[attribute_aggregator] Refine AttributeData and UserAliasInSource classes

* Define Meta and unicode of UserAliasInSource Class
    * AttributeData have methods that return empty dict, not None.

acs/attribute_aggregator/models.py

@@ -39,6 +39,7 @@ logger = logging.getLogger('attribute_aggregator')
 
 class AttributeSource(models.Model):
     name = models.CharField(max_length = 200, unique=True)
+    namespace = models.CharField(max_length = 200,  blank=True, null=True)
 
     def __unicode__(self):
         return self.name
@@ -58,6 +59,13 @@ def get_source_from_name(name):
         return None
 
 
+def get_all_sources():
+    try:
+        return AttributeSource.objects.all()
+    except:
+        return None
+
+
 class LdapSource(AttributeSource):
     server = models.CharField(max_length=200, unique=True)
     user = models.CharField(max_length=200, blank=True, null=True)
@@ -68,13 +76,26 @@ class LdapSource(AttributeSource):
     certificate = models.TextField(blank=True)
     is_auth_backend = models.BooleanField(default=False)
 
+    def __init__(self, *args, **kwargs):
+        super(LdapSource, self).__init__(*args, **kwargs)
+        self.namespace = "X500"
+
 
 class UserAliasInSource(models.Model):
-    name = models.CharField(max_length = 200, unique=True)
+    name = models.CharField(max_length = 200)
     source = models.ForeignKey(AttributeSource,
         verbose_name = _('Attribute Source'))
     user = models.ForeignKey(User, related_name='user_alias_in_source')
 
+    class Meta:
+        verbose_name = _('alias in source')
+        verbose_name_plural = _('aliases in source')
+        unique_together = ("name", "source")
+
+    def __unicode__(self):
+        return "alias %s of user %s in %s" % (self.name, self.user,
+            self.source)
+
 
 class AttributeData:
 
@@ -129,6 +150,9 @@ class AttributeData:
     def get_values(self):
         return self.values
 
+    def get_converted_values(self):
+        return [convert_from_string(self.definition, value) for value in self.values]
+
     def get_source(self):
         try:
             return AttributeSource.objects.get(pk=self.source_id)
@@ -205,7 +229,7 @@ class UserAttributeProfile(models.Model):
             l = loads(str(self.data))
             return l
         except:
-            return None
+            return []
 
     def get_data_of_definition(self, definition, in_list=None):
         l = None
@@ -214,40 +238,42 @@ class UserAttributeProfile(models.Model):
         else:
             l = self.get_all_data()
         if not l:
-            return None
+            return []
         return [d for d in l if d.get_definition() == definition]
 
     def get_freshest_data_of_definition(self, definition):
         l = self.get_data_of_definition(definition)
         if not l:
-            return None
+            return []
         l.sort(key=lambda x: x.expiration_date, reverse=True)
         return l[0]
 
     def get_data_of_source(self, source, in_list=None):
-        l = None
+        l = []
         if in_list:
             l = in_list
         else:
             l = self.get_all_data()
         if not l or not isinstance(source, AttributeSource):
-            return None
+            return []
         return [d for d in l if d.get_source_id() == source.id]
 
     def get_data_of_source_by_name(self, source):
         l = self.get_all_data()
         if not l:
-            return None
-        s = None
+            return []
+        s = []
         try:
             s = AttributeSource.objects.get(name=source)
         except:
-            return None
+            return []
         return [d for d in l if d.get_source_id() == s.id]
 
     def get_data_of_definition_and_source(self, definition, source):
-        return self.get_data_of_definition(definition,
-            in_list=self.get_data_of_source(source))
+        in_list = self.get_data_of_source(source)
+        if not in_list:
+            return []
+        return self.get_data_of_definition(definition, in_list=in_list)
 
     def get_data_of_definition_and_source_by_name(self, definition, source):
         return self.get_data_of_definition(definition,