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path: root/pkg/aflow/func_action.go
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// Copyright 2025 syzkaller project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.

package aflow

import (
	"maps"
	"reflect"
	"testing"

	"github.com/google/syzkaller/pkg/aflow/trajectory"
	"github.com/stretchr/testify/require"
)

func NewFuncAction[Args, Results any](name string, fn func(*Context, Args) (Results, error)) Action {
	a := &funcAction[Args, Results]{
		name: name,
		fn:   fn,
	}
	registerMCPAction(a)
	return a
}

type funcAction[Args, Results any] struct {
	name string
	fn   func(*Context, Args) (Results, error)
}

func (a *funcAction[Args, Results]) execute(ctx *Context) error {
	args, err := convertFromMap[Args](ctx.state, false, false)
	if err != nil {
		return err
	}
	span := &trajectory.Span{
		Type: trajectory.SpanAction,
		Name: a.name,
	}
	if err := ctx.startSpan(span); err != nil {
		return err
	}
	res, fnErr := a.fn(ctx, args)
	span.Results = convertToMap(res)
	maps.Insert(ctx.state, maps.All(span.Results))
	return ctx.finishSpan(span, fnErr)
}

func (a *funcAction[Args, Results]) verify(ctx *verifyContext) {
	ctx.requireNotEmpty(a.name, "Name", a.name)
	requireInputs[Args](ctx, a.name)
	provideOutputs[Results](ctx, a.name)
}

func (a *funcAction[Args, Results]) testVerify(t *testing.T, ctx *verifyContext, args, results any) (
	map[string]any, map[string]any, func(map[string]any) map[string]any) {
	require.Equal(t, reflect.TypeFor[Args](), reflect.TypeOf(args))
	require.Equal(t, reflect.TypeFor[Results](), reflect.TypeOf(results))
	provideOutputs[Args](ctx, "args")
	a.verify(ctx)
	requireInputs[Results](ctx, "results")
	return convertToMap(args.(Args)), convertToMap(results.(Results)), extractOutputs[Results]
}