combo/combo/apps/lingo/manager_views.py

# lingo - basket and payment system
# Copyright (C) 2015  Entr'ouvert
#
# This program is free software: you can redistribute it and/or modify it
# under the terms of the GNU Affero General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

import csv
import datetime
from dateutil import parser as date_parser

from django.core.urlresolvers import reverse
from django.core.urlresolvers import reverse_lazy
from django.db.models import Q
from django.db.models.expressions import RawSQL
from django.utils import six
from django.utils.timezone import make_aware, now
from django.views.generic import CreateView, UpdateView, ListView, DeleteView, View
from django.http import HttpResponse
from django.http import HttpResponseRedirect
from django.shortcuts import get_object_or_404
from django.template.response import TemplateResponse

import eopayment

from .forms import RegieForm
from .forms import TransactionExportForm
from .models import BasketItem, PaymentBackend, Regie, Transaction


class RegieListView(ListView):
    model = Regie


class RegieCreateView(CreateView):
    model = Regie
    fields = ['label', 'slug', 'description', 'payment_backend']
    success_url = reverse_lazy('lingo-manager-regie-list')


class RegieUpdateView(UpdateView):
    model = Regie
    form_class = RegieForm
    success_url = reverse_lazy('lingo-manager-regie-list')


class RegieDeleteView(DeleteView):
    model = Regie
    success_url = reverse_lazy('lingo-manager-regie-list')


class PaymentBackendListView(ListView):
    model = PaymentBackend


class PaymentBackendCreateView(CreateView):
    model = PaymentBackend
    fields = '__all__'
    success_url = reverse_lazy('lingo-manager-paymentbackend-list')


class PaymentBackendUpdateView(UpdateView):
    model = PaymentBackend
    fields = '__all__'
    success_url = reverse_lazy('lingo-manager-paymentbackend-list')


class PaymentBackendDeleteView(DeleteView):
    model = PaymentBackend
    success_url = reverse_lazy('lingo-manager-paymentbackend-list')


class TransactionListView(ListView):
    model = Transaction
    paginate_by = 10

    def get_context_data(self, **kwargs):
        context = super(TransactionListView, self).get_context_data(**kwargs)
        context['query'] = self.request.GET.get('q') or ''
        return context

    def get_queryset(self):
        qs = Transaction.objects.filter(
                status__in=(eopayment.PAID, eopayment.ACCEPTED)).order_by('-start_date')
        query = self.request.GET.get('q')
        if query:
            try:
                date = date_parser.parse(query, dayfirst=True)
            except:
                qs = qs.filter(
                        Q(order_id=query) |
                        Q(bank_transaction_id=query) |
                        Q(items__subject__icontains=query)
                        )
            else:
                date = make_aware(date)
                qs = qs.filter(start_date__gte=date, start_date__lt=date + datetime.timedelta(days=1))
        return qs


class BasketItemErrorListView(ListView):
    model = BasketItem
    template_name = 'lingo/basketitem_error_list.html'
    paginate_by = 10

    def get_context_data(self, **kwargs):
        context = super(BasketItemErrorListView, self).get_context_data(**kwargs)
        context['query'] = self.request.GET.get('q') or ''
        return context

    def get_queryset(self):
        raw = (
            'SELECT %s FROM lingo_transaction '
            'INNER JOIN lingo_transaction_items '
            'ON "lingo_transaction"."id" = "lingo_transaction_items"."transaction_id" '
            'AND "lingo_transaction_items"."basketitem_id"="lingo_basketitem"."id" '
            'ORDER BY start_date DESC LIMIT 1')
        queryset = (
            BasketItem.objects
            .annotate(bank_transaction_id=RawSQL(raw % 'bank_transaction_id', []))
            .annotate(transaction_status=RawSQL(raw % 'status', []))
            .filter(regie__webservice_url='')
            .order_by())

        terms = self.request.GET.get('q')
        if terms:
            queryset = queryset.filter(subject__icontains=terms)

        queryset1 = (
            queryset
            .filter(
                notification_date__isnull=True,
                cancellation_date__isnull=True,
                payment_date__lt=now() - datetime.timedelta(minutes=300)))
        queryset2 = queryset.filter(transaction_status=eopayment.ERROR)
        return queryset1.union(queryset2).order_by('-creation_date')


class BasketItemMarkAsNotifiedView(View):
    def get(self, request, *args, **kwargs):
        item = get_object_or_404(
            BasketItem.objects.exclude(source_url=''),
            pk=kwargs['item_id'],
            regie__webservice_url='',
            notification_date__isnull=True,
            cancellation_date__isnull=True,
            payment_date__lt=now() - datetime.timedelta(minutes=300))
        item.notify_payment(notify_origin=False)

        return HttpResponseRedirect(reverse('lingo-manager-payment-error-list'))


def download_transactions_csv(request):
    if request.method == 'POST':
        form = TransactionExportForm(data=request.POST)
        if form.is_valid():
            response = HttpResponse(content_type='text/csv')
            response['Content-Disposition'] = 'attachment; filename="transactions.csv"'
            writer = csv.writer(response)
            transactions = (
                Transaction.objects
                .filter(
                    status__in=(eopayment.PAID, eopayment.ACCEPTED),
                    start_date__gte=form.cleaned_data['start_date'],
                    start_date__lte=form.cleaned_data['end_date'],
                ).order_by('-start_date'))
            for transaction in transactions:
                row = [transaction.order_id,
                       transaction.bank_transaction_id,
                       transaction.start_date.strftime('%Y-%m-%d %H:%M:%S'),
                       transaction.get_user_name(),
                       str(transaction.amount)]
                for item in transaction.items.all():
                    row.extend([item.subject, str(item.amount)])
                if six.PY3:
                    writer.writerow([x for x in row])
                else:
                    writer.writerow([unicode(x).encode('utf-8') for x in row])
            return response
    else:
        form = TransactionExportForm()

    return TemplateResponse(request, 'lingo/transaction_export.html', {'form': form})