10 files changed, 160 insertions, 105 deletions

diff --git a/application/front/controller/visitor/BookmarkListController.php b/application/front/controller/visitor/BookmarkListController.php
index 18368751..fe8231be 100644
--- a/application/front/controller/visitor/BookmarkListController.php
+++ b/application/front/controller/visitor/BookmarkListController.php
@@ -35,7 +35,8 @@ class BookmarkListController extends ShaarliVisitorController
         $formatter->addContextData('base_path', $this->container->basePath);
 
         $searchTags = normalize_spaces($request->getParam('searchtags') ?? '');
-        $searchTerm = escape(normalize_spaces($request->getParam('searchterm') ?? ''));;
+        $searchTerm = escape(normalize_spaces($request->getParam('searchterm') ?? ''));
+        ;
 
         // Filter bookmarks according search parameters.
         $visibility = $this->container->sessionManager->getSessionParameter('visibility');
@@ -95,6 +96,10 @@ class BookmarkListController extends ShaarliVisitorController
             $next_page_url = '?page=' . ($page - 1) . $searchtermUrl . $searchtagsUrl;
         }
 
+        $tagsSeparator = $this->container->conf->get('general.tags_separator', ' ');
+        $searchTagsUrlEncoded = array_map('urlencode', tags_str2array($searchTags, $tagsSeparator));
+        $searchTags = !empty($searchTags) ? trim($searchTags, $tagsSeparator) . $tagsSeparator : '';
+
         // Fill all template fields.
         $data = array_merge(
             $this->initializeTemplateVars(),
@@ -106,7 +111,7 @@ class BookmarkListController extends ShaarliVisitorController
                 'result_count' => count($linksToDisplay),
                 'search_term' => escape($searchTerm),
                 'search_tags' => escape($searchTags),
-                'search_tags_url' => array_map('urlencode', explode(' ', $searchTags)),
+                'search_tags_url' => $searchTagsUrlEncoded,
                 'visibility' => $visibility,
                 'links' => $linkDisp,
             ]
@@ -119,8 +124,9 @@ class BookmarkListController extends ShaarliVisitorController
                 return '[' . $tag . ']';
             };
             $data['pagetitle'] .= ! empty($searchTags)
-                ? implode(' ', array_map($bracketWrap, preg_split('/\s+/', $searchTags))) . ' '
-                : '';
+                ? implode(' ', array_map($bracketWrap, tags_str2array($searchTags, $tagsSeparator))) . ' '
+                : ''
+            ;
             $data['pagetitle'] .= '- ';
         }
 
@@ -137,8 +143,10 @@ class BookmarkListController extends ShaarliVisitorController
      */
     public function permalink(Request $request, Response $response, array $args): Response
     {
+        $privateKey = $request->getParam('key');
+
         try {
-            $bookmark = $this->container->bookmarkService->findByHash($args['hash']);
+            $bookmark = $this->container->bookmarkService->findByHash($args['hash'], $privateKey);
         } catch (BookmarkNotFoundException $e) {
             $this->assignView('error_message', $e->getMessage());
 
@@ -153,7 +161,7 @@ class BookmarkListController extends ShaarliVisitorController
         $data = array_merge(
             $this->initializeTemplateVars(),
             [
-                'pagetitle' => $bookmark->getTitle() .' - '. $this->container->conf->get('general.title', 'Shaarli'),
+                'pagetitle' => $bookmark->getTitle() . ' - ' . $this->container->conf->get('general.title', 'Shaarli'),
                 'links' => [$formatter->format($bookmark)],
             ]
         );
@@ -169,19 +177,25 @@ class BookmarkListController extends ShaarliVisitorController
      */
     protected function updateThumbnail(Bookmark $bookmark, bool $writeDatastore = true): bool
     {
-        // Logged in, thumbnails enabled, not a note, is HTTP
-        // and (never retrieved yet or no valid cache file)
-        if ($this->container->loginManager->isLoggedIn()
-            && $this->container->conf->get('thumbnails.mode', Thumbnailer::MODE_NONE) !== Thumbnailer::MODE_NONE
-            && false !== $bookmark->getThumbnail()
-            && !$bookmark->isNote()
-            && (null === $bookmark->getThumbnail() || !is_file($bookmark->getThumbnail()))
-            && startsWith(strtolower($bookmark->getUrl()), 'http')
-        ) {
-            $bookmark->setThumbnail($this->container->thumbnailer->get($bookmark->getUrl()));
-            $this->container->bookmarkService->set($bookmark, $writeDatastore);
-
-            return true;
+        if (false === $this->container->loginManager->isLoggedIn()) {
+            return false;
+        }
+
+        // If thumbnail should be updated, we reset it to null
+        if ($bookmark->shouldUpdateThumbnail()) {
+            $bookmark->setThumbnail(null);
+
+            // Requires an update, not async retrieval, thumbnails enabled
+            if (
+                $bookmark->shouldUpdateThumbnail()
+                && true !== $this->container->conf->get('general.enable_async_metadata', true)
+                && $this->container->conf->get('thumbnails.mode', Thumbnailer::MODE_NONE) !== Thumbnailer::MODE_NONE
+            ) {
+                $bookmark->setThumbnail($this->container->thumbnailer->get($bookmark->getUrl()));
+                $this->container->bookmarkService->set($bookmark, $writeDatastore);
+
+                return true;
+            }
         }
 
         return false;
@@ -198,6 +212,7 @@ class BookmarkListController extends ShaarliVisitorController
             'page_max' => '',
             'search_tags' => '',
             'result_count' => '',
+            'async_metadata' => $this->container->conf->get('general.enable_async_metadata', true)
         ];
     }
 
diff --git a/application/front/controller/visitor/DailyController.php b/application/front/controller/visitor/DailyController.php
index 07617cf1..29492a5f 100644
--- a/application/front/controller/visitor/DailyController.php
+++ b/application/front/controller/visitor/DailyController.php
@@ -5,8 +5,8 @@ declare(strict_types=1);
 namespace Shaarli\Front\Controller\Visitor;
 
 use DateTime;
-use DateTimeImmutable;
 use Shaarli\Bookmark\Bookmark;
+use Shaarli\Helper\DailyPageHelper;
 use Shaarli\Render\TemplatePage;
 use Slim\Http\Request;
 use Slim\Http\Response;
@@ -26,32 +26,20 @@ class DailyController extends ShaarliVisitorController
      */
     public function index(Request $request, Response $response): Response
     {
-        $day = $request->getQueryParam('day') ?? date('Ymd');
-
-        $availableDates = $this->container->bookmarkService->days();
-        $nbAvailableDates = count($availableDates);
-        $index = array_search($day, $availableDates);
-
-        if ($index === false) {
-            // no bookmarks for day, but at least one day with bookmarks
-            $day = $availableDates[$nbAvailableDates - 1] ?? $day;
-            $previousDay = $availableDates[$nbAvailableDates - 2] ?? '';
-        } else {
-            $previousDay = $availableDates[$index - 1] ?? '';
-            $nextDay = $availableDates[$index + 1] ?? '';
-        }
-
-        if ($day === date('Ymd')) {
-            $this->assignView('dayDesc', t('Today'));
-        } elseif ($day === date('Ymd', strtotime('-1 days'))) {
-            $this->assignView('dayDesc', t('Yesterday'));
-        }
-
-        try {
-            $linksToDisplay = $this->container->bookmarkService->filterDay($day);
-        } catch (\Exception $exc) {
-            $linksToDisplay = [];
-        }
+        $type = DailyPageHelper::extractRequestedType($request);
+        $format = DailyPageHelper::getFormatByType($type);
+        $latestBookmark = $this->container->bookmarkService->getLatest();
+        $dateTime = DailyPageHelper::extractRequestedDateTime($type, $request->getQueryParam($type), $latestBookmark);
+        $start = DailyPageHelper::getStartDateTimeByType($type, $dateTime);
+        $end = DailyPageHelper::getEndDateTimeByType($type, $dateTime);
+        $dailyDesc = DailyPageHelper::getDescriptionByType($type, $dateTime);
+
+        $linksToDisplay = $this->container->bookmarkService->findByDate(
+            $start,
+            $end,
+            $previousDay,
+            $nextDay
+        );
 
         $formatter = $this->container->formatterFactory->getFormatter();
         $formatter->addContextData('base_path', $this->container->basePath);
@@ -63,13 +51,15 @@ class DailyController extends ShaarliVisitorController
             $linksToDisplay[$key]['description'] = $bookmark->getDescription();
         }
 
-        $dayDate = DateTime::createFromFormat(Bookmark::LINK_DATE_FORMAT, $day.'_000000');
         $data = [
             'linksToDisplay' => $linksToDisplay,
-            'day' => $dayDate->getTimestamp(),
-            'dayDate' => $dayDate,
-            'previousday' => $previousDay ?? '',
-            'nextday' => $nextDay ?? '',
+            'dayDate' => $start,
+            'day' => $start->getTimestamp(),
+            'previousday' => $previousDay ? $previousDay->format($format) : '',
+            'nextday' => $nextDay ? $nextDay->format($format) : '',
+            'dayDesc' => $dailyDesc,
+            'type' => $type,
+            'localizedType' => $this->translateType($type),
         ];
 
         // Hooks are called before column construction so that plugins don't have to deal with columns.
@@ -82,7 +72,7 @@ class DailyController extends ShaarliVisitorController
         $mainTitle = $this->container->conf->get('general.title', 'Shaarli');
         $this->assignView(
             'pagetitle',
-            t('Daily') .' - '. format_date($dayDate, false) . ' - ' . $mainTitle
+            $data['localizedType'] . ' - ' . $data['dayDesc'] . ' - ' . $mainTitle
         );
 
         return $response->write($this->render(TemplatePage::DAILY));
@@ -96,9 +86,11 @@ class DailyController extends ShaarliVisitorController
     public function rss(Request $request, Response $response): Response
     {
         $response = $response->withHeader('Content-Type', 'application/rss+xml; charset=utf-8');
+        $type = DailyPageHelper::extractRequestedType($request);
+        $cacheDuration = DailyPageHelper::getCacheDatePeriodByType($type);
 
         $pageUrl = page_url($this->container->environment);
-        $cache = $this->container->pageCacheManager->getCachePage($pageUrl);
+        $cache = $this->container->pageCacheManager->getCachePage($pageUrl, $cacheDuration);
 
         $cached = $cache->cachedVersion();
         if (!empty($cached)) {
@@ -106,11 +98,13 @@ class DailyController extends ShaarliVisitorController
         }
 
         $days = [];
+        $format = DailyPageHelper::getFormatByType($type);
+        $length = DailyPageHelper::getRssLengthByType($type);
         foreach ($this->container->bookmarkService->search() as $bookmark) {
-            $day = $bookmark->getCreated()->format('Ymd');
+            $day = $bookmark->getCreated()->format($format);
 
             // Stop iterating after DAILY_RSS_NB_DAYS entries
-            if (count($days) === static::$DAILY_RSS_NB_DAYS && !isset($days[$day])) {
+            if (count($days) === $length && !isset($days[$day])) {
                 break;
             }
 
@@ -127,12 +121,19 @@ class DailyController extends ShaarliVisitorController
 
         /** @var Bookmark[] $bookmarks */
         foreach ($days as $day => $bookmarks) {
-            $dayDatetime = DateTimeImmutable::createFromFormat(Bookmark::LINK_DATE_FORMAT, $day.'_000000');
+            $dayDateTime = DailyPageHelper::extractRequestedDateTime($type, (string) $day);
+            $endDateTime = DailyPageHelper::getEndDateTimeByType($type, $dayDateTime);
+
+            // We only want the RSS entry to be published when the period is over.
+            if (new DateTime() < $endDateTime) {
+                continue;
+            }
+
             $dataPerDay[$day] = [
-                'date' => $dayDatetime,
-                'date_rss' => $dayDatetime->format(DateTime::RSS),
-                'date_human' => format_date($dayDatetime, false, true),
-                'absolute_url' => $indexUrl . 'daily?day=' . $day,
+                'date' => $endDateTime,
+                'date_rss' => $endDateTime->format(DateTime::RSS),
+                'date_human' => DailyPageHelper::getDescriptionByType($type, $dayDateTime, false),
+                'absolute_url' => $indexUrl . 'daily?' . $type . '=' . $day,
                 'links' => [],
             ];
 
@@ -141,16 +142,20 @@ class DailyController extends ShaarliVisitorController
 
                 // Make permalink URL absolute
                 if ($bookmark->isNote()) {
-                    $dataPerDay[$day]['links'][$key]['url'] = $indexUrl . $bookmark->getUrl();
+                    $dataPerDay[$day]['links'][$key]['url'] = rtrim($indexUrl, '/') . $bookmark->getUrl();
                 }
             }
         }
 
-        $this->assignView('title', $this->container->conf->get('general.title', 'Shaarli'));
-        $this->assignView('index_url', $indexUrl);
-        $this->assignView('page_url', $pageUrl);
-        $this->assignView('hide_timestamps', $this->container->conf->get('privacy.hide_timestamps', false));
-        $this->assignView('days', $dataPerDay);
+        $this->assignAllView([
+            'title' => $this->container->conf->get('general.title', 'Shaarli'),
+            'index_url' => $indexUrl,
+            'page_url' => $pageUrl,
+            'hide_timestamps' => $this->container->conf->get('privacy.hide_timestamps', false),
+            'days' => $dataPerDay,
+            'type' => $type,
+            'localizedType' => $this->translateType($type),
+        ]);
 
         $rssContent = $this->render(TemplatePage::DAILY_RSS);
 
@@ -189,4 +194,13 @@ class DailyController extends ShaarliVisitorController
 
         return $columns;
     }
+
+    protected function translateType($type): string
+    {
+        return [
+            t('day') => t('Daily'),
+            t('week') => t('Weekly'),
+            t('month') => t('Monthly'),
+        ][t($type)] ?? t('Daily');
+    }
 }
diff --git a/application/front/controller/visitor/ErrorController.php b/application/front/controller/visitor/ErrorController.php
index 10aa84c8..428e8254 100644
--- a/application/front/controller/visitor/ErrorController.php
+++ b/application/front/controller/visitor/ErrorController.php
@@ -26,12 +26,15 @@ class ErrorController extends ShaarliVisitorController
             $response = $response->withStatus($throwable->getCode());
         } else {
             // Internal error (any other Throwable)
-            if ($this->container->conf->get('dev.debug', false)) {
-                $this->assignView('message', $throwable->getMessage());
+            if ($this->container->conf->get('dev.debug', false) || $this->container->loginManager->isLoggedIn()) {
+                $this->assignView('message', t('Error: ') . $throwable->getMessage());
                 $this->assignView(
-                    'stacktrace',
-                    nl2br(get_class($throwable) .': '. PHP_EOL . $throwable->getTraceAsString())
+                    'text',
+                    '<a href="https://github.com/shaarli/Shaarli/issues/new">'
+                    . t('Please report it on Github.')
+                    . '</a>'
                 );
+                $this->assignView('stacktrace', exception2text($throwable));
             } else {
                 $this->assignView('message', t('An unexpected error occurred.'));
             }
@@ -39,7 +42,6 @@ class ErrorController extends ShaarliVisitorController
             $response = $response->withStatus(500);
         }
 
-
         return $response->write($this->render('error'));
     }
 }
diff --git a/application/front/controller/visitor/FeedController.php b/application/front/controller/visitor/FeedController.php
index 8d8b546a..edc7ef43 100644
--- a/application/front/controller/visitor/FeedController.php
+++ b/application/front/controller/visitor/FeedController.php
@@ -27,7 +27,7 @@ class FeedController extends ShaarliVisitorController
 
     protected function processRequest(string $feedType, Request $request, Response $response): Response
     {
-        $response = $response->withHeader('Content-Type', 'application/'. $feedType .'+xml; charset=utf-8');
+        $response = $response->withHeader('Content-Type', 'application/' . $feedType . '+xml; charset=utf-8');
 
         $pageUrl = page_url($this->container->environment);
         $cache = $this->container->pageCacheManager->getCachePage($pageUrl);
diff --git a/application/front/controller/visitor/InstallController.php b/application/front/controller/visitor/InstallController.php
index 7cb32777..418d4a49 100644
--- a/application/front/controller/visitor/InstallController.php
+++ b/application/front/controller/visitor/InstallController.php
@@ -4,10 +4,10 @@ declare(strict_types=1);
 
 namespace Shaarli\Front\Controller\Visitor;
 
-use Shaarli\ApplicationUtils;
 use Shaarli\Container\ShaarliContainer;
 use Shaarli\Front\Exception\AlreadyInstalledException;
 use Shaarli\Front\Exception\ResourcePermissionException;
+use Shaarli\Helper\ApplicationUtils;
 use Shaarli\Languages;
 use Shaarli\Security\SessionManager;
 use Slim\Http\Request;
@@ -39,7 +39,8 @@ class InstallController extends ShaarliVisitorController
         // Before installation, we'll make sure that permissions are set properly, and sessions are working.
         $this->checkPermissions();
 
-        if (static::SESSION_TEST_VALUE
+        if (
+            static::SESSION_TEST_VALUE
             !== $this->container->sessionManager->getSessionParameter(static::SESSION_TEST_KEY)
         ) {
             $this->container->sessionManager->setSessionParameter(static::SESSION_TEST_KEY, static::SESSION_TEST_VALUE);
@@ -53,6 +54,21 @@ class InstallController extends ShaarliVisitorController
         $this->assignView('cities', $cities);
         $this->assignView('languages', Languages::getAvailableLanguages());
 
+        $phpEol = new \DateTimeImmutable(ApplicationUtils::getPhpEol(PHP_VERSION));
+
+        $permissions = array_merge(
+            ApplicationUtils::checkResourcePermissions($this->container->conf),
+            ApplicationUtils::checkDatastoreMutex()
+        );
+
+        $this->assignView('php_version', PHP_VERSION);
+        $this->assignView('php_eol', format_date($phpEol, false));
+        $this->assignView('php_has_reached_eol', $phpEol < new \DateTimeImmutable());
+        $this->assignView('php_extensions', ApplicationUtils::getPhpExtensionsRequirement());
+        $this->assignView('permissions', $permissions);
+
+        $this->assignView('pagetitle', t('Install Shaarli'));
+
         return $response->write($this->render('install'));
     }
 
@@ -65,17 +81,18 @@ class InstallController extends ShaarliVisitorController
         // This part makes sure sessions works correctly.
         // (Because on some hosts, session.save_path may not be set correctly,
         // or we may not have write access to it.)
-        if (static::SESSION_TEST_VALUE
+        if (
+            static::SESSION_TEST_VALUE
             !== $this->container->sessionManager->getSessionParameter(static::SESSION_TEST_KEY)
         ) {
             // Step 2: Check if data in session is correct.
             $msg = t(
-                '<pre>Sessions do not seem to work correctly on your server.<br>'.
-                'Make sure the variable "session.save_path" is set correctly in your PHP config, '.
-                'and that you have write access to it.<br>'.
-                'It currently points to %s.<br>'.
-                'On some browsers, accessing your server via a hostname like \'localhost\' '.
-                'or any custom hostname without a dot causes cookie storage to fail. '.
+                '<pre>Sessions do not seem to work correctly on your server.<br>' .
+                'Make sure the variable "session.save_path" is set correctly in your PHP config, ' .
+                'and that you have write access to it.<br>' .
+                'It currently points to %s.<br>' .
+                'On some browsers, accessing your server via a hostname like \'localhost\' ' .
+                'or any custom hostname without a dot causes cookie storage to fail. ' .
                 'We recommend accessing your server via it\'s IP address or Fully Qualified Domain Name.<br>'
             );
             $msg = sprintf($msg, $this->container->sessionManager->getSavePath());
@@ -94,7 +111,8 @@ class InstallController extends ShaarliVisitorController
     public function save(Request $request, Response $response): Response
     {
         $timezone = 'UTC';
-        if (!empty($request->getParam('continent'))
+        if (
+            !empty($request->getParam('continent'))
             && !empty($request->getParam('city'))
             && isTimeZoneValid($request->getParam('continent'), $request->getParam('city'))
         ) {
@@ -104,7 +122,7 @@ class InstallController extends ShaarliVisitorController
 
         $login = $request->getParam('setlogin');
         $this->container->conf->set('credentials.login', $login);
-        $salt = sha1(uniqid('', true) .'_'. mt_rand());
+        $salt = sha1(uniqid('', true) . '_' . mt_rand());
         $this->container->conf->set('credentials.salt', $salt);
         $this->container->conf->set('credentials.hash', sha1($request->getParam('setpassword') . $login . $salt));
 
@@ -113,7 +131,7 @@ class InstallController extends ShaarliVisitorController
         } else {
             $this->container->conf->set(
                 'general.title',
-                'Shared bookmarks on '.escape(index_url($this->container->environment))
+                'Shared bookmarks on ' . escape(index_url($this->container->environment))
             );
         }
 
@@ -150,7 +168,7 @@ class InstallController extends ShaarliVisitorController
     protected function checkPermissions(): bool
     {
         // Ensure Shaarli has proper access to its resources
-        $errors = ApplicationUtils::checkResourcePermissions($this->container->conf);
+        $errors = ApplicationUtils::checkResourcePermissions($this->container->conf, true);
         if (empty($errors)) {
             return true;
         }
diff --git a/application/front/controller/visitor/LoginController.php b/application/front/controller/visitor/LoginController.php
index 121ba40b..4b881535 100644
--- a/application/front/controller/visitor/LoginController.php
+++ b/application/front/controller/visitor/LoginController.php
@@ -43,7 +43,7 @@ class LoginController extends ShaarliVisitorController
         $this
             ->assignView('returnurl', escape($returnUrl))
             ->assignView('remember_user_default', $this->container->conf->get('privacy.remember_user_default', true))
-            ->assignView('pagetitle', t('Login') .' - '. $this->container->conf->get('general.title', 'Shaarli'))
+            ->assignView('pagetitle', t('Login') . ' - ' . $this->container->conf->get('general.title', 'Shaarli'))
         ;
 
         return $response->write($this->render(TemplatePage::LOGIN));
@@ -64,8 +64,8 @@ class LoginController extends ShaarliVisitorController
             return $this->redirect($response, '/');
         }
 
-        if (!$this->container->loginManager->checkCredentials(
-                $this->container->environment['REMOTE_ADDR'],
+        if (
+            !$this->container->loginManager->checkCredentials(
                 client_ip_id($this->container->environment),
                 $request->getParam('login'),
                 $request->getParam('password')
@@ -102,7 +102,8 @@ class LoginController extends ShaarliVisitorController
      */
     protected function checkLoginState(): bool
     {
-        if ($this->container->loginManager->isLoggedIn()
+        if (
+            $this->container->loginManager->isLoggedIn()
             || $this->container->conf->get('security.open_shaarli', false)
         ) {
             throw new CantLoginException();
diff --git a/application/front/controller/visitor/PictureWallController.php b/application/front/controller/visitor/PictureWallController.php
index 3c57f8dd..23553ee6 100644
--- a/application/front/controller/visitor/PictureWallController.php
+++ b/application/front/controller/visitor/PictureWallController.php
@@ -26,7 +26,7 @@ class PictureWallController extends ShaarliVisitorController
 
         $this->assignView(
             'pagetitle',
-            t('Picture wall') .' - '. $this->container->conf->get('general.title', 'Shaarli')
+            t('Picture wall') . ' - ' . $this->container->conf->get('general.title', 'Shaarli')
         );
 
         // Optionally filter the results:
diff --git a/application/front/controller/visitor/ShaarliVisitorController.php b/application/front/controller/visitor/ShaarliVisitorController.php
index 54f9fe03..ae946c59 100644
--- a/application/front/controller/visitor/ShaarliVisitorController.php
+++ b/application/front/controller/visitor/ShaarliVisitorController.php
@@ -144,7 +144,8 @@ abstract class ShaarliVisitorController
         if (null !== $referer) {
             $currentUrl = parse_url($referer);
             // If the referer is not related to Shaarli instance, redirect to default
-            if (isset($currentUrl['host'])
+            if (
+                isset($currentUrl['host'])
                 && strpos(index_url($this->container->environment), $currentUrl['host']) === false
             ) {
                 return $response->withRedirect($defaultPath);
@@ -173,7 +174,7 @@ abstract class ShaarliVisitorController
             }
         }
 
-        $queryString = count($params) > 0 ? '?'. http_build_query($params) : '';
+        $queryString = count($params) > 0 ? '?' . http_build_query($params) : '';
         $anchor = $anchor ? '#' . $anchor : '';
 
         return $response->withRedirect($path . $queryString . $anchor);
diff --git a/application/front/controller/visitor/TagCloudController.php b/application/front/controller/visitor/TagCloudController.php
index 76ed7690..46d62779 100644
--- a/application/front/controller/visitor/TagCloudController.php
+++ b/application/front/controller/visitor/TagCloudController.php
@@ -47,13 +47,14 @@ class TagCloudController extends ShaarliVisitorController
      */
     protected function processRequest(string $type, Request $request, Response $response): Response
     {
+        $tagsSeparator = $this->container->conf->get('general.tags_separator', ' ');
         if ($this->container->loginManager->isLoggedIn() === true) {
             $visibility = $this->container->sessionManager->getSessionParameter('visibility');
         }
 
         $sort = $request->getQueryParam('sort');
         $searchTags = $request->getQueryParam('searchtags');
-        $filteringTags = $searchTags !== null ? explode(' ', $searchTags) : [];
+        $filteringTags = $searchTags !== null ? explode($tagsSeparator, $searchTags) : [];
 
         $tags = $this->container->bookmarkService->bookmarksCountPerTag($filteringTags, $visibility ?? null);
 
@@ -71,8 +72,9 @@ class TagCloudController extends ShaarliVisitorController
             $tagsUrl[escape($tag)] = urlencode((string) $tag);
         }
 
-        $searchTags = implode(' ', escape($filteringTags));
-        $searchTagsUrl = urlencode(implode(' ', $filteringTags));
+        $searchTags = tags_array2str($filteringTags, $tagsSeparator);
+        $searchTags = !empty($searchTags) ? trim($searchTags, $tagsSeparator) . $tagsSeparator : '';
+        $searchTagsUrl = urlencode($searchTags);
         $data = [
             'search_tags' => escape($searchTags),
             'search_tags_url' => $searchTagsUrl,
@@ -82,10 +84,10 @@ class TagCloudController extends ShaarliVisitorController
         $this->executePageHooks('render_tag' . $type, $data, 'tag.' . $type);
         $this->assignAllView($data);
 
-        $searchTags = !empty($searchTags) ? $searchTags .' - ' : '';
+        $searchTags = !empty($searchTags) ? trim(str_replace($tagsSeparator, ' ', $searchTags)) . ' - ' : '';
         $this->assignView(
             'pagetitle',
-            $searchTags . t('Tag '. $type) .' - '. $this->container->conf->get('general.title', 'Shaarli')
+            $searchTags . t('Tag ' . $type) . ' - ' . $this->container->conf->get('general.title', 'Shaarli')
         );
 
         return $response->write($this->render('tag.' . $type));
diff --git a/application/front/controller/visitor/TagController.php b/application/front/controller/visitor/TagController.php
index de4e7ea2..3aa58542 100644
--- a/application/front/controller/visitor/TagController.php
+++ b/application/front/controller/visitor/TagController.php
@@ -27,7 +27,7 @@ class TagController extends ShaarliVisitorController
         // In case browser does not send HTTP_REFERER, we search a single tag
         if (null === $referer) {
             if (null !== $newTag) {
-                return $this->redirect($response, '/?searchtags='. urlencode($newTag));
+                return $this->redirect($response, '/?searchtags=' . urlencode($newTag));
             }
 
             return $this->redirect($response, '/');
@@ -37,7 +37,7 @@ class TagController extends ShaarliVisitorController
         parse_str($currentUrl['query'] ?? '', $params);
 
         if (null === $newTag) {
-            return $response->withRedirect(($currentUrl['path'] ?? './') .'?'. http_build_query($params));
+            return $response->withRedirect(($currentUrl['path'] ?? './') . '?' . http_build_query($params));
         }
 
         // Prevent redirection loop
@@ -45,9 +45,10 @@ class TagController extends ShaarliVisitorController
             unset($params['addtag']);
         }
 
+        $tagsSeparator = $this->container->conf->get('general.tags_separator', ' ');
         // Check if this tag is already in the search query and ignore it if it is.
         // Each tag is always separated by a space
-        $currentTags = isset($params['searchtags']) ? explode(' ', $params['searchtags']) : [];
+        $currentTags = tags_str2array($params['searchtags'] ?? '', $tagsSeparator);
 
         $addtag = true;
         foreach ($currentTags as $value) {
@@ -62,12 +63,12 @@ class TagController extends ShaarliVisitorController
             $currentTags[] = trim($newTag);
         }
 
-        $params['searchtags'] = trim(implode(' ', $currentTags));
+        $params['searchtags'] = tags_array2str($currentTags, $tagsSeparator);
 
         // We also remove page (keeping the same page has no sense, since the results are different)
         unset($params['page']);
 
-        return $response->withRedirect(($currentUrl['path'] ?? './') .'?'. http_build_query($params));
+        return $response->withRedirect(($currentUrl['path'] ?? './') . '?' . http_build_query($params));
     }
 
     /**
@@ -89,7 +90,7 @@ class TagController extends ShaarliVisitorController
         parse_str($currentUrl['query'] ?? '', $params);
 
         if (null === $tagToRemove) {
-            return $response->withRedirect(($currentUrl['path'] ?? './') .'?'. http_build_query($params));
+            return $response->withRedirect(($currentUrl['path'] ?? './') . '?' . http_build_query($params));
         }
 
         // Prevent redirection loop
@@ -98,10 +99,11 @@ class TagController extends ShaarliVisitorController
         }
 
         if (isset($params['searchtags'])) {
-            $tags = explode(' ', $params['searchtags']);
+            $tagsSeparator = $this->container->conf->get('general.tags_separator', ' ');
+            $tags = tags_str2array($params['searchtags'] ?? '', $tagsSeparator);
             // Remove value from array $tags.
             $tags = array_diff($tags, [$tagToRemove]);
-            $params['searchtags'] = implode(' ', $tags);
+            $params['searchtags'] = tags_array2str($tags, $tagsSeparator);
 
             if (empty($params['searchtags'])) {
                 unset($params['searchtags']);