support: Update billing modality for remote server current plan.

analytics/views/support.py

@@ -389,6 +389,9 @@ def remote_servers_support(
     discount: Optional[Decimal] = REQ(default=None, converter=to_decimal),
     sponsorship_pending: Optional[bool] = REQ(default=None, json_validator=check_bool),
     approve_sponsorship: bool = REQ(default=False, json_validator=check_bool),
+    billing_modality: Optional[str] = REQ(
+        default=None, str_validator=check_string_in(VALID_BILLING_MODALITY_VALUES)
+    ),
 ) -> HttpResponse:
     context: Dict[str, Any] = {}
 
@@ -424,6 +427,11 @@ def remote_servers_support(
                 support_type=SupportType.attach_discount,
                 discount=discount,
             )
+        elif billing_modality is not None:
+            support_view_request = SupportViewRequest(
+                support_type=SupportType.update_billing_modality,
+                billing_modality=billing_modality,
+            )
         if support_view_request is not None:
             billing_session = RemoteServerBillingSession(
                 support_staff=acting_user, remote_server=remote_server

templates/analytics/remote_server_support.html

@@ -107,6 +107,17 @@
                 <b>End date</b>: {{ plan_data[remote_server.id].current_plan.end_date.strftime('%d %B %Y') }}<br />
                 {% endif %}
             </div>
+
+            <form method="POST" class="remote-server-form">
+                <b>Billing collection method</b><br />
+                {{ csrf_input }}
+                <input type="hidden" name="remote_server_id" value="{{ remote_server.id }}" />
+                <select name="billing_modality" class="billing-modality-select" required>
+                    <option value="charge_automatically" {% if plan_data[remote_server.id].current_plan.charge_automatically %}selected{% endif %}>Charge automatically</option>
+                    <option value="send_invoice" {% if not plan_data[remote_server.id].current_plan.charge_automatically %}selected{% endif %}>Pay by invoice</option>
+                </select>
+                <button type="submit" class="btn btn-default support-submit-button">Update</button>
+            </form>
             {% endif %}
         </div>
         {% endfor %}