email_server: Remove tabs from the interface

- All the views are reachable using buttons.

- Add title to the domains page as tabs are removed.

Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
Reviewed-by: James Valleroy <jvalleroy@mailbox.org>

plinth/modules/email_server/templates/email_domains.html

@@ -7,6 +7,8 @@
 
   {{ block.super }}
 
+  <h2>{% trans "Domains" %}</h2>
+
   <form action="{{ request.path }}" method="post">
 
     {% for data in fields %}

plinth/modules/email_server/views.py

@@ -14,27 +14,13 @@ from django.views.generic.edit import FormView
 
 import plinth.actions
 import plinth.utils
-from plinth.views import AppView, render_tabs
+from plinth.views import AppView
 
 from . import aliases as aliases_module
 from . import audit, forms
 
 
-class TabMixin(View):
-    admin_tabs = [('', _('Home')), ('domains', _('Domains'))]
-
-    def get_context_data(self, *args, **kwargs):
-        # Retrieve context data from the next method in the MRO
-        context = super().get_context_data(*args, **kwargs)
-        # Populate context with customized data
-        context['tabs'] = self.render_dynamic_tabs()
-        return context
-
-    def render_dynamic_tabs(self):
-        if plinth.utils.is_user_admin(self.request):
-            return render_tabs(self.request.path, self.admin_tabs)
-
-        return ''
+class ExceptionsMixin(View):
 
     def render_validation_error(self, validation_error, status=400):
         context = self.get_context_data()
@@ -55,7 +41,7 @@ class TabMixin(View):
             return self.render_exception(error)
 
 
-class EmailServerView(TabMixin, AppView):
+class EmailServerView(ExceptionsMixin, AppView):
     """Server configuration page"""
     app_id = 'email_server'
     template_name = 'email_server.html'
@@ -211,7 +197,7 @@ class AliasView(FormView):
         aliases_module.put(self._get_uid(), form.cleaned_data['alias'])
 
 
-class DomainView(TabMixin, TemplateView):
+class DomainView(ExceptionsMixin, TemplateView):
     template_name = 'email_domains.html'
 
     def get_context_data(self, *args, **kwargs):

plinth/views.py

@@ -3,7 +3,6 @@
 Main FreedomBox views.
 """
 
-import io
 import time
 import urllib.parse
 
@@ -12,7 +11,6 @@ from django.core.exceptions import ImproperlyConfigured
 from django.http import Http404, HttpResponseBadRequest, HttpResponseRedirect
 from django.template.response import TemplateResponse
 from django.urls import reverse
-from django.utils.html import escape
 from django.utils.translation import gettext as _
 from django.views.generic import TemplateView
 from django.views.generic.edit import FormView
@@ -332,30 +330,3 @@ def notification_dismiss(request, id):
     notes[0].dismiss()
 
     return HttpResponseRedirect(_get_redirect_url_from_param(request))
-
-
-def render_tabs(request_path, tab_data):
-    """Generate a Bootstrap tab group and return the raw HTML
-
-    :param request_path: value of `request.path`
-    :param tab_data: a list of (page_name, link_text) tuples
-    :returns: raw HTML of the tabs
-    """
-    sb = io.StringIO()
-    sb.write('<ul class="nav nav-tabs">')
-
-    for page_name, link_text in tab_data:
-        cls = 'active' if request_path.endswith('/' + page_name) else ''
-        href = '#' if cls == 'active' else ('./' + page_name)
-        # -- Begin list
-        sb.write('<li class="nav-item">')
-        # -- Begin link
-        sb.write('<a class="nav-link {}" '.format(cls))
-        sb.write('href="{}">'.format(escape(href)))
-        sb.write('{}</a>'.format(escape(link_text)))
-        # -- End link
-        sb.write('</li>')
-        # -- End list
-
-    sb.write('</ul>')
-    return sb.getvalue()