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