Updated storage of timeout variables to allow multiple users on a site to run...

Updated storage of timeout variables to allow multiple users on a site to run scanner at the same time

README.txt

@@ -16,9 +16,11 @@ among other things.
 
 II. LIMITATIONS:
 
-1. Only works on sites using a MySQL database.
+1. A user can only have one instance of Search and Replace Scanner running at a time.  Attempting to open Scanner in two separate windows to perform replacements at the same time can lead to unknown errors if you encoutner a timeout.
 
-2. Large search and replace actions may not be completed on sites that are 
+2. Only works on sites using a MySQL database.
+
+3. Large search and replace actions may not be completed on sites that are 
 hosted in environments where PHP's max_execution_time variable can't be 
 dynamically expanded. The module automatically attempts to expand the 
 maximum execution time of a script to 10 minutes. (It's often set at 2 minutes.)  

scanner.module

@@ -614,8 +614,8 @@ function scanner_execute($searchtype = 'search') {
   $expanded = FALSE;
 
   // get process and undo data if saved from timeout
-  $processed = variable_get('scanner_partially_processed', array());
-  $undo_data = variable_get('scanner_partial_undo', array());
+  $processed = variable_get('scanner_partially_processed_'. $user->uid, array());
+  $undo_data = variable_get('scanner_partial_undo_'. $user->uid, array());
   
   unset($_SESSION['scanner_status']);
 
@@ -750,8 +750,8 @@ function scanner_execute($searchtype = 'search') {
         // if expanded environment still running out of time - shutdown process
         else {
           $shutting_down = TRUE;
-          variable_set('scanner_partially_processed', $processed);
-          variable_set('scanner_partial_undo', $undo_data);
+          variable_set('scanner_partially_processed_'. $user->uid, $processed);
+          variable_set('scanner_partial_undo_'. $user->uid, $undo_data);
           if($searchtype == 'search') {
             drupal_set_message(t('Did not have enough time to complete search.'),'error');
           }
@@ -849,8 +849,8 @@ function scanner_execute($searchtype = 'search') {
   
   // if completed
   if(!$shutting_down) {
-    variable_del('scanner_partially_processed');
-    variable_del('scanner_partial_undo');
+    variable_del('scanner_partially_processed_'. $user->uid);
+    variable_del('scanner_partial_undo_'. $user->uid);
   }
 
   if ($searchtype == 'search') {