Add the basket handling in the click view of the counter

Now there is still to handle the validation by generating the appropriate invoice(s)

counter/templates/counter/counter_click.jinja

 {% extends "core/base.jinja" %}
 
-{% macro barman_logout_link(user) %}
-<form method="post" action="{{ url('counter:logout', counter_id=counter.id) }}" class="inline">
+{% macro add_product(id, content) %}
+<form method="post" action="{{ url('counter:click', counter_id=counter.id, user_id=customer.user.id) }}" class="inline" style="display:inline">
     {% csrf_token %}
-    <input type="hidden" name="user_id" value="{{ user.id }}">
-    <button type="submit" name="submit_param" value="submit_value" class="link-button">{{ user.get_display_name() }}</button>
+    <input type="hidden" name="action" value="add_product">
+    <button type="submit" name="product_id" value="{{ id }}"> {{ content }} </button>
+</form>
+{% endmacro %}
+
+{% macro del_product(id, content) %}
+<form method="post" action="{{ url('counter:click', counter_id=counter.id, user_id=customer.user.id) }}" class="inline" style="display:inline">
+    {% csrf_token %}
+    <input type="hidden" name="action" value="del_product">
+    <button type="submit" name="product_id" value="{{ id }}"> {{ content }} </button>
 </form>
 {% endmacro %}
 
@@ -12,15 +20,30 @@
     <h3>Counter</h3>
     <h4>{{ counter }}</h4>
     <p><strong>Club: </strong> {{ counter.club }}</p>
-    <p><strong>Products: </strong> {{ counter.products.all() }}</p>
 
     <div>
-        Customer: {{ customer }}
+        <p>Customer: {{ customer }}</p>
+        <p>Basket: </p>
+        <ul>
+        {% for id,qte in request.session['basket'].items() %}
+            <li>{{ del_product(id, '-') }} {{ qte }} {{ add_product(id, '+') }} {{ counter.products.filter(id=id).first().name }}</li>
+        {% endfor %}
+        </ul>
+        <form method="post" action="{{ url('counter:click', counter_id=counter.id, user_id=customer.user.id) }}">
+            {% csrf_token %}
+            <input type="hidden" name="action" value="finish">
+            <input type="submit" value="Finish" />
+        </form>
         <form method="post" action="{{ url('counter:click', counter_id=counter.id, user_id=customer.user.id) }}">
             {% csrf_token %}
-            {{ form.as_p() }}
-        <input type="submit" value="CLICK" />
+            <input type="hidden" name="action" value="cancel">
+            <input type="submit" value="Cancel" />
         </form>
+        <p><strong>Products: </strong>
+        {% for p in counter.products.all() %}
+            {{ add_product(p.id, p.name) }}
+        {% endfor %}
+        </p>
     </div>
 
 {% endblock %}

counter/views.py

@@ -5,6 +5,7 @@ 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.conf import settings
 from django import forms
@@ -100,44 +101,78 @@ class BasketForm(forms.Form):
             total += (q or 0)*p.selling_price
         print(total)
 
-class CounterClick(DetailView, ProcessFormView, FormMixin):
+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"
-    form_class = BasketForm
-    prefix = "prod"
 
     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():
+            request.session['basket'] = {}
         return super(CounterClick, self).get(request, *args, **kwargs)
 
     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()
-        return super(CounterClick, self).post(request, *args, **kwargs)
-
-    def form_valid(self, form):
-        return super(CounterClick, self).form_valid(form)
-
-    def get_form_kwargs(self):
-        kwargs = super(CounterClick, self).get_form_kwargs()
-        kwargs['initial'].update({'counter': self.object, 'customer': self.customer})
-        return kwargs
+        if 'basket' not in request.session.keys():
+            request.session['basket'] = {}
+
+        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 add_product(self, request):
+        """ Add a product to the basket """
+        if str(request.POST['product_id']) in request.session['basket']:
+            request.session['basket'][str(request.POST['product_id'])] += 1
+        else:
+            request.session['basket'][str(request.POST['product_id'])] = 1
+        request.session.modified = True
+
+    def del_product(self, request):
+        """ Delete a product from the basket """
+        if str(request.POST['product_id']) in request.session['basket']:
+            request.session['basket'][str(request.POST['product_id'])] -= 1
+            if request.session['basket'][str(request.POST['product_id'])] <= 0:
+                del request.session['basket'][str(request.POST['product_id'])]
+        else:
+            request.session['basket'][str(request.POST['product_id'])] = 0
+        request.session.modified = True
+
+    def finish(self, request):
+        """ Finish the click session, and validate the basket """
+        # TODO: handle the basket
+        kwargs = {'counter_id': self.object.id}
+        del request.session['basket']
+        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}
+        del request.session['basket']
+        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['form'] = self.get_form()
         return kwargs
 
-    def get_success_url(self):
-        return reverse_lazy('counter:click', args=self.args, kwargs=self.kwargs)
-
 class CounterLogin(RedirectView):
     """
     Handle the login of a barman

sith/settings.py

@@ -57,6 +57,8 @@ MIDDLEWARE_CLASSES = (
     'core.middleware.AuthenticationMiddleware',
 )
 
+SESSION_SERIALIZER = 'django.contrib.sessions.serializers.PickleSerializer'
+
 ROOT_URLCONF = 'sith.urls'
 
 TEMPLATES = [