feat: manually mirror opencoze's code from bytedance

Change-Id: I09a73aadda978ad9511264a756b2ce51f5761adf

backend/domain/workflow/crossdomain/variable/variable.go

@@ -0,0 +1,124 @@
+/*
+ * Copyright 2025 coze-dev Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package variable
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/cloudwego/eino/compose"
+
+	"github.com/coze-dev/coze-studio/backend/domain/workflow/entity/vo"
+)
+
+var variableHandlerSingleton *Handler
+
+func GetVariableHandler() *Handler {
+	return variableHandlerSingleton
+}
+func SetVariableHandler(handler *Handler) {
+	variableHandlerSingleton = handler
+}
+
+type Handler struct {
+	UserVarStore   Store
+	SystemVarStore Store
+	AppVarStore    Store
+}
+
+func (v *Handler) Get(ctx context.Context, t vo.GlobalVarType, path compose.FieldPath, opts ...OptionFn) (any, error) {
+	switch t {
+	case vo.GlobalUser:
+		return v.UserVarStore.Get(ctx, path, opts...)
+	case vo.GlobalSystem:
+		return v.SystemVarStore.Get(ctx, path, opts...)
+	case vo.GlobalAPP:
+		return v.AppVarStore.Get(ctx, path, opts...)
+	default:
+		return nil, fmt.Errorf("unknown variable type: %v", t)
+	}
+}
+
+func (v *Handler) Set(ctx context.Context, t vo.GlobalVarType, path compose.FieldPath, value any, opts ...OptionFn) error {
+	switch t {
+	case vo.GlobalUser:
+		return v.UserVarStore.Set(ctx, path, value, opts...)
+	case vo.GlobalSystem:
+		return v.SystemVarStore.Set(ctx, path, value, opts...)
+	case vo.GlobalAPP:
+		return v.AppVarStore.Set(ctx, path, value, opts...)
+	default:
+		return fmt.Errorf("unknown variable type: %v", t)
+	}
+}
+
+func (v *Handler) Init(ctx context.Context) context.Context {
+	if v.UserVarStore != nil {
+		v.UserVarStore.Init(ctx)
+	}
+
+	if v.SystemVarStore != nil {
+		v.SystemVarStore.Init(ctx)
+	}
+
+	if v.AppVarStore != nil {
+		v.AppVarStore.Init(ctx)
+	}
+
+	return ctx
+}
+
+type StoreInfo struct {
+	AppID        *int64
+	AgentID      *int64
+	ConnectorID  int64
+	ConnectorUID string
+}
+
+type StoreConfig struct {
+	StoreInfo StoreInfo
+}
+
+type OptionFn func(*StoreConfig)
+
+func WithStoreInfo(info StoreInfo) OptionFn {
+	return func(option *StoreConfig) {
+		option.StoreInfo = info
+	}
+}
+
+//go:generate mockgen -destination varmock/var_mock.go --package mockvar -source variable.go
+type Store interface {
+	Init(ctx context.Context)
+	Get(ctx context.Context, path compose.FieldPath, opts ...OptionFn) (any, error)
+	Set(ctx context.Context, path compose.FieldPath, value any, opts ...OptionFn) error
+}
+
+var variablesMetaGetterImpl VariablesMetaGetter
+
+func GetVariablesMetaGetter() VariablesMetaGetter {
+	return variablesMetaGetterImpl
+}
+
+func SetVariablesMetaGetter(v VariablesMetaGetter) {
+	variablesMetaGetterImpl = v
+}
+
+type VariablesMetaGetter interface {
+	GetAppVariablesMeta(ctx context.Context, id, version string) (m map[string]*vo.TypeInfo, err error)
+	GetAgentVariablesMeta(ctx context.Context, id int64, version string) (m map[string]*vo.TypeInfo, err error)
+}