add uniform globals to eval() used in different places

wcs/fields.py

@@ -863,7 +863,7 @@ class PageField(Field):
         data = get_dict_with_varnames(formdef.fields, dict)
 
         try:
-            if eval(self.condition, data):
+            if eval(self.condition, get_publisher().get_global_eval_dict(), data):
                 return True
         except Exception, e:
             get_logger().warn('failed to evaluate condition "%s" (%r)' % (self.condition, e))

wcs/qommon/publisher.py

@@ -129,6 +129,10 @@ class QommonPublisher(Publisher):
                     urllib.quote(req.environ.get('SCRIPT_NAME')))
         return 'http://%s/backoffice' % os.path.basename(self.app_dir)
 
+    def get_global_eval_dict(self):
+        import datetime
+        return {'datetime': datetime}
+
     def format_publish_error(self, exc):
         get_response().filter = {}
         if isinstance(exc, errors.AccessError) and hasattr(exc, 'render'):

wcs/wf/jump.py

@@ -58,7 +58,7 @@ class JumpWorkflowStatusItem(WorkflowStatusJumpItem):
         if self.condition:
             variables = get_publisher().substitutions.get_context_variables()
             try:
-                condition = eval(self.condition, variables)
+                condition = eval(self.condition, get_publisher().get_global_eval_dict(), variables)
             except:
                 get_publisher().notify_of_exception(sys.exc_info())
                 condition = False

wcs/workflows.py

@@ -490,7 +490,7 @@ class WorkflowStatusItem:
             return var
         vars = get_publisher().substitutions.get_context_variables()
         try:
-            return eval(var[1:], vars)
+            return eval(var[1:], get_publisher().get_global_eval_dict(), vars)
         except:
             return var