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