# HG changeset patch
# User Peter Sanchez <petersanchez@gmail.com>
# Date 1308871368 25200
#      Thu Jun 23 16:22:48 2011 -0700
# Node ID 0fb7fc65d81c7bc9f8d1546d65f6ded77c5ef94c
# Parent  03bebd48d1e6eba95d43890a18e6eebd520a4685
Added managers and store_callback functionality

diff --git a/callback/callback.py b/callback/callback.py
--- a/callback/callback.py
+++ b/callback/callback.py
@@ -1,4 +1,5 @@
 from django.db import models
+from models import CallbackMap
 from base import CallbackException, CallbackBase
 
 
@@ -26,15 +27,18 @@
         for model, cls in self._callbacks.items():
             if isinstance(dest_model, model):
                 return cls()
-        return None
+        raise CallbackException('Model class is not registered.')
+
+    def store_callback(self, model_instance):
+        if not model_instance.pk:
+            model_instance.save()
+
+        cls = self.get_callback_class(model_instance)
+        return CallbackMap.objects.store_callback(model_instance)
 
     def process_callback(self, callback_instance):
         model = callback_instance.content_object
         cls = self.get_callback_class(model)
-        if cls is None:
-            raise CallbackException(
-                'Model class is not registered.'
-            )
         try:
             cls.process(model)
         except:
diff --git a/callback/managers.py b/callback/managers.py
new file mode 100644
--- /dev/null
+++ b/callback/managers.py
@@ -0,0 +1,17 @@
+import random
+import hashlib
+from django.db import models
+from django.contrib.auth.models import User
+
+
+class CallbackMapManager(models.Manager):
+    def generate_hash(self):
+        salt = hashlib.sha1(str(random.random())).hexdigest()[:5]
+        random_string = User.objects.make_random_password()
+        return hashlib.sha1(salt + random_string).hexdigest()
+
+    def store_callback(self, model_instance):
+        hash_id = self.generate_hash()
+        while self.get_query_set().filter(hash_id=hash_id).exists():
+            hash_id = self.generate_hash()
+        return self.create(hash_id=hash_id, content_object=model_instance)
diff --git a/callback/models.py b/callback/models.py
--- a/callback/models.py
+++ b/callback/models.py
@@ -2,6 +2,7 @@
 from django.db import models
 from django.contrib.contenttypes.models import ContentType
 from django.contrib.contenttypes import generic
+from managers import CallbackMapManager
 
 
 class CallbackMap(models.Model):
@@ -13,6 +14,8 @@
     created_on = models.DateTimeField(default=datetime.datetime.now)
     updated_on = models.DateTimeField(default=datetime.datetime.now)
 
+    objects = CallbackMapManager()
+
     # Methods
     def save(self, *args, **kwargs):
         if self.id: