#!/usr/bin/python2.5

#

# Copyright 2008 the Melange authors.

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

#   http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

"""Helpers used to display various views that are forms.

"""

__authors__ = [

  '"Pawel Solyga" <pawel.solyga@gmail.com>',

  ]

import os

from google.appengine.api import users

from django import http

from django import shortcuts

IS_DEV = os.environ['SERVER_SOFTWARE'].startswith('Dev')

# DeadlineExceededError can live in two different places

try:

  # When deployed

  from google.appengine.runtime import DeadlineExceededError

except ImportError:

  # In the development server

  from google.appengine.runtime.apiproxy_errors import DeadlineExceededError

def respond(request, template, params=None):

  """Helper to render a response, passing standard stuff to the response.

  Args:

    request: The request object.

    template: The template name; '.html' is appended automatically.

    params: A dict giving the template parameters; modified in-place.

  Returns:

    Whatever render_to_response(template, params) returns.

  Raises:

    Whatever render_to_response(template, params) raises.

  """

  if params is None:

    params = {}

  params['request'] = request

  params['is_admin'] = users.is_current_user_admin()

  params['is_dev'] = IS_DEV

  params['sign_in'] = users.create_login_url(request.path)

  params['sign_out'] = users.create_logout_url(request.path)

  try:

    return shortcuts.render_to_response(template, params)

  except DeadlineExceededError:

    logging.exception('DeadlineExceededError')

    return http.HttpResponse('DeadlineExceededError')

  except MemoryError:

    logging.exception('MemoryError')

    return http.HttpResponse('MemoryError')

  except AssertionError:

    logging.exception('AssertionError')

    return http.HttpResponse('AssertionError')