Allow sending emails to be disabled

Platform admins can now disable sending of emails for a service. If
sending emails is disabled, this will also hide the option to change the
Email reply to address.

app/main/views/service_settings.py

@@ -239,6 +239,14 @@ def service_switch_can_send_international_sms(service_id):
     return redirect(url_for('.service_settings', service_id=service_id))
 
 
+@main.route("/services/<service_id>/service-settings/can-send-email")
+@login_required
+@user_has_permissions(admin_override=True)
+def service_switch_can_send_email(service_id):
+    switch_service_permissions(service_id, 'email')
+    return redirect(url_for('.service_settings', service_id=service_id))
+
+
 @main.route("/services/<service_id>/service-settings/archive", methods=['GET', 'POST'])
 @login_required
 @user_has_permissions('manage_settings', admin_override=True)
@@ -276,6 +284,15 @@ def resume_service(service_id):
         return service_settings(service_id)
 
 
+@main.route("/services/<service_id>/service-settings/set-email", methods=['GET'])
+@login_required
+@user_has_permissions('manage_settings', admin_override=True)
+def service_set_email(service_id):
+    return render_template(
+        'views/service-settings/set-email.html',
+    )
+
+
 @main.route("/services/<service_id>/service-settings/set-reply-to-email", methods=['GET', 'POST'])
 @login_required
 @user_has_permissions('manage_settings', admin_override=True)

app/templates/views/service-settings.html

@@ -26,14 +26,24 @@
         {% endcall %}
 
         {% call row() %}
-          {{ text_field('Email reply to address') }}
-          {{ text_field(
-            current_service.reply_to_email_address,
-            status='' if current_service.reply_to_email_address else 'default'
-          ) }}
-          {{ edit_field('Change', url_for('.service_set_reply_to_email', service_id=current_service.id)) }}
+          {{ text_field('Send emails') }}
+          {{ boolean_field('email' in current_service.permissions) }}
+          {{ edit_field('Change', url_for('.service_set_email', service_id=current_service.id)) }}
         {% endcall %}
 
+        {% if 'email' in current_service.permissions %}
+
+          {% call row() %}
+            {{ text_field('Email reply to address') }}
+            {{ text_field(
+              current_service.reply_to_email_address,
+              status='' if current_service.reply_to_email_address else 'default'
+            ) }}
+            {{ edit_field('Change', url_for('.service_set_reply_to_email', service_id=current_service.id)) }}
+          {% endcall %}
+
+        {% endif %}
+
         {% call row() %}
           {{ text_field('Text message sender') }}
           {{ text_field(current_service.sms_sender) }}
@@ -156,6 +166,11 @@
             {{ 'Take service out of research mode' if current_service.research_mode else 'Put into research mode' }}
           </a>
         </li>
+        <li class="bottom-gutter">
+          <a href="{{ url_for('.service_switch_can_send_email', service_id=current_service.id) }}" class="button">
+            {{ 'Stop sending emails' if 'email' in current_service.permissions else 'Allow to send emails' }}
+          </a>
+        </li>
         <li class="bottom-gutter">
           <a href="{{ url_for('.service_switch_can_send_letters', service_id=current_service.id) }}" class="button">
             {{ 'Stop sending letters' if 'letter' in current_service.permissions else 'Allow to send letters' }}

app/templates/views/service-settings/set-email.html

@@ -0,0 +1,38 @@
+{% extends "withnav_template.html" %}
+{% from "components/textbox.html" import textbox %}
+{% from "components/page-footer.html" import page_footer %}
+
+{% block service_page_title %}
+  Emails
+{% endblock %}
+
+{% block maincolumn_content %}
+
+  <div class="grid-row">
+    <div class="column-five-sixths">
+      <h1 class="heading-large">Emails</h1>
+      {% if 'email' in current_service.permissions %}
+        <p>
+          Your service can send emails.
+        </p>
+        <p>
+          If you want to turn it off,
+          <a href="{{ url_for('.support') }}">get in touch with the GOV.UK Notify team</a>.
+        </p>
+      {% else %}
+        <p>
+          Sending emails is an invitation&#8209;only feature.
+        </p>
+        <p>
+          If you want to try it out,
+          <a href="{{ url_for('.support') }}">get in touch with the GOV.UK Notify team</a>.
+        </p>
+      {% endif %}
+      {{ page_footer(
+        back_link=url_for('.service_settings', service_id=current_service.id),
+        back_link_text='Back to settings'
+      ) }}
+    </div>
+  </div>
+
+{% endblock %}