Wrap mistralclient code in api.py

All mistralclient specific code should be wrapped in api.py,
see discusstion on:
https://review.openstack.org/#/c/198056/1/mistraldashboard/executions/views.py

Change-Id: Idcf94f523473bdb31c257ca2054942fe79ea54ba

mistraldashboard/api.py

@@ -38,3 +38,36 @@ def mistralclient(request):
         ),
         service_type=SERVICE_TYPE
     )
+
+
+def execution_create(request, **data):
+    """Creates new execution."""
+
+    return mistralclient(request).executions.create(**data)
+
+
+def execution_list(request):
+    """Returns all executions."""
+
+    return mistralclient(request).executions.list()
+
+
+def task_list(request, execution_id=None):
+    """Returns all tasks.
+
+    :param execution_id: Workflow execution ID associated with list of Tasks
+    """
+
+    return mistralclient(request).tasks.list(execution_id)
+
+
+def workflow_list(request):
+    """Returns all workflows."""
+
+    return mistralclient(request).workflows.list()
+
+
+def workbook_list(request):
+    """Returns all workbooks."""
+
+    return mistralclient(request).workbooks.list()

mistraldashboard/executions/views.py

@@ -26,7 +26,7 @@ class IndexView(tables.DataTableView):
     template_name = 'mistral/executions/index.html'
 
     def get_data(self):
-        return api.mistralclient(self.request).executions.list()
+        return api.execution_list(self.request)
 
 
 class TaskView(tables.DataTableView):
@@ -34,6 +34,4 @@ class TaskView(tables.DataTableView):
     template_name = 'mistral/executions/index.html'
 
     def get_data(self):
-        return api.mistralclient(self.request).tasks.list(
-            self.kwargs['execution_id']
-        )
+        return api.task_list(self.kwargs['execution_id'])

mistraldashboard/tasks/views.py

@@ -25,4 +25,4 @@ class IndexView(tables.DataTableView):
     template_name = 'mistral/tasks/index.html'
 
     def get_data(self):
-        return api.mistralclient(self.request).tasks.list()
+        return api.task_list(self.request)

mistraldashboard/workbooks/views.py

@@ -25,4 +25,4 @@ class IndexView(tables.DataTableView):
     template_name = 'mistral/workbooks/index.html'
 
     def get_data(self):
-        return api.mistralclient(self.request).workbooks.list()
+        return api.workbook_list(self.request)

mistraldashboard/workflows/forms.py

@@ -44,7 +44,7 @@ class ExecuteForm(forms.SelfHandlingForm):
 
     def handle(self, request, data):
         try:
-            ex = api.mistralclient(request).executions.create(**data)
+            ex = api.execution_create(request, **data)
 
             msg = _('Execution has been created with id "%s".') % ex.id
             messages.success(request, msg)

mistraldashboard/workflows/views.py

@@ -29,7 +29,7 @@ class IndexView(tables.DataTableView):
     template_name = 'mistral/workflows/index.html'
 
     def get_data(self):
-        return api.mistralclient(self.request).workflows.list()
+        return api.workflow_list(self.request)
 
 
 class ExecuteView(forms.ModalFormView):