Index: index.php
===================================================================
--- index.php	(revision 5241)
+++ index.php	(working copy)
@@ -25,15 +25,15 @@
   include("../connect/connect.php");
   include("../lib/requests.inc");
 
+  //Check the number of existing requests by that ip address and downgrade if needed
+  $SQL = sprintf ("SELECT COUNT(*) FROM tiles_queue WHERE `status` < %d AND `ip` = '%s'",
+                  REQUEST_DONE,
+                  $_SERVER['REMOTE_ADDR']);
+  $Result = mysql_query($SQL);
+    if ($row = mysql_fetch_row($Result) and $row[0] >= 20) 
+      if ($row[0] >= 100) {$P = 3;} else {$P=($P<2)?2:$P;}
+
   if (!requestExists($X,$Y,$Z,NULL)){
-     //Check the number of existing requests by that ip address and downgrade if needed
-     $SQL = sprintf ("SELECT COUNT(*) FROM tiles_queue WHERE `status` < %d AND `ip` = '%s'",
-	REQUEST_DONE,
-	$_SERVER['REMOTE_ADDR']);
-     $Result = mysql_query($SQL);
-     if ($row = mysql_fetch_row($Result) and $row[0] >= 20) 
-       if ($row[0] >= 100) {$P = 3;} else {$P=($P<2)?2:$P;}
-
      $SQL = sprintf(
        "INSERT into tiles_queue (`x`,`y`,`z`,`status`,`src`,`date`,`priority`,`ip`) values (%d,%d,%d,%d,'%s',now(),%s,'%s');", 
        $X, 
@@ -51,7 +51,28 @@
      }
      print "OK\n";
   } else {
-     print "Already in queue\n";
+     $SQL = sprintf("SELECT `priority` FROM tiles_queue WHERE `x`=%d AND `y`=%d AND `z`=%d AND `status`=%d", 
+                    $X, 
+                    $Y, 
+                    $Z, 
+                    REQUEST_PENDING);
+     $Result = mysql_query($SQL);
+     if ($row = mysql_fetch_assoc($Result) and $row['priority'] > $P) {
+       $SQL = sprintf("UPDATE `tiles_queue` SET `priority`=%d, `date`=now() WHERE `x`=%d AND `y`=%d AND `z`=%d AND `status`=%d",
+                      $P,
+                      $X,
+                      $Y,
+                      $Z,
+                      REQUEST_PENDING);
+       mysql_query($SQL);
+       if (mysql_error()) {
+         printf("Database error %s\n", mysql_error());
+         exit;
+       }
+       print "OK\n";
+     } else {
+       print "Already in queue\n";
+     }
   }