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# Patchwork - automated patch tracking system
# Copyright (C) 2008 Jeremy Kerr <jk@ozlabs.org>
#
# This file is part of the Patchwork package.
#
# Patchwork is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# Patchwork is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Patchwork; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA


from django.contrib.auth.decorators import login_required
from patchwork.requestcontext import PatchworkRequestContext
from django.shortcuts import render_to_response, get_object_or_404
from django.contrib import auth
from django.contrib.sites.models import Site
from django.http import HttpResponseRedirect
from patchwork.models import Project, Bundle, Person, EmailConfirmation, \
         State, EmailOptout
from patchwork.forms import UserProfileForm, UserPersonLinkForm, \
         RegistrationForm
from patchwork.filters import DelegateFilter
from patchwork.views import generic_list
from django.template.loader import render_to_string
from django.conf import settings
from django.core.mail import send_mail
import django.core.urlresolvers

def register(request):
    context = PatchworkRequestContext(request)
    if request.method == 'POST':
        form = RegistrationForm(request.POST)
        if form.is_valid():
            data = form.cleaned_data
            # create inactive user
            user = auth.models.User.objects.create_user(data['username'],
                                                        data['email'],
                                                        data['password'])
            user.is_active = False;
            user.first_name = data.get('first_name', '')
            user.last_name = data.get('last_name', '')
            user.save()

            # create confirmation
            conf = EmailConfirmation(type = 'registration', user = user,
                                     email = user.email)
            conf.save()

            # send email
            mail_ctx = {'site': Site.objects.get_current(),
                        'confirmation': conf}

            subject = render_to_string('patchwork/activation_email_subject.txt',
                                mail_ctx).replace('\n', ' ').strip()
            
            message = render_to_string('patchwork/activation_email.txt',
                                    mail_ctx)
            
            send_mail(subject, message, settings.DEFAULT_FROM_EMAIL,
                            [conf.email])

            # setting 'confirmation' in the template indicates success
            context['confirmation'] = conf

    else:
        form = RegistrationForm()
    
    return render_to_response('patchwork/registration_form.html',
                              { 'form': form },
                              context_instance=context)

def register_confirm(request, conf):
    conf.user.is_active = True
    conf.user.save()
    conf.deactivate()
    try:
        person = Person.objects.get(email__iexact = conf.user.email)
    except Person.DoesNotExist:
        person = Person(email = conf.user.email,
                name = conf.user.profile.name())
    person.user = conf.user
    person.save()

    return render_to_response('patchwork/registration-confirm.html')

@login_required
def profile(request):
    context = PatchworkRequestContext(request)

    if request.method == 'POST':
        form = UserProfileForm(instance = request.user.profile,
                data = request.POST)
        if form.is_valid():
            form.save()
    else:
        form = UserProfileForm(instance = request.user.profile)

    context.project = request.user.profile.primary_project
    context['bundles'] = Bundle.objects.filter(owner = request.user)
    context['profileform'] = form

    optout_query = '%s.%s IN (SELECT %s FROM %s)' % (
                        Person._meta.db_table,
                        Person._meta.get_field('email').column,
                        EmailOptout._meta.get_field('email').column,
                        EmailOptout._meta.db_table)
    people = Person.objects.filter(user = request.user) \
             .extra(select = {'is_optout': optout_query})
    context['linked_emails'] = people
    context['linkform'] = UserPersonLinkForm()

    return render_to_response('patchwork/profile.html', context)

@login_required
def link(request):
    context = PatchworkRequestContext(request)

    if request.method == 'POST':
        form = UserPersonLinkForm(request.POST)
        if form.is_valid():
            conf = EmailConfirmation(type = 'userperson',
                    user = request.user,
                    email = form.cleaned_data['email'])
            conf.save()
            context['confirmation'] = conf

            try:
                send_mail('Patchwork email address confirmation',
                            render_to_string('patchwork/user-link.mail',
                                context),
                            settings.DEFAULT_FROM_EMAIL,
                            [form.cleaned_data['email']])
            except Exception:
                context['confirmation'] = None
                context['error'] = 'An error occurred during confirmation. ' + \
                                   'Please try again later'
    else:
        form = UserPersonLinkForm()
    context['linkform'] = form

    return render_to_response('patchwork/user-link.html', context)

@login_required
def link_confirm(request, conf):
    context = PatchworkRequestContext(request)

    try:
        person = Person.objects.get(email__iexact = conf.email)
    except Person.DoesNotExist:
        person = Person(email = conf.email)

    person.link_to_user(conf.user)
    person.save()
    conf.deactivate()

    context['person'] = person

    return render_to_response('patchwork/user-link-confirm.html', context)

@login_required
def unlink(request, person_id):
    person = get_object_or_404(Person, id = person_id)

    if request.method == 'POST':
        if person.email != request.user.email:
            person.user = None
            person.save()

    url = django.core.urlresolvers.reverse('patchwork.views.user.profile')
    return HttpResponseRedirect(url)


@login_required
def todo_lists(request):
    todo_lists = []

    for project in Project.objects.all():
        patches = request.user.profile.todo_patches(project = project)
        if not patches.count():
            continue

        todo_lists.append({'project': project, 'n_patches': patches.count()})

    if len(todo_lists) == 1:
        return todo_list(request, todo_lists[0]['project'].linkname)

    context = PatchworkRequestContext(request)
    context['todo_lists'] = todo_lists
    context.project = request.user.profile.primary_project
    return render_to_response('patchwork/todo-lists.html', context)

@login_required
def todo_list(request, project_id):
    project = get_object_or_404(Project, linkname = project_id)
    patches = request.user.profile.todo_patches(project = project)
    filter_settings = [(DelegateFilter,
            {'delegate': request.user})]

    context = generic_list(request, project,
            'patchwork.views.user.todo_list',
            view_args = {'project_id': project.linkname},
            filter_settings = filter_settings,
            patches = patches)

    context['action_required_states'] = \
        State.objects.filter(action_required = True).all()
    return render_to_response('patchwork/todo-list.html', context)