issue #1941 search, implement filter by file type

include/functions_search.inc.php

@@ -195,6 +195,16 @@ SELECT
     }
   }
 
+  if (!empty($search['fields']['filetypes']))
+  {
+    $filetypes_clauses = array();
+    foreach ($search['fields']['filetypes'] as $ext)
+    {
+      $filetypes_clauses[] = 'path LIKE \'%.'.$ext.'\'';
+    }
+    $clauses[] = implode(' OR ', $filetypes_clauses);
+  }
+
   if (!empty($search['fields']['added_by']))
   {
     $clauses[] = 'added_by IN ('.implode(',', $search['fields']['added_by']).')';

include/ws_functions/pwg.images.php

@@ -806,6 +806,19 @@ SELECT id
     );
   }
 
+  if (isset($params['filetypes']))
+  {
+    foreach ($params['filetypes'] as $ext)
+    {
+      if (!preg_match('/^[a-z0-9]+$/i', $ext))
+      {
+        return new PwgError(WS_ERR_INVALID_PARAM, 'Invalid parameter filetypes');
+      }
+    }
+
+    $search['fields']['filetypes'] = $params['filetypes'];
+  }
+
   if (isset($params['added_by']))
   {
     foreach ($params['added_by'] as $user_id)

ws.php

@@ -1410,6 +1410,9 @@ enabled_high, registration_date, registration_date_string, registration_date_sin
           'flags' => WS_PARAM_OPTIONAL|WS_PARAM_FORCE_ARRAY,
           'type' => WS_TYPE_ID,
         ),
+        'filetypes' => array(
+          'flags' => WS_PARAM_OPTIONAL|WS_PARAM_FORCE_ARRAY,
+        ),
       ),
       '',
       $ws_functions_root . 'pwg.images.php'