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