issue #1827 new check on filesystem compared to what is listed in the database

While not fixing issue #1827 it helps users to detect if they have been
affected by the problem.

admin.php

@@ -29,6 +29,31 @@ check_status(ACCESS_ADMINISTRATOR);
 check_input_parameter('page', $_GET, false, '/^[a-zA-Z\d_-]+$/');
 check_input_parameter('section', $_GET, false, '/^[a-z]+[a-z_\/-]*(\.php)?$/i');
 
+// +-----------------------------------------------------------------------+
+// | Filesystem checks                                                     |
+// +-----------------------------------------------------------------------+
+
+if ($conf['fs_quick_check_period'] > 0)
+{
+  $perform_fsqc = false;
+  if (isset($conf['fs_quick_check_last_check']))
+  {
+    if (strtotime($conf['fs_quick_check_last_check']) < strtotime($conf['fs_quick_check_period'].' seconds ago'))
+    {
+      $perform_fsqc = true;
+    }
+  }
+  else
+  {
+    $perform_fsqc = true;
+  }
+
+  if ($perform_fsqc)
+  {
+    fs_quick_check();
+  }
+}
+
 // +-----------------------------------------------------------------------+
 // | Direct actions                                                        |
 // +-----------------------------------------------------------------------+

admin/include/functions.php

@@ -3458,6 +3458,79 @@ function get_cache_size_derivatives($path)
   return $msizes;
 }
 
+/**
+ * Displays a header warning if we find missing photos on a random sample.
+ *
+ * @since 13.4.0
+ */
+function fs_quick_check()
+{
+  global $page, $conf;
+
+  if ($conf['fs_quick_check_period'] == 0)
+  {
+    return;
+  }
+
+  if (isset($page[__FUNCTION__.'_already_called']))
+  {
+    return;
+  }
+
+  $page[__FUNCTION__.'_already_called'] = true;
+  conf_update_param('fs_quick_check_last_check', date('c'));
+
+  $query = '
+SELECT
+    id
+  FROM '.IMAGES_TABLE.'
+  WHERE date_available < \'2022-12-08 00:00:00\'
+    AND path LIKE \'./upload/%\'
+  LIMIT 5000
+;';
+  $issue1827_ids = query2array($query, null, 'id');
+  shuffle($issue1827_ids);
+  $issue1827_ids = array_slice($issue1827_ids, 0, 50);
+
+  $query = '
+SELECT
+    id
+  FROM '.IMAGES_TABLE.'
+  LIMIT 5000
+;';
+  $random_image_ids = query2array($query, null, 'id');
+  shuffle($random_image_ids);
+  $random_image_ids = array_slice($random_image_ids, 0, 50);
+
+  $fs_quick_check_ids = array_unique(array_merge($issue1827_ids, $random_image_ids));
+
+  $query = '
+SELECT
+    id,
+    path
+  FROM '.IMAGES_TABLE.'
+  WHERE id IN ('.implode(',', $fs_quick_check_ids).')
+;';
+  $fsqc_paths = query2array($query, 'id', 'path');
+
+  foreach ($fsqc_paths as $id => $path)
+  {
+    if (!file_exists($path))
+    {
+      global $template;
+
+      $template->assign(
+        'header_msgs',
+        array(
+          l10n('Some photos are missing from your file system. Details provided by plugin Check Uploads'),
+        )
+      );
+
+      return;
+    }
+  }
+}
+
 /**
  * Return news from piwigo.org.
  *

admin/include/updates.class.php

@@ -552,6 +552,7 @@ class updates
               // changes. Anyway, a compiled template purge will be performed
               // by upgrade.php
               $template->delete_compiled_templates();
+              conf_delete_param('fs_quick_check_last_check');
 
               $page['infos'][] = l10n('Update Complete');
               $page['infos'][] = $upgrade_to;

admin/intro.php

@@ -73,6 +73,8 @@ if ($nb_orphans > 0)
   $page['warnings'][] = $message;
 }
 
+fs_quick_check();
+
 // +-----------------------------------------------------------------------+
 // |                             template init                             |
 // +-----------------------------------------------------------------------+

admin/maintenance_actions.php

@@ -6,6 +6,8 @@
 // | file that was distributed with this source code.                      |
 // +-----------------------------------------------------------------------+
 
+fs_quick_check();
+
 // +-----------------------------------------------------------------------+
 // |                                actions                                |
 // +-----------------------------------------------------------------------+

include/config_default.inc.php

@@ -280,6 +280,13 @@ $conf['stat_compare_year_displayed'] = 5;
 // Limit for linked albums search
 $conf['linked_album_search_limit'] = 100;
 
+// how often should we check for missing photos in the filesystem. Only in the
+// administration. Consider the fs_quick_check is always performed on
+// dashboard and maintenance pages. This setting is only for any other
+// administration page.
+// 0 to disable.
+$conf['fs_quick_check_period'] = 24*60*60;
+
 // +-----------------------------------------------------------------------+
 // |                                 email                                 |
 // +-----------------------------------------------------------------------+

language/en_UK/admin.lang.php

@@ -1325,4 +1325,5 @@ $lang['If anything bad happens during the update, you would be able to restore a
 $lang['Apply to root albums'] = 'Apply to root albums';
 $lang['Album name must not be empty'] = 'Album name must not be empty';
 $lang['Visit history'] = 'Visit history';
+$lang['Some photos are missing from your file system. Details provided by plugin Check Uploads'] = 'Some photos are missing from your file system. Details provided by plugin Check Uploads';
 // Leave this line empty

language/fr_FR/admin.lang.php

@@ -1325,4 +1325,5 @@ $lang['If anything bad happens during the update, you would be able to restore a
 $lang['Apply to root albums'] = 'Appliquer aux albums racine';
 $lang['Album name must not be empty'] = 'Le nom de l\'album ne doit pas être vide';
 $lang['Visit history'] = 'Historique des visites';
+$lang['Some photos are missing from your file system. Details provided by plugin Check Uploads'] = 'Des photos sont absentes de votre système de fichier. À contrôler avec le plugin Check Uploads.';
 // Leave this line empty