#!/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.

"""Views for Host profiles.

"""

__authors__ = [

    '"Sverre Rabbelier" <sverre@rabbelier.nl>',

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

  ]

from google.appengine.api import users

from django import forms

from django.utils.translation import ugettext_lazy

from soc.logic import dicts

from soc.logic import validate

from soc.logic.models import user as user_logic

from soc.views import helper

from soc.views import out_of_band

from soc.views.helper import access

from soc.views.models import base

import soc.models.linkable

import soc.models.user

import soc.logic.models.user

import soc.views.helper

class CreateForm(helper.forms.BaseForm):

  """Django form displayed when creating a User.

  """

  email = forms.EmailField(

      label=soc.models.user.User.account.verbose_name,

      help_text=soc.models.user.User.account.help_text)

  link_id = forms.CharField(

      label=soc.models.user.User.link_id.verbose_name,

      help_text=soc.models.linkable.Linkable.link_id.help_text)

  name = forms.CharField(

      label=soc.models.user.User.name.verbose_name,

      help_text=soc.models.user.User.name.help_text)

  is_developer = forms.BooleanField(required=False,

      label=soc.models.user.User.is_developer.verbose_name,

      help_text=soc.models.user.User.is_developer.help_text)

  class Meta:

    model = None

  def clean_link_id(self):

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

    if not validate.isLinkIdFormatValid(link_id):

      raise forms.ValidationError("This link ID is in wrong format.")

    properties = {'link_id': link_id}

    user = soc.logic.models.user.logic.getForFields(properties, unique=True)

    link_id_user = soc.logic.models.user.logic.getForFields(properties,

                                                            unique=True)

    key_name = self.data.get('key_name')

    if key_name:

      key_name_user = user_logic.logic.getFromKeyName(key_name)

      if (link_id_user and key_name_user

          and (link_id_user.account != key_name_user.account)):

        raise forms.ValidationError("This link ID is already in use.")

    return link_id

  def clean_email(self):

    form_account = users.User(email=self.cleaned_data.get('email'))

    key_name = self.data.get('key_name')

    if key_name:

      user = user_logic.logic.getFromKeyName(key_name)

      old_email = user.account.email()

    else:

      old_email = None

    new_email = form_account.email()

    if new_email != old_email \

        and user_logic.logic.getForFields({'email': new_email}, unique=True):

      raise forms.ValidationError("This account is already in use.")

    return self.cleaned_data.get('email')

class EditForm(CreateForm):

  """Django form displayed when editing a User.

  """

  key_name = forms.CharField(widget=forms.HiddenInput)

class UserForm(helper.forms.BaseForm):

  """Django form displayed when creating or editing a User.

  """

  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.user.User

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

    exclude = ['account', 'former_accounts', 'is_developer',

               'inheritance_line']

  def clean_link_id(self):

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

    if not validate.isLinkIdFormatValid(link_id):

      raise forms.ValidationError("This link ID is in wrong format.")

    user = soc.logic.models.user.logic.getForFields({'link_id': link_id},

                                          unique=True)

    # Get the currently logged in user account

    current_account = users.get_current_user()

    if user:

      if current_account != user.account:

        raise forms.ValidationError("This link ID is already in use.")

    return link_id

class View(base.View):

  """View methods for the User model.

  """

  DEF_USER_ACCOUNT_INVALID_MSG_FMT = ugettext_lazy(

    'The <b><i>%(email)s</i></b> account cannot be used with this site, for'

    ' one or more of the following reasons:'

    '<ul>'

    ' <li>the account is invalid</li>'

    ' <li>the account is already attached to a User profile and cannot be'

    ' used to create another one</li>'

    ' <li>the account is a former account that cannot be used again</li>'

    '</ul>')

  def __init__(self, original_params=None):

    """Defines the fields and methods required for the base View class

    to provide the user with list, public, create, edit and delete views.

    Params:

      original_params: a dict with params for this View

    """

    self._logic = soc.logic.models.user.logic

    params = {}

    params['name'] = "User"

    params['name_short'] = "User"

    params['name_plural'] = "Users"

    params['url_name'] = "user"

    params['module_name'] = "user"

    params['edit_form'] = EditForm

    params['create_form'] = CreateForm

    # TODO(tlarsen) Add support for Django style template lookup

    params['public_template'] = 'soc/user/public.html'

    params['delete_redirect'] = '/' + params['url_name'] + '/list'

    params['sidebar_heading'] = 'Users'

    params = dicts.merge(original_params, params)

    base.View.__init__(self, params=params)

  EDIT_SELF_TMPL = 'soc/user/edit_self.html'

  def editSelf(self, request, page_name=None, params=None, **kwargs):

    """Displays User self edit page for the entity specified by **kwargs.

    Args:

      request: the standard Django HTTP request object

      page_name: the page name displayed in templates as page and header title

      params: a dict with params for this View

      kwargs: The Key Fields for the specified entity

    """

    rights = {}

    rights['any_access'] = [access.checkIsLoggedIn]

    rights['unspecified'] = [access.deny]

    rights['editSelf'] = [access.allow]

    try:

      self.checkAccess('editSelf', request, rights=rights)

    except out_of_band.Error, error:

      return error.response(request, template=self.EDIT_SELF_TMPL)

    new_params = {}

    new_params['edit_template'] = self.EDIT_SELF_TMPL

    new_params['rights'] = rights

    params = dicts.merge(params, new_params)

    params = dicts.merge(params, self._params)

    account = users.get_current_user()

    properties = {'account': account}

    user = soc.logic.models.user.logic.getForFields(properties, unique=True)

    # create default template context for use with any templates

    context = helper.responses.getUniversalContext(request)

    if request.method == 'POST':

      form = UserForm(request.POST)

      if form.is_valid():

        new_link_id = form.cleaned_data.get('link_id')

        properties = {

          'link_id': new_link_id,

          'name': form.cleaned_data.get("name"),

          'account': account,

        }

        # check if user account is not in former_accounts

        # if it is show error message that account is invalid

        if soc.logic.models.user.logic.isFormerAccount(account):

          msg = self.DEF_USER_ACCOUNT_INVALID_MSG_FMT % {

            'email': account.email()}

          error = out_of_band.Error(msg)

          return error.response(request, template=self.EDIT_SELF_TMPL,

                                context=context)

        user = soc.logic.models.user.logic.updateOrCreateFromFields(

            properties, {'link_id': new_link_id})

        # redirect to /user/profile?s=0

        # (causes 'Profile saved' message to be displayed)

        return helper.responses.redirectToChangedSuffix(

            request, None, params=params['edit_params'])

    else: # request.method == 'GET'

      if user:

        # is 'Profile saved' parameter present, but referrer was not ourself?

        # (e.g. someone bookmarked the GET that followed the POST submit)

        if (request.GET.get(self.DEF_SUBMIT_MSG_PARAM_NAME)

            and (not helper.requests.isReferrerSelf(request))):

          # redirect to aggressively remove 'Profile saved' query parameter

          return http.HttpResponseRedirect(request.path)

        # referrer was us, so select which submit message to display

        # (may display no message if ?s=0 parameter is not present)

        context['notice'] = (

            helper.requests.getSingleIndexedParamValue(

                request, self.DEF_SUBMIT_MSG_PARAM_NAME,

                values=params['save_message']))

        # populate form with the existing User entity

        form = UserForm(instance=user)

      else:

        if request.GET.get(self.DEF_SUBMIT_MSG_PARAM_NAME):

          # redirect to aggressively remove 'Profile saved' query parameter

          return http.HttpResponseRedirect(request.path)

        # no User entity exists for this Google Account, so show a blank form

        form = UserForm()

    context['form'] = form

    template = params['edit_template']

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

  def _editGet(self, request, entity, form):

    """See base.View._editGet().

    """

    # fill in the email field with the data from the entity

    form.fields['email'].initial = entity.account.email()

  def _editPost(self, request, entity, fields):

    """See base.View._editPost().

    """

    # fill in the account field with the user created from email

    fields['account'] = users.User(fields['email'])

  def getUserSidebar(self):

    """Returns an dictionary with the user sidebar entry.

    """

    params = {}

    params['sidebar_heading'] = "User (self)"

    params['sidebar'] = [

        ('/' + self._params['url_name'] + '/edit', 'Profile'),

        ('/' + self._params['url_name'] + '/roles', 'Roles'),

        ]

    return self.getSidebarLinks(params)

  def getDjangoURLPatterns(self):

    """See base.View.getDjangoURLPatterns().

    """

    patterns = super(View, self).getDjangoURLPatterns()

    patterns += [(r'^' + self._params['url_name'] + '/edit$',

                   'soc.views.models.user.edit_self')]

    page_name = "Unhandled Requests"

    patterns += [(r'^' + self._params['url_name'] + '/roles$',

                   'soc.views.models.request.list_self',

                   {'page_name': page_name}, page_name)]

    return patterns

view = View()

create = view.create

delete = view.delete

edit = view.edit

list = view.list

public = view.public

edit_self = view.editSelf