add "my basket" combo cell type (#6290)

lingo/models.py

@@ -17,10 +17,14 @@
 import eopayment
 from jsonfield import JSONField
 
+from django import template
 from django.conf import settings
 from django.db import models
 from django.utils.translation import ugettext_lazy as _
 
+from combo.data.models import CellBase
+from combo.data.library import register_cell_class
+
 
 SERVICES = [
     (eopayment.DUMMY, _('Dummy (for tests)')),
@@ -64,3 +68,20 @@ class BasketItem(models.Model):
     creation_date = models.DateTimeField(auto_now_add=True)
     cancellation_date = models.DateTimeField(null=True)
     payment_date = models.DateTimeField(null=True)
+
+
+@register_cell_class
+class LingoBasketCell(CellBase):
+
+    class Meta:
+        verbose_name = _('Basket')
+
+    def render(self, context):
+        basket_template = template.loader.get_template('lingo/combo/basket.html')
+        context['items'] = BasketItem.objects.filter(
+                user=context['request'].user, payment_date__isnull=True
+                ).exclude(cancellation_date__isnull=False)
+        if len(context['items']) == 0:
+            return ''
+        context['total'] = sum([x.amount for x in context['items']])
+        return basket_template.render(context)

lingo/templates/lingo/combo/basket.html

@@ -0,0 +1,9 @@
+{% if total %}
+<h3>Basket</h3>
+<ul>
+  {% for item in items %}
+  <li>{{ item.subject }}: {{ item.amount }} €</li>
+  {% endfor %}
+  <li><strong>Total:</strong> {{ total }} €</li>
+</ul>
+{% endif %}