dify/api/services/plugin/plugin_parameter_service.py

from collections.abc import Mapping, Sequence
from typing import Any, Literal

from sqlalchemy.orm import Session

from core.plugin.entities.parameters import PluginParameterOption
from core.plugin.entities.plugin_daemon import CredentialType
from core.plugin.impl.dynamic_select import DynamicSelectClient
from core.tools.tool_manager import ToolManager
from core.tools.utils.encryption import create_tool_provider_encrypter
from core.trigger.entities.api_entities import TriggerProviderSubscriptionApiEntity
from core.trigger.entities.entities import SubscriptionBuilder
from extensions.ext_database import db
from models.tools import BuiltinToolProvider
from services.trigger.trigger_provider_service import TriggerProviderService
from services.trigger.trigger_subscription_builder_service import TriggerSubscriptionBuilderService


class PluginParameterService:
    @staticmethod
    def get_dynamic_select_options(
        tenant_id: str,
        user_id: str,
        plugin_id: str,
        provider: str,
        action: str,
        parameter: str,
        credential_id: str | None,
        provider_type: Literal["tool", "trigger"],
    ) -> Sequence[PluginParameterOption]:
        """
        Get dynamic select options for a plugin parameter.

        Args:
            tenant_id: The tenant ID.
            plugin_id: The plugin ID.
            provider: The provider name.
            action: The action name.
            parameter: The parameter name.
        """
        credentials: Mapping[str, Any] = {}
        credential_type: str = CredentialType.UNAUTHORIZED.value
        match provider_type:
            case "tool":
                provider_controller = ToolManager.get_builtin_provider(provider, tenant_id)
                # init tool configuration
                encrypter, _ = create_tool_provider_encrypter(
                    tenant_id=tenant_id,
                    controller=provider_controller,
                )

                # check if credentials are required
                if not provider_controller.need_credentials:
                    credentials = {}
                else:
                    # fetch credentials from db
                    with Session(db.engine) as session:
                        if credential_id:
                            db_record = (
                                session.query(BuiltinToolProvider)
                                .where(
                                    BuiltinToolProvider.tenant_id == tenant_id,
                                    BuiltinToolProvider.provider == provider,
                                    BuiltinToolProvider.id == credential_id,
                                )
                                .first()
                            )
                        else:
                            db_record = (
                                session.query(BuiltinToolProvider)
                                .where(
                                    BuiltinToolProvider.tenant_id == tenant_id,
                                    BuiltinToolProvider.provider == provider,
                                )
                                .order_by(BuiltinToolProvider.is_default.desc(), BuiltinToolProvider.created_at.asc())
                                .first()
                            )

                    if db_record is None:
                        raise ValueError(f"Builtin provider {provider} not found when fetching credentials")

                    credentials = encrypter.decrypt(db_record.credentials)
                    credential_type = db_record.credential_type
            case "trigger":
                subscription: TriggerProviderSubscriptionApiEntity | SubscriptionBuilder | None
                if credential_id:
                    subscription = TriggerSubscriptionBuilderService.get_subscription_builder(credential_id)
                    if not subscription:
                        trigger_subscription = TriggerProviderService.get_subscription_by_id(tenant_id, credential_id)
                        subscription = trigger_subscription.to_api_entity() if trigger_subscription else None
                else:
                    trigger_subscription = TriggerProviderService.get_subscription_by_id(tenant_id)
                    subscription = trigger_subscription.to_api_entity() if trigger_subscription else None

                if subscription is None:
                    raise ValueError(f"Subscription {credential_id} not found")

                credentials = subscription.credentials
                credential_type = subscription.credential_type or CredentialType.UNAUTHORIZED

        return (
            DynamicSelectClient()
            .fetch_dynamic_select_options(
                tenant_id, user_id, plugin_id, provider, action, credentials, credential_type, parameter
            )
            .options
        )