#!/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.api import users

from django import http

from django import shortcuts

from django import newforms as forms

from soc.logic import out_of_band

from soc.logic import feed

from soc.logic.site import id_user

from soc.views import simple

from soc.views.helpers import custom_widgets

from soc.views.helpers import forms_helpers

from soc.views.helpers import response_helpers

from soc.views.helpers import template_helpers

import soc.models.site_settings

import soc.models.document

import soc.logic.document

import soc.logic.site.settings

class DocumentForm(forms_helpers.DbModelForm):

  content = forms.fields.CharField(widget=custom_widgets.TinyMCE())

  #link_name = forms.CharField(widget=forms.TextInput(

  #                                attrs={'readonly':'true'}))

  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',

               'user', 'modified', 'created', 'inheritance_line']

class SiteSettingsForm(forms_helpers.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 feed.isFeedURLValid(feed_url):

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

    return feed_url

DEF_SITE_SETTINGS_PATH = 'site'

DEF_SITE_HOME_DOC_LINK_NAME = 'home'

DEF_SITE_HOME_PUBLIC_TMPL = 'soc/site/home/public.html'

def public(request, template=DEF_SITE_HOME_PUBLIC_TMPL):

  """How the "general public" sees the Melange site home page.

  Args:

    request: the standard django request object.

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

  Returns:

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

  """

  # create default template context for use with any templates

  context = response_helpers.getUniversalContext(request)

  site_settings = soc.logic.site.settings.getSiteSettings(DEF_SITE_SETTINGS_PATH)

  if site_settings:

    context.update({'site_settings': site_settings})

    site_doc = site_settings.home

    if site_doc:

      site_doc.content = template_helpers.unescape(site_doc.content)

      context.update({'site_document': site_doc})

  return response_helpers.respond(request, template, context)

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

def edit(request, template=DEF_SITE_HOME_EDIT_TMPL):

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

  Args:

    request: the standard django request object.

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

  Returns:

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

  """

  # create default template context for use with any templates

  context = response_helpers.getUniversalContext(request)

  logged_in_id = users.get_current_user()

  alt_response = simple.getAltResponseIfNotDeveloper(request, context, 

                                                     id=logged_in_id)

  if alt_response:

    # not a developer

    return alt_response

  alt_response = simple.getAltResponseIfNotLoggedIn(request, context, 

                                                    id=logged_in_id)

  if alt_response:

    # not logged in

    return alt_response

  alt_response = simple.getAltResponseIfNotUser(request, context, 

                                                        id = logged_in_id)

  if alt_response:

    # no existing User entity for logged in Google Account. User entity is 

    # required for creating Documents

    return alt_response

  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():

      title = document_form.cleaned_data.get('title')

      link_name = DEF_SITE_HOME_DOC_LINK_NAME

      short_name = document_form.cleaned_data.get('short_name')

      abstract = document_form.cleaned_data.get('abstract')

      content = document_form.cleaned_data.get('content')

      site_doc = soc.logic.document.updateOrCreateDocument(

          partial_path=DEF_SITE_SETTINGS_PATH, link_name=link_name,

          title=title, short_name=short_name, abstract=abstract,

          content=content, user=id_user.getUserFromId(logged_in_id))

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

      site_settings = soc.logic.site.settings.updateOrCreateSiteSettings(

          DEF_SITE_SETTINGS_PATH, home=site_doc, feed_url=feed_url)

      context.update({'submit_message': 'Site Settings saved.'})

  else: # request.method == 'GET'

    # try to fetch SiteSettings entity by unique key_name

    site_settings = soc.logic.site.settings.getSiteSettings(

        DEF_SITE_SETTINGS_PATH)

    if site_settings:

      # populate form with the existing SiteSettings entity

      settings_form = SiteSettingsForm(instance=site_settings)

      site_doc = site_settings.home

    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 response_helpers.respond(request, template, context)