Basic structure of the freezer web ui integrated in horizon

This commit add to the repo the basic structure of the web ui
integrated with Horizon. There currently nothing under the Freezer
tab, this is only a base point to start to develop the Freezer
ui content.

Basic installation instructionr are available in the file
horizon_web_ui/README.rst

Change-Id: I6e1ef399c869494ec1c5c9dd52a6d9adfd9360c9
LAUNCHPAD: https://blueprints.launchpad.net/freezer/+spec/horizon-webui

README.rst

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+========================
+Freezer - Horizon Web UI
+=======================
+
+Freezer now has basic support for a Web UI integrated with OpenStack Horizon.
+
+In the installation procedure we'll assume your main Horizon dashboard
+directory is /opt/stack/horizon/openstack_dashboard/dashboards/.
+
+To install the horizon web ui you need to do the following::
+
+    # git clone https://github.com/stackforge/freezer
+
+    # cd freezer/horizon_web_ui
+
+    # cp -r devfreezer /opt/stack/horizon/openstack_dashboard/dashboards/
+
+    # cp _50_devfreezer.py  /opt/stack/horizon/openstack_dashboard/enabled/
+    # cd /opt/stack/horizon/
+
+    # ./run_tests.sh --runserver 0.0.0.0:8878
+
+
+Now a new Tab is available in the dashboard lists on the left,
+called "Backup as a Service" and a sub tab called "Freezer".
+

_50_devfreezer.py

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+# The name of the dashboard to be added to HORIZON['dashboards']. Required.
+DASHBOARD = 'devfreezer'
+
+# If set to True, this dashboard will not be added to the settings.
+DISABLED = False
+
+# A list of applications to be added to INSTALLED_APPS.
+ADD_INSTALLED_APPS = [
+    'openstack_dashboard.dashboards.devfreezer',
+]

devfreezer/dashboard.py

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+from django.utils.translation import ugettext_lazy as _
+
+import horizon
+
+
+class Devfreezer(horizon.Dashboard):
+    name = _("Backup as a Service")
+    slug = "devfreezer"
+    panels = ('freezerweb',)  # Add your panels here.
+    default_panel = 'freezerweb'  # Specify the slug of the dashboard's default panel.
+
+
+horizon.register(Devfreezer)

devfreezer/freezerweb/models.py

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+"""
+Stub file to work around django bug: https://code.djangoproject.com/ticket/7198
+"""

devfreezer/freezerweb/panel.py

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+from django.utils.translation import ugettext_lazy as _
+
+import horizon
+
+from openstack_dashboard.dashboards.devfreezer import dashboard
+
+
+class Freezerweb(horizon.Panel):
+    name = _("Freezer")
+    slug = "freezerweb"
+
+
+dashboard.Devfreezer.register(Freezerweb)

devfreezer/freezerweb/tables.py

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+from django.utils.translation import ugettext_lazy as _
+
+from horizon import tables
+
+
+class InstancesTable(tables.DataTable):
+    name = tables.Column("name", verbose_name=_("Name"))
+    status = tables.Column("status", verbose_name=_("Status"))
+    zone = tables.Column('availability_zone',
+                          verbose_name=_("Availability Zone"))
+    image_name = tables.Column('image_name', verbose_name=_("Image Name"))
+
+    class Meta:
+        name = "instances"
+        verbose_name = _("Instances")

devfreezer/freezerweb/tabs.py

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+from django.utils.translation import ugettext_lazy as _
+
+from horizon import exceptions
+from horizon import tabs
+
+from openstack_dashboard import api
+from openstack_dashboard.dashboards.devfreezer.freezerweb import tables
+
+
+class InstanceTab(tabs.TableTab):
+    name = _("Instances Tab")
+    slug = "instances_tab"
+    table_classes = (tables.InstancesTable,)
+    template_name = ("horizon/common/_detail_table.html")
+    preload = False
+
+    def has_more_data(self, table):
+        return self._has_more
+
+    def get_instances_data(self):
+        try:
+            marker = self.request.GET.get(
+                        tables.InstancesTable._meta.pagination_param, None)
+
+            instances, self._has_more = api.nova.server_list(
+                self.request,
+                search_opts={'marker': marker, 'paginate': True})
+
+            return instances
+        except Exception:
+            self._has_more = False
+            error_message = _('Unable to get instances')
+            exceptions.handle(self.request, error_message)
+
+
+class MypanelTabs(tabs.TabGroup):
+    slug = "mypanel_tabs"
+    tabs = (InstanceTab,)
+    sticky = True

devfreezer/freezerweb/templates/freezerweb/index.html

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+{% extends 'base.html' %}
+{% load i18n %}
+{% block title %}{% trans "Freezer Web Interface" %}{% endblock %}
+
+{% block page_header %}
+  {% include "horizon/common/_page_header.html" with title=_("Freezer Web Interface") %}
+{% endblock page_header %}
+
+{% block devfreezer_main %}
+  <div class="row">
+    <div class="col-sm-12">
+    {{ tab_group.render }}
+    </div>
+</div>
+{% endblock %}
+
+

devfreezer/freezerweb/tests.py

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+from horizon.test import helpers as test
+
+
+class FreezerwebTests(test.TestCase):
+    # Unit tests for freezerweb.
+    def test_me(self):
+        self.assertTrue(1 + 1 == 2)

devfreezer/freezerweb/urls.py

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+from django.conf.urls import patterns
+from django.conf.urls import url
+
+from .views import IndexView
+from openstack_dashboard.dashboards.devfreezer.freezerweb import views
+
+
+urlpatterns = patterns('',
+    url(r'^$', views.IndexView.as_view(), name='index'),
+   url(r'^\?tab=mypanel_tabs_tab$',
+        views.IndexView.as_view(), name='mypanel_tabs')
+)

devfreezer/freezerweb/views.py

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+from horizon import views
+
+from horizon import tabs
+
+from openstack_dashboard.dashboards.devfreezer.freezerweb \
+    import tabs as mydashboard_tabs 
+
+class IndexView(tabs.TabbedTableView):
+    tab_group_class = mydashboard_tabs.MypanelTabs
+    # A very simple class-based view...
+    template_name = 'devfreezer/freezerweb/index.html'
+
+    def get_data(self, request, context, *args, **kwargs):
+        # Add data to the context here...
+        return context
+

devfreezer/models.py

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+"""
+Stub file to work around django bug: https://code.djangoproject.com/ticket/7198
+"""

devfreezer/static/devfreezer/css/devfreezer.css

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+/* Additional CSS for devfreezer. */

devfreezer/static/devfreezer/js/devfreezer.js

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+/* Additional JavaScript for devfreezer. */

devfreezer/templates/devfreezer/base.html

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+{% extends 'base.html' %}
+
+{% block sidebar %}
+  {% include 'horizon/common/_sidebar.html' %}
+{% endblock %}
+
+{% block main %}
+    {% include "horizon/_messages.html" %}
+    {% block devfreezer_main %}{% endblock %}
+{% endblock %}
+