lingo: make it possible to mark a basket item as not cancellable (#11144)

combo/apps/lingo/migrations/0019_auto_20160531_1336.py

@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('lingo', '0018_auto_20160527_0638'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='basketitem',
+            name='user_cancellable',
+            field=models.BooleanField(default=True),
+        ),
+    ]

combo/apps/lingo/models.py

@@ -191,6 +191,7 @@ class BasketItem(models.Model):
     details = models.TextField(verbose_name=_('Details'), blank=True)
     amount = models.DecimalField(verbose_name=_('Amount'),
             decimal_places=2, max_digits=8)
+    user_cancellable = models.BooleanField(default=True)
     creation_date = models.DateTimeField(auto_now_add=True)
     cancellation_date = models.DateTimeField(null=True)
     payment_date = models.DateTimeField(null=True)

combo/apps/lingo/templates/lingo/combo/basket.html

@@ -8,7 +8,10 @@
   {% for item in items %}
   <li><label><input type="checkbox" name="item" value="{{ item.id }}" checked/>
           <a href="{{ item.source_url }}">{{ item.subject }}</a>: {{ item.amount }} €</label>
-          <a rel="popup" href="{% url 'lingo-cancel-item' pk=item.id %}">({% trans 'remove' %}</a>)</li>
+          {% if item.user_cancellable %}
+          <a rel="popup" href="{% url 'lingo-cancel-item' pk=item.id %}">({% trans 'remove' %}</a>)
+          {% endif %}
+  </li>
   {% endfor %}
   <li><strong>{% trans "Total:" %}</strong> {{ total }} €</li>
 </ul>

combo/apps/lingo/views.py

@@ -130,6 +130,9 @@ class AddBasketItemApiView(View):
             # database...
             item.regie = Regie.objects.all()[0]
 
+        if request.GET.get('cancellable') == 'no':
+            item.user_cancellable = False
+
         item.subject = request_body.get('display_name')
         item.source_url = request_body.get('url')
 
@@ -393,6 +396,9 @@ class CancelItemView(DetailView):
                 cancellation_date__isnull=True)
 
     def post(self, request, *args, **kwargs):
+        if not self.get_object().user_cancellable:
+            messages.error(request, _('This item cannot be removed'))
+            return HttpResponseRedirect(get_basket_url())
         try:
             self.get_object().notify_cancellation()
         except requests.exceptions.HTTPError: