Action interruption progress

app/imports/api/engine/action/tasks/applyTask.ts

@@ -20,6 +20,15 @@ export default async function applyTask(
 export default async function applyTask(
   action: EngineAction, task: Task, inputProvider: InputProvider
 ): Promise<void | number> {
+
+  // Pause and wait for the user if the action is being stepped through
+  console.log('applying task', action, inputProvider)
+  if (action._isSimulation && action._stepThrough && inputProvider.nextStep) {
+    console.log('waiting for next step resolution', task)
+    await inputProvider.nextStep(task);
+  }
+
+  // Ensure no more than 100 tasks are performed by a single action
   action.taskCount += 1;
   if (action.taskCount > 100) throw 'Only 100 properties can be applied at once';