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-requirements/\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\Languages;
  79 use \Shaarli\ThemeUtils;
  80 use \Shaarli\Config\ConfigManager;
  81 use \Shaarli\LoginManager;
  82 use \Shaarli\SessionManager;
  83
  84 // Ensure the PHP version is supported
  85 try {
  86     ApplicationUtils::checkPHPVersion('5.5', PHP_VERSION);
  87 } catch(Exception $exc) {
  88     header('Content-Type: text/plain; charset=utf-8');
  89     echo $exc->getMessage();
  90     exit;
  91 }
  92
  93 define('SHAARLI_VERSION', ApplicationUtils::getVersion(__DIR__ .'/'. ApplicationUtils::$VERSION_FILE));
  94
  95 // Force cookie path (but do not change lifetime)
  96 $cookie = session_get_cookie_params();
  97 $cookiedir = '';
  98 if (dirname($_SERVER['SCRIPT_NAME']) != '/') {
  99     $cookiedir = dirname($_SERVER["SCRIPT_NAME"]).'/';
 100 }
 101 // Set default cookie expiration and path.
 102 session_set_cookie_params($cookie['lifetime'], $cookiedir, $_SERVER['SERVER_NAME']);
 103 // Set session parameters on server side.
 104 // If the user does not access any page within this time, his/her session is considered expired.
 105 define('INACTIVITY_TIMEOUT', 3600); // in seconds.
 106 // Use cookies to store session.
 107 ini_set('session.use_cookies', 1);
 108 // Force cookies for session (phpsessionID forbidden in URL).
 109 ini_set('session.use_only_cookies', 1);
 110 // Prevent PHP form using sessionID in URL if cookies are disabled.
 111 ini_set('session.use_trans_sid', false);
 112
 113 session_name('shaarli');
 114 // Start session if needed (Some server auto-start sessions).
 115 if (session_id() == '') {
 116     session_start();
 117 }
 118
 119 // Regenerate session ID if invalid or not defined in cookie.
 120 if (isset($_COOKIE['shaarli']) && !SessionManager::checkId($_COOKIE['shaarli'])) {
 121     session_regenerate_id(true);
 122     $_COOKIE['shaarli'] = session_id();
 123 }
 124
 125 $conf = new ConfigManager();
 126 $loginManager = new LoginManager($GLOBALS, $conf);
 127 $sessionManager = new SessionManager($_SESSION, $conf);
 128
 129 // LC_MESSAGES isn't defined without php-intl, in this case use LC_COLLATE locale instead.
 130 if (! defined('LC_MESSAGES')) {
 131     define('LC_MESSAGES', LC_COLLATE);
 132 }
 133
 134 // Sniff browser language and set date format accordingly.
 135 if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
 136     autoLocale($_SERVER['HTTP_ACCEPT_LANGUAGE']);
 137 }
 138
 139 new Languages(setlocale(LC_MESSAGES, 0), $conf);
 140
 141 $conf->setEmpty('general.timezone', date_default_timezone_get());
 142 $conf->setEmpty('general.title', t('Shared links on '). escape(index_url($_SERVER)));
 143 RainTPL::$tpl_dir = $conf->get('resource.raintpl_tpl').'/'.$conf->get('resource.theme').'/'; // template directory
 144 RainTPL::$cache_dir = $conf->get('resource.raintpl_tmp'); // cache directory
 145
 146 $pluginManager = new PluginManager($conf);
 147 $pluginManager->load($conf->get('general.enabled_plugins'));
 148
 149 date_default_timezone_set($conf->get('general.timezone', 'UTC'));
 150
 151 ob_start();  // Output buffering for the page cache.
 152
 153 // Prevent caching on client side or proxy: (yes, it's ugly)
 154 header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
 155 header("Cache-Control: no-store, no-cache, must-revalidate");
 156 header("Cache-Control: post-check=0, pre-check=0", false);
 157 header("Pragma: no-cache");
 158
 159 if (! is_file($conf->getConfigFileExt())) {
 160     // Ensure Shaarli has proper access to its resources
 161     $errors = ApplicationUtils::checkResourcePermissions($conf);
 162
 163     if ($errors != array()) {
 164         $message = '<p>'. t('Insufficient permissions:') .'</p><ul>';
 165
 166         foreach ($errors as $error) {
 167             $message .= '<li>'.$error.'</li>';
 168         }
 169         $message .= '</ul>';
 170
 171         header('Content-Type: text/html; charset=utf-8');
 172         echo $message;
 173         exit;
 174     }
 175
 176     // Display the installation form if no existing config is found
 177     install($conf, $sessionManager);
 178 }
 179
 180 // a token depending of deployment salt, user password, and the current ip
 181 define('STAY_SIGNED_IN_TOKEN', sha1($conf->get('credentials.hash') . $_SERVER['REMOTE_ADDR'] . $conf->get('credentials.salt')));
 182
 183 /**
 184  * Checking session state (i.e. is the user still logged in)
 185  *
 186  * @param ConfigManager $conf The configuration manager.
 187  *
 188  * @return bool: true if the user is logged in, false otherwise.
 189  */
 190 function setup_login_state($conf)
 191 {
 192     if ($conf->get('security.open_shaarli')) {
 193         return true;
 194     }
 195     $userIsLoggedIn = false; // By default, we do not consider the user as logged in;
 196     $loginFailure = false; // If set to true, every attempt to authenticate the user will fail. This indicates that an important condition isn't met.
 197     if (! $conf->exists('credentials.login')) {
 198         $userIsLoggedIn = false;  // Shaarli is not configured yet.
 199         $loginFailure = true;
 200     }
 201     if (isset($_COOKIE['shaarli_staySignedIn']) &&
 202         $_COOKIE['shaarli_staySignedIn']===STAY_SIGNED_IN_TOKEN &&
 203         !$loginFailure)
 204     {
 205         fillSessionInfo($conf);
 206         $userIsLoggedIn = true;
 207     }
 208     // If session does not exist on server side, or IP address has changed, or session has expired, logout.
 209     if (empty($_SESSION['uid'])
 210         || ($conf->get('security.session_protection_disabled') === false && $_SESSION['ip'] != allIPs())
 211         || time() >= $_SESSION['expires_on'])
 212     {
 213         logout();
 214         $userIsLoggedIn = false;
 215         $loginFailure = true;
 216     }
 217     if (!empty($_SESSION['longlastingsession'])) {
 218         $_SESSION['expires_on']=time()+$_SESSION['longlastingsession']; // In case of "Stay signed in" checked.
 219     }
 220     else {
 221         $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT; // Standard session expiration date.
 222     }
 223     if (!$loginFailure) {
 224         $userIsLoggedIn = true;
 225     }
 226
 227     return $userIsLoggedIn;
 228 }
 229 $userIsLoggedIn = setup_login_state($conf);
 230
 231 // ------------------------------------------------------------------------------------------
 232 // Session management
 233
 234 // Returns the IP address of the client (Used to prevent session cookie hijacking.)
 235 function allIPs()
 236 {
 237     $ip = $_SERVER['REMOTE_ADDR'];
 238     // Then we use more HTTP headers to prevent session hijacking from users behind the same proxy.
 239     if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) { $ip=$ip.'_'.$_SERVER['HTTP_X_FORWARDED_FOR']; }
 240     if (isset($_SERVER['HTTP_CLIENT_IP'])) { $ip=$ip.'_'.$_SERVER['HTTP_CLIENT_IP']; }
 241     return $ip;
 242 }
 243
 244 /**
 245  * Load user session.
 246  *
 247  * @param ConfigManager $conf Configuration Manager instance.
 248  */
 249 function fillSessionInfo($conf)
 250 {
 251     $_SESSION['uid'] = sha1(uniqid('',true).'_'.mt_rand()); // Generate unique random number (different than phpsessionid)
 252     $_SESSION['ip']=allIPs();                // We store IP address(es) of the client to make sure session is not hijacked.
 253     $_SESSION['username']= $conf->get('credentials.login');
 254     $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT;  // Set session expiration.
 255 }
 256
 257 /**
 258  * Check that user/password is correct.
 259  *
 260  * @param string        $login    Username
 261  * @param string        $password User password
 262  * @param ConfigManager $conf     Configuration Manager instance.
 263  *
 264  * @return bool: authentication successful or not.
 265  */
 266 function check_auth($login, $password, $conf)
 267 {
 268     $hash = sha1($password . $login . $conf->get('credentials.salt'));
 269     if ($login == $conf->get('credentials.login') && $hash == $conf->get('credentials.hash'))
 270     {   // Login/password is correct.
 271         fillSessionInfo($conf);
 272         logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Login successful');
 273         return true;
 274     }
 275     logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Login failed for user '.$login);
 276     return false;
 277 }
 278
 279 // Returns true if the user is logged in.
 280 function isLoggedIn()
 281 {
 282     global $userIsLoggedIn;
 283     return $userIsLoggedIn;
 284 }
 285
 286 // Force logout.
 287 function logout() {
 288     if (isset($_SESSION)) {
 289         unset($_SESSION['uid']);
 290         unset($_SESSION['ip']);
 291         unset($_SESSION['username']);
 292         unset($_SESSION['visibility']);
 293         unset($_SESSION['untaggedonly']);
 294     }
 295     setcookie('shaarli_staySignedIn', FALSE, 0, WEB_PATH);
 296 }
 297
 298 // ------------------------------------------------------------------------------------------
 299 // Process login form: Check if login/password is correct.
 300 if (isset($_POST['login']))
 301 {
 302     if (! $loginManager->canLogin($_SERVER)) {
 303         die(t('I said: NO. You are banned for the moment. Go away.'));
 304     }
 305     if (isset($_POST['password'])
 306         && $sessionManager->checkToken($_POST['token'])
 307         && (check_auth($_POST['login'], $_POST['password'], $conf))
 308     ) {
 309         // Login/password is OK.
 310         $loginManager->handleSuccessfulLogin($_SERVER);
 311
 312         // If user wants to keep the session cookie even after the browser closes:
 313         if (!empty($_POST['longlastingsession'])) {
 314             $_SESSION['longlastingsession'] = 31536000; // (31536000 seconds = 1 year)
 315             $expiration = time() + $_SESSION['longlastingsession']; // calculate relative cookie expiration (1 year from now)
 316             setcookie('shaarli_staySignedIn', STAY_SIGNED_IN_TOKEN, $expiration, WEB_PATH);
 317             $_SESSION['expires_on'] = $expiration;  // Set session expiration on server-side.
 318
 319             $cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
 320             session_set_cookie_params($_SESSION['longlastingsession'],$cookiedir,$_SERVER['SERVER_NAME']); // Set session cookie expiration on client side
 321             // Note: Never forget the trailing slash on the cookie path!
 322             session_regenerate_id(true);  // Send cookie with new expiration date to browser.
 323         }
 324         else // Standard session expiration (=when browser closes)
 325         {
 326             $cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
 327             session_set_cookie_params(0,$cookiedir,$_SERVER['SERVER_NAME']); // 0 means "When browser closes"
 328             session_regenerate_id(true);
 329         }
 330
 331         // Optional redirect after login:
 332         if (isset($_GET['post'])) {
 333             $uri = '?post='. urlencode($_GET['post']);
 334             foreach (array('description', 'source', 'title', 'tags') as $param) {
 335                 if (!empty($_GET[$param])) {
 336                     $uri .= '&'.$param.'='.urlencode($_GET[$param]);
 337                 }
 338             }
 339             header('Location: '. $uri);
 340             exit;
 341         }
 342
 343         if (isset($_GET['edit_link'])) {
 344             header('Location: ?edit_link='. escape($_GET['edit_link']));
 345             exit;
 346         }
 347
 348         if (isset($_POST['returnurl'])) {
 349             // Prevent loops over login screen.
 350             if (strpos($_POST['returnurl'], 'do=login') === false) {
 351                 header('Location: '. generateLocation($_POST['returnurl'], $_SERVER['HTTP_HOST']));
 352                 exit;
 353             }
 354         }
 355         header('Location: ?'); exit;
 356     } else {
 357         $loginManager->handleFailedLogin($_SERVER);
 358         $redir = '&username='. urlencode($_POST['login']);
 359         if (isset($_GET['post'])) {
 360             $redir .= '&post=' . urlencode($_GET['post']);
 361             foreach (array('description', 'source', 'title', 'tags') as $param) {
 362                 if (!empty($_GET[$param])) {
 363                     $redir .= '&' . $param . '=' . urlencode($_GET[$param]);
 364                 }
 365             }
 366         }
 367         // Redirect to login screen.
 368         echo '<script>alert("'. t("Wrong login/password.") .'");document.location=\'?do=login'.$redir.'\';</script>';
 369         exit;
 370     }
 371 }
 372
 373 // ------------------------------------------------------------------------------------------
 374 // Token management for XSRF protection
 375 // Token should be used in any form which acts on data (create,update,delete,import...).
 376 if (!isset($_SESSION['tokens'])) $_SESSION['tokens']=array();  // Token are attached to the session.
 377
 378 /**
 379  * Daily RSS feed: 1 RSS entry per day giving all the links on that day.
 380  * Gives the last 7 days (which have links).
 381  * This RSS feed cannot be filtered.
 382  *
 383  * @param ConfigManager $conf Configuration Manager instance.
 384  */
 385 function showDailyRSS($conf) {
 386     // Cache system
 387     $query = $_SERVER['QUERY_STRING'];
 388     $cache = new CachedPage(
 389         $conf->get('config.PAGE_CACHE'),
 390         page_url($_SERVER),
 391         startsWith($query,'do=dailyrss') && !isLoggedIn()
 392     );
 393     $cached = $cache->cachedVersion();
 394     if (!empty($cached)) {
 395         echo $cached;
 396         exit;
 397     }
 398
 399     // If cached was not found (or not usable), then read the database and build the response:
 400     // Read links from database (and filter private links if used it not logged in).
 401     $LINKSDB = new LinkDB(
 402         $conf->get('resource.datastore'),
 403         isLoggedIn(),
 404         $conf->get('privacy.hide_public_links'),
 405         $conf->get('redirector.url'),
 406         $conf->get('redirector.encode_url')
 407     );
 408
 409     /* Some Shaarlies may have very few links, so we need to look
 410        back in time until we have enough days ($nb_of_days).
 411     */
 412     $nb_of_days = 7; // We take 7 days.
 413     $today = date('Ymd');
 414     $days = array();
 415
 416     foreach ($LINKSDB as $link) {
 417         $day = $link['created']->format('Ymd'); // Extract day (without time)
 418         if (strcmp($day, $today) < 0) {
 419             if (empty($days[$day])) {
 420                 $days[$day] = array();
 421             }
 422             $days[$day][] = $link;
 423         }
 424
 425         if (count($days) > $nb_of_days) {
 426             break; // Have we collected enough days?
 427         }
 428     }
 429
 430     // Build the RSS feed.
 431     header('Content-Type: application/rss+xml; charset=utf-8');
 432     $pageaddr = escape(index_url($_SERVER));
 433     echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0">';
 434     echo '<channel>';
 435     echo '<title>Daily - '. $conf->get('general.title') . '</title>';
 436     echo '<link>'. $pageaddr .'</link>';
 437     echo '<description>Daily shared links</description>';
 438     echo '<language>en-en</language>';
 439     echo '<copyright>'. $pageaddr .'</copyright>'. PHP_EOL;
 440
 441     // For each day.
 442     foreach ($days as $day => $links) {
 443         $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 444         $absurl = escape(index_url($_SERVER).'?do=daily&day='.$day);  // Absolute URL of the corresponding "Daily" page.
 445
 446         // We pre-format some fields for proper output.
 447         foreach ($links as &$link) {
 448             $link['formatedDescription'] = format_description(
 449                 $link['description'],
 450                 $conf->get('redirector.url'),
 451                 $conf->get('redirector.encode_url')
 452             );
 453             $link['thumbnail'] = thumbnail($conf, $link['url']);
 454             $link['timestamp'] = $link['created']->getTimestamp();
 455             if (startsWith($link['url'], '?')) {
 456                 $link['url'] = index_url($_SERVER) . $link['url'];  // make permalink URL absolute
 457             }
 458         }
 459
 460         // Then build the HTML for this day:
 461         $tpl = new RainTPL;
 462         $tpl->assign('title', $conf->get('general.title'));
 463         $tpl->assign('daydate', $dayDate->getTimestamp());
 464         $tpl->assign('absurl', $absurl);
 465         $tpl->assign('links', $links);
 466         $tpl->assign('rssdate', escape($dayDate->format(DateTime::RSS)));
 467         $tpl->assign('hide_timestamps', $conf->get('privacy.hide_timestamps', false));
 468         $html = $tpl->draw('dailyrss', true);
 469
 470         echo $html . PHP_EOL;
 471     }
 472     echo '</channel></rss><!-- Cached version of '. escape(page_url($_SERVER)) .' -->';
 473
 474     $cache->cache(ob_get_contents());
 475     ob_end_flush();
 476     exit;
 477 }
 478
 479 /**
 480  * Show the 'Daily' page.
 481  *
 482  * @param PageBuilder   $pageBuilder   Template engine wrapper.
 483  * @param LinkDB        $LINKSDB       LinkDB instance.
 484  * @param ConfigManager $conf          Configuration Manager instance.
 485  * @param PluginManager $pluginManager Plugin Manager instane.
 486  */
 487 function showDaily($pageBuilder, $LINKSDB, $conf, $pluginManager)
 488 {
 489     $day = date('Ymd', strtotime('-1 day')); // Yesterday, in format YYYYMMDD.
 490     if (isset($_GET['day'])) {
 491       $day = $_GET['day'];
 492     }
 493
 494     $days = $LINKSDB->days();
 495     $i = array_search($day, $days);
 496     if ($i === false && count($days)) {
 497         // no links for day, but at least one day with links
 498         $i = count($days) - 1;
 499         $day = $days[$i];
 500     }
 501     $previousday = '';
 502     $nextday = '';
 503
 504     if ($i !== false) {
 505         if ($i >= 1) {
 506              $previousday=$days[$i - 1];
 507         }
 508         if ($i < count($days) - 1) {
 509           $nextday = $days[$i + 1];
 510         }
 511     }
 512     try {
 513         $linksToDisplay = $LINKSDB->filterDay($day);
 514     } catch (Exception $exc) {
 515         error_log($exc);
 516         $linksToDisplay = array();
 517     }
 518
 519     // We pre-format some fields for proper output.
 520     foreach($linksToDisplay as $key => $link) {
 521         $taglist = explode(' ',$link['tags']);
 522         uasort($taglist, 'strcasecmp');
 523         $linksToDisplay[$key]['taglist']=$taglist;
 524         $linksToDisplay[$key]['formatedDescription'] = format_description(
 525             $link['description'],
 526             $conf->get('redirector.url'),
 527             $conf->get('redirector.encode_url')
 528         );
 529         $linksToDisplay[$key]['thumbnail'] = thumbnail($conf, $link['url']);
 530         $linksToDisplay[$key]['timestamp'] =  $link['created']->getTimestamp();
 531     }
 532
 533     $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 534     $data = array(
 535         'pagetitle' => $conf->get('general.title') .' - '. format_date($dayDate, false),
 536         'linksToDisplay' => $linksToDisplay,
 537         'day' => $dayDate->getTimestamp(),
 538         'dayDate' => $dayDate,
 539         'previousday' => $previousday,
 540         'nextday' => $nextday,
 541     );
 542
 543     /* Hook is called before column construction so that plugins don't have
 544        to deal with columns. */
 545     $pluginManager->executeHooks('render_daily', $data, array('loggedin' => isLoggedIn()));
 546
 547     /* We need to spread the articles on 3 columns.
 548        I did not want to use a JavaScript lib like http://masonry.desandro.com/
 549        so I manually spread entries with a simple method: I roughly evaluate the
 550        height of a div according to title and description length.
 551     */
 552     $columns = array(array(), array(), array()); // Entries to display, for each column.
 553     $fill = array(0, 0, 0);  // Rough estimate of columns fill.
 554     foreach($data['linksToDisplay'] as $key => $link) {
 555         // Roughly estimate length of entry (by counting characters)
 556         // Title: 30 chars = 1 line. 1 line is 30 pixels height.
 557         // Description: 836 characters gives roughly 342 pixel height.
 558         // This is not perfect, but it's usually OK.
 559         $length = strlen($link['title']) + (342 * strlen($link['description'])) / 836;
 560         if ($link['thumbnail']) {
 561           $length += 100; // 1 thumbnails roughly takes 100 pixels height.
 562         }
 563         // Then put in column which is the less filled:
 564         $smallest = min($fill); // find smallest value in array.
 565         $index = array_search($smallest, $fill); // find index of this smallest value.
 566         array_push($columns[$index], $link); // Put entry in this column.
 567         $fill[$index] += $length;
 568     }
 569
 570     $data['cols'] = $columns;
 571
 572     foreach ($data as $key => $value) {
 573         $pageBuilder->assign($key, $value);
 574     }
 575
 576     $pageBuilder->assign('pagetitle', t('Daily') .' - '. $conf->get('general.title', 'Shaarli'));
 577     $pageBuilder->renderPage('daily');
 578     exit;
 579 }
 580
 581 /**
 582  * Renders the linklist
 583  *
 584  * @param pageBuilder   $PAGE    pageBuilder instance.
 585  * @param LinkDB        $LINKSDB LinkDB instance.
 586  * @param ConfigManager $conf    Configuration Manager instance.
 587  * @param PluginManager $pluginManager Plugin Manager instance.
 588  */
 589 function showLinkList($PAGE, $LINKSDB, $conf, $pluginManager) {
 590     buildLinkList($PAGE,$LINKSDB, $conf, $pluginManager); // Compute list of links to display
 591     $PAGE->renderPage('linklist');
 592 }
 593
 594 /**
 595  * Render HTML page (according to URL parameters and user rights)
 596  *
 597  * @param ConfigManager  $conf           Configuration Manager instance.
 598  * @param PluginManager  $pluginManager  Plugin Manager instance,
 599  * @param LinkDB         $LINKSDB
 600  * @param History        $history        instance
 601  * @param SessionManager $sessionManager SessionManager instance
 602  * @param LoginManager   $loginManager   LoginManager instance
 603  */
 604 function renderPage($conf, $pluginManager, $LINKSDB, $history, $sessionManager, $loginManager)
 605 {
 606     $updater = new Updater(
 607         read_updates_file($conf->get('resource.updates')),
 608         $LINKSDB,
 609         $conf,
 610         isLoggedIn()
 611     );
 612     try {
 613         $newUpdates = $updater->update();
 614         if (! empty($newUpdates)) {
 615             write_updates_file(
 616                 $conf->get('resource.updates'),
 617                 $updater->getDoneUpdates()
 618             );
 619         }
 620     }
 621     catch(Exception $e) {
 622         die($e->getMessage());
 623     }
 624
 625     $PAGE = new PageBuilder($conf, $LINKSDB, $sessionManager->generateToken());
 626     $PAGE->assign('linkcount', count($LINKSDB));
 627     $PAGE->assign('privateLinkcount', count_private($LINKSDB));
 628     $PAGE->assign('plugin_errors', $pluginManager->getErrors());
 629
 630     // Determine which page will be rendered.
 631     $query = (isset($_SERVER['QUERY_STRING'])) ? $_SERVER['QUERY_STRING'] : '';
 632     $targetPage = Router::findPage($query, $_GET, isLoggedIn());
 633
 634     if (
 635         // if the user isn't logged in
 636         !isLoggedIn() &&
 637         // and Shaarli doesn't have public content...
 638         $conf->get('privacy.hide_public_links') &&
 639         // and is configured to enforce the login
 640         $conf->get('privacy.force_login') &&
 641         // and the current page isn't already the login page
 642         $targetPage !== Router::$PAGE_LOGIN &&
 643         // and the user is not requesting a feed (which would lead to a different content-type as expected)
 644         $targetPage !== Router::$PAGE_FEED_ATOM &&
 645         $targetPage !== Router::$PAGE_FEED_RSS
 646     ) {
 647         // force current page to be the login page
 648         $targetPage = Router::$PAGE_LOGIN;
 649     }
 650
 651     // Call plugin hooks for header, footer and includes, specifying which page will be rendered.
 652     // Then assign generated data to RainTPL.
 653     $common_hooks = array(
 654         'includes',
 655         'header',
 656         'footer',
 657     );
 658
 659     foreach($common_hooks as $name) {
 660         $plugin_data = array();
 661         $pluginManager->executeHooks('render_' . $name, $plugin_data,
 662             array(
 663                 'target' => $targetPage,
 664                 'loggedin' => isLoggedIn()
 665             )
 666         );
 667         $PAGE->assign('plugins_' . $name, $plugin_data);
 668     }
 669
 670     // -------- Display login form.
 671     if ($targetPage == Router::$PAGE_LOGIN)
 672     {
 673         if ($conf->get('security.open_shaarli')) { header('Location: ?'); exit; }  // No need to login for open Shaarli
 674         if (isset($_GET['username'])) {
 675             $PAGE->assign('username', escape($_GET['username']));
 676         }
 677         $PAGE->assign('returnurl',(isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']):''));
 678         // add default state of the 'remember me' checkbox
 679         $PAGE->assign('remember_user_default', $conf->get('privacy.remember_user_default'));
 680         $PAGE->assign('user_can_login', $loginManager->canLogin($_SERVER));
 681         $PAGE->assign('pagetitle', t('Login') .' - '. $conf->get('general.title', 'Shaarli'));
 682         $PAGE->renderPage('loginform');
 683         exit;
 684     }
 685     // -------- User wants to logout.
 686     if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=logout'))
 687     {
 688         invalidateCaches($conf->get('resource.page_cache'));
 689         logout();
 690         header('Location: ?');
 691         exit;
 692     }
 693
 694     // -------- Picture wall
 695     if ($targetPage == Router::$PAGE_PICWALL)
 696     {
 697         // Optionally filter the results:
 698         $links = $LINKSDB->filterSearch($_GET);
 699         $linksToDisplay = array();
 700
 701         // Get only links which have a thumbnail.
 702         foreach($links as $link)
 703         {
 704             $permalink='?'.$link['shorturl'];
 705             $thumb=lazyThumbnail($conf, $link['url'],$permalink);
 706             if ($thumb!='') // Only output links which have a thumbnail.
 707             {
 708                 $link['thumbnail']=$thumb; // Thumbnail HTML code.
 709                 $linksToDisplay[]=$link; // Add to array.
 710             }
 711         }
 712
 713         $data = array(
 714             'linksToDisplay' => $linksToDisplay,
 715         );
 716         $pluginManager->executeHooks('render_picwall', $data, array('loggedin' => isLoggedIn()));
 717
 718         foreach ($data as $key => $value) {
 719             $PAGE->assign($key, $value);
 720         }
 721
 722         $PAGE->assign('pagetitle', t('Picture wall') .' - '. $conf->get('general.title', 'Shaarli'));
 723         $PAGE->renderPage('picwall');
 724         exit;
 725     }
 726
 727     // -------- Tag cloud
 728     if ($targetPage == Router::$PAGE_TAGCLOUD)
 729     {
 730         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
 731         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 732         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 733
 734         // We sort tags alphabetically, then choose a font size according to count.
 735         // First, find max value.
 736         $maxcount = 0;
 737         foreach ($tags as $value) {
 738             $maxcount = max($maxcount, $value);
 739         }
 740
 741         alphabetical_sort($tags, false, true);
 742
 743         $tagList = array();
 744         foreach($tags as $key => $value) {
 745             if (in_array($key, $filteringTags)) {
 746                 continue;
 747             }
 748             // Tag font size scaling:
 749             //   default 15 and 30 logarithm bases affect scaling,
 750             //   22 and 6 are arbitrary font sizes for max and min sizes.
 751             $size = log($value, 15) / log($maxcount, 30) * 2.2 + 0.8;
 752             $tagList[$key] = array(
 753                 'count' => $value,
 754                 'size' => number_format($size, 2, '.', ''),
 755             );
 756         }
 757
 758         $searchTags = implode(' ', escape($filteringTags));
 759         $data = array(
 760             'search_tags' => $searchTags,
 761             'tags' => $tagList,
 762         );
 763         $pluginManager->executeHooks('render_tagcloud', $data, array('loggedin' => isLoggedIn()));
 764
 765         foreach ($data as $key => $value) {
 766             $PAGE->assign($key, $value);
 767         }
 768
 769         $searchTags = ! empty($searchTags) ? $searchTags .' - ' : '';
 770         $PAGE->assign('pagetitle', $searchTags. t('Tag cloud') .' - '. $conf->get('general.title', 'Shaarli'));
 771         $PAGE->renderPage('tag.cloud');
 772         exit;
 773     }
 774
 775     // -------- Tag list
 776     if ($targetPage == Router::$PAGE_TAGLIST)
 777     {
 778         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
 779         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 780         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 781         foreach ($filteringTags as $tag) {
 782             if (array_key_exists($tag, $tags)) {
 783                 unset($tags[$tag]);
 784             }
 785         }
 786
 787         if (! empty($_GET['sort']) && $_GET['sort'] === 'alpha') {
 788             alphabetical_sort($tags, false, true);
 789         }
 790
 791         $searchTags = implode(' ', escape($filteringTags));
 792         $data = [
 793             'search_tags' => $searchTags,
 794             'tags' => $tags,
 795         ];
 796         $pluginManager->executeHooks('render_taglist', $data, ['loggedin' => isLoggedIn()]);
 797
 798         foreach ($data as $key => $value) {
 799             $PAGE->assign($key, $value);
 800         }
 801
 802         $searchTags = ! empty($searchTags) ? $searchTags .' - ' : '';
 803         $PAGE->assign('pagetitle', $searchTags . t('Tag list') .' - '. $conf->get('general.title', 'Shaarli'));
 804         $PAGE->renderPage('tag.list');
 805         exit;
 806     }
 807
 808     // Daily page.
 809     if ($targetPage == Router::$PAGE_DAILY) {
 810         showDaily($PAGE, $LINKSDB, $conf, $pluginManager);
 811     }
 812
 813     // ATOM and RSS feed.
 814     if ($targetPage == Router::$PAGE_FEED_ATOM || $targetPage == Router::$PAGE_FEED_RSS) {
 815         $feedType = $targetPage == Router::$PAGE_FEED_RSS ? FeedBuilder::$FEED_RSS : FeedBuilder::$FEED_ATOM;
 816         header('Content-Type: application/'. $feedType .'+xml; charset=utf-8');
 817
 818         // Cache system
 819         $query = $_SERVER['QUERY_STRING'];
 820         $cache = new CachedPage(
 821             $conf->get('resource.page_cache'),
 822             page_url($_SERVER),
 823             startsWith($query,'do='. $targetPage) && !isLoggedIn()
 824         );
 825         $cached = $cache->cachedVersion();
 826         if (!empty($cached)) {
 827             echo $cached;
 828             exit;
 829         }
 830
 831         // Generate data.
 832         $feedGenerator = new FeedBuilder($LINKSDB, $feedType, $_SERVER, $_GET, isLoggedIn());
 833         $feedGenerator->setLocale(strtolower(setlocale(LC_COLLATE, 0)));
 834         $feedGenerator->setHideDates($conf->get('privacy.hide_timestamps') && !isLoggedIn());
 835         $feedGenerator->setUsePermalinks(isset($_GET['permalinks']) || !$conf->get('feed.rss_permalinks'));
 836         $data = $feedGenerator->buildData();
 837
 838         // Process plugin hook.
 839         $pluginManager->executeHooks('render_feed', $data, array(
 840             'loggedin' => isLoggedIn(),
 841             'target' => $targetPage,
 842         ));
 843
 844         // Render the template.
 845         $PAGE->assignAll($data);
 846         $PAGE->renderPage('feed.'. $feedType);
 847         $cache->cache(ob_get_contents());
 848         ob_end_flush();
 849         exit;
 850     }
 851
 852     // Display opensearch plugin (XML)
 853     if ($targetPage == Router::$PAGE_OPENSEARCH) {
 854         header('Content-Type: application/xml; charset=utf-8');
 855         $PAGE->assign('serverurl', index_url($_SERVER));
 856         $PAGE->renderPage('opensearch');
 857         exit;
 858     }
 859
 860     // -------- User clicks on a tag in a link: The tag is added to the list of searched tags (searchtags=...)
 861     if (isset($_GET['addtag']))
 862     {
 863         // Get previous URL (http_referer) and add the tag to the searchtags parameters in query.
 864         if (empty($_SERVER['HTTP_REFERER'])) { header('Location: ?searchtags='.urlencode($_GET['addtag'])); exit; } // In case browser does not send HTTP_REFERER
 865         parse_str(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_QUERY), $params);
 866
 867         // Prevent redirection loop
 868         if (isset($params['addtag'])) {
 869             unset($params['addtag']);
 870         }
 871
 872         // Check if this tag is already in the search query and ignore it if it is.
 873         // Each tag is always separated by a space
 874         if (isset($params['searchtags'])) {
 875             $current_tags = explode(' ', $params['searchtags']);
 876         } else {
 877             $current_tags = array();
 878         }
 879         $addtag = true;
 880         foreach ($current_tags as $value) {
 881             if ($value === $_GET['addtag']) {
 882                 $addtag = false;
 883                 break;
 884             }
 885         }
 886         // Append the tag if necessary
 887         if (empty($params['searchtags'])) {
 888             $params['searchtags'] = trim($_GET['addtag']);
 889         }
 890         elseif ($addtag) {
 891             $params['searchtags'] = trim($params['searchtags']).' '.trim($_GET['addtag']);
 892         }
 893
 894         unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
 895         header('Location: ?'.http_build_query($params));
 896         exit;
 897     }
 898
 899     // -------- User clicks on a tag in result count: Remove the tag from the list of searched tags (searchtags=...)
 900     if (isset($_GET['removetag'])) {
 901         // Get previous URL (http_referer) and remove the tag from the searchtags parameters in query.
 902         if (empty($_SERVER['HTTP_REFERER'])) {
 903             header('Location: ?');
 904             exit;
 905         }
 906
 907         // In case browser does not send HTTP_REFERER
 908         parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $params);
 909
 910         // Prevent redirection loop
 911         if (isset($params['removetag'])) {
 912             unset($params['removetag']);
 913         }
 914
 915         if (isset($params['searchtags'])) {
 916             $tags = explode(' ', $params['searchtags']);
 917             // Remove value from array $tags.
 918             $tags = array_diff($tags, array($_GET['removetag']));
 919             $params['searchtags'] = implode(' ',$tags);
 920
 921             if (empty($params['searchtags'])) {
 922                 unset($params['searchtags']);
 923             }
 924
 925             unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
 926         }
 927         header('Location: ?'.http_build_query($params));
 928         exit;
 929     }
 930
 931     // -------- User wants to change the number of links per page (linksperpage=...)
 932     if (isset($_GET['linksperpage'])) {
 933         if (is_numeric($_GET['linksperpage'])) {
 934             $_SESSION['LINKS_PER_PAGE']=abs(intval($_GET['linksperpage']));
 935         }
 936
 937         if (! empty($_SERVER['HTTP_REFERER'])) {
 938             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('linksperpage'));
 939         } else {
 940             $location = '?';
 941         }
 942         header('Location: '. $location);
 943         exit;
 944     }
 945
 946     // -------- User wants to see only private links (toggle)
 947     if (isset($_GET['visibility'])) {
 948         if ($_GET['visibility'] === 'private') {
 949             // Visibility not set or not already private, set private, otherwise reset it
 950             if (empty($_SESSION['visibility']) || $_SESSION['visibility'] !== 'private') {
 951                 // See only private links
 952                 $_SESSION['visibility'] = 'private';
 953             } else {
 954                 unset($_SESSION['visibility']);
 955             }
 956         } elseif ($_GET['visibility'] === 'public') {
 957             if (empty($_SESSION['visibility']) || $_SESSION['visibility'] !== 'public') {
 958                 // See only public links
 959                 $_SESSION['visibility'] = 'public';
 960             } else {
 961                 unset($_SESSION['visibility']);
 962             }
 963         }
 964
 965         if (! empty($_SERVER['HTTP_REFERER'])) {
 966             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('visibility'));
 967         } else {
 968             $location = '?';
 969         }
 970         header('Location: '. $location);
 971         exit;
 972     }
 973
 974     // -------- User wants to see only untagged links (toggle)
 975     if (isset($_GET['untaggedonly'])) {
 976         $_SESSION['untaggedonly'] = empty($_SESSION['untaggedonly']);
 977
 978         if (! empty($_SERVER['HTTP_REFERER'])) {
 979             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('untaggedonly'));
 980         } else {
 981             $location = '?';
 982         }
 983         header('Location: '. $location);
 984         exit;
 985     }
 986
 987     // -------- Handle other actions allowed for non-logged in users:
 988     if (!isLoggedIn())
 989     {
 990         // User tries to post new link but is not logged in:
 991         // Show login screen, then redirect to ?post=...
 992         if (isset($_GET['post']))
 993         {
 994             header( // Redirect to login page, then back to post link.
 995                 'Location: ?do=login&post='.urlencode($_GET['post']).
 996                 (!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').
 997                 (!empty($_GET['description'])?'&description='.urlencode($_GET['description']):'').
 998                 (!empty($_GET['tags'])?'&tags='.urlencode($_GET['tags']):'').
 999                 (!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')
1000             );
1001             exit;
1002         }
1003
1004         showLinkList($PAGE, $LINKSDB, $conf, $pluginManager);
1005         if (isset($_GET['edit_link'])) {
1006             header('Location: ?do=login&edit_link='. escape($_GET['edit_link']));
1007             exit;
1008         }
1009
1010         exit; // Never remove this one! All operations below are reserved for logged in user.
1011     }
1012
1013     // -------- All other functions are reserved for the registered user:
1014
1015     // -------- Display the Tools menu if requested (import/export/bookmarklet...)
1016     if ($targetPage == Router::$PAGE_TOOLS)
1017     {
1018         $data = [
1019             'pageabsaddr' => index_url($_SERVER),
1020             'sslenabled' => is_https($_SERVER),
1021         ];
1022         $pluginManager->executeHooks('render_tools', $data);
1023
1024         foreach ($data as $key => $value) {
1025             $PAGE->assign($key, $value);
1026         }
1027
1028         $PAGE->assign('pagetitle', t('Tools') .' - '. $conf->get('general.title', 'Shaarli'));
1029         $PAGE->renderPage('tools');
1030         exit;
1031     }
1032
1033     // -------- User wants to change his/her password.
1034     if ($targetPage == Router::$PAGE_CHANGEPASSWORD)
1035     {
1036         if ($conf->get('security.open_shaarli')) {
1037             die(t('You are not supposed to change a password on an Open Shaarli.'));
1038         }
1039
1040         if (!empty($_POST['setpassword']) && !empty($_POST['oldpassword']))
1041         {
1042             if (!$sessionManager->checkToken($_POST['token'])) die(t('Wrong token.')); // Go away!
1043
1044             // Make sure old password is correct.
1045             $oldhash = sha1($_POST['oldpassword'].$conf->get('credentials.login').$conf->get('credentials.salt'));
1046             if ($oldhash!= $conf->get('credentials.hash')) {
1047                 echo '<script>alert("'. t('The old password is not correct.') .'");document.location=\'?do=changepasswd\';</script>';
1048                 exit;
1049             }
1050             // Save new password
1051             // Salt renders rainbow-tables attacks useless.
1052             $conf->set('credentials.salt', sha1(uniqid('', true) .'_'. mt_rand()));
1053             $conf->set('credentials.hash', sha1($_POST['setpassword'] . $conf->get('credentials.login') . $conf->get('credentials.salt')));
1054             try {
1055                 $conf->write(isLoggedIn());
1056             }
1057             catch(Exception $e) {
1058                 error_log(
1059                     'ERROR while writing config file after changing password.' . PHP_EOL .
1060                     $e->getMessage()
1061                 );
1062
1063                 // TODO: do not handle exceptions/errors in JS.
1064                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=tools\';</script>';
1065                 exit;
1066             }
1067             echo '<script>alert("'. t('Your password has been changed') .'");document.location=\'?do=tools\';</script>';
1068             exit;
1069         }
1070         else // show the change password form.
1071         {
1072             $PAGE->assign('pagetitle', t('Change password') .' - '. $conf->get('general.title', 'Shaarli'));
1073             $PAGE->renderPage('changepassword');
1074             exit;
1075         }
1076     }
1077
1078     // -------- User wants to change configuration
1079     if ($targetPage == Router::$PAGE_CONFIGURE)
1080     {
1081         if (!empty($_POST['title']) )
1082         {
1083             if (!$sessionManager->checkToken($_POST['token'])) {
1084                 die(t('Wrong token.')); // Go away!
1085             }
1086             $tz = 'UTC';
1087             if (!empty($_POST['continent']) && !empty($_POST['city'])
1088                 && isTimeZoneValid($_POST['continent'], $_POST['city'])
1089             ) {
1090                 $tz = $_POST['continent'] . '/' . $_POST['city'];
1091             }
1092             $conf->set('general.timezone', $tz);
1093             $conf->set('general.title', escape($_POST['title']));
1094             $conf->set('general.header_link', escape($_POST['titleLink']));
1095             $conf->set('resource.theme', escape($_POST['theme']));
1096             $conf->set('security.session_protection_disabled', !empty($_POST['disablesessionprotection']));
1097             $conf->set('privacy.default_private_links', !empty($_POST['privateLinkByDefault']));
1098             $conf->set('feed.rss_permalinks', !empty($_POST['enableRssPermalinks']));
1099             $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1100             $conf->set('privacy.hide_public_links', !empty($_POST['hidePublicLinks']));
1101             $conf->set('api.enabled', !empty($_POST['enableApi']));
1102             $conf->set('api.secret', escape($_POST['apiSecret']));
1103             $conf->set('translation.language', escape($_POST['language']));
1104
1105             try {
1106                 $conf->write(isLoggedIn());
1107                 $history->updateSettings();
1108                 invalidateCaches($conf->get('resource.page_cache'));
1109             }
1110             catch(Exception $e) {
1111                 error_log(
1112                     'ERROR while writing config file after configuration update.' . PHP_EOL .
1113                     $e->getMessage()
1114                 );
1115
1116                 // TODO: do not handle exceptions/errors in JS.
1117                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=configure\';</script>';
1118                 exit;
1119             }
1120             echo '<script>alert("'. t('Configuration was saved.') .'");document.location=\'?do=configure\';</script>';
1121             exit;
1122         }
1123         else // Show the configuration form.
1124         {
1125             $PAGE->assign('title', $conf->get('general.title'));
1126             $PAGE->assign('theme', $conf->get('resource.theme'));
1127             $PAGE->assign('theme_available', ThemeUtils::getThemes($conf->get('resource.raintpl_tpl')));
1128             list($continents, $cities) = generateTimeZoneData(
1129                 timezone_identifiers_list(),
1130                 $conf->get('general.timezone')
1131             );
1132             $PAGE->assign('continents', $continents);
1133             $PAGE->assign('cities', $cities);
1134             $PAGE->assign('private_links_default', $conf->get('privacy.default_private_links', false));
1135             $PAGE->assign('session_protection_disabled', $conf->get('security.session_protection_disabled', false));
1136             $PAGE->assign('enable_rss_permalinks', $conf->get('feed.rss_permalinks', false));
1137             $PAGE->assign('enable_update_check', $conf->get('updates.check_updates', true));
1138             $PAGE->assign('hide_public_links', $conf->get('privacy.hide_public_links', false));
1139             $PAGE->assign('api_enabled', $conf->get('api.enabled', true));
1140             $PAGE->assign('api_secret', $conf->get('api.secret'));
1141             $PAGE->assign('languages', Languages::getAvailableLanguages());
1142             $PAGE->assign('language', $conf->get('translation.language'));
1143             $PAGE->assign('pagetitle', t('Configure') .' - '. $conf->get('general.title', 'Shaarli'));
1144             $PAGE->renderPage('configure');
1145             exit;
1146         }
1147     }
1148
1149     // -------- User wants to rename a tag or delete it
1150     if ($targetPage == Router::$PAGE_CHANGETAG)
1151     {
1152         if (empty($_POST['fromtag']) || (empty($_POST['totag']) && isset($_POST['renametag']))) {
1153             $PAGE->assign('fromtag', ! empty($_GET['fromtag']) ? escape($_GET['fromtag']) : '');
1154             $PAGE->assign('pagetitle', t('Manage tags') .' - '. $conf->get('general.title', 'Shaarli'));
1155             $PAGE->renderPage('changetag');
1156             exit;
1157         }
1158
1159         if (!$sessionManager->checkToken($_POST['token'])) {
1160             die(t('Wrong token.'));
1161         }
1162
1163         $alteredLinks = $LINKSDB->renameTag(escape($_POST['fromtag']), escape($_POST['totag']));
1164         $LINKSDB->save($conf->get('resource.page_cache'));
1165         foreach ($alteredLinks as $link) {
1166             $history->updateLink($link);
1167         }
1168         $delete = empty($_POST['totag']);
1169         $redirect = $delete ? 'do=changetag' : 'searchtags='. urlencode(escape($_POST['totag']));
1170         $count = count($alteredLinks);
1171         $alert = $delete
1172             ? sprintf(t('The tag was removed from %d link.', 'The tag was removed from %d links.', $count), $count)
1173             : sprintf(t('The tag was renamed in %d link.', 'The tag was renamed in %d links.', $count), $count);
1174         echo '<script>alert("'. $alert .'");document.location=\'?'. $redirect .'\';</script>';
1175         exit;
1176     }
1177
1178     // -------- User wants to add a link without using the bookmarklet: Show form.
1179     if ($targetPage == Router::$PAGE_ADDLINK)
1180     {
1181         $PAGE->assign('pagetitle', t('Shaare a new link') .' - '. $conf->get('general.title', 'Shaarli'));
1182         $PAGE->renderPage('addlink');
1183         exit;
1184     }
1185
1186     // -------- User clicked the "Save" button when editing a link: Save link to database.
1187     if (isset($_POST['save_edit']))
1188     {
1189         // Go away!
1190         if (! $sessionManager->checkToken($_POST['token'])) {
1191             die(t('Wrong token.'));
1192         }
1193
1194         // lf_id should only be present if the link exists.
1195         $id = isset($_POST['lf_id']) ? intval(escape($_POST['lf_id'])) : $LINKSDB->getNextId();
1196         // Linkdate is kept here to:
1197         //   - use the same permalink for notes as they're displayed when creating them
1198         //   - let users hack creation date of their posts
1199         //     See: https://shaarli.readthedocs.io/en/master/Various-hacks/#changing-the-timestamp-for-a-shaare
1200         $linkdate = escape($_POST['lf_linkdate']);
1201         if (isset($LINKSDB[$id])) {
1202             // Edit
1203             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1204             $updated = new DateTime();
1205             $shortUrl = $LINKSDB[$id]['shorturl'];
1206             $new = false;
1207         } else {
1208             // New link
1209             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1210             $updated = null;
1211             $shortUrl = link_small_hash($created, $id);
1212             $new = true;
1213         }
1214
1215         // Remove multiple spaces.
1216         $tags = trim(preg_replace('/\s\s+/', ' ', $_POST['lf_tags']));
1217         // Remove first '-' char in tags.
1218         $tags = preg_replace('/(^| )\-/', '$1', $tags);
1219         // Remove duplicates.
1220         $tags = implode(' ', array_unique(explode(' ', $tags)));
1221
1222         if (empty(trim($_POST['lf_url']))) {
1223             $_POST['lf_url'] = '?' . smallHash($linkdate . $id);
1224         }
1225         $url = whitelist_protocols(trim($_POST['lf_url']), $conf->get('security.allowed_protocols'));
1226
1227         $link = array(
1228             'id' => $id,
1229             'title' => trim($_POST['lf_title']),
1230             'url' => $url,
1231             'description' => $_POST['lf_description'],
1232             'private' => (isset($_POST['lf_private']) ? 1 : 0),
1233             'created' => $created,
1234             'updated' => $updated,
1235             'tags' => str_replace(',', ' ', $tags),
1236             'shorturl' => $shortUrl,
1237         );
1238
1239         // If title is empty, use the URL as title.
1240         if ($link['title'] == '') {
1241             $link['title'] = $link['url'];
1242         }
1243
1244         $pluginManager->executeHooks('save_link', $link);
1245
1246         $LINKSDB[$id] = $link;
1247         $LINKSDB->save($conf->get('resource.page_cache'));
1248         if ($new) {
1249             $history->addLink($link);
1250         } else {
1251             $history->updateLink($link);
1252         }
1253
1254         // If we are called from the bookmarklet, we must close the popup:
1255         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1256             echo '<script>self.close();</script>';
1257             exit;
1258         }
1259
1260         $returnurl = !empty($_POST['returnurl']) ? $_POST['returnurl'] : '?';
1261         $location = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1262         // Scroll to the link which has been edited.
1263         $location .= '#' . $link['shorturl'];
1264         // After saving the link, redirect to the page the user was on.
1265         header('Location: '. $location);
1266         exit;
1267     }
1268
1269     // -------- User clicked the "Cancel" button when editing a link.
1270     if (isset($_POST['cancel_edit']))
1271     {
1272         $id = isset($_POST['lf_id']) ? (int) escape($_POST['lf_id']) : false;
1273         if (! isset($LINKSDB[$id])) {
1274             header('Location: ?');
1275         }
1276         // If we are called from the bookmarklet, we must close the popup:
1277         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1278         $link = $LINKSDB[$id];
1279         $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
1280         // Scroll to the link which has been edited.
1281         $returnurl .= '#'. $link['shorturl'];
1282         $returnurl = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1283         header('Location: '.$returnurl); // After canceling, redirect to the page the user was on.
1284         exit;
1285     }
1286
1287     // -------- User clicked the "Delete" button when editing a link: Delete link from database.
1288     if ($targetPage == Router::$PAGE_DELETELINK)
1289     {
1290         if (! $sessionManager->checkToken($_GET['token'])) {
1291             die(t('Wrong token.'));
1292         }
1293
1294         $ids = trim($_GET['lf_linkdate']);
1295         if (strpos($ids, ' ') !== false) {
1296             // multiple, space-separated ids provided
1297             $ids = array_values(array_filter(preg_split('/\s+/', escape($ids))));
1298         } else {
1299             // only a single id provided
1300             $ids = [$ids];
1301         }
1302         // assert at least one id is given
1303         if(!count($ids)){
1304             die('no id provided');
1305         }
1306         foreach ($ids as $id) {
1307             $id = (int) escape($id);
1308             $link = $LINKSDB[$id];
1309             $pluginManager->executeHooks('delete_link', $link);
1310             unset($LINKSDB[$id]);
1311         }
1312         $LINKSDB->save($conf->get('resource.page_cache')); // save to disk
1313         $history->deleteLink($link);
1314
1315         // If we are called from the bookmarklet, we must close the popup:
1316         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1317
1318         $location = '?';
1319         if (isset($_SERVER['HTTP_REFERER'])) {
1320             // Don't redirect to where we were previously if it was a permalink or an edit_link, because it would 404.
1321             $location = generateLocation(
1322                     $_SERVER['HTTP_REFERER'],
1323                     $_SERVER['HTTP_HOST'],
1324                     ['delete_link', 'edit_link', $link['shorturl']]
1325             );
1326         }
1327
1328         header('Location: ' . $location); // After deleting the link, redirect to appropriate location
1329         exit;
1330     }
1331
1332     // -------- User clicked the "EDIT" button on a link: Display link edit form.
1333     if (isset($_GET['edit_link']))
1334     {
1335         $id = (int) escape($_GET['edit_link']);
1336         $link = $LINKSDB[$id];  // Read database
1337         if (!$link) { header('Location: ?'); exit; } // Link not found in database.
1338         $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1339         $data = array(
1340             'link' => $link,
1341             'link_is_new' => false,
1342             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1343             'tags' => $LINKSDB->linksCountPerTag(),
1344         );
1345         $pluginManager->executeHooks('render_editlink', $data);
1346
1347         foreach ($data as $key => $value) {
1348             $PAGE->assign($key, $value);
1349         }
1350
1351         $PAGE->assign('pagetitle', t('Edit') .' '. t('Shaare') .' - '. $conf->get('general.title', 'Shaarli'));
1352         $PAGE->renderPage('editlink');
1353         exit;
1354     }
1355
1356     // -------- User want to post a new link: Display link edit form.
1357     if (isset($_GET['post'])) {
1358         $url = cleanup_url($_GET['post']);
1359
1360         $link_is_new = false;
1361         // Check if URL is not already in database (in this case, we will edit the existing link)
1362         $link = $LINKSDB->getLinkFromUrl($url);
1363         if (! $link)
1364         {
1365             $link_is_new = true;
1366             $linkdate = strval(date(LinkDB::LINK_DATE_FORMAT));
1367             // Get title if it was provided in URL (by the bookmarklet).
1368             $title = empty($_GET['title']) ? '' : escape($_GET['title']);
1369             // Get description if it was provided in URL (by the bookmarklet). [Bronco added that]
1370             $description = empty($_GET['description']) ? '' : escape($_GET['description']);
1371             $tags = empty($_GET['tags']) ? '' : escape($_GET['tags']);
1372             $private = !empty($_GET['private']) && $_GET['private'] === "1" ? 1 : 0;
1373             // If this is an HTTP(S) link, we try go get the page to extract the title (otherwise we will to straight to the edit form.)
1374             if (empty($title) && strpos(get_url_scheme($url), 'http') !== false) {
1375                 // Short timeout to keep the application responsive
1376                 // The callback will fill $charset and $title with data from the downloaded page.
1377                 get_http_response(
1378                     $url,
1379                     $conf->get('general.download_max_size', 4194304),
1380                     $conf->get('general.download_timeout', 30),
1381                     get_curl_download_callback($charset, $title)
1382                 );
1383                 if (! empty($title) && strtolower($charset) != 'utf-8') {
1384                     $title = mb_convert_encoding($title, 'utf-8', $charset);
1385                 }
1386             }
1387
1388             if ($url == '') {
1389                 $url = '?' . smallHash($linkdate . $LINKSDB->getNextId());
1390                 $title = $conf->get('general.default_note_title', t('Note: '));
1391             }
1392             $url = escape($url);
1393             $title = escape($title);
1394
1395             $link = array(
1396                 'linkdate' => $linkdate,
1397                 'title' => $title,
1398                 'url' => $url,
1399                 'description' => $description,
1400                 'tags' => $tags,
1401                 'private' => $private,
1402             );
1403         } else {
1404             $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1405         }
1406
1407         $data = array(
1408             'link' => $link,
1409             'link_is_new' => $link_is_new,
1410             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1411             'source' => (isset($_GET['source']) ? $_GET['source'] : ''),
1412             'tags' => $LINKSDB->linksCountPerTag(),
1413             'default_private_links' => $conf->get('privacy.default_private_links', false),
1414         );
1415         $pluginManager->executeHooks('render_editlink', $data);
1416
1417         foreach ($data as $key => $value) {
1418             $PAGE->assign($key, $value);
1419         }
1420
1421         $PAGE->assign('pagetitle', t('Shaare') .' - '. $conf->get('general.title', 'Shaarli'));
1422         $PAGE->renderPage('editlink');
1423         exit;
1424     }
1425
1426     if ($targetPage == Router::$PAGE_EXPORT) {
1427         // Export links as a Netscape Bookmarks file
1428
1429         if (empty($_GET['selection'])) {
1430             $PAGE->assign('pagetitle', t('Export') .' - '. $conf->get('general.title', 'Shaarli'));
1431             $PAGE->renderPage('export');
1432             exit;
1433         }
1434
1435         // export as bookmarks_(all|private|public)_YYYYmmdd_HHMMSS.html
1436         $selection = $_GET['selection'];
1437         if (isset($_GET['prepend_note_url'])) {
1438             $prependNoteUrl = $_GET['prepend_note_url'];
1439         } else {
1440             $prependNoteUrl = false;
1441         }
1442
1443         try {
1444             $PAGE->assign(
1445                 'links',
1446                 NetscapeBookmarkUtils::filterAndFormat(
1447                     $LINKSDB,
1448                     $selection,
1449                     $prependNoteUrl,
1450                     index_url($_SERVER)
1451                 )
1452             );
1453         } catch (Exception $exc) {
1454             header('Content-Type: text/plain; charset=utf-8');
1455             echo $exc->getMessage();
1456             exit;
1457         }
1458         $now = new DateTime();
1459         header('Content-Type: text/html; charset=utf-8');
1460         header(
1461             'Content-disposition: attachment; filename=bookmarks_'
1462            .$selection.'_'.$now->format(LinkDB::LINK_DATE_FORMAT).'.html'
1463         );
1464         $PAGE->assign('date', $now->format(DateTime::RFC822));
1465         $PAGE->assign('eol', PHP_EOL);
1466         $PAGE->assign('selection', $selection);
1467         $PAGE->renderPage('export.bookmarks');
1468         exit;
1469     }
1470
1471     if ($targetPage == Router::$PAGE_IMPORT) {
1472         // Upload a Netscape bookmark dump to import its contents
1473
1474         if (! isset($_POST['token']) || ! isset($_FILES['filetoupload'])) {
1475             // Show import dialog
1476             $PAGE->assign(
1477                 'maxfilesize',
1478                 get_max_upload_size(
1479                     ini_get('post_max_size'),
1480                     ini_get('upload_max_filesize'),
1481                     false
1482                 )
1483             );
1484             $PAGE->assign(
1485                 'maxfilesizeHuman',
1486                 get_max_upload_size(
1487                     ini_get('post_max_size'),
1488                     ini_get('upload_max_filesize'),
1489                     true
1490                 )
1491             );
1492             $PAGE->assign('pagetitle', t('Import') .' - '. $conf->get('general.title', 'Shaarli'));
1493             $PAGE->renderPage('import');
1494             exit;
1495         }
1496
1497         // Import bookmarks from an uploaded file
1498         if (isset($_FILES['filetoupload']['size']) && $_FILES['filetoupload']['size'] == 0) {
1499             // The file is too big or some form field may be missing.
1500             $msg = sprintf(
1501                 t(
1502                     'The file you are trying to upload is probably bigger than what this webserver can accept'
1503                     .' (%s). Please upload in smaller chunks.'
1504                 ),
1505                 get_max_upload_size(ini_get('post_max_size'), ini_get('upload_max_filesize'))
1506             );
1507             echo '<script>alert("'. $msg .'");document.location=\'?do='.Router::$PAGE_IMPORT .'\';</script>';
1508             exit;
1509         }
1510         if (! $sessionManager->checkToken($_POST['token'])) {
1511             die('Wrong token.');
1512         }
1513         $status = NetscapeBookmarkUtils::import(
1514             $_POST,
1515             $_FILES,
1516             $LINKSDB,
1517             $conf,
1518             $history
1519         );
1520         echo '<script>alert("'.$status.'");document.location=\'?do='
1521              .Router::$PAGE_IMPORT .'\';</script>';
1522         exit;
1523     }
1524
1525     // Plugin administration page
1526     if ($targetPage == Router::$PAGE_PLUGINSADMIN) {
1527         $pluginMeta = $pluginManager->getPluginsMeta();
1528
1529         // Split plugins into 2 arrays: ordered enabled plugins and disabled.
1530         $enabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] !== false; });
1531         // Load parameters.
1532         $enabledPlugins = load_plugin_parameter_values($enabledPlugins, $conf->get('plugins', array()));
1533         uasort(
1534             $enabledPlugins,
1535             function($a, $b) { return $a['order'] - $b['order']; }
1536         );
1537         $disabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] === false; });
1538
1539         $PAGE->assign('enabledPlugins', $enabledPlugins);
1540         $PAGE->assign('disabledPlugins', $disabledPlugins);
1541         $PAGE->assign('pagetitle', t('Plugin administration') .' - '. $conf->get('general.title', 'Shaarli'));
1542         $PAGE->renderPage('pluginsadmin');
1543         exit;
1544     }
1545
1546     // Plugin administration form action
1547     if ($targetPage == Router::$PAGE_SAVE_PLUGINSADMIN) {
1548         try {
1549             if (isset($_POST['parameters_form'])) {
1550                 unset($_POST['parameters_form']);
1551                 foreach ($_POST as $param => $value) {
1552                     $conf->set('plugins.'. $param, escape($value));
1553                 }
1554             }
1555             else {
1556                 $conf->set('general.enabled_plugins', save_plugin_config($_POST));
1557             }
1558             $conf->write(isLoggedIn());
1559             $history->updateSettings();
1560         }
1561         catch (Exception $e) {
1562             error_log(
1563                 'ERROR while saving plugin configuration:.' . PHP_EOL .
1564                 $e->getMessage()
1565             );
1566
1567             // TODO: do not handle exceptions/errors in JS.
1568             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do='. Router::$PAGE_PLUGINSADMIN .'\';</script>';
1569             exit;
1570         }
1571         header('Location: ?do='. Router::$PAGE_PLUGINSADMIN);
1572         exit;
1573     }
1574
1575     // Get a fresh token
1576     if ($targetPage == Router::$GET_TOKEN) {
1577         header('Content-Type:text/plain');
1578         echo $sessionManager->generateToken($conf);
1579         exit;
1580     }
1581
1582     // -------- Otherwise, simply display search form and links:
1583     showLinkList($PAGE, $LINKSDB, $conf, $pluginManager);
1584     exit;
1585 }
1586
1587 /**
1588  * Template for the list of links (<div id="linklist">)
1589  * This function fills all the necessary fields in the $PAGE for the template 'linklist.html'
1590  *
1591  * @param pageBuilder   $PAGE          pageBuilder instance.
1592  * @param LinkDB        $LINKSDB       LinkDB instance.
1593  * @param ConfigManager $conf          Configuration Manager instance.
1594  * @param PluginManager $pluginManager Plugin Manager instance.
1595  */
1596 function buildLinkList($PAGE,$LINKSDB, $conf, $pluginManager)
1597 {
1598     // Used in templates
1599     if (isset($_GET['searchtags'])) {
1600         if (! empty($_GET['searchtags'])) {
1601             $searchtags = escape(normalize_spaces($_GET['searchtags']));
1602         } else {
1603             $searchtags = false;
1604         }
1605     } else {
1606         $searchtags = '';
1607     }
1608     $searchterm = !empty($_GET['searchterm']) ? escape(normalize_spaces($_GET['searchterm'])) : '';
1609
1610     // Smallhash filter
1611     if (! empty($_SERVER['QUERY_STRING'])
1612         && preg_match('/^[a-zA-Z0-9-_@]{6}($|&|#)/', $_SERVER['QUERY_STRING'])) {
1613         try {
1614             $linksToDisplay = $LINKSDB->filterHash($_SERVER['QUERY_STRING']);
1615         } catch (LinkNotFoundException $e) {
1616             $PAGE->render404($e->getMessage());
1617             exit;
1618         }
1619     } else {
1620         // Filter links according search parameters.
1621         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
1622         $request = [
1623             'searchtags' => $searchtags,
1624             'searchterm' => $searchterm,
1625         ];
1626         $linksToDisplay = $LINKSDB->filterSearch($request, false, $visibility, !empty($_SESSION['untaggedonly']));
1627     }
1628
1629     // ---- Handle paging.
1630     $keys = array();
1631     foreach ($linksToDisplay as $key => $value) {
1632         $keys[] = $key;
1633     }
1634
1635
1636
1637     // Select articles according to paging.
1638     $pagecount = ceil(count($keys) / $_SESSION['LINKS_PER_PAGE']);
1639     $pagecount = $pagecount == 0 ? 1 : $pagecount;
1640     $page= empty($_GET['page']) ? 1 : intval($_GET['page']);
1641     $page = $page < 1 ? 1 : $page;
1642     $page = $page > $pagecount ? $pagecount : $page;
1643     // Start index.
1644     $i = ($page-1) * $_SESSION['LINKS_PER_PAGE'];
1645     $end = $i + $_SESSION['LINKS_PER_PAGE'];
1646     $linkDisp = array();
1647     while ($i<$end && $i<count($keys))
1648     {
1649         $link = $linksToDisplay[$keys[$i]];
1650         $link['description'] = format_description(
1651             $link['description'],
1652             $conf->get('redirector.url'),
1653             $conf->get('redirector.encode_url')
1654         );
1655         $classLi =  ($i % 2) != 0 ? '' : 'publicLinkHightLight';
1656         $link['class'] = $link['private'] == 0 ? $classLi : 'private';
1657         $link['timestamp'] = $link['created']->getTimestamp();
1658         if (! empty($link['updated'])) {
1659             $link['updated_timestamp'] = $link['updated']->getTimestamp();
1660         } else {
1661             $link['updated_timestamp'] = '';
1662         }
1663         $taglist = preg_split('/\s+/', $link['tags'], -1, PREG_SPLIT_NO_EMPTY);
1664         uasort($taglist, 'strcasecmp');
1665         $link['taglist'] = $taglist;
1666         // Check for both signs of a note: starting with ? and 7 chars long.
1667         if ($link['url'][0] === '?' &&
1668             strlen($link['url']) === 7) {
1669             $link['url'] = index_url($_SERVER) . $link['url'];
1670         }
1671
1672         $linkDisp[$keys[$i]] = $link;
1673         $i++;
1674     }
1675
1676     // Compute paging navigation
1677     $searchtagsUrl = $searchtags === '' ? '' : '&searchtags=' . urlencode($searchtags);
1678     $searchtermUrl = empty($searchterm) ? '' : '&searchterm=' . urlencode($searchterm);
1679     $previous_page_url = '';
1680     if ($i != count($keys)) {
1681         $previous_page_url = '?page=' . ($page+1) . $searchtermUrl . $searchtagsUrl;
1682     }
1683     $next_page_url='';
1684     if ($page>1) {
1685         $next_page_url = '?page=' . ($page-1) . $searchtermUrl . $searchtagsUrl;
1686     }
1687
1688     // Fill all template fields.
1689     $data = array(
1690         'previous_page_url' => $previous_page_url,
1691         'next_page_url' => $next_page_url,
1692         'page_current' => $page,
1693         'page_max' => $pagecount,
1694         'result_count' => count($linksToDisplay),
1695         'search_term' => $searchterm,
1696         'search_tags' => $searchtags,
1697         'visibility' => ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '',
1698         'redirector' => $conf->get('redirector.url'),  // Optional redirector URL.
1699         'links' => $linkDisp,
1700     );
1701
1702     // If there is only a single link, we change on-the-fly the title of the page.
1703     if (count($linksToDisplay) == 1) {
1704         $data['pagetitle'] = $linksToDisplay[$keys[0]]['title'] .' - '. $conf->get('general.title');
1705     } elseif (! empty($searchterm) || ! empty($searchtags)) {
1706         $data['pagetitle'] = t('Search: ');
1707         $data['pagetitle'] .= ! empty($searchterm) ? $searchterm .' ' : '';
1708         $bracketWrap = function ($tag) {
1709             return '['. $tag .']';
1710         };
1711         $data['pagetitle'] .= ! empty($searchtags)
1712             ? implode(' ', array_map($bracketWrap, preg_split('/\s+/', $searchtags))).' '
1713             : '';
1714         $data['pagetitle'] .= '- '. $conf->get('general.title');
1715     }
1716
1717     $pluginManager->executeHooks('render_linklist', $data, array('loggedin' => isLoggedIn()));
1718
1719     foreach ($data as $key => $value) {
1720         $PAGE->assign($key, $value);
1721     }
1722
1723     return;
1724 }
1725
1726 /**
1727  * Compute the thumbnail for a link.
1728  *
1729  * With a link to the original URL.
1730  * Understands various services (youtube.com...)
1731  * Input: $url = URL for which the thumbnail must be found.
1732  *        $href = if provided, this URL will be followed instead of $url
1733  * Returns an associative array with thumbnail attributes (src,href,width,height,style,alt)
1734  * Some of them may be missing.
1735  * Return an empty array if no thumbnail available.
1736  *
1737  * @param ConfigManager $conf Configuration Manager instance.
1738  * @param string        $url
1739  * @param string|bool   $href
1740  *
1741  * @return array
1742  */
1743 function computeThumbnail($conf, $url, $href = false)
1744 {
1745     if (!$conf->get('thumbnail.enable_thumbnails')) return array();
1746     if ($href==false) $href=$url;
1747
1748     // For most hosts, the URL of the thumbnail can be easily deduced from the URL of the link.
1749     // (e.g. http://www.youtube.com/watch?v=spVypYk4kto --->  http://img.youtube.com/vi/spVypYk4kto/default.jpg )
1750     //                                     ^^^^^^^^^^^                                 ^^^^^^^^^^^
1751     $domain = parse_url($url,PHP_URL_HOST);
1752     if ($domain=='youtube.com' || $domain=='www.youtube.com')
1753     {
1754         parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract video ID and get thumbnail
1755         if (!empty($params['v'])) return array('src'=>'https://img.youtube.com/vi/'.$params['v'].'/default.jpg',
1756                                                'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
1757     }
1758     if ($domain=='youtu.be') // Youtube short links
1759     {
1760         $path = parse_url($url,PHP_URL_PATH);
1761         return array('src'=>'https://img.youtube.com/vi'.$path.'/default.jpg',
1762                      'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
1763     }
1764     if ($domain=='pix.toile-libre.org') // pix.toile-libre.org image hosting
1765     {
1766         parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract image filename.
1767         if (!empty($params) && !empty($params['img'])) return array('src'=>'http://pix.toile-libre.org/upload/thumb/'.urlencode($params['img']),
1768                                                                     'href'=>$href,'style'=>'max-width:120px; max-height:150px','alt'=>'pix.toile-libre.org thumbnail');
1769     }
1770
1771     if ($domain=='imgur.com')
1772     {
1773         $path = parse_url($url,PHP_URL_PATH);
1774         if (startsWith($path,'/a/')) return array(); // Thumbnails for albums are not available.
1775         if (startsWith($path,'/r/')) return array('src'=>'https://i.imgur.com/'.basename($path).'s.jpg',
1776                                                   'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1777         if (startsWith($path,'/gallery/')) return array('src'=>'https://i.imgur.com'.substr($path,8).'s.jpg',
1778                                                         'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1779
1780         if (substr_count($path,'/')==1) return array('src'=>'https://i.imgur.com/'.substr($path,1).'s.jpg',
1781                                                      'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1782     }
1783     if ($domain=='i.imgur.com')
1784     {
1785         $pi = pathinfo(parse_url($url,PHP_URL_PATH));
1786         if (!empty($pi['filename'])) return array('src'=>'https://i.imgur.com/'.$pi['filename'].'s.jpg',
1787                                                   'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1788     }
1789     if ($domain=='dailymotion.com' || $domain=='www.dailymotion.com')
1790     {
1791         if (strpos($url,'dailymotion.com/video/')!==false)
1792         {
1793             $thumburl=str_replace('dailymotion.com/video/','dailymotion.com/thumbnail/video/',$url);
1794             return array('src'=>$thumburl,
1795                          'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'DailyMotion thumbnail');
1796         }
1797     }
1798     if (endsWith($domain,'.imageshack.us'))
1799     {
1800         $ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
1801         if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
1802         {
1803             $thumburl = substr($url,0,strlen($url)-strlen($ext)).'th.'.$ext;
1804             return array('src'=>$thumburl,
1805                          'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'imageshack.us thumbnail');
1806         }
1807     }
1808
1809     // Some other hosts are SLOW AS HELL and usually require an extra HTTP request to get the thumbnail URL.
1810     // So we deport the thumbnail generation in order not to slow down page generation
1811     // (and we also cache the thumbnail)
1812
1813     if (! $conf->get('thumbnail.enable_localcache')) return array(); // If local cache is disabled, no thumbnails for services which require the use a local cache.
1814
1815     if ($domain=='flickr.com' || endsWith($domain,'.flickr.com')
1816         || $domain=='vimeo.com'
1817         || $domain=='ted.com' || endsWith($domain,'.ted.com')
1818         || $domain=='xkcd.com' || endsWith($domain,'.xkcd.com')
1819     )
1820     {
1821         if ($domain=='vimeo.com')
1822         {   // Make sure this vimeo URL points to a video (/xxx... where xxx is numeric)
1823             $path = parse_url($url,PHP_URL_PATH);
1824             if (!preg_match('!/\d+.+?!',$path)) return array(); // This is not a single video URL.
1825         }
1826         if ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
1827         {   // Make sure this URL points to a single comic (/xxx... where xxx is numeric)
1828             $path = parse_url($url,PHP_URL_PATH);
1829             if (!preg_match('!/\d+.+?!',$path)) return array();
1830         }
1831         if ($domain=='ted.com' || endsWith($domain,'.ted.com'))
1832         {   // Make sure this TED URL points to a video (/talks/...)
1833             $path = parse_url($url,PHP_URL_PATH);
1834             if ("/talks/" !== substr($path,0,7)) return array(); // This is not a single video URL.
1835         }
1836         $sign = hash_hmac('sha256', $url, $conf->get('credentials.salt')); // We use the salt to sign data (it's random, secret, and specific to each installation)
1837         return array('src'=>index_url($_SERVER).'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url),
1838                      'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
1839     }
1840
1841     // For all other, we try to make a thumbnail of links ending with .jpg/jpeg/png/gif
1842     // Technically speaking, we should download ALL links and check their Content-Type to see if they are images.
1843     // But using the extension will do.
1844     $ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
1845     if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
1846     {
1847         $sign = hash_hmac('sha256', $url, $conf->get('credentials.salt')); // We use the salt to sign data (it's random, secret, and specific to each installation)
1848         return array('src'=>index_url($_SERVER).'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url),
1849                      'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
1850     }
1851     return array(); // No thumbnail.
1852
1853 }
1854
1855
1856 // Returns the HTML code to display a thumbnail for a link
1857 // with a link to the original URL.
1858 // Understands various services (youtube.com...)
1859 // Input: $url = URL for which the thumbnail must be found.
1860 //        $href = if provided, this URL will be followed instead of $url
1861 // Returns '' if no thumbnail available.
1862 function thumbnail($url,$href=false)
1863 {
1864     // FIXME!
1865     global $conf;
1866     $t = computeThumbnail($conf, $url,$href);
1867     if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
1868
1869     $html='<a href="'.escape($t['href']).'"><img src="'.escape($t['src']).'"';
1870     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1871     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1872     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1873     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1874     $html.='></a>';
1875     return $html;
1876 }
1877
1878 // Returns the HTML code to display a thumbnail for a link
1879 // for the picture wall (using lazy image loading)
1880 // Understands various services (youtube.com...)
1881 // Input: $url = URL for which the thumbnail must be found.
1882 //        $href = if provided, this URL will be followed instead of $url
1883 // Returns '' if no thumbnail available.
1884 function lazyThumbnail($conf, $url,$href=false)
1885 {
1886     // FIXME!
1887     global $conf;
1888     $t = computeThumbnail($conf, $url,$href);
1889     if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
1890
1891     $html='<a href="'.escape($t['href']).'">';
1892
1893     // Lazy image
1894     $html.='<img class="b-lazy" src="#" data-src="'.escape($t['src']).'"';
1895
1896     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1897     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1898     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1899     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1900     $html.='>';
1901
1902     // No-JavaScript fallback.
1903     $html.='<noscript><img src="'.escape($t['src']).'"';
1904     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1905     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1906     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1907     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1908     $html.='></noscript></a>';
1909
1910     return $html;
1911 }
1912
1913
1914 /**
1915  * Installation
1916  * This function should NEVER be called if the file data/config.php exists.
1917  *
1918  * @param ConfigManager  $conf           Configuration Manager instance.
1919  * @param SessionManager $sessionManager SessionManager instance
1920  */
1921 function install($conf, $sessionManager) {
1922     // On free.fr host, make sure the /sessions directory exists, otherwise login will not work.
1923     if (endsWith($_SERVER['HTTP_HOST'],'.free.fr') && !is_dir($_SERVER['DOCUMENT_ROOT'].'/sessions')) mkdir($_SERVER['DOCUMENT_ROOT'].'/sessions',0705);
1924
1925
1926     // This part makes sure sessions works correctly.
1927     // (Because on some hosts, session.save_path may not be set correctly,
1928     // or we may not have write access to it.)
1929     if (isset($_GET['test_session']) && ( !isset($_SESSION) || !isset($_SESSION['session_tested']) || $_SESSION['session_tested']!='Working'))
1930     {
1931         // Step 2: Check if data in session is correct.
1932         $msg = t(
1933             '<pre>Sessions do not seem to work correctly on your server.<br>'.
1934             'Make sure the variable "session.save_path" is set correctly in your PHP config, '.
1935             'and that you have write access to it.<br>'.
1936             'It currently points to %s.<br>'.
1937             'On some browsers, accessing your server via a hostname like \'localhost\' '.
1938             'or any custom hostname without a dot causes cookie storage to fail. '.
1939             'We recommend accessing your server via it\'s IP address or Fully Qualified Domain Name.<br>'
1940         );
1941         $msg = sprintf($msg, session_save_path());
1942         echo $msg;
1943         echo '<br><a href="?">'. t('Click to try again.') .'</a></pre>';
1944         die;
1945     }
1946     if (!isset($_SESSION['session_tested']))
1947     {   // Step 1 : Try to store data in session and reload page.
1948         $_SESSION['session_tested'] = 'Working';  // Try to set a variable in session.
1949         header('Location: '.index_url($_SERVER).'?test_session');  // Redirect to check stored data.
1950     }
1951     if (isset($_GET['test_session']))
1952     {   // Step 3: Sessions are OK. Remove test parameter from URL.
1953         header('Location: '.index_url($_SERVER));
1954     }
1955
1956
1957     if (!empty($_POST['setlogin']) && !empty($_POST['setpassword']))
1958     {
1959         $tz = 'UTC';
1960         if (!empty($_POST['continent']) && !empty($_POST['city'])
1961             && isTimeZoneValid($_POST['continent'], $_POST['city'])
1962         ) {
1963             $tz = $_POST['continent'].'/'.$_POST['city'];
1964         }
1965         $conf->set('general.timezone', $tz);
1966         $login = $_POST['setlogin'];
1967         $conf->set('credentials.login', $login);
1968         $salt = sha1(uniqid('', true) .'_'. mt_rand());
1969         $conf->set('credentials.salt', $salt);
1970         $conf->set('credentials.hash', sha1($_POST['setpassword'] . $login . $salt));
1971         if (!empty($_POST['title'])) {
1972             $conf->set('general.title', escape($_POST['title']));
1973         } else {
1974             $conf->set('general.title', 'Shared links on '.escape(index_url($_SERVER)));
1975         }
1976         $conf->set('translation.language', escape($_POST['language']));
1977         $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1978         $conf->set('api.enabled', !empty($_POST['enableApi']));
1979         $conf->set(
1980             'api.secret',
1981             generate_api_secret(
1982                 $conf->get('credentials.login'),
1983                 $conf->get('credentials.salt')
1984             )
1985         );
1986         try {
1987             // Everything is ok, let's create config file.
1988             $conf->write(isLoggedIn());
1989         }
1990         catch(Exception $e) {
1991             error_log(
1992                     'ERROR while writing config file after installation.' . PHP_EOL .
1993                     $e->getMessage()
1994                 );
1995
1996             // TODO: do not handle exceptions/errors in JS.
1997             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?\';</script>';
1998             exit;
1999         }
2000         echo '<script>alert("Shaarli is now configured. Please enter your login/password and start shaaring your links!");document.location=\'?do=login\';</script>';
2001         exit;
2002     }
2003
2004     $PAGE = new PageBuilder($conf, null, $sessionManager->generateToken());
2005     list($continents, $cities) = generateTimeZoneData(timezone_identifiers_list(), date_default_timezone_get());
2006     $PAGE->assign('continents', $continents);
2007     $PAGE->assign('cities', $cities);
2008     $PAGE->assign('languages', Languages::getAvailableLanguages());
2009     $PAGE->renderPage('install');
2010     exit;
2011 }
2012
2013 /**
2014  * Because some f*cking services like flickr require an extra HTTP request to get the thumbnail URL,
2015  * I have deported the thumbnail URL code generation here, otherwise this would slow down page generation.
2016  * The following function takes the URL a link (e.g. a flickr page) and return the proper thumbnail.
2017  * This function is called by passing the URL:
2018  * http://mywebsite.com/shaarli/?do=genthumbnail&hmac=[HMAC]&url=[URL]
2019  * [URL] is the URL of the link (e.g. a flickr page)
2020  * [HMAC] is the signature for the [URL] (so that these URL cannot be forged).
2021  * The function below will fetch the image from the webservice and store it in the cache.
2022  *
2023  * @param ConfigManager $conf Configuration Manager instance,
2024  */
2025 function genThumbnail($conf)
2026 {
2027     // Make sure the parameters in the URL were generated by us.
2028     $sign = hash_hmac('sha256', $_GET['url'], $conf->get('credentials.salt'));
2029     if ($sign!=$_GET['hmac']) die('Naughty boy!');
2030
2031     $cacheDir = $conf->get('resource.thumbnails_cache', 'cache');
2032     // Let's see if we don't already have the image for this URL in the cache.
2033     $thumbname=hash('sha1',$_GET['url']).'.jpg';
2034     if (is_file($cacheDir .'/'. $thumbname))
2035     {   // We have the thumbnail, just serve it:
2036         header('Content-Type: image/jpeg');
2037         echo file_get_contents($cacheDir .'/'. $thumbname);
2038         return;
2039     }
2040     // We may also serve a blank image (if service did not respond)
2041     $blankname=hash('sha1',$_GET['url']).'.gif';
2042     if (is_file($cacheDir .'/'. $blankname))
2043     {
2044         header('Content-Type: image/gif');
2045         echo file_get_contents($cacheDir .'/'. $blankname);
2046         return;
2047     }
2048
2049     // Otherwise, generate the thumbnail.
2050     $url = $_GET['url'];
2051     $domain = parse_url($url,PHP_URL_HOST);
2052
2053     if ($domain=='flickr.com' || endsWith($domain,'.flickr.com'))
2054     {
2055         // Crude replacement to handle new flickr domain policy (They prefer www. now)
2056         $url = str_replace('http://flickr.com/','http://www.flickr.com/',$url);
2057
2058         // Is this a link to an image, or to a flickr page ?
2059         $imageurl='';
2060         if (endsWith(parse_url($url, PHP_URL_PATH), '.jpg'))
2061         {  // This is a direct link to an image. e.g. http://farm1.staticflickr.com/5/5921913_ac83ed27bd_o.jpg
2062             preg_match('!(http://farm\d+\.staticflickr\.com/\d+/\d+_\w+_)\w.jpg!',$url,$matches);
2063             if (!empty($matches[1])) $imageurl=$matches[1].'m.jpg';
2064         }
2065         else // This is a flickr page (html)
2066         {
2067             // Get the flickr html page.
2068             list($headers, $content) = get_http_response($url, 20);
2069             if (strpos($headers[0], '200 OK') !== false)
2070             {
2071                 // flickr now nicely provides the URL of the thumbnail in each flickr page.
2072                 preg_match('!<link rel=\"image_src\" href=\"(.+?)\"!', $content, $matches);
2073                 if (!empty($matches[1])) $imageurl=$matches[1];
2074
2075                 // In albums (and some other pages), the link rel="image_src" is not provided,
2076                 // but flickr provides:
2077                 // <meta property="og:image" content="http://farm4.staticflickr.com/3398/3239339068_25d13535ff_z.jpg" />
2078                 if ($imageurl=='')
2079                 {
2080                     preg_match('!<meta property=\"og:image\" content=\"(.+?)\"!', $content, $matches);
2081                     if (!empty($matches[1])) $imageurl=$matches[1];
2082                 }
2083             }
2084         }
2085
2086         if ($imageurl!='')
2087         {   // Let's download the image.
2088             // Image is 240x120, so 10 seconds to download should be enough.
2089             list($headers, $content) = get_http_response($imageurl, 10);
2090             if (strpos($headers[0], '200 OK') !== false) {
2091                 // Save image to cache.
2092                 file_put_contents($cacheDir .'/'. $thumbname, $content);
2093                 header('Content-Type: image/jpeg');
2094                 echo $content;
2095                 return;
2096             }
2097         }
2098     }
2099
2100     elseif ($domain=='vimeo.com' )
2101     {
2102         // This is more complex: we have to perform a HTTP request, then parse the result.
2103         // Maybe we should deport this to JavaScript ? Example: http://stackoverflow.com/questions/1361149/get-img-thumbnails-from-vimeo/4285098#4285098
2104         $vid = substr(parse_url($url,PHP_URL_PATH),1);
2105         list($headers, $content) = get_http_response('https://vimeo.com/api/v2/video/'.escape($vid).'.php', 5);
2106         if (strpos($headers[0], '200 OK') !== false) {
2107             $t = unserialize($content);
2108             $imageurl = $t[0]['thumbnail_medium'];
2109             // Then we download the image and serve it to our client.
2110             list($headers, $content) = get_http_response($imageurl, 10);
2111             if (strpos($headers[0], '200 OK') !== false) {
2112                 // Save image to cache.
2113                 file_put_contents($cacheDir .'/'. $thumbname, $content);
2114                 header('Content-Type: image/jpeg');
2115                 echo $content;
2116                 return;
2117             }
2118         }
2119     }
2120
2121     elseif ($domain=='ted.com' || endsWith($domain,'.ted.com'))
2122     {
2123         // The thumbnail for TED talks is located in the <link rel="image_src" [...]> tag on that page
2124         // http://www.ted.com/talks/mikko_hypponen_fighting_viruses_defending_the_net.html
2125         // <link rel="image_src" href="http://images.ted.com/images/ted/28bced335898ba54d4441809c5b1112ffaf36781_389x292.jpg" />
2126         list($headers, $content) = get_http_response($url, 5);
2127         if (strpos($headers[0], '200 OK') !== false) {
2128             // Extract the link to the thumbnail
2129             preg_match('!link rel="image_src" href="(http://images.ted.com/images/ted/.+_\d+x\d+\.jpg)"!', $content, $matches);
2130             if (!empty($matches[1]))
2131             {   // Let's download the image.
2132                 $imageurl=$matches[1];
2133                 // No control on image size, so wait long enough
2134                 list($headers, $content) = get_http_response($imageurl, 20);
2135                 if (strpos($headers[0], '200 OK') !== false) {
2136                     $filepath = $cacheDir .'/'. $thumbname;
2137                     file_put_contents($filepath, $content); // Save image to cache.
2138                     if (resizeImage($filepath))
2139                     {
2140                         header('Content-Type: image/jpeg');
2141                         echo file_get_contents($filepath);
2142                         return;
2143                     }
2144                 }
2145             }
2146         }
2147     }
2148
2149     elseif ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
2150     {
2151         // There is no thumbnail available for xkcd comics, so download the whole image and resize it.
2152         // http://xkcd.com/327/
2153         // <img src="http://imgs.xkcd.com/comics/exploits_of_a_mom.png" title="<BLABLA>" alt="<BLABLA>" />
2154         list($headers, $content) = get_http_response($url, 5);
2155         if (strpos($headers[0], '200 OK') !== false) {
2156             // Extract the link to the thumbnail
2157             preg_match('!<img src="(http://imgs.xkcd.com/comics/.*)" title="[^s]!', $content, $matches);
2158             if (!empty($matches[1]))
2159             {   // Let's download the image.
2160                 $imageurl=$matches[1];
2161                 // No control on image size, so wait long enough
2162                 list($headers, $content) = get_http_response($imageurl, 20);
2163                 if (strpos($headers[0], '200 OK') !== false) {
2164                     $filepath = $cacheDir.'/'.$thumbname;
2165                     // Save image to cache.
2166                     file_put_contents($filepath, $content);
2167                     if (resizeImage($filepath))
2168                     {
2169                         header('Content-Type: image/jpeg');
2170                         echo file_get_contents($filepath);
2171                         return;
2172                     }
2173                 }
2174             }
2175         }
2176     }
2177
2178     else
2179     {
2180         // For all other domains, we try to download the image and make a thumbnail.
2181         // We allow 30 seconds max to download (and downloads are limited to 4 Mb)
2182         list($headers, $content) = get_http_response($url, 30);
2183         if (strpos($headers[0], '200 OK') !== false) {
2184             $filepath = $cacheDir .'/'.$thumbname;
2185             // Save image to cache.
2186             file_put_contents($filepath, $content);
2187             if (resizeImage($filepath))
2188             {
2189                 header('Content-Type: image/jpeg');
2190                 echo file_get_contents($filepath);
2191                 return;
2192             }
2193         }
2194     }
2195
2196
2197     // Otherwise, return an empty image (8x8 transparent gif)
2198     $blankgif = base64_decode('R0lGODlhCAAIAIAAAP///////yH5BAEKAAEALAAAAAAIAAgAAAIHjI+py+1dAAA7');
2199     // Also put something in cache so that this URL is not requested twice.
2200     file_put_contents($cacheDir .'/'. $blankname, $blankgif);
2201     header('Content-Type: image/gif');
2202     echo $blankgif;
2203 }
2204
2205 // Make a thumbnail of the image (to width: 120 pixels)
2206 // Returns true if success, false otherwise.
2207 function resizeImage($filepath)
2208 {
2209     if (!function_exists('imagecreatefromjpeg')) return false; // GD not present: no thumbnail possible.
2210
2211     // Trick: some stupid people rename GIF as JPEG... or else.
2212     // So we really try to open each image type whatever the extension is.
2213     $header=file_get_contents($filepath,false,NULL,0,256); // Read first 256 bytes and try to sniff file type.
2214     $im=false;
2215     $i=strpos($header,'GIF8'); if (($i!==false) && ($i==0)) $im = imagecreatefromgif($filepath); // Well this is crude, but it should be enough.
2216     $i=strpos($header,'PNG'); if (($i!==false) && ($i==1)) $im = imagecreatefrompng($filepath);
2217     $i=strpos($header,'JFIF'); if ($i!==false) $im = imagecreatefromjpeg($filepath);
2218     if (!$im) return false;  // Unable to open image (corrupted or not an image)
2219     $w = imagesx($im);
2220     $h = imagesy($im);
2221     $ystart = 0; $yheight=$h;
2222     if ($h>$w) { $ystart= ($h/2)-($w/2); $yheight=$w/2; }
2223     $nw = 120;   // Desired width
2224     $nh = min(floor(($h*$nw)/$w),120); // Compute new width/height, but maximum 120 pixels height.
2225     // Resize image:
2226     $im2 = imagecreatetruecolor($nw,$nh);
2227     imagecopyresampled($im2, $im, 0, 0, 0, $ystart, $nw, $nh, $w, $yheight);
2228     imageinterlace($im2,true); // For progressive JPEG.
2229     $tempname=$filepath.'_TEMP.jpg';
2230     imagejpeg($im2, $tempname, 90);
2231     imagedestroy($im);
2232     imagedestroy($im2);
2233     unlink($filepath);
2234     rename($tempname,$filepath);  // Overwrite original picture with thumbnail.
2235     return true;
2236 }
2237
2238 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=genthumbnail')) { genThumbnail($conf); exit; }  // Thumbnail generation/cache does not need the link database.
2239 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=dailyrss')) { showDailyRSS($conf); exit; }
2240 if (!isset($_SESSION['LINKS_PER_PAGE'])) {
2241     $_SESSION['LINKS_PER_PAGE'] = $conf->get('general.links_per_page', 20);
2242 }
2243
2244 try {
2245     $history = new History($conf->get('resource.history'));
2246 } catch(Exception $e) {
2247     die($e->getMessage());
2248 }
2249
2250 $linkDb = new LinkDB(
2251     $conf->get('resource.datastore'),
2252     isLoggedIn(),
2253     $conf->get('privacy.hide_public_links'),
2254     $conf->get('redirector.url'),
2255     $conf->get('redirector.encode_url')
2256 );
2257
2258 $container = new \Slim\Container();
2259 $container['conf'] = $conf;
2260 $container['plugins'] = $pluginManager;
2261 $container['history'] = $history;
2262 $app = new \Slim\App($container);
2263
2264 // REST API routes
2265 $app->group('/api/v1', function() {
2266     $this->get('/info', '\Shaarli\Api\Controllers\Info:getInfo')->setName('getInfo');
2267     $this->get('/links', '\Shaarli\Api\Controllers\Links:getLinks')->setName('getLinks');
2268     $this->get('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:getLink')->setName('getLink');
2269     $this->post('/links', '\Shaarli\Api\Controllers\Links:postLink')->setName('postLink');
2270     $this->put('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:putLink')->setName('putLink');
2271     $this->delete('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:deleteLink')->setName('deleteLink');
2272     $this->get('/history', '\Shaarli\Api\Controllers\History:getHistory')->setName('getHistory');
2273 })->add('\Shaarli\Api\ApiMiddleware');
2274
2275 $response = $app->run(true);
2276 // Hack to make Slim and Shaarli router work together:
2277 // If a Slim route isn't found and NOT API call, we call renderPage().
2278 if ($response->getStatusCode() == 404 && strpos($_SERVER['REQUEST_URI'], '/api/v1') === false) {
2279     // We use UTF-8 for proper international characters handling.
2280     header('Content-Type: text/html; charset=utf-8');
2281     renderPage($conf, $pluginManager, $linkDb, $history, $sessionManager, $loginManager);
2282 } else {
2283     $app->respond($response);
2284 }