Add support for workflow transition triggers.

Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>

mayan/apps/document_states/handlers.py

@@ -1,8 +1,36 @@
 from __future__ import unicode_literals
 
 from django.apps import apps
+from django.utils.translation import ugettext_lazy as _
 
 from document_indexing.tasks import task_index_document
+from events.classes import Event
+
+
+def handler_index_document(sender, **kwargs):
+    task_index_document.apply_async(
+        kwargs=dict(
+            document_id=kwargs['instance'].workflow_instance.document.pk
+        )
+    )
+
+
+def handler_trigger_transition(sender, **kwargs):
+    action = kwargs['instance']
+
+    WorkflowInstance = apps.get_model(
+        app_label='document_states', model_name='WorkflowInstance'
+    )
+    WorkflowTransition = apps.get_model(
+        app_label='document_states', model_name='WorkflowTransition'
+    )
+
+    for transition in WorkflowTransition.objects.filter(trigger_events__event_type__name=kwargs['instance'].verb):
+        for workflow_instance in WorkflowInstance.objects.filter(workflow__transitions=transition, document=action.target):
+            workflow_instance.do_transition(
+                comment=_('Event trigger: %s') % Event.get(name=action.verb).label,
+                transition=transition
+            )
 
 
 def launch_workflow(sender, instance, created, **kwargs):
@@ -12,11 +40,3 @@ def launch_workflow(sender, instance, created, **kwargs):
 
     if created:
         Workflow.objects.launch_for(instance)
-
-
-def handler_index_document(sender, **kwargs):
-    task_index_document.apply_async(
-        kwargs=dict(
-            document_id=kwargs['instance'].workflow_instance.document.pk
-        )
-    )