UI: Execution update - update description modal

* added table action button and a modal to
  update execution description

Screenshots:
http://pasteboard.co/2fTvPcAA.png
http://pasteboard.co/2fTCIKAL.png
http://pasteboard.co/2fTENJz7.png

Partially implements blueprint: mistral-dashboard-executions-screen

Change-Id: If0e096b674640e12a095607c333954719a5ad594

mistraldashboard/executions/forms.py

@@ -0,0 +1,45 @@
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from django.core.urlresolvers import reverse
+from django.utils.translation import ugettext_lazy as _
+
+from horizon import exceptions
+from horizon import forms
+from horizon import messages
+
+from mistraldashboard import api
+
+
+class UpdateDescriptionForm(forms.SelfHandlingForm):
+    execution_id = forms.CharField(label=_("Execution ID"),
+                                   widget=forms.HiddenInput(),
+                                   required=False)
+    description = forms.CharField(max_length=255,
+                                  label=_("Execution description"))
+
+    def handle(self, request, data):
+        try:
+            api.execution_update(
+                request,
+                data["execution_id"],
+                "description",
+                data["description"])
+            msg = _('Successfully updated execution description.')
+            messages.success(request, msg)
+
+            return True
+
+        except Exception:
+            msg = _('Failed to update execution description.')
+            redirect = reverse('horizon:mistral:executions:index')
+            exceptions.handle(request, msg, redirect=redirect)

mistraldashboard/executions/tables.py

@@ -130,6 +130,13 @@ class ResumeExecution(tables.BatchAction):
         api.execution_update(request, obj_id, "state", "RUNNING")
 
 
+class UpdateDescription(tables.LinkAction):
+    name = "updateDescription"
+    verbose_name = _("Update Description")
+    url = "horizon:mistral:executions:update_description"
+    classes = ("ajax-modal",)
+
+
 class ExecutionsTable(tables.DataTable):
     id = tables.Column(
         "id",
@@ -185,5 +192,6 @@ class ExecutionsTable(tables.DataTable):
         name = "executions"
         verbose_name = _("Executions")
         table_actions = (DeleteExecution, tables.FilterAction)
-        row_actions = (DeleteExecution, PauseExecution,
-                       CancelExecution, ResumeExecution, DeleteExecution)
+        row_actions = (DeleteExecution, UpdateDescription,
+                       PauseExecution, CancelExecution,
+                       ResumeExecution, DeleteExecution)

mistraldashboard/executions/templates/executions/_update_description.html

@@ -0,0 +1,7 @@
+{% extends "horizon/common/_modal_form.html" %}
+{% load i18n %}
+
+{% block modal-body-right %}
+    <h3>{% trans "Description:" %}</h3>
+    <p>{% trans "Enter execution description." %}</p>
+{% endblock %}

mistraldashboard/executions/templates/executions/update_description.html

@@ -0,0 +1,11 @@
+{% extends 'base.html' %}
+{% load i18n %}
+{% block title %}{% endblock %}
+
+{% block page_header %}
+  {% include "horizon/common/_page_header.html" %}
+{% endblock page_header %}
+
+{% block main %}
+    {% include 'mistral/executions/_update_description.html' %}
+{% endblock %}

mistraldashboard/executions/urls.py

@@ -31,4 +31,7 @@ urlpatterns = patterns(
         {'column': 'output'}, name='output'),
     url(EXECUTIONS % 'input', views.CodeView.as_view(),
         {'column': 'input'}, name='input'),
+    url(EXECUTIONS % 'update_description',
+        views.UpdateDescriptionView.as_view(),
+        name='update_description'),
 )

mistraldashboard/executions/views.py

@@ -26,6 +26,7 @@ from horizon import tables
 
 from mistraldashboard import api
 from mistraldashboard.default.utils import prettyprint
+from mistraldashboard.executions.forms import UpdateDescriptionForm
 from mistraldashboard.executions.tables import ExecutionsTable
 from mistraldashboard import forms as mistral_forms
 
@@ -149,3 +150,27 @@ class CodeView(forms.ModalFormView):
         context['io'] = io
 
         return context
+
+
+class UpdateDescriptionView(forms.ModalFormView):
+    template_name = 'mistral/executions/update_description.html'
+    modal_header = _("Update Execution Description")
+    form_id = "update_execution_description"
+    form_class = UpdateDescriptionForm
+    submit_label = _("Update")
+    success_url = reverse_lazy("horizon:mistral:executions:index")
+    submit_url = "horizon:mistral:executions:update_description"
+    cancel_url = "horizon:mistral:executions:index"
+    page_title = _("Update Execution Description")
+
+    def get_initial(self):
+        return {"execution_id": self.kwargs["execution_id"]}
+
+    def get_context_data(self, **kwargs):
+        context = super(UpdateDescriptionView, self).get_context_data(**kwargs)
+        context['submit_url'] = reverse(
+            self.submit_url,
+            args=[self.kwargs["execution_id"]]
+        )
+
+        return context