--- a/app/soc/views/helper/decorators.py	Sun Sep 27 18:18:53 2009 +0200
+++ b/app/soc/views/helper/decorators.py	Sun Sep 27 23:31:39 2009 +0200
@@ -31,6 +31,7 @@
 from django.utils.translation import ugettext
 
 from soc.logic import dicts
+from soc.logic import tasks
 from soc.views.helper import responses
 
 
@@ -116,3 +117,97 @@
     return func(self, request, access_type, *args, **kwargs)
 
   return wrapper
+
+
+def task(func):
+  """Task decorator wrapper method
+  """
+
+  @wraps(func)
+  def wrapper(request, *args, **kwargs):
+    """Decorator wrapper method
+    """
+
+    try:
+      return func(request, *args, **kwargs)
+    except tasks.FatalTaskError, error:
+      logging.exception(error)
+      return tasks.terminateTask()
+    except Exception, exception:
+      logging.exception(exception)
+      return tasks.repeatTask()
+
+  return wrapper
+
+
+def iterative_task(func):
+  """Iterative wrapper method
+  """
+
+  @wraps(func)
+  def wrapper(request, *args, **kwargs):
+    """Decorator wrapper method
+
+    Params usage:
+      logic: name of the logic for the data model to iterate through
+      filter: a dict for the properties that the entities should have
+      order: a list with the sort order
+      json: json object with additional parameters
+
+    Returns:
+      Standard http django response
+    """
+
+    post_dict = request.POST
+
+    if 'logic' not in post_dict:
+       return tasks.terminateTask()
+
+    _temp = __import__(post_dict['logic'], globals(), locals(), ['logic'], -1)
+    logic = _temp.logic
+
+    filter = None
+    if 'filter' in post_dict:
+      filter = simplejson.loads(post_dict['filter'])
+
+    order = None
+    if 'order' in post_dict:
+      order = simplejson.loads(post_dict['order'])
+
+    start_key = None
+    if 'next_key' in post_dict:
+      start_key = db.Key(post_dict['start_key'])
+
+    json = None
+    if 'json' in post_dict:
+      json = post_dict['json']
+
+    entities, start_key = logic.getBatchOfData(filter, order, start_key)
+
+    try:
+      new_json = func(request, entities=entities, json=json, *args, **kwargs)
+    except tasks.FatalTaskError, error:
+      logging.error(error)
+      return tasks.terminateTask()
+    except Exception, exception:
+      logging.error(exception)
+      return tasks.repeatTask()
+
+    if start_key is None:
+      logging.debug('Task sucessfully completed')
+    else:
+      context = post_dict.copy()
+
+      if 'json' in context:
+        del context['json']
+
+      context.update({'start_key': start_key})
+
+      if new_json is not None:
+        context.update({'json': new_json})
+
+      tasks.startTask(url=request.path, context=context)
+
+    return tasks.terminateTask()
+
+  return wrapper