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−#!/usr/bin/python2.5
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−#
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−# Copyright 2008 the Melange authors.
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−#
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−# Licensed under the Apache License, Version 2.0 (the "License");
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−# you may not use this file except in compliance with the License.
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−# You may obtain a copy of the License at
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−#
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−#   http://www.apache.org/licenses/LICENSE-2.0
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−#
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−# Unless required by applicable law or agreed to in writing, software
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−# distributed under the License is distributed on an "AS IS" BASIS,
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−# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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−# See the License for the specific language governing permissions and
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−# limitations under the License.
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−
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−"""Helpers used to render response.
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−"""
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−
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−__authors__ = [
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−  '"Todd Larsen" <tlarsen@google.com>',
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−  '"Pawel Solyga" <pawel.solyga@gmail.com>',
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−  ]
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−
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−
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−from google.appengine.api import users
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−
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−from django import http
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−from django.template import loader
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−
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−from soc.logic import accounts
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−from soc.logic import system
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−from soc.logic.models import site
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−from soc.views import helper
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−from soc.views.sitemap import sidebar
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−
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−import soc.logic
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−import soc.logic.models.user
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−import soc.views.helper.requests
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−
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−
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−def respond(request, template, context=None, response_args=None):
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−  """Helper to render a response, passing standard stuff to the response.
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−
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−  Args:
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−    request: the Django HTTP request object
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−    template: the template (or search list of templates) to render
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−    context: the context supplied to the template (implements dict)
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−    response_args: keyword arguments passed to http.HttpResponse()
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−      (response_args['content'] is created with
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−      render_to_string(template, dictionary=context) if it is not present)
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−
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−  Returns:
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−    django.shortcuts.render_to_response(template, context) results
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−
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−  Raises:
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−    Any exceptions that django.template.loader.render_to_string() or
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−    django.http.HttpResponse() might raise.
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−  """
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−
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−  if not context:
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−    context = getUniversalContext(request)
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−
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−  if response_args is None:
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−    response_args = {}
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−
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−  response_args['content'] = response_args.get(
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−      'content', loader.render_to_string(template, dictionary=context))
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−  return http.HttpResponse(**response_args)
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−
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−
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−def getUniversalContext(request):
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−  """Constructs a template context dict will many common variables defined.
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−  
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−  Args:
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−    request: the Django HTTP request object
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−
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−  Returns:
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−    a new context dict containing:
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−    
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−    {
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−      'request': the Django HTTP request object passed in by the caller
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−      'account': the logged-in Google Account if there is one
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−      'user': the User entity corresponding to the Google Account in
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−        context['account']
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−      'is_admin': True if users.is_current_user_admin() is True
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−      'is_debug': True if system.isDebug() is True
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−      'sign_in': a Google Account login URL
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−      'sign_out': a Google Account logout URL
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−      'sidebar_menu_html': an HTML string that renders the sidebar menu
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−    }
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−  """
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−
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−  account = users.get_current_user()
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−
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−  context = {}
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−  context['request'] = request
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−
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−  if account:
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−    context['account'] = account
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−    context['user'] = soc.logic.models.user.logic.getForFields(
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−        {'account': account}, unique=True)
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−    context['is_admin'] = accounts.isDeveloper(account=account)
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−
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−  context['is_debug'] = system.isDebug()
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−  context['sign_in'] = users.create_login_url(request.path)
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−  context['sign_out'] = users.create_logout_url(request.path)
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−  context['sidebar_menu_items'] = sidebar.SIDEBAR
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−
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−  settings = site.logic.getFromFields(
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−      scope_path=site.logic.DEF_SITE_SCOPE_PATH,
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−      link_id=site.logic.DEF_SITE_LINK_ID)
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−  
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−  if settings:
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−    context['ga_tracking_num'] = settings.ga_tracking_num
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−  
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−  return context
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−
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−
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−def redirectToChangedSuffix(
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−    request, old_suffix, new_suffix=None, params=None):
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−  """Changes suffix of URL path and returns an HTTP redirect response.
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−  
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−  Args:
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−    request: the Django HTTP request object; redirect path is derived from
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−      request.path
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−    old_suffix, new_suffix, params:  see helper.requests.replaceSuffix()
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−      
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−  Returns:
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−    a Django HTTP redirect response pointing to the altered path.
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−  """
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−  path = helper.requests.replaceSuffix(request.path, old_suffix, new_suffix,
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−                                       params=params)
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−  return http.HttpResponseRedirect(path)