Using email from django for announcer plugin

[jug]

Add the following to the plugin and enable it in trac.ini (or WebAdmin) to get the AnnouncerPlugin using email addresses from your django db.

from announcerplugin.api import IAnnouncementAddressResolver
    
class DjangoEmailResolver(Component):
    implements(IAnnouncementAddressResolver)
        
    def get_address_for_name(self, name, authenticated):
        settings = self.config.get('djangoauth', 'django_settings_module')
        os.environ['DJANGO_SETTINGS_MODULE'] = settings
        from django.contrib.auth.models import User
        try:
            user = User.objects.get(username=name)
            return user.email
        except User.DoesNotExist:
            return None