Change "Deploy Environment" button

If environment already has deployed services, and new ones are
added, button "Deploy Environment" changes to "Update
Environment". It removes confusion for the user who might think
that the whole environment will be redeployed from scratch.
For deployment of multiple environments at once the button is
still called "Deploy Environments" in any case.

Change-Id: I6bb4b563e11ce32da0ce5dde00dd32ad6e38f299
Closes-bug: #1392874

muranodashboard/environments/tables.py

@@ -58,6 +58,15 @@ def _check_row_actions_allowed(action, request):
     return False
 
 
+def _environment_has_deployed_services(request, environment_id):
+    deployments = api.deployments_list(request, environment_id)
+    if not deployments:
+        return False
+    if not deployments[0].description['services']:
+        return False
+    return True
+
+
 class AddApplication(tables.LinkAction):
     name = 'AddApplication'
     verbose_name = _('Add Component')
@@ -230,7 +239,7 @@ class DeployEnvironment(tables.BatchAction):
     icon = "play"
 
     @staticmethod
-    def action_present(count):
+    def action_present_deploy(count):
         return ungettext_lazy(
             u"Deploy Environment",
             u"Deploy Environments",
@@ -238,13 +247,34 @@ class DeployEnvironment(tables.BatchAction):
         )
 
     @staticmethod
-    def action_past(count):
+    def action_past_deploy(count):
         return ungettext_lazy(
             u"Deployed Environment",
             u"Deployed Environments",
             count
         )
 
+    @staticmethod
+    def action_present_update(count):
+        return ungettext_lazy(
+            u"Update Environment",
+            # there can be cases when some of the envs are new and some are not
+            # so it is better to just leave "Deploy" for multiple envs
+            u"Deploy Environments",
+            count
+        )
+
+    @staticmethod
+    def action_past_update(count):
+        return ungettext_lazy(
+            u"Updated Environment",
+            u"Deployed Environments",
+            count
+        )
+
+    action_present = action_present_deploy
+    action_past = action_past_deploy
+
     def allowed(self, request, environment):
         """Limit when 'Deploy Environment' button is shown
 
@@ -253,6 +283,8 @@ class DeployEnvironment(tables.BatchAction):
         * delete is in progress
         * no new services added to the environment (after env creation
           or successful deploy or delete failure)
+        If environment has already deployed services,
+        button is shown as 'Update environment'
         """
 
         # table action case: action allowed if any row action allowed
@@ -260,6 +292,13 @@ class DeployEnvironment(tables.BatchAction):
             return _check_row_actions_allowed(self, request)
 
         # row action case
+        if _environment_has_deployed_services(request, environment.id):
+            self.action_present = self.action_present_update
+            self.action_past = self.action_past_update
+        else:
+            self.action_present = self.action_present_deploy
+            self.action_past = self.action_past_deploy
+
         status = getattr(environment, 'status', None)
         if (status != consts.STATUS_ID_DEPLOY_FAILURE and
                 not environment.has_new_services):
@@ -286,14 +325,22 @@ class DeployThisEnvironment(tables.Action):
     icon = "play"
 
     def allowed(self, request, service):
-        """Limit when 'Deploy Environment' button is shown
+        """Limit when 'Deploy This Environment' button is shown
 
         'Deploy environment' is not shown in several cases:
         * when deploy is already in progress
         * delete is in progress
         * env was just created and no apps added
         * previous deployment finished successfully
+        If environment has already deployed services, button is shown
+        as 'Update This Environment'
         """
+        environment_id = self.table.kwargs['environment_id']
+        if _environment_has_deployed_services(request, environment_id):
+            self.verbose_name = _('Update This Environment')
+        else:
+            self.verbose_name = _('Deploy This Environment')
+
         status, version = _get_environment_status_and_version(request,
                                                               self.table)
         if (status in consts.NO_ACTION_ALLOWED_STATUSES or