index.php

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