Continue config the backup moduel

apps/app_registry/models.py

@@ -4,6 +4,7 @@ import datetime
 import logging
 
 from django.db import models
+from django.db import DatabaseError, transaction
 from django.utils.translation import ugettext_lazy as _
 from django.utils.translation import ugettext
 from django.contrib.contenttypes.models import ContentType
@@ -17,8 +18,46 @@ logger = logging.getLogger(__name__)
 
 
 class App(TranslatableLabelMixin, LiveObjectMixin, models.Model):
+    translatables = ['label', 'description']
+
+    class UnableToRegister(Exception):
+        pass
+    
     name = models.CharField(max_length=64, verbose_name=_(u'name'), unique=True)
     icon = models.CharField(max_length=64, verbose_name=_(u'icon'), blank=True)
+    dependencies = models.ManyToManyField('self', verbose_name=_(u'dependencies'), symmetrical=False, blank=True, null=True)
+    #version
+    #top_urls
+    #namespace
+
+    @classmethod
+    @transaction.commit_on_success
+    def register(cls, name, label, icon=None, description=None):
+        try:
+            app, created = App.objects.get_or_create(name=name)
+        except DatabaseError:
+            transaction.rollback()
+            raise UnableToRegister
+        else:
+            app.label = label
+            if icon:
+                app.icon = icon
+            if description:
+                app.description = description
+            app.dependencies.clear()
+            app.save()
+            return app    
+    
+    def set_dependencies(self, app_names):
+        for app_name in app_names:
+            app = App.objects.get(name=app_name)
+            self.dependencies.add(app)
+            
+    def set_backup(self, *args, **kwargs):
+        return AppBackup(self, *args, **kwargs)
+        
+    def __unicode__(self):
+        return unicode(self.label)
 
     class Meta:
         ordering = ('name', )