From 616af37407435b3b9550394dc7013c4e18123cc5 Mon Sep 17 00:00:00 2001
From: James Valleroy <jvalleroy@mailbox.org>
Date: Sat, 25 Aug 2018 20:47:57 -0400
Subject: [PATCH] backups: Disable create archive when no supported apps are
 installed

Signed-off-by: James Valleroy <jvalleroy@mailbox.org>
Reviewed-by: Joseph Nuthalapati <njoseph@thoughtworks.com>
---
 plinth/modules/backups/templates/backups.html | 10 ++++++++++
 plinth/modules/backups/views.py               |  3 +++
 2 files changed, 13 insertions(+)

diff --git a/plinth/modules/backups/templates/backups.html b/plinth/modules/backups/templates/backups.html
index f42e4b74b..f37636334 100644
--- a/plinth/modules/backups/templates/backups.html
+++ b/plinth/modules/backups/templates/backups.html
@@ -39,6 +39,7 @@
     <p>{{ paragraph|safe }}</p>
   {% endfor %}
 
+  {% if available_apps %}
   <p>
     <a title="{% trans 'Create archive' %}"
        role="button" class="btn btn-primary"
@@ -46,6 +47,15 @@
       {% trans 'Create archive' %}
     </a>
   </p>
+  {% else %}
+  <p>
+    {% blocktrans trimmed %}
+      No apps that support backup are currently installed. After any app
+      that supports backup has been installed, then it will be possible to
+      create backups.
+    {% endblocktrans %}
+  </p>
+  {% endif %}
 
   <h3>{% trans 'Backup archives' %}</h3>
   {% if not archives %}
diff --git a/plinth/modules/backups/views.py b/plinth/modules/backups/views.py
index e0e1dc7cf..506854f8f 100644
--- a/plinth/modules/backups/views.py
+++ b/plinth/modules/backups/views.py
@@ -29,6 +29,7 @@ from django.views.generic import FormView, TemplateView
 from urllib.parse import unquote
 
 from plinth.modules import backups
+from .backups import _list_of_all_apps_for_backup
 
 from .forms import CreateArchiveForm, ExportArchiveForm
 
@@ -45,6 +46,8 @@ class IndexView(TemplateView):
         context['info'] = backups.get_info()
         context['archives'] = backups.list_archives()
         context['exports'] = backups.get_export_files()
+        apps = _list_of_all_apps_for_backup()
+        context['available_apps'] = [x[0] for x in apps]
         return context