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import json
import time
from datetime import datetime, timezone
from typing import Optional
from core.app.apps.advanced_chat.app_config_manager import AdvancedChatAppConfigManager
from core.app.apps.workflow.app_config_manager import WorkflowAppConfigManager
from core.model_runtime.utils.encoders import jsonable_encoder
from core.workflow.entities.node_entities import NodeType
from core.workflow.errors import WorkflowNodeRunFailedError
from core.workflow.workflow_engine_manager import WorkflowEngineManager
from events.app_event import app_draft_workflow_was_synced, app_published_workflow_was_updated
from extensions.ext_database import db
from models.account import Account
from models.model import App, AppMode
from models.workflow import (
CreatedByRole,
Workflow,
WorkflowNodeExecution,
WorkflowNodeExecutionStatus,
WorkflowNodeExecutionTriggeredFrom,
WorkflowType,
)
from services.errors.app import WorkflowHashNotEqualError
from services.workflow.workflow_converter import WorkflowConverter
class WorkflowService:
"""
Workflow Service
"""
def get_draft_workflow(self, app_model: App) -> Optional[Workflow]:
"""
Get draft workflow
"""
# fetch draft workflow by app_model
workflow = db.session.query(Workflow).filter(
Workflow.tenant_id == app_model.tenant_id,
Workflow.app_id == app_model.id,
Workflow.version == 'draft'
).first()
# return draft workflow
return workflow
def get_published_workflow(self, app_model: App) -> Optional[Workflow]:
"""
Get published workflow
"""
if not app_model.workflow_id:
return None
# fetch published workflow by workflow_id
workflow = db.session.query(Workflow).filter(
Workflow.tenant_id == app_model.tenant_id,
Workflow.app_id == app_model.id,
Workflow.id == app_model.workflow_id
).first()
return workflow
def sync_draft_workflow(self, app_model: App,
graph: dict,
features: dict,
unique_hash: Optional[str],
account: Account) -> Workflow:
"""
Sync draft workflow
@throws WorkflowHashNotEqualError
"""
# fetch draft workflow by app_model
workflow = self.get_draft_workflow(app_model=app_model)
if workflow:
# validate unique hash
if workflow.unique_hash != unique_hash:
raise WorkflowHashNotEqualError()
# validate features structure
self.validate_features_structure(
app_model=app_model,
features=features
)
# create draft workflow if not found
if not workflow:
workflow = Workflow(
tenant_id=app_model.tenant_id,
app_id=app_model.id,
type=WorkflowType.from_app_mode(app_model.mode).value,
version='draft',
graph=json.dumps(graph),
features=json.dumps(features),
created_by=account.id
)
db.session.add(workflow)
# update draft workflow if found
else:
workflow.graph = json.dumps(graph)
workflow.features = json.dumps(features)
workflow.updated_by = account.id
workflow.updated_at = datetime.now(timezone.utc).replace(tzinfo=None)
# commit db session changes
db.session.commit()
# trigger app workflow events
app_draft_workflow_was_synced.send(app_model, synced_draft_workflow=workflow)
# return draft workflow
return workflow
def publish_workflow(self, app_model: App,
account: Account,
draft_workflow: Optional[Workflow] = None) -> Workflow:
"""
Publish workflow from draft
:param app_model: App instance
:param account: Account instance
:param draft_workflow: Workflow instance
"""
if not draft_workflow:
# fetch draft workflow by app_model
draft_workflow = self.get_draft_workflow(app_model=app_model)
if not draft_workflow:
raise ValueError('No valid workflow found.')
# create new workflow
workflow = Workflow(
tenant_id=app_model.tenant_id,
app_id=app_model.id,
type=draft_workflow.type,
version=str(datetime.now(timezone.utc).replace(tzinfo=None)),
graph=draft_workflow.graph,
features=draft_workflow.features,
created_by=account.id
)
# commit db session changes
db.session.add(workflow)
db.session.flush()
db.session.commit()
app_model.workflow_id = workflow.id
db.session.commit()
# trigger app workflow events
app_published_workflow_was_updated.send(app_model, published_workflow=workflow)
# return new workflow
return workflow
def get_default_block_configs(self) -> list[dict]:
"""
Get default block configs
"""
# return default block config
workflow_engine_manager = WorkflowEngineManager()
return workflow_engine_manager.get_default_configs()
def get_default_block_config(self, node_type: str, filters: Optional[dict] = None) -> Optional[dict]:
"""
Get default config of node.
:param node_type: node type
:param filters: filter by node config parameters.
:return:
"""
node_type = NodeType.value_of(node_type)
# return default block config
workflow_engine_manager = WorkflowEngineManager()
return workflow_engine_manager.get_default_config(node_type, filters)
def run_draft_workflow_node(self, app_model: App,
node_id: str,
user_inputs: dict,
account: Account) -> WorkflowNodeExecution:
"""
Run draft workflow node
"""
# fetch draft workflow by app_model
draft_workflow = self.get_draft_workflow(app_model=app_model)
if not draft_workflow:
raise ValueError('Workflow not initialized')
# run draft workflow node
workflow_engine_manager = WorkflowEngineManager()
start_at = time.perf_counter()
try:
node_instance, node_run_result = workflow_engine_manager.single_step_run_workflow_node(
workflow=draft_workflow,
node_id=node_id,
user_inputs=user_inputs,
user_id=account.id,
)
except WorkflowNodeRunFailedError as e:
workflow_node_execution = WorkflowNodeExecution(
tenant_id=app_model.tenant_id,
app_id=app_model.id,
workflow_id=draft_workflow.id,
triggered_from=WorkflowNodeExecutionTriggeredFrom.SINGLE_STEP.value,
index=1,
node_id=e.node_id,
node_type=e.node_type.value,
title=e.node_title,
status=WorkflowNodeExecutionStatus.FAILED.value,
error=e.error,
elapsed_time=time.perf_counter() - start_at,
created_by_role=CreatedByRole.ACCOUNT.value,
created_by=account.id,
created_at=datetime.now(timezone.utc).replace(tzinfo=None),
finished_at=datetime.now(timezone.utc).replace(tzinfo=None)
)
db.session.add(workflow_node_execution)
db.session.commit()
return workflow_node_execution
if node_run_result.status == WorkflowNodeExecutionStatus.SUCCEEDED:
# create workflow node execution
workflow_node_execution = WorkflowNodeExecution(
tenant_id=app_model.tenant_id,
app_id=app_model.id,
workflow_id=draft_workflow.id,
triggered_from=WorkflowNodeExecutionTriggeredFrom.SINGLE_STEP.value,
index=1,
node_id=node_id,
node_type=node_instance.node_type.value,
title=node_instance.node_data.title,
inputs=json.dumps(node_run_result.inputs) if node_run_result.inputs else None,
process_data=json.dumps(node_run_result.process_data) if node_run_result.process_data else None,
outputs=json.dumps(jsonable_encoder(node_run_result.outputs)) if node_run_result.outputs else None,
execution_metadata=(json.dumps(jsonable_encoder(node_run_result.metadata))
if node_run_result.metadata else None),
status=WorkflowNodeExecutionStatus.SUCCEEDED.value,
elapsed_time=time.perf_counter() - start_at,
created_by_role=CreatedByRole.ACCOUNT.value,
created_by=account.id,
created_at=datetime.now(timezone.utc).replace(tzinfo=None),
finished_at=datetime.now(timezone.utc).replace(tzinfo=None)
)
else:
# create workflow node execution
workflow_node_execution = WorkflowNodeExecution(
tenant_id=app_model.tenant_id,
app_id=app_model.id,
workflow_id=draft_workflow.id,
triggered_from=WorkflowNodeExecutionTriggeredFrom.SINGLE_STEP.value,
index=1,
node_id=node_id,
node_type=node_instance.node_type.value,
title=node_instance.node_data.title,
status=node_run_result.status.value,
error=node_run_result.error,
elapsed_time=time.perf_counter() - start_at,
created_by_role=CreatedByRole.ACCOUNT.value,
created_by=account.id,
created_at=datetime.now(timezone.utc).replace(tzinfo=None),
finished_at=datetime.now(timezone.utc).replace(tzinfo=None)
)
db.session.add(workflow_node_execution)
db.session.commit()
return workflow_node_execution
def convert_to_workflow(self, app_model: App, account: Account, args: dict) -> App:
"""
Basic mode of chatbot app(expert mode) to workflow
Completion App to Workflow App
:param app_model: App instance
:param account: Account instance
:param args: dict
:return:
"""
# chatbot convert to workflow mode
workflow_converter = WorkflowConverter()
if app_model.mode not in [AppMode.CHAT.value, AppMode.COMPLETION.value]:
raise ValueError(f'Current App mode: {app_model.mode} is not supported convert to workflow.')
# convert to workflow
new_app = workflow_converter.convert_to_workflow(
app_model=app_model,
account=account,
name=args.get('name'),
icon=args.get('icon'),
icon_background=args.get('icon_background'),
)
return new_app
def validate_features_structure(self, app_model: App, features: dict) -> dict:
if app_model.mode == AppMode.ADVANCED_CHAT.value:
return AdvancedChatAppConfigManager.config_validate(
tenant_id=app_model.tenant_id,
config=features,
only_structure_validate=True
)
elif app_model.mode == AppMode.WORKFLOW.value:
return WorkflowAppConfigManager.config_validate(
tenant_id=app_model.tenant_id,
config=features,
only_structure_validate=True
)
else:
raise ValueError(f"Invalid app mode: {app_model.mode}")
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