index.php

   1 <?php
   2 /**
   3  * Shaarli - The personal, minimalist, super-fast, database free, bookmarking service.
   4  *
   5  * Friendly fork by the Shaarli community:
   6  *  - https://github.com/shaarli/Shaarli
   7  *
   8  * Original project by sebsauvage.net:
   9  *  - http://sebsauvage.net/wiki/doku.php?id=php:shaarli
  10  *  - https://github.com/sebsauvage/Shaarli
  11  *
  12  * Licence: http://www.opensource.org/licenses/zlib-license.php
  13  *
  14  * Requires: PHP 5.5.x
  15  */
  16
  17 // Set 'UTC' as the default timezone if it is not defined in php.ini
  18 // See http://php.net/manual/en/datetime.configuration.php#ini.date.timezone
  19 if (date_default_timezone_get() == '') {
  20     date_default_timezone_set('UTC');
  21 }
  22
  23 /*
  24  * PHP configuration
  25  */
  26
  27 // http://server.com/x/shaarli --> /shaarli/
  28 define('WEB_PATH', substr($_SERVER['REQUEST_URI'], 0, 1+strrpos($_SERVER['REQUEST_URI'], '/', 0)));
  29
  30 // High execution time in case of problematic imports/exports.
  31 ini_set('max_input_time','60');
  32
  33 // Try to set max upload file size and read
  34 ini_set('memory_limit', '128M');
  35 ini_set('post_max_size', '16M');
  36 ini_set('upload_max_filesize', '16M');
  37
  38 // See all error except warnings
  39 error_reporting(E_ALL^E_WARNING);
  40 // See all errors (for debugging only)
  41 //error_reporting(-1);
  42
  43
  44 // 3rd-party libraries
  45 if (! file_exists(__DIR__ . '/vendor/autoload.php')) {
  46     header('Content-Type: text/plain; charset=utf-8');
  47     echo "Error: missing Composer configuration\n\n"
  48         ."If you installed Shaarli through Git or using the development branch,\n"
  49         ."please refer to the installation documentation to install PHP"
  50         ." dependencies using Composer:\n"
  51         ."- https://shaarli.readthedocs.io/en/master/Server-configuration/\n"
  52         ."- https://shaarli.readthedocs.io/en/master/Download-and-Installation/";
  53     exit;
  54 }
  55 require_once 'inc/rain.tpl.class.php';
  56 require_once __DIR__ . '/vendor/autoload.php';
  57
  58 // Shaarli library
  59 require_once 'application/ApplicationUtils.php';
  60 require_once 'application/Cache.php';
  61 require_once 'application/CachedPage.php';
  62 require_once 'application/config/ConfigPlugin.php';
  63 require_once 'application/FeedBuilder.php';
  64 require_once 'application/FileUtils.php';
  65 require_once 'application/History.php';
  66 require_once 'application/HttpUtils.php';
  67 require_once 'application/LinkDB.php';
  68 require_once 'application/LinkFilter.php';
  69 require_once 'application/LinkUtils.php';
  70 require_once 'application/NetscapeBookmarkUtils.php';
  71 require_once 'application/PageBuilder.php';
  72 require_once 'application/TimeZone.php';
  73 require_once 'application/Url.php';
  74 require_once 'application/Utils.php';
  75 require_once 'application/PluginManager.php';
  76 require_once 'application/Router.php';
  77 require_once 'application/Updater.php';
  78 use \Shaarli\Config\ConfigManager;
  79 use \Shaarli\Languages;
  80 use \Shaarli\Security\LoginManager;
  81 use \Shaarli\Security\SessionManager;
  82 use \Shaarli\ThemeUtils;
  83 use \Shaarli\Thumbnailer;
  84
  85 // Ensure the PHP version is supported
  86 try {
  87     ApplicationUtils::checkPHPVersion('5.5', PHP_VERSION);
  88 } catch(Exception $exc) {
  89     header('Content-Type: text/plain; charset=utf-8');
  90     echo $exc->getMessage();
  91     exit;
  92 }
  93
  94 define('SHAARLI_VERSION', ApplicationUtils::getVersion(__DIR__ .'/'. ApplicationUtils::$VERSION_FILE));
  95
  96 // Force cookie path (but do not change lifetime)
  97 $cookie = session_get_cookie_params();
  98 $cookiedir = '';
  99 if (dirname($_SERVER['SCRIPT_NAME']) != '/') {
 100     $cookiedir = dirname($_SERVER["SCRIPT_NAME"]).'/';
 101 }
 102 // Set default cookie expiration and path.
 103 session_set_cookie_params($cookie['lifetime'], $cookiedir, $_SERVER['SERVER_NAME']);
 104 // Set session parameters on server side.
 105 // Use cookies to store session.
 106 ini_set('session.use_cookies', 1);
 107 // Force cookies for session (phpsessionID forbidden in URL).
 108 ini_set('session.use_only_cookies', 1);
 109 // Prevent PHP form using sessionID in URL if cookies are disabled.
 110 ini_set('session.use_trans_sid', false);
 111
 112 session_name('shaarli');
 113 // Start session if needed (Some server auto-start sessions).
 114 if (session_id() == '') {
 115     session_start();
 116 }
 117
 118 // Regenerate session ID if invalid or not defined in cookie.
 119 if (isset($_COOKIE['shaarli']) && !SessionManager::checkId($_COOKIE['shaarli'])) {
 120     session_regenerate_id(true);
 121     $_COOKIE['shaarli'] = session_id();
 122 }
 123
 124 $folderBase = getenv("BASE");
 125
 126 if (getenv("USERSPACE")) {
 127     if (isset($_GET["do"]) && $_GET["do"] == "login") {
 128         header("Location: $folderBase/?do=login");
 129         exit;
 130     }
 131     $userspace = preg_replace("/[^-_A-Za-z0-9]/", '', getenv("USERSPACE"));
 132 } else if (isset($_SESSION["username"]) && $_SESSION["username"]) {
 133     header("Location: " . $folderBase . "/" . $_SESSION["username"] . "?");
 134     exit;
 135 } else if (!isset($_GET["do"]) || $_GET["do"] != "login") {
 136     header("Location: $folderBase/?do=login");
 137     exit;
 138 }
 139
 140 if (!isset($userspace) && isset($_POST["login"])) {
 141     $userspace = preg_replace("/[^-_A-Za-z0-9]/", '', $_POST["login"]);
 142     error_log("debugImmae: setting userspace from POST: " . $userspace);
 143 }
 144
 145 if (isset($userspace)) {
 146   $conf = new ConfigManager(null, $userspace);
 147 } else {
 148   $conf = new ConfigManager();
 149 }
 150 $sessionManager = new SessionManager($_SESSION, $conf);
 151 $loginManager = new LoginManager($GLOBALS, $conf, $sessionManager);
 152 $loginManager->generateStaySignedInToken($_SERVER['REMOTE_ADDR']);
 153 $clientIpId = client_ip_id($_SERVER);
 154
 155 // LC_MESSAGES isn't defined without php-intl, in this case use LC_COLLATE locale instead.
 156 if (! defined('LC_MESSAGES')) {
 157     define('LC_MESSAGES', LC_COLLATE);
 158 }
 159
 160 // Sniff browser language and set date format accordingly.
 161 if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
 162     autoLocale($_SERVER['HTTP_ACCEPT_LANGUAGE']);
 163 }
 164
 165 new Languages(setlocale(LC_MESSAGES, 0), $conf);
 166
 167 $conf->setEmpty('general.timezone', date_default_timezone_get());
 168 $conf->setEmpty('general.title', t('Shared links on '). escape(index_url($_SERVER)));
 169 RainTPL::$tpl_dir = $conf->get('resource.raintpl_tpl').'/'.$conf->get('resource.theme').'/'; // template directory
 170 RainTPL::$cache_dir = $conf->get('resource.raintpl_tmp'); // cache directory
 171
 172 $pluginManager = new PluginManager($conf);
 173 $pluginManager->load($conf->get('general.enabled_plugins'));
 174
 175 date_default_timezone_set($conf->get('general.timezone', 'UTC'));
 176
 177 ob_start();  // Output buffering for the page cache.
 178
 179 // Prevent caching on client side or proxy: (yes, it's ugly)
 180 header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
 181 header("Cache-Control: no-store, no-cache, must-revalidate");
 182 header("Cache-Control: post-check=0, pre-check=0", false);
 183 header("Pragma: no-cache");
 184
 185 if (! is_file($conf->getConfigFileExt())) {
 186     // Ensure Shaarli has proper access to its resources
 187     $errors = ApplicationUtils::checkResourcePermissions($conf);
 188
 189     if ($errors != array()) {
 190         $message = '<p>'. t('Insufficient permissions:') .'</p><ul>';
 191
 192         foreach ($errors as $error) {
 193             $message .= '<li>'.$error.'</li>';
 194         }
 195         $message .= '</ul>';
 196
 197         header('Content-Type: text/html; charset=utf-8');
 198         echo $message;
 199         exit;
 200     }
 201
 202     // Display the installation form if no existing config is found
 203     install($conf, $sessionManager, $loginManager, $userspace);
 204 }
 205
 206 $loginManager->checkLoginState($_COOKIE, $clientIpId);
 207
 208 /**
 209  * Adapter function to ensure compatibility with third-party templates
 210  *
 211  * @see https://github.com/shaarli/Shaarli/pull/1086
 212  *
 213  * @return bool true when the user is logged in, false otherwise
 214  */
 215 function isLoggedIn()
 216 {
 217     global $loginManager;
 218     return $loginManager->isLoggedIn();
 219 }
 220
 221
 222 // ------------------------------------------------------------------------------------------
 223 // Process login form: Check if login/password is correct.
 224 if (isset($_POST['login'])) {
 225     if (! $loginManager->canLogin($_SERVER)) {
 226         die(t('I said: NO. You are banned for the moment. Go away.'));
 227     }
 228     if (isset($_POST['password'])
 229         && $sessionManager->checkToken($_POST['token'])
 230         && $loginManager->checkCredentials($_SERVER['REMOTE_ADDR'], $clientIpId, $_POST['login'], $_POST['password'])
 231     ) {
 232         $loginManager->handleSuccessfulLogin($_SERVER);
 233         $userspace = $_POST['login'];
 234
 235         $cookiedir = '';
 236         if (dirname($_SERVER['SCRIPT_NAME']) != '/') {
 237             // Note: Never forget the trailing slash on the cookie path!
 238             $cookiedir = dirname($_SERVER["SCRIPT_NAME"]) . '/';
 239         }
 240
 241         if (!empty($_POST['longlastingsession'])) {
 242             // Keep the session cookie even after the browser closes
 243             $sessionManager->setStaySignedIn(true);
 244             $expirationTime = $sessionManager->extendSession();
 245
 246             setcookie(
 247                 $loginManager::$STAY_SIGNED_IN_COOKIE,
 248                 $loginManager->getStaySignedInToken(),
 249                 $expirationTime,
 250                 WEB_PATH
 251             );
 252
 253         } else {
 254             // Standard session expiration (=when browser closes)
 255             $expirationTime = 0;
 256         }
 257
 258         // Send cookie with the new expiration date to the browser
 259         session_set_cookie_params($expirationTime, $cookiedir, $_SERVER['SERVER_NAME']);
 260         session_regenerate_id(true);
 261
 262         // Optional redirect after login:
 263         if (isset($_GET['post'])) {
 264             $uri = '?post='. urlencode($_GET['post']);
 265             foreach (array('description', 'source', 'title', 'tags') as $param) {
 266                 if (!empty($_GET[$param])) {
 267                     $uri .= '&'.$param.'='.urlencode($_GET[$param]);
 268                 }
 269             }
 270             header('Location: '. $userspace . $uri);
 271             exit;
 272         }
 273
 274         if (isset($_GET['edit_link'])) {
 275             header('Location: ' . $userspace . '?edit_link='. escape($_GET['edit_link']));
 276             exit;
 277         }
 278
 279         if (isset($_POST['returnurl'])) {
 280             // Prevent loops over login screen.
 281             if (strpos($_POST['returnurl'], 'do=login') === false) {
 282                 header('Location: ' . generateLocation($_POST['returnurl'], $_SERVER['HTTP_HOST']));
 283                 exit;
 284             }
 285         }
 286         header('Location: '. $userspace . '?'); exit;
 287     } else {
 288         $errorReason = $loginManager->handleFailedLogin($_SERVER);
 289         $redir = '&username='. urlencode($_POST['login']);
 290         if (isset($_GET['post'])) {
 291             $redir .= '&post=' . urlencode($_GET['post']);
 292             foreach (array('description', 'source', 'title', 'tags') as $param) {
 293                 if (!empty($_GET[$param])) {
 294                     $redir .= '&' . $param . '=' . urlencode($_GET[$param]);
 295                 }
 296             }
 297         }
 298         // Redirect to login screen.
 299         echo '<script>alert("'. t($errorReason) .'");document.location=\'?do=login'.$redir.'\';</script>';
 300         exit;
 301     }
 302 }
 303
 304 // ------------------------------------------------------------------------------------------
 305 // Token management for XSRF protection
 306 // Token should be used in any form which acts on data (create,update,delete,import...).
 307 if (!isset($_SESSION['tokens'])) $_SESSION['tokens']=array();  // Token are attached to the session.
 308
 309 /**
 310  * Daily RSS feed: 1 RSS entry per day giving all the links on that day.
 311  * Gives the last 7 days (which have links).
 312  * This RSS feed cannot be filtered.
 313  *
 314  * @param ConfigManager $conf         Configuration Manager instance
 315  * @param LoginManager  $loginManager LoginManager instance
 316  */
 317 function showDailyRSS($conf, $loginManager) {
 318     // Cache system
 319     $query = $_SERVER['QUERY_STRING'];
 320     $cache = new CachedPage(
 321         $conf->get('config.PAGE_CACHE'),
 322         page_url($_SERVER),
 323         startsWith($query,'do=dailyrss') && !$loginManager->isLoggedIn()
 324     );
 325     $cached = $cache->cachedVersion();
 326     if (!empty($cached)) {
 327         echo $cached;
 328         exit;
 329     }
 330
 331     // If cached was not found (or not usable), then read the database and build the response:
 332     // Read links from database (and filter private links if used it not logged in).
 333     $LINKSDB = new LinkDB(
 334         $conf->get('resource.datastore'),
 335         $loginManager->isLoggedIn(),
 336         $conf->get('privacy.hide_public_links'),
 337         $conf->get('redirector.url'),
 338         $conf->get('redirector.encode_url')
 339     );
 340
 341     /* Some Shaarlies may have very few links, so we need to look
 342        back in time until we have enough days ($nb_of_days).
 343     */
 344     $nb_of_days = 7; // We take 7 days.
 345     $today = date('Ymd');
 346     $days = array();
 347
 348     foreach ($LINKSDB as $link) {
 349         $day = $link['created']->format('Ymd'); // Extract day (without time)
 350         if (strcmp($day, $today) < 0) {
 351             if (empty($days[$day])) {
 352                 $days[$day] = array();
 353             }
 354             $days[$day][] = $link;
 355         }
 356
 357         if (count($days) > $nb_of_days) {
 358             break; // Have we collected enough days?
 359         }
 360     }
 361
 362     // Build the RSS feed.
 363     header('Content-Type: application/rss+xml; charset=utf-8');
 364     $pageaddr = escape(index_url($_SERVER));
 365     echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0">';
 366     echo '<channel>';
 367     echo '<title>Daily - '. $conf->get('general.title') . '</title>';
 368     echo '<link>'. $pageaddr .'</link>';
 369     echo '<description>Daily shared links</description>';
 370     echo '<language>en-en</language>';
 371     echo '<copyright>'. $pageaddr .'</copyright>'. PHP_EOL;
 372
 373     // For each day.
 374     foreach ($days as $day => $links) {
 375         $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 376         $absurl = escape(index_url($_SERVER).'?do=daily&day='.$day);  // Absolute URL of the corresponding "Daily" page.
 377
 378         // We pre-format some fields for proper output.
 379         foreach ($links as &$link) {
 380             $link['formatedDescription'] = format_description(
 381                 $link['description'],
 382                 $conf->get('redirector.url'),
 383                 $conf->get('redirector.encode_url')
 384             );
 385             $link['timestamp'] = $link['created']->getTimestamp();
 386             if (startsWith($link['url'], '?')) {
 387                 $link['url'] = index_url($_SERVER) . $link['url'];  // make permalink URL absolute
 388             }
 389         }
 390
 391         // Then build the HTML for this day:
 392         $tpl = new RainTPL;
 393         $tpl->assign('title', $conf->get('general.title'));
 394         $tpl->assign('daydate', $dayDate->getTimestamp());
 395         $tpl->assign('absurl', $absurl);
 396         $tpl->assign('links', $links);
 397         $tpl->assign('rssdate', escape($dayDate->format(DateTime::RSS)));
 398         $tpl->assign('hide_timestamps', $conf->get('privacy.hide_timestamps', false));
 399         $tpl->assign('index_url', $pageaddr);
 400         $html = $tpl->draw('dailyrss', true);
 401
 402         echo $html . PHP_EOL;
 403     }
 404     echo '</channel></rss><!-- Cached version of '. escape(page_url($_SERVER)) .' -->';
 405
 406     $cache->cache(ob_get_contents());
 407     ob_end_flush();
 408     exit;
 409 }
 410
 411 /**
 412  * Show the 'Daily' page.
 413  *
 414  * @param PageBuilder   $pageBuilder   Template engine wrapper.
 415  * @param LinkDB        $LINKSDB       LinkDB instance.
 416  * @param ConfigManager $conf          Configuration Manager instance.
 417  * @param PluginManager $pluginManager Plugin Manager instance.
 418  * @param LoginManager  $loginManager  Login Manager instance
 419  */
 420 function showDaily($pageBuilder, $LINKSDB, $conf, $pluginManager, $loginManager)
 421 {
 422     $day = date('Ymd', strtotime('-1 day')); // Yesterday, in format YYYYMMDD.
 423     if (isset($_GET['day'])) {
 424       $day = $_GET['day'];
 425     }
 426
 427     $days = $LINKSDB->days();
 428     $i = array_search($day, $days);
 429     if ($i === false && count($days)) {
 430         // no links for day, but at least one day with links
 431         $i = count($days) - 1;
 432         $day = $days[$i];
 433     }
 434     $previousday = '';
 435     $nextday = '';
 436
 437     if ($i !== false) {
 438         if ($i >= 1) {
 439              $previousday=$days[$i - 1];
 440         }
 441         if ($i < count($days) - 1) {
 442           $nextday = $days[$i + 1];
 443         }
 444     }
 445     try {
 446         $linksToDisplay = $LINKSDB->filterDay($day);
 447     } catch (Exception $exc) {
 448         error_log($exc);
 449         $linksToDisplay = array();
 450     }
 451
 452     // We pre-format some fields for proper output.
 453     foreach($linksToDisplay as $key => $link) {
 454         $taglist = explode(' ',$link['tags']);
 455         uasort($taglist, 'strcasecmp');
 456         $linksToDisplay[$key]['taglist']=$taglist;
 457         $linksToDisplay[$key]['formatedDescription'] = format_description(
 458             $link['description'],
 459             $conf->get('redirector.url'),
 460             $conf->get('redirector.encode_url')
 461         );
 462         $linksToDisplay[$key]['timestamp'] =  $link['created']->getTimestamp();
 463     }
 464
 465     $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 466     $data = array(
 467         'pagetitle' => $conf->get('general.title') .' - '. format_date($dayDate, false),
 468         'linksToDisplay' => $linksToDisplay,
 469         'day' => $dayDate->getTimestamp(),
 470         'dayDate' => $dayDate,
 471         'previousday' => $previousday,
 472         'nextday' => $nextday,
 473     );
 474
 475     /* Hook is called before column construction so that plugins don't have
 476        to deal with columns. */
 477     $pluginManager->executeHooks('render_daily', $data, array('loggedin' => $loginManager->isLoggedIn()));
 478
 479     /* We need to spread the articles on 3 columns.
 480        I did not want to use a JavaScript lib like http://masonry.desandro.com/
 481        so I manually spread entries with a simple method: I roughly evaluate the
 482        height of a div according to title and description length.
 483     */
 484     $columns = array(array(), array(), array()); // Entries to display, for each column.
 485     $fill = array(0, 0, 0);  // Rough estimate of columns fill.
 486     foreach($data['linksToDisplay'] as $key => $link) {
 487         // Roughly estimate length of entry (by counting characters)
 488         // Title: 30 chars = 1 line. 1 line is 30 pixels height.
 489         // Description: 836 characters gives roughly 342 pixel height.
 490         // This is not perfect, but it's usually OK.
 491         $length = strlen($link['title']) + (342 * strlen($link['description'])) / 836;
 492         if ($link['thumbnail']) {
 493           $length += 100; // 1 thumbnails roughly takes 100 pixels height.
 494         }
 495         // Then put in column which is the less filled:
 496         $smallest = min($fill); // find smallest value in array.
 497         $index = array_search($smallest, $fill); // find index of this smallest value.
 498         array_push($columns[$index], $link); // Put entry in this column.
 499         $fill[$index] += $length;
 500     }
 501
 502     $data['cols'] = $columns;
 503
 504     foreach ($data as $key => $value) {
 505         $pageBuilder->assign($key, $value);
 506     }
 507
 508     $pageBuilder->assign('pagetitle', t('Daily') .' - '. $conf->get('general.title', 'Shaarli'));
 509     $pageBuilder->renderPage('daily');
 510     exit;
 511 }
 512
 513 /**
 514  * Renders the linklist
 515  *
 516  * @param pageBuilder   $PAGE    pageBuilder instance.
 517  * @param LinkDB        $LINKSDB LinkDB instance.
 518  * @param ConfigManager $conf    Configuration Manager instance.
 519  * @param PluginManager $pluginManager Plugin Manager instance.
 520  */
 521 function showLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager) {
 522     buildLinkList($PAGE,$LINKSDB, $conf, $pluginManager, $loginManager);
 523     $PAGE->renderPage('linklist');
 524 }
 525
 526 /**
 527  * Render HTML page (according to URL parameters and user rights)
 528  *
 529  * @param ConfigManager  $conf           Configuration Manager instance.
 530  * @param PluginManager  $pluginManager  Plugin Manager instance,
 531  * @param LinkDB         $LINKSDB
 532  * @param History        $history        instance
 533  * @param SessionManager $sessionManager SessionManager instance
 534  * @param LoginManager   $loginManager   LoginManager instance
 535  */
 536 function renderPage($conf, $pluginManager, $LINKSDB, $history, $sessionManager, $loginManager)
 537 {
 538     $updater = new Updater(
 539         read_updates_file($conf->get('resource.updates')),
 540         $LINKSDB,
 541         $conf,
 542         $loginManager->isLoggedIn(),
 543         $_SESSION
 544     );
 545     try {
 546         $newUpdates = $updater->update();
 547         if (! empty($newUpdates)) {
 548             write_updates_file(
 549                 $conf->get('resource.updates'),
 550                 $updater->getDoneUpdates()
 551             );
 552         }
 553     }
 554     catch(Exception $e) {
 555         die($e->getMessage());
 556     }
 557
 558     $PAGE = new PageBuilder($conf, $_SESSION, $LINKSDB, $sessionManager->generateToken(), $loginManager->isLoggedIn());
 559     $PAGE->assign('linkcount', count($LINKSDB));
 560     $PAGE->assign('privateLinkcount', count_private($LINKSDB));
 561     $PAGE->assign('plugin_errors', $pluginManager->getErrors());
 562
 563     // Determine which page will be rendered.
 564     $query = (isset($_SERVER['QUERY_STRING'])) ? $_SERVER['QUERY_STRING'] : '';
 565     $targetPage = Router::findPage($query, $_GET, $loginManager->isLoggedIn());
 566
 567     if (
 568         // if the user isn't logged in
 569         !$loginManager->isLoggedIn() &&
 570         // and Shaarli doesn't have public content...
 571         $conf->get('privacy.hide_public_links') &&
 572         // and is configured to enforce the login
 573         $conf->get('privacy.force_login') &&
 574         // and the current page isn't already the login page
 575         $targetPage !== Router::$PAGE_LOGIN &&
 576         // and the user is not requesting a feed (which would lead to a different content-type as expected)
 577         $targetPage !== Router::$PAGE_FEED_ATOM &&
 578         $targetPage !== Router::$PAGE_FEED_RSS
 579     ) {
 580         // force current page to be the login page
 581         $targetPage = Router::$PAGE_LOGIN;
 582     }
 583
 584     // Call plugin hooks for header, footer and includes, specifying which page will be rendered.
 585     // Then assign generated data to RainTPL.
 586     $common_hooks = array(
 587         'includes',
 588         'header',
 589         'footer',
 590     );
 591
 592     foreach($common_hooks as $name) {
 593         $plugin_data = array();
 594         $pluginManager->executeHooks('render_' . $name, $plugin_data,
 595             array(
 596                 'target' => $targetPage,
 597                 'loggedin' => $loginManager->isLoggedIn()
 598             )
 599         );
 600         $PAGE->assign('plugins_' . $name, $plugin_data);
 601     }
 602
 603     // -------- Display login form.
 604     if ($targetPage == Router::$PAGE_LOGIN)
 605     {
 606         if ($conf->get('security.open_shaarli')) { header('Location: ?'); exit; }  // No need to login for open Shaarli
 607         if (isset($_GET['username'])) {
 608             $PAGE->assign('username', escape($_GET['username']));
 609         }
 610         $PAGE->assign('returnurl',(isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']):''));
 611         // add default state of the 'remember me' checkbox
 612         $PAGE->assign('remember_user_default', $conf->get('privacy.remember_user_default'));
 613         $PAGE->assign('user_can_login', $loginManager->canLogin($_SERVER));
 614         $PAGE->assign('pagetitle', t('Login') .' - '. $conf->get('general.title', 'Shaarli'));
 615         $PAGE->renderPage('loginform');
 616         exit;
 617     }
 618     // -------- User wants to logout.
 619     if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=logout'))
 620     {
 621         invalidateCaches($conf->get('resource.page_cache'));
 622         $sessionManager->logout();
 623         setcookie(LoginManager::$STAY_SIGNED_IN_COOKIE, 'false', 0, WEB_PATH);
 624         header('Location: ?');
 625         exit;
 626     }
 627
 628     // -------- Picture wall
 629     if ($targetPage == Router::$PAGE_PICWALL)
 630     {
 631         $PAGE->assign('pagetitle', t('Picture wall') .' - '. $conf->get('general.title', 'Shaarli'));
 632         if (! $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE) === Thumbnailer::MODE_NONE) {
 633             $PAGE->assign('linksToDisplay', []);
 634             $PAGE->renderPage('picwall');
 635             exit;
 636         }
 637
 638         // Optionally filter the results:
 639         $links = $LINKSDB->filterSearch($_GET);
 640         $linksToDisplay = array();
 641
 642         // Get only links which have a thumbnail.
 643         // Note: we do not retrieve thumbnails here, the request is too heavy.
 644         foreach($links as $key => $link)
 645         {
 646             if (isset($link['thumbnail']) && $link['thumbnail'] !== false) {
 647                 $linksToDisplay[] = $link; // Add to array.
 648             }
 649         }
 650
 651         $data = array(
 652             'linksToDisplay' => $linksToDisplay,
 653         );
 654         $pluginManager->executeHooks('render_picwall', $data, array('loggedin' => $loginManager->isLoggedIn()));
 655
 656         foreach ($data as $key => $value) {
 657             $PAGE->assign($key, $value);
 658         }
 659
 660
 661         $PAGE->renderPage('picwall');
 662         exit;
 663     }
 664
 665     // -------- Tag cloud
 666     if ($targetPage == Router::$PAGE_TAGCLOUD)
 667     {
 668         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
 669         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 670         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 671
 672         // We sort tags alphabetically, then choose a font size according to count.
 673         // First, find max value.
 674         $maxcount = 0;
 675         foreach ($tags as $value) {
 676             $maxcount = max($maxcount, $value);
 677         }
 678
 679         alphabetical_sort($tags, false, true);
 680
 681         $tagList = array();
 682         foreach($tags as $key => $value) {
 683             if (in_array($key, $filteringTags)) {
 684                 continue;
 685             }
 686             // Tag font size scaling:
 687             //   default 15 and 30 logarithm bases affect scaling,
 688             //   22 and 6 are arbitrary font sizes for max and min sizes.
 689             $size = log($value, 15) / log($maxcount, 30) * 2.2 + 0.8;
 690             $tagList[$key] = array(
 691                 'count' => $value,
 692                 'size' => number_format($size, 2, '.', ''),
 693             );
 694         }
 695
 696         $searchTags = implode(' ', escape($filteringTags));
 697         $data = array(
 698             'search_tags' => $searchTags,
 699             'tags' => $tagList,
 700         );
 701         $pluginManager->executeHooks('render_tagcloud', $data, array('loggedin' => $loginManager->isLoggedIn()));
 702
 703         foreach ($data as $key => $value) {
 704             $PAGE->assign($key, $value);
 705         }
 706
 707         $searchTags = ! empty($searchTags) ? $searchTags .' - ' : '';
 708         $PAGE->assign('pagetitle', $searchTags. t('Tag cloud') .' - '. $conf->get('general.title', 'Shaarli'));
 709         $PAGE->renderPage('tag.cloud');
 710         exit;
 711     }
 712
 713     // -------- Tag list
 714     if ($targetPage == Router::$PAGE_TAGLIST)
 715     {
 716         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
 717         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 718         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 719         foreach ($filteringTags as $tag) {
 720             if (array_key_exists($tag, $tags)) {
 721                 unset($tags[$tag]);
 722             }
 723         }
 724
 725         if (! empty($_GET['sort']) && $_GET['sort'] === 'alpha') {
 726             alphabetical_sort($tags, false, true);
 727         }
 728
 729         $searchTags = implode(' ', escape($filteringTags));
 730         $data = [
 731             'search_tags' => $searchTags,
 732             'tags' => $tags,
 733         ];
 734         $pluginManager->executeHooks('render_taglist', $data, ['loggedin' => $loginManager->isLoggedIn()]);
 735
 736         foreach ($data as $key => $value) {
 737             $PAGE->assign($key, $value);
 738         }
 739
 740         $searchTags = ! empty($searchTags) ? $searchTags .' - ' : '';
 741         $PAGE->assign('pagetitle', $searchTags . t('Tag list') .' - '. $conf->get('general.title', 'Shaarli'));
 742         $PAGE->renderPage('tag.list');
 743         exit;
 744     }
 745
 746     // Daily page.
 747     if ($targetPage == Router::$PAGE_DAILY) {
 748         showDaily($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
 749     }
 750
 751     // ATOM and RSS feed.
 752     if ($targetPage == Router::$PAGE_FEED_ATOM || $targetPage == Router::$PAGE_FEED_RSS) {
 753         $feedType = $targetPage == Router::$PAGE_FEED_RSS ? FeedBuilder::$FEED_RSS : FeedBuilder::$FEED_ATOM;
 754         header('Content-Type: application/'. $feedType .'+xml; charset=utf-8');
 755
 756         // Cache system
 757         $query = $_SERVER['QUERY_STRING'];
 758         $cache = new CachedPage(
 759             $conf->get('resource.page_cache'),
 760             page_url($_SERVER),
 761             startsWith($query,'do='. $targetPage) && !$loginManager->isLoggedIn()
 762         );
 763         $cached = $cache->cachedVersion();
 764         if (!empty($cached)) {
 765             echo $cached;
 766             exit;
 767         }
 768
 769         // Generate data.
 770         $feedGenerator = new FeedBuilder($LINKSDB, $feedType, $_SERVER, $_GET, $loginManager->isLoggedIn());
 771         $feedGenerator->setLocale(strtolower(setlocale(LC_COLLATE, 0)));
 772         $feedGenerator->setHideDates($conf->get('privacy.hide_timestamps') && !$loginManager->isLoggedIn());
 773         $feedGenerator->setUsePermalinks(isset($_GET['permalinks']) || !$conf->get('feed.rss_permalinks'));
 774         $data = $feedGenerator->buildData();
 775
 776         // Process plugin hook.
 777         $pluginManager->executeHooks('render_feed', $data, array(
 778             'loggedin' => $loginManager->isLoggedIn(),
 779             'target' => $targetPage,
 780         ));
 781
 782         // Render the template.
 783         $PAGE->assignAll($data);
 784         $PAGE->renderPage('feed.'. $feedType);
 785         $cache->cache(ob_get_contents());
 786         ob_end_flush();
 787         exit;
 788     }
 789
 790     // Display opensearch plugin (XML)
 791     if ($targetPage == Router::$PAGE_OPENSEARCH) {
 792         header('Content-Type: application/xml; charset=utf-8');
 793         $PAGE->assign('serverurl', index_url($_SERVER));
 794         $PAGE->renderPage('opensearch');
 795         exit;
 796     }
 797
 798     // -------- User clicks on a tag in a link: The tag is added to the list of searched tags (searchtags=...)
 799     if (isset($_GET['addtag']))
 800     {
 801         // Get previous URL (http_referer) and add the tag to the searchtags parameters in query.
 802         if (empty($_SERVER['HTTP_REFERER'])) { header('Location: ?searchtags='.urlencode($_GET['addtag'])); exit; } // In case browser does not send HTTP_REFERER
 803         parse_str(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_QUERY), $params);
 804
 805         // Prevent redirection loop
 806         if (isset($params['addtag'])) {
 807             unset($params['addtag']);
 808         }
 809
 810         // Check if this tag is already in the search query and ignore it if it is.
 811         // Each tag is always separated by a space
 812         if (isset($params['searchtags'])) {
 813             $current_tags = explode(' ', $params['searchtags']);
 814         } else {
 815             $current_tags = array();
 816         }
 817         $addtag = true;
 818         foreach ($current_tags as $value) {
 819             if ($value === $_GET['addtag']) {
 820                 $addtag = false;
 821                 break;
 822             }
 823         }
 824         // Append the tag if necessary
 825         if (empty($params['searchtags'])) {
 826             $params['searchtags'] = trim($_GET['addtag']);
 827         }
 828         elseif ($addtag) {
 829             $params['searchtags'] = trim($params['searchtags']).' '.trim($_GET['addtag']);
 830         }
 831
 832         unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
 833         header('Location: ?'.http_build_query($params));
 834         exit;
 835     }
 836
 837     // -------- User clicks on a tag in result count: Remove the tag from the list of searched tags (searchtags=...)
 838     if (isset($_GET['removetag'])) {
 839         // Get previous URL (http_referer) and remove the tag from the searchtags parameters in query.
 840         if (empty($_SERVER['HTTP_REFERER'])) {
 841             header('Location: ?');
 842             exit;
 843         }
 844
 845         // In case browser does not send HTTP_REFERER
 846         parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $params);
 847
 848         // Prevent redirection loop
 849         if (isset($params['removetag'])) {
 850             unset($params['removetag']);
 851         }
 852
 853         if (isset($params['searchtags'])) {
 854             $tags = explode(' ', $params['searchtags']);
 855             // Remove value from array $tags.
 856             $tags = array_diff($tags, array($_GET['removetag']));
 857             $params['searchtags'] = implode(' ',$tags);
 858
 859             if (empty($params['searchtags'])) {
 860                 unset($params['searchtags']);
 861             }
 862
 863             unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
 864         }
 865         header('Location: ?'.http_build_query($params));
 866         exit;
 867     }
 868
 869     // -------- User wants to change the number of links per page (linksperpage=...)
 870     if (isset($_GET['linksperpage'])) {
 871         if (is_numeric($_GET['linksperpage'])) {
 872             $_SESSION['LINKS_PER_PAGE']=abs(intval($_GET['linksperpage']));
 873         }
 874
 875         if (! empty($_SERVER['HTTP_REFERER'])) {
 876             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('linksperpage'));
 877         } else {
 878             $location = '?';
 879         }
 880         header('Location: '. $location);
 881         exit;
 882     }
 883
 884     // -------- User wants to see only private links (toggle)
 885     if (isset($_GET['visibility'])) {
 886         if ($_GET['visibility'] === 'private') {
 887             // Visibility not set or not already private, set private, otherwise reset it
 888             if (empty($_SESSION['visibility']) || $_SESSION['visibility'] !== 'private') {
 889                 // See only private links
 890                 $_SESSION['visibility'] = 'private';
 891             } else {
 892                 unset($_SESSION['visibility']);
 893             }
 894         } elseif ($_GET['visibility'] === 'public') {
 895             if (empty($_SESSION['visibility']) || $_SESSION['visibility'] !== 'public') {
 896                 // See only public links
 897                 $_SESSION['visibility'] = 'public';
 898             } else {
 899                 unset($_SESSION['visibility']);
 900             }
 901         }
 902
 903         if (! empty($_SERVER['HTTP_REFERER'])) {
 904             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('visibility'));
 905         } else {
 906             $location = '?';
 907         }
 908         header('Location: '. $location);
 909         exit;
 910     }
 911
 912     // -------- User wants to see only untagged links (toggle)
 913     if (isset($_GET['untaggedonly'])) {
 914         $_SESSION['untaggedonly'] = empty($_SESSION['untaggedonly']);
 915
 916         if (! empty($_SERVER['HTTP_REFERER'])) {
 917             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('untaggedonly'));
 918         } else {
 919             $location = '?';
 920         }
 921         header('Location: '. $location);
 922         exit;
 923     }
 924
 925     // -------- Handle other actions allowed for non-logged in users:
 926     if (!$loginManager->isLoggedIn())
 927     {
 928         // User tries to post new link but is not logged in:
 929         // Show login screen, then redirect to ?post=...
 930         if (isset($_GET['post']))
 931         {
 932             header( // Redirect to login page, then back to post link.
 933                 'Location: ?do=login&post='.urlencode($_GET['post']).
 934                 (!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').
 935                 (!empty($_GET['description'])?'&description='.urlencode($_GET['description']):'').
 936                 (!empty($_GET['tags'])?'&tags='.urlencode($_GET['tags']):'').
 937                 (!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')
 938             );
 939             exit;
 940         }
 941
 942         showLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
 943         if (isset($_GET['edit_link'])) {
 944             header('Location: ?do=login&edit_link='. escape($_GET['edit_link']));
 945             exit;
 946         }
 947
 948         exit; // Never remove this one! All operations below are reserved for logged in user.
 949     }
 950
 951     // -------- All other functions are reserved for the registered user:
 952
 953     // -------- Display the Tools menu if requested (import/export/bookmarklet...)
 954     if ($targetPage == Router::$PAGE_TOOLS)
 955     {
 956         $data = [
 957             'pageabsaddr' => index_url($_SERVER),
 958             'sslenabled' => is_https($_SERVER),
 959         ];
 960         $pluginManager->executeHooks('render_tools', $data);
 961
 962         foreach ($data as $key => $value) {
 963             $PAGE->assign($key, $value);
 964         }
 965
 966         $PAGE->assign('pagetitle', t('Tools') .' - '. $conf->get('general.title', 'Shaarli'));
 967         $PAGE->renderPage('tools');
 968         exit;
 969     }
 970
 971     // -------- User wants to change his/her password.
 972     if ($targetPage == Router::$PAGE_CHANGEPASSWORD)
 973     {
 974         if ($conf->get('security.open_shaarli')) {
 975             die(t('You are not supposed to change a password on an Open Shaarli.'));
 976         }
 977
 978         if (!empty($_POST['setpassword']) && !empty($_POST['oldpassword']))
 979         {
 980             if (!$sessionManager->checkToken($_POST['token'])) die(t('Wrong token.')); // Go away!
 981
 982             // Make sure old password is correct.
 983             $oldhash = sha1($_POST['oldpassword'].$conf->get('credentials.login').$conf->get('credentials.salt'));
 984             if ($oldhash!= $conf->get('credentials.hash')) {
 985                 echo '<script>alert("'. t('The old password is not correct.') .'");document.location=\'?do=changepasswd\';</script>';
 986                 exit;
 987             }
 988             // Save new password
 989             // Salt renders rainbow-tables attacks useless.
 990             $conf->set('credentials.salt', sha1(uniqid('', true) .'_'. mt_rand()));
 991             $conf->set('credentials.hash', sha1($_POST['setpassword'] . $conf->get('credentials.login') . $conf->get('credentials.salt')));
 992             try {
 993                 $conf->write($loginManager->isLoggedIn());
 994             }
 995             catch(Exception $e) {
 996                 error_log(
 997                     'ERROR while writing config file after changing password.' . PHP_EOL .
 998                     $e->getMessage()
 999                 );
1000
1001                 // TODO: do not handle exceptions/errors in JS.
1002                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=tools\';</script>';
1003                 exit;
1004             }
1005             echo '<script>alert("'. t('Your password has been changed') .'");document.location=\'?do=tools\';</script>';
1006             exit;
1007         }
1008         else // show the change password form.
1009         {
1010             $PAGE->assign('pagetitle', t('Change password') .' - '. $conf->get('general.title', 'Shaarli'));
1011             $PAGE->renderPage('changepassword');
1012             exit;
1013         }
1014     }
1015
1016     // -------- User wants to change configuration
1017     if ($targetPage == Router::$PAGE_CONFIGURE)
1018     {
1019         if (!empty($_POST['title']) )
1020         {
1021             if (!$sessionManager->checkToken($_POST['token'])) {
1022                 die(t('Wrong token.')); // Go away!
1023             }
1024             $tz = 'UTC';
1025             if (!empty($_POST['continent']) && !empty($_POST['city'])
1026                 && isTimeZoneValid($_POST['continent'], $_POST['city'])
1027             ) {
1028                 $tz = $_POST['continent'] . '/' . $_POST['city'];
1029             }
1030             $conf->set('general.timezone', $tz);
1031             $conf->set('general.title', escape($_POST['title']));
1032             $conf->set('general.header_link', escape($_POST['titleLink']));
1033             $conf->set('resource.theme', escape($_POST['theme']));
1034             $conf->set('security.session_protection_disabled', !empty($_POST['disablesessionprotection']));
1035             $conf->set('privacy.default_private_links', !empty($_POST['privateLinkByDefault']));
1036             $conf->set('feed.rss_permalinks', !empty($_POST['enableRssPermalinks']));
1037             $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1038             $conf->set('privacy.hide_public_links', !empty($_POST['hidePublicLinks']));
1039             $conf->set('api.enabled', !empty($_POST['enableApi']));
1040             $conf->set('api.secret', escape($_POST['apiSecret']));
1041             $conf->set('translation.language', escape($_POST['language']));
1042
1043             $thumbnailsMode = extension_loaded('gd') ? $_POST['enableThumbnails'] : Thumbnailer::MODE_NONE;
1044             if ($thumbnailsMode !== Thumbnailer::MODE_NONE
1045                 && $thumbnailsMode !== $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE)
1046             ) {
1047                 $_SESSION['warnings'][] = t(
1048                     'You have enabled or changed thumbnails mode. <a href="?do=thumbs_update">Please synchronize them</a>.'
1049                 );
1050             }
1051             $conf->set('thumbnails.mode', $thumbnailsMode);
1052
1053             try {
1054                 $conf->write($loginManager->isLoggedIn());
1055                 $history->updateSettings();
1056                 invalidateCaches($conf->get('resource.page_cache'));
1057             }
1058             catch(Exception $e) {
1059                 error_log(
1060                     'ERROR while writing config file after configuration update.' . PHP_EOL .
1061                     $e->getMessage()
1062                 );
1063
1064                 // TODO: do not handle exceptions/errors in JS.
1065                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=configure\';</script>';
1066                 exit;
1067             }
1068             echo '<script>alert("'. t('Configuration was saved.') .'");document.location=\'?do=configure\';</script>';
1069             exit;
1070         }
1071         else // Show the configuration form.
1072         {
1073             $PAGE->assign('title', $conf->get('general.title'));
1074             $PAGE->assign('theme', $conf->get('resource.theme'));
1075             $PAGE->assign('theme_available', ThemeUtils::getThemes($conf->get('resource.raintpl_tpl')));
1076             list($continents, $cities) = generateTimeZoneData(
1077                 timezone_identifiers_list(),
1078                 $conf->get('general.timezone')
1079             );
1080             $PAGE->assign('continents', $continents);
1081             $PAGE->assign('cities', $cities);
1082             $PAGE->assign('private_links_default', $conf->get('privacy.default_private_links', false));
1083             $PAGE->assign('session_protection_disabled', $conf->get('security.session_protection_disabled', false));
1084             $PAGE->assign('enable_rss_permalinks', $conf->get('feed.rss_permalinks', false));
1085             $PAGE->assign('enable_update_check', $conf->get('updates.check_updates', true));
1086             $PAGE->assign('hide_public_links', $conf->get('privacy.hide_public_links', false));
1087             $PAGE->assign('api_enabled', $conf->get('api.enabled', true));
1088             $PAGE->assign('api_secret', $conf->get('api.secret'));
1089             $PAGE->assign('languages', Languages::getAvailableLanguages());
1090             $PAGE->assign('language', $conf->get('translation.language'));
1091             $PAGE->assign('gd_enabled', extension_loaded('gd'));
1092             $PAGE->assign('thumbnails_mode', $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE));
1093             $PAGE->assign('pagetitle', t('Configure') .' - '. $conf->get('general.title', 'Shaarli'));
1094             $PAGE->renderPage('configure');
1095             exit;
1096         }
1097     }
1098
1099     // -------- User wants to rename a tag or delete it
1100     if ($targetPage == Router::$PAGE_CHANGETAG)
1101     {
1102         if (empty($_POST['fromtag']) || (empty($_POST['totag']) && isset($_POST['renametag']))) {
1103             $PAGE->assign('fromtag', ! empty($_GET['fromtag']) ? escape($_GET['fromtag']) : '');
1104             $PAGE->assign('pagetitle', t('Manage tags') .' - '. $conf->get('general.title', 'Shaarli'));
1105             $PAGE->renderPage('changetag');
1106             exit;
1107         }
1108
1109         if (!$sessionManager->checkToken($_POST['token'])) {
1110             die(t('Wrong token.'));
1111         }
1112
1113         $alteredLinks = $LINKSDB->renameTag(escape($_POST['fromtag']), escape($_POST['totag']));
1114         $LINKSDB->save($conf->get('resource.page_cache'));
1115         foreach ($alteredLinks as $link) {
1116             $history->updateLink($link);
1117         }
1118         $delete = empty($_POST['totag']);
1119         $redirect = $delete ? 'do=changetag' : 'searchtags='. urlencode(escape($_POST['totag']));
1120         $count = count($alteredLinks);
1121         $alert = $delete
1122             ? sprintf(t('The tag was removed from %d link.', 'The tag was removed from %d links.', $count), $count)
1123             : sprintf(t('The tag was renamed in %d link.', 'The tag was renamed in %d links.', $count), $count);
1124         echo '<script>alert("'. $alert .'");document.location=\'?'. $redirect .'\';</script>';
1125         exit;
1126     }
1127
1128     // -------- User wants to add a link without using the bookmarklet: Show form.
1129     if ($targetPage == Router::$PAGE_ADDLINK)
1130     {
1131         $PAGE->assign('pagetitle', t('Shaare a new link') .' - '. $conf->get('general.title', 'Shaarli'));
1132         $PAGE->renderPage('addlink');
1133         exit;
1134     }
1135
1136     // -------- User clicked the "Save" button when editing a link: Save link to database.
1137     if (isset($_POST['save_edit']))
1138     {
1139         // Go away!
1140         if (! $sessionManager->checkToken($_POST['token'])) {
1141             die(t('Wrong token.'));
1142         }
1143
1144         // lf_id should only be present if the link exists.
1145         $id = isset($_POST['lf_id']) ? intval(escape($_POST['lf_id'])) : $LINKSDB->getNextId();
1146         // Linkdate is kept here to:
1147         //   - use the same permalink for notes as they're displayed when creating them
1148         //   - let users hack creation date of their posts
1149         //     See: https://shaarli.readthedocs.io/en/master/guides/various-hacks/#changing-the-timestamp-for-a-shaare
1150         $linkdate = escape($_POST['lf_linkdate']);
1151         if (isset($LINKSDB[$id])) {
1152             // Edit
1153             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1154             $updated = new DateTime();
1155             $shortUrl = $LINKSDB[$id]['shorturl'];
1156             $new = false;
1157         } else {
1158             // New link
1159             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1160             $updated = null;
1161             $shortUrl = link_small_hash($created, $id);
1162             $new = true;
1163         }
1164
1165         // Remove multiple spaces.
1166         $tags = trim(preg_replace('/\s\s+/', ' ', $_POST['lf_tags']));
1167         // Remove first '-' char in tags.
1168         $tags = preg_replace('/(^| )\-/', '$1', $tags);
1169         // Remove duplicates.
1170         $tags = implode(' ', array_unique(explode(' ', $tags)));
1171
1172         if (empty(trim($_POST['lf_url']))) {
1173             $_POST['lf_url'] = '?' . smallHash($linkdate . $id);
1174         }
1175         $url = whitelist_protocols(trim($_POST['lf_url']), $conf->get('security.allowed_protocols'));
1176
1177         $link = array(
1178             'id' => $id,
1179             'title' => trim($_POST['lf_title']),
1180             'url' => $url,
1181             'description' => $_POST['lf_description'],
1182             'private' => (isset($_POST['lf_private']) ? 1 : 0),
1183             'created' => $created,
1184             'updated' => $updated,
1185             'tags' => str_replace(',', ' ', $tags),
1186             'shorturl' => $shortUrl,
1187         );
1188
1189         // If title is empty, use the URL as title.
1190         if ($link['title'] == '') {
1191             $link['title'] = $link['url'];
1192         }
1193
1194         if ($conf->get('thumbnails.mode', Thumbnailer::MODE_NONE) !== Thumbnailer::MODE_NONE) {
1195             $thumbnailer = new Thumbnailer($conf);
1196             $link['thumbnail'] = $thumbnailer->get($url);
1197         }
1198
1199         $pluginManager->executeHooks('save_link', $link);
1200
1201         $LINKSDB[$id] = $link;
1202         $LINKSDB->save($conf->get('resource.page_cache'));
1203         if ($new) {
1204             $history->addLink($link);
1205         } else {
1206             $history->updateLink($link);
1207         }
1208
1209         // If we are called from the bookmarklet, we must close the popup:
1210         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1211             echo '<script>self.close();</script>';
1212             exit;
1213         }
1214
1215         $returnurl = !empty($_POST['returnurl']) ? $_POST['returnurl'] : '?';
1216         $location = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1217         // Scroll to the link which has been edited.
1218         $location .= '#' . $link['shorturl'];
1219         // After saving the link, redirect to the page the user was on.
1220         header('Location: '. $location);
1221         exit;
1222     }
1223
1224     // -------- User clicked the "Cancel" button when editing a link.
1225     if (isset($_POST['cancel_edit']))
1226     {
1227         $id = isset($_POST['lf_id']) ? (int) escape($_POST['lf_id']) : false;
1228         if (! isset($LINKSDB[$id])) {
1229             header('Location: ?');
1230         }
1231         // If we are called from the bookmarklet, we must close the popup:
1232         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1233         $link = $LINKSDB[$id];
1234         $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
1235         // Scroll to the link which has been edited.
1236         $returnurl .= '#'. $link['shorturl'];
1237         $returnurl = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1238         header('Location: '.$returnurl); // After canceling, redirect to the page the user was on.
1239         exit;
1240     }
1241
1242     // -------- User clicked the "Delete" button when editing a link: Delete link from database.
1243     if ($targetPage == Router::$PAGE_DELETELINK)
1244     {
1245         if (! $sessionManager->checkToken($_GET['token'])) {
1246             die(t('Wrong token.'));
1247         }
1248
1249         $ids = trim($_GET['lf_linkdate']);
1250         if (strpos($ids, ' ') !== false) {
1251             // multiple, space-separated ids provided
1252             $ids = array_values(array_filter(preg_split('/\s+/', escape($ids))));
1253         } else {
1254             // only a single id provided
1255             $ids = [$ids];
1256         }
1257         // assert at least one id is given
1258         if(!count($ids)){
1259             die('no id provided');
1260         }
1261         foreach ($ids as $id) {
1262             $id = (int) escape($id);
1263             $link = $LINKSDB[$id];
1264             $pluginManager->executeHooks('delete_link', $link);
1265             unset($LINKSDB[$id]);
1266         }
1267         $LINKSDB->save($conf->get('resource.page_cache')); // save to disk
1268         $history->deleteLink($link);
1269
1270         // If we are called from the bookmarklet, we must close the popup:
1271         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1272
1273         $location = '?';
1274         if (isset($_SERVER['HTTP_REFERER'])) {
1275             // Don't redirect to where we were previously if it was a permalink or an edit_link, because it would 404.
1276             $location = generateLocation(
1277                     $_SERVER['HTTP_REFERER'],
1278                     $_SERVER['HTTP_HOST'],
1279                     ['delete_link', 'edit_link', $link['shorturl']]
1280             );
1281         }
1282
1283         header('Location: ' . $location); // After deleting the link, redirect to appropriate location
1284         exit;
1285     }
1286
1287     // -------- User clicked the "EDIT" button on a link: Display link edit form.
1288     if (isset($_GET['edit_link']))
1289     {
1290         $id = (int) escape($_GET['edit_link']);
1291         $link = $LINKSDB[$id];  // Read database
1292         if (!$link) { header('Location: ?'); exit; } // Link not found in database.
1293         $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1294         $data = array(
1295             'link' => $link,
1296             'link_is_new' => false,
1297             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1298             'tags' => $LINKSDB->linksCountPerTag(),
1299         );
1300         $pluginManager->executeHooks('render_editlink', $data);
1301
1302         foreach ($data as $key => $value) {
1303             $PAGE->assign($key, $value);
1304         }
1305
1306         $PAGE->assign('pagetitle', t('Edit') .' '. t('Shaare') .' - '. $conf->get('general.title', 'Shaarli'));
1307         $PAGE->renderPage('editlink');
1308         exit;
1309     }
1310
1311     // -------- User want to post a new link: Display link edit form.
1312     if (isset($_GET['post'])) {
1313         $url = cleanup_url($_GET['post']);
1314
1315         $link_is_new = false;
1316         // Check if URL is not already in database (in this case, we will edit the existing link)
1317         $link = $LINKSDB->getLinkFromUrl($url);
1318         if (! $link)
1319         {
1320             $link_is_new = true;
1321             $linkdate = strval(date(LinkDB::LINK_DATE_FORMAT));
1322             // Get title if it was provided in URL (by the bookmarklet).
1323             $title = empty($_GET['title']) ? '' : escape($_GET['title']);
1324             // Get description if it was provided in URL (by the bookmarklet). [Bronco added that]
1325             $description = empty($_GET['description']) ? '' : escape($_GET['description']);
1326             $tags = empty($_GET['tags']) ? '' : escape($_GET['tags']);
1327             $private = !empty($_GET['private']) && $_GET['private'] === "1" ? 1 : 0;
1328             // If this is an HTTP(S) link, we try go get the page to extract the title (otherwise we will to straight to the edit form.)
1329             if (empty($title) && strpos(get_url_scheme($url), 'http') !== false) {
1330                 // Short timeout to keep the application responsive
1331                 // The callback will fill $charset and $title with data from the downloaded page.
1332                 get_http_response(
1333                     $url,
1334                     $conf->get('general.download_timeout', 30),
1335                     $conf->get('general.download_max_size', 4194304),
1336                     get_curl_download_callback($charset, $title)
1337                 );
1338                 if (! empty($title) && strtolower($charset) != 'utf-8') {
1339                     $title = mb_convert_encoding($title, 'utf-8', $charset);
1340                 }
1341             }
1342
1343             if ($url == '') {
1344                 $url = '?' . smallHash($linkdate . $LINKSDB->getNextId());
1345                 $title = $conf->get('general.default_note_title', t('Note: '));
1346             }
1347             $url = escape($url);
1348             $title = escape($title);
1349
1350             $link = array(
1351                 'linkdate' => $linkdate,
1352                 'title' => $title,
1353                 'url' => $url,
1354                 'description' => $description,
1355                 'tags' => $tags,
1356                 'private' => $private,
1357             );
1358         } else {
1359             $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1360         }
1361
1362         $data = array(
1363             'link' => $link,
1364             'link_is_new' => $link_is_new,
1365             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1366             'source' => (isset($_GET['source']) ? $_GET['source'] : ''),
1367             'tags' => $LINKSDB->linksCountPerTag(),
1368             'default_private_links' => $conf->get('privacy.default_private_links', false),
1369         );
1370         $pluginManager->executeHooks('render_editlink', $data);
1371
1372         foreach ($data as $key => $value) {
1373             $PAGE->assign($key, $value);
1374         }
1375
1376         $PAGE->assign('pagetitle', t('Shaare') .' - '. $conf->get('general.title', 'Shaarli'));
1377         $PAGE->renderPage('editlink');
1378         exit;
1379     }
1380
1381     if ($targetPage == Router::$PAGE_EXPORT) {
1382         // Export links as a Netscape Bookmarks file
1383
1384         if (empty($_GET['selection'])) {
1385             $PAGE->assign('pagetitle', t('Export') .' - '. $conf->get('general.title', 'Shaarli'));
1386             $PAGE->renderPage('export');
1387             exit;
1388         }
1389
1390         // export as bookmarks_(all|private|public)_YYYYmmdd_HHMMSS.html
1391         $selection = $_GET['selection'];
1392         if (isset($_GET['prepend_note_url'])) {
1393             $prependNoteUrl = $_GET['prepend_note_url'];
1394         } else {
1395             $prependNoteUrl = false;
1396         }
1397
1398         try {
1399             $PAGE->assign(
1400                 'links',
1401                 NetscapeBookmarkUtils::filterAndFormat(
1402                     $LINKSDB,
1403                     $selection,
1404                     $prependNoteUrl,
1405                     index_url($_SERVER)
1406                 )
1407             );
1408         } catch (Exception $exc) {
1409             header('Content-Type: text/plain; charset=utf-8');
1410             echo $exc->getMessage();
1411             exit;
1412         }
1413         $now = new DateTime();
1414         header('Content-Type: text/html; charset=utf-8');
1415         header(
1416             'Content-disposition: attachment; filename=bookmarks_'
1417            .$selection.'_'.$now->format(LinkDB::LINK_DATE_FORMAT).'.html'
1418         );
1419         $PAGE->assign('date', $now->format(DateTime::RFC822));
1420         $PAGE->assign('eol', PHP_EOL);
1421         $PAGE->assign('selection', $selection);
1422         $PAGE->renderPage('export.bookmarks');
1423         exit;
1424     }
1425
1426     if ($targetPage == Router::$PAGE_IMPORT) {
1427         // Upload a Netscape bookmark dump to import its contents
1428
1429         if (! isset($_POST['token']) || ! isset($_FILES['filetoupload'])) {
1430             // Show import dialog
1431             $PAGE->assign(
1432                 'maxfilesize',
1433                 get_max_upload_size(
1434                     ini_get('post_max_size'),
1435                     ini_get('upload_max_filesize'),
1436                     false
1437                 )
1438             );
1439             $PAGE->assign(
1440                 'maxfilesizeHuman',
1441                 get_max_upload_size(
1442                     ini_get('post_max_size'),
1443                     ini_get('upload_max_filesize'),
1444                     true
1445                 )
1446             );
1447             $PAGE->assign('pagetitle', t('Import') .' - '. $conf->get('general.title', 'Shaarli'));
1448             $PAGE->renderPage('import');
1449             exit;
1450         }
1451
1452         // Import bookmarks from an uploaded file
1453         if (isset($_FILES['filetoupload']['size']) && $_FILES['filetoupload']['size'] == 0) {
1454             // The file is too big or some form field may be missing.
1455             $msg = sprintf(
1456                 t(
1457                     'The file you are trying to upload is probably bigger than what this webserver can accept'
1458                     .' (%s). Please upload in smaller chunks.'
1459                 ),
1460                 get_max_upload_size(ini_get('post_max_size'), ini_get('upload_max_filesize'))
1461             );
1462             echo '<script>alert("'. $msg .'");document.location=\'?do='.Router::$PAGE_IMPORT .'\';</script>';
1463             exit;
1464         }
1465         if (! $sessionManager->checkToken($_POST['token'])) {
1466             die('Wrong token.');
1467         }
1468         $status = NetscapeBookmarkUtils::import(
1469             $_POST,
1470             $_FILES,
1471             $LINKSDB,
1472             $conf,
1473             $history
1474         );
1475         echo '<script>alert("'.$status.'");document.location=\'?do='
1476              .Router::$PAGE_IMPORT .'\';</script>';
1477         exit;
1478     }
1479
1480     // Plugin administration page
1481     if ($targetPage == Router::$PAGE_PLUGINSADMIN) {
1482         $pluginMeta = $pluginManager->getPluginsMeta();
1483
1484         // Split plugins into 2 arrays: ordered enabled plugins and disabled.
1485         $enabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] !== false; });
1486         // Load parameters.
1487         $enabledPlugins = load_plugin_parameter_values($enabledPlugins, $conf->get('plugins', array()));
1488         uasort(
1489             $enabledPlugins,
1490             function($a, $b) { return $a['order'] - $b['order']; }
1491         );
1492         $disabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] === false; });
1493
1494         $PAGE->assign('enabledPlugins', $enabledPlugins);
1495         $PAGE->assign('disabledPlugins', $disabledPlugins);
1496         $PAGE->assign('pagetitle', t('Plugin administration') .' - '. $conf->get('general.title', 'Shaarli'));
1497         $PAGE->renderPage('pluginsadmin');
1498         exit;
1499     }
1500
1501     // Plugin administration form action
1502     if ($targetPage == Router::$PAGE_SAVE_PLUGINSADMIN) {
1503         try {
1504             if (isset($_POST['parameters_form'])) {
1505                 unset($_POST['parameters_form']);
1506                 foreach ($_POST as $param => $value) {
1507                     $conf->set('plugins.'. $param, escape($value));
1508                 }
1509             }
1510             else {
1511                 $conf->set('general.enabled_plugins', save_plugin_config($_POST));
1512             }
1513             $conf->write($loginManager->isLoggedIn());
1514             $history->updateSettings();
1515         }
1516         catch (Exception $e) {
1517             error_log(
1518                 'ERROR while saving plugin configuration:.' . PHP_EOL .
1519                 $e->getMessage()
1520             );
1521
1522             // TODO: do not handle exceptions/errors in JS.
1523             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do='. Router::$PAGE_PLUGINSADMIN .'\';</script>';
1524             exit;
1525         }
1526         header('Location: ?do='. Router::$PAGE_PLUGINSADMIN);
1527         exit;
1528     }
1529
1530     // Get a fresh token
1531     if ($targetPage == Router::$GET_TOKEN) {
1532         header('Content-Type:text/plain');
1533         echo $sessionManager->generateToken($conf);
1534         exit;
1535     }
1536
1537     // -------- Thumbnails Update
1538     if ($targetPage == Router::$PAGE_THUMBS_UPDATE) {
1539         $ids = [];
1540         foreach ($LINKSDB as $link) {
1541             // A note or not HTTP(S)
1542             if ($link['url'][0] === '?' || ! startsWith(strtolower($link['url']), 'http')) {
1543                 continue;
1544             }
1545             $ids[] = $link['id'];
1546         }
1547         $PAGE->assign('ids', $ids);
1548         $PAGE->assign('pagetitle', t('Thumbnails update') .' - '. $conf->get('general.title', 'Shaarli'));
1549         $PAGE->renderPage('thumbnails');
1550         exit;
1551     }
1552
1553     // -------- Single Thumbnail Update
1554     if ($targetPage == Router::$AJAX_THUMB_UPDATE) {
1555         if (! isset($_POST['id']) || ! ctype_digit($_POST['id'])) {
1556             http_response_code(400);
1557             exit;
1558         }
1559         $id = (int) $_POST['id'];
1560         if (empty($LINKSDB[$id])) {
1561             http_response_code(404);
1562             exit;
1563         }
1564         $thumbnailer = new Thumbnailer($conf);
1565         $link = $LINKSDB[$id];
1566         $link['thumbnail'] = $thumbnailer->get($link['url']);
1567         $LINKSDB[$id] = $link;
1568         $LINKSDB->save($conf->get('resource.page_cache'));
1569
1570         echo json_encode($link);
1571         exit;
1572     }
1573
1574     // -------- Otherwise, simply display search form and links:
1575     showLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager);
1576     exit;
1577 }
1578
1579 /**
1580  * Template for the list of links (<div id="linklist">)
1581  * This function fills all the necessary fields in the $PAGE for the template 'linklist.html'
1582  *
1583  * @param pageBuilder   $PAGE          pageBuilder instance.
1584  * @param LinkDB        $LINKSDB       LinkDB instance.
1585  * @param ConfigManager $conf          Configuration Manager instance.
1586  * @param PluginManager $pluginManager Plugin Manager instance.
1587  * @param LoginManager  $loginManager  LoginManager instance
1588  */
1589 function buildLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager)
1590 {
1591     // Used in templates
1592     if (isset($_GET['searchtags'])) {
1593         if (! empty($_GET['searchtags'])) {
1594             $searchtags = escape(normalize_spaces($_GET['searchtags']));
1595         } else {
1596             $searchtags = false;
1597         }
1598     } else {
1599         $searchtags = '';
1600     }
1601     $searchterm = !empty($_GET['searchterm']) ? escape(normalize_spaces($_GET['searchterm'])) : '';
1602
1603     // Smallhash filter
1604     if (! empty($_SERVER['QUERY_STRING'])
1605         && preg_match('/^[a-zA-Z0-9-_@]{6}($|&|#)/', $_SERVER['QUERY_STRING'])) {
1606         try {
1607             $linksToDisplay = $LINKSDB->filterHash($_SERVER['QUERY_STRING']);
1608         } catch (LinkNotFoundException $e) {
1609             $PAGE->render404($e->getMessage());
1610             exit;
1611         }
1612     } else {
1613         // Filter links according search parameters.
1614         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
1615         $request = [
1616             'searchtags' => $searchtags,
1617             'searchterm' => $searchterm,
1618         ];
1619         $linksToDisplay = $LINKSDB->filterSearch($request, false, $visibility, !empty($_SESSION['untaggedonly']));
1620     }
1621
1622     // ---- Handle paging.
1623     $keys = array();
1624     foreach ($linksToDisplay as $key => $value) {
1625         $keys[] = $key;
1626     }
1627
1628     // Select articles according to paging.
1629     $pagecount = ceil(count($keys) / $_SESSION['LINKS_PER_PAGE']);
1630     $pagecount = $pagecount == 0 ? 1 : $pagecount;
1631     $page= empty($_GET['page']) ? 1 : intval($_GET['page']);
1632     $page = $page < 1 ? 1 : $page;
1633     $page = $page > $pagecount ? $pagecount : $page;
1634     // Start index.
1635     $i = ($page-1) * $_SESSION['LINKS_PER_PAGE'];
1636     $end = $i + $_SESSION['LINKS_PER_PAGE'];
1637
1638     $thumbnailsEnabled = $conf->get('thumbnails.mode', Thumbnailer::MODE_NONE) !== Thumbnailer::MODE_NONE;
1639     if ($thumbnailsEnabled) {
1640         $thumbnailer = new Thumbnailer($conf);
1641     }
1642
1643     $linkDisp = array();
1644     while ($i<$end && $i<count($keys))
1645     {
1646         $link = $linksToDisplay[$keys[$i]];
1647         $link['description'] = format_description(
1648             $link['description'],
1649             $conf->get('redirector.url'),
1650             $conf->get('redirector.encode_url')
1651         );
1652         $classLi =  ($i % 2) != 0 ? '' : 'publicLinkHightLight';
1653         $link['class'] = $link['private'] == 0 ? $classLi : 'private';
1654         $link['timestamp'] = $link['created']->getTimestamp();
1655         if (! empty($link['updated'])) {
1656             $link['updated_timestamp'] = $link['updated']->getTimestamp();
1657         } else {
1658             $link['updated_timestamp'] = '';
1659         }
1660         $taglist = preg_split('/\s+/', $link['tags'], -1, PREG_SPLIT_NO_EMPTY);
1661         uasort($taglist, 'strcasecmp');
1662         $link['taglist'] = $taglist;
1663
1664         // Logged in, thumbnails enabled, not a note,
1665         // and (never retrieved yet or no valid cache file)
1666         if ($loginManager->isLoggedIn() && $thumbnailsEnabled && $link['url'][0] != '?'
1667             && (! isset($link['thumbnail']) || ($link['thumbnail'] !== false && ! is_file($link['thumbnail'])))
1668         ) {
1669             $elem = $LINKSDB[$keys[$i]];
1670             $elem['thumbnail'] = $thumbnailer->get($link['url']);
1671             $LINKSDB[$keys[$i]] = $elem;
1672             $updateDB = true;
1673             $link['thumbnail'] = $elem['thumbnail'];
1674         }
1675
1676         // Check for both signs of a note: starting with ? and 7 chars long.
1677         if ($link['url'][0] === '?' && strlen($link['url']) === 7) {
1678             $link['url'] = index_url($_SERVER) . $link['url'];
1679         }
1680
1681         $linkDisp[$keys[$i]] = $link;
1682         $i++;
1683     }
1684
1685     // If we retrieved new thumbnails, we update the database.
1686     if (!empty($updateDB)) {
1687         $LINKSDB->save($conf->get('resource.page_cache'));
1688     }
1689
1690     // Compute paging navigation
1691     $searchtagsUrl = $searchtags === '' ? '' : '&searchtags=' . urlencode($searchtags);
1692     $searchtermUrl = empty($searchterm) ? '' : '&searchterm=' . urlencode($searchterm);
1693     $previous_page_url = '';
1694     if ($i != count($keys)) {
1695         $previous_page_url = '?page=' . ($page+1) . $searchtermUrl . $searchtagsUrl;
1696     }
1697     $next_page_url='';
1698     if ($page>1) {
1699         $next_page_url = '?page=' . ($page-1) . $searchtermUrl . $searchtagsUrl;
1700     }
1701
1702     // Fill all template fields.
1703     $data = array(
1704         'previous_page_url' => $previous_page_url,
1705         'next_page_url' => $next_page_url,
1706         'page_current' => $page,
1707         'page_max' => $pagecount,
1708         'result_count' => count($linksToDisplay),
1709         'search_term' => $searchterm,
1710         'search_tags' => $searchtags,
1711         'visibility' => ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '',
1712         'redirector' => $conf->get('redirector.url'),  // Optional redirector URL.
1713         'links' => $linkDisp,
1714     );
1715
1716     // If there is only a single link, we change on-the-fly the title of the page.
1717     if (count($linksToDisplay) == 1) {
1718         $data['pagetitle'] = $linksToDisplay[$keys[0]]['title'] .' - '. $conf->get('general.title');
1719     } elseif (! empty($searchterm) || ! empty($searchtags)) {
1720         $data['pagetitle'] = t('Search: ');
1721         $data['pagetitle'] .= ! empty($searchterm) ? $searchterm .' ' : '';
1722         $bracketWrap = function ($tag) {
1723             return '['. $tag .']';
1724         };
1725         $data['pagetitle'] .= ! empty($searchtags)
1726             ? implode(' ', array_map($bracketWrap, preg_split('/\s+/', $searchtags))).' '
1727             : '';
1728         $data['pagetitle'] .= '- '. $conf->get('general.title');
1729     }
1730
1731     $pluginManager->executeHooks('render_linklist', $data, array('loggedin' => $loginManager->isLoggedIn()));
1732
1733     foreach ($data as $key => $value) {
1734         $PAGE->assign($key, $value);
1735     }
1736
1737     return;
1738 }
1739
1740 /**
1741  * Installation
1742  * This function should NEVER be called if the file data/config.php exists.
1743  *
1744  * @param ConfigManager  $conf           Configuration Manager instance.
1745  * @param SessionManager $sessionManager SessionManager instance
1746  * @param LoginManager   $loginManager   LoginManager instance
1747  */
1748 function install($conf, $sessionManager, $loginManager, $userspace) {
1749     // On free.fr host, make sure the /sessions directory exists, otherwise login will not work.
1750     if (endsWith($_SERVER['HTTP_HOST'],'.free.fr') && !is_dir($_SERVER['DOCUMENT_ROOT'].'/sessions')) mkdir($_SERVER['DOCUMENT_ROOT'].'/sessions',0705);
1751
1752
1753     // This part makes sure sessions works correctly.
1754     // (Because on some hosts, session.save_path may not be set correctly,
1755     // or we may not have write access to it.)
1756     if (isset($_GET['test_session']) && ( !isset($_SESSION) || !isset($_SESSION['session_tested']) || $_SESSION['session_tested']!='Working'))
1757     {
1758         // Step 2: Check if data in session is correct.
1759         $msg = t(
1760             '<pre>Sessions do not seem to work correctly on your server.<br>'.
1761             'Make sure the variable "session.save_path" is set correctly in your PHP config, '.
1762             'and that you have write access to it.<br>'.
1763             'It currently points to %s.<br>'.
1764             'On some browsers, accessing your server via a hostname like \'localhost\' '.
1765             'or any custom hostname without a dot causes cookie storage to fail. '.
1766             'We recommend accessing your server via it\'s IP address or Fully Qualified Domain Name.<br>'
1767         );
1768         $msg = sprintf($msg, session_save_path());
1769         echo $msg;
1770         echo '<br><a href="?">'. t('Click to try again.') .'</a></pre>';
1771         die;
1772     }
1773     if (!isset($_SESSION['session_tested']))
1774     {   // Step 1 : Try to store data in session and reload page.
1775         $_SESSION['session_tested'] = 'Working';  // Try to set a variable in session.
1776         header('Location: '.index_url($_SERVER).'?test_session');  // Redirect to check stored data.
1777     }
1778     if (isset($_GET['test_session']))
1779     {   // Step 3: Sessions are OK. Remove test parameter from URL.
1780         header('Location: '.index_url($_SERVER));
1781     }
1782
1783
1784     if (true)
1785     {
1786         $tz = 'UTC';
1787         if (!empty($_POST['continent']) && !empty($_POST['city'])
1788             && isTimeZoneValid($_POST['continent'], $_POST['city'])
1789         ) {
1790             $tz = $_POST['continent'].'/'.$_POST['city'];
1791         }
1792         $conf->set('general.timezone', $tz);
1793         $conf->set('credentials.login', $userspace);
1794         $salt = sha1(uniqid('', true) .'_'. mt_rand());
1795         $conf->set('credentials.salt', $salt);
1796         $hash = sha1(uniqid('', true) .'_'. mt_rand());
1797         $conf->set('credentials.hash', $hash);
1798         if (!empty($_POST['title'])) {
1799             $conf->set('general.title', escape($_POST['title']));
1800         } else {
1801             $conf->set('general.title', ucwords(str_replace("_", " ", $userspace)));
1802         }
1803         $conf->set('translation.language', escape($_POST['language']));
1804         $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1805         $conf->set('api.enabled', !empty($_POST['enableApi']));
1806         $conf->set(
1807             'api.secret',
1808             generate_api_secret(
1809                 $conf->get('credentials.login'),
1810                 $conf->get('credentials.salt')
1811             )
1812         );
1813         try {
1814             // Everything is ok, let's create config file.
1815             $conf->write($loginManager->isLoggedIn());
1816         }
1817         catch(Exception $e) {
1818             error_log(
1819                     'ERROR while writing config file after installation.' . PHP_EOL .
1820                     $e->getMessage()
1821                 );
1822
1823             // TODO: do not handle exceptions/errors in JS.
1824             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?\';</script>';
1825             exit;
1826         }
1827         echo '<script>alert("Shaarli is now configured. Please enter your login/password and start shaaring your links!");document.location=\'?do=login\';</script>';
1828         exit;
1829     }
1830
1831     $PAGE = new PageBuilder($conf, $_SESSION, null, $sessionManager->generateToken());
1832     list($continents, $cities) = generateTimeZoneData(timezone_identifiers_list(), date_default_timezone_get());
1833     $PAGE->assign('continents', $continents);
1834     $PAGE->assign('cities', $cities);
1835     $PAGE->assign('languages', Languages::getAvailableLanguages());
1836     $PAGE->renderPage('install');
1837     exit;
1838 }
1839
1840 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=dailyrss')) {
1841     showDailyRSS($conf, $loginManager);
1842     exit;
1843 }
1844
1845 if (!isset($_SESSION['LINKS_PER_PAGE'])) {
1846     $_SESSION['LINKS_PER_PAGE'] = $conf->get('general.links_per_page', 20);
1847 }
1848
1849 try {
1850     $history = new History($conf->get('resource.history'));
1851 } catch(Exception $e) {
1852     die($e->getMessage());
1853 }
1854
1855 $linkDb = new LinkDB(
1856     $conf->get('resource.datastore'),
1857     $loginManager->isLoggedIn(),
1858     $conf->get('privacy.hide_public_links'),
1859     $conf->get('redirector.url'),
1860     $conf->get('redirector.encode_url')
1861 );
1862
1863 $container = new \Slim\Container();
1864 $container['conf'] = $conf;
1865 $container['plugins'] = $pluginManager;
1866 $container['history'] = $history;
1867 $app = new \Slim\App($container);
1868
1869 // REST API routes
1870 if (isset($userspace)) {
1871   $mountpoint = '/' . $userspace . '/api/v1';
1872 } else {
1873   $mountpoint = '/api/v1';
1874 }
1875 $app->group($mountpoint, function() {
1876     $this->get('/info', '\Shaarli\Api\Controllers\Info:getInfo')->setName('getInfo');
1877     $this->get('/links', '\Shaarli\Api\Controllers\Links:getLinks')->setName('getLinks');
1878     $this->get('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:getLink')->setName('getLink');
1879     $this->post('/links', '\Shaarli\Api\Controllers\Links:postLink')->setName('postLink');
1880     $this->put('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:putLink')->setName('putLink');
1881     $this->delete('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:deleteLink')->setName('deleteLink');
1882
1883     $this->get('/tags', '\Shaarli\Api\Controllers\Tags:getTags')->setName('getTags');
1884     $this->get('/tags/{tagName:[\w]+}', '\Shaarli\Api\Controllers\Tags:getTag')->setName('getTag');
1885     $this->put('/tags/{tagName:[\w]+}', '\Shaarli\Api\Controllers\Tags:putTag')->setName('putTag');
1886     $this->delete('/tags/{tagName:[\w]+}', '\Shaarli\Api\Controllers\Tags:deleteTag')->setName('deleteTag');
1887
1888     $this->get('/history', '\Shaarli\Api\Controllers\History:getHistory')->setName('getHistory');
1889 })->add('\Shaarli\Api\ApiMiddleware');
1890
1891 $response = $app->run(true);
1892 // Hack to make Slim and Shaarli router work together:
1893 // If a Slim route isn't found and NOT API call, we call renderPage().
1894 if ($response->getStatusCode() == 404 && strpos($_SERVER['REQUEST_URI'], $mountpoint) === false) {
1895     // We use UTF-8 for proper international characters handling.
1896     header('Content-Type: text/html; charset=utf-8');
1897     renderPage($conf, $pluginManager, $linkDb, $history, $sessionManager, $loginManager);
1898 } else {
1899     $app->respond($response);
1900 }