import logging
import httpx
import yaml # type: ignore
from core.app.segments import factory
from events.app_event import app_model_config_was_updated, app_was_created
from extensions.ext_database import db
from models.account import Account
from models.model import App, AppMode, AppModelConfig
from models.workflow import Workflow
from services.workflow_service import WorkflowService
logger = logging.getLogger(__name__)
current_dsl_version = "0.1.1"
dsl_to_dify_version_mapping: dict[str, str] = {
"0.1.1": "0.6.0", # dsl version -> from dify version
}
class AppDslService:
@classmethod
def import_and_create_new_app_from_url(cls, tenant_id: str, url: str, args: dict, account: Account) -> App:
"""
Import app dsl from url and create new app
:param tenant_id: tenant id
:param url: import url
:param args: request args
:param account: Account instance
"""
try:
max_size = 10 * 1024 * 1024 # 10MB
timeout = httpx.Timeout(10.0)
with httpx.stream("GET", url.strip(), follow_redirects=True, timeout=timeout) as response:
response.raise_for_status()
total_size = 0
content = b""
for chunk in response.iter_bytes():
total_size += len(chunk)
if total_size > max_size:
raise ValueError("File size exceeds the limit of 10MB")
content += chunk
except httpx.HTTPStatusError as http_err:
raise ValueError(f"HTTP error occurred: {http_err}")
except httpx.RequestError as req_err:
raise ValueError(f"Request error occurred: {req_err}")
except Exception as e:
raise ValueError(f"Failed to fetch DSL from URL: {e}")
if not content:
raise ValueError("Empty content from url")
try:
data = content.decode("utf-8")
except UnicodeDecodeError as e:
raise ValueError(f"Error decoding content: {e}")
return cls.import_and_create_new_app(tenant_id, data, args, account)
@classmethod
def import_and_create_new_app(cls, tenant_id: str, data: str, args: dict, account: Account) -> App:
"""
Import app dsl and create new app
:param tenant_id: tenant id
:param data: import data
:param args: request args
:param account: Account instance
"""
try:
import_data = yaml.safe_load(data)
except yaml.YAMLError:
raise ValueError("Invalid YAML format in data argument.")
# check or repair dsl version
import_data = cls._check_or_fix_dsl(import_data)
app_data = import_data.get("app")
if not app_data:
raise ValueError("Missing app in data argument")
# get app basic info
name = args.get("name") if args.get("name") else app_data.get("name")
description = args.get("description") if args.get("description") else app_data.get("description", "")
icon_type = args.get("icon_type") if args.get("icon_type") else app_data.get("icon_type")
icon = args.get("icon") if args.get("icon") else app_data.get("icon")
icon_background = (
args.get("icon_background") if args.get("icon_background") else app_data.get("icon_background")
)
use_icon_as_answer_icon = app_data.get("use_icon_as_answer_icon", False)
# import dsl and create app
app_mode = AppMode.value_of(app_data.get("mode"))
if app_mode in [AppMode.ADVANCED_CHAT, AppMode.WORKFLOW]:
app = cls._import_and_create_new_workflow_based_app(
tenant_id=tenant_id,
app_mode=app_mode,
workflow_data=import_data.get("workflow"),
account=account,
name=name,
description=description,
icon_type=icon_type,
icon=icon,
icon_background=icon_background,
use_icon_as_answer_icon=use_icon_as_answer_icon,
)
elif app_mode in [AppMode.CHAT, AppMode.AGENT_CHAT, AppMode.COMPLETION]:
app = cls._import_and_create_new_model_config_based_app(
tenant_id=tenant_id,
app_mode=app_mode,
model_config_data=import_data.get("model_config"),
account=account,
name=name,
description=description,
icon_type=icon_type,
icon=icon,
icon_background=icon_background,
use_icon_as_answer_icon=use_icon_as_answer_icon,
)
else:
raise ValueError("Invalid app mode")
return app
@classmethod
def import_and_overwrite_workflow(cls, app_model: App, data: str, account: Account) -> Workflow:
"""
Import app dsl and overwrite workflow
:param app_model: App instance
:param data: import data
:param account: Account instance
"""
try:
import_data = yaml.safe_load(data)
except yaml.YAMLError:
raise ValueError("Invalid YAML format in data argument.")
# check or repair dsl version
import_data = cls._check_or_fix_dsl(import_data)
app_data = import_data.get("app")
if not app_data:
raise ValueError("Missing app in data argument")
# import dsl and overwrite app
app_mode = AppMode.value_of(app_data.get("mode"))
if app_mode not in [AppMode.ADVANCED_CHAT, AppMode.WORKFLOW]:
raise ValueError("Only support import workflow in advanced-chat or workflow app.")
if app_data.get("mode") != app_model.mode:
raise ValueError(f"App mode {app_data.get('mode')} is not matched with current app mode {app_mode.value}")
return cls._import_and_overwrite_workflow_based_app(
app_model=app_model,
workflow_data=import_data.get("workflow"),
account=account,
)
@classmethod
def export_dsl(cls, app_model: App, include_secret: bool = False) -> str:
"""
Export app
:param app_model: App instance
:return:
"""
app_mode = AppMode.value_of(app_model.mode)
export_data = {
"version": current_dsl_version,
"kind": "app",
"app": {
"name": app_model.name,
"mode": app_model.mode,
"icon": "🤖" if app_model.icon_type == "image" else app_model.icon,
"icon_background": "#FFEAD5" if app_model.icon_type == "image" else app_model.icon_background,
"description": app_model.description,
"use_icon_as_answer_icon": app_model.use_icon_as_answer_icon,
},
}
if app_mode in [AppMode.ADVANCED_CHAT, AppMode.WORKFLOW]:
cls._append_workflow_export_data(
export_data=export_data, app_model=app_model, include_secret=include_secret
)
else:
cls._append_model_config_export_data(export_data, app_model)
return yaml.dump(export_data, allow_unicode=True)
@classmethod
def _check_or_fix_dsl(cls, import_data: dict) -> dict:
"""
Check or fix dsl
:param import_data: import data
"""
if not import_data.get("version"):
import_data["version"] = "0.1.0"
if not import_data.get("kind") or import_data.get("kind") != "app":
import_data["kind"] = "app"
if import_data.get("version") != current_dsl_version:
# Currently only one DSL version, so no difference checks or compatibility fixes will be performed.
logger.warning(
f"DSL version {import_data.get('version')} is not compatible "
f"with current version {current_dsl_version}, related to "
f"Dify version {dsl_to_dify_version_mapping.get(current_dsl_version)}."
)
return import_data
@classmethod
def _import_and_create_new_workflow_based_app(
cls,
tenant_id: str,
app_mode: AppMode,
workflow_data: dict,
account: Account,
name: str,
description: str,
icon_type: str,
icon: str,
icon_background: str,
use_icon_as_answer_icon: bool,
) -> App:
"""
Import app dsl and create new workflow based app
:param tenant_id: tenant id
:param app_mode: app mode
:param workflow_data: workflow data
:param account: Account instance
:param name: app name
:param description: app description
:param icon_type: app icon type, "emoji" or "image"
:param icon: app icon
:param icon_background: app icon background
:param use_icon_as_answer_icon: use app icon as answer icon
"""
if not workflow_data:
raise ValueError("Missing workflow in data argument " "when app mode is advanced-chat or workflow")
app = cls._create_app(
tenant_id=tenant_id,
app_mode=app_mode,
account=account,
name=name,
description=description,
icon_type=icon_type,
icon=icon,
icon_background=icon_background,
use_icon_as_answer_icon=use_icon_as_answer_icon,
)
# init draft workflow
environment_variables_list = workflow_data.get("environment_variables") or []
environment_variables = [factory.build_variable_from_mapping(obj) for obj in environment_variables_list]
conversation_variables_list = workflow_data.get("conversation_variables") or []
conversation_variables = [factory.build_variable_from_mapping(obj) for obj in conversation_variables_list]
workflow_service = WorkflowService()
draft_workflow = workflow_service.sync_draft_workflow(
app_model=app,
graph=workflow_data.get("graph", {}),
features=workflow_data.get("../core/app/features", {}),
unique_hash=None,
account=account,
environment_variables=environment_variables,
conversation_variables=conversation_variables,
)
workflow_service.publish_workflow(app_model=app, account=account, draft_workflow=draft_workflow)
return app
@classmethod
def _import_and_overwrite_workflow_based_app(
cls, app_model: App, workflow_data: dict, account: Account
) -> Workflow:
"""
Import app dsl and overwrite workflow based app
:param app_model: App instance
:param workflow_data: workflow data
:param account: Account instance
"""
if not workflow_data:
raise ValueError("Missing workflow in data argument " "when app mode is advanced-chat or workflow")
# fetch draft workflow by app_model
workflow_service = WorkflowService()
current_draft_workflow = workflow_service.get_draft_workflow(app_model=app_model)
if current_draft_workflow:
unique_hash = current_draft_workflow.unique_hash
else:
unique_hash = None
# sync draft workflow
environment_variables_list = workflow_data.get("environment_variables") or []
environment_variables = [factory.build_variable_from_mapping(obj) for obj in environment_variables_list]
conversation_variables_list = workflow_data.get("conversation_variables") or []
conversation_variables = [factory.build_variable_from_mapping(obj) for obj in conversation_variables_list]
draft_workflow = workflow_service.sync_draft_workflow(
app_model=app_model,
graph=workflow_data.get("graph", {}),
features=workflow_data.get("features", {}),
unique_hash=unique_hash,
account=account,
environment_variables=environment_variables,
conversation_variables=conversation_variables,
)
return draft_workflow
@classmethod
def _import_and_create_new_model_config_based_app(
cls,
tenant_id: str,
app_mode: AppMode,
model_config_data: dict,
account: Account,
name: str,
description: str,
icon_type: str,
icon: str,
icon_background: str,
use_icon_as_answer_icon: bool,
) -> App:
"""
Import app dsl and create new model config based app
:param tenant_id: tenant id
:param app_mode: app mode
:param model_config_data: model config data
:param account: Account instance
:param name: app name
:param description: app description
:param icon: app icon
:param icon_background: app icon background
"""
if not model_config_data:
raise ValueError("Missing model_config in data argument " "when app mode is chat, agent-chat or completion")
app = cls._create_app(
tenant_id=tenant_id,
app_mode=app_mode,
account=account,
name=name,
description=description,
icon_type=icon_type,
icon=icon,
icon_background=icon_background,
use_icon_as_answer_icon=use_icon_as_answer_icon,
)
app_model_config = AppModelConfig()
app_model_config = app_model_config.from_model_config_dict(model_config_data)
app_model_config.app_id = app.id
app_model_config.created_by = account.id
app_model_config.updated_by = account.id
db.session.add(app_model_config)
db.session.commit()
app.app_model_config_id = app_model_config.id
app_model_config_was_updated.send(app, app_model_config=app_model_config)
return app
@classmethod
def _create_app(
cls,
tenant_id: str,
app_mode: AppMode,
account: Account,
name: str,
description: str,
icon_type: str,
icon: str,
icon_background: str,
use_icon_as_answer_icon: bool,
) -> App:
"""
Create new app
:param tenant_id: tenant id
:param app_mode: app mode
:param account: Account instance
:param name: app name
:param description: app description
:param icon_type: app icon type, "emoji" or "image"
:param icon: app icon
:param icon_background: app icon background
:param use_icon_as_answer_icon: use app icon as answer icon
"""
app = App(
tenant_id=tenant_id,
mode=app_mode.value,
name=name,
description=description,
icon_type=icon_type,
icon=icon,
icon_background=icon_background,
enable_site=True,
enable_api=True,
use_icon_as_answer_icon=use_icon_as_answer_icon,
created_by=account.id,
updated_by=account.id,
)
db.session.add(app)
db.session.commit()
app_was_created.send(app, account=account)
return app
@classmethod
def _append_workflow_export_data(cls, *, export_data: dict, app_model: App, include_secret: bool) -> None:
"""
Append workflow export data
:param export_data: export data
:param app_model: App instance
"""
workflow_service = WorkflowService()
workflow = workflow_service.get_draft_workflow(app_model)
if not workflow:
raise ValueError("Missing draft workflow configuration, please check.")
export_data["workflow"] = workflow.to_dict(include_secret=include_secret)
@classmethod
def _append_model_config_export_data(cls, export_data: dict, app_model: App) -> None:
"""
Append model config export data
:param export_data: export data
:param app_model: App instance
"""
app_model_config = app_model.app_model_config
if not app_model_config:
raise ValueError("Missing app configuration, please check.")
export_data["model_config"] = app_model_config.to_dict()