from django.contrib import admin, messages from django.core.urlresolvers import reverse from django.utils.safestring import mark_safe from django.utils.translation import ugettext_lazy as _ from django.utils.translation import ungettext from django.shortcuts import render from .forms import (BillSelectedOptionsForm, BillSelectConfirmationForm, BillSelectRelatedForm) class BillSelectedOrders(object): """ Form wizard for billing orders admin action """ short_description = _("Bill selected orders") template = 'admin/orders/order/bill_selected_options.html' __name__ = 'bill_selected_orders' def __call__(self, modeladmin, request, queryset): """ make this monster behave like a function """ self.modeladmin = modeladmin self.queryset = queryset opts = modeladmin.model._meta app_label = opts.app_label self.context = { 'opts': opts, 'app_label': app_label, 'queryset': queryset, 'action_checkbox_name': admin.helpers.ACTION_CHECKBOX_NAME, } return self.set_options(request) def set_options(self, request): form = BillSelectedOptionsForm() if request.POST.get('step'): form = BillSelectedOptionsForm(request.POST) if form.is_valid(): self.options = dict( billing_point=form.cleaned_data['billing_point'], fixed_point=form.cleaned_data['fixed_point'], is_proforma=form.cleaned_data['is_proforma'], create_new_open=form.cleaned_data['create_new_open'], ) if int(request.POST.get('step')) != 3: return self.select_related(request) else: return self.confirmation(request) self.context.update({ 'title': _("Options for billing selected orders, step 1 / 3"), 'step': 1, 'form': form, }) return render(request, self.template, self.context) def select_related(self, request): # TODO use changelist ? related = self.queryset.get_related().select_related('account__user', 'service') if not related: return self.confirmation(request) self.options['related_queryset'] = related form = BillSelectRelatedForm(initial=self.options) if int(request.POST.get('step')) >= 2: form = BillSelectRelatedForm(request.POST, initial=self.options) if form.is_valid(): select_related = form.cleaned_data['selected_related'] self.queryset = self.queryset | select_related return self.confirmation(request) self.context.update({ 'title': _("Select related order for billing, step 2 / 3"), 'step': 2, 'form': form, }) return render(request, self.template, self.context) def confirmation(self, request): form = BillSelectConfirmationForm(initial=self.options) if int(request.POST.get('step')) >= 3: bills = self.queryset.bill(commit=True, **self.options) if not bills: msg = _("Selected orders do not have pending billing") self.modeladmin.message_user(request, msg, messages.WARNING) else: ids = ','.join([str(bill.id) for bill in bills]) url = reverse('admin:bills_bill_changelist') url += '?id__in=%s' % ids num = len(bills) msg = ungettext( 'One bill has been created.', '{num} bills have been created.', num).format(url=url, num=num) msg = mark_safe(msg) self.modeladmin.message_user(request, msg, messages.INFO) return bills = self.queryset.bill(commit=False, **self.options) self.context.update({ 'title': _("Confirmation for billing selected orders"), 'step': 3, 'form': form, 'bills': bills, }) return render(request, self.template, self.context)