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Go

/*
* Copyright 2025 CloudWeGo 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 tool
import (
"context"
"fmt"
"github.com/cloudwego/eino/components/tool"
"github.com/cloudwego/eino/schema"
)
type ApprovalInfo struct {
ToolName string
ArgumentsInJSON string
}
type ApprovalResult struct {
Approved bool
DisapproveReason *string
}
func (ai *ApprovalInfo) String() string {
return fmt.Sprintf("tool '%s' interrupted with arguments '%s', waiting for your approval, "+
"please answer with Y/N",
ai.ToolName, ai.ArgumentsInJSON)
}
func init() {
schema.Register[*ApprovalInfo]()
}
type InvokableApprovableTool struct {
tool.InvokableTool
}
func (i InvokableApprovableTool) Info(ctx context.Context) (*schema.ToolInfo, error) {
return i.InvokableTool.Info(ctx)
}
func (i InvokableApprovableTool) InvokableRun(ctx context.Context, argumentsInJSON string,
opts ...tool.Option) (string, error) {
toolInfo, err := i.Info(ctx)
if err != nil {
return "", err
}
wasInterrupted, _, storedArguments := tool.GetInterruptState[string](ctx)
if !wasInterrupted {
return "", tool.StatefulInterrupt(ctx, &ApprovalInfo{
ToolName: toolInfo.Name,
ArgumentsInJSON: argumentsInJSON,
}, argumentsInJSON)
}
isResumeTarget, hasData, data := tool.GetResumeContext[*ApprovalResult](ctx)
if isResumeTarget && hasData {
if data.Approved {
return i.InvokableTool.InvokableRun(ctx, storedArguments, opts...)
}
if data.DisapproveReason != nil {
return fmt.Sprintf("tool '%s' disapproved, reason: %s", toolInfo.Name, *data.DisapproveReason), nil
}
return fmt.Sprintf("tool '%s' disapproved", toolInfo.Name), nil
}
isResumeTarget, _, _ = tool.GetResumeContext[any](ctx)
if !isResumeTarget {
return "", tool.StatefulInterrupt(ctx, &ApprovalInfo{
ToolName: toolInfo.Name,
ArgumentsInJSON: storedArguments,
}, storedArguments)
}
return i.InvokableTool.InvokableRun(ctx, storedArguments, opts...)
}