Implement Segmented Workflows

A major source of bugs has been how we've approached inlining
workflows. We no longer inline them as of this commit, and instead
use a stack structure. This commits the result of workflows to the
database before other workflows try to read them, so we don't have
to maintain a code path for when something is or isn't committed
to db.

This patchset allows for workflows to pass limited information
to preset selections

Change-Id: I3d040c7f3024c7420017ae4ec66a23219303dcb6
Signed-off-by: Sawyer Bergeron <sawyerbergeron@gmail.com>

1 files changed, 13 insertions, 1 deletions

diff --git a/src/workflow/views.py b/src/workflow/views.py
index e5ef5c6..6d59b1c 100644
--- a/src/workflow/views.py
+++ b/src/workflow/views.py
@@ -30,6 +30,17 @@ def attempt_auth(request):
 
 
 def delete_session(request):
+    manager = attempt_auth(request)
+
+    if not manager:
+        return HttpResponseGone("No session found that relates to current request")
+
+    if manager.pop_workflow():
+        return HttpResponse('')
+    else:
+        del ManagerTracker.managers[request.session['manager_session']]
+        return render(request, 'workflow/exit_redirect.html')
+
     try:
         del ManagerTracker.managers[request.session['manager_session']]
         return HttpResponse('')
@@ -70,7 +81,8 @@ def manager_view(request):
             logger.debug("edit found")
             manager.add_workflow(workflow_type=request.POST.get('edit'), edit_object=int(request.POST.get('edit_id')))
         elif request.POST.get('cancel') is not None:
-            del ManagerTracker.managers[request.session['manager_session']]
+            if not manager.pop_workflow():
+                del ManagerTracker.managers[request.session['manager_session']]
 
     return manager.status(request)