From 9f8d9443c961436b6e7ca908d97b9db1d07bb226 Mon Sep 17 00:00:00 2001
From: rvelices <rv-github@modusoptimus.com>
Date: Sat, 17 May 2014 06:09:33 +0000
Subject: use persistent cache for calendar list in root flat mode (same perf
 improvement as category flat view)

git-svn-id: http://piwigo.org/svn/trunk@28491 68402e56-0260-453c-a942-63ccdbb3a9ee
---
 include/functions_calendar.inc.php | 30 +++++++++++++++++++++---------
 1 file changed, 21 insertions(+), 9 deletions(-)

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

diff --git a/include/functions_calendar.inc.php b/include/functions_calendar.inc.php
index 2f71e5d94..30cdb0db0 100644
--- a/include/functions_calendar.inc.php
+++ b/include/functions_calendar.inc.php
@@ -36,7 +36,7 @@ define('CAL_VIEW_CALENDAR', 'calendar');
  */
 function initialize_calendar()
 {
-  global $page, $conf, $user, $template, $filter;
+  global $page, $conf, $user, $template, $persistent_cache, $filter;
 
 //------------------ initialize the condition on items to take into account ---
   $inner_sql = ' FROM ' . IMAGES_TABLE;
@@ -269,14 +269,9 @@ WHERE id IN (' . implode(',',$page['items']) .')';
 
   if ($must_show_list)
   {
-    $query = 'SELECT DISTINCT id ';
-    $query .= ','.$calendar->date_field;
-    $query .= $calendar->inner_sql.'
-  '.$calendar->get_date_where();
     if ( isset($page['super_order_by']) )
     {
-      $query .= '
-  '.$conf['order_by'];
+      $order_by = $conf['order_by'];
     }
     else
     {
@@ -293,10 +288,27 @@ WHERE id IN (' . implode(',',$page['items']) .')';
         'ORDER BY ',
         'ORDER BY '.$calendar->date_field.$order, $conf['order_by']
         );
-      $query .= '
+    }
+    
+    if ('categories'==$page['section'] && !isset($page['category'])
+      && ( count($page['chronology_date'])==0
+            OR ($page['chronology_date'][0]=='any' && count($page['chronology_date'])==1) )
+      )
+    {
+      $cache_key = $persistent_cache->make_key($user['id'].$user['cache_update_time']
+        .$calendar->date_field.$order_by);
+    }
+
+    if ( !isset($cache_key) || !$persistent_cache->get($cache_key, $page['items']))
+    {
+      $query = 'SELECT DISTINCT id '
+        .$calendar->inner_sql.'
+  '.$calendar->get_date_where().'
   '.$order_by;
+      $page['items'] = array_from_query($query, 'id');
+      if ( isset($cache_key) )
+        $persistent_cache->set($cache_key, $page['items']);
     }
-    $page['items'] = array_from_query($query, 'id');
   }
   pwg_debug('end initialize_calendar');
 }
-- 
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