From d39db9aaaf43eaedd634a7a5b7d06bcb69d41152 Mon Sep 17 00:00:00 2001
From: plegall <plg@piwigo.org>
Date: Thu, 11 Sep 2008 21:40:00 +0000
Subject: feature 169 added: ability to manually sort images inside a category.
 A dedicated screen let the administrator sort the images (pur HTML, no
 JavaScript yet). The "rank" sort order is available only for a category
 without flat mode. New database column image_category.rank.

git-svn-id: http://piwigo.org/svn/trunk@2517 68402e56-0260-453c-a942-63ccdbb3a9ee
---
 include/section_init.inc.php | 34 +++++++++++++++++++++++++++++-----
 1 file changed, 29 insertions(+), 5 deletions(-)

(limited to 'include/section_init.inc.php')

diff --git a/include/section_init.inc.php b/include/section_init.inc.php
index 053607dfd..97f2f0a42 100644
--- a/include/section_init.inc.php
+++ b/include/section_init.inc.php
@@ -172,16 +172,40 @@ if ( script_basename()=='picture' and 'categories'==$page['section'] and
 // By default, it is the same as the $user['nb_image_page']
 $page['nb_image_page'] = $user['nb_image_page'];
 
+// if flat mode is active, we must consider the image set as a standard set
+// and not as a category set because we can't use the #image_category.rank :
+// displayed images are not directly linked to the displayed category
+if ('categories' == $page['section'] and !isset($page['flat']))
+{
+  $conf['order_by'] = $conf['order_by_inside_category'];
+}
+
 if (pwg_get_session_var('image_order',0) > 0)
 {
+  $image_order_id = pwg_get_session_var('image_order');
+  
   $orders = get_category_preferred_image_orders();
 
-  $conf['order_by'] = str_replace(
-    'ORDER BY ',
-    'ORDER BY '.$orders[ pwg_get_session_var('image_order',0) ][1].',',
-    $conf['order_by']
+  // the current session stored image_order might be not compatible with
+  // current image set, for example if the current image_order is the rank
+  // and that we are displaying images related to a tag.
+  //
+  // In case of incompatibility, the session stored image_order is removed.
+  if ($orders[$image_order_id][2])
+  {
+    $conf['order_by'] = str_replace(
+      'ORDER BY ',
+      'ORDER BY '.$orders[$image_order_id][1].',',
+      $conf['order_by']
     );
-  $page['super_order_by'] = true;
+    $page['super_order_by'] = true;
+
+  }
+  else
+  {
+    pwg_unset_session_var('image_order');
+    $page['super_order_by'] = false;
+  }
 }
 
 $forbidden = get_sql_condition_FandF(
-- 
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