6 files changed, 112 insertions, 2 deletions

diff --git a/application/bookmark/Bookmark.php b/application/bookmark/Bookmark.php
index f9b21d3d..83ddab82 100644
--- a/application/bookmark/Bookmark.php
+++ b/application/bookmark/Bookmark.php
@@ -346,7 +346,7 @@ class Bookmark
     /**
      * Get the Thumbnail.
      *
-     * @return string|bool
+     * @return string|bool|null
      */
     public function getThumbnail()
     {
diff --git a/application/container/ContainerBuilder.php b/application/container/ContainerBuilder.php
index e2c78ccc..99c12334 100644
--- a/application/container/ContainerBuilder.php
+++ b/application/container/ContainerBuilder.php
@@ -7,6 +7,7 @@ namespace Shaarli\Container;
 use Shaarli\Bookmark\BookmarkFileService;
 use Shaarli\Bookmark\BookmarkServiceInterface;
 use Shaarli\Config\ConfigManager;
+use Shaarli\Formatter\FormatterFactory;
 use Shaarli\History;
 use Shaarli\Plugin\PluginManager;
 use Shaarli\Render\PageBuilder;
@@ -76,6 +77,10 @@ class ContainerBuilder
             return new PluginManager($container->conf);
         };
 
+        $container['formatterFactory'] = function (ShaarliContainer $container): FormatterFactory {
+            return new FormatterFactory($container->conf, $container->loginManager->isLoggedIn());
+        };
+
         return $container;
     }
 }
diff --git a/application/container/ShaarliContainer.php b/application/container/ShaarliContainer.php
index 3fa9116e..fdf2f77f 100644
--- a/application/container/ShaarliContainer.php
+++ b/application/container/ShaarliContainer.php
@@ -6,6 +6,7 @@ namespace Shaarli\Container;
 
 use Shaarli\Bookmark\BookmarkServiceInterface;
 use Shaarli\Config\ConfigManager;
+use Shaarli\Formatter\FormatterFactory;
 use Shaarli\History;
 use Shaarli\Plugin\PluginManager;
 use Shaarli\Render\PageBuilder;
@@ -23,6 +24,7 @@ use Slim\Container;
  * @property BookmarkServiceInterface $bookmarkService
  * @property PageBuilder              $pageBuilder
  * @property PluginManager            $pluginManager
+ * @property FormatterFactory         $formatterFactory
  */
 class ShaarliContainer extends Container
 {
diff --git a/application/front/controllers/PictureWallController.php b/application/front/controllers/PictureWallController.php
new file mode 100644
index 00000000..08d31b29
--- /dev/null
+++ b/application/front/controllers/PictureWallController.php
@@ -0,0 +1,72 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shaarli\Front\Controller;
+
+use Shaarli\Front\Exception\ThumbnailsDisabledException;
+use Shaarli\Thumbnailer;
+use Slim\Http\Request;
+use Slim\Http\Response;
+
+/**
+ * Class PicturesWallController
+ *
+ * Slim controller used to render the pictures wall page.
+ * If thumbnails mode is set to NONE, we just render the template without any image.
+ *
+ * @package Front\Controller
+ */
+class PictureWallController extends ShaarliController
+{
+    public function index(Request $request, Response $response): Response
+    {
+        if ($this->container->conf->get('thumbnails.mode', Thumbnailer::MODE_NONE) === Thumbnailer::MODE_NONE) {
+            throw new ThumbnailsDisabledException();
+        }
+
+        $this->assignView(
+            'pagetitle',
+            t('Picture wall') .' - '. $this->container->conf->get('general.title', 'Shaarli')
+        );
+
+        // Optionally filter the results:
+        $links = $this->container->bookmarkService->search($request->getQueryParams());
+        $linksToDisplay = [];
+
+        // Get only bookmarks which have a thumbnail.
+        // Note: we do not retrieve thumbnails here, the request is too heavy.
+        $formatter = $this->container->formatterFactory->getFormatter('raw');
+        foreach ($links as $key => $link) {
+            if (!empty($link->getThumbnail())) {
+                $linksToDisplay[] = $formatter->format($link);
+            }
+        }
+
+        $data = $this->executeHooks($linksToDisplay);
+        foreach ($data as $key => $value) {
+            $this->assignView($key, $value);
+        }
+
+        return $response->write($this->render('picwall'));
+    }
+
+    /**
+     * @param mixed[] $linksToDisplay List of formatted bookmarks
+     *
+     * @return mixed[] Template data after active plugins render_picwall hook execution.
+     */
+    protected function executeHooks(array $linksToDisplay): array
+    {
+        $data = [
+            'linksToDisplay' => $linksToDisplay,
+        ];
+        $this->container->pluginManager->executeHooks(
+            'render_picwall',
+            $data,
+            ['loggedin' => $this->container->loginManager->isLoggedIn()]
+        );
+
+        return $data;
+    }
+}
diff --git a/application/front/exceptions/ThumbnailsDisabledException.php b/application/front/exceptions/ThumbnailsDisabledException.php
new file mode 100644
index 00000000..1b9cf5b7
--- /dev/null
+++ b/application/front/exceptions/ThumbnailsDisabledException.php
@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shaarli\Front\Exception;
+
+class ThumbnailsDisabledException extends ShaarliException
+{
+    public function __construct()
+    {
+        $message = t('Picture wall unavailable (thumbnails are disabled).');
+
+        parent::__construct($message, 400);
+    }
+}
diff --git a/application/updater/Updater.php b/application/updater/Updater.php
index 95654d81..4bbcb9f2 100644
--- a/application/updater/Updater.php
+++ b/application/updater/Updater.php
@@ -2,8 +2,8 @@
 
 namespace Shaarli\Updater;
 
-use Shaarli\Config\ConfigManager;
 use Shaarli\Bookmark\BookmarkServiceInterface;
+use Shaarli\Config\ConfigManager;
 use Shaarli\Updater\Exception\UpdaterException;
 
 /**
@@ -111,4 +111,20 @@ class Updater
     {
         return $this->doneUpdates;
     }
+
+    /**
+     * With the Slim routing system, default header link should be `./` instead of `?`.
+     * Otherwise you can not go back to the home page. Example: `/picture-wall` -> `/picture-wall?` instead of `/`.
+     */
+    public function updateMethodRelativeHomeLink(): bool
+    {
+        $link = trim($this->conf->get('general.header_link'));
+        if ($link[0] === '?') {
+            $link = './'. ltrim($link, '?');
+
+            $this->conf->set('general.header_link', $link, true, true);
+        }
+
+        return true;
+    }
 }