Added a new "auth" field to the user table. This field contains the

authentication mechanism used to create that user record.

Also added code to upgrade existing systems to have entries in that
field, and for new users to also have that field defined.

This will allow us to later improve the login procedure to be able to
handle various types of authentication.

lib/db/postgres7.php

@@ -549,6 +549,20 @@ function main_upgrade($oldversion=0) {
         set_field('blocks', 'version', 2004081200, 'name', 'course_list');
     }
 
+    if ($oldversion < 2004081500) {  // Adding new "auth" field to user table to allow more flexibility
+        table_column('user', '', 'auth', 'varchar', '20', '', 'manual', 'not null', 'id');
+
+        execute_sql("UPDATE {$CFG->prefix}user SET auth = 'manual'");  // Set everyone to 'manual' to be sure
+
+        if ($admins = get_admins()) {   // Set all the NON-admins to whatever the current auth module is
+            $adminlist = array();
+            foreach ($admins as $user) {
+                $adminlist[] = $user->id; 
+            }
+            $adminlist = implode(',', $adminlist);
+            execute_sql("UPDATE {$CFG->prefix}user SET auth = '$CFG->auth' WHERE id NOT IN ($adminlist)");
+        }
+    }
 
     return $result;