--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pytask/taskapp/utilities/request.py	Thu Jan 06 19:07:04 2011 +0530
@@ -0,0 +1,62 @@
+from datetime import datetime
+
+from django.contrib.auth.models import User
+from pytask.taskapp.models import Request, Profile
+
+def create_request(sent_by,role,sent_to=None,task=None,receiving_user=None,pynts=0):
+    """
+    creates an unreplied request, based on the passed arguments
+        sent_to - a list of users to which the request is to be sent
+        sent_by - sender of request
+        role - a two character field which represents the role requested, if role = 'PY' then sent to all admins
+        task - a requesting task (useful for sending admins a request to give Pynts to the user)
+        receiving_user - user to whom the Pynts is assigned to(useful for sending admins a request to give Pynts to the user)
+        pynts - the pynts assigned to the receiving user
+    """
+    req = Request(creation_date=datetime.now())
+    req.sent_by = sent_by
+    req.reply_date = datetime(1970,01,01)
+    req.role = role
+    req.pynts = pynts
+    if task:
+        req.task = task
+    req.save()
+    if role == 'PY':
+        admin_profiles = Profile.objects.filter(rights='AD')
+        for admin_profile in admin_profiles:
+            req.sent_to.add(admin_profile.user)
+        req.receiving_user = receiving_user
+    else:
+        req.sent_to.add(sent_to)
+    req.save()
+
+def get_request(rid, user):
+    """ see if the request is replied or if he can not view the request,
+    raise 404 error. else return request.
+    """
+
+    active_requests = user.request_sent_to.filter(is_valid=True, is_replied=False).order_by('creation_date')
+    current_requests = active_requests.filter(id=rid)
+    if current_requests:
+        current_request = current_requests[0]
+
+        try:
+            newer_request = current_request.get_next_by_creation_date(sent_to=user, is_replied=False, is_valid=True)
+            newest_request = active_requests.reverse()[0]
+            if newer_request == newest_request:
+                newest_request = None
+        except Request.DoesNotExist:
+            newer_request, newest_request = None, None
+
+        try:
+            older_request = current_request.get_previous_by_creation_date(sent_to=user, is_replied=False, is_valid=True)
+            oldest_request = active_requests[0]
+            if oldest_request == older_request:
+                oldest_request = None
+        except Request.DoesNotExist:
+            older_request, oldest_request = None, None
+
+        return newest_request, newer_request, current_request, older_request, oldest_request 
+
+    else:
+        return None, None, None, None, None