Stop users from editing/adding templates without the correct permission

If sending SMS is disabled for a service, it should not be possible to
add or modify SMS templates. If a user tries to do this, they should see
a different page with a link to go back. The same thing should happen
with email templates.

app/main/views/send.py

@@ -93,6 +93,16 @@ def send_messages(service_id, template_id):
 
     db_template = service_api_client.get_service_template(service_id, template_id)['data']
 
+    if (db_template['template_type'] in ['email', 'sms']) \
+            and (db_template['template_type'] not in current_service['permissions']):
+        return redirect(url_for(
+            '.action_blocked',
+            service_id=service_id,
+            notification_type=db_template['template_type'],
+            return_to='view_template',
+            template_id=template_id
+        ))
+
     template = get_template(
         db_template,
         current_service,
@@ -163,6 +173,18 @@ def send_test(service_id, template_id):
     session['recipient'] = None
     session['placeholders'] = {}
     session['send_test_letter_page_count'] = None
+
+    db_template = service_api_client.get_service_template(service_id, template_id)['data']
+
+    if (db_template['template_type'] in ['email', 'sms']) \
+            and (db_template['template_type'] not in current_service['permissions']):
+        return redirect(url_for(
+            '.action_blocked',
+            service_id=service_id,
+            notification_type=db_template['template_type'],
+            return_to='view_template',
+            template_id=template_id))
+
     return redirect(url_for(
         {
             'main.send_test': '.send_test_step',

app/main/views/templates.py

@@ -232,15 +232,42 @@ def add_template_by_type(service_id):
                 template_id=blank_letter['data']['id'],
             ))
 
-        return redirect(url_for(
-            '.add_service_template',
-            service_id=service_id,
-            template_type=form.template_type.data,
-        ))
+        if form.template_type.data in current_service['permissions']:
+            return redirect(url_for(
+                '.add_service_template',
+                service_id=service_id,
+                template_type=form.template_type.data,
+            ))
+        else:
+            return redirect(url_for(
+                '.action_blocked',
+                service_id=service_id,
+                notification_type=form.template_type.data,
+                return_to='add_new_template',
+                template_id='0'
+            ))
 
     return render_template('views/templates/add.html', form=form)
 
 
+@main.route("/services/<service_id>/templates/action-blocked/<notification_type>/<return_to>/<template_id>")
+@login_required
+@user_has_permissions('manage_templates', admin_override=True)
+def action_blocked(service_id, notification_type, return_to, template_id):
+    if notification_type == 'sms':
+        notification_type = 'text messages'
+    elif notification_type == 'email':
+        notification_type = 'emails'
+
+    return render_template(
+        'views/templates/action_blocked.html',
+        service_id=service_id,
+        notification_type=notification_type,
+        return_to=return_to,
+        template_id=template_id
+    )
+
+
 @main.route("/services/<service_id>/templates/add-<template_type>", methods=['GET', 'POST'])
 @login_required
 @user_has_permissions('manage_templates', admin_override=True)
@@ -277,13 +304,21 @@ def add_service_template(service_id, template_type):
             return redirect(
                 url_for('.view_template', service_id=service_id, template_id=new_template['data']['id'])
             )
-
-    return render_template(
-        'views/edit-{}-template.html'.format(template_type),
-        form=form,
-        template_type=template_type,
-        heading_action='Add'
-    )
+    if (template_type in ['email', 'sms']) and (template_type not in current_service['permissions']):
+        return redirect(url_for(
+            '.action_blocked',
+            service_id=service_id,
+            notification_type=template_type,
+            return_to='templates',
+            template_id='0'
+        ))
+    else:
+        return render_template(
+            'views/edit-{}-template.html'.format(template_type),
+            form=form,
+            template_type=template_type,
+            heading_action='Add',
+        )
 
 
 def abort_403_if_not_admin_user():
@@ -354,13 +389,26 @@ def edit_service_template(service_id, template_id):
                 service_id=service_id,
                 template_id=template_id
             ))
-    return render_template(
-        'views/edit-{}-template.html'.format(template['template_type']),
-        form=form,
-        template_id=template_id,
-        template_type=template['template_type'],
-        heading_action='Edit'
-    )
+
+    db_template = service_api_client.get_service_template(service_id, template_id)['data']
+
+    if (db_template['template_type'] in ['email', 'sms']) \
+            and (db_template['template_type'] not in current_service['permissions']):
+        return redirect(url_for(
+            '.action_blocked',
+            service_id=service_id,
+            notification_type=db_template['template_type'],
+            return_to='view_template',
+            template_id=template_id
+        ))
+    else:
+        return render_template(
+            'views/edit-{}-template.html'.format(template['template_type']),
+            form=form,
+            template_id=template_id,
+            template_type=template['template_type'],
+            heading_action='Edit'
+        )
 
 
 @main.route("/services/<service_id>/templates/<template_id>/delete", methods=['GET', 'POST'])

app/templates/views/templates/action_blocked.html

@@ -0,0 +1,47 @@
+{% 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">{{ notification_type.capitalize() }}</h1>
+      <p>
+        Sending {{ notification_type }} 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>
+
+      {% set
+        back_link_dict = {
+          'add_new_template': {
+            'url' : '.add_template_by_type', 'text': 'Back to add new template'
+          },
+          'templates': {
+            'url' : '.choose_template', 'text' : 'Back to templates'
+          },
+          'view_template': {
+            'url' :'.view_template', 'text' : 'Back to the template'
+          }
+        }
+      %}
+
+      {{ page_footer(
+        back_link=url_for(
+          back_link_dict[return_to]['url'],
+          service_id=current_service.id,
+          template_id=template_id),
+        back_link_text=back_link_dict[return_to]['text']
+        ) }}
+
+    </div>
+  </div>
+
+{% endblock %}

tests/app/main/views/test_send.py

@@ -38,6 +38,32 @@ def test_that_test_files_exist():
     assert len(test_non_spreadsheet_files) == 6
 
 
+def test_should_not_allow_files_to_be_uploaded_without_the_correct_permission(
+    logged_in_client,
+    mock_get_service_template,
+    service_one,
+    fake_uuid,
+):
+    template_id = fake_uuid
+    service_one['permissions'] = []
+
+    response = logged_in_client.get(url_for(
+        '.send_messages',
+        service_id=service_one['id'],
+        template_id=template_id),
+        follow_redirects=True)
+    page = BeautifulSoup(response.data.decode('utf-8'), 'html.parser')
+
+    assert response.status_code == 200
+    assert page.select('main p')[0].text.strip() == "Sending text messages is an invitation‑only feature."
+    assert page.select(".page-footer-back-link")[0].text == "Back to the template"
+    assert page.select(".page-footer-back-link")[0]['href'] == url_for(
+        '.view_template',
+        service_id=service_one['id'],
+        template_id=template_id,
+    )
+
+
 @pytest.mark.parametrize(
     "filename, acceptable_file",
     list(zip(
@@ -310,6 +336,32 @@ def test_send_test_step_redirects_if_session_not_setup(
         assert session['recipient'] == expected_recipient
 
 
+def test_send_one_off_does_not_send_without_the_correct_permissions(
+    logged_in_client,
+    mock_get_service_template,
+    service_one,
+    fake_uuid,
+):
+    template_id = fake_uuid
+    service_one['permissions'] = []
+
+    response = logged_in_client.get(url_for(
+        '.send_one_off',
+        service_id=service_one['id'],
+        template_id=template_id),
+        follow_redirects=True)
+    page = BeautifulSoup(response.data.decode('utf-8'), 'html.parser')
+
+    assert response.status_code == 200
+    assert page.select('main p')[0].text.strip() == "Sending text messages is an invitation‑only feature."
+    assert page.select(".page-footer-back-link")[0].text == "Back to the template"
+    assert page.select(".page-footer-back-link")[0]['href'] == url_for(
+        '.view_template',
+        service_id=service_one['id'],
+        template_id=template_id,
+    )
+
+
 @pytest.mark.parametrize('template_mock, partial_url, expected_h1, tour_shown', [
     (
         mock_get_service_template_with_placeholders,
@@ -542,11 +594,15 @@ def test_send_test_redirects_to_start_if_index_out_of_bounds_and_some_placeholde
 ])
 def _redirects_with_help_argument(
     logged_in_client,
+    mocker,
     service_one,
     fake_uuid,
     endpoint,
     expected_redirect,
 ):
+    template = {'data': {'template_type': 'sms'}}
+    mocker.patch('app.service_api_client.get_service_template', return_value=template)
+
     response = logged_in_client.get(
         url_for(endpoint, service_id=service_one['id'], template_id=fake_uuid, help=1)
     )
@@ -848,6 +904,8 @@ def test_send_test_clears_session(
     service_one,
     fake_uuid,
 ):
+    template = {'data': {'template_type': 'sms'}}
+    mocker.patch('app.service_api_client.get_service_template', return_value=template)
 
     with logged_in_client.session_transaction() as session:
         session['recipient'] = '07700900001'

tests/app/main/views/test_templates.py

@@ -266,6 +266,64 @@ def test_dont_show_preview_letter_templates_for_bad_filetype(
     assert mock_get_service_template.called is False
 
 
+@pytest.mark.parametrize('type_of_template', ['email', 'sms'])
+def test_should_not_allow_creation_of_template_through_form_without_correct_permission(
+    logged_in_client,
+    service_one,
+    mocker,
+    type_of_template,
+):
+    service_one['permissions'] = []
+    template_description = {'sms': 'text messages', 'email': 'emails'}
+
+    response = logged_in_client.post(url_for(
+        '.add_template_by_type',
+        service_id=service_one['id']),
+        data={'template_type': type_of_template},
+        follow_redirects=True)
+
+    page = BeautifulSoup(response.data.decode('utf-8'), 'html.parser')
+
+    assert response.status_code == 200
+    assert page.select('main p')[0].text.strip() == \
+        "Sending {} is an invitation‑only feature.".format(template_description[type_of_template])
+    assert page.select(".page-footer-back-link")[0].text == "Back to add new template"
+    assert page.select(".page-footer-back-link")[0]['href'] == url_for(
+        '.add_template_by_type',
+        service_id=service_one['id'],
+        template_id='0',
+    )
+
+
+@pytest.mark.parametrize('type_of_template', ['email', 'sms'])
+def test_should_not_allow_creation_of_a_template_without_correct_permission(
+    logged_in_client,
+    service_one,
+    mocker,
+    type_of_template,
+):
+    service_one['permissions'] = []
+    template_description = {'sms': 'text messages', 'email': 'emails'}
+
+    response = logged_in_client.get(url_for(
+        '.add_service_template',
+        service_id=service_one['id'],
+        template_type=type_of_template),
+        follow_redirects=True)
+
+    page = BeautifulSoup(response.data.decode('utf-8'), 'html.parser')
+
+    assert response.status_code == 200
+    assert page.select('main p')[0].text.strip() == \
+        "Sending {} is an invitation‑only feature.".format(template_description[type_of_template])
+    assert page.select(".page-footer-back-link")[0].text == "Back to templates"
+    assert page.select(".page-footer-back-link")[0]['href'] == url_for(
+        '.choose_template',
+        service_id=service_one['id'],
+        template_id='0',
+    )
+
+
 def test_should_redirect_when_saving_a_template(
     logged_in_client,
     active_user_with_permissions,
@@ -336,6 +394,32 @@ def test_should_edit_content_when_process_type_is_priority_not_platform_admin(
     )
 
 
+def test_should_not_allow_template_edits_without_correct_permission(
+    logged_in_client,
+    mock_get_service_template,
+    service_one,
+    fake_uuid,
+):
+    template_id = fake_uuid
+    service_one['permissions'] = ['email']
+
+    response = logged_in_client.get(url_for(
+        '.edit_service_template',
+        service_id=service_one['id'],
+        template_id=template_id),
+        follow_redirects=True)
+    page = BeautifulSoup(response.data.decode('utf-8'), 'html.parser')
+
+    assert response.status_code == 200
+    assert page.select('main p')[0].text.strip() == "Sending text messages is an invitation‑only feature."
+    assert page.select(".page-footer-back-link")[0].text == "Back to the template"
+    assert page.select(".page-footer-back-link")[0]['href'] == url_for(
+        '.view_template',
+        service_id=service_one['id'],
+        template_id=template_id,
+    )
+
+
 def test_should_403_when_edit_template_with_process_type_of_priority_for_non_platform_admin(
     client,
     active_user_with_permissions,

tests/conftest.py

@@ -78,7 +78,7 @@ def mock_get_service(mocker, api_user_active):
 @pytest.fixture(scope='function')
 def mock_get_international_service(mocker, api_user_active):
     def _get(service_id):
-        service = service_json(service_id, users=[api_user_active.id], permissions=['international_sms'])
+        service = service_json(service_id, users=[api_user_active.id], permissions=['sms', 'international_sms'])
         return {'data': service}
 
     return mocker.patch('app.service_api_client.get_service', side_effect=_get)