#!/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 Melange home page views.

public: how the general public sees the site home page of a Melange

  site

edit: site settings view for logged-in Developers

"""

__authors__ = [

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

  ]

from google.appengine.ext import db

from django import forms

from soc.logic import models

from soc.logic import validate

from soc.logic.models import document

from soc.views import helper

from soc.views.helper import access

from soc.views.helper import decorators

import soc.logic.models.site_settings

import soc.models.document

import soc.models.site_settings

import soc.views.helper.forms

import soc.views.helper.responses

import soc.views.helper.templates

import soc.views.helper.widgets

import soc.views.out_of_band

class DocumentForm(helper.forms.DbModelForm):

  content = forms.fields.CharField(widget=helper.widgets.TinyMCE(

      attrs={'rows':10, 'cols':40}))

  class Meta:

    """Inner Meta class that defines some behavior for the form.

    """

    #: db.Model subclass for which the form will gather information

    model = soc.models.document.Document

    #: list of model fields which will *not* be gathered by the form

    exclude = ['partial_path', 'link_name',

               'author', 'modified', 'created', 'inheritance_line']

class SiteSettingsForm(helper.forms.DbModelForm):

  """Django form displayed when creating or editing Site Settings.

  """

  class Meta:

    """Inner Meta class that defines some behavior for the form.

    """

    #: db.Model subclass for which the form will gather information

    model = soc.models.site_settings.SiteSettings

    #: list of model fields which will *not* be gathered by the form

    exclude = ['inheritance_line', 'home']

  def clean_feed_url(self):

    feed_url = self.cleaned_data.get('feed_url')

    if feed_url == '':

      # feed url not supplied (which is OK), so do not try to validate it

      return None

    if not validate.isFeedURLValid(feed_url):

      raise forms.ValidationError('This URL is not a valid ATOM or RSS feed.')

    return feed_url

DEF_SITE_HOME_EDIT_TMPL = 'soc/site/settings/edit.html'

@decorators.view

def edit(request, page=None, template=DEF_SITE_HOME_EDIT_TMPL):

  """View for Developer to edit content of Melange site home page.

  Args:

    request: the standard django request object.

    page: a soc.logic.site.page.Page object which is abstraction that combines 

      a Django view with sidebar menu info

    template: the template path to use for rendering the template.

  Returns:

    A subclass of django.http.HttpResponse with generated template.

  """

  try:

    access.checkIsDeveloper(request)

  except  soc.views.out_of_band.AccessViolationResponse, alt_response:

    return alt_response.response()

  # create default template context for use with any templates

  context = helper.responses.getUniversalContext(request)

  settings_form = None

  document_form = None

  if request.method == 'POST':

    document_form = DocumentForm(request.POST)

    settings_form = SiteSettingsForm(request.POST)

    if document_form.is_valid() and settings_form.is_valid():

      link_name = models.site_settings.logic.DEF_SITE_HOME_DOC_LINK_NAME

      partial_path = models.site_settings.logic.DEF_SITE_SETTINGS_PATH

      logged_in_id = users.get_current_user()

      author = models.user.logic.getFromFields(email=logged_in_id.email())

      properties = {

        'title': document_form.cleaned_data.get('title'),

        'short_name': document_form.cleaned_data.get('short_name'),

        'content': document_form.cleaned_data.get('content'),

        'link_name': link_name,

        'partial_path': partial_path,

        'id': logged_in_id,

        'author': author,

      }

      site_doc = document.logic.updateOrCreateFromFields(

          properties, partial_path=partial_path, link_name=link_name)

      feed_url = settings_form.cleaned_data.get('feed_url')

      site_settings = models.site_settings.logic.updateOrCreateFromFields(

          {'feed_url': feed_url, 'home': site_doc},

          path=models.site_settings.logic.DEF_SITE_SETTINGS_PATH)

      context['notice'] = 'Site Settings saved.'

  else: # request.method == 'GET'

    # try to fetch SiteSettings entity by unique key_name

    site_settings = models.site_settings.logic.getFromFields(

        path=models.site_settings.logic.DEF_SITE_SETTINGS_PATH)

    if site_settings:

      # populate form with the existing SiteSettings entity

      settings_form = SiteSettingsForm(instance=site_settings)

      # check if ReferenceProperty to home Document is valid

      try:

        site_doc = site_settings.home

      except db.Error:

        site_doc = None

    else:

      # no SiteSettings entity exists for this key_name, so show a blank form

      settings_form = SiteSettingsForm()

      site_doc = None

    if site_doc:

      # populate form with the existing Document entity

      document_form = DocumentForm(instance=site_doc)

    else:

      # no Document entity exists for this key_name, so show a blank form

      document_form = DocumentForm()

  context.update({'document_form': document_form,

                  'settings_form': settings_form })

  return helper.responses.respond(request, template, context)