#!/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 Role profiles.

"""

__authors__ = [

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

    '"Lennard de Rijk" <ljvderijk@gmail.com>',

  ]

from django import http

from django.utils.translation import ugettext_lazy

from soc.logic import dicts

from soc.logic.models import request as request_logic

from soc.logic.models import user as user_logic

from soc.logic.helper import notifications as notifications_helper

from soc.logic.helper import request as request_helper

from soc.views.helper import decorators

from soc.views.helper import redirects

from soc.views.helper import responses

from soc.views.models import base

from soc.views.models import request as request_view

import soc.models.request

import soc.views.helper.lists

import soc.views.helper.responses

import soc.views.helper.widgets

class View(base.View):

  """Views for all entities that inherit from Role.

  All views that only Role entities have are defined in this subclass.

  """

  DEF_INVITE_INSTRUCTION_MSG_FMT = ugettext_lazy(

      'Please use this form to invite someone to become a %(name)s.')

  def __init__(self, params=None):

    """

    Args:

      params: This dictionary should be filled with the parameters

    """

    new_params = {}

    # TODO(ljvderijk) parameterize these patterns

    patterns = params.get('extra_django_patterns')

    if not patterns:

      patterns = []

    if params.get('allow_requests_and_invites'):

      # add patterns concerning requests and invites

      patterns += [(r'^%(url_name)s/(?P<access_type>invite)/%(scope)s$',

          'soc.views.models.%(module_name)s.invite',

          'Create invite for %(name)s'),

          (r'^%(url_name)s/(?P<access_type>accept_invite)/%(scope)s/%(lnp)s$',

          'soc.views.models.%(module_name)s.accept_invite',

          'Accept invite for %(name)s'),

          (r'^%(url_name)s/(?P<access_type>process_request)/%(scope)s/%(lnp)s$',

          'soc.views.models.%(module_name)s.process_request',

          'Process request for %(name)s'),

          (r'^%(url_name)s/(?P<access_type>request)/%(scope)s$',

          'soc.views.models.%(module_name)s.request',

          'Create a Request to become %(name)s')]

    elif params.get('allow_invites'):

      # add patterns concerning only invites

      patterns += [(r'^%(url_name)s/(?P<access_type>invite)/%(scope)s$',

          'soc.views.models.%(module_name)s.invite',

          'Create invite for %(name)s'),

          (r'^%(url_name)s/(?P<access_type>accept_invite)/%(scope)s/%(lnp)s$',

          'soc.views.models.%(module_name)s.accept_invite',

          'Accept invite for %(name)s'),

          (r'^%(url_name)s/(?P<access_type>process_request)/%(scope)s/%(lnp)s$',

          'soc.views.models.%(module_name)s.process_request',

          'Process request for %(name)s')]

    new_params['extra_django_patterns'] = patterns

    new_params['scope_redirect'] = redirects.getInviteRedirect

    params = dicts.merge(params, new_params)

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

  @decorators.merge_params

  @decorators.check_access

  def invite(self, request, access_type,

                   page_name=None, params=None, **kwargs):

    """Creates the page on which an invite can be send out.

    Args:

      request: the standard Django HTTP request object

      access_type : the name of the access type which should be checked

      context: dictionary containing the context for this view

      params: a dict with params for this View

      kwargs: the Key Fields for the specified entity

    """

    # get the context for this webpage

    context = responses.getUniversalContext(request)

    context['page_name'] = page_name

    if request.method == 'POST':

      return self.invitePost(request, context, params, **kwargs)

    else:

      # request.method == 'GET'

      return self.inviteGet(request, context, params, **kwargs)

  def inviteGet(self, request, context, params, **kwargs):

    """Handles the GET request concerning the view that creates an invite

    for attaining a certain Role.

    Args:

      request: the standard Django HTTP request object

      context: dictionary containing the context for this view

      params: a dict with params for this View

      kwargs: the Key Fields for the specified entity

    """

    # set the role to the right name

    fields = {'role': '%(module_name)s' % (params)}

    # get the request view parameters and initialize the create form

    request_params = request_view.view.getParams()

    form = request_params['invite_form'](initial=fields)

    # construct the appropriate response

    return super(View, self)._constructResponse(request, entity=None,

        context=context, form=form, params=params)

  def invitePost(self, request, context, params, **kwargs):

    """Handles the POST request concerning the view that creates an invite

    for attaining a certain Role.

    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

    """

    # get the request view parameters and populate the form using POST data

    request_params = request_view.view.getParams()

    form = request_params['invite_form'](request.POST)

    if not form.is_valid():

      # return the invalid form response

      return self._constructResponse(request, entity=None, context=context,

          form=form, params=params)

    # collect the cleaned data from the valid form

    key_name, form_fields = soc.views.helper.forms.collectCleanedFields(form)

    # get the group entity for which this request is via the scope_path

    group = self._getGroupEntityFromScopePath(params['group_logic'],

         kwargs['scope_path'])

    # get the request scope path

    request_scope_path = self._getRequestScopePathFromGroup(group)

    # create the fields for the new request entity

    request_fields = {'link_id': form_fields['link_id'].link_id,

        'scope': group,

        'scope_path': request_scope_path,

        'role': params['module_name'],

        'role_verbose': params['name'],

        'state': 'group_accepted'}

    # extract the key_name for the new request entity

    key_fields = request_logic.logic.getKeyFieldsFromDict(request_fields)

    key_name = request_logic.logic.getKeyNameForFields(key_fields)

    # create the request entity

    entity = request_logic.logic.updateOrCreateFromKeyName(request_fields, 

        key_name)

    # send out an invite notification

    notifications_helper.sendInviteNotification(entity)

    # TODO(ljvderijk) redirect to a more useful place like the group homepage

    return http.HttpResponseRedirect('/')

  def _getGroupEntityFromScopePath(self, group_logic, scope_path):

    """Returns a group entity by using the given scope_path that's in kwargs.

    Args:

      group_logic: logic for the group which should be retrieved

      kwargs: the Key Fields for the specified entity

    """

    group_key_fields = scope_path.rsplit('/',1)

    if len(group_key_fields) == 1:

      # there is only a link_id

      fields = {'link_id' : group_key_fields[0]}

    else:

      # there is a scope_path and link_id

      fields = {'scope_path' : group_key_fields[0],

                'link_id' : group_key_fields[1]}

    group = group_logic.getForFields(fields, unique=True)

    return group

  def _getRequestScopePathFromGroup(self, group_entity):

    """Returns the scope_path that should be put in a request for a given group.

    Args:

      group_entity: The group entity for which the request scope_path should

                    be returned.

    """

    if group_entity.scope_path:

      request_scope_path = '%s/%s' % [

          group_entity.scope_path, group_entity.link_id]

    else:

      request_scope_path = group_entity.link_id

    return request_scope_path

  @decorators.merge_params

  @decorators.check_access

  def acceptInvite(self, request, access_type,

                   page_name=None, params=None, **kwargs):

    """Creates the page process an invite into a Role.

    Args:

      request: the standard Django HTTP request object

      access_type : the name of the access type which should be checked

      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

    """

     # get the context for this webpage

    context = responses.getUniversalContext(request)

    context['page_name'] = page_name

    if request.method == 'POST':

      return self.acceptInvitePost(request, context, params, **kwargs)

    else:

      # request.method == 'GET'

      return self.acceptInviteGet(request, context, params, **kwargs)

  def acceptInviteGet(self, request, context, params, **kwargs):

    """Handles the GET request concerning the creation of a Role via an

    invite.

    Args:

      request: the standard Django HTTP request object

      context: dictionary containing the context for this view

      params: a dict with params for this View

      kwargs: the Key Fields for the specified entity

    """

    # create the form using the scope_path and link_id from kwargs 

    # as initial value

    fields = {'link_id': kwargs['link_id'],

              'scope_path': kwargs['scope_path']}

    form = params['invited_create_form'](initial=fields)

    # construct the appropriate response

    return super(View, self)._constructResponse(request, entity=None,

        context=context, form=form, params=params)

  def acceptInvitePost(self, request, context, params, **kwargs):

    """Handles the POST request concerning the creation of a Role via an

    invite.

    Args:

      request: the standard Django HTTP request object

      context: dictionary containing the context for this view

      params: a dict with params for this View

      kwargs: the Key Fields for the specified entity

    """

    # populate the form using the POST data

    form = params['invited_create_form'](request.POST)

    if not form.is_valid():

      # return the invalid form response

      return self._constructResponse(request, entity=None, context=context,

          form=form, params=params)

    # collect the cleaned data from the valid form

    key_name, fields = soc.views.helper.forms.collectCleanedFields(form)

    # call the post process method

    self._acceptInvitePost(fields, request, context, params, **kwargs)

    group_logic = params['group_logic']

    group_entity = group_logic.getFromKeyName(fields['scope_path'])

    fields['scope'] = group_entity

    # make sure that this role becomes active once more in case this user

    # has been reinvited

    fields ['state'] = 'active'

    # get the key_name for the new entity

    key_fields =  self._logic.getKeyFieldsFromDict(fields)

    key_name = self._logic.getKeyNameForFields(key_fields)

    # create new Role entity

    entity = self._logic.updateOrCreateFromKeyName(fields, key_name)

    # mark the request as completed

    request_helper.completeRequestForRole(entity, params['module_name'])

    # redirect to the roles overview page

    return http.HttpResponseRedirect('/user/roles')

  def _acceptInvitePost(self, fields, request, context, params, **kwargs):

    """Used to post-process data after the fields have been cleaned.

      Args:

      fields : the cleaned fields from the role form

      request: the standard Django HTTP request object

      context: dictionary containing the context for this view

      params: a dict with params for this View

      kwargs: the Key Fields for the specified entity

    """

    pass

  @decorators.merge_params

  @decorators.check_access

  def request(self, request, access_type,

                   page_name=None, params=None, **kwargs):

    """Handles the GET request concerning the view that creates a request

    for attaining a certain Role.

    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

    """

    # get the context for this webpage

    context = responses.getUniversalContext(request)

    context['page_name'] = page_name

    if request.method == 'POST':

      return self.requestPost(request, context, params, **kwargs)

    else:

      # request.method == 'GET'

      return self.requestGet(request, context, params, **kwargs)

  def requestGet(self, request, context, params, **kwargs):

    """Handles the GET request concerning the creation of a request

    to attain a role.

    Args:

      request: the standard Django HTTP request object

      context: dictionary containing the context for this view

      params: a dict with params for this View

      kwargs: the Key Fields for the specified entity

    """

    # set right fields for the request form

    user_entity = user_logic.logic.getForCurrentAccount()

    fields = {'link_id' : user_entity.link_id,

              'group_id' : kwargs['scope_path']}

    # get the request view parameters and initialize the create form

    request_params = request_view.view.getParams()

    form = request_params['request_form'](initial=fields)

    # construct the appropriate response

    return super(View, self)._constructResponse(request, entity=None,

        context=context, form=form, params=params)

  def requestPost(self, request, context, params, **kwargs):

    """Handles the POST request concerning the creation of a request

    to attain a role.

    Args:

      request: the standard Django HTTP request object

      context: dictionary containing the context for this view

      params: a dict with params for this View

      kwargs: the Key Fields for the specified entity

    """

    # get the request view parameters and populate the form using POST data

    request_params = request_view.view.getParams()

    form = request_params['invite_form'](request.POST)

    if not form.is_valid():

      # return the invalid form response

      return self._constructResponse(request, entity=None, context=context,

          form=form, params=params)

    # get the group entity for which this request is via the scope_path

    group = self._getGroupEntityFromScopePath(params['group_logic'],

         kwargs['scope_path'])

    # get the request scope path

    request_scope_path = self._getRequestScopePathFromGroup(group)

    # defensively set the fields we need for this request and set state to new

    user_entity = user_logic.logic.getForCurrentAccount()

    request_fields = {'link_id' : user_entity.link_id,

        'scope' : group,

        'scope_path' : request_scope_path,

        'role' : params['module_name'],

        'role_verbose' : params['name'],

        'state' : 'new'}

    # extract the key_name for the new request entity

    key_fields = request_logic.logic.getKeyFieldsFromDict(request_fields)

    key_name = request_logic.logic.getKeyNameForFields(key_fields)

    # create the request entity

    entity = request_logic.logic.updateOrCreateFromKeyName(request_fields, key_name)

    # TODO(ljvderijk) send out a message to alert the users able to process this request

    # redirect to roles overview

    return http.HttpResponseRedirect('/user/roles')

  @decorators.merge_params

  @decorators.check_access

  def processRequest(self, request, access_type,

                   page_name=None, params=None, **kwargs):

    """Creates the page upon which a request can be processed.

    Args:

      request: the standard Django HTTP request object

      access_type : the name of the access type which should be checked

      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

    """

    # get the context for this webpage

    context = responses.getUniversalContext(request)

    context['page_name'] = page_name

    # get the request entity using the information from kwargs

    fields = {'link_id': kwargs['link_id'],

        'scope_path': kwargs['scope_path'],

        'role': params['module_name']}

    request_entity = request_logic.logic.getForFields(fields, unique=True)

    get_dict = request.GET

    if 'status' in get_dict.keys():

      if get_dict['status'] in ['group_accepted', 'rejected', 'ignored']:

        # update the request_entity and redirect away from this page

        request_state = get_dict['status']

        request_logic.logic.updateModelProperties(request_entity, {

            'state': get_dict['status']})

        if request_state == 'group_accepted':

          notifications_helper.sendInviteNotification(request_entity)

        # TODO(ljvderijk) redirect to group requests overview

        return http.HttpResponseRedirect('/')

    # put the entity in the context

    context['entity'] = request_entity

    context['module_name'] = params['module_name']

    #display the request processing page using the appropriate template

    template = request_view.view.getParams()['request_processing_template']

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