handle subprocesses in navigation

spiffworkflow-backend/src/spiffworkflow_backend/services/process_instance_processor.py

@@ -34,6 +34,8 @@ from SpiffWorkflow.bpmn.serializer.workflow import BpmnWorkflowSerializer  # typ
 from SpiffWorkflow.bpmn.specs.BpmnProcessSpec import BpmnProcessSpec  # type: ignore
 from SpiffWorkflow.bpmn.specs.events.EndEvent import EndEvent  # type: ignore
 from SpiffWorkflow.bpmn.specs.events.event_definitions import CancelEventDefinition  # type: ignore
+from SpiffWorkflow.bpmn.specs.events.StartEvent import StartEvent  # type: ignore
+from SpiffWorkflow.bpmn.specs.SubWorkflowTask import SubWorkflowTask  # type: ignore
 from SpiffWorkflow.bpmn.workflow import BpmnWorkflow  # type: ignore
 from SpiffWorkflow.dmn.parser.BpmnDmnParser import BpmnDmnParser  # type: ignore
 from SpiffWorkflow.dmn.serializer.task_spec_converters import BusinessRuleTaskConverter  # type: ignore
@@ -68,7 +70,6 @@ from SpiffWorkflow.spiff.serializer.task_spec_converters import UserTaskConverte
 from SpiffWorkflow.task import Task as SpiffTask  # type: ignore
 from SpiffWorkflow.task import TaskState
 from SpiffWorkflow.util.deep_merge import DeepMerge  # type: ignore
-
 from spiffworkflow_backend.models.file import File
 from spiffworkflow_backend.models.file import FileType
 from spiffworkflow_backend.models.group import GroupModel
@@ -301,7 +302,9 @@ class ProcessInstanceProcessor:
         tld.spiff_step = process_instance_model.spiff_step
 
         # we want this to be the fully qualified path to the process model including all group subcomponents
-        current_app.config["THREAD_LOCAL_DATA"].process_model_identifier = (
+        current_app.config[
+            "THREAD_LOCAL_DATA"
+        ].process_model_identifier = (
             f"{process_instance_model.process_model_identifier}"
         )
 
@@ -655,9 +658,9 @@ class ProcessInstanceProcessor:
         """
         for task_id, subprocess_id in subprocesses_by_child_task_ids.items():
             if subprocess_id in subprocesses_by_child_task_ids:
-                subprocesses_by_child_task_ids[task_id] = (
-                    subprocesses_by_child_task_ids[subprocess_id]
-                )
+                subprocesses_by_child_task_ids[
+                    task_id
+                ] = subprocesses_by_child_task_ids[subprocess_id]
                 self.get_highest_level_subprocesses_by_child_task_ids(
                     subprocesses_by_child_task_ids
                 )
@@ -787,7 +790,16 @@ class ProcessInstanceProcessor:
                 f"Manually executing Task {spiff_task.task_spec.name} of process"
                 f" instance {self.process_instance_model.id}"
             )
-            spiff_task.complete()
+            # Executing a subworkflow manually will restart its subprocess and allow stepping through it
+            if isinstance(spiff_task.task_spec, SubWorkflowTask):
+                subprocess = self.bpmn_process_instance.get_subprocess(spiff_task)
+                # We have to get to the actual start event
+                for task in self.bpmn_process_instance.get_tasks(workflow=subprocess):
+                    task.complete()
+                    if isinstance(task.task_spec, StartEvent):
+                        break
+            else:
+                spiff_task.complete()
         else:
             spiff_logger = logging.getLogger("spiff")
             spiff_logger.info(
@@ -796,7 +808,20 @@ class ProcessInstanceProcessor:
             spiff_task._set_state(TaskState.COMPLETED)
             for child in spiff_task.children:
                 child.task_spec._update(child)
-        self.bpmn_process_instance.last_task = spiff_task
+            spiff_task.workflow.last_task = spiff_task
+
+        if isinstance(spiff_task.task_spec, EndEvent):
+            for task in self.bpmn_process_instance.get_tasks(
+                TaskState.DEFINITE_MASK, workflow=spiff_task.workflow
+            ):
+                task.complete()
+
+        # A subworkflow task will become ready when its workflow is complete.  Engine steps would normally
+        # then complete it, but we have to do it ourselves here.
+        for task in self.bpmn_process_instance.get_tasks(TaskState.READY):
+            if isinstance(task.task_spec, SubWorkflowTask):
+                task.complete()
+
         self.increment_spiff_step()
         self.add_step()
         self.save()

spiffworkflow-frontend/src/routes/ProcessInstanceShow.tsx

@@ -528,11 +528,24 @@ export default function ProcessInstanceShow({ variant }: OwnProps) {
     }
   };
 
+  const isCurrentTask = (task: any) => {
+    const subprocessTypes = [
+      'Subprocess',
+      'Call Activity',
+      'Transactional Subprocess',
+    ];
+    return (
+      (task.state === 'WAITING' &&
+        subprocessTypes.filter((t) => t === task.type).length > 0) ||
+      task.state === 'READY'
+    );
+  };
+
   const canEditTaskData = (task: any) => {
     return (
       processInstance &&
       ability.can('PUT', targetUris.processInstanceTaskListDataPath) &&
-      task.state === 'READY' &&
+      isCurrentTask(task) &&
       processInstance.status === 'suspended' &&
       showingLastSpiffStep()
     );
@@ -556,7 +569,7 @@ export default function ProcessInstanceShow({ variant }: OwnProps) {
       processInstance &&
       processInstance.status === 'suspended' &&
       ability.can('POST', targetUris.processInstanceCompleteTaskPath) &&
-      task.state === 'READY' &&
+      isCurrentTask(task) &&
       showingLastSpiffStep()
     );
   };