feat(workflow): support human input in loop and iteration (#39243)

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

api/tests/unit_tests/controllers/console/test_human_input_form.py

@@ -4,7 +4,7 @@ import json
 from datetime import UTC, datetime
 from inspect import unwrap
 from types import SimpleNamespace
-from unittest.mock import Mock
+from unittest.mock import ANY, Mock
 
 import pytest
 from flask import Flask, Response
@@ -18,6 +18,7 @@ from controllers.console.human_input_form import (
     WorkflowResponseConverter,
     _jsonify_form_definition,
 )
+from core.workflow.human_input_policy import HumanInputSurface
 from models.account import AccountStatus
 from models.enums import CreatorUserRole
 from models.human_input import RecipientType
@@ -344,3 +345,62 @@ def test_workflow_events_finished(app: Flask, monkeypatch: pytest.MonkeyPatch) -
 
     assert response.mimetype == "text/event-stream"
     assert "data" in response.get_data(as_text=True)
+
+
+def test_workflow_events_snapshot_can_continue_across_pauses(app: Flask, monkeypatch: pytest.MonkeyPatch) -> None:
+    workflow_run = SimpleNamespace(
+        id="run-1",
+        created_by_role=CreatorUserRole.ACCOUNT,
+        created_by="user-1",
+        tenant_id="t1",
+        app_id="app-1",
+        finished_at=None,
+    )
+    app_model = SimpleNamespace(mode=AppMode.WORKFLOW)
+
+    class _RepoStub:
+        def get_workflow_run_by_id_and_tenant_id(self, **_kwargs):
+            return workflow_run
+
+    workflow_generator = Mock()
+    workflow_generator.convert_to_event_stream.return_value = iter(["data: snapshot\n\n"])
+    snapshot_builder = Mock(return_value=["snapshot-events"])
+
+    monkeypatch.setattr(
+        DifyAPIRepositoryFactory,
+        "create_api_workflow_run_repository",
+        lambda *_args, **_kwargs: _RepoStub(),
+    )
+    monkeypatch.setattr(
+        "controllers.console.human_input_form._retrieve_app_for_workflow_run",
+        lambda *_args, **_kwargs: app_model,
+    )
+    monkeypatch.setattr(
+        "controllers.console.human_input_form.WorkflowAppGenerator",
+        lambda: workflow_generator,
+    )
+    monkeypatch.setattr(
+        "controllers.console.human_input_form.build_workflow_event_stream",
+        snapshot_builder,
+    )
+    monkeypatch.setattr("controllers.console.human_input_form.db", SimpleNamespace(engine=object()))
+
+    api = ConsoleWorkflowEventsApi()
+    handler = unwrap(api.get)
+
+    with app.test_request_context(
+        "/console/api/workflow/run-1/events?include_state_snapshot=true&continue_on_pause=true",
+        method="GET",
+    ):
+        response = handler(api, "t1", SimpleNamespace(id="user-1"), workflow_run_id="run-1")
+
+    assert response.get_data(as_text=True) == "data: snapshot\n\n"
+    snapshot_builder.assert_called_once_with(
+        app_mode=AppMode.WORKFLOW,
+        workflow_run=workflow_run,
+        tenant_id="t1",
+        app_id="app-1",
+        session_maker=ANY,
+        human_input_surface=HumanInputSurface.CONSOLE,
+        close_on_pause=False,
+    )