Add last statement update support.

K-Psul
- Add handler for checkout data (balance update)
- New statements are sent through ws, and display live on K-Psul.

kfet/static/kfet/js/kpsul.js

@@ -316,6 +316,8 @@ class CheckoutManager {
                 </a>
             `,
         };
+
+        OperationWebSocket.add_handler(data => this.update_data(data));
     }
 
     update(id) {
@@ -344,6 +346,14 @@ class CheckoutManager {
 
     }
 
+    update_data(ws_data) {
+        let data = ws_data["checkouts"].find(o => o.id === this.checkout.id);
+        if (!data)
+            return;
+        this.checkout.update(data);
+        this._update_on_success(data);
+    }
+
     is_empty() { return this.checkout.is_empty(); }
 
     display() {

kfet/views.py

@@ -765,7 +765,24 @@ class CheckoutStatementCreate(SuccessMessageMixin, CreateView):
             form.instance.balance_new = getAmountBalance(form.cleaned_data)
         form.instance.checkout_id = self.kwargs['pk_checkout']
         form.instance.by = self.request.user.profile.account_kfet
-        return super(CheckoutStatementCreate, self).form_valid(form)
+        res = super(CheckoutStatementCreate, self).form_valid(form)
+
+        ws_data = {
+            'id': self.object.id,
+            'at': self.object.at,
+            'balance_new': self.object.balance_new,
+            'balance_old': self.object.balance_old,
+            'by': str(self.object.by),
+        }
+        consumers.KPsul.group_send('kfet.kpsul', {
+            'checkouts': [{
+                'id': self.object.checkout.id,
+                'laststatement': ws_data,
+            }],
+        })
+
+        return res
+
 
 class CheckoutStatementUpdate(SuccessMessageMixin, UpdateView):
     model = CheckoutStatement