('credentials.salt')
1876             )
1877         );
1878         try {
1879             // Everything is ok, let's create config file.
1880             $conf->write($loginManager->isLoggedIn());
1881         } catch (Exception $e) {
1882             error_log(
1883                 'ERROR while writing config file after installation.' . PHP_EOL .
1884                     $e->getMessage()
1885             );
1886
1887             // TODO: do not handle exceptions/errors in JS.
1888             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?\';</script>';
1889             exit;
1890         }
1891
1892         $history = new History($conf->get('resource.history'));
1893         $bookmarkService = new BookmarkFileService($conf, $history, true);
1894         if ($bookmarkService->count() === 0) {
1895             $bookmarkService->initialize();
1896         }
1897
1898         echo '<script>alert('
1899             .'"Shaarli is now configured. '
1900             .'Please enter your login/password and start shaaring your bookmarks!"'
1901             .');document.location=\'?do=login\';</script>';
1902         exit;
1903     }
1904
1905     $PAGE = new PageBuilder($conf, $_SESSION, null, $sessionManager->generateToken());
1906     list($continents, $cities) = generateTimeZoneData(timezone_identifiers_list(), date_default_timezone_get());
1907     $PAGE->assign('continents', $continents);
1908     $PAGE->assign('cities', $cities);
1909     $PAGE->assign('languages', Languages::getAvailableLanguages());
1910     $PAGE->renderPage('install');
1911     exit;
1912 }
1913
1914 if (!isset($_SESSION['LINKS_PER_PAGE'])) {
1915     $_SESSION['LINKS_PER_PAGE'] = $conf->get('general.links_per_page', 20);
1916 }
1917
1918 try {
1919     $history = new History($conf->get('resource.history'));
1920 } catch (Exception $e) {
1921     die($e->getMessage());
1922 }
1923
1924 $linkDb = new BookmarkFileService($conf, $history, $loginManager->isLoggedIn());
1925
1926 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=dailyrss')) {
1927     showDailyRSS($linkDb, $conf, $loginManager);
1928     exit;
1929 }
1930
1931 $container = new \Slim\Container();
1932 $container['conf'] = $conf;
1933 $container['plugins'] = $pluginManager;
1934 $container['history'] = $history;
1935 $app = new \Slim\App($container);
1936
1937 // REST API routes
1938 $app->group('/api/v1', function () {
1939     $this->get('/info', '\Shaarli\Api\Controllers\Info:getInfo')->setName('getInfo');
1940     $this->get('/bookmarks', '\Shaarli\Api\Controllers\Links:getLinks')->setName('getLinks');
1941     $this->get('/bookmarks/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:getLink')->setName('getLink');
1942     $this->post('/bookmarks', '\Shaarli\Api\Controllers\Links:postLink')->setName('postLink');
1943     $this->put('/bookmarks/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:putLink')->setName('putLink');
1944     $this->delete('/bookmarks/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:deleteLink')->setName('deleteLink');
1945
1946     $this->get('/tags', '\Shaarli\Api\Controllers\Tags:getTags')->setName('getTags');
1947     $this->get('/tags/{tagName:[\w]+}', '\Shaarli\Api\Controllers\Tags:getTag')->setName('getTag');
1948     $this->put('/tags/{tagName:[\w]+}', '\Shaarli\Api\Controllers\Tags:putTag')->setName('putTag');
1949     $this->delete('/tags/{tagName:[\w]+}', '\Shaarli\Api\Controllers\Tags:deleteTag')->setName('deleteTag');
1950
1951     $this->get('/history', '\Shaarli\Api\Controllers\HistoryController:getHistory')->setName('getHistory');
1952 })->add('\Shaarli\Api\ApiMiddleware');
1953
1954 $response = $app->run(true);
1955
1956 // Hack to make Slim and Shaarli router work together:
1957 // If a Slim route isn't found and NOT API call, we call renderPage().
1958 if ($response->getStatusCode() == 404 && strpos($_SERVER['REQUEST_URI'], '/api/v1') === false) {
1959     // We use UTF-8 for proper international characters handling.
1960     header('Content-Type: text/html; charset=utf-8');
1961     renderPage($conf, $pluginManager, $linkDb, $history, $sessionManager, $loginManager);
1962 } else {
1963     $response = $response
1964         ->withHeader('Access-Control-Allow-Origin', '*')
1965         ->withHeader(
1966             'Access-Control-Allow-Headers',
1967             'X-Requested-With, Content-Type, Accept, Origin, Authorization'
1968         )
1969         ->withHeader('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE, OPTIONS');
1970     $app->respond($response);
1971 }