index.php

   1 <?php
   2 /**
   3 <<<<<<< HEAD
   4  * Shaarli v0.8.7 - Shaare your links...
   5  *
   6  * The personal, minimalist, super-fast, database free, bookmarking service.
   7 =======
   8  * Shaarli - The personal, minimalist, super-fast, database free, bookmarking service.
   9 >>>>>>> v0.9.7
  10  *
  11  * Friendly fork by the Shaarli community:
  12  *  - https://github.com/shaarli/Shaarli
  13  *
  14  * Original project by sebsauvage.net:
  15  *  - http://sebsauvage.net/wiki/doku.php?id=php:shaarli
  16  *  - https://github.com/sebsauvage/Shaarli
  17  *
  18  * Licence: http://www.opensource.org/licenses/zlib-license.php
  19  *
  20  * Requires: PHP 5.5.x
  21  */
  22
  23 // Set 'UTC' as the default timezone if it is not defined in php.ini
  24 // See http://php.net/manual/en/datetime.configuration.php#ini.date.timezone
  25 if (date_default_timezone_get() == '') {
  26     date_default_timezone_set('UTC');
  27 }
  28
  29 /*
  30  * PHP configuration
  31  */
  32
  33 // http://server.com/x/shaarli --> /shaarli/
  34 define('WEB_PATH', substr($_SERVER['REQUEST_URI'], 0, 1+strrpos($_SERVER['REQUEST_URI'], '/', 0)));
  35
  36 // High execution time in case of problematic imports/exports.
  37 ini_set('max_input_time', '60');
  38
  39 // Try to set max upload file size and read
  40 ini_set('memory_limit', '128M');
  41 ini_set('post_max_size', '16M');
  42 ini_set('upload_max_filesize', '16M');
  43
  44 // See all error except warnings
  45 error_reporting(E_ALL^E_WARNING);
  46 // See all errors (for debugging only)
  47 //error_reporting(-1);
  48
  49
  50 // 3rd-party libraries
  51 if (! file_exists(__DIR__ . '/vendor/autoload.php')) {
  52     header('Content-Type: text/plain; charset=utf-8');
  53     echo "Error: missing Composer configuration\n\n"
  54         ."If you installed Shaarli through Git or using the development branch,\n"
  55         ."please refer to the installation documentation to install PHP"
  56         ." dependencies using Composer:\n"
  57         ."- https://shaarli.readthedocs.io/en/master/Server-configuration/\n"
  58         ."- https://shaarli.readthedocs.io/en/master/Download-and-Installation/";
  59     exit;
  60 }
  61 require_once 'inc/rain.tpl.class.php';
  62 require_once __DIR__ . '/vendor/autoload.php';
  63
  64 // Shaarli library
  65 require_once 'application/bookmark/LinkUtils.php';
  66 require_once 'application/config/ConfigPlugin.php';
  67 require_once 'application/feed/Cache.php';
  68 require_once 'application/http/HttpUtils.php';
  69 require_once 'application/http/UrlUtils.php';
  70 require_once 'application/updater/UpdaterUtils.php';
  71 require_once 'application/FileUtils.php';
  72 require_once 'application/TimeZone.php';
  73 require_once 'application/Utils.php';
  74
  75 use \Shaarli\ApplicationUtils;
  76 use \Shaarli\Bookmark\Exception\LinkNotFoundException;
  77 use \Shaarli\Bookmark\LinkDB;
  78 use \Shaarli\Config\ConfigManager;
  79 use \Shaarli\Feed\CachedPage;
  80 use \Shaarli\Feed\FeedBuilder;
  81 use \Shaarli\History;
  82 use \Shaarli\Languages;
  83 use \Shaarli\Netscape\NetscapeBookmarkUtils;
  84 use \Shaarli\Plugin\PluginManager;
  85 use \Shaarli\Render\PageBuilder;
  86 use \Shaarli\Render\ThemeUtils;
  87 use \Shaarli\Router;
  88 use \Shaarli\Security\LoginManager;
  89 use \Shaarli\Security\SessionManager;
  90 use \Shaarli\Thumbnailer;
  91 use \Shaarli\Updater\Updater;
  92
  93 // Ensure the PHP version is supported
  94 try {
  95     ApplicationUtils::checkPHPVersion('5.5', PHP_VERSION);
  96 } catch (Exception $exc) {
  97     header('Content-Type: text/plain; charset=utf-8');
  98     echo $exc->getMessage();
  99     exit;
 100 }
 101
 102 define('SHAARLI_VERSION', ApplicationUtils::getVersion(__DIR__ .'/'. ApplicationUtils::$VERSION_FILE));
 103
 104 // Force cookie path (but do not change lifetime)
 105 $cookie = session_get_cookie_params();
 106 $cookiedir = '';
 107 if (dirname($_SERVER['SCRIPT_NAME']) != '/') {
 108     $cookiedir = dirname($_SERVER["SCRIPT_NAME"]).'/';
 109 }
 110 // Set default cookie expiration and path.
 111 session_set_cookie_params($cookie['lifetime'], $cookiedir, $_SERVER['SERVER_NAME']);
 112 // Set session parameters on server side.
 113 // Use cookies to store session.
 114 ini_set('session.use_cookies', 1);
 115 // Force cookies for session (phpsessionID forbidden in URL).
 116 ini_set('session.use_only_cookies', 1);
 117 // Prevent PHP form using sessionID in URL if cookies are disabled.
 118 ini_set('session.use_trans_sid', false);
 119
 120 session_name('shaarli');
 121 // Start session if needed (Some server auto-start sessions).
 122 if (session_status() == PHP_SESSION_NONE) {
 123     session_start();
 124 }
 125
 126 // Regenerate session ID if invalid or not defined in cookie.
 127 if (isset($_COOKIE['shaarli']) && !SessionManager::checkId($_COOKIE['shaarli'])) {
 128     session_regenerate_id(true);
 129     $_COOKIE['shaarli'] = session_id();
 130 }
 131
 132 $conf = new ConfigManager();
 133 $sessionManager = new SessionManager($_SESSION, $conf);
 134 $loginManager = new LoginManager($conf, $sessionManager);
 135 $loginManager->generateStaySignedInToken($_SERVER['REMOTE_ADDR']);
 136 $clientIpId = client_ip_id($_SERVER);
 137
 138 // LC_MESSAGES isn't defined without php-intl, in this case use LC_COLLATE locale instead.
 139 if (! defined('LC_MESSAGES')) {
 140     define('LC_MESSAGES', LC_COLLATE);
 141 }
 142
 143 // Sniff browser language and set date format accordingly.
 144 if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
 145     autoLocale($_SERVER['HTTP_ACCEPT_LANGUAGE']);
 146 }
 147
 148 new Languages(setlocale(LC_MESSAGES, 0), $conf);
 149
 150 $conf->setEmpty('general.timezone', date_default_timezone_get());
 151 $conf->setEmpty('general.title', t('Shared links on '). escape(index_url($_SERVER)));
 152 RainTPL::$tpl_dir = $conf->get('resource.raintpl_tpl').'/'.$conf->get('resource.theme').'/'; // template directory
 153 RainTPL::$cache_dir = $conf->get('resource.raintpl_tmp'); // cache directory
 154
 155 $pluginManager = new PluginManager($conf);
 156 $pluginManager->load($conf->get('general.enabled_plugins'));
 157
 158 date_default_timezone_set($conf->get('general.timezone', 'UTC'));
 159
 160 ob_start();  // Output buffering for the page cache.
 161
 162 // Prevent caching on client side or proxy: (yes, it's ugly)
 163 header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
 164 header("Cache-Control: no-store, no-cache, must-revalidate");
 165 header("Cache-Control: post-check=0, pre-check=0", false);
 166 header("Pragma: no-cache");
 167
 168 if (! is_file($conf->getConfigFileExt())) {
 169     // Ensure Shaarli has proper access to its resources
 170     $errors = ApplicationUtils::checkResourcePermissions($conf);
 171
 172     if ($errors != array()) {
 173         $message = '<p>'. t('Insufficient permissions:') .'</p><ul>';
 174
 175         foreach ($errors as $error) {
 176             $message .= '<li>'.$error.'</li>';
 177         }
 178         $message .= '</ul>';
 179
 180         header('Content-Type: text/html; charset=utf-8');
 181         echo $message;
 182         exit;
 183     }
 184
 185     // Display the installation form if no existing config is found
 186     install($conf, $sessionManager, $loginManager);
 187 }
 188
 189 $loginManager->checkLoginState($_COOKIE, $clientIpId);
 190
 191 /**
 192  * Adapter function to ensure compatibility with third-party templates
 193  *
 194  * @see https://github.com/shaarli/Shaarli/pull/1086
 195  *
 196  * @return bool true when the user is logged in, false otherwise
 197  */
 198 function isLoggedIn()
 199 {
 200     global $loginManager;
 201     return $loginManager->isLoggedIn();
 202 }
 203
 204
 205 // ------------------------------------------------------------------------------------------
 206 // Process login form: Check if login/password is correct.
 207 if (isset($_POST['login'])) {
 208     if (! $loginManager->canLogin($_SERVER)) {
 209         die(t('I said: NO. You are banned for the moment. Go away.'));
 210     }
 211     if (isset($_POST['password'])
 212         && $sessionManager->checkToken($_POST['token'])
 213         && $loginManager->checkCredentials($_SERVER['REMOTE_ADDR'], $clientIpId, $_POST['login'], $_POST['password'])
 214     ) {
 215         $loginManager->handleSuccessfulLogin($_SERVER);
 216
 217         $cookiedir = '';
 218         if (dirname($_SERVER['SCRIPT_NAME']) != '/') {
 219             // Note: Never forget the trailing slash on the cookie path!
 220             $cookiedir = dirname($_SERVER["SCRIPT_NAME"]) . '/';
 221         }
 222
 223         if (!empty($_POST['longlastingsession'])) {
 224             // Keep the session cookie even after the browser closes
 225             $sessionManager->setStaySignedIn(true);
 226             $expirationTime = $sessionManager->extendSession();
 227
 228             setcookie(
 229                 $loginManager::$STAY_SIGNED_IN_COOKIE,
 230                 $loginManager->getStaySignedInToken(),
 231                 $expirationTime,
 232                 WEB_PATH
 233             );
 234         } else {
 235             // Standard session expiration (=when browser closes)
 236             $expirationTime = 0;
 237         }
 238
 239         // Send cookie with the new expiration date to the browser
 240         session_set_cookie_params($expirationTime, $cookiedir, $_SERVER['SERVER_NAME']);
 241         session_regenerate_id(true);
 242
 243         // Optional redirect after login:
 244         if (isset($_GET['post'])) {
 245             $uri = '?post='. urlencode($_GET['post']);
 246             foreach (array('description', 'source', 'title', 'tags') as $param) {
 247                 if (!empty($_GET[$param])) {
 248                     $uri .= '&'.$param.'='.urlencode($_GET[$param]);
 249                 }
 250             }
 251             header('Location: '. $uri);
 252             exit;
 253         }
 254
 255         if (isset($_GET['edit_link'])) {
 256             header('Location: ?edit_link='. escape($_GET['edit_link']));
 257             exit;
 258         }
 259
 260         if (isset($_POST['returnurl'])) {
 261             // Prevent loops over login screen.
 262             if (strpos($_POST['returnurl'], 'do=login') === false) {
 263                 header('Location: '. generateLocation($_POST['returnurl'], $_SERVER['HTTP_HOST']));
 264                 exit;
 265             }
 266         }
 267         header('Location: ?');
 268         exit;
 269     } else {
 270         $loginManager->handleFailedLogin($_SERVER);
 271         $redir = '&username='. urlencode($_POST['login']);
 272         if (isset($_GET['post'])) {
 273             $redir .= '&post=' . urlencode($_GET['post']);
 274             foreach (array('description', 'source', 'title', 'tags') as $param) {
 275                 if (!empty($_GET[$param])) {
 276                     $redir .= '&' . $param . '=' . urlencode($_GET[$param]);
 277                 }
 278             }
 279         }
 280         // Redirect to login screen.
 281         echo '<script>alert("'. t("Wrong login/password.") .'");document.location=\'?do=login'.$redir.'\';</script>';
 282         exit;
 283     }
 284 }
 285
 286 // ------------------------------------------------------------------------------------------
 287 // Token management for XSRF protection
 288 // Token should be used in any form which acts on data (create,update,delete,import...).
 289 if (!isset($_SESSION['tokens'])) {
 290     $_SESSION['tokens']=array();  // Token are attached to the session.
 291 }
 292
 293 /**
 294  * Daily RSS feed: 1 RSS entry per day giving all the links on that day.
 295  * Gives the last 7 days (which have links).
 296  * This RSS feed cannot be filtered.
 297  *
 298  * @param ConfigManager $conf         Configuration Manager instance
 299  * @param LoginManager  $loginManager LoginManager instance
 300  */
 301 function showDailyRSS($conf, $loginManager)
 302 {
 303     // Cache system
 304     $query = $_SERVER['QUERY_STRING'];
 305     $cache = new CachedPage(
 306         $conf->get('config.PAGE_CACHE'),
 307         page_url($_SERVER),
 308         startsWith($query, 'do=dailyrss') && !$loginManager->isLoggedIn()
 309     );
 310     $cached = $cache->cachedVersion();
 311     if (!empty($cached)) {
 312         echo $cached;
 313         exit;
 314     }
 315
 316     // If cached was not found (or not usable), then read the database and build the response:
 317     // Read links from database (and filter private links if used it not logged in).
 318     $LINKSDB = new LinkDB(
 319         $conf->get('resource.datastore'),
 320         $loginManager->isLoggedIn(),
 321         $conf->get('privacy.hide_public_links')
 322     );
 323
 324     /* Some Shaarlies may have very few links, so we need to look
 325        back in time until we have enough days ($nb_of_days).
 326     */
 327     $nb_of_days = 7; // We take 7 days.
 328     $today = date('Ymd');
 329     $days = array();
 330
 331     foreach ($LINKSDB as $link) {
 332         $day = $link['created']->format('Ymd'); // Extract day (without time)
 333         if (strcmp($day, $today) < 0) {
 334             if (empty($days[$day])) {
 335                 $days[$day] = array();
 336             }
 337             $days[$day][] = $link;
 338         }
 339
 340         if (count($days) > $nb_of_days) {
 341             break; // Have we collected enough days?
 342         }
 343     }
 344
 345     // Build the RSS feed.
 346     header('Content-Type: application/rss+xml; charset=utf-8');
 347     $pageaddr = escape(index_url($_SERVER));
 348     echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0">';
 349     echo '<channel>';
 350     echo '<title>Daily - '. $conf->get('general.title') . '</title>';
 351     echo '<link>'. $pageaddr .'</link>';
 352     echo '<description>Daily shared links</description>';
 353     echo '<language>en-en</language>';
 354     echo '<copyright>'. $pageaddr .'</copyright>'. PHP_EOL;
 355
 356     // For each day.
 357     foreach ($days as $day => $links) {
 358         $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 359         $absurl = escape(index_url($_SERVER).'?do=daily&day='.$day);  // Absolute URL of the corresponding "Daily" page.
 360
 361         // We pre-format some fields for proper output.
 362         foreach ($links as &$link) {
 363             $link['formatedDescription'] = format_description($link['description']);
 364             $link['timestamp'] = $link['created']->getTimestamp();
 365             if (is_note($link['url'])) {
 366                 $link['url'] = index_url($_SERVER) . $link['url'];  // make permalink URL absolute
 367             }
 368         }
 369
 370         // Then build the HTML for this day:
 371         $tpl = new RainTPL;
 372         $tpl->assign('title', $conf->get('general.title'));
 373         $tpl->assign('daydate', $dayDate->getTimestamp());
 374         $tpl->assign('absurl', $absurl);
 375         $tpl->assign('links', $links);
 376         $tpl->assign('rssdate', escape($dayDate->format(DateTime::RSS)));
 377         $tpl->assign('hide_timestamps', $conf->get('privacy.hide_timestamps', false));
 378         $tpl->assign('index_url', $pageaddr);
 379         $html = $tpl->draw('dailyrss', true);
 380
 381         echo $html . PHP_EOL;
 382     }
 383     echo '</channel></rss><!-- Cached version of '. escape(page_url($_SERVER)) .' -->';
 384
 385     $cache->cache(ob_get_contents());
 386     ob_end_flush();
 387     exit;
 388 }
 389
 390 /**
 391  * Show the 'Daily' page.
 392  *
 393  * @param PageBuilder   $pageBuilder   Template engine wrapper.
 394  * @param LinkDB        $LINKSDB       LinkDB instance.
 395  * @param ConfigManager $conf          Configuration Manager instance.
 396  * @param PluginManager $pluginManager Plugin Manager instance.
 397  * @param LoginManager  $loginManager  Login Manager instance
 398  */
 399 function showDaily($pageBuilder, $LINKSDB, $conf, $pluginManager, $loginManager)
 400 {
 401     if (isset($_GET['day'])) {
 402         $day = $_GET['day'];
 403         if ($day === date('Ymd', strtotime('now'))) {
 404             $pageBuilder->assign('dayDesc', t('Today'));
 405         } elseif ($day === date('Ymd', strtotime('-1 days'))) {
 406             $pageBuilder->assign('dayDesc', t('Yesterday'));
 407         }
 408     } else {
 409         $day = date('Ymd', strtotime('now')); // Today, in format YYYYMMDD.
 410         $pageBuilder->assign('dayDesc', t('Today'));
 411     }
 412
 413     $days = $LINKSDB->days();
 414     $i = array_search($day, $days);
 415     if ($i === false && count($days)) {
 416         // no links for day, but at least one day with links
 417         $i = count($days) - 1;
 418         $day = $days[$i];
 419     }
 420     $previousday = '';
 421     $nextday = '';
 422
 423     if ($i !== false) {
 424         if ($i >= 1) {
 425              $previousday=$days[$i - 1];
 426         }
 427         if ($i < count($days) - 1) {
 428             $nextday = $days[$i + 1];
 429         }
 430     }
 431     try {
 432         $linksToDisplay = $LINKSDB->filterDay($day);
 433     } catch (Exception $exc) {
 434         error_log($exc);
 435         $linksToDisplay = array();
 436     }
 437
 438     // We pre-format some fields for proper output.
 439     foreach ($linksToDisplay as $key => $link) {
 440         $taglist = explode(' ', $link['tags']);
 441         uasort($taglist, 'strcasecmp');
 442         $linksToDisplay[$key]['taglist']=$taglist;
 443         $linksToDisplay[$key]['formatedDescription'] = format_description($link['description']);
 444         $linksToDisplay[$key]['timestamp'] =  $link['created']->getTimestamp();
 445     }
 446
 447     $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 448     $data = array(
 449         'pagetitle' => $conf->get('general.title') .' - '. format_date($dayDate, false),
 450         'linksToDisplay' => $linksToDisplay,
 451         'day' => $dayDate->getTimestamp(),
 452         'dayDate' => $dayDate,
 453         'previousday' => $previousday,
 454         'nextday' => $nextday,
 455     );
 456
 457     /* Hook is called before column construction so that plugins don't have
 458        to deal with columns. */
 459     $pluginManager->executeHooks('render_daily', $data, array('loggedin' => $loginManager->isLoggedIn()));
 460
 461     /* We need to spread the articles on 3 columns.
 462        I did not want to use a JavaScript lib like http://masonry.desandro.com/
 463        so I manually spread entries with a simple method: I roughly evaluate the
 464        height of a div according to title and description length.
 465     */
 466     $columns = array(array(), array(), array()); // Entries to display, for each column.
 467     $fill = array(0, 0, 0);  // Rough estimate of columns fill.
 468     foreach ($data['linksToDisplay'] as $key => $link) {
 469         // Roughly estimate length of entry (by counting characters)
 470         // Title: 30 chars = 1 line. 1 line is 30 pixels height.
 471         // Description: 836 characters gives roughly 342 pixel height.
 472         // This is not perfect, but it's usually OK.
 473         $length = strlen($link['title']) + (342 * strlen($link['description'])) / 836;
 474         if ($link['thumbnail']) {
 475             $length += 100; // 1 thumbnails roughly takes 100 pixels height.
 476         }
 477         // Then put in column which is the less filled:
 478         $smallest = min($fill); // find smallest value in array.
 479         $index = array_search($smallest, $fill); // find index of this smallest value.
 480         array_push($columns[$index], $link); // Put entry in this column.
 481         $fill[$index] += $length;
 482     }
 483
 484     $data['cols'] = $columns;
 485
 486     foreach ($data as $key => $value) {
 487         $pageBuilder->assign($key, $value);
 488     }
 489
 490     $pageBuilder->assign('pagetitle', t('Daily') .' - '. $conf->get('general.title', 'Shaarli'));
 491     $pageBuilder->renderPage('daily');
 492     exit;
 493 }
 494
 495 /**
 496  * Renders the linklist
 497  *
 498  * @param pageBuilder   $PAGE    pageBuilder instance.
 499  * @param LinkDB        $LINKSDB LinkDB instance.
 500  * @param ConfigManager $conf    Configuration Manager instance.
 501  * @param PluginManager $pluginManager Plugin Manager instance.
 502  */
 503 function showLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager)
 504 {
 505     buildLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
 506     $PAGE->renderPage('linklist');
 507 }
 508
 509 /**
 510  * Render HTML page (according to URL parameters and user rights)
 511  *
 512  * @param ConfigManager  $conf           Configuration Manager instance.
 513  * @param PluginManager  $pluginManager  Plugin Manager instance,
 514  * @param LinkDB         $LINKSDB
 515  * @param History        $history        instance
 516  * @param SessionManager $sessionManager SessionManager instance
 517  * @param LoginManager   $loginManager   LoginManager instance
 518  */
 519 function renderPage($conf, $pluginManager, $LINKSDB, $history, $sessionManager, $loginManager)
 520 {
 521     $updater = new Updater(
 522         read_updates_file($conf->get('resource.updates')),
 523         $LINKSDB,
 524         $conf,
 525         $loginManager->isLoggedIn(),
 526         $_SESSION
 527     );
 528     try {
 529         $newUpdates = $updater->update();
 530         if (! empty($newUpdates)) {
 531             write_updates_file(
 532                 $conf->get('resource.updates'),
 533                 $updater->getDoneUpdates()
 534             );
 535         }
 536     } catch (Exception $e) {
 537         die($e->getMessage());
 538     }
 539
 540     $PAGE = new PageBuilder($conf, $_SESSION, $LINKSDB, $sessionManager->generateToken(), $loginManager->isLoggedIn());
 541     $PAGE->assign('linkcount', count($LINKSDB));
 542     $PAGE->assign('privateLinkcount', count_private($LINKSDB));
 543     $PAGE->assign('plugin_errors', $pluginManager->getErrors());
 544
 545     // Determine which page will be rendered.
 546     $query = (isset($_SERVER['QUERY_STRING'])) ? $_SERVER['QUERY_STRING'] : '';
 547     $targetPage = Router::findPage($query, $_GET, $loginManager->isLoggedIn());
 548
 549     if (// if the user isn't logged in
 550         !$loginManager->isLoggedIn() &&
 551         // and Shaarli doesn't have public content...
 552         $conf->get('privacy.hide_public_links') &&
 553         // and is configured to enforce the login
 554         $conf->get('privacy.force_login') &&
 555         // and the current page isn't already the login page
 556         $targetPage !== Router::$PAGE_LOGIN &&
 557         // and the user is not requesting a feed (which would lead to a different content-type as expected)
 558         $targetPage !== Router::$PAGE_FEED_ATOM &&
 559         $targetPage !== Router::$PAGE_FEED_RSS
 560     ) {
 561         // force current page to be the login page
 562         $targetPage = Router::$PAGE_LOGIN;
 563     }
 564
 565     // Call plugin hooks for header, footer and includes, specifying which page will be rendered.
 566     // Then assign generated data to RainTPL.
 567     $common_hooks = array(
 568         'includes',
 569         'header',
 570         'footer',
 571     );
 572
 573     foreach ($common_hooks as $name) {
 574         $plugin_data = array();
 575         $pluginManager->executeHooks(
 576             'render_' . $name,
 577             $plugin_data,
 578             array(
 579                 'target' => $targetPage,
 580                 'loggedin' => $loginManager->isLoggedIn()
 581             )
 582         );
 583         $PAGE->assign('plugins_' . $name, $plugin_data);
 584     }
 585
 586     // -------- Display login form.
 587     if ($targetPage == Router::$PAGE_LOGIN) {
 588         if ($conf->get('security.open_shaarli')) {
 589             header('Location: ?');
 590             exit;
 591         }  // No need to login for open Shaarli
 592         if (isset($_GET['username'])) {
 593             $PAGE->assign('username', escape($_GET['username']));
 594         }
 595         $PAGE->assign('returnurl', (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']):''));
 596         // add default state of the 'remember me' checkbox
 597         $PAGE->assign('remember_user_default', $conf->get('privacy.remember_user_default'));
 598         $PAGE->assign('user_can_login', $loginManager->canLogin($_SERVER));
 599         $PAGE->assign('pagetitle', t('Login') .' - '. $conf->get('general.title', 'Shaarli'));
 600         $PAGE->renderPage('loginform');
 601         exit;
 602     }
 603     // -------- User wants to logout.
 604     if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=logout')) {
 605         invalidateCaches($conf->get('resource.page_cache'));
 606         $sessionManager->logout();
 607         setcookie(LoginManager::$STAY_SIGNED_IN_COOKIE, 'false', 0, WEB_PATH);
 608         header('Location: ?');
 609         exit;
 610     }
 611
 612     // -------- Picture wall
 613     if ($targetPage == Router::$PAGE_PICWALL) {
 614         $PAGE->assign('pagetitle', t('Picture wall') .' - '. $conf->get('general.title', 'Shaarli'));
 615         if (! $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE) === Thumbnailer::MODE_NONE) {
 616             $PAGE->assign('linksToDisplay', []);
 617             $PAGE->renderPage('picwall');
 618             exit;
 619         }
 620
 621         // Optionally filter the results:
 622         $links = $LINKSDB->filterSearch($_GET);
 623         $linksToDisplay = array();
 624
 625         // Get only links which have a thumbnail.
 626         // Note: we do not retrieve thumbnails here, the request is too heavy.
 627         foreach ($links as $key => $link) {
 628             if (isset($link['thumbnail']) && $link['thumbnail'] !== false) {
 629                 $linksToDisplay[] = $link; // Add to array.
 630             }
 631         }
 632
 633         $data = array(
 634             'linksToDisplay' => $linksToDisplay,
 635         );
 636         $pluginManager->executeHooks('render_picwall', $data, array('loggedin' => $loginManager->isLoggedIn()));
 637
 638         foreach ($data as $key => $value) {
 639             $PAGE->assign($key, $value);
 640         }
 641
 642
 643         $PAGE->renderPage('picwall');
 644         exit;
 645     }
 646
 647     // -------- Tag cloud
 648     if ($targetPage == Router::$PAGE_TAGCLOUD) {
 649         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
 650         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 651         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 652
 653         // We sort tags alphabetically, then choose a font size according to count.
 654         // First, find max value.
 655         $maxcount = 0;
 656         foreach ($tags as $value) {
 657             $maxcount = max($maxcount, $value);
 658         }
 659
 660         alphabetical_sort($tags, false, true);
 661
 662         $tagList = array();
 663         foreach ($tags as $key => $value) {
 664             if (in_array($key, $filteringTags)) {
 665                 continue;
 666             }
 667             // Tag font size scaling:
 668             //   default 15 and 30 logarithm bases affect scaling,
 669             //   22 and 6 are arbitrary font sizes for max and min sizes.
 670             $size = log($value, 15) / log($maxcount, 30) * 2.2 + 0.8;
 671             $tagList[$key] = array(
 672                 'count' => $value,
 673                 'size' => number_format($size, 2, '.', ''),
 674             );
 675         }
 676
 677         $searchTags = implode(' ', escape($filteringTags));
 678         $data = array(
 679             'search_tags' => $searchTags,
 680             'tags' => $tagList,
 681         );
 682         $pluginManager->executeHooks('render_tagcloud', $data, array('loggedin' => $loginManager->isLoggedIn()));
 683
 684         foreach ($data as $key => $value) {
 685             $PAGE->assign($key, $value);
 686         }
 687
 688         $searchTags = ! empty($searchTags) ? $searchTags .' - ' : '';
 689         $PAGE->assign('pagetitle', $searchTags. t('Tag cloud') .' - '. $conf->get('general.title', 'Shaarli'));
 690         $PAGE->renderPage('tag.cloud');
 691         exit;
 692     }
 693
 694     // -------- Tag list
 695     if ($targetPage == Router::$PAGE_TAGLIST) {
 696         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
 697         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 698         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 699         foreach ($filteringTags as $tag) {
 700             if (array_key_exists($tag, $tags)) {
 701                 unset($tags[$tag]);
 702             }
 703         }
 704
 705         if (! empty($_GET['sort']) && $_GET['sort'] === 'alpha') {
 706             alphabetical_sort($tags, false, true);
 707         }
 708
 709         $searchTags = implode(' ', escape($filteringTags));
 710         $data = [
 711             'search_tags' => $searchTags,
 712             'tags' => $tags,
 713         ];
 714         $pluginManager->executeHooks('render_taglist', $data, ['loggedin' => $loginManager->isLoggedIn()]);
 715
 716         foreach ($data as $key => $value) {
 717             $PAGE->assign($key, $value);
 718         }
 719
 720         $searchTags = ! empty($searchTags) ? $searchTags .' - ' : '';
 721         $PAGE->assign('pagetitle', $searchTags . t('Tag list') .' - '. $conf->get('general.title', 'Shaarli'));
 722         $PAGE->renderPage('tag.list');
 723         exit;
 724     }
 725
 726     // Daily page.
 727     if ($targetPage == Router::$PAGE_DAILY) {
 728         showDaily($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
 729     }
 730
 731     // ATOM and RSS feed.
 732     if ($targetPage == Router::$PAGE_FEED_ATOM || $targetPage == Router::$PAGE_FEED_RSS) {
 733         $feedType = $targetPage == Router::$PAGE_FEED_RSS ? FeedBuilder::$FEED_RSS : FeedBuilder::$FEED_ATOM;
 734         header('Content-Type: application/'. $feedType .'+xml; charset=utf-8');
 735
 736         // Cache system
 737         $query = $_SERVER['QUERY_STRING'];
 738         $cache = new CachedPage(
 739             $conf->get('resource.page_cache'),
 740             page_url($_SERVER),
 741             startsWith($query, 'do='. $targetPage) && !$loginManager->isLoggedIn()
 742         );
 743         $cached = $cache->cachedVersion();
 744         if (!empty($cached)) {
 745             echo $cached;
 746             exit;
 747         }
 748
 749         // Generate data.
 750         $feedGenerator = new FeedBuilder($LINKSDB, $feedType, $_SERVER, $_GET, $loginManager->isLoggedIn());
 751         $feedGenerator->setLocale(strtolower(setlocale(LC_COLLATE, 0)));
 752         $feedGenerator->setHideDates($conf->get('privacy.hide_timestamps') && !$loginManager->isLoggedIn());
 753         $feedGenerator->setUsePermalinks(isset($_GET['permalinks']) || !$conf->get('feed.rss_permalinks'));
 754         $data = $feedGenerator->buildData();
 755
 756         // Process plugin hook.
 757         $pluginManager->executeHooks('render_feed', $data, array(
 758             'loggedin' => $loginManager->isLoggedIn(),
 759             'target' => $targetPage,
 760         ));
 761
 762         // Render the template.
 763         $PAGE->assignAll($data);
 764         $PAGE->renderPage('feed.'. $feedType);
 765         $cache->cache(ob_get_contents());
 766         ob_end_flush();
 767         exit;
 768     }
 769
 770     // Display opensearch plugin (XML)
 771     if ($targetPage == Router::$PAGE_OPENSEARCH) {
 772         header('Content-Type: application/xml; charset=utf-8');
 773         $PAGE->assign('serverurl', index_url($_SERVER));
 774         $PAGE->renderPage('opensearch');
 775         exit;
 776     }
 777
 778     // -------- User clicks on a tag in a link: The tag is added to the list of searched tags (searchtags=...)
 779     if (isset($_GET['addtag'])) {
 780         // Get previous URL (http_referer) and add the tag to the searchtags parameters in query.
 781         if (empty($_SERVER['HTTP_REFERER'])) {
 782             // In case browser does not send HTTP_REFERER
 783             header('Location: ?searchtags='.urlencode($_GET['addtag']));
 784             exit;
 785         }
 786         parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $params);
 787
 788         // Prevent redirection loop
 789         if (isset($params['addtag'])) {
 790             unset($params['addtag']);
 791         }
 792
 793         // Check if this tag is already in the search query and ignore it if it is.
 794         // Each tag is always separated by a space
 795         if (isset($params['searchtags'])) {
 796             $current_tags = explode(' ', $params['searchtags']);
 797         } else {
 798             $current_tags = array();
 799         }
 800         $addtag = true;
 801         foreach ($current_tags as $value) {
 802             if ($value === $_GET['addtag']) {
 803                 $addtag = false;
 804                 break;
 805             }
 806         }
 807         // Append the tag if necessary
 808         if (empty($params['searchtags'])) {
 809             $params['searchtags'] = trim($_GET['addtag']);
 810         } elseif ($addtag) {
 811             $params['searchtags'] = trim($params['searchtags']).' '.trim($_GET['addtag']);
 812         }
 813
 814         // We also remove page (keeping the same page has no sense, since the
 815         // results are different)
 816         unset($params['page']);
 817
 818         header('Location: ?'.http_build_query($params));
 819         exit;
 820     }
 821
 822     // -------- User clicks on a tag in result count: Remove the tag from the list of searched tags (searchtags=...)
 823     if (isset($_GET['removetag'])) {
 824         // Get previous URL (http_referer) and remove the tag from the searchtags parameters in query.
 825         if (empty($_SERVER['HTTP_REFERER'])) {
 826             header('Location: ?');
 827             exit;
 828         }
 829
 830         // In case browser does not send HTTP_REFERER
 831         parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $params);
 832
 833         // Prevent redirection loop
 834         if (isset($params['removetag'])) {
 835             unset($params['removetag']);
 836         }
 837
 838         if (isset($params['searchtags'])) {
 839             $tags = explode(' ', $params['searchtags']);
 840             // Remove value from array $tags.
 841             $tags = array_diff($tags, array($_GET['removetag']));
 842             $params['searchtags'] = implode(' ', $tags);
 843
 844             if (empty($params['searchtags'])) {
 845                 unset($params['searchtags']);
 846             }
 847
 848             // We also remove page (keeping the same page has no sense, since
 849             // the results are different)
 850             unset($params['page']);
 851         }
 852         header('Location: ?'.http_build_query($params));
 853         exit;
 854     }
 855
 856     // -------- User wants to change the number of links per page (linksperpage=...)
 857     if (isset($_GET['linksperpage'])) {
 858         if (is_numeric($_GET['linksperpage'])) {
 859             $_SESSION['LINKS_PER_PAGE']=abs(intval($_GET['linksperpage']));
 860         }
 861
 862         if (! empty($_SERVER['HTTP_REFERER'])) {
 863             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('linksperpage'));
 864         } else {
 865             $location = '?';
 866         }
 867         header('Location: '. $location);
 868         exit;
 869     }
 870
 871     // -------- User wants to see only private links (toggle)
 872     if (isset($_GET['visibility'])) {
 873         if ($_GET['visibility'] === 'private') {
 874             // Visibility not set or not already private, set private, otherwise reset it
 875             if (empty($_SESSION['visibility']) || $_SESSION['visibility'] !== 'private') {
 876                 // See only private links
 877                 $_SESSION['visibility'] = 'private';
 878             } else {
 879                 unset($_SESSION['visibility']);
 880             }
 881         } elseif ($_GET['visibility'] === 'public') {
 882             if (empty($_SESSION['visibility']) || $_SESSION['visibility'] !== 'public') {
 883                 // See only public links
 884                 $_SESSION['visibility'] = 'public';
 885             } else {
 886                 unset($_SESSION['visibility']);
 887             }
 888         }
 889
 890         if (! empty($_SERVER['HTTP_REFERER'])) {
 891             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('visibility'));
 892         } else {
 893             $location = '?';
 894         }
 895         header('Location: '. $location);
 896         exit;
 897     }
 898
 899     // -------- User wants to see only untagged links (toggle)
 900     if (isset($_GET['untaggedonly'])) {
 901         $_SESSION['untaggedonly'] = empty($_SESSION['untaggedonly']);
 902
 903         if (! empty($_SERVER['HTTP_REFERER'])) {
 904             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('untaggedonly'));
 905         } else {
 906             $location = '?';
 907         }
 908         header('Location: '. $location);
 909         exit;
 910     }
 911
 912     // -------- Handle other actions allowed for non-logged in users:
 913     if (!$loginManager->isLoggedIn()) {
 914         // User tries to post new link but is not logged in:
 915         // Show login screen, then redirect to ?post=...
 916         if (isset($_GET['post'])) {
 917             header( // Redirect to login page, then back to post link.
 918                 'Location: ?do=login&post='.urlencode($_GET['post']).
 919                 (!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').
 920                 (!empty($_GET['description'])?'&description='.urlencode($_GET['description']):'').
 921                 (!empty($_GET['tags'])?'&tags='.urlencode($_GET['tags']):'').
 922                 (!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')
 923             );
 924             exit;
 925         }
 926
 927         showLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
 928         if (isset($_GET['edit_link'])) {
 929             header('Location: ?do=login&edit_link='. escape($_GET['edit_link']));
 930             exit;
 931         }
 932
 933         exit; // Never remove this one! All operations below are reserved for logged in user.
 934     }
 935
 936     // -------- All other functions are reserved for the registered user:
 937
 938     // -------- Display the Tools menu if requested (import/export/bookmarklet...)
 939     if ($targetPage == Router::$PAGE_TOOLS) {
 940         $data = [
 941             'pageabsaddr' => index_url($_SERVER),
 942             'sslenabled' => is_https($_SERVER),
 943         ];
 944         $pluginManager->executeHooks('render_tools', $data);
 945
 946         foreach ($data as $key => $value) {
 947             $PAGE->assign($key, $value);
 948         }
 949
 950         $PAGE->assign('pagetitle', t('Tools') .' - '. $conf->get('general.title', 'Shaarli'));
 951         $PAGE->renderPage('tools');
 952         exit;
 953     }
 954
 955     // -------- User wants to change his/her password.
 956     if ($targetPage == Router::$PAGE_CHANGEPASSWORD) {
 957         if ($conf->get('security.open_shaarli')) {
 958             die(t('You are not supposed to change a password on an Open Shaarli.'));
 959         }
 960
 961         if (!empty($_POST['setpassword']) && !empty($_POST['oldpassword'])) {
 962             if (!$sessionManager->checkToken($_POST['token'])) {
 963                 die(t('Wrong token.')); // Go away!
 964             }
 965
 966             // Make sure old password is correct.
 967             $oldhash = sha1(
 968                 $_POST['oldpassword'].$conf->get('credentials.login').$conf->get('credentials.salt')
 969             );
 970             if ($oldhash != $conf->get('credentials.hash')) {
 971                 echo '<script>alert("'
 972                     . t('The old password is not correct.')
 973                     .'");document.location=\'?do=changepasswd\';</script>';
 974                 exit;
 975             }
 976             // Save new password
 977             // Salt renders rainbow-tables attacks useless.
 978             $conf->set('credentials.salt', sha1(uniqid('', true) .'_'. mt_rand()));
 979             $conf->set(
 980                 'credentials.hash',
 981                 sha1(
 982                     $_POST['setpassword']
 983                     . $conf->get('credentials.login')
 984                     . $conf->get('credentials.salt')
 985                 )
 986             );
 987             try {
 988                 $conf->write($loginManager->isLoggedIn());
 989             } catch (Exception $e) {
 990                 error_log(
 991                     'ERROR while writing config file after changing password.' . PHP_EOL .
 992                     $e->getMessage()
 993                 );
 994
 995                 // TODO: do not handle exceptions/errors in JS.
 996                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=tools\';</script>';
 997                 exit;
 998             }
 999             echo '<script>alert("'. t('Your password has been changed') .'");document.location=\'?do=tools\';</script>';
1000             exit;
1001         } else {
1002             // show the change password form.
1003             $PAGE->assign('pagetitle', t('Change password') .' - '. $conf->get('general.title', 'Shaarli'));
1004             $PAGE->renderPage('changepassword');
1005             exit;
1006         }
1007     }
1008
1009     // -------- User wants to change configuration
1010     if ($targetPage == Router::$PAGE_CONFIGURE) {
1011         if (!empty($_POST['title'])) {
1012             if (!$sessionManager->checkToken($_POST['token'])) {
1013                 die(t('Wrong token.')); // Go away!
1014             }
1015             $tz = 'UTC';
1016             if (!empty($_POST['continent']) && !empty($_POST['city'])
1017                 && isTimeZoneValid($_POST['continent'], $_POST['city'])
1018             ) {
1019                 $tz = $_POST['continent'] . '/' . $_POST['city'];
1020             }
1021             $conf->set('general.timezone', $tz);
1022             $conf->set('general.title', escape($_POST['title']));
1023             $conf->set('general.header_link', escape($_POST['titleLink']));
1024             $conf->set('general.retrieve_description', !empty($_POST['retrieveDescription']));
1025             $conf->set('resource.theme', escape($_POST['theme']));
1026             $conf->set('security.session_protection_disabled', !empty($_POST['disablesessionprotection']));
1027             $conf->set('privacy.default_private_links', !empty($_POST['privateLinkByDefault']));
1028             $conf->set('feed.rss_permalinks', !empty($_POST['enableRssPermalinks']));
1029             $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1030             $conf->set('privacy.hide_public_links', !empty($_POST['hidePublicLinks']));
1031             $conf->set('api.enabled', !empty($_POST['enableApi']));
1032             $conf->set('api.secret', escape($_POST['apiSecret']));
1033             $conf->set('translation.language', escape($_POST['language']));
1034
1035             $thumbnailsMode = extension_loaded('gd') ? $_POST['enableThumbnails'] : Thumbnailer::MODE_NONE;
1036             if ($thumbnailsMode !== Thumbnailer::MODE_NONE
1037                 && $thumbnailsMode !== $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE)
1038             ) {
1039                 $_SESSION['warnings'][] = t(
1040                     'You have enabled or changed thumbnails mode. '
1041                     .'<a href="?do=thumbs_update">Please synchronize them</a>.'
1042                 );
1043             }
1044             $conf->set('thumbnails.mode', $thumbnailsMode);
1045
1046             try {
1047                 $conf->write($loginManager->isLoggedIn());
1048                 $history->updateSettings();
1049                 invalidateCaches($conf->get('resource.page_cache'));
1050             } catch (Exception $e) {
1051                 error_log(
1052                     'ERROR while writing config file after configuration update.' . PHP_EOL .
1053                     $e->getMessage()
1054                 );
1055
1056                 // TODO: do not handle exceptions/errors in JS.
1057                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=configure\';</script>';
1058                 exit;
1059             }
1060             echo '<script>alert("'. t('Configuration was saved.') .'");document.location=\'?do=configure\';</script>';
1061             exit;
1062         } else {
1063             // Show the configuration form.
1064             $PAGE->assign('title', $conf->get('general.title'));
1065             $PAGE->assign('theme', $conf->get('resource.theme'));
1066             $PAGE->assign('theme_available', ThemeUtils::getThemes($conf->get('resource.raintpl_tpl')));
1067             list($continents, $cities) = generateTimeZoneData(
1068                 timezone_identifiers_list(),
1069                 $conf->get('general.timezone')
1070             );
1071             $PAGE->assign('continents', $continents);
1072             $PAGE->assign('cities', $cities);
1073             $PAGE->assign('retrieve_description', $conf->get('general.retrieve_description'));
1074             $PAGE->assign('private_links_default', $conf->get('privacy.default_private_links', false));
1075             $PAGE->assign('session_protection_disabled', $conf->get('security.session_protection_disabled', false));
1076             $PAGE->assign('enable_rss_permalinks', $conf->get('feed.rss_permalinks', false));
1077             $PAGE->assign('enable_update_check', $conf->get('updates.check_updates', true));
1078             $PAGE->assign('hide_public_links', $conf->get('privacy.hide_public_links', false));
1079             $PAGE->assign('api_enabled', $conf->get('api.enabled', true));
1080             $PAGE->assign('api_secret', $conf->get('api.secret'));
1081             $PAGE->assign('languages', Languages::getAvailableLanguages());
1082             $PAGE->assign('gd_enabled', extension_loaded('gd'));
1083             $PAGE->assign('thumbnails_mode', $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE));
1084             $PAGE->assign('pagetitle', t('Configure') .' - '. $conf->get('general.title', 'Shaarli'));
1085             $PAGE->renderPage('configure');
1086             exit;
1087         }
1088     }
1089
1090     // -------- User wants to rename a tag or delete it
1091     if ($targetPage == Router::$PAGE_CHANGETAG) {
1092         if (empty($_POST['fromtag']) || (empty($_POST['totag']) && isset($_POST['renametag']))) {
1093             $PAGE->assign('fromtag', ! empty($_GET['fromtag']) ? escape($_GET['fromtag']) : '');
1094             $PAGE->assign('pagetitle', t('Manage tags') .' - '. $conf->get('general.title', 'Shaarli'));
1095             $PAGE->renderPage('changetag');
1096             exit;
1097         }
1098
1099         if (!$sessionManager->checkToken($_POST['token'])) {
1100             die(t('Wrong token.'));
1101         }
1102
1103         $toTag = isset($_POST['totag']) ? escape($_POST['totag']) : null;
1104         $alteredLinks = $LINKSDB->renameTag(escape($_POST['fromtag']), $toTag);
1105         $LINKSDB->save($conf->get('resource.page_cache'));
1106         foreach ($alteredLinks as $link) {
1107             $history->updateLink($link);
1108         }
1109         $delete = empty($_POST['totag']);
1110         $redirect = $delete ? 'do=changetag' : 'searchtags='. urlencode(escape($_POST['totag']));
1111         $count = count($alteredLinks);
1112         $alert = $delete
1113             ? sprintf(t('The tag was removed from %d link.', 'The tag was removed from %d links.', $count), $count)
1114             : sprintf(t('The tag was renamed in %d link.', 'The tag was renamed in %d links.', $count), $count);
1115         echo '<script>alert("'. $alert .'");document.location=\'?'. $redirect .'\';</script>';
1116         exit;
1117     }
1118
1119     // -------- User wants to add a link without using the bookmarklet: Show form.
1120     if ($targetPage == Router::$PAGE_ADDLINK) {
1121         $PAGE->assign('pagetitle', t('Shaare a new link') .' - '. $conf->get('general.title', 'Shaarli'));
1122         $PAGE->renderPage('addlink');
1123         exit;
1124     }
1125
1126     // -------- User clicked the "Save" button when editing a link: Save link to database.
1127     if (isset($_POST['save_edit'])) {
1128         // Go away!
1129         if (! $sessionManager->checkToken($_POST['token'])) {
1130             die(t('Wrong token.'));
1131         }
1132
1133         // lf_id should only be present if the link exists.
1134         $id = isset($_POST['lf_id']) ? intval(escape($_POST['lf_id'])) : $LINKSDB->getNextId();
1135         $link['id'] = $id;
1136         // Linkdate is kept here to:
1137         //   - use the same permalink for notes as they're displayed when creating them
1138         //   - let users hack creation date of their posts
1139         //     See: https://shaarli.readthedocs.io/en/master/guides/various-hacks/#changing-the-timestamp-for-a-shaare
1140         $linkdate = escape($_POST['lf_linkdate']);
1141         $link['created'] = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1142         if (isset($LINKSDB[$id])) {
1143             // Edit
1144             $link['updated'] = new DateTime();
1145             $link['shorturl'] = $LINKSDB[$id]['shorturl'];
1146             $link['sticky'] = isset($LINKSDB[$id]['sticky']) ? $LINKSDB[$id]['sticky'] : false;
1147             $new = false;
1148         } else {
1149             // New link
1150             $link['updated'] = null;
1151             $link['shorturl'] = link_small_hash($link['created'], $id);
1152             $link['sticky'] = false;
1153             $new = true;
1154         }
1155
1156         // Remove multiple spaces.
1157         $tags = trim(preg_replace('/\s\s+/', ' ', $_POST['lf_tags']));
1158         // Remove first '-' char in tags.
1159         $tags = preg_replace('/(^| )\-/', '$1', $tags);
1160         // Remove duplicates.
1161         $tags = implode(' ', array_unique(explode(' ', $tags)));
1162
1163         if (empty(trim($_POST['lf_url']))) {
1164             $_POST['lf_url'] = '?' . smallHash($linkdate . $id);
1165         }
1166         $url = whitelist_protocols(trim($_POST['lf_url']), $conf->get('security.allowed_protocols'));
1167
1168         $link = array_merge($link, [
1169             'title' => trim($_POST['lf_title']),
1170             'url' => $url,
1171             'description' => $_POST['lf_description'],
1172             'private' => (isset($_POST['lf_private']) ? 1 : 0),
1173             'tags' => str_replace(',', ' ', $tags),
1174         ]);
1175
1176         // If title is empty, use the URL as title.
1177         if ($link['title'] == '') {
1178             $link['title'] = $link['url'];
1179         }
1180
1181         if ($conf->get('thumbnails.mode', Thumbnailer::MODE_NONE) !== Thumbnailer::MODE_NONE
1182             && ! is_note($link['url'])
1183         ) {
1184             $thumbnailer = new Thumbnailer($conf);
1185             $link['thumbnail'] = $thumbnailer->get($url);
1186         }
1187
1188         $link['sticky'] = isset($link['sticky']) ? $link['sticky'] : false;
1189
1190         $pluginManager->executeHooks('save_link', $link);
1191
1192         $LINKSDB[$id] = $link;
1193         $LINKSDB->save($conf->get('resource.page_cache'));
1194         if ($new) {
1195             $history->addLink($link);
1196         } else {
1197             $history->updateLink($link);
1198         }
1199
1200         // If we are called from the bookmarklet, we must close the popup:
1201         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1202             echo '<script>self.close();</script>';
1203             exit;
1204         }
1205
1206         $returnurl = !empty($_POST['returnurl']) ? $_POST['returnurl'] : '?';
1207         $location = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1208         // Scroll to the link which has been edited.
1209         $location .= '#' . $link['shorturl'];
1210         // After saving the link, redirect to the page the user was on.
1211         header('Location: '. $location);
1212         exit;
1213     }
1214
1215     // -------- User clicked the "Cancel" button when editing a link.
1216     if (isset($_POST['cancel_edit'])) {
1217         $id = isset($_POST['lf_id']) ? (int) escape($_POST['lf_id']) : false;
1218         if (! isset($LINKSDB[$id])) {
1219             header('Location: ?');
1220         }
1221         // If we are called from the bookmarklet, we must close the popup:
1222         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1223             echo '<script>self.close();</script>';
1224             exit;
1225         }
1226         $link = $LINKSDB[$id];
1227         $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
1228         // Scroll to the link which has been edited.
1229         $returnurl .= '#'. $link['shorturl'];
1230         $returnurl = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1231         header('Location: '.$returnurl); // After canceling, redirect to the page the user was on.
1232         exit;
1233     }
1234
1235     // -------- User clicked the "Delete" button when editing a link: Delete link from database.
1236     if ($targetPage == Router::$PAGE_DELETELINK) {
1237         if (! $sessionManager->checkToken($_GET['token'])) {
1238             die(t('Wrong token.'));
1239         }
1240
1241         $ids = trim($_GET['lf_linkdate']);
1242         if (strpos($ids, ' ') !== false) {
1243             // multiple, space-separated ids provided
1244             $ids = array_values(array_filter(preg_split('/\s+/', escape($ids))));
1245         } else {
1246             // only a single id provided
1247             $ids = [$ids];
1248         }
1249         // assert at least one id is given
1250         if (!count($ids)) {
1251             die('no id provided');
1252         }
1253         foreach ($ids as $id) {
1254             $id = (int) escape($id);
1255             $link = $LINKSDB[$id];
1256             $pluginManager->executeHooks('delete_link', $link);
1257             $history->deleteLink($link);
1258             unset($LINKSDB[$id]);
1259         }
1260         $LINKSDB->save($conf->get('resource.page_cache')); // save to disk
1261
1262         // If we are called from the bookmarklet, we must close the popup:
1263         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1264             echo '<script>self.close();</script>';
1265             exit;
1266         }
1267
1268         $location = '?';
1269         if (isset($_SERVER['HTTP_REFERER'])) {
1270             // Don't redirect to where we were previously if it was a permalink or an edit_link, because it would 404.
1271             $location = generateLocation(
1272                 $_SERVER['HTTP_REFERER'],
1273                 $_SERVER['HTTP_HOST'],
1274                 ['delete_link', 'edit_link', $link['shorturl']]
1275             );
1276         }
1277
1278         header('Location: ' . $location); // After deleting the link, redirect to appropriate location
1279         exit;
1280     }
1281
1282     // -------- User clicked either "Set public" or "Set private" bulk operation
1283     if ($targetPage == Router::$PAGE_CHANGE_VISIBILITY) {
1284         if (! $sessionManager->checkToken($_GET['token'])) {
1285             die(t('Wrong token.'));
1286         }
1287
1288         $ids = trim($_GET['ids']);
1289         if (strpos($ids, ' ') !== false) {
1290             // multiple, space-separated ids provided
1291             $ids = array_values(array_filter(preg_split('/\s+/', escape($ids))));
1292         } else {
1293             // only a single id provided
1294             $ids = [$ids];
1295         }
1296
1297         // assert at least one id is given
1298         if (!count($ids)) {
1299             die('no id provided');
1300         }
1301         // assert that the visibility is valid
1302         if (!isset($_GET['newVisibility']) || !in_array($_GET['newVisibility'], ['public', 'private'])) {
1303             die('invalid visibility');
1304         } else {
1305             $private = $_GET['newVisibility'] === 'private';
1306         }
1307         foreach ($ids as $id) {
1308             $id = (int) escape($id);
1309             $link = $LINKSDB[$id];
1310             $link['private'] = $private;
1311             $pluginManager->executeHooks('save_link', $link);
1312             $LINKSDB[$id] = $link;
1313         }
1314         $LINKSDB->save($conf->get('resource.page_cache')); // save to disk
1315
1316         $location = '?';
1317         if (isset($_SERVER['HTTP_REFERER'])) {
1318             $location = generateLocation(
1319                 $_SERVER['HTTP_REFERER'],
1320                 $_SERVER['HTTP_HOST']
1321             );
1322         }
1323         header('Location: ' . $location); // After deleting the link, redirect to appropriate location
1324         exit;
1325     }
1326
1327     // -------- User clicked the "EDIT" button on a link: Display link edit form.
1328     if (isset($_GET['edit_link'])) {
1329         $id = (int) escape($_GET['edit_link']);
1330         $link = $LINKSDB[$id];  // Read database
1331         if (!$link) {
1332             header('Location: ?');
1333             exit;
1334         } // Link not found in database.
1335         $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1336         $data = array(
1337             'link' => $link,
1338             'link_is_new' => false,
1339             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1340             'tags' => $LINKSDB->linksCountPerTag(),
1341         );
1342         $pluginManager->executeHooks('render_editlink', $data);
1343
1344         foreach ($data as $key => $value) {
1345             $PAGE->assign($key, $value);
1346         }
1347
1348         $PAGE->assign('pagetitle', t('Edit') .' '. t('Shaare') .' - '. $conf->get('general.title', 'Shaarli'));
1349         $PAGE->renderPage('editlink');
1350         exit;
1351     }
1352
1353     // -------- User want to post a new link: Display link edit form.
1354     if (isset($_GET['post'])) {
1355         $url = cleanup_url($_GET['post']);
1356
1357         $link_is_new = false;
1358         // Check if URL is not already in database (in this case, we will edit the existing link)
1359         $link = $LINKSDB->getLinkFromUrl($url);
1360         if (! $link) {
1361             $link_is_new = true;
1362             $linkdate = strval(date(LinkDB::LINK_DATE_FORMAT));
1363             // Get title if it was provided in URL (by the bookmarklet).
1364             $title = empty($_GET['title']) ? '' : escape($_GET['title']);
1365             // Get description if it was provided in URL (by the bookmarklet). [Bronco added that]
1366             $description = empty($_GET['description']) ? '' : escape($_GET['description']);
1367             $tags = empty($_GET['tags']) ? '' : escape($_GET['tags']);
1368             $private = !empty($_GET['private']) && $_GET['private'] === "1" ? 1 : 0;
1369
1370             // If this is an HTTP(S) link, we try go get the page to extract
1371             // the title (otherwise we will to straight to the edit form.)
1372             if (empty($title) && strpos(get_url_scheme($url), 'http') !== false) {
1373                 $retrieveDescription = $conf->get('general.retrieve_description');
1374                 // Short timeout to keep the application responsive
1375                 // The callback will fill $charset and $title with data from the downloaded page.
1376                 get_http_response(
1377                     $url,
1378                     $conf->get('general.download_timeout', 30),
1379                     $conf->get('general.download_max_size', 4194304),
1380                     get_curl_download_callback($charset, $title, $description, $tags, $retrieveDescription)
1381                 );
1382                 if (! empty($title) && strtolower($charset) != 'utf-8') {
1383                     $title = mb_convert_encoding($title, 'utf-8', $charset);
1384                 }
1385             }
1386
1387             if ($url == '') {
1388                 $url = '?' . smallHash($linkdate . $LINKSDB->getNextId());
1389                 $title = $conf->get('general.default_note_title', t('Note: '));
1390             }
1391             $url = escape($url);
1392             $title = escape($title);
1393
1394             $link = array(
1395                 'linkdate' => $linkdate,
1396                 'title' => $title,
1397                 'url' => $url,
1398                 'description' => $description,
1399                 'tags' => $tags,
1400                 'private' => $private,
1401             );
1402         } else {
1403             $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1404         }
1405
1406         $data = array(
1407             'link' => $link,
1408             'link_is_new' => $link_is_new,
1409             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1410             'source' => (isset($_GET['source']) ? $_GET['source'] : ''),
1411             'tags' => $LINKSDB->linksCountPerTag(),
1412             'default_private_links' => $conf->get('privacy.default_private_links', false),
1413         );
1414         $pluginManager->executeHooks('render_editlink', $data);
1415
1416         foreach ($data as $key => $value) {
1417             $PAGE->assign($key, $value);
1418         }
1419
1420         $PAGE->assign('pagetitle', t('Shaare') .' - '. $conf->get('general.title', 'Shaarli'));
1421         $PAGE->renderPage('editlink');
1422         exit;
1423     }
1424
1425     if ($targetPage == Router::$PAGE_PINLINK) {
1426         if (! isset($_GET['id']) || empty($LINKSDB[$_GET['id']])) {
1427             // FIXME! Use a proper error system.
1428             $msg = t('Invalid link ID provided');
1429             echo '<script>alert("'. $msg .'");document.location=\''. index_url($_SERVER) .'\';</script>';
1430             exit;
1431         }
1432         if (! $sessionManager->checkToken($_GET['token'])) {
1433             die('Wrong token.');
1434         }
1435
1436         $link = $LINKSDB[$_GET['id']];
1437         $link['sticky'] = ! $link['sticky'];
1438         $LINKSDB[(int) $_GET['id']] = $link;
1439         $LINKSDB->save($conf->get('resource.page_cache'));
1440         header('Location: '.index_url($_SERVER));
1441         exit;
1442     }
1443
1444     if ($targetPage == Router::$PAGE_EXPORT) {
1445         // Export links as a Netscape Bookmarks file
1446
1447         if (empty($_GET['selection'])) {
1448             $PAGE->assign('pagetitle', t('Export') .' - '. $conf->get('general.title', 'Shaarli'));
1449             $PAGE->renderPage('export');
1450             exit;
1451         }
1452
1453         // export as bookmarks_(all|private|public)_YYYYmmdd_HHMMSS.html
1454         $selection = $_GET['selection'];
1455         if (isset($_GET['prepend_note_url'])) {
1456             $prependNoteUrl = $_GET['prepend_note_url'];
1457         } else {
1458             $prependNoteUrl = false;
1459         }
1460
1461         try {
1462             $PAGE->assign(
1463                 'links',
1464                 NetscapeBookmarkUtils::filterAndFormat(
1465                     $LINKSDB,
1466                     $selection,
1467                     $prependNoteUrl,
1468                     index_url($_SERVER)
1469                 )
1470             );
1471         } catch (Exception $exc) {
1472             header('Content-Type: text/plain; charset=utf-8');
1473             echo $exc->getMessage();
1474             exit;
1475         }
1476         $now = new DateTime();
1477         header('Content-Type: text/html; charset=utf-8');
1478         header(
1479             'Content-disposition: attachment; filename=bookmarks_'
1480             .$selection.'_'.$now->format(LinkDB::LINK_DATE_FORMAT).'.html'
1481         );
1482         $PAGE->assign('date', $now->format(DateTime::RFC822));
1483         $PAGE->assign('eol', PHP_EOL);
1484         $PAGE->assign('selection', $selection);
1485         $PAGE->renderPage('export.bookmarks');
1486         exit;
1487     }
1488
1489     if ($targetPage == Router::$PAGE_IMPORT) {
1490         // Upload a Netscape bookmark dump to import its contents
1491
1492         if (! isset($_POST['token']) || ! isset($_FILES['filetoupload'])) {
1493             // Show import dialog
1494             $PAGE->assign(
1495                 'maxfilesize',
1496                 get_max_upload_size(
1497                     ini_get('post_max_size'),
1498                     ini_get('upload_max_filesize'),
1499                     false
1500                 )
1501             );
1502             $PAGE->assign(
1503                 'maxfilesizeHuman',
1504                 get_max_upload_size(
1505                     ini_get('post_max_size'),
1506                     ini_get('upload_max_filesize'),
1507                     true
1508                 )
1509             );
1510             $PAGE->assign('pagetitle', t('Import') .' - '. $conf->get('general.title', 'Shaarli'));
1511             $PAGE->renderPage('import');
1512             exit;
1513         }
1514
1515         // Import bookmarks from an uploaded file
1516         if (isset($_FILES['filetoupload']['size']) && $_FILES['filetoupload']['size'] == 0) {
1517             // The file is too big or some form field may be missing.
1518             $msg = sprintf(
1519                 t(
1520                     'The file you are trying to upload is probably bigger than what this webserver can accept'
1521                     .' (%s). Please upload in smaller chunks.'
1522                 ),
1523                 get_max_upload_size(ini_get('post_max_size'), ini_get('upload_max_filesize'))
1524             );
1525             echo '<script>alert("'. $msg .'");document.location=\'?do='.Router::$PAGE_IMPORT .'\';</script>';
1526             exit;
1527         }
1528         if (! $sessionManager->checkToken($_POST['token'])) {
1529             die('Wrong token.');
1530         }
1531         $status = NetscapeBookmarkUtils::import(
1532             $_POST,
1533             $_FILES,
1534             $LINKSDB,
1535             $conf,
1536             $history
1537         );
1538         echo '<script>alert("'.$status.'");document.location=\'?do='
1539              .Router::$PAGE_IMPORT .'\';</script>';
1540         exit;
1541     }
1542
1543     // Plugin administration page
1544     if ($targetPage == Router::$PAGE_PLUGINSADMIN) {
1545         $pluginMeta = $pluginManager->getPluginsMeta();
1546
1547         // Split plugins into 2 arrays: ordered enabled plugins and disabled.
1548         $enabledPlugins = array_filter($pluginMeta, function ($v) {
1549             return $v['order'] !== false;
1550         });
1551         // Load parameters.
1552         $enabledPlugins = load_plugin_parameter_values($enabledPlugins, $conf->get('plugins', array()));
1553         uasort(
1554             $enabledPlugins,
1555             function ($a, $b) {
1556                 return $a['order'] - $b['order'];
1557             }
1558         );
1559         $disabledPlugins = array_filter($pluginMeta, function ($v) {
1560             return $v['order'] === false;
1561         });
1562
1563         $PAGE->assign('enabledPlugins', $enabledPlugins);
1564         $PAGE->assign('disabledPlugins', $disabledPlugins);
1565         $PAGE->assign('pagetitle', t('Plugin administration') .' - '. $conf->get('general.title', 'Shaarli'));
1566         $PAGE->renderPage('pluginsadmin');
1567         exit;
1568     }
1569
1570     // Plugin administration form action
1571     if ($targetPage == Router::$PAGE_SAVE_PLUGINSADMIN) {
1572         try {
1573             if (isset($_POST['parameters_form'])) {
1574                 $pluginManager->executeHooks('save_plugin_parameters', $_POST);
1575                 unset($_POST['parameters_form']);
1576                 foreach ($_POST as $param => $value) {
1577                     $conf->set('plugins.'. $param, escape($value));
1578                 }
1579             } else {
1580                 $conf->set('general.enabled_plugins', save_plugin_config($_POST));
1581             }
1582             $conf->write($loginManager->isLoggedIn());
1583             $history->updateSettings();
1584         } catch (Exception $e) {
1585             error_log(
1586                 'ERROR while saving plugin configuration:.' . PHP_EOL .
1587                 $e->getMessage()
1588             );
1589
1590             // TODO: do not handle exceptions/errors in JS.
1591             echo '<script>alert("'
1592                 . $e->getMessage()
1593                 .'");document.location=\'?do='
1594                 . Router::$PAGE_PLUGINSADMIN
1595                 .'\';</script>';
1596             exit;
1597         }
1598         header('Location: ?do='. Router::$PAGE_PLUGINSADMIN);
1599         exit;
1600     }
1601
1602     // Get a fresh token
1603     if ($targetPage == Router::$GET_TOKEN) {
1604         header('Content-Type:text/plain');
1605         echo $sessionManager->generateToken($conf);
1606         exit;
1607     }
1608
1609     // -------- Thumbnails Update
1610     if ($targetPage == Router::$PAGE_THUMBS_UPDATE) {
1611         $ids = [];
1612         foreach ($LINKSDB as $link) {
1613             // A note or not HTTP(S)
1614             if (is_note($link['url']) || ! startsWith(strtolower($link['url']), 'http')) {
1615                 continue;
1616             }
1617             $ids[] = $link['id'];
1618         }
1619         $PAGE->assign('ids', $ids);
1620         $PAGE->assign('pagetitle', t('Thumbnails update') .' - '. $conf->get('general.title', 'Shaarli'));
1621         $PAGE->renderPage('thumbnails');
1622         exit;
1623     }
1624
1625     // -------- Single Thumbnail Update
1626     if ($targetPage == Router::$AJAX_THUMB_UPDATE) {
1627         if (! isset($_POST['id']) || ! ctype_digit($_POST['id'])) {
1628             http_response_code(400);
1629             exit;
1630         }
1631         $id = (int) $_POST['id'];
1632         if (empty($LINKSDB[$id])) {
1633             http_response_code(404);
1634             exit;
1635         }
1636         $thumbnailer = new Thumbnailer($conf);
1637         $link = $LINKSDB[$id];
1638         $link['thumbnail'] = $thumbnailer->get($link['url']);
1639         $LINKSDB[$id] = $link;
1640         $LINKSDB->save($conf->get('resource.page_cache'));
1641
1642         echo json_encode($link);
1643         exit;
1644     }
1645
1646     // -------- Otherwise, simply display search form and links:
1647     showLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
1648     exit;
1649 }
1650
1651 /**
1652  * Template for the list of links (<div id="linklist">)
1653  * This function fills all the necessary fields in the $PAGE for the template 'linklist.html'
1654  *
1655  * @param pageBuilder   $PAGE          pageBuilder instance.
1656  * @param LinkDB        $LINKSDB       LinkDB instance.
1657  * @param ConfigManager $conf          Configuration Manager instance.
1658  * @param PluginManager $pluginManager Plugin Manager instance.
1659  * @param LoginManager  $loginManager  LoginManager instance
1660  */
1661 function buildLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager)
1662 {
1663     // Used in templates
1664     if (isset($_GET['searchtags'])) {
1665         if (! empty($_GET['searchtags'])) {
1666             $searchtags = escape(normalize_spaces($_GET['searchtags']));
1667         } else {
1668             $searchtags = false;
1669         }
1670     } else {
1671         $searchtags = '';
1672     }
1673     $searchterm = !empty($_GET['searchterm']) ? escape(normalize_spaces($_GET['searchterm'])) : '';
1674
1675     // Smallhash filter
1676     if (! empty($_SERVER['QUERY_STRING'])
1677         && preg_match('/^[a-zA-Z0-9-_@]{6}($|&|#)/', $_SERVER['QUERY_STRING'])) {
1678         try {
1679             $linksToDisplay = $LINKSDB->filterHash($_SERVER['QUERY_STRING']);
1680         } catch (LinkNotFoundException $e) {
1681             $PAGE->render404($e->getMessage());
1682             exit;
1683         }
1684     } else {
1685         // Filter links according search parameters.
1686         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
1687         $request = [
1688             'searchtags' => $searchtags,
1689             'searchterm' => $searchterm,
1690         ];
1691         $linksToDisplay = $LINKSDB->filterSearch($request, false, $visibility, !empty($_SESSION['untaggedonly']));
1692     }
1693
1694     // ---- Handle paging.
1695     $keys = array();
1696     foreach ($linksToDisplay as $key => $value) {
1697         $keys[] = $key;
1698     }
1699
1700     // Select articles according to paging.
1701     $pagecount = ceil(count($keys) / $_SESSION['LINKS_PER_PAGE']);
1702     $pagecount = $pagecount == 0 ? 1 : $pagecount;
1703     $page= empty($_GET['page']) ? 1 : intval($_GET['page']);
1704     $page = $page < 1 ? 1 : $page;
1705     $page = $page > $pagecount ? $pagecount : $page;
1706     // Start index.
1707     $i = ($page-1) * $_SESSION['LINKS_PER_PAGE'];
1708     $end = $i + $_SESSION['LINKS_PER_PAGE'];
1709
1710     $thumbnailsEnabled = $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE) !== Thumbnailer::MODE_NONE;
1711     if ($thumbnailsEnabled) {
1712         $thumbnailer = new Thumbnailer($conf);
1713     }
1714
1715     $linkDisp = array();
1716     while ($i<$end && $i<count($keys)) {
1717         $link = $linksToDisplay[$keys[$i]];
1718         $link['description'] = format_description($link['description']);
1719         $classLi =  ($i % 2) != 0 ? '' : 'publicLinkHightLight';
1720         $link['class'] = $link['private'] == 0 ? $classLi : 'private';
1721         $link['timestamp'] = $link['created']->getTimestamp();
1722         if (! empty($link['updated'])) {
1723             $link['updated_timestamp'] = $link['updated']->getTimestamp();
1724         } else {
1725             $link['updated_timestamp'] = '';
1726         }
1727         $taglist = preg_split('/\s+/', $link['tags'], -1, PREG_SPLIT_NO_EMPTY);
1728         uasort($taglist, 'strcasecmp');
1729         $link['taglist'] = $taglist;
1730
1731         // Logged in, thumbnails enabled, not a note,
1732         // and (never retrieved yet or no valid cache file)
1733         if ($loginManager->isLoggedIn() && $thumbnailsEnabled && $link['url'][0] != '?'
1734             && (! isset($link['thumbnail']) || ($link['thumbnail'] !== false && ! is_file($link['thumbnail'])))
1735         ) {
1736             $elem = $LINKSDB[$keys[$i]];
1737             $elem['thumbnail'] = $thumbnailer->get($link['url']);
1738             $LINKSDB[$keys[$i]] = $elem;
1739             $updateDB = true;
1740             $link['thumbnail'] = $elem['thumbnail'];
1741         }
1742
1743         // Check for both signs of a note: starting with ? and 7 chars long.
1744         if ($link['url'][0] === '?' && strlen($link['url']) === 7) {
1745             $link['url'] = index_url($_SERVER) . $link['url'];
1746         }
1747
1748         $linkDisp[$keys[$i]] = $link;
1749         $i++;
1750     }
1751
1752     // If we retrieved new thumbnails, we update the database.
1753     if (!empty($updateDB)) {
1754         $LINKSDB->save($conf->get('resource.page_cache'));
1755     }
1756
1757     // Compute paging navigation
1758     $searchtagsUrl = $searchtags === '' ? '' : '&searchtags=' . urlencode($searchtags);
1759     $searchtermUrl = empty($searchterm) ? '' : '&searchterm=' . urlencode($searchterm);
1760     $previous_page_url = '';
1761     if ($i != count($keys)) {
1762         $previous_page_url = '?page=' . ($page+1) . $searchtermUrl . $searchtagsUrl;
1763     }
1764     $next_page_url='';
1765     if ($page>1) {
1766         $next_page_url = '?page=' . ($page-1) . $searchtermUrl . $searchtagsUrl;
1767     }
1768
1769     // Fill all template fields.
1770     $data = array(
1771         'previous_page_url' => $previous_page_url,
1772         'next_page_url' => $next_page_url,
1773         'page_current' => $page,
1774         'page_max' => $pagecount,
1775         'result_count' => count($linksToDisplay),
1776         'search_term' => $searchterm,
1777         'search_tags' => $searchtags,
1778         'visibility' => ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '',
1779         'links' => $linkDisp,
1780     );
1781
1782     // If there is only a single link, we change on-the-fly the title of the page.
1783     if (count($linksToDisplay) == 1) {
1784         $data['pagetitle'] = $linksToDisplay[$keys[0]]['title'] .' - '. $conf->get('general.title');
1785     } elseif (! empty($searchterm) || ! empty($searchtags)) {
1786         $data['pagetitle'] = t('Search: ');
1787         $data['pagetitle'] .= ! empty($searchterm) ? $searchterm .' ' : '';
1788         $bracketWrap = function ($tag) {
1789             return '['. $tag .']';
1790         };
1791         $data['pagetitle'] .= ! empty($searchtags)
1792             ? implode(' ', array_map($bracketWrap, preg_split('/\s+/', $searchtags))).' '
1793             : '';
1794         $data['pagetitle'] .= '- '. $conf->get('general.title');
1795     }
1796
1797     $pluginManager->executeHooks('render_linklist', $data, array('loggedin' => $loginManager->isLoggedIn()));
1798
1799     foreach ($data as $key => $value) {
1800         $PAGE->assign($key, $value);
1801     }
1802
1803     return;
1804 }
1805
1806 /**
1807  * Installation
1808  * This function should NEVER be called if the file data/config.php exists.
1809  *
1810  * @param ConfigManager  $conf           Configuration Manager instance.
1811  * @param SessionManager $sessionManager SessionManager instance
1812  * @param LoginManager   $loginManager   LoginManager instance
1813  */
1814 function install($conf, $sessionManager, $loginManager)
1815 {
1816     // On free.fr host, make sure the /sessions directory exists, otherwise login will not work.
1817     if (endsWith($_SERVER['HTTP_HOST'], '.free.fr') && !is_dir($_SERVER['DOCUMENT_ROOT'].'/sessions')) {
1818         mkdir($_SERVER['DOCUMENT_ROOT'].'/sessions', 0705);
1819     }
1820
1821
1822     // This part makes sure sessions works correctly.
1823     // (Because on some hosts, session.save_path may not be set correctly,
1824     // or we may not have write access to it.)
1825     if (isset($_GET['test_session'])
1826         && ( !isset($_SESSION) || !isset($_SESSION['session_tested']) || $_SESSION['session_tested']!='Working')) {
1827         // Step 2: Check if data in session is correct.
1828         $msg = t(
1829             '<pre>Sessions do not seem to work correctly on your server.<br>'.
1830             'Make sure the variable "session.save_path" is set correctly in your PHP config, '.
1831             'and that you have write access to it.<br>'.
1832             'It currently points to %s.<br>'.
1833             'On some browsers, accessing your server via a hostname like \'localhost\' '.
1834             'or any custom hostname without a dot causes cookie storage to fail. '.
1835             'We recommend accessing your server via it\'s IP address or Fully Qualified Domain Name.<br>'
1836         );
1837         $msg = sprintf($msg, session_save_path());
1838         echo $msg;
1839         echo '<br><a href="?">'. t('Click to try again.') .'</a></pre>';
1840         die;
1841     }
1842     if (!isset($_SESSION['session_tested'])) {
1843         // Step 1 : Try to store data in session and reload page.
1844         $_SESSION['session_tested'] = 'Working';  // Try to set a variable in session.
1845         header('Location: '.index_url($_SERVER).'?test_session');  // Redirect to check stored data.
1846     }
1847     if (isset($_GET['test_session'])) {
1848         // Step 3: Sessions are OK. Remove test parameter from URL.
1849         header('Location: '.index_url($_SERVER));
1850     }
1851
1852
1853     if (!empty($_POST['setlogin']) && !empty($_POST['setpassword'])) {
1854         $tz = 'UTC';
1855         if (!empty($_POST['continent']) && !empty($_POST['city'])
1856             && isTimeZoneValid($_POST['continent'], $_POST['city'])
1857         ) {
1858             $tz = $_POST['continent'].'/'.$_POST['city'];
1859         }
1860         $conf->set('general.timezone', $tz);
1861         $login = $_POST['setlogin'];
1862         $conf->set('credentials.login', $login);
1863         $salt = sha1(uniqid('', true) .'_'. mt_rand());
1864         $conf->set('credentials.salt', $salt);
1865         $conf->set('credentials.hash', sha1($_POST['setpassword'] . $login . $salt));
1866         if (!empty($_POST['title'])) {
1867             $conf->set('general.title', escape($_POST['title']));
1868         } else {
1869             $conf->set('general.title', 'Shared links on '.escape(index_url($_SERVER)));
1870         }
1871         $conf->set('translation.language', escape($_POST['language']));
1872         $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1873         $conf->set('api.enabled', !empty($_POST['enableApi']));
1874         $conf->set(
1875             'api.secret',
1876             generate_api_secret(
1877                 $conf->get('credentials.login'),
1878                 $conf->get('credentials.salt')
1879             )
1880         );
1881         try {
1882             // Everything is ok, let's create config file.
1883             $conf->write($loginManager->isLoggedIn());
1884         } catch (Exception $e) {
1885             error_log(
1886                 'ERROR while writing config file after installation.' . PHP_EOL .
1887                     $e->getMessage()
1888             );
1889
1890             // TODO: do not handle exceptions/errors in JS.
1891             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?\';</script>';
1892             exit;
1893         }
1894         echo '<script>alert('
1895             .'"Shaarli is now configured. '
1896             .'Please enter your login/password and start shaaring your links!"'
1897             .');document.location=\'?do=login\';</script>';
1898         exit;
1899     }
1900
1901     $PAGE = new PageBuilder($conf, $_SESSION, null, $sessionManager->generateToken());
1902     list($continents, $cities) = generateTimeZoneData(timezone_identifiers_list(), date_default_timezone_get());
1903     $PAGE->assign('continents', $continents);
1904     $PAGE->assign('cities', $cities);
1905     $PAGE->assign('languages', Languages::getAvailableLanguages());
1906     $PAGE->renderPage('install');
1907     exit;
1908 }
1909
1910 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=dailyrss')) {
1911     showDailyRSS($conf, $loginManager);
1912     exit;
1913 }
1914
1915 if (!isset($_SESSION['LINKS_PER_PAGE'])) {
1916     $_SESSION['LINKS_PER_PAGE'] = $conf->get('general.links_per_page', 20);
1917 }
1918
1919 try {
1920     $history = new History($conf->get('resource.history'));
1921 } catch (Exception $e) {
1922     die($e->getMessage());
1923 }
1924
1925 $linkDb = new LinkDB(
1926     $conf->get('resource.datastore'),
1927     $loginManager->isLoggedIn(),
1928     $conf->get('privacy.hide_public_links')
1929 );
1930
1931 $container = new \Slim\Container();
1932 $container['conf'] = $conf;
1933 $container['plugins'] = $pluginManager;
1934 $container['history'] = $history;
1935 $app = new \Slim\App($container);
1936
1937 // REST API routes
1938 $app->group('/api/v1', function () {
1939     $this->get('/info', '\Shaarli\Api\Controllers\Info:getInfo')->setName('getInfo');
1940     $this->get('/links', '\Shaarli\Api\Controllers\Links:getLinks')->setName('getLinks');
1941     $this->get('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:getLink')->setName('getLink');
1942     $this->post('/links', '\Shaarli\Api\Controllers\Links:postLink')->setName('postLink');
1943     $this->put('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:putLink')->setName('putLink');
1944     $this->delete('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:deleteLink')->setName('deleteLink');
1945
1946     $this->get('/tags', '\Shaarli\Api\Controllers\Tags:getTags')->setName('getTags');
1947     $this->get('/tags/{tagName:[\w]+}', '\Shaarli\Api\Controllers\Tags:getTag')->setName('getTag');
1948     $this->put('/tags/{tagName:[\w]+}', '\Shaarli\Api\Controllers\Tags:putTag')->setName('putTag');
1949     $this->delete('/tags/{tagName:[\w]+}', '\Shaarli\Api\Controllers\Tags:deleteTag')->setName('deleteTag');
1950
1951     $this->get('/history', '\Shaarli\Api\Controllers\HistoryController:getHistory')->setName('getHistory');
1952 })->add('\Shaarli\Api\ApiMiddleware');
1953
1954 $response = $app->run(true);
1955
1956 // Hack to make Slim and Shaarli router work together:
1957 // If a Slim route isn't found and NOT API call, we call renderPage().
1958 if ($response->getStatusCode() == 404 && strpos($_SERVER['REQUEST_URI'], '/api/v1') === false) {
1959     // We use UTF-8 for proper international characters handling.
1960     header('Content-Type: text/html; charset=utf-8');
1961     renderPage($conf, $pluginManager, $linkDb, $history, $sessionManager, $loginManager);
1962 } else {
1963     $response = $response
1964         ->withHeader('Access-Control-Allow-Origin', '*')
1965         ->withHeader(
1966             'Access-Control-Allow-Headers',
1967             'X-Requested-With, Content-Type, Accept, Origin, Authorization'
1968         )
1969         ->withHeader('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE, OPTIONS');
1970     $app->respond($response);
1971 }