wireguard: show server endpoint on main app page

Display the WireGuard server endpoint (ip_address:listen_port)
alongside the public key on the main WireGuard page,
so users configuring clients can copy both values directly.

Signed-off-by: Frederico Gomes <fredericojfgomes@gmail.com>
[sunil: Keep the docstring]
[sunil: Adjust markup to eliminate <p> inside <p>]
[sunil: Produce a single <pre> tag instead of multiple for multiple domains]
[sunil: Minor refactoring for more concise code]
Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
Reviewed-by: Sunil Mohan Adapa <sunil@medhas.org>

plinth/modules/wireguard/templates/wireguard.html

@@ -48,12 +48,24 @@
     {% blocktrans trimmed %}
       Public key for this {{ box_name }}:
     {% endblocktrans %}
-    {% if server.public_key %}
-      <pre>{{ server.public_key }}</pre>
-    {% else %}
-      <p>{% trans "Not configured yet." %}</p>
-    {% endif %}
   </p>
+  {% if server.public_key %}
+    <pre>{{ server.public_key }}</pre>
+  {% else %}
+    <p>{% trans "Not configured yet." %}</p>
+  {% endif %}
+
+  <p>
+    {% blocktrans trimmed %}
+      Endpoints for this {{ box_name }}:
+    {% endblocktrans %}
+  </p>
+  {% if server_endpoints %}
+    <pre>{% for endpoint in server_endpoints %}{{ endpoint }}
+{% endfor %}</pre>
+  {% else %}
+    <p>{% trans "Not configured yet." %}</p>
+  {% endif %}
 
   <div class="btn-toolbar">
     {% if not server.public_key %}

plinth/modules/wireguard/views.py

@@ -30,8 +30,19 @@ class WireguardView(AppView):
         """Return additional context for rendering the template."""
         context = super().get_context_data(**kwargs)
         info = utils.get_info()
-        context['server'] = info['my_server']
+        server_info = info['my_server']
+        context['server'] = server_info
         context['client_peers'] = info['my_client']['servers']
+        context['server_endpoints'] = []
+
+        if server_info:
+            domains = DomainName.list_names(filter_for_service='wireguard')
+            listen_port = server_info.get('listen_port')
+            context['server_endpoints'] = [
+                f'{domain}:{listen_port}' for domain in domains
+                if not domain.endswith('.local')
+            ]
+
         return context