Merge pull request #1698 from ArthurHoaro/feature/plugins-search-filter

[github/shaarli/Shaarli.git] / application / Thumbnailer.php

diff --git a/application/Thumbnailer.php b/application/Thumbnailer.php
index b669adaedef74afcbca8d80219901b91f8a12b7c..c4ff8d7abac86a87983cd9b58b9a980fae832540 100644 (file)
--- a/application/Thumbnailer.php
+++ b/application/Thumbnailer.php
@@ -1,5 +1,9 @@
 <?php
 
+namespace Shaarli;
+
+use Shaarli\Config\ConfigManager;
+use WebThumbnailer\Application\ConfigManager as WTConfigManager;
 use WebThumbnailer\WebThumbnailer;
 
 /**
@@ -9,6 +13,28 @@ use WebThumbnailer\WebThumbnailer;
  */
 class Thumbnailer
 {
+    protected const COMMON_MEDIA_DOMAINS = [
+        'imgur.com',
+        'flickr.com',
+        'youtube.com',
+        'wikimedia.org',
+        'redd.it',
+        'gfycat.com',
+        'media.giphy.com',
+        'twitter.com',
+        'twimg.com',
+        'instagram.com',
+        'pinterest.com',
+        'pinterest.fr',
+        'soundcloud.com',
+        'tumblr.com',
+        'deviantart.com',
+    ];
+
+    public const MODE_ALL = 'all';
+    public const MODE_COMMON = 'common';
+    public const MODE_NONE = 'none';
+
     /**
      * @var WebThumbnailer instance.
      */
@@ -27,8 +53,19 @@ class Thumbnailer
     public function __construct($conf)
     {
         $this->conf = $conf;
+
+        if (! $this->checkRequirements()) {
+            $this->conf->set('thumbnails.mode', Thumbnailer::MODE_NONE);
+            $this->conf->write(true);
+            // TODO: create a proper error handling system able to catch exceptions...
+            die(t(
+                'php-gd extension must be loaded to use thumbnails. '
+                . 'Thumbnails are now disabled. Please reload the page.'
+            ));
+        }
+
         $this->wt = new WebThumbnailer();
-        \WebThumbnailer\Application\ConfigManager::addFile('inc/web-thumbnailer.json');
+        WTConfigManager::addFile('inc/web-thumbnailer.json');
         $this->wt->maxWidth($this->conf->get('thumbnails.width'))
                  ->maxHeight($this->conf->get('thumbnails.height'))
                  ->crop(true)
@@ -44,6 +81,51 @@ class Thumbnailer
      */
     public function get($url)
     {
-        return $this->wt->thumbnail($url);
+        if (
+            $this->conf->get('thumbnails.mode') === self::MODE_COMMON
+            && ! $this->isCommonMediaOrImage($url)
+        ) {
+            return false;
+        }
+
+        try {
+            return $this->wt->thumbnail($url);
+        } catch (\Throwable $e) {
+            // Exceptions are only thrown in debug mode.
+            error_log(get_class($e) . ': ' . $e->getMessage());
+        }
+        return false;
+    }
+
+    /**
+     * We check weather the given URL is from a common media domain,
+     * or if the file extension is an image.
+     *
+     * @param string $url to check
+     *
+     * @return bool true if it's an image or from a common media domain, false otherwise.
+     */
+    public function isCommonMediaOrImage($url)
+    {
+        foreach (self::COMMON_MEDIA_DOMAINS as $domain) {
+            if (strpos($url, $domain) !== false) {
+                return true;
+            }
+        }
+
+        if (endsWith($url, '.jpg') || endsWith($url, '.png') || endsWith($url, '.jpeg')) {
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * Make sure that requirements are match to use thumbnails:
+     *   - php-gd is loaded
+     */
+    protected function checkRequirements()
+    {
+        return extension_loaded('gd');
     }
 }