index.php

   1 <?php
   2 /**
   3  * Shaarli - The personal, minimalist, super-fast, database free, bookmarking service.
   4  *
   5  * Friendly fork by the Shaarli community:
   6  *  - https://github.com/shaarli/Shaarli
   7  *
   8  * Original project by sebsauvage.net:
   9  *  - http://sebsauvage.net/wiki/doku.php?id=php:shaarli
  10  *  - https://github.com/sebsauvage/Shaarli
  11  *
  12  * Licence: http://www.opensource.org/licenses/zlib-license.php
  13  *
  14  * Requires: PHP 5.5.x
  15  */
  16
  17 // Set 'UTC' as the default timezone if it is not defined in php.ini
  18 // See http://php.net/manual/en/datetime.configuration.php#ini.date.timezone
  19 if (date_default_timezone_get() == '') {
  20     date_default_timezone_set('UTC');
  21 }
  22
  23 /*
  24  * PHP configuration
  25  */
  26
  27 // http://server.com/x/shaarli --> /shaarli/
  28 define('WEB_PATH', substr($_SERVER['REQUEST_URI'], 0, 1+strrpos($_SERVER['REQUEST_URI'], '/', 0)));
  29
  30 // High execution time in case of problematic imports/exports.
  31 ini_set('max_input_time', '60');
  32
  33 // Try to set max upload file size and read
  34 ini_set('memory_limit', '128M');
  35 ini_set('post_max_size', '16M');
  36 ini_set('upload_max_filesize', '16M');
  37
  38 // See all error except warnings
  39 error_reporting(E_ALL^E_WARNING);
  40 // See all errors (for debugging only)
  41 //error_reporting(-1);
  42
  43
  44 // 3rd-party libraries
  45 if (! file_exists(__DIR__ . '/vendor/autoload.php')) {
  46     header('Content-Type: text/plain; charset=utf-8');
  47     echo "Error: missing Composer configuration\n\n"
  48         ."If you installed Shaarli through Git or using the development branch,\n"
  49         ."please refer to the installation documentation to install PHP"
  50         ." dependencies using Composer:\n"
  51         ."- https://shaarli.readthedocs.io/en/master/Server-configuration/\n"
  52         ."- https://shaarli.readthedocs.io/en/master/Download-and-Installation/";
  53     exit;
  54 }
  55 require_once 'inc/rain.tpl.class.php';
  56 require_once __DIR__ . '/vendor/autoload.php';
  57
  58 // Shaarli library
  59 require_once 'application/ApplicationUtils.php';
  60 require_once 'application/config/ConfigPlugin.php';
  61 require_once 'application/feed/Cache.php';
  62 require_once 'application/FileUtils.php';
  63 require_once 'application/History.php';
  64 require_once 'application/HttpUtils.php';
  65 require_once 'application/LinkDB.php';
  66 require_once 'application/LinkFilter.php';
  67 require_once 'application/LinkUtils.php';
  68 require_once 'application/NetscapeBookmarkUtils.php';
  69 require_once 'application/PageBuilder.php';
  70 require_once 'application/TimeZone.php';
  71 require_once 'application/Url.php';
  72 require_once 'application/Utils.php';
  73 require_once 'application/PluginManager.php';
  74 require_once 'application/Router.php';
  75 require_once 'application/Updater.php';
  76 use \Shaarli\Config\ConfigManager;
  77 use \Shaarli\Feed\CachedPage;
  78 use \Shaarli\Feed\FeedBuilder;
  79 use \Shaarli\History;
  80 use \Shaarli\Languages;
  81 use \Shaarli\Security\LoginManager;
  82 use \Shaarli\Security\SessionManager;
  83 use \Shaarli\ThemeUtils;
  84 use \Shaarli\Thumbnailer;
  85
  86 // Ensure the PHP version is supported
  87 try {
  88     ApplicationUtils::checkPHPVersion('5.5', PHP_VERSION);
  89 } catch (Exception $exc) {
  90     header('Content-Type: text/plain; charset=utf-8');
  91     echo $exc->getMessage();
  92     exit;
  93 }
  94
  95 define('SHAARLI_VERSION', ApplicationUtils::getVersion(__DIR__ .'/'. ApplicationUtils::$VERSION_FILE));
  96
  97 // Force cookie path (but do not change lifetime)
  98 $cookie = session_get_cookie_params();
  99 $cookiedir = '';
 100 if (dirname($_SERVER['SCRIPT_NAME']) != '/') {
 101     $cookiedir = dirname($_SERVER["SCRIPT_NAME"]).'/';
 102 }
 103 // Set default cookie expiration and path.
 104 session_set_cookie_params($cookie['lifetime'], $cookiedir, $_SERVER['SERVER_NAME']);
 105 // Set session parameters on server side.
 106 // Use cookies to store session.
 107 ini_set('session.use_cookies', 1);
 108 // Force cookies for session (phpsessionID forbidden in URL).
 109 ini_set('session.use_only_cookies', 1);
 110 // Prevent PHP form using sessionID in URL if cookies are disabled.
 111 ini_set('session.use_trans_sid', false);
 112
 113 session_name('shaarli');
 114 // Start session if needed (Some server auto-start sessions).
 115 if (session_status() == PHP_SESSION_NONE) {
 116     session_start();
 117 }
 118
 119 // Regenerate session ID if invalid or not defined in cookie.
 120 if (isset($_COOKIE['shaarli']) && !SessionManager::checkId($_COOKIE['shaarli'])) {
 121     session_regenerate_id(true);
 122     $_COOKIE['shaarli'] = session_id();
 123 }
 124
 125 $conf = new ConfigManager();
 126 $sessionManager = new SessionManager($_SESSION, $conf);
 127 $loginManager = new LoginManager($GLOBALS, $conf, $sessionManager);
 128 $loginManager->generateStaySignedInToken($_SERVER['REMOTE_ADDR']);
 129 $clientIpId = client_ip_id($_SERVER);
 130
 131 // LC_MESSAGES isn't defined without php-intl, in this case use LC_COLLATE locale instead.
 132 if (! defined('LC_MESSAGES')) {
 133     define('LC_MESSAGES', LC_COLLATE);
 134 }
 135
 136 // Sniff browser language and set date format accordingly.
 137 if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
 138     autoLocale($_SERVER['HTTP_ACCEPT_LANGUAGE']);
 139 }
 140
 141 new Languages(setlocale(LC_MESSAGES, 0), $conf);
 142
 143 $conf->setEmpty('general.timezone', date_default_timezone_get());
 144 $conf->setEmpty('general.title', t('Shared links on '). escape(index_url($_SERVER)));
 145 RainTPL::$tpl_dir = $conf->get('resource.raintpl_tpl').'/'.$conf->get('resource.theme').'/'; // template directory
 146 RainTPL::$cache_dir = $conf->get('resource.raintpl_tmp'); // cache directory
 147
 148 $pluginManager = new PluginManager($conf);
 149 $pluginManager->load($conf->get('general.enabled_plugins'));
 150
 151 date_default_timezone_set($conf->get('general.timezone', 'UTC'));
 152
 153 ob_start();  // Output buffering for the page cache.
 154
 155 // Prevent caching on client side or proxy: (yes, it's ugly)
 156 header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
 157 header("Cache-Control: no-store, no-cache, must-revalidate");
 158 header("Cache-Control: post-check=0, pre-check=0", false);
 159 header("Pragma: no-cache");
 160
 161 if (! is_file($conf->getConfigFileExt())) {
 162     // Ensure Shaarli has proper access to its resources
 163     $errors = ApplicationUtils::checkResourcePermissions($conf);
 164
 165     if ($errors != array()) {
 166         $message = '<p>'. t('Insufficient permissions:') .'</p><ul>';
 167
 168         foreach ($errors as $error) {
 169             $message .= '<li>'.$error.'</li>';
 170         }
 171         $message .= '</ul>';
 172
 173         header('Content-Type: text/html; charset=utf-8');
 174         echo $message;
 175         exit;
 176     }
 177
 178     // Display the installation form if no existing config is found
 179     install($conf, $sessionManager, $loginManager);
 180 }
 181
 182 $loginManager->checkLoginState($_COOKIE, $clientIpId);
 183
 184 /**
 185  * Adapter function to ensure compatibility with third-party templates
 186  *
 187  * @see https://github.com/shaarli/Shaarli/pull/1086
 188  *
 189  * @return bool true when the user is logged in, false otherwise
 190  */
 191 function isLoggedIn()
 192 {
 193     global $loginManager;
 194     return $loginManager->isLoggedIn();
 195 }
 196
 197
 198 // ------------------------------------------------------------------------------------------
 199 // Process login form: Check if login/password is correct.
 200 if (isset($_POST['login'])) {
 201     if (! $loginManager->canLogin($_SERVER)) {
 202         die(t('I said: NO. You are banned for the moment. Go away.'));
 203     }
 204     if (isset($_POST['password'])
 205         && $sessionManager->checkToken($_POST['token'])
 206         && $loginManager->checkCredentials($_SERVER['REMOTE_ADDR'], $clientIpId, $_POST['login'], $_POST['password'])
 207     ) {
 208         $loginManager->handleSuccessfulLogin($_SERVER);
 209
 210         $cookiedir = '';
 211         if (dirname($_SERVER['SCRIPT_NAME']) != '/') {
 212             // Note: Never forget the trailing slash on the cookie path!
 213             $cookiedir = dirname($_SERVER["SCRIPT_NAME"]) . '/';
 214         }
 215
 216         if (!empty($_POST['longlastingsession'])) {
 217             // Keep the session cookie even after the browser closes
 218             $sessionManager->setStaySignedIn(true);
 219             $expirationTime = $sessionManager->extendSession();
 220
 221             setcookie(
 222                 $loginManager::$STAY_SIGNED_IN_COOKIE,
 223                 $loginManager->getStaySignedInToken(),
 224                 $expirationTime,
 225                 WEB_PATH
 226             );
 227         } else {
 228             // Standard session expiration (=when browser closes)
 229             $expirationTime = 0;
 230         }
 231
 232         // Send cookie with the new expiration date to the browser
 233         session_set_cookie_params($expirationTime, $cookiedir, $_SERVER['SERVER_NAME']);
 234         session_regenerate_id(true);
 235
 236         // Optional redirect after login:
 237         if (isset($_GET['post'])) {
 238             $uri = '?post='. urlencode($_GET['post']);
 239             foreach (array('description', 'source', 'title', 'tags') as $param) {
 240                 if (!empty($_GET[$param])) {
 241                     $uri .= '&'.$param.'='.urlencode($_GET[$param]);
 242                 }
 243             }
 244             header('Location: '. $uri);
 245             exit;
 246         }
 247
 248         if (isset($_GET['edit_link'])) {
 249             header('Location: ?edit_link='. escape($_GET['edit_link']));
 250             exit;
 251         }
 252
 253         if (isset($_POST['returnurl'])) {
 254             // Prevent loops over login screen.
 255             if (strpos($_POST['returnurl'], 'do=login') === false) {
 256                 header('Location: '. generateLocation($_POST['returnurl'], $_SERVER['HTTP_HOST']));
 257                 exit;
 258             }
 259         }
 260         header('Location: ?');
 261         exit;
 262     } else {
 263         $loginManager->handleFailedLogin($_SERVER);
 264         $redir = '&username='. urlencode($_POST['login']);
 265         if (isset($_GET['post'])) {
 266             $redir .= '&post=' . urlencode($_GET['post']);
 267             foreach (array('description', 'source', 'title', 'tags') as $param) {
 268                 if (!empty($_GET[$param])) {
 269                     $redir .= '&' . $param . '=' . urlencode($_GET[$param]);
 270                 }
 271             }
 272         }
 273         // Redirect to login screen.
 274         echo '<script>alert("'. t("Wrong login/password.") .'");document.location=\'?do=login'.$redir.'\';</script>';
 275         exit;
 276     }
 277 }
 278
 279 // ------------------------------------------------------------------------------------------
 280 // Token management for XSRF protection
 281 // Token should be used in any form which acts on data (create,update,delete,import...).
 282 if (!isset($_SESSION['tokens'])) {
 283     $_SESSION['tokens']=array();  // Token are attached to the session.
 284 }
 285
 286 /**
 287  * Daily RSS feed: 1 RSS entry per day giving all the links on that day.
 288  * Gives the last 7 days (which have links).
 289  * This RSS feed cannot be filtered.
 290  *
 291  * @param ConfigManager $conf         Configuration Manager instance
 292  * @param LoginManager  $loginManager LoginManager instance
 293  */
 294 function showDailyRSS($conf, $loginManager)
 295 {
 296     // Cache system
 297     $query = $_SERVER['QUERY_STRING'];
 298     $cache = new CachedPage(
 299         $conf->get('config.PAGE_CACHE'),
 300         page_url($_SERVER),
 301         startsWith($query, 'do=dailyrss') && !$loginManager->isLoggedIn()
 302     );
 303     $cached = $cache->cachedVersion();
 304     if (!empty($cached)) {
 305         echo $cached;
 306         exit;
 307     }
 308
 309     // If cached was not found (or not usable), then read the database and build the response:
 310     // Read links from database (and filter private links if used it not logged in).
 311     $LINKSDB = new LinkDB(
 312         $conf->get('resource.datastore'),
 313         $loginManager->isLoggedIn(),
 314         $conf->get('privacy.hide_public_links'),
 315         $conf->get('redirector.url'),
 316         $conf->get('redirector.encode_url')
 317     );
 318
 319     /* Some Shaarlies may have very few links, so we need to look
 320        back in time until we have enough days ($nb_of_days).
 321     */
 322     $nb_of_days = 7; // We take 7 days.
 323     $today = date('Ymd');
 324     $days = array();
 325
 326     foreach ($LINKSDB as $link) {
 327         $day = $link['created']->format('Ymd'); // Extract day (without time)
 328         if (strcmp($day, $today) < 0) {
 329             if (empty($days[$day])) {
 330                 $days[$day] = array();
 331             }
 332             $days[$day][] = $link;
 333         }
 334
 335         if (count($days) > $nb_of_days) {
 336             break; // Have we collected enough days?
 337         }
 338     }
 339
 340     // Build the RSS feed.
 341     header('Content-Type: application/rss+xml; charset=utf-8');
 342     $pageaddr = escape(index_url($_SERVER));
 343     echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0">';
 344     echo '<channel>';
 345     echo '<title>Daily - '. $conf->get('general.title') . '</title>';
 346     echo '<link>'. $pageaddr .'</link>';
 347     echo '<description>Daily shared links</description>';
 348     echo '<language>en-en</language>';
 349     echo '<copyright>'. $pageaddr .'</copyright>'. PHP_EOL;
 350
 351     // For each day.
 352     foreach ($days as $day => $links) {
 353         $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 354         $absurl = escape(index_url($_SERVER).'?do=daily&day='.$day);  // Absolute URL of the corresponding "Daily" page.
 355
 356         // We pre-format some fields for proper output.
 357         foreach ($links as &$link) {
 358             $link['formatedDescription'] = format_description(
 359                 $link['description'],
 360                 $conf->get('redirector.url'),
 361                 $conf->get('redirector.encode_url')
 362             );
 363             $link['timestamp'] = $link['created']->getTimestamp();
 364             if (startsWith($link['url'], '?')) {
 365                 $link['url'] = index_url($_SERVER) . $link['url'];  // make permalink URL absolute
 366             }
 367         }
 368
 369         // Then build the HTML for this day:
 370         $tpl = new RainTPL;
 371         $tpl->assign('title', $conf->get('general.title'));
 372         $tpl->assign('daydate', $dayDate->getTimestamp());
 373         $tpl->assign('absurl', $absurl);
 374         $tpl->assign('links', $links);
 375         $tpl->assign('rssdate', escape($dayDate->format(DateTime::RSS)));
 376         $tpl->assign('hide_timestamps', $conf->get('privacy.hide_timestamps', false));
 377         $tpl->assign('index_url', $pageaddr);
 378         $html = $tpl->draw('dailyrss', true);
 379
 380         echo $html . PHP_EOL;
 381     }
 382     echo '</channel></rss><!-- Cached version of '. escape(page_url($_SERVER)) .' -->';
 383
 384     $cache->cache(ob_get_contents());
 385     ob_end_flush();
 386     exit;
 387 }
 388
 389 /**
 390  * Show the 'Daily' page.
 391  *
 392  * @param PageBuilder   $pageBuilder   Template engine wrapper.
 393  * @param LinkDB        $LINKSDB       LinkDB instance.
 394  * @param ConfigManager $conf          Configuration Manager instance.
 395  * @param PluginManager $pluginManager Plugin Manager instance.
 396  * @param LoginManager  $loginManager  Login Manager instance
 397  */
 398 function showDaily($pageBuilder, $LINKSDB, $conf, $pluginManager, $loginManager)
 399 {
 400     $day = date('Ymd', strtotime('-1 day')); // Yesterday, in format YYYYMMDD.
 401     if (isset($_GET['day'])) {
 402         $day = $_GET['day'];
 403     }
 404
 405     $days = $LINKSDB->days();
 406     $i = array_search($day, $days);
 407     if ($i === false && count($days)) {
 408         // no links for day, but at least one day with links
 409         $i = count($days) - 1;
 410         $day = $days[$i];
 411     }
 412     $previousday = '';
 413     $nextday = '';
 414
 415     if ($i !== false) {
 416         if ($i >= 1) {
 417              $previousday=$days[$i - 1];
 418         }
 419         if ($i < count($days) - 1) {
 420             $nextday = $days[$i + 1];
 421         }
 422     }
 423     try {
 424         $linksToDisplay = $LINKSDB->filterDay($day);
 425     } catch (Exception $exc) {
 426         error_log($exc);
 427         $linksToDisplay = array();
 428     }
 429
 430     // We pre-format some fields for proper output.
 431     foreach ($linksToDisplay as $key => $link) {
 432         $taglist = explode(' ', $link['tags']);
 433         uasort($taglist, 'strcasecmp');
 434         $linksToDisplay[$key]['taglist']=$taglist;
 435         $linksToDisplay[$key]['formatedDescription'] = format_description(
 436             $link['description'],
 437             $conf->get('redirector.url'),
 438             $conf->get('redirector.encode_url')
 439         );
 440         $linksToDisplay[$key]['timestamp'] =  $link['created']->getTimestamp();
 441     }
 442
 443     $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 444     $data = array(
 445         'pagetitle' => $conf->get('general.title') .' - '. format_date($dayDate, false),
 446         'linksToDisplay' => $linksToDisplay,
 447         'day' => $dayDate->getTimestamp(),
 448         'dayDate' => $dayDate,
 449         'previousday' => $previousday,
 450         'nextday' => $nextday,
 451     );
 452
 453     /* Hook is called before column construction so that plugins don't have
 454        to deal with columns. */
 455     $pluginManager->executeHooks('render_daily', $data, array('loggedin' => $loginManager->isLoggedIn()));
 456
 457     /* We need to spread the articles on 3 columns.
 458        I did not want to use a JavaScript lib like http://masonry.desandro.com/
 459        so I manually spread entries with a simple method: I roughly evaluate the
 460        height of a div according to title and description length.
 461     */
 462     $columns = array(array(), array(), array()); // Entries to display, for each column.
 463     $fill = array(0, 0, 0);  // Rough estimate of columns fill.
 464     foreach ($data['linksToDisplay'] as $key => $link) {
 465         // Roughly estimate length of entry (by counting characters)
 466         // Title: 30 chars = 1 line. 1 line is 30 pixels height.
 467         // Description: 836 characters gives roughly 342 pixel height.
 468         // This is not perfect, but it's usually OK.
 469         $length = strlen($link['title']) + (342 * strlen($link['description'])) / 836;
 470         if ($link['thumbnail']) {
 471             $length += 100; // 1 thumbnails roughly takes 100 pixels height.
 472         }
 473         // Then put in column which is the less filled:
 474         $smallest = min($fill); // find smallest value in array.
 475         $index = array_search($smallest, $fill); // find index of this smallest value.
 476         array_push($columns[$index], $link); // Put entry in this column.
 477         $fill[$index] += $length;
 478     }
 479
 480     $data['cols'] = $columns;
 481
 482     foreach ($data as $key => $value) {
 483         $pageBuilder->assign($key, $value);
 484     }
 485
 486     $pageBuilder->assign('pagetitle', t('Daily') .' - '. $conf->get('general.title', 'Shaarli'));
 487     $pageBuilder->renderPage('daily');
 488     exit;
 489 }
 490
 491 /**
 492  * Renders the linklist
 493  *
 494  * @param pageBuilder   $PAGE    pageBuilder instance.
 495  * @param LinkDB        $LINKSDB LinkDB instance.
 496  * @param ConfigManager $conf    Configuration Manager instance.
 497  * @param PluginManager $pluginManager Plugin Manager instance.
 498  */
 499 function showLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager)
 500 {
 501     buildLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
 502     $PAGE->renderPage('linklist');
 503 }
 504
 505 /**
 506  * Render HTML page (according to URL parameters and user rights)
 507  *
 508  * @param ConfigManager  $conf           Configuration Manager instance.
 509  * @param PluginManager  $pluginManager  Plugin Manager instance,
 510  * @param LinkDB         $LINKSDB
 511  * @param History        $history        instance
 512  * @param SessionManager $sessionManager SessionManager instance
 513  * @param LoginManager   $loginManager   LoginManager instance
 514  */
 515 function renderPage($conf, $pluginManager, $LINKSDB, $history, $sessionManager, $loginManager)
 516 {
 517     $updater = new Updater(
 518         read_updates_file($conf->get('resource.updates')),
 519         $LINKSDB,
 520         $conf,
 521         $loginManager->isLoggedIn(),
 522         $_SESSION
 523     );
 524     try {
 525         $newUpdates = $updater->update();
 526         if (! empty($newUpdates)) {
 527             write_updates_file(
 528                 $conf->get('resource.updates'),
 529                 $updater->getDoneUpdates()
 530             );
 531         }
 532     } catch (Exception $e) {
 533         die($e->getMessage());
 534     }
 535
 536     $PAGE = new PageBuilder($conf, $_SESSION, $LINKSDB, $sessionManager->generateToken(), $loginManager->isLoggedIn());
 537     $PAGE->assign('linkcount', count($LINKSDB));
 538     $PAGE->assign('privateLinkcount', count_private($LINKSDB));
 539     $PAGE->assign('plugin_errors', $pluginManager->getErrors());
 540
 541     // Determine which page will be rendered.
 542     $query = (isset($_SERVER['QUERY_STRING'])) ? $_SERVER['QUERY_STRING'] : '';
 543     $targetPage = Router::findPage($query, $_GET, $loginManager->isLoggedIn());
 544
 545     if (// if the user isn't logged in
 546         !$loginManager->isLoggedIn() &&
 547         // and Shaarli doesn't have public content...
 548         $conf->get('privacy.hide_public_links') &&
 549         // and is configured to enforce the login
 550         $conf->get('privacy.force_login') &&
 551         // and the current page isn't already the login page
 552         $targetPage !== Router::$PAGE_LOGIN &&
 553         // and the user is not requesting a feed (which would lead to a different content-type as expected)
 554         $targetPage !== Router::$PAGE_FEED_ATOM &&
 555         $targetPage !== Router::$PAGE_FEED_RSS
 556     ) {
 557         // force current page to be the login page
 558         $targetPage = Router::$PAGE_LOGIN;
 559     }
 560
 561     // Call plugin hooks for header, footer and includes, specifying which page will be rendered.
 562     // Then assign generated data to RainTPL.
 563     $common_hooks = array(
 564         'includes',
 565         'header',
 566         'footer',
 567     );
 568
 569     foreach ($common_hooks as $name) {
 570         $plugin_data = array();
 571         $pluginManager->executeHooks(
 572             'render_' . $name,
 573             $plugin_data,
 574             array(
 575                 'target' => $targetPage,
 576                 'loggedin' => $loginManager->isLoggedIn()
 577             )
 578         );
 579         $PAGE->assign('plugins_' . $name, $plugin_data);
 580     }
 581
 582     // -------- Display login form.
 583     if ($targetPage == Router::$PAGE_LOGIN) {
 584         if ($conf->get('security.open_shaarli')) {
 585             header('Location: ?');
 586             exit;
 587         }  // No need to login for open Shaarli
 588         if (isset($_GET['username'])) {
 589             $PAGE->assign('username', escape($_GET['username']));
 590         }
 591         $PAGE->assign('returnurl', (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']):''));
 592         // add default state of the 'remember me' checkbox
 593         $PAGE->assign('remember_user_default', $conf->get('privacy.remember_user_default'));
 594         $PAGE->assign('user_can_login', $loginManager->canLogin($_SERVER));
 595         $PAGE->assign('pagetitle', t('Login') .' - '. $conf->get('general.title', 'Shaarli'));
 596         $PAGE->renderPage('loginform');
 597         exit;
 598     }
 599     // -------- User wants to logout.
 600     if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=logout')) {
 601         invalidateCaches($conf->get('resource.page_cache'));
 602         $sessionManager->logout();
 603         setcookie(LoginManager::$STAY_SIGNED_IN_COOKIE, 'false', 0, WEB_PATH);
 604         header('Location: ?');
 605         exit;
 606     }
 607
 608     // -------- Picture wall
 609     if ($targetPage == Router::$PAGE_PICWALL) {
 610         $PAGE->assign('pagetitle', t('Picture wall') .' - '. $conf->get('general.title', 'Shaarli'));
 611         if (! $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE) === Thumbnailer::MODE_NONE) {
 612             $PAGE->assign('linksToDisplay', []);
 613             $PAGE->renderPage('picwall');
 614             exit;
 615         }
 616
 617         // Optionally filter the results:
 618         $links = $LINKSDB->filterSearch($_GET);
 619         $linksToDisplay = array();
 620
 621         // Get only links which have a thumbnail.
 622         // Note: we do not retrieve thumbnails here, the request is too heavy.
 623         foreach ($links as $key => $link) {
 624             if (isset($link['thumbnail']) && $link['thumbnail'] !== false) {
 625                 $linksToDisplay[] = $link; // Add to array.
 626             }
 627         }
 628
 629         $data = array(
 630             'linksToDisplay' => $linksToDisplay,
 631         );
 632         $pluginManager->executeHooks('render_picwall', $data, array('loggedin' => $loginManager->isLoggedIn()));
 633
 634         foreach ($data as $key => $value) {
 635             $PAGE->assign($key, $value);
 636         }
 637
 638
 639         $PAGE->renderPage('picwall');
 640         exit;
 641     }
 642
 643     // -------- Tag cloud
 644     if ($targetPage == Router::$PAGE_TAGCLOUD) {
 645         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
 646         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 647         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 648
 649         // We sort tags alphabetically, then choose a font size according to count.
 650         // First, find max value.
 651         $maxcount = 0;
 652         foreach ($tags as $value) {
 653             $maxcount = max($maxcount, $value);
 654         }
 655
 656         alphabetical_sort($tags, false, true);
 657
 658         $tagList = array();
 659         foreach ($tags as $key => $value) {
 660             if (in_array($key, $filteringTags)) {
 661                 continue;
 662             }
 663             // Tag font size scaling:
 664             //   default 15 and 30 logarithm bases affect scaling,
 665             //   22 and 6 are arbitrary font sizes for max and min sizes.
 666             $size = log($value, 15) / log($maxcount, 30) * 2.2 + 0.8;
 667             $tagList[$key] = array(
 668                 'count' => $value,
 669                 'size' => number_format($size, 2, '.', ''),
 670             );
 671         }
 672
 673         $searchTags = implode(' ', escape($filteringTags));
 674         $data = array(
 675             'search_tags' => $searchTags,
 676             'tags' => $tagList,
 677         );
 678         $pluginManager->executeHooks('render_tagcloud', $data, array('loggedin' => $loginManager->isLoggedIn()));
 679
 680         foreach ($data as $key => $value) {
 681             $PAGE->assign($key, $value);
 682         }
 683
 684         $searchTags = ! empty($searchTags) ? $searchTags .' - ' : '';
 685         $PAGE->assign('pagetitle', $searchTags. t('Tag cloud') .' - '. $conf->get('general.title', 'Shaarli'));
 686         $PAGE->renderPage('tag.cloud');
 687         exit;
 688     }
 689
 690     // -------- Tag list
 691     if ($targetPage == Router::$PAGE_TAGLIST) {
 692         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
 693         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 694         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 695         foreach ($filteringTags as $tag) {
 696             if (array_key_exists($tag, $tags)) {
 697                 unset($tags[$tag]);
 698             }
 699         }
 700
 701         if (! empty($_GET['sort']) && $_GET['sort'] === 'alpha') {
 702             alphabetical_sort($tags, false, true);
 703         }
 704
 705         $searchTags = implode(' ', escape($filteringTags));
 706         $data = [
 707             'search_tags' => $searchTags,
 708             'tags' => $tags,
 709         ];
 710         $pluginManager->executeHooks('render_taglist', $data, ['loggedin' => $loginManager->isLoggedIn()]);
 711
 712         foreach ($data as $key => $value) {
 713             $PAGE->assign($key, $value);
 714         }
 715
 716         $searchTags = ! empty($searchTags) ? $searchTags .' - ' : '';
 717         $PAGE->assign('pagetitle', $searchTags . t('Tag list') .' - '. $conf->get('general.title', 'Shaarli'));
 718         $PAGE->renderPage('tag.list');
 719         exit;
 720     }
 721
 722     // Daily page.
 723     if ($targetPage == Router::$PAGE_DAILY) {
 724         showDaily($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
 725     }
 726
 727     // ATOM and RSS feed.
 728     if ($targetPage == Router::$PAGE_FEED_ATOM || $targetPage == Router::$PAGE_FEED_RSS) {
 729         $feedType = $targetPage == Router::$PAGE_FEED_RSS ? FeedBuilder::$FEED_RSS : FeedBuilder::$FEED_ATOM;
 730         header('Content-Type: application/'. $feedType .'+xml; charset=utf-8');
 731
 732         // Cache system
 733         $query = $_SERVER['QUERY_STRING'];
 734         $cache = new CachedPage(
 735             $conf->get('resource.page_cache'),
 736             page_url($_SERVER),
 737             startsWith($query, 'do='. $targetPage) && !$loginManager->isLoggedIn()
 738         );
 739         $cached = $cache->cachedVersion();
 740         if (!empty($cached)) {
 741             echo $cached;
 742             exit;
 743         }
 744
 745         // Generate data.
 746         $feedGenerator = new FeedBuilder($LINKSDB, $feedType, $_SERVER, $_GET, $loginManager->isLoggedIn());
 747         $feedGenerator->setLocale(strtolower(setlocale(LC_COLLATE, 0)));
 748         $feedGenerator->setHideDates($conf->get('privacy.hide_timestamps') && !$loginManager->isLoggedIn());
 749         $feedGenerator->setUsePermalinks(isset($_GET['permalinks']) || !$conf->get('feed.rss_permalinks'));
 750         $data = $feedGenerator->buildData();
 751
 752         // Process plugin hook.
 753         $pluginManager->executeHooks('render_feed', $data, array(
 754             'loggedin' => $loginManager->isLoggedIn(),
 755             'target' => $targetPage,
 756         ));
 757
 758         // Render the template.
 759         $PAGE->assignAll($data);
 760         $PAGE->renderPage('feed.'. $feedType);
 761         $cache->cache(ob_get_contents());
 762         ob_end_flush();
 763         exit;
 764     }
 765
 766     // Display opensearch plugin (XML)
 767     if ($targetPage == Router::$PAGE_OPENSEARCH) {
 768         header('Content-Type: application/xml; charset=utf-8');
 769         $PAGE->assign('serverurl', index_url($_SERVER));
 770         $PAGE->renderPage('opensearch');
 771         exit;
 772     }
 773
 774     // -------- User clicks on a tag in a link: The tag is added to the list of searched tags (searchtags=...)
 775     if (isset($_GET['addtag'])) {
 776         // Get previous URL (http_referer) and add the tag to the searchtags parameters in query.
 777         if (empty($_SERVER['HTTP_REFERER'])) {
 778             // In case browser does not send HTTP_REFERER
 779             header('Location: ?searchtags='.urlencode($_GET['addtag']));
 780             exit;
 781         }
 782         parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $params);
 783
 784         // Prevent redirection loop
 785         if (isset($params['addtag'])) {
 786             unset($params['addtag']);
 787         }
 788
 789         // Check if this tag is already in the search query and ignore it if it is.
 790         // Each tag is always separated by a space
 791         if (isset($params['searchtags'])) {
 792             $current_tags = explode(' ', $params['searchtags']);
 793         } else {
 794             $current_tags = array();
 795         }
 796         $addtag = true;
 797         foreach ($current_tags as $value) {
 798             if ($value === $_GET['addtag']) {
 799                 $addtag = false;
 800                 break;
 801             }
 802         }
 803         // Append the tag if necessary
 804         if (empty($params['searchtags'])) {
 805             $params['searchtags'] = trim($_GET['addtag']);
 806         } elseif ($addtag) {
 807             $params['searchtags'] = trim($params['searchtags']).' '.trim($_GET['addtag']);
 808         }
 809
 810         // We also remove page (keeping the same page has no sense, since the
 811         // results are different)
 812         unset($params['page']);
 813
 814         header('Location: ?'.http_build_query($params));
 815         exit;
 816     }
 817
 818     // -------- User clicks on a tag in result count: Remove the tag from the list of searched tags (searchtags=...)
 819     if (isset($_GET['removetag'])) {
 820         // Get previous URL (http_referer) and remove the tag from the searchtags parameters in query.
 821         if (empty($_SERVER['HTTP_REFERER'])) {
 822             header('Location: ?');
 823             exit;
 824         }
 825
 826         // In case browser does not send HTTP_REFERER
 827         parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $params);
 828
 829         // Prevent redirection loop
 830         if (isset($params['removetag'])) {
 831             unset($params['removetag']);
 832         }
 833
 834         if (isset($params['searchtags'])) {
 835             $tags = explode(' ', $params['searchtags']);
 836             // Remove value from array $tags.
 837             $tags = array_diff($tags, array($_GET['removetag']));
 838             $params['searchtags'] = implode(' ', $tags);
 839
 840             if (empty($params['searchtags'])) {
 841                 unset($params['searchtags']);
 842             }
 843
 844             // We also remove page (keeping the same page has no sense, since
 845             // the results are different)
 846             unset($params['page']);
 847         }
 848         header('Location: ?'.http_build_query($params));
 849         exit;
 850     }
 851
 852     // -------- User wants to change the number of links per page (linksperpage=...)
 853     if (isset($_GET['linksperpage'])) {
 854         if (is_numeric($_GET['linksperpage'])) {
 855             $_SESSION['LINKS_PER_PAGE']=abs(intval($_GET['linksperpage']));
 856         }
 857
 858         if (! empty($_SERVER['HTTP_REFERER'])) {
 859             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('linksperpage'));
 860         } else {
 861             $location = '?';
 862         }
 863         header('Location: '. $location);
 864         exit;
 865     }
 866
 867     // -------- User wants to see only private links (toggle)
 868     if (isset($_GET['visibility'])) {
 869         if ($_GET['visibility'] === 'private') {
 870             // Visibility not set or not already private, set private, otherwise reset it
 871             if (empty($_SESSION['visibility']) || $_SESSION['visibility'] !== 'private') {
 872                 // See only private links
 873                 $_SESSION['visibility'] = 'private';
 874             } else {
 875                 unset($_SESSION['visibility']);
 876             }
 877         } elseif ($_GET['visibility'] === 'public') {
 878             if (empty($_SESSION['visibility']) || $_SESSION['visibility'] !== 'public') {
 879                 // See only public links
 880                 $_SESSION['visibility'] = 'public';
 881             } else {
 882                 unset($_SESSION['visibility']);
 883             }
 884         }
 885
 886         if (! empty($_SERVER['HTTP_REFERER'])) {
 887             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('visibility'));
 888         } else {
 889             $location = '?';
 890         }
 891         header('Location: '. $location);
 892         exit;
 893     }
 894
 895     // -------- User wants to see only untagged links (toggle)
 896     if (isset($_GET['untaggedonly'])) {
 897         $_SESSION['untaggedonly'] = empty($_SESSION['untaggedonly']);
 898
 899         if (! empty($_SERVER['HTTP_REFERER'])) {
 900             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('untaggedonly'));
 901         } else {
 902             $location = '?';
 903         }
 904         header('Location: '. $location);
 905         exit;
 906     }
 907
 908     // -------- Handle other actions allowed for non-logged in users:
 909     if (!$loginManager->isLoggedIn()) {
 910         // User tries to post new link but is not logged in:
 911         // Show login screen, then redirect to ?post=...
 912         if (isset($_GET['post'])) {
 913             header( // Redirect to login page, then back to post link.
 914                 'Location: ?do=login&post='.urlencode($_GET['post']).
 915                 (!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').
 916                 (!empty($_GET['description'])?'&description='.urlencode($_GET['description']):'').
 917                 (!empty($_GET['tags'])?'&tags='.urlencode($_GET['tags']):'').
 918                 (!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')
 919             );
 920             exit;
 921         }
 922
 923         showLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
 924         if (isset($_GET['edit_link'])) {
 925             header('Location: ?do=login&edit_link='. escape($_GET['edit_link']));
 926             exit;
 927         }
 928
 929         exit; // Never remove this one! All operations below are reserved for logged in user.
 930     }
 931
 932     // -------- All other functions are reserved for the registered user:
 933
 934     // -------- Display the Tools menu if requested (import/export/bookmarklet...)
 935     if ($targetPage == Router::$PAGE_TOOLS) {
 936         $data = [
 937             'pageabsaddr' => index_url($_SERVER),
 938             'sslenabled' => is_https($_SERVER),
 939         ];
 940         $pluginManager->executeHooks('render_tools', $data);
 941
 942         foreach ($data as $key => $value) {
 943             $PAGE->assign($key, $value);
 944         }
 945
 946         $PAGE->assign('pagetitle', t('Tools') .' - '. $conf->get('general.title', 'Shaarli'));
 947         $PAGE->renderPage('tools');
 948         exit;
 949     }
 950
 951     // -------- User wants to change his/her password.
 952     if ($targetPage == Router::$PAGE_CHANGEPASSWORD) {
 953         if ($conf->get('security.open_shaarli')) {
 954             die(t('You are not supposed to change a password on an Open Shaarli.'));
 955         }
 956
 957         if (!empty($_POST['setpassword']) && !empty($_POST['oldpassword'])) {
 958             if (!$sessionManager->checkToken($_POST['token'])) {
 959                 die(t('Wrong token.')); // Go away!
 960             }
 961
 962             // Make sure old password is correct.
 963             $oldhash = sha1(
 964                 $_POST['oldpassword'].$conf->get('credentials.login').$conf->get('credentials.salt')
 965             );
 966             if ($oldhash != $conf->get('credentials.hash')) {
 967                 echo '<script>alert("'
 968                     . t('The old password is not correct.')
 969                     .'");document.location=\'?do=changepasswd\';</script>';
 970                 exit;
 971             }
 972             // Save new password
 973             // Salt renders rainbow-tables attacks useless.
 974             $conf->set('credentials.salt', sha1(uniqid('', true) .'_'. mt_rand()));
 975             $conf->set(
 976                 'credentials.hash',
 977                 sha1(
 978                     $_POST['setpassword']
 979                     . $conf->get('credentials.login')
 980                     . $conf->get('credentials.salt')
 981                 )
 982             );
 983             try {
 984                 $conf->write($loginManager->isLoggedIn());
 985             } catch (Exception $e) {
 986                 error_log(
 987                     'ERROR while writing config file after changing password.' . PHP_EOL .
 988                     $e->getMessage()
 989                 );
 990
 991                 // TODO: do not handle exceptions/errors in JS.
 992                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=tools\';</script>';
 993                 exit;
 994             }
 995             echo '<script>alert("'. t('Your password has been changed') .'");document.location=\'?do=tools\';</script>';
 996             exit;
 997         } else {
 998             // show the change password form.
 999             $PAGE->assign('pagetitle', t('Change password') .' - '. $conf->get('general.title', 'Shaarli'));
1000             $PAGE->renderPage('changepassword');
1001             exit;
1002         }
1003     }
1004
1005     // -------- User wants to change configuration
1006     if ($targetPage == Router::$PAGE_CONFIGURE) {
1007         if (!empty($_POST['title'])) {
1008             if (!$sessionManager->checkToken($_POST['token'])) {
1009                 die(t('Wrong token.')); // Go away!
1010             }
1011             $tz = 'UTC';
1012             if (!empty($_POST['continent']) && !empty($_POST['city'])
1013                 && isTimeZoneValid($_POST['continent'], $_POST['city'])
1014             ) {
1015                 $tz = $_POST['continent'] . '/' . $_POST['city'];
1016             }
1017             $conf->set('general.timezone', $tz);
1018             $conf->set('general.title', escape($_POST['title']));
1019             $conf->set('general.header_link', escape($_POST['titleLink']));
1020             $conf->set('resource.theme', escape($_POST['theme']));
1021             $conf->set('security.session_protection_disabled', !empty($_POST['disablesessionprotection']));
1022             $conf->set('privacy.default_private_links', !empty($_POST['privateLinkByDefault']));
1023             $conf->set('feed.rss_permalinks', !empty($_POST['enableRssPermalinks']));
1024             $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1025             $conf->set('privacy.hide_public_links', !empty($_POST['hidePublicLinks']));
1026             $conf->set('api.enabled', !empty($_POST['enableApi']));
1027             $conf->set('api.secret', escape($_POST['apiSecret']));
1028             $conf->set('translation.language', escape($_POST['language']));
1029
1030             $thumbnailsMode = extension_loaded('gd') ? $_POST['enableThumbnails'] : Thumbnailer::MODE_NONE;
1031             if ($thumbnailsMode !== Thumbnailer::MODE_NONE
1032                 && $thumbnailsMode !== $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE)
1033             ) {
1034                 $_SESSION['warnings'][] = t(
1035                     'You have enabled or changed thumbnails mode. '
1036                     .'<a href="?do=thumbs_update">Please synchronize them</a>.'
1037                 );
1038             }
1039             $conf->set('thumbnails.mode', $thumbnailsMode);
1040
1041             try {
1042                 $conf->write($loginManager->isLoggedIn());
1043                 $history->updateSettings();
1044                 invalidateCaches($conf->get('resource.page_cache'));
1045             } catch (Exception $e) {
1046                 error_log(
1047                     'ERROR while writing config file after configuration update.' . PHP_EOL .
1048                     $e->getMessage()
1049                 );
1050
1051                 // TODO: do not handle exceptions/errors in JS.
1052                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=configure\';</script>';
1053                 exit;
1054             }
1055             echo '<script>alert("'. t('Configuration was saved.') .'");document.location=\'?do=configure\';</script>';
1056             exit;
1057         } else {
1058             // Show the configuration form.
1059             $PAGE->assign('title', $conf->get('general.title'));
1060             $PAGE->assign('theme', $conf->get('resource.theme'));
1061             $PAGE->assign('theme_available', ThemeUtils::getThemes($conf->get('resource.raintpl_tpl')));
1062             list($continents, $cities) = generateTimeZoneData(
1063                 timezone_identifiers_list(),
1064                 $conf->get('general.timezone')
1065             );
1066             $PAGE->assign('continents', $continents);
1067             $PAGE->assign('cities', $cities);
1068             $PAGE->assign('private_links_default', $conf->get('privacy.default_private_links', false));
1069             $PAGE->assign('session_protection_disabled', $conf->get('security.session_protection_disabled', false));
1070             $PAGE->assign('enable_rss_permalinks', $conf->get('feed.rss_permalinks', false));
1071             $PAGE->assign('enable_update_check', $conf->get('updates.check_updates', true));
1072             $PAGE->assign('hide_public_links', $conf->get('privacy.hide_public_links', false));
1073             $PAGE->assign('api_enabled', $conf->get('api.enabled', true));
1074             $PAGE->assign('api_secret', $conf->get('api.secret'));
1075             $PAGE->assign('languages', Languages::getAvailableLanguages());
1076             $PAGE->assign('language', $conf->get('translation.language'));
1077             $PAGE->assign('gd_enabled', extension_loaded('gd'));
1078             $PAGE->assign('thumbnails_mode', $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE));
1079             $PAGE->assign('pagetitle', t('Configure') .' - '. $conf->get('general.title', 'Shaarli'));
1080             $PAGE->renderPage('configure');
1081             exit;
1082         }
1083     }
1084
1085     // -------- User wants to rename a tag or delete it
1086     if ($targetPage == Router::$PAGE_CHANGETAG) {
1087         if (empty($_POST['fromtag']) || (empty($_POST['totag']) && isset($_POST['renametag']))) {
1088             $PAGE->assign('fromtag', ! empty($_GET['fromtag']) ? escape($_GET['fromtag']) : '');
1089             $PAGE->assign('pagetitle', t('Manage tags') .' - '. $conf->get('general.title', 'Shaarli'));
1090             $PAGE->renderPage('changetag');
1091             exit;
1092         }
1093
1094         if (!$sessionManager->checkToken($_POST['token'])) {
1095             die(t('Wrong token.'));
1096         }
1097
1098         $toTag = isset($_POST['totag']) ? escape($_POST['totag']) : null;
1099         $alteredLinks = $LINKSDB->renameTag(escape($_POST['fromtag']), $toTag);
1100         $LINKSDB->save($conf->get('resource.page_cache'));
1101         foreach ($alteredLinks as $link) {
1102             $history->updateLink($link);
1103         }
1104         $delete = empty($_POST['totag']);
1105         $redirect = $delete ? 'do=changetag' : 'searchtags='. urlencode(escape($_POST['totag']));
1106         $count = count($alteredLinks);
1107         $alert = $delete
1108             ? sprintf(t('The tag was removed from %d link.', 'The tag was removed from %d links.', $count), $count)
1109             : sprintf(t('The tag was renamed in %d link.', 'The tag was renamed in %d links.', $count), $count);
1110         echo '<script>alert("'. $alert .'");document.location=\'?'. $redirect .'\';</script>';
1111         exit;
1112     }
1113
1114     // -------- User wants to add a link without using the bookmarklet: Show form.
1115     if ($targetPage == Router::$PAGE_ADDLINK) {
1116         $PAGE->assign('pagetitle', t('Shaare a new link') .' - '. $conf->get('general.title', 'Shaarli'));
1117         $PAGE->renderPage('addlink');
1118         exit;
1119     }
1120
1121     // -------- User clicked the "Save" button when editing a link: Save link to database.
1122     if (isset($_POST['save_edit'])) {
1123         // Go away!
1124         if (! $sessionManager->checkToken($_POST['token'])) {
1125             die(t('Wrong token.'));
1126         }
1127
1128         // lf_id should only be present if the link exists.
1129         $id = isset($_POST['lf_id']) ? intval(escape($_POST['lf_id'])) : $LINKSDB->getNextId();
1130         // Linkdate is kept here to:
1131         //   - use the same permalink for notes as they're displayed when creating them
1132         //   - let users hack creation date of their posts
1133         //     See: https://shaarli.readthedocs.io/en/master/guides/various-hacks/#changing-the-timestamp-for-a-shaare
1134         $linkdate = escape($_POST['lf_linkdate']);
1135         if (isset($LINKSDB[$id])) {
1136             // Edit
1137             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1138             $updated = new DateTime();
1139             $shortUrl = $LINKSDB[$id]['shorturl'];
1140             $new = false;
1141         } else {
1142             // New link
1143             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1144             $updated = null;
1145             $shortUrl = link_small_hash($created, $id);
1146             $new = true;
1147         }
1148
1149         // Remove multiple spaces.
1150         $tags = trim(preg_replace('/\s\s+/', ' ', $_POST['lf_tags']));
1151         // Remove first '-' char in tags.
1152         $tags = preg_replace('/(^| )\-/', '$1', $tags);
1153         // Remove duplicates.
1154         $tags = implode(' ', array_unique(explode(' ', $tags)));
1155
1156         if (empty(trim($_POST['lf_url']))) {
1157             $_POST['lf_url'] = '?' . smallHash($linkdate . $id);
1158         }
1159         $url = whitelist_protocols(trim($_POST['lf_url']), $conf->get('security.allowed_protocols'));
1160
1161         $link = array(
1162             'id' => $id,
1163             'title' => trim($_POST['lf_title']),
1164             'url' => $url,
1165             'description' => $_POST['lf_description'],
1166             'private' => (isset($_POST['lf_private']) ? 1 : 0),
1167             'created' => $created,
1168             'updated' => $updated,
1169             'tags' => str_replace(',', ' ', $tags),
1170             'shorturl' => $shortUrl,
1171         );
1172
1173         // If title is empty, use the URL as title.
1174         if ($link['title'] == '') {
1175             $link['title'] = $link['url'];
1176         }
1177
1178         if ($conf->get('thumbnails.mode', Thumbnailer::MODE_NONE) !== Thumbnailer::MODE_NONE) {
1179             $thumbnailer = new Thumbnailer($conf);
1180             $link['thumbnail'] = $thumbnailer->get($url);
1181         }
1182
1183         $pluginManager->executeHooks('save_link', $link);
1184
1185         $LINKSDB[$id] = $link;
1186         $LINKSDB->save($conf->get('resource.page_cache'));
1187         if ($new) {
1188             $history->addLink($link);
1189         } else {
1190             $history->updateLink($link);
1191         }
1192
1193         // If we are called from the bookmarklet, we must close the popup:
1194         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1195             echo '<script>self.close();</script>';
1196             exit;
1197         }
1198
1199         $returnurl = !empty($_POST['returnurl']) ? $_POST['returnurl'] : '?';
1200         $location = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1201         // Scroll to the link which has been edited.
1202         $location .= '#' . $link['shorturl'];
1203         // After saving the link, redirect to the page the user was on.
1204         header('Location: '. $location);
1205         exit;
1206     }
1207
1208     // -------- User clicked the "Cancel" button when editing a link.
1209     if (isset($_POST['cancel_edit'])) {
1210         $id = isset($_POST['lf_id']) ? (int) escape($_POST['lf_id']) : false;
1211         if (! isset($LINKSDB[$id])) {
1212             header('Location: ?');
1213         }
1214         // If we are called from the bookmarklet, we must close the popup:
1215         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1216             echo '<script>self.close();</script>';
1217             exit;
1218         }
1219         $link = $LINKSDB[$id];
1220         $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
1221         // Scroll to the link which has been edited.
1222         $returnurl .= '#'. $link['shorturl'];
1223         $returnurl = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1224         header('Location: '.$returnurl); // After canceling, redirect to the page the user was on.
1225         exit;
1226     }
1227
1228     // -------- User clicked the "Delete" button when editing a link: Delete link from database.
1229     if ($targetPage == Router::$PAGE_DELETELINK) {
1230         if (! $sessionManager->checkToken($_GET['token'])) {
1231             die(t('Wrong token.'));
1232         }
1233
1234         $ids = trim($_GET['lf_linkdate']);
1235         if (strpos($ids, ' ') !== false) {
1236             // multiple, space-separated ids provided
1237             $ids = array_values(array_filter(preg_split('/\s+/', escape($ids))));
1238         } else {
1239             // only a single id provided
1240             $ids = [$ids];
1241         }
1242         // assert at least one id is given
1243         if (!count($ids)) {
1244             die('no id provided');
1245         }
1246         foreach ($ids as $id) {
1247             $id = (int) escape($id);
1248             $link = $LINKSDB[$id];
1249             $pluginManager->executeHooks('delete_link', $link);
1250             $history->deleteLink($link);
1251             unset($LINKSDB[$id]);
1252         }
1253         $LINKSDB->save($conf->get('resource.page_cache')); // save to disk
1254
1255         // If we are called from the bookmarklet, we must close the popup:
1256         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1257             echo '<script>self.close();</script>';
1258             exit;
1259         }
1260
1261         $location = '?';
1262         if (isset($_SERVER['HTTP_REFERER'])) {
1263             // Don't redirect to where we were previously if it was a permalink or an edit_link, because it would 404.
1264             $location = generateLocation(
1265                 $_SERVER['HTTP_REFERER'],
1266                 $_SERVER['HTTP_HOST'],
1267                 ['delete_link', 'edit_link', $link['shorturl']]
1268             );
1269         }
1270
1271         header('Location: ' . $location); // After deleting the link, redirect to appropriate location
1272         exit;
1273     }
1274
1275     // -------- User clicked the "EDIT" button on a link: Display link edit form.
1276     if (isset($_GET['edit_link'])) {
1277         $id = (int) escape($_GET['edit_link']);
1278         $link = $LINKSDB[$id];  // Read database
1279         if (!$link) {
1280             header('Location: ?');
1281             exit;
1282         } // Link not found in database.
1283         $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1284         $data = array(
1285             'link' => $link,
1286             'link_is_new' => false,
1287             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1288             'tags' => $LINKSDB->linksCountPerTag(),
1289         );
1290         $pluginManager->executeHooks('render_editlink', $data);
1291
1292         foreach ($data as $key => $value) {
1293             $PAGE->assign($key, $value);
1294         }
1295
1296         $PAGE->assign('pagetitle', t('Edit') .' '. t('Shaare') .' - '. $conf->get('general.title', 'Shaarli'));
1297         $PAGE->renderPage('editlink');
1298         exit;
1299     }
1300
1301     // -------- User want to post a new link: Display link edit form.
1302     if (isset($_GET['post'])) {
1303         $url = cleanup_url($_GET['post']);
1304
1305         $link_is_new = false;
1306         // Check if URL is not already in database (in this case, we will edit the existing link)
1307         $link = $LINKSDB->getLinkFromUrl($url);
1308         if (! $link) {
1309             $link_is_new = true;
1310             $linkdate = strval(date(LinkDB::LINK_DATE_FORMAT));
1311             // Get title if it was provided in URL (by the bookmarklet).
1312             $title = empty($_GET['title']) ? '' : escape($_GET['title']);
1313             // Get description if it was provided in URL (by the bookmarklet). [Bronco added that]
1314             $description = empty($_GET['description']) ? '' : escape($_GET['description']);
1315             $tags = empty($_GET['tags']) ? '' : escape($_GET['tags']);
1316             $private = !empty($_GET['private']) && $_GET['private'] === "1" ? 1 : 0;
1317
1318             // If this is an HTTP(S) link, we try go get the page to extract
1319             // the title (otherwise we will to straight to the edit form.)
1320             if (empty($title) && strpos(get_url_scheme($url), 'http') !== false) {
1321                 // Short timeout to keep the application responsive
1322                 // The callback will fill $charset and $title with data from the downloaded page.
1323                 get_http_response(
1324                     $url,
1325                     $conf->get('general.download_timeout', 30),
1326                     $conf->get('general.download_max_size', 4194304),
1327                     get_curl_download_callback($charset, $title)
1328                 );
1329                 if (! empty($title) && strtolower($charset) != 'utf-8') {
1330                     $title = mb_convert_encoding($title, 'utf-8', $charset);
1331                 }
1332             }
1333
1334             if ($url == '') {
1335                 $url = '?' . smallHash($linkdate . $LINKSDB->getNextId());
1336                 $title = $conf->get('general.default_note_title', t('Note: '));
1337             }
1338             $url = escape($url);
1339             $title = escape($title);
1340
1341             $link = array(
1342                 'linkdate' => $linkdate,
1343                 'title' => $title,
1344                 'url' => $url,
1345                 'description' => $description,
1346                 'tags' => $tags,
1347                 'private' => $private,
1348             );
1349         } else {
1350             $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1351         }
1352
1353         $data = array(
1354             'link' => $link,
1355             'link_is_new' => $link_is_new,
1356             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1357             'source' => (isset($_GET['source']) ? $_GET['source'] : ''),
1358             'tags' => $LINKSDB->linksCountPerTag(),
1359             'default_private_links' => $conf->get('privacy.default_private_links', false),
1360         );
1361         $pluginManager->executeHooks('render_editlink', $data);
1362
1363         foreach ($data as $key => $value) {
1364             $PAGE->assign($key, $value);
1365         }
1366
1367         $PAGE->assign('pagetitle', t('Shaare') .' - '. $conf->get('general.title', 'Shaarli'));
1368         $PAGE->renderPage('editlink');
1369         exit;
1370     }
1371
1372     if ($targetPage == Router::$PAGE_PINLINK) {
1373         if (! isset($_GET['id']) || empty($LINKSDB[$_GET['id']])) {
1374             // FIXME! Use a proper error system.
1375             $msg = t('Invalid link ID provided');
1376             echo '<script>alert("'. $msg .'");document.location=\''. index_url($_SERVER) .'\';</script>';
1377             exit;
1378         }
1379         if (! $sessionManager->checkToken($_GET['token'])) {
1380             die('Wrong token.');
1381         }
1382
1383         $link = $LINKSDB[$_GET['id']];
1384         $link['sticky'] = ! $link['sticky'];
1385         $LINKSDB[(int) $_GET['id']] = $link;
1386         $LINKSDB->save($conf->get('resource.page_cache'));
1387         header('Location: '.index_url($_SERVER));
1388         exit;
1389     }
1390
1391     if ($targetPage == Router::$PAGE_EXPORT) {
1392         // Export links as a Netscape Bookmarks file
1393
1394         if (empty($_GET['selection'])) {
1395             $PAGE->assign('pagetitle', t('Export') .' - '. $conf->get('general.title', 'Shaarli'));
1396             $PAGE->renderPage('export');
1397             exit;
1398         }
1399
1400         // export as bookmarks_(all|private|public)_YYYYmmdd_HHMMSS.html
1401         $selection = $_GET['selection'];
1402         if (isset($_GET['prepend_note_url'])) {
1403             $prependNoteUrl = $_GET['prepend_note_url'];
1404         } else {
1405             $prependNoteUrl = false;
1406         }
1407
1408         try {
1409             $PAGE->assign(
1410                 'links',
1411                 NetscapeBookmarkUtils::filterAndFormat(
1412                     $LINKSDB,
1413                     $selection,
1414                     $prependNoteUrl,
1415                     index_url($_SERVER)
1416                 )
1417             );
1418         } catch (Exception $exc) {
1419             header('Content-Type: text/plain; charset=utf-8');
1420             echo $exc->getMessage();
1421             exit;
1422         }
1423         $now = new DateTime();
1424         header('Content-Type: text/html; charset=utf-8');
1425         header(
1426             'Content-disposition: attachment; filename=bookmarks_'
1427             .$selection.'_'.$now->format(LinkDB::LINK_DATE_FORMAT).'.html'
1428         );
1429         $PAGE->assign('date', $now->format(DateTime::RFC822));
1430         $PAGE->assign('eol', PHP_EOL);
1431         $PAGE->assign('selection', $selection);
1432         $PAGE->renderPage('export.bookmarks');
1433         exit;
1434     }
1435
1436     if ($targetPage == Router::$PAGE_IMPORT) {
1437         // Upload a Netscape bookmark dump to import its contents
1438
1439         if (! isset($_POST['token']) || ! isset($_FILES['filetoupload'])) {
1440             // Show import dialog
1441             $PAGE->assign(
1442                 'maxfilesize',
1443                 get_max_upload_size(
1444                     ini_get('post_max_size'),
1445                     ini_get('upload_max_filesize'),
1446                     false
1447                 )
1448             );
1449             $PAGE->assign(
1450                 'maxfilesizeHuman',
1451                 get_max_upload_size(
1452                     ini_get('post_max_size'),
1453                     ini_get('upload_max_filesize'),
1454                     true
1455                 )
1456             );
1457             $PAGE->assign('pagetitle', t('Import') .' - '. $conf->get('general.title', 'Shaarli'));
1458             $PAGE->renderPage('import');
1459             exit;
1460         }
1461
1462         // Import bookmarks from an uploaded file
1463         if (isset($_FILES['filetoupload']['size']) && $_FILES['filetoupload']['size'] == 0) {
1464             // The file is too big or some form field may be missing.
1465             $msg = sprintf(
1466                 t(
1467                     'The file you are trying to upload is probably bigger than what this webserver can accept'
1468                     .' (%s). Please upload in smaller chunks.'
1469                 ),
1470                 get_max_upload_size(ini_get('post_max_size'), ini_get('upload_max_filesize'))
1471             );
1472             echo '<script>alert("'. $msg .'");document.location=\'?do='.Router::$PAGE_IMPORT .'\';</script>';
1473             exit;
1474         }
1475         if (! $sessionManager->checkToken($_POST['token'])) {
1476             die('Wrong token.');
1477         }
1478         $status = NetscapeBookmarkUtils::import(
1479             $_POST,
1480             $_FILES,
1481             $LINKSDB,
1482             $conf,
1483             $history
1484         );
1485         echo '<script>alert("'.$status.'");document.location=\'?do='
1486              .Router::$PAGE_IMPORT .'\';</script>';
1487         exit;
1488     }
1489
1490     // Plugin administration page
1491     if ($targetPage == Router::$PAGE_PLUGINSADMIN) {
1492         $pluginMeta = $pluginManager->getPluginsMeta();
1493
1494         // Split plugins into 2 arrays: ordered enabled plugins and disabled.
1495         $enabledPlugins = array_filter($pluginMeta, function ($v) {
1496             return $v['order'] !== false;
1497         });
1498         // Load parameters.
1499         $enabledPlugins = load_plugin_parameter_values($enabledPlugins, $conf->get('plugins', array()));
1500         uasort(
1501             $enabledPlugins,
1502             function ($a, $b) {
1503                 return $a['order'] - $b['order'];
1504             }
1505         );
1506         $disabledPlugins = array_filter($pluginMeta, function ($v) {
1507             return $v['order'] === false;
1508         });
1509
1510         $PAGE->assign('enabledPlugins', $enabledPlugins);
1511         $PAGE->assign('disabledPlugins', $disabledPlugins);
1512         $PAGE->assign('pagetitle', t('Plugin administration') .' - '. $conf->get('general.title', 'Shaarli'));
1513         $PAGE->renderPage('pluginsadmin');
1514         exit;
1515     }
1516
1517     // Plugin administration form action
1518     if ($targetPage == Router::$PAGE_SAVE_PLUGINSADMIN) {
1519         try {
1520             if (isset($_POST['parameters_form'])) {
1521                 unset($_POST['parameters_form']);
1522                 foreach ($_POST as $param => $value) {
1523                     $conf->set('plugins.'. $param, escape($value));
1524                 }
1525             } else {
1526                 $conf->set('general.enabled_plugins', save_plugin_config($_POST));
1527             }
1528             $conf->write($loginManager->isLoggedIn());
1529             $history->updateSettings();
1530         } catch (Exception $e) {
1531             error_log(
1532                 'ERROR while saving plugin configuration:.' . PHP_EOL .
1533                 $e->getMessage()
1534             );
1535
1536             // TODO: do not handle exceptions/errors in JS.
1537             echo '<script>alert("'
1538                 . $e->getMessage()
1539                 .'");document.location=\'?do='
1540                 . Router::$PAGE_PLUGINSADMIN
1541                 .'\';</script>';
1542             exit;
1543         }
1544         header('Location: ?do='. Router::$PAGE_PLUGINSADMIN);
1545         exit;
1546     }
1547
1548     // Get a fresh token
1549     if ($targetPage == Router::$GET_TOKEN) {
1550         header('Content-Type:text/plain');
1551         echo $sessionManager->generateToken($conf);
1552         exit;
1553     }
1554
1555     // -------- Thumbnails Update
1556     if ($targetPage == Router::$PAGE_THUMBS_UPDATE) {
1557         $ids = [];
1558         foreach ($LINKSDB as $link) {
1559             // A note or not HTTP(S)
1560             if ($link['url'][0] === '?' || ! startsWith(strtolower($link['url']), 'http')) {
1561                 continue;
1562             }
1563             $ids[] = $link['id'];
1564         }
1565         $PAGE->assign('ids', $ids);
1566         $PAGE->assign('pagetitle', t('Thumbnails update') .' - '. $conf->get('general.title', 'Shaarli'));
1567         $PAGE->renderPage('thumbnails');
1568         exit;
1569     }
1570
1571     // -------- Single Thumbnail Update
1572     if ($targetPage == Router::$AJAX_THUMB_UPDATE) {
1573         if (! isset($_POST['id']) || ! ctype_digit($_POST['id'])) {
1574             http_response_code(400);
1575             exit;
1576         }
1577         $id = (int) $_POST['id'];
1578         if (empty($LINKSDB[$id])) {
1579             http_response_code(404);
1580             exit;
1581         }
1582         $thumbnailer = new Thumbnailer($conf);
1583         $link = $LINKSDB[$id];
1584         $link['thumbnail'] = $thumbnailer->get($link['url']);
1585         $LINKSDB[$id] = $link;
1586         $LINKSDB->save($conf->get('resource.page_cache'));
1587
1588         echo json_encode($link);
1589         exit;
1590     }
1591
1592     // -------- Otherwise, simply display search form and links:
1593     showLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
1594     exit;
1595 }
1596
1597 /**
1598  * Template for the list of links (<div id="linklist">)
1599  * This function fills all the necessary fields in the $PAGE for the template 'linklist.html'
1600  *
1601  * @param pageBuilder   $PAGE          pageBuilder instance.
1602  * @param LinkDB        $LINKSDB       LinkDB instance.
1603  * @param ConfigManager $conf          Configuration Manager instance.
1604  * @param PluginManager $pluginManager Plugin Manager instance.
1605  * @param LoginManager  $loginManager  LoginManager instance
1606  */
1607 function buildLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager)
1608 {
1609     // Used in templates
1610     if (isset($_GET['searchtags'])) {
1611         if (! empty($_GET['searchtags'])) {
1612             $searchtags = escape(normalize_spaces($_GET['searchtags']));
1613         } else {
1614             $searchtags = false;
1615         }
1616     } else {
1617         $searchtags = '';
1618     }
1619     $searchterm = !empty($_GET['searchterm']) ? escape(normalize_spaces($_GET['searchterm'])) : '';
1620
1621     // Smallhash filter
1622     if (! empty($_SERVER['QUERY_STRING'])
1623         && preg_match('/^[a-zA-Z0-9-_@]{6}($|&|#)/', $_SERVER['QUERY_STRING'])) {
1624         try {
1625             $linksToDisplay = $LINKSDB->filterHash($_SERVER['QUERY_STRING']);
1626         } catch (LinkNotFoundException $e) {
1627             $PAGE->render404($e->getMessage());
1628             exit;
1629         }
1630     } else {
1631         // Filter links according search parameters.
1632         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
1633         $request = [
1634             'searchtags' => $searchtags,
1635             'searchterm' => $searchterm,
1636         ];
1637         $linksToDisplay = $LINKSDB->filterSearch($request, false, $visibility, !empty($_SESSION['untaggedonly']));
1638     }
1639
1640     // ---- Handle paging.
1641     $keys = array();
1642     foreach ($linksToDisplay as $key => $value) {
1643         $keys[] = $key;
1644     }
1645
1646     // Select articles according to paging.
1647     $pagecount = ceil(count($keys) / $_SESSION['LINKS_PER_PAGE']);
1648     $pagecount = $pagecount == 0 ? 1 : $pagecount;
1649     $page= empty($_GET['page']) ? 1 : intval($_GET['page']);
1650     $page = $page < 1 ? 1 : $page;
1651     $page = $page > $pagecount ? $pagecount : $page;
1652     // Start index.
1653     $i = ($page-1) * $_SESSION['LINKS_PER_PAGE'];
1654     $end = $i + $_SESSION['LINKS_PER_PAGE'];
1655
1656     $thumbnailsEnabled = $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE) !== Thumbnailer::MODE_NONE;
1657     if ($thumbnailsEnabled) {
1658         $thumbnailer = new Thumbnailer($conf);
1659     }
1660
1661     $linkDisp = array();
1662     while ($i<$end && $i<count($keys)) {
1663         $link = $linksToDisplay[$keys[$i]];
1664         $link['description'] = format_description(
1665             $link['description'],
1666             $conf->get('redirector.url'),
1667             $conf->get('redirector.encode_url')
1668         );
1669         $classLi =  ($i % 2) != 0 ? '' : 'publicLinkHightLight';
1670         $link['class'] = $link['private'] == 0 ? $classLi : 'private';
1671         $link['timestamp'] = $link['created']->getTimestamp();
1672         if (! empty($link['updated'])) {
1673             $link['updated_timestamp'] = $link['updated']->getTimestamp();
1674         } else {
1675             $link['updated_timestamp'] = '';
1676         }
1677         $taglist = preg_split('/\s+/', $link['tags'], -1, PREG_SPLIT_NO_EMPTY);
1678         uasort($taglist, 'strcasecmp');
1679         $link['taglist'] = $taglist;
1680
1681         // Logged in, thumbnails enabled, not a note,
1682         // and (never retrieved yet or no valid cache file)
1683         if ($loginManager->isLoggedIn() && $thumbnailsEnabled && $link['url'][0] != '?'
1684             && (! isset($link['thumbnail']) || ($link['thumbnail'] !== false && ! is_file($link['thumbnail'])))
1685         ) {
1686             $elem = $LINKSDB[$keys[$i]];
1687             $elem['thumbnail'] = $thumbnailer->get($link['url']);
1688             $LINKSDB[$keys[$i]] = $elem;
1689             $updateDB = true;
1690             $link['thumbnail'] = $elem['thumbnail'];
1691         }
1692
1693         // Check for both signs of a note: starting with ? and 7 chars long.
1694         if ($link['url'][0] === '?' && strlen($link['url']) === 7) {
1695             $link['url'] = index_url($_SERVER) . $link['url'];
1696         }
1697
1698         $linkDisp[$keys[$i]] = $link;
1699         $i++;
1700     }
1701
1702     // If we retrieved new thumbnails, we update the database.
1703     if (!empty($updateDB)) {
1704         $LINKSDB->save($conf->get('resource.page_cache'));
1705     }
1706
1707     // Compute paging navigation
1708     $searchtagsUrl = $searchtags === '' ? '' : '&searchtags=' . urlencode($searchtags);
1709     $searchtermUrl = empty($searchterm) ? '' : '&searchterm=' . urlencode($searchterm);
1710     $previous_page_url = '';
1711     if ($i != count($keys)) {
1712         $previous_page_url = '?page=' . ($page+1) . $searchtermUrl . $searchtagsUrl;
1713     }
1714     $next_page_url='';
1715     if ($page>1) {
1716         $next_page_url = '?page=' . ($page-1) . $searchtermUrl . $searchtagsUrl;
1717     }
1718
1719     // Fill all template fields.
1720     $data = array(
1721         'previous_page_url' => $previous_page_url,
1722         'next_page_url' => $next_page_url,
1723         'page_current' => $page,
1724         'page_max' => $pagecount,
1725         'result_count' => count($linksToDisplay),
1726         'search_term' => $searchterm,
1727         'search_tags' => $searchtags,
1728         'visibility' => ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '',
1729         'redirector' => $conf->get('redirector.url'),  // Optional redirector URL.
1730         'links' => $linkDisp,
1731     );
1732
1733     // If there is only a single link, we change on-the-fly the title of the page.
1734     if (count($linksToDisplay) == 1) {
1735         $data['pagetitle'] = $linksToDisplay[$keys[0]]['title'] .' - '. $conf->get('general.title');
1736     } elseif (! empty($searchterm) || ! empty($searchtags)) {
1737         $data['pagetitle'] = t('Search: ');
1738         $data['pagetitle'] .= ! empty($searchterm) ? $searchterm .' ' : '';
1739         $bracketWrap = function ($tag) {
1740             return '['. $tag .']';
1741         };
1742         $data['pagetitle'] .= ! empty($searchtags)
1743             ? implode(' ', array_map($bracketWrap, preg_split('/\s+/', $searchtags))).' '
1744             : '';
1745         $data['pagetitle'] .= '- '. $conf->get('general.title');
1746     }
1747
1748     $pluginManager->executeHooks('render_linklist', $data, array('loggedin' => $loginManager->isLoggedIn()));
1749
1750     foreach ($data as $key => $value) {
1751         $PAGE->assign($key, $value);
1752     }
1753
1754     return;
1755 }
1756
1757 /**
1758  * Installation
1759  * This function should NEVER be called if the file data/config.php exists.
1760  *
1761  * @param ConfigManager  $conf           Configuration Manager instance.
1762  * @param SessionManager $sessionManager SessionManager instance
1763  * @param LoginManager   $loginManager   LoginManager instance
1764  */
1765 function install($conf, $sessionManager, $loginManager)
1766 {
1767     // On free.fr host, make sure the /sessions directory exists, otherwise login will not work.
1768     if (endsWith($_SERVER['HTTP_HOST'], '.free.fr') && !is_dir($_SERVER['DOCUMENT_ROOT'].'/sessions')) {
1769         mkdir($_SERVER['DOCUMENT_ROOT'].'/sessions', 0705);
1770     }
1771
1772
1773     // This part makes sure sessions works correctly.
1774     // (Because on some hosts, session.save_path may not be set correctly,
1775     // or we may not have write access to it.)
1776     if (isset($_GET['test_session'])
1777         && ( !isset($_SESSION) || !isset($_SESSION['session_tested']) || $_SESSION['session_tested']!='Working')) {
1778         // Step 2: Check if data in session is correct.
1779         $msg = t(
1780             '<pre>Sessions do not seem to work correctly on your server.<br>'.
1781             'Make sure the variable "session.save_path" is set correctly in your PHP config, '.
1782             'and that you have write access to it.<br>'.
1783             'It currently points to %s.<br>'.
1784             'On some browsers, accessing your server via a hostname like \'localhost\' '.
1785             'or any custom hostname without a dot causes cookie storage to fail. '.
1786             'We recommend accessing your server via it\'s IP address or Fully Qualified Domain Name.<br>'
1787         );
1788         $msg = sprintf($msg, session_save_path());
1789         echo $msg;
1790         echo '<br><a href="?">'. t('Click to try again.') .'</a></pre>';
1791         die;
1792     }
1793     if (!isset($_SESSION['session_tested'])) {
1794         // Step 1 : Try to store data in session and reload page.
1795         $_SESSION['session_tested'] = 'Working';  // Try to set a variable in session.
1796         header('Location: '.index_url($_SERVER).'?test_session');  // Redirect to check stored data.
1797     }
1798     if (isset($_GET['test_session'])) {
1799         // Step 3: Sessions are OK. Remove test parameter from URL.
1800         header('Location: '.index_url($_SERVER));
1801     }
1802
1803
1804     if (!empty($_POST['setlogin']) && !empty($_POST['setpassword'])) {
1805         $tz = 'UTC';
1806         if (!empty($_POST['continent']) && !empty($_POST['city'])
1807             && isTimeZoneValid($_POST['continent'], $_POST['city'])
1808         ) {
1809             $tz = $_POST['continent'].'/'.$_POST['city'];
1810         }
1811         $conf->set('general.timezone', $tz);
1812         $login = $_POST['setlogin'];
1813         $conf->set('credentials.login', $login);
1814         $salt = sha1(uniqid('', true) .'_'. mt_rand());
1815         $conf->set('credentials.salt', $salt);
1816         $conf->set('credentials.hash', sha1($_POST['setpassword'] . $login . $salt));
1817         if (!empty($_POST['title'])) {
1818             $conf->set('general.title', escape($_POST['title']));
1819         } else {
1820             $conf->set('general.title', 'Shared links on '.escape(index_url($_SERVER)));
1821         }
1822         $conf->set('translation.language', escape($_POST['language']));
1823         $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1824         $conf->set('api.enabled', !empty($_POST['enableApi']));
1825         $conf->set(
1826             'api.secret',
1827             generate_api_secret(
1828                 $conf->get('credentials.login'),
1829                 $conf->get('credentials.salt')
1830             )
1831         );
1832         try {
1833             // Everything is ok, let's create config file.
1834             $conf->write($loginManager->isLoggedIn());
1835         } catch (Exception $e) {
1836             error_log(
1837                 'ERROR while writing config file after installation.' . PHP_EOL .
1838                     $e->getMessage()
1839             );
1840
1841             // TODO: do not handle exceptions/errors in JS.
1842             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?\';</script>';
1843             exit;
1844         }
1845         echo '<script>alert('
1846             .'"Shaarli is now configured. '
1847             .'Please enter your login/password and start shaaring your links!"'
1848             .');document.location=\'?do=login\';</script>';
1849         exit;
1850     }
1851
1852     $PAGE = new PageBuilder($conf, $_SESSION, null, $sessionManager->generateToken());
1853     list($continents, $cities) = generateTimeZoneData(timezone_identifiers_list(), date_default_timezone_get());
1854     $PAGE->assign('continents', $continents);
1855     $PAGE->assign('cities', $cities);
1856     $PAGE->assign('languages', Languages::getAvailableLanguages());
1857     $PAGE->renderPage('install');
1858     exit;
1859 }
1860
1861 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=dailyrss')) {
1862     showDailyRSS($conf, $loginManager);
1863     exit;
1864 }
1865
1866 if (!isset($_SESSION['LINKS_PER_PAGE'])) {
1867     $_SESSION['LINKS_PER_PAGE'] = $conf->get('general.links_per_page', 20);
1868 }
1869
1870 try {
1871     $history = new History($conf->get('resource.history'));
1872 } catch (Exception $e) {
1873     die($e->getMessage());
1874 }
1875
1876 $linkDb = new LinkDB(
1877     $conf->get('resource.datastore'),
1878     $loginManager->isLoggedIn(),
1879     $conf->get('privacy.hide_public_links'),
1880     $conf->get('redirector.url'),
1881     $conf->get('redirector.encode_url')
1882 );
1883
1884 $container = new \Slim\Container();
1885 $container['conf'] = $conf;
1886 $container['plugins'] = $pluginManager;
1887 $container['history'] = $history;
1888 $app = new \Slim\App($container);
1889
1890 // REST API routes
1891 $app->group('/api/v1', function () {
1892     $this->get('/info', '\Shaarli\Api\Controllers\Info:getInfo')->setName('getInfo');
1893     $this->get('/links', '\Shaarli\Api\Controllers\Links:getLinks')->setName('getLinks');
1894     $this->get('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:getLink')->setName('getLink');
1895     $this->post('/links', '\Shaarli\Api\Controllers\Links:postLink')->setName('postLink');
1896     $this->put('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:putLink')->setName('putLink');
1897     $this->delete('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:deleteLink')->setName('deleteLink');
1898
1899     $this->get('/tags', '\Shaarli\Api\Controllers\Tags:getTags')->setName('getTags');
1900     $this->get('/tags/{tagName:[\w]+}', '\Shaarli\Api\Controllers\Tags:getTag')->setName('getTag');
1901     $this->put('/tags/{tagName:[\w]+}', '\Shaarli\Api\Controllers\Tags:putTag')->setName('putTag');
1902     $this->delete('/tags/{tagName:[\w]+}', '\Shaarli\Api\Controllers\Tags:deleteTag')->setName('deleteTag');
1903
1904     $this->get('/history', '\Shaarli\Api\Controllers\History:getHistory')->setName('getHistory');
1905 })->add('\Shaarli\Api\ApiMiddleware');
1906
1907 $response = $app->run(true);
1908
1909 // Hack to make Slim and Shaarli router work together:
1910 // If a Slim route isn't found and NOT API call, we call renderPage().
1911 if ($response->getStatusCode() == 404 && strpos($_SERVER['REQUEST_URI'], '/api/v1') === false) {
1912     // We use UTF-8 for proper international characters handling.
1913     header('Content-Type: text/html; charset=utf-8');
1914     renderPage($conf, $pluginManager, $linkDb, $history, $sessionManager, $loginManager);
1915 } else {
1916     $response = $response
1917         ->withHeader('Access-Control-Allow-Origin', '*')
1918         ->withHeader(
1919             'Access-Control-Allow-Headers',
1920             'X-Requested-With, Content-Type, Accept, Origin, Authorization'
1921         )
1922         ->withHeader('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE, OPTIONS');
1923     $app->respond($response);
1924 }