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Backend: implement InteractionBlock (#3810)

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This commit is contained in:
Jonathan Dobson
2025-10-24 16:34:14 -04:00
committed by GitHub
parent f81d4bd5d8
commit 264b1751d4
8 changed files with 420 additions and 1 deletions
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219
skyvern/forge/sdk/workflow/models/block.py
View File

@@ -46,6 +46,7 @@ from skyvern.exceptions import (
)
from skyvern.forge import app
from skyvern.forge.prompts import prompt_engine
from skyvern.forge.sdk.api import email
from skyvern.forge.sdk.api.aws import AsyncAWSClient
from skyvern.forge.sdk.api.azure import AsyncAzureStorageClient
from skyvern.forge.sdk.api.files import (
@@ -3049,6 +3050,223 @@ class WaitBlock(Block):
)
class HumanInteractionBlock(BaseTaskBlock):
"""
A block for human/agent interaction.
For the first pass at this, the implicit behaviour is that the user is given a single binary
choice (a go//no-go).
If the human:
- chooses positively, the workflow continues
- chooses negatively, the workflow is terminated
- does not respond within the timeout period, the workflow terminates
"""
# There is a mypy bug with Literal. Without the type: ignore, mypy will raise an error:
# Parameter 1 of Literal[...] cannot be of type "Any"
block_type: Literal[BlockType.HUMAN_INTERACTION] = BlockType.HUMAN_INTERACTION # type: ignore
instructions: str = "Please review and approve or reject to continue the workflow."
positive_descriptor: str = "Approve"
negative_descriptor: str = "Reject"
timeout_seconds: int = 60 * 60 * 2 # two hours
# email options
sender: str = "hello@skyvern.com"
recipients: list[str] = []
subject: str = "Human interaction required for workflow run"
body: str = "Your interaction is required for a workflow run!"
def format_potential_template_parameters(self, workflow_run_context: WorkflowRunContext) -> None:
super().format_potential_template_parameters(workflow_run_context)
self.instructions = self.format_block_parameter_template_from_workflow_run_context(
self.instructions, workflow_run_context
)
self.body = self.format_block_parameter_template_from_workflow_run_context(self.body, workflow_run_context)
self.subject = self.format_block_parameter_template_from_workflow_run_context(
self.subject, workflow_run_context
)
formatted: list[str] = []
for recipient in self.recipients:
formatted.append(
self.format_block_parameter_template_from_workflow_run_context(recipient, workflow_run_context)
)
self.recipients = formatted
async def execute(
self,
workflow_run_id: str,
workflow_run_block_id: str,
organization_id: str | None = None,
browser_session_id: str | None = None,
**kwargs: dict,
) -> BlockResult:
# avoid circular import
from skyvern.forge.sdk.workflow.models.workflow import WorkflowRunStatus # noqa: PLC0415
LOG.info(
"Pausing workflow for human interaction",
workflow_run_id=workflow_run_id,
recipients=self.recipients,
timeout=self.timeout_seconds,
browser_session_id=browser_session_id,
)
await app.DATABASE.update_workflow_run(
workflow_run_id=workflow_run_id,
status=WorkflowRunStatus.paused,
)
workflow_run = await app.DATABASE.get_workflow_run(
workflow_run_id=workflow_run_id,
organization_id=organization_id,
)
if not workflow_run:
return await self.build_block_result(
success=False,
failure_reason="Workflow run not found",
output_parameter_value=None,
status=BlockStatus.failed,
workflow_run_block_id=workflow_run_block_id,
organization_id=organization_id,
)
workflow_run_context = self.get_workflow_run_context(workflow_run_id)
try:
self.format_potential_template_parameters(workflow_run_context)
except Exception as e:
return await self.build_block_result(
success=False,
failure_reason=f"Failed to format jinja template: {str(e)}",
output_parameter_value=None,
status=BlockStatus.failed,
workflow_run_block_id=workflow_run_block_id,
organization_id=organization_id,
)
workflow_permanent_id = workflow_run.workflow_permanent_id
app_url = f"{settings.SKYVERN_APP_URL}/workflows/{workflow_permanent_id}/{workflow_run_id}/overview"
body = f"{self.body}\n\nKindly visit {app_url}\n\n{self.instructions}\n\n"
subject = f"{self.subject} - Workflow Run ID: {workflow_run_id}"
try:
await email.send(
body=body,
sender=self.sender,
subject=subject,
recipients=self.recipients,
)
email_success = True
email_failure_reason = None
except Exception as ex:
LOG.error(
"Failed to send human interaction email",
workflow_run_id=workflow_run_id,
error=str(ex),
browser_session_id=browser_session_id,
)
email_success = False
email_failure_reason = str(ex)
if not email_success:
return await self.build_block_result(
success=False,
failure_reason=f"Failed to send human interaction email: {email_failure_reason or 'email failed'}",
output_parameter_value=None,
status=BlockStatus.failed,
workflow_run_block_id=workflow_run_block_id,
organization_id=organization_id,
)
# Wait for the timeout_seconds or until the workflow run status changes from paused
start_time = asyncio.get_event_loop().time()
check_interval = 5 # Check every 5 seconds
log_that_we_are_waiting = True
log_wait = 0
while True:
if not log_that_we_are_waiting:
log_wait += check_interval
if log_wait >= 60: # Log every 1 minute
log_that_we_are_waiting = True
log_wait = 0
elapsed_time_seconds = asyncio.get_event_loop().time() - start_time
if log_that_we_are_waiting:
LOG.info(
"Waiting for human interaction...",
workflow_run_id=workflow_run_id,
elapsed_time_seconds=elapsed_time_seconds,
timeout_seconds=self.timeout_seconds,
browser_session_id=browser_session_id,
)
log_that_we_are_waiting = False
# Check if timeout_seconds has elapsed
if elapsed_time_seconds >= self.timeout_seconds:
LOG.info(
"Human Interaction block timeout_seconds reached",
workflow_run_id=workflow_run_id,
elapsed_time_seconds=elapsed_time_seconds,
browser_session_id=browser_session_id,
)
workflow_run_context = self.get_workflow_run_context(workflow_run_id)
success = False
reason = "Timeout elapsed with no human interaction"
result_dict = {"success": success, "reason": reason}
await self.record_output_parameter_value(workflow_run_context, workflow_run_id, result_dict)
return await self.build_block_result(
success=success,
failure_reason=reason,
output_parameter_value=result_dict,
status=BlockStatus.timed_out,
workflow_run_block_id=workflow_run_block_id,
organization_id=organization_id,
)
workflow_run = await app.DATABASE.get_workflow_run(
workflow_run_id=workflow_run_id,
organization_id=organization_id,
)
if workflow_run and workflow_run.status != WorkflowRunStatus.paused:
LOG.info(
"Workflow run status changed from paused",
workflow_run_id=workflow_run_id,
new_status=workflow_run.status,
browser_session_id=browser_session_id,
)
workflow_run_context = self.get_workflow_run_context(workflow_run_id)
result_dict = {"success": True, "reason": f"status_changed:{workflow_run.status}"}
await self.record_output_parameter_value(workflow_run_context, workflow_run_id, result_dict)
return await self.build_block_result(
success=True,
failure_reason=None,
output_parameter_value=result_dict,
status=BlockStatus.completed,
workflow_run_block_id=workflow_run_block_id,
organization_id=organization_id,
)
await asyncio.sleep(min(check_interval, self.timeout_seconds - elapsed_time_seconds))
class ValidationBlock(BaseTaskBlock):
# There is a mypy bug with Literal. Without the type: ignore, mypy will raise an error:
# Parameter 1 of Literal[...] cannot be of type "Any"
@@ -3521,6 +3739,7 @@ BlockSubclasses = Union[
ExtractionBlock,
LoginBlock,
WaitBlock,
HumanInteractionBlock,
FileDownloadBlock,
UrlBlock,
TaskV2Block,

58
skyvern/forge/sdk/workflow/service.py
View File

@@ -38,6 +38,7 @@ from skyvern.forge.sdk.db.enums import TaskType
from skyvern.forge.sdk.models import Step, StepStatus
from skyvern.forge.sdk.schemas.files import FileInfo
from skyvern.forge.sdk.schemas.organizations import Organization
from skyvern.forge.sdk.schemas.persistent_browser_sessions import PersistentBrowserSession
from skyvern.forge.sdk.schemas.tasks import Task
from skyvern.forge.sdk.schemas.workflow_runs import WorkflowRunBlock, WorkflowRunTimeline, WorkflowRunTimelineType
from skyvern.forge.sdk.trace import TraceManager
@@ -60,6 +61,7 @@ from skyvern.forge.sdk.workflow.models.block import (
FileUploadBlock,
ForLoopBlock,
HttpRequestBlock,
HumanInteractionBlock,
LoginBlock,
NavigationBlock,
PDFParserBlock,
@@ -333,6 +335,35 @@ class WorkflowService:
return workflow_run
async def auto_create_browser_session_if_needed(
self,
organization_id: str,
workflow: Workflow,
*,
browser_session_id: str | None = None,
proxy_location: ProxyLocation | None = None,
) -> PersistentBrowserSession | None:
if browser_session_id: # the user has supplied an id, so no need to create one
return None
workflow_definition = workflow.workflow_definition
blocks = workflow_definition.blocks
human_interaction_blocks = [block for block in blocks if block.block_type == BlockType.HUMAN_INTERACTION]
if human_interaction_blocks:
timeouts = [getattr(block, "timeout_seconds", 60 * 60) for block in human_interaction_blocks]
timeout_seconds = sum(timeouts) + 60 * 60
browser_session = await app.PERSISTENT_SESSIONS_MANAGER.create_session(
organization_id=organization_id,
timeout_minutes=timeout_seconds // 60,
proxy_location=proxy_location,
)
return browser_session
return None
@TraceManager.traced_async(ignore_inputs=["organization", "api_key"])
async def execute_workflow(
self,
@@ -424,6 +455,17 @@ class WorkflowService:
)
return workflow_run
browser_session = await self.auto_create_browser_session_if_needed(
organization.organization_id,
workflow,
browser_session_id=browser_session_id,
proxy_location=workflow_run.proxy_location,
)
if browser_session:
browser_session_id = browser_session.persistent_browser_session_id
close_browser_on_completion = True
# Check if there's a related workflow script that should be used instead
workflow_script, _ = await workflow_script_service.get_workflow_script(workflow, workflow_run, block_labels)
current_context = skyvern_context.current()
@@ -595,6 +637,7 @@ class WorkflowService:
if not blocks:
raise SkyvernException(f"No blocks found for the given block labels: {block_labels}")
#
# Execute workflow blocks
blocks_cnt = len(blocks)
block_result = None
@@ -2744,6 +2787,21 @@ class WorkflowService:
include_action_history_in_verification=block_yaml.include_action_history_in_verification,
)
elif block_yaml.block_type == BlockType.HUMAN_INTERACTION:
return HumanInteractionBlock(
label=block_yaml.label,
output_parameter=output_parameter,
instructions=block_yaml.instructions,
positive_descriptor=block_yaml.positive_descriptor,
negative_descriptor=block_yaml.negative_descriptor,
timeout_seconds=block_yaml.timeout_seconds,
# --
sender=block_yaml.sender,
recipients=block_yaml.recipients,
subject=block_yaml.subject,
body=block_yaml.body,
)
elif block_yaml.block_type == BlockType.EXTRACTION:
extraction_block_parameters = (
[parameters[parameter_key] for parameter_key in block_yaml.parameter_keys]