3 files changed, 50 insertions, 1 deletions
diff --git a/include/common.inc.php b/include/common.inc.php
index 38b0e7de0..a86bbc9ac 100644
--- a/include/common.inc.php
+++ b/include/common.inc.php
@@ -131,7 +131,47 @@ mysql_connect( $cfgHote, $cfgUser, $cfgPassword )
 or die ( "Could not connect to database server" );
 mysql_select_db( $cfgBase )
 or die ( "Could not connect to database" );
-	
+
+if ($conf['check_upgrade_feed'])
+{
+  define('PREFIX_TABLE', $prefixeTable);
+  define('UPGRADES_PATH', PHPWG_ROOT_PATH.'install/db');
+  
+  // retrieve already applied upgrades
+  $query = '
+SELECT id
+  FROM '.PREFIX_TABLE.'upgrade
+;';
+  $applied = array_from_query($query, 'id');
+
+  // retrieve existing upgrades
+  $existing = array();
+
+  if ($contents = opendir(UPGRADES_PATH))
+  {
+    while (($node = readdir($contents)) !== false)
+    {
+      if (is_file(UPGRADES_PATH.'/'.$node)
+          and preg_match('/^(.*?)-database\.php$/', $node, $match))
+      {
+        array_push($existing, $match[1]);
+      }
+    }
+  }
+  natcasesort($existing);
+
+  // which upgrades need to be applied?
+  if (count(array_diff($existing, $applied)) > 0)
+  {
+    echo
+      '<p>'
+      .'Some database upgrades are missing, '
+      .'<a href="'.PHPWG_ROOT_PATH.'upgrade_feed.php">upgrade now</a>'
+      .'</p>'
+      ;
+  }
+}
+
 //
 // Setup gallery wide options, if this fails then we output a CRITICAL_ERROR
 // since basic gallery information is not available
diff --git a/include/config_default.inc.php b/include/config_default.inc.php
index 3ad250a98..7c7ea9089 100644
--- a/include/config_default.inc.php
+++ b/include/config_default.inc.php
@@ -182,6 +182,14 @@ $conf['users_page'] = 20;
 // "options" parameter missing on mail() function execution.
 $conf['mail_options'] = false;
 
+// check_upgrade_feed: check if there are database upgrade required. Set to
+// true, a message will strongly encourage you to upgrade your database if
+// needed.
+//
+// This configuration parameter is set to true in BSF branch and to false
+// elsewhere.
+$conf['check_upgrade_feed'] = true;
+
 // +-----------------------------------------------------------------------+
 // |                               metadata                                |
 // +-----------------------------------------------------------------------+
diff --git a/include/constants.php b/include/constants.php
index a7823b230..bb5a1d926 100644
--- a/include/constants.php
+++ b/include/constants.php
@@ -59,4 +59,5 @@ define('IMAGE_METADATA_TABLE', $prefixeTable.'image_metadata');
 define('RATE_TABLE', $prefixeTable.'rate');
 define('USER_CACHE_TABLE', $prefixeTable.'user_cache');
 define('CADDIE_TABLE', $prefixeTable.'caddie');
+define('UPGRADE_TABLE', $prefixeTable.'upgrade');
 ?>