issue #1615 include favorite status in image list API calls

include/functions_url.inc.php

@@ -880,4 +880,28 @@ function url_is_remote($url)
   return false;
 }
 
+/**
+ * List favorite image_ids of the current user.
+ * @since 13
+ */
+function get_user_favorites()
+{
+  global $user;
+
+  if (is_a_guest())
+  {
+    return array();
+  }
+
+  $query = '
+SELECT
+    image_id,
+    1 as fake_value
+  FROM '.FAVORITES_TABLE.'
+  WHERE user_id = '.$user['id'].'
+';
+
+  return query2array($query, 'image_id', 'fake_value');
+}
+
 ?>

include/ws_functions/pwg.categories.php

@@ -77,6 +77,7 @@ SELECT id, name, permalink, image_order
       $order_by = $cats[ $params['cat_id'][0] ]['image_order'];
     }
     $order_by = empty($order_by) ? $conf['order_by'] : 'ORDER BY '.$order_by;
+    $favorite_ids = get_user_favorites();
 
     $query = '
 SELECT SQL_CALC_FOUND_ROWS i.*, GROUP_CONCAT(category_id) AS cat_ids
@@ -93,6 +94,7 @@ SELECT SQL_CALC_FOUND_ROWS i.*, GROUP_CONCAT(category_id) AS cat_ids
     while ($row = pwg_db_fetch_assoc($result))
     {
       $image = array();
+      $image['is_favorite'] = isset($favorite_ids[ $row['id'] ]);
       foreach (array('id', 'width', 'height', 'hit') as $k)
       {
         if (isset($row[$k]))

include/ws_functions/pwg.images.php

@@ -646,10 +646,12 @@ SELECT *
 ;';
     $result = pwg_query($query);
     $image_ids = array_flip($image_ids);
+    $favorite_ids = get_user_favorites();
 
     while ($row = pwg_db_fetch_assoc($result))
     {
       $image = array();
+      $image['is_favorite'] = isset($favorite_ids[ $row['id'] ]);
       foreach (array('id', 'width', 'height', 'hit') as $k)
       {
         if (isset($row[$k]))

include/ws_functions/pwg.tags.php

@@ -134,6 +134,7 @@ SELECT image_id, GROUP_CONCAT(tag_id) AS tag_ids
   if (!empty($image_ids))
   {
     $rank_of = array_flip($image_ids);
+    $favorite_ids = get_user_favorites();
 
     $query = '
 SELECT *
@@ -146,6 +147,7 @@ SELECT *
     {
       $image = array();
       $image['rank'] = $rank_of[ $row['id'] ];
+      $image['is_favorite'] = isset($favorite_ids[ $row['id'] ]);
 
       foreach (array('id', 'width', 'height', 'hit') as $k)
       {