from django.shortcuts import render from django.views.generic import ListView, DetailView, RedirectView from django.views.generic.edit import UpdateView, CreateView, DeleteView, ProcessFormView, FormMixin from django.forms.models import modelform_factory from django.forms import CheckboxSelectMultiple from django.core.urlresolvers import reverse_lazy from django.contrib.auth.forms import AuthenticationForm from django.http import HttpResponseRedirect from django.utils import timezone from django import forms from core.views import CanViewMixin, CanEditMixin, CanEditPropMixin from subscription.models import Subscriber from counter.models import Counter, Customer, Product, Selling, Refilling class GetUserForm(forms.Form): """ The Form class aims at providing a valid user_id field in its cleaned data, in order to pass it to some view, reverse function, or any other use. The Form implements a nice JS widget allowing the user to type a customer account id, or search the database with some nickname, first name, or last name (TODO) """ code = forms.CharField(label="Code", max_length=64, required=False) id = forms.IntegerField(label="ID", required=False) # TODO: add a nice JS widget to search for users def clean(self): cleaned_data = super(GetUserForm, self).clean() user = None if cleaned_data['code'] != "": user = Customer.objects.filter(account_id=cleaned_data['code']).first() elif cleaned_data['id'] is not None: user = Customer.objects.filter(user=cleaned_data['id']).first() if user is None: raise forms.ValidationError("User not found") cleaned_data['user_id'] = user.user.id return cleaned_data class CounterMain(DetailView, ProcessFormView, FormMixin): """ The public (barman) view """ model = Counter template_name = 'counter/counter_main.jinja' pk_url_kwarg = "counter_id" form_class = GetUserForm # Form to enter a client code and get the corresponding user id def get_context_data(self, **kwargs): """ We handle here the login form for the barman Also handle the timeout """ if self.request.method == 'POST': self.object = self.get_object() kwargs = super(CounterMain, self).get_context_data(**kwargs) # TODO: make some checks on the counter type, in order not to make the AuthenticationForm if there is no need to kwargs['login_form'] = AuthenticationForm() kwargs['form'] = self.get_form() kwargs['barmen'] = Counter.get_barmen_list(self.object.id) if 'last_basket' in self.request.session.keys(): kwargs['last_basket'] = self.request.session.pop('last_basket') kwargs['last_customer'] = self.request.session.pop('last_customer') kwargs['last_total'] = self.request.session.pop('last_total') kwargs['new_customer_amount'] = self.request.session.pop('new_customer_amount') return kwargs def form_valid(self, form): """ We handle here the redirection, passing the user id of the asked customer """ self.kwargs['user_id'] = form.cleaned_data['user_id'] return super(CounterMain, self).form_valid(form) def get_success_url(self): return reverse_lazy('counter:click', args=self.args, kwargs=self.kwargs) class CounterClick(DetailView): """ The click view This is a detail view not to have to worry about loading the counter Everything is made by hand in the post method """ model = Counter template_name = 'counter/counter_click.jinja' pk_url_kwarg = "counter_id" def get(self, request, *args, **kwargs): """Simple get view""" self.customer = Customer.objects.filter(user__id=self.kwargs['user_id']).first() if 'basket' not in request.session.keys(): # Init the basket session entry request.session['basket'] = {} request.session['basket_total'] = 0 request.session['not_enough'] = False ret = super(CounterClick, self).get(request, *args, **kwargs) if len(Counter.get_barmen_list(self.object.id)) < 1: # Check that at least one barman is logged in return self.cancel(request) # Otherwise, go to main view return ret def post(self, request, *args, **kwargs): """ Handle the many possibilities of the post request """ self.object = self.get_object() self.customer = Customer.objects.filter(user__id=self.kwargs['user_id']).first() if len(Counter.get_barmen_list(self.object.id)) < 1: # Check that at least one barman is logged in return self.cancel(request) if 'basket' not in request.session.keys(): request.session['basket'] = {} request.session['basket_total'] = 0 request.session['not_enough'] = False if 'add_product' in request.POST['action']: self.add_product(request) elif 'del_product' in request.POST['action']: self.del_product(request) elif 'cancel' in request.POST['action']: return self.cancel(request) elif 'finish' in request.POST['action']: return self.finish(request) context = self.get_context_data(object=self.object) return self.render_to_response(context) def is_barman_price(self, ): if self.customer.user.id in [s.id for s in Counter.get_barmen_list(self.object.id)]: return True else: return False def get_price(self, pid): p = Product.objects.filter(pk=pid).first() if self.is_barman_price(): price = p.special_selling_price else: price = p.selling_price return price def sum_basket(self, request): total = 0 for pid,infos in request.session['basket'].items(): total += infos['price'] * infos['qty'] return total / 100 def add_product(self, request, q = 1): """ Add a product to the basket """ pid = str(request.POST['product_id']) price = self.get_price(pid) total = self.sum_basket(request) if self.customer.amount < (total + float(price)): request.session['not_enough'] = True return if pid in request.session['basket']: request.session['basket'][pid]['qty'] += q else: request.session['basket'][pid] = {'qty': q, 'price': int(price*100)} request.session['not_enough'] = False request.session.modified = True def del_product(self, request): """ Delete a product from the basket """ pid = str(request.POST['product_id']) if pid in request.session['basket']: request.session['basket'][pid]['qty'] -= 1 if request.session['basket'][pid]['qty'] <= 0: del request.session['basket'][pid] else: request.session['basket'][pid] = 0 request.session.modified = True def finish(self, request): """ Finish the click session, and validate the basket """ if self.is_barman_price(): seller = self.customer.user else: seller = Counter.get_random_barman(self.object.id) request.session['last_basket'] = [] for pid,infos in request.session['basket'].items(): # This duplicates code for DB optimization (prevent to load many times the same object) p = Product.objects.filter(pk=pid).first() if self.is_barman_price(): uprice = p.special_selling_price else: uprice = p.selling_price request.session['last_basket'].append("%d x %s" % (infos['qty'], p.name)) s = Selling(product=p, counter=self.object, unit_price=uprice, quantity=infos['qty'], seller=seller, customer=self.customer) s.save() request.session['last_customer'] = self.customer.user.get_display_name() request.session['last_total'] = "%0.2f" % self.sum_basket(request) request.session['new_customer_amount'] = str(self.customer.amount) del request.session['basket'] request.session.modified = True kwargs = { 'counter_id': self.object.id, } return HttpResponseRedirect(reverse_lazy('counter:details', args=self.args, kwargs=kwargs)) def cancel(self, request): """ Cancel the click session """ kwargs = {'counter_id': self.object.id} request.session.pop('basket', None) return HttpResponseRedirect(reverse_lazy('counter:details', args=self.args, kwargs=kwargs)) def get_context_data(self, **kwargs): """ Add customer to the context """ kwargs = super(CounterClick, self).get_context_data(**kwargs) kwargs['customer'] = self.customer kwargs['basket_total'] = self.sum_basket(self.request) return kwargs class CounterLogin(RedirectView): """ Handle the login of a barman Logged barmen are stored in the class-wide variable 'barmen_session', in the Counter model """ permanent = False def post(self, request, *args, **kwargs): """ Register the logged user as barman for this counter """ self.counter_id = kwargs['counter_id'] form = AuthenticationForm(request, data=request.POST) if form.is_valid(): user = Subscriber.objects.filter(username=form.cleaned_data['username']).first() if self.counter_id not in Counter.barmen_session.keys(): Counter.barmen_session[self.counter_id] = {'users': {user.id}, 'time': timezone.now()} else: Counter.barmen_session[self.counter_id]['users'].add(user.id) else: print("Error logging the barman") # TODO handle that nicely return super(CounterLogin, self).post(request, *args, **kwargs) def get_redirect_url(self, *args, **kwargs): return reverse_lazy('counter:details', args=args, kwargs=kwargs) class CounterLogout(RedirectView): permanent = False def post(self, request, *args, **kwargs): """ Unregister the user from the barman """ self.counter_id = kwargs['counter_id'] Counter.barmen_session[str(self.counter_id)]['users'].remove(int(request.POST['user_id'])) return super(CounterLogout, self).post(request, *args, **kwargs) def get_redirect_url(self, *args, **kwargs): return reverse_lazy('counter:details', args=args, kwargs=kwargs) ## Counter admin views class CounterListView(CanViewMixin, ListView): """ A list view for the admins """ model = Counter template_name = 'counter/counter_list.jinja' class CounterEditView(CanEditMixin, UpdateView): """ Edit a counter's main informations (for the counter's admin) """ model = Counter form_class = modelform_factory(Counter, fields=['name', 'club', 'type', 'products'], widgets={'products':CheckboxSelectMultiple}) pk_url_kwarg = "counter_id" template_name = 'counter/counter_edit.jinja' class CounterCreateView(CanEditMixin, CreateView): """ Create a counter (for the admins) """ model = Counter form_class = modelform_factory(Counter, fields=['name', 'club', 'type', 'products'], widgets={'products':CheckboxSelectMultiple}) template_name = 'counter/counter_edit.jinja' class CounterDeleteView(CanEditMixin, DeleteView): """ Delete a counter (for the admins) """ model = Counter pk_url_kwarg = "counter_id" template_name = 'core/delete_confirm.jinja' success_url = reverse_lazy('counter:admin_list')