WIP

api/controllers/web/workflow_events.py

@@ -0,0 +1,97 @@
+"""
+Web App Workflow Resume APIs.
+"""
+
+import logging
+import time
+from collections.abc import Generator
+
+from flask import Response
+
+from controllers.web import api
+from controllers.web.wraps import WebApiResource
+
+logger = logging.getLogger(__name__)
+
+
+class WorkflowResumeWaitApi(WebApiResource):
+    """API for long-polling workflow resume wait."""
+
+    def get(self, task_id: str):
+        """
+        Get workflow execution resume notification.
+
+        GET /api/workflow/<task_id>/resume-wait
+
+        This is a long-polling API that waits for workflow to resume from paused state.
+        """
+        # TODO: Implement actual workflow status checking
+        # For now, return a basic response
+
+        timeout = 30  # 30 seconds timeout for demo
+        start_time = time.time()
+
+        while time.time() - start_time < timeout:
+            # TODO: Check workflow status from database/cache
+            # workflow_status = workflow_service.get_status(task_id)
+
+            # For demo purposes, simulate different states
+            # In real implementation, this would check the actual workflow state
+            workflow_status = "paused"  # or "running" or "ended"
+
+            if workflow_status == "running":
+                return {"status": "running"}, 200
+            elif workflow_status == "ended":
+                return {"status": "ended"}, 200
+
+            time.sleep(1)  # Poll every second
+
+        # Return paused status if timeout reached
+        return {"status": "paused"}, 200
+
+
+class WorkflowEventsApi(WebApiResource):
+    """API for getting workflow execution events after resume."""
+
+    def get(self, task_id: str):
+        """
+        Get workflow execution events stream after resume.
+
+        GET /api/workflow/<task_id>/events
+
+        Returns Server-Sent Events stream.
+        """
+
+        def generate_events() -> Generator[str, None, None]:
+            """Generate SSE events for workflow execution."""
+            try:
+                # TODO: Implement actual event streaming
+                # This would connect to the workflow execution engine
+                # and stream real-time events
+
+                # For demo purposes, send a basic event
+                yield f"data: {{'event': 'workflow_resumed', 'task_id': '{task_id}'}}\n\n"
+
+                # In real implementation, this would:
+                # 1. Connect to workflow execution engine
+                # 2. Stream real-time execution events
+                # 3. Handle client disconnection
+                # 4. Clean up resources on completion
+
+            except Exception as e:
+                logger.exception("Error streaming events for task %s", task_id)
+                yield f"data: {{'error': 'Stream error: {str(e)}'}}\n\n"
+
+        return Response(
+            generate_events(),
+            mimetype="text/event-stream",
+            headers={
+                "Cache-Control": "no-cache",
+                "Connection": "keep-alive",
+            },
+        )
+
+
+# Register the APIs
+api.add_resource(WorkflowResumeWaitApi, "/workflow/<string:task_id>/resume-wait")
+api.add_resource(WorkflowEventsApi, "/workflow/<string:task_id>/events")