package auth

import (
	"context"
	"encoding/json"
	"errors"
	"fmt"
	"github.com/redis/go-redis/v9"
	g "platform/web/globals"
)

func find(ctx context.Context, token string) (*Context, error) {

	// 读取认证数据
	authJSON, err := g.Redis.Get(ctx, accessKey(token)).Result()
	if err != nil {
		if errors.Is(err, redis.Nil) {
			return nil, errors.New("invalid_token")
		}
		return nil, err
	}

	// 反序列化
	auth := new(Context)
	if err := json.Unmarshal([]byte(authJSON), auth); err != nil {
		return nil, err
	}

	return auth, nil
}

func accessKey(token string) string {
	return fmt.Sprintf("session:%s", token)
}