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