API call to add/remove favorites (#810)

add API methods pwg.users.addFavorite and pwg.users.removeFavorite

include/ws_functions/pwg.users.php

@@ -632,6 +632,55 @@ SELECT
     ));
 }
 
+/**
+ * API method
+ * Adds a favorite image for the current user
+ * @param mixed[] $params
+ */
+function ws_addFavorite($params, &$service)
+{
+  global $user;
+  if (is_a_guest())
+  {
+    return new PwgError(403, 'User must be logged in.');
+  }
+
+  $query = '
+INSERT IGNORE INTO '.FAVORITES_TABLE.'
+  (image_id,user_id)
+  VALUES
+  ('.$params['image_id'].','.$user['id'].')
+;';
+
+  pwg_query($query);
+
+  return true;
+}
+
+/**
+ * API method
+ * Removes a favorite image for the current user
+ * @param mixed[] $params
+ */
+function ws_removeFavorite($params, &$service)
+{
+  global $user;
+  if (is_a_guest())
+  {
+    return new PwgError(403, 'User must be logged in.');
+  }
+
+  $query = '
+DELETE FROM '.FAVORITES_TABLE.'
+  WHERE user_id = '.$user['id'].'
+    AND image_id = '.$params['image_id'].'
+;';
+
+  pwg_query($query);
+
+  return true;
+}
+
 /**
  * API method
  * Returns the favorite images of the current user

ws.php

@@ -1077,6 +1077,26 @@ enabled_high, registration_date, registration_date_string, registration_date_sin
       array('admin_only'=>true, 'post_only'=>true)
     );
 
+  $service->addMethod(
+      'pwg.users.addFavorite',
+      'ws_addFavorite',
+      array(
+        'image_id' =>  array('type'=>WS_TYPE_ID)
+       ),
+      'Adds the indicated image to the current user\'s favorite images.',
+      $ws_functions_root . 'pwg.users.php'
+    );
+
+  $service->addMethod(
+      'pwg.users.removeFavorite',
+      'ws_removeFavorite',
+      array(
+        'image_id' =>  array('type'=>WS_TYPE_ID)
+       ),
+      'Removes the indicated image from the current user\'s favorite images.',
+      $ws_functions_root . 'pwg.users.php'
+    );
+
   $service->addMethod(
       'pwg.users.getFavorites',
       'ws_getFavorites',