#!/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 google.appengine.ext import db

from django import http

from django import shortcuts

from django import newforms as forms

from soc.logic import models

from soc.logic import out_of_band

from soc.logic import validate

from soc.logic.models import document

from soc.logic.site import id_user

from soc.views import simple

from soc.views import helper

from soc.views.helper import access

import soc.logic.models.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())

  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(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_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 = helper.responses.getUniversalContext(request)

  site_settings = soc.logic.models.settings.logic.getFromFields(path=DEF_SITE_SETTINGS_PATH)

  if site_settings:

    context['site_settings'] = site_settings

    # check if ReferenceProperty to home Document is valid

    try:

      site_doc = site_settings.home

    except db.Error:

      site_doc = None

    if site_doc:

      site_doc.content = helper.templates.unescape(site_doc.content)

      context['site_document'] = site_doc

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

  """

  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 = DEF_SITE_HOME_DOC_LINK_NAME

      partial_path=DEF_SITE_SETTINGS_PATH

      logged_in_id = users.get_current_user()

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

      properties = {

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

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

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

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

        'link_name' : link_name,

        'partial_path' : partial_path,

        'id' : logged_in_id,

        'user' : user,

      }

      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.settings.logic.updateOrCreateFromFields(

          {'feed_url' : feed_url, 'home' : site_doc}, path=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.settings.logic.getFromFields(

        path=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)