#!/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.

"""Site-wide sidebar menu creation.

"""

__authors__ = [

  '"Todd Larsen" <tlarsen@google.com>',

  ]

from google.appengine.api import users

from django.utils import datastructures

from soc.logic import menu

from soc.logic.site import id_user

from soc.logic.site import map

def buildUserSidebar(id=None, **ignored):

  """Returns a list of menu items for the User portion of the sidebar.

  Args:

    id: a Google Account (users.User) object; default is None, in which

      case users.get_current_user() is called 

    **ignored: other keyword arguments supplied to other sidebar builder

      functions, but ignored by this one

  """

  if id is None:

    id = users.get_current_user()

  if not id:

    return [map.user_signin.makeMenuItem()]

  return [map.user_signout.makeMenuItem()]

def buildSiteSidebar(is_admin=None, **ignored):

  """Returns a list of menu items for the Developer portion of the sidebar.

  Args:

    is_admin: Boolean indicating that current user is a "Developer"

      (site super-user); default is None, in which case

      id_user.isIdDeveloper() is called 

    **ignored: other keyword arguments supplied to other sidebar builder

      functions, but ignored by this one

  """

  if is_admin is None:

    is_admin = id_user.isIdDeveloper()

  if not is_admin:

    # user is either not logged in or not a "Developer", so return no menu

    return None

  return [map.site_home_edit.makeMenuItem()]

def buildProgramsSidebar(**unused):

  """Mock-up for Programs section of sidebar menu.

  Args:

    **unused: all keyword arguments are currently unused in this mock-up

  TODO: actually implement this once Program entities are present in the

    Datastore.

  """

  return [

    menu.MenuItem(

      'Google Summer of Code',

      value='/program/gsoc2009/home',

      sub_menu=menu.Menu(items=[

        menu.MenuItem(

          'Community',

          value='/program/gsoc2009/community'),

        menu.MenuItem(

          'FAQs',

          value='/program/gsoc2009/docs/faqs'),

        menu.MenuItem(

          'Terms of Service',

          value='/program/gsoc2009/docs/tos'),

        ]

      )

    ),

    menu.MenuItem(

      'Google Highly Open Participation',

      value='/program/ghop2008/home',

      sub_menu=menu.Menu(items=[

        menu.MenuItem(

          'Community',

          value='/program/ghop2008/community'),

        menu.MenuItem(

          'FAQs',

          value='/program/ghop2008/docs/faqs'),

        menu.MenuItem(

          'Contest Rules',

          value='/program/ghop2008/docs/rules'),

        ]

      )

    ),

  ]

DEF_SIDEBAR_BUILDERS = [

  buildUserSidebar,

  buildSiteSidebar,

  buildProgramsSidebar,

]

def buildSidebar(path=None, builders=DEF_SIDEBAR_BUILDERS, **builder_args):

  """Calls all sidebar builders to construct the sidebar menu.

  Args:

    builders: list of functions that take context as a single

      argument; default is the list of sidebar builder functions present

      in soc.logic.site.sidebar

    **builder_args: keyword arguments passed to each sidebar builder function

  Returns:

    an soc.logic.menu.Menu object containing the sidebar menu items 

  """

  menu_items = []

  # call each of the sidebar builders and append any menu items they create

  for builder in builders:

    built_items = builder(**builder_args)

    if built_items:

      menu_items.extend(built_items)

  # try to determine which of the menu items is the current path, to indicate

  # that it is "selected"

  if not path:

    # path argument not supplied, so see if an HTTP request object was

    # supplied in the builder_args

    request = builder_args.get('request')

    if request:

      # there is an HTTP request object, so use the path stored in it

      path = request.path

  if path:

    # TODO(tlarsen): scan through list and mark current request.path as "selected"

    pass

  return menu.Menu(items=menu_items)