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views.py
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views.py
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# -*- coding: utf-8 -*-
#
## This file is part of Invenio.
## Copyright (C) 2013, 2014 CERN.
##
## Invenio is free software; you can redistribute it and/or
## modify it under the terms of the GNU General Public License as
## published by the Free Software Foundation; either version 2 of the
## License, or (at your option) any later version.
##
## Invenio is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
## General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with Invenio; if not, write to the Free Software Foundation, Inc.,
## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
from flask import current_app, abort
from flask.ext.admin import BaseView as FlaskBaseView, \
AdminIndexView as FlaskAdminIndexView
from flask.ext.admin.contrib.sqla import ModelView as FlaskModelView
from flask.ext.login import current_user
from invenio.ext.sslify import ssl_required
from invenio.ext.principal import permission_required
def can_acc_action(action):
"""
Return getter/setter for can_<action> properties
"""
def fget(self):
return self.acc_authorize(action)
def fset(self, value):
setattr(self, '_can_%s' % action, value)
def fdel(self):
delattr(self, '_can_%s' % action)
return (fget, fset, fdel)
#
# Base classes
#
class BaseView(FlaskBaseView):
"""
BaseView for administration interfaces
"""
acc_view_action = None
can_view = property(*can_acc_action('view'))
def acc_authorize(self, action):
""" Check authorization for a given action """
# First check if _can_<action> is set.
if not getattr(self, '_can_%s' % action, True):
return False
# Next check if user is authorized to edit
action = getattr(self, 'acc_%s_action' % action, None)
if action:
return permission_required(action)
else:
return current_user.is_super_admin
def _handle_view(self, name, **kwargs):
"""
This method will be executed before calling any view method.
"""
if not current_user.is_authenticated():
return current_app.login_manager.unauthorized()
if not self.is_accessible():
return abort(403)
def is_accessible(self):
"""
Check if admin interface is accessible by the current user
"""
if not current_user.is_authenticated():
return False
return self.can_view
def create_blueprint(self, admin):
"""
Ensure admin is only available over SSL.
"""
self.blueprint = ssl_required(
super(BaseView, self).create_blueprint(admin)
)
return self.blueprint
class ModelView(FlaskModelView, BaseView):
"""
Invenio Admin base view for SQL alchemy models
"""
acc_edit_action = None
acc_delete_action = None
acc_create_action = None
can_delete = property(*can_acc_action('delete'))
can_edit = property(*can_acc_action('edit'))
can_create = property(*can_acc_action('create'))
class AdminIndexView(FlaskAdminIndexView, BaseView):
"""
Invenio admin index view that ensures Blueprint is being used.
"""
# Ensures that templates and static files can be found
import_name = 'flask_admin'

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