2a96f4c6f9
后端： 1.阶段 6 agent / memory 服务化收口 - 新增 cmd/agent 独立进程入口，承载 agent zrpc server、agent outbox relay / consumer 和运行时依赖初始化 - 补齐 services/agent/rpc 的 Chat stream 与 conversation meta/list/timeline、schedule-preview、context-stats、schedule-state unary RPC - 新增 gateway/client/agent 与 shared/contracts/agent，将 /api/v1/agent chat 和非 chat 门面切到 agent zrpc - 收缩 gateway 本地 AgentService 装配，双 RPC 开关开启时不再初始化本地 agent 编排、LLM、RAG 和 memory reader fallback - 将 backend/memory 物理迁入 services/memory，私有实现收入 internal，保留 module/model/observe 作为 memory 服务门面 - 调整 memory outbox、memory reader 和 agent 记忆渲染链路的 import 与服务边界，cmd/memory 独占 memory worker / consumer - 关闭 gateway 侧 agent outbox worker 所有权，agent relay / consumer 由 cmd/agent 独占，gateway 仅保留 HTTP/SSE 门面与迁移期开关回退 - 更新阶段 6 文档，记录 agent / memory 当前切流点、smoke 结果，以及 backend/client 与 gateway/shared 的目录收口口径
844 lines
25 KiB
Go
844 lines
25 KiB
Go
package api
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import (
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"context"
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"encoding/json"
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"errors"
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"io"
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"net/http"
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"strconv"
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"strings"
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"sync"
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"time"
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gatewayagent "github.com/LoveLosita/smartflow/backend/gateway/client/agent"
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"github.com/LoveLosita/smartflow/backend/model"
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"github.com/LoveLosita/smartflow/backend/respond"
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agentsv "github.com/LoveLosita/smartflow/backend/services/agent/sv"
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agentcontracts "github.com/LoveLosita/smartflow/backend/shared/contracts/agent"
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"github.com/gin-gonic/gin"
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"github.com/google/uuid"
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"github.com/spf13/viper"
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"gorm.io/gorm"
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)
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const (
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agentChatHeartbeatInterval = 5 * time.Second
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agentRPCChatEnabledKey = "agent.rpc.chat.enabled"
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agentRPCAPIEnabledKey = "agent.rpc.api.enabled"
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)
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type AgentHandler struct {
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svc *agentsv.AgentService
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rpcClient *gatewayagent.Client
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rpcClientMu sync.Mutex
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}
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// NewAgentHandler 组装 AgentHandler。
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func NewAgentHandler(svc *agentsv.AgentService) *AgentHandler {
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return &AgentHandler{
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svc: svc,
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}
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}
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// NewAgentHandlerWithRPC 组装带 agent RPC stream 适配能力的 AgentHandler。
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//
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// 职责边界：
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// 1. HTTP / SSE 协议仍由 Gateway 持有；
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// 2. agent RPC 作为 chat stream 与非 chat /agent/* 查询/命令的服务间通道；
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// 3. svc 只用于 RPC 开关关闭时的迁移期 fallback，当前默认可为 nil；
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// 4. rpcClient 为空时允许按配置懒加载，避免测试和旧装配必须提前构造 client。
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func NewAgentHandlerWithRPC(svc *agentsv.AgentService, rpcClient *gatewayagent.Client) *AgentHandler {
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return &AgentHandler{
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svc: svc,
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rpcClient: rpcClient,
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}
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}
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func writeSSEData(w io.Writer, payload string) error {
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_, err := io.WriteString(w, "data: "+payload+"\n\n")
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return err
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}
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// mapResumeConfirmAction 把 extra.resume.action 映射为现有 confirm_action 口径。
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//
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// 映射规则：
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// 1. approve -> accept（确认执行）；
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// 2. reject/cancel -> reject（拒绝执行）；
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// 3. 兜底走 reject，避免脏值误触发执行。
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func mapResumeConfirmAction(action model.AgentResumeAction) string {
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switch action {
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case model.AgentResumeActionApprove:
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return "accept"
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case model.AgentResumeActionReject, model.AgentResumeActionCancel:
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return "reject"
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default:
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return "reject"
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}
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}
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type agentChatStreamEvent struct {
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payload string
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done bool
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errorJSON json.RawMessage
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err error
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}
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func (api *AgentHandler) ChatAgent(c *gin.Context) {
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// 1) 设置 SSE 响应头
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c.Writer.Header().Set("Content-Type", "text/event-stream")
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c.Writer.Header().Set("Cache-Control", "no-cache")
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c.Writer.Header().Set("Connection", "keep-alive")
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c.Writer.Header().Set("Transfer-Encoding", "chunked")
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c.Writer.Header().Set("X-Accel-Buffering", "no")
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// 2) 解析请求体
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var req model.UserSendMessageRequest
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if err := c.ShouldBindJSON(&req); err != nil {
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c.JSON(http.StatusBadRequest, respond.WrongParamType)
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return
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}
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// 2.1 兼容新恢复协议：把 extra.resume 统一映射到现有内部字段。
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// 1. 前端新协议只传 resume，不再直接传 confirm_action；
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// 2. 后端这里做一次入口归一，保证下游状态机继续按既有字段消费；
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// 3. 解析失败直接返回 400，避免把非法恢复请求当普通消息继续执行。
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resumeReq, resumeErr := req.ResumeRequest()
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if resumeErr != nil {
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c.JSON(http.StatusBadRequest, respond.WrongParamType)
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return
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}
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if resumeReq != nil {
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if req.Extra == nil {
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req.Extra = make(map[string]any)
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}
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req.Extra["resume_interaction_id"] = resumeReq.InteractionID
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if resumeReq.IsConfirmResume() {
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req.Extra["confirm_action"] = mapResumeConfirmAction(resumeReq.Action)
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}
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}
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// 3) 规范化会话 ID
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conversationID := strings.TrimSpace(req.ConversationID)
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if conversationID == "" {
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// 恢复类请求必须关联既有会话状态，缺少 conversation_id 直接报错。
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if resumeReq != nil {
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c.JSON(http.StatusBadRequest, respond.MissingConversationID)
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return
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}
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// 兼容旧协议：confirm_action 也必须绑定已有会话。
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if _, ok := req.Extra["confirm_action"]; ok {
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c.JSON(http.StatusBadRequest, respond.MissingConversationID)
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return
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}
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conversationID = uuid.NewString()
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}
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c.Writer.Header().Set("X-Conversation-ID", conversationID)
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userID := c.GetInt("user_id")
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if api.useAgentRPCChat() {
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api.streamAgentChatByRPC(c, req, userID, conversationID)
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return
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}
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if api.svc == nil {
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writeAgentSSEError(c.Writer, errors.New("agent local fallback is disabled"))
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flushSSEWriter(c.Writer)
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return
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}
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outChan, errChan := api.svc.AgentChat(c.Request.Context(), req.Message, req.Thinking, req.Model, userID, conversationID, req.Extra)
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// 4) 转发 SSE 流
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// 4.0 心跳保活：LLM thinking 静默期可达 10+ 秒，Vite dev proxy 会判 idle 切断连接。
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// 每 5 秒发送 SSE 标准注释行 ": ping\n\n"，前端 JSON.parse 失败后丢弃，不污染 UI。
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heartbeat := time.NewTicker(5 * time.Second)
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defer heartbeat.Stop()
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c.Stream(func(w io.Writer) bool {
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select {
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case err, ok := <-errChan:
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if ok && err != nil {
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writeAgentSSEError(w, err)
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}
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return false
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case msg, ok := <-outChan:
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if !ok {
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return false
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}
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if err := writeSSEData(w, msg); err != nil {
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return false
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}
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return true
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case <-c.Request.Context().Done():
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return false
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// 心跳分支：LLM thinking 静默期每 5 秒推送 SSE 注释行，防止代理判 idle 断连。
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case <-heartbeat.C:
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io.WriteString(w, ": ping\n\n")
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c.Writer.(http.Flusher).Flush()
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return true
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}
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})
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}
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func (api *AgentHandler) useAgentRPCChat() bool {
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return api != nil && viper.GetBool(agentRPCChatEnabledKey)
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}
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func (api *AgentHandler) useAgentRPCAPI() bool {
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return api != nil && viper.GetBool(agentRPCAPIEnabledKey)
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}
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// streamAgentChatByRPC 把 agent RPC server-stream 平滑转成前端既有 SSE。
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//
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// 职责边界：
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// 1. Gateway 继续负责 SSE header、心跳和 data 帧写出；
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// 2. agent RPC 只负责服务间 chunk stream，不暴露 Go channel 给跨进程调用方；
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// 3. RPC 建流失败或服务端 error_json 仍按现有 SSE 错误体输出，再追加 [DONE]。
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func (api *AgentHandler) streamAgentChatByRPC(c *gin.Context, req model.UserSendMessageRequest, userID int, conversationID string) {
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client, err := api.getAgentRPCClient()
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if err != nil {
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writeAgentSSEError(c.Writer, err)
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flushSSEWriter(c.Writer)
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return
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}
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extraJSON, err := json.Marshal(req.Extra)
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if err != nil {
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writeAgentSSEError(c.Writer, err)
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flushSSEWriter(c.Writer)
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return
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}
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stream, err := client.Chat(c.Request.Context(), agentcontracts.ChatRequest{
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Message: req.Message,
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Thinking: req.Thinking,
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Model: req.Model,
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UserID: userID,
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ConversationID: conversationID,
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ExtraJSON: extraJSON,
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})
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if err != nil {
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writeAgentSSEError(c.Writer, err)
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flushSSEWriter(c.Writer)
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return
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}
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recvCh := make(chan agentChatStreamEvent, 1)
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requestCtx := c.Request.Context()
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go func() {
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defer close(recvCh)
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sendEvent := func(event agentChatStreamEvent) bool {
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select {
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case recvCh <- event:
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return true
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case <-requestCtx.Done():
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return false
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}
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}
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for {
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chunk, recvErr := stream.Recv()
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if recvErr != nil {
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if errors.Is(recvErr, io.EOF) {
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return
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}
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sendEvent(agentChatStreamEvent{err: recvErr})
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return
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}
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if !sendEvent(agentChatStreamEvent{
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payload: chunk.Payload,
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done: chunk.Done,
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errorJSON: append(json.RawMessage(nil), chunk.ErrorJSON...),
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}) {
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return
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}
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if chunk.Done || len(chunk.ErrorJSON) > 0 {
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return
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}
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}
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}()
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heartbeat := time.NewTicker(agentChatHeartbeatInterval)
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defer heartbeat.Stop()
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c.Stream(func(w io.Writer) bool {
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select {
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case event, ok := <-recvCh:
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if !ok {
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return false
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}
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if event.err != nil {
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writeAgentSSEError(w, event.err)
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return false
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}
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if event.payload != "" {
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if err := writeSSEData(w, event.payload); err != nil {
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return false
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}
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}
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if len(event.errorJSON) > 0 {
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_ = writeSSEData(w, string(normalizeAgentRPCErrorJSON(event.errorJSON)))
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_ = writeSSEData(w, "[DONE]")
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return false
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}
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if event.done {
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_ = writeSSEData(w, "[DONE]")
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return false
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}
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return true
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case <-c.Request.Context().Done():
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return false
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case <-heartbeat.C:
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_, _ = io.WriteString(w, ": ping\n\n")
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flushSSEWriter(c.Writer)
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return true
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}
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})
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}
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func writeAgentSSEError(w io.Writer, err error) {
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if err == nil {
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return
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}
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_ = writeSSEData(w, string(buildAgentErrorEnvelopeJSON(errorCodeFromError(err), err.Error(), "server_error")))
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_ = writeSSEData(w, "[DONE]")
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}
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func (api *AgentHandler) getAgentRPCClient() (*gatewayagent.Client, error) {
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if api == nil {
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return nil, errors.New("agent handler is not initialized")
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}
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api.rpcClientMu.Lock()
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defer api.rpcClientMu.Unlock()
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if api.rpcClient != nil {
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return api.rpcClient, nil
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}
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client, err := gatewayagent.NewClient(gatewayagent.ClientConfig{
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Endpoints: viper.GetStringSlice("agent.rpc.endpoints"),
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Target: viper.GetString("agent.rpc.target"),
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Timeout: viper.GetDuration("agent.rpc.timeout"),
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})
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if err != nil {
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return nil, err
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}
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api.rpcClient = client
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return api.rpcClient, nil
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}
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func normalizeAgentRPCErrorJSON(raw json.RawMessage) json.RawMessage {
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trimmed := strings.TrimSpace(string(raw))
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if trimmed == "" {
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return buildAgentErrorEnvelopeJSON("", "agent rpc service returned empty error payload", "server_error")
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}
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var payload map[string]any
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if err := json.Unmarshal([]byte(trimmed), &payload); err != nil {
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return buildAgentErrorEnvelopeJSON("", trimmed, "server_error")
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}
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if nested, ok := payload["error"].(map[string]any); ok {
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return buildAgentErrorEnvelopeJSON(
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firstNonEmptyString(stringFromAny(nested["code"]), stringFromAny(nested["status"])),
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firstNonEmptyString(stringFromAny(nested["message"]), stringFromAny(nested["info"]), "agent rpc service returned error"),
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firstNonEmptyString(stringFromAny(nested["type"]), "server_error"),
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)
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}
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return buildAgentErrorEnvelopeJSON(
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firstNonEmptyString(stringFromAny(payload["code"]), stringFromAny(payload["status"])),
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firstNonEmptyString(stringFromAny(payload["message"]), stringFromAny(payload["info"]), trimmed),
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firstNonEmptyString(stringFromAny(payload["type"]), "server_error"),
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)
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}
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func buildAgentErrorEnvelopeJSON(code string, message string, errorType string) json.RawMessage {
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errorBody := map[string]any{
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"message": strings.TrimSpace(message),
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"type": strings.TrimSpace(errorType),
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}
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if errorBody["message"] == "" {
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errorBody["message"] = "agent stream error"
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}
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if errorBody["type"] == "" {
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errorBody["type"] = "server_error"
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}
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if trimmedCode := strings.TrimSpace(code); trimmedCode != "" {
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errorBody["code"] = trimmedCode
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}
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payload, err := json.Marshal(map[string]any{"error": errorBody})
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if err != nil {
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return json.RawMessage(`{"error":{"message":"agent stream error","type":"server_error"}}`)
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}
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return payload
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}
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func errorCodeFromError(err error) string {
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var respErr respond.Response
|
||
if errors.As(err, &respErr) {
|
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return strings.TrimSpace(respErr.Status)
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}
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return ""
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||
}
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func stringFromAny(value any) string {
|
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switch typed := value.(type) {
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||
case string:
|
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return strings.TrimSpace(typed)
|
||
case json.Number:
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||
return strings.TrimSpace(typed.String())
|
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case float64:
|
||
return strings.TrimSpace(strconv.FormatFloat(typed, 'f', -1, 64))
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case float32:
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||
return strings.TrimSpace(strconv.FormatFloat(float64(typed), 'f', -1, 32))
|
||
case int:
|
||
return strconv.Itoa(typed)
|
||
case int32:
|
||
return strconv.FormatInt(int64(typed), 10)
|
||
case int64:
|
||
return strconv.FormatInt(typed, 10)
|
||
case uint:
|
||
return strconv.FormatUint(uint64(typed), 10)
|
||
case uint32:
|
||
return strconv.FormatUint(uint64(typed), 10)
|
||
case uint64:
|
||
return strconv.FormatUint(typed, 10)
|
||
default:
|
||
return ""
|
||
}
|
||
}
|
||
|
||
func firstNonEmptyString(values ...string) string {
|
||
for _, value := range values {
|
||
if trimmed := strings.TrimSpace(value); trimmed != "" {
|
||
return trimmed
|
||
}
|
||
}
|
||
return ""
|
||
}
|
||
|
||
func flushSSEWriter(w io.Writer) {
|
||
if flusher, ok := w.(http.Flusher); ok {
|
||
flusher.Flush()
|
||
}
|
||
}
|
||
|
||
func writeAgentHTTPError(c *gin.Context, err error) {
|
||
if err == nil {
|
||
return
|
||
}
|
||
var respErr respond.Response
|
||
if errors.As(err, &respErr) && respErr.Status == respond.ConversationNotFound.Status {
|
||
c.JSON(http.StatusNotFound, respErr)
|
||
return
|
||
}
|
||
respond.DealWithError(c, err)
|
||
}
|
||
|
||
// GetConversationMeta 返回单个会话的元信息（标题、消息数、最近消息时间等）。
|
||
// 设计说明：
|
||
// 1) 该接口用于配合 SSE 聊天链路：标题异步生成后，前端可通过 conversation_id 拉取；
|
||
// 2) 不依赖 SSE header 动态更新，避免“header 必须首包前写入”的协议限制；
|
||
// 3) 会话不存在或不属于当前用户时返回 404，避免前端把无效会话误判成参数类型错误。
|
||
func (api *AgentHandler) GetConversationMeta(c *gin.Context) {
|
||
// 1. 读取 query 参数并做基础校验。
|
||
conversationID := strings.TrimSpace(c.Query("conversation_id"))
|
||
if conversationID == "" {
|
||
c.JSON(http.StatusBadRequest, respond.MissingParam)
|
||
return
|
||
}
|
||
|
||
// 2. 统一透传 user_id，避免越权读取他人会话。
|
||
userID := c.GetInt("user_id")
|
||
|
||
// 3. 设置短超时，避免该查询接口被慢查询长时间占用。
|
||
ctx, cancel := context.WithTimeout(c.Request.Context(), 1*time.Second)
|
||
defer cancel()
|
||
|
||
if api.useAgentRPCAPI() {
|
||
client, err := api.getAgentRPCClient()
|
||
if err != nil {
|
||
writeAgentHTTPError(c, err)
|
||
return
|
||
}
|
||
meta, err := client.GetConversationMeta(ctx, agentcontracts.ConversationQueryRequest{
|
||
UserID: userID,
|
||
ConversationID: conversationID,
|
||
})
|
||
if err != nil {
|
||
writeAgentHTTPError(c, err)
|
||
return
|
||
}
|
||
c.JSON(http.StatusOK, respond.RespWithData(respond.Ok, meta))
|
||
return
|
||
}
|
||
|
||
localSvc, ok := api.localAgentService(c)
|
||
if !ok {
|
||
return
|
||
}
|
||
|
||
// 4. 调 service 查询会话元信息。
|
||
meta, err := localSvc.GetConversationMeta(ctx, userID, conversationID)
|
||
if err != nil {
|
||
// 会话不存在或越权访问时返回 404，让前端能和“参数格式错误”区分开。
|
||
if errors.Is(err, gorm.ErrRecordNotFound) {
|
||
c.JSON(http.StatusNotFound, respond.ConversationNotFound)
|
||
return
|
||
}
|
||
respond.DealWithError(c, err)
|
||
return
|
||
}
|
||
|
||
// 5. 返回统一响应结构。
|
||
c.JSON(http.StatusOK, respond.RespWithData(respond.Ok, meta))
|
||
}
|
||
|
||
// GetConversationList 返回当前登录用户的会话列表（分页）。
|
||
//
|
||
// 设计说明：
|
||
// 1) 接口只返回“列表元信息”，不返回消息正文，避免列表接口过重；
|
||
// 2) page/page_size 为可选参数，缺省值由 service 层统一兜底；
|
||
// 3) status 可选，支持 active/archived，非法值直接返回 400。
|
||
func (api *AgentHandler) GetConversationList(c *gin.Context) {
|
||
// 1. 从 JWT 上下文读取 user_id，保证只查“当前用户自己的会话”。
|
||
userID := c.GetInt("user_id")
|
||
|
||
// 2. 解析分页参数（可选）：
|
||
// 2.1 参数不存在时保持 0，让 service 使用默认值；
|
||
// 2.2 参数存在但格式非法时直接返回 400，避免脏参数下沉。
|
||
page := 0
|
||
if rawPage := strings.TrimSpace(c.Query("page")); rawPage != "" {
|
||
parsedPage, err := strconv.Atoi(rawPage)
|
||
if err != nil {
|
||
c.JSON(http.StatusBadRequest, respond.WrongParamType)
|
||
return
|
||
}
|
||
page = parsedPage
|
||
}
|
||
|
||
pageSize := 0
|
||
if rawPageSize := strings.TrimSpace(c.Query("page_size")); rawPageSize != "" {
|
||
parsedPageSize, err := strconv.Atoi(rawPageSize)
|
||
if err != nil {
|
||
c.JSON(http.StatusBadRequest, respond.WrongParamType)
|
||
return
|
||
}
|
||
pageSize = parsedPageSize
|
||
}
|
||
|
||
// 2.3 limit 是 page_size 的懒加载别名：
|
||
// 2.3.1 前端若显式传 limit，则以 limit 为准，避免前端再做字段转换；
|
||
// 2.3.2 若 limit 非法同样直接返回 400，避免把脏参数下沉到 service；
|
||
// 2.3.3 若未传 limit，则继续沿用历史 page_size 行为，保持老前端兼容。
|
||
if rawLimit := strings.TrimSpace(c.Query("limit")); rawLimit != "" {
|
||
parsedLimit, err := strconv.Atoi(rawLimit)
|
||
if err != nil {
|
||
c.JSON(http.StatusBadRequest, respond.WrongParamType)
|
||
return
|
||
}
|
||
pageSize = parsedLimit
|
||
}
|
||
|
||
// 3. status 过滤器可选，最终合法性由 service 层统一校验。
|
||
status := strings.TrimSpace(c.Query("status"))
|
||
|
||
// 4. 读接口设置短超时，避免慢查询占用连接。
|
||
ctx, cancel := context.WithTimeout(c.Request.Context(), 1*time.Second)
|
||
defer cancel()
|
||
|
||
if api.useAgentRPCAPI() {
|
||
client, err := api.getAgentRPCClient()
|
||
if err != nil {
|
||
writeAgentHTTPError(c, err)
|
||
return
|
||
}
|
||
resp, err := client.GetConversationList(ctx, agentcontracts.ConversationListRequest{
|
||
UserID: userID,
|
||
Page: page,
|
||
PageSize: pageSize,
|
||
Status: status,
|
||
})
|
||
if err != nil {
|
||
writeAgentHTTPError(c, err)
|
||
return
|
||
}
|
||
c.JSON(http.StatusOK, respond.RespWithData(respond.Ok, resp))
|
||
return
|
||
}
|
||
|
||
localSvc, ok := api.localAgentService(c)
|
||
if !ok {
|
||
return
|
||
}
|
||
|
||
// 5. 调 service 查询并返回统一响应结构。
|
||
resp, err := localSvc.GetConversationList(ctx, userID, page, pageSize, status)
|
||
if err != nil {
|
||
respond.DealWithError(c, err)
|
||
return
|
||
}
|
||
c.JSON(http.StatusOK, respond.RespWithData(respond.Ok, resp))
|
||
}
|
||
|
||
// GetConversationTimeline 返回指定会话的统一时间线（正文+卡片）。
|
||
//
|
||
// 说明：
|
||
// 1. 该接口是新前端刷新重建的单一来源；
|
||
// 2. 返回结果已按 seq 升序，前端按数组顺序渲染即可；
|
||
// 3. 会话不存在或不属于当前用户时统一返回 404，避免误判成参数格式问题。
|
||
func (api *AgentHandler) GetConversationTimeline(c *gin.Context) {
|
||
conversationID := strings.TrimSpace(c.Query("conversation_id"))
|
||
if conversationID == "" {
|
||
c.JSON(http.StatusBadRequest, respond.MissingParam)
|
||
return
|
||
}
|
||
|
||
userID := c.GetInt("user_id")
|
||
|
||
ctx, cancel := context.WithTimeout(c.Request.Context(), 2*time.Second)
|
||
defer cancel()
|
||
|
||
if api.useAgentRPCAPI() {
|
||
client, err := api.getAgentRPCClient()
|
||
if err != nil {
|
||
writeAgentHTTPError(c, err)
|
||
return
|
||
}
|
||
timeline, err := client.GetConversationTimeline(ctx, agentcontracts.ConversationQueryRequest{
|
||
UserID: userID,
|
||
ConversationID: conversationID,
|
||
})
|
||
if err != nil {
|
||
writeAgentHTTPError(c, err)
|
||
return
|
||
}
|
||
c.JSON(http.StatusOK, respond.RespWithData(respond.Ok, timeline))
|
||
return
|
||
}
|
||
|
||
localSvc, ok := api.localAgentService(c)
|
||
if !ok {
|
||
return
|
||
}
|
||
|
||
timeline, err := localSvc.GetConversationTimeline(ctx, userID, conversationID)
|
||
if err != nil {
|
||
if errors.Is(err, gorm.ErrRecordNotFound) {
|
||
c.JSON(http.StatusNotFound, respond.ConversationNotFound)
|
||
return
|
||
}
|
||
respond.DealWithError(c, err)
|
||
return
|
||
}
|
||
|
||
c.JSON(http.StatusOK, respond.RespWithData(respond.Ok, timeline))
|
||
}
|
||
|
||
// GetSchedulePlanPreview 返回“指定会话”的排程结构化预览。
|
||
//
|
||
// 设计说明：
|
||
// 1) 该接口只读 Redis 预览快照，不修改聊天主链路协议；
|
||
// 2) 按 conversation_id + user_id 读取，避免跨用户越权访问；
|
||
// 3) 预览受 TTL 影响，若不存在会返回业务错误码。
|
||
func (api *AgentHandler) GetSchedulePlanPreview(c *gin.Context) {
|
||
// 1. 参数校验：conversation_id 必填。
|
||
conversationID := strings.TrimSpace(c.Query("conversation_id"))
|
||
if conversationID == "" {
|
||
c.JSON(http.StatusBadRequest, respond.MissingParam)
|
||
return
|
||
}
|
||
|
||
// 2. 从鉴权上下文取当前用户 ID，保证查询范围只在“本人会话”内。
|
||
userID := c.GetInt("user_id")
|
||
|
||
// 3. 设置短超时，防止缓存抖动时占用连接过久。
|
||
ctx, cancel := context.WithTimeout(c.Request.Context(), 1*time.Second)
|
||
defer cancel()
|
||
|
||
if api.useAgentRPCAPI() {
|
||
client, err := api.getAgentRPCClient()
|
||
if err != nil {
|
||
writeAgentHTTPError(c, err)
|
||
return
|
||
}
|
||
preview, err := client.GetSchedulePlanPreview(ctx, agentcontracts.ConversationQueryRequest{
|
||
UserID: userID,
|
||
ConversationID: conversationID,
|
||
})
|
||
if err != nil {
|
||
writeAgentHTTPError(c, err)
|
||
return
|
||
}
|
||
c.JSON(http.StatusOK, respond.RespWithData(respond.Ok, preview))
|
||
return
|
||
}
|
||
|
||
localSvc, ok := api.localAgentService(c)
|
||
if !ok {
|
||
return
|
||
}
|
||
|
||
// 4. 调 service 查询并返回统一响应结构。
|
||
preview, err := localSvc.GetSchedulePlanPreview(ctx, userID, conversationID)
|
||
if err != nil {
|
||
respond.DealWithError(c, err)
|
||
return
|
||
}
|
||
c.JSON(http.StatusOK, respond.RespWithData(respond.Ok, preview))
|
||
}
|
||
|
||
// GetContextStats 获取指定会话的上下文窗口 token 分布统计。
|
||
func (api *AgentHandler) GetContextStats(c *gin.Context) {
|
||
conversationID := strings.TrimSpace(c.Query("conversation_id"))
|
||
if conversationID == "" {
|
||
c.JSON(http.StatusBadRequest, respond.MissingParam)
|
||
return
|
||
}
|
||
|
||
userID := c.GetInt("user_id")
|
||
|
||
ctx, cancel := context.WithTimeout(c.Request.Context(), 1*time.Second)
|
||
defer cancel()
|
||
|
||
if api.useAgentRPCAPI() {
|
||
client, err := api.getAgentRPCClient()
|
||
if err != nil {
|
||
writeAgentHTTPError(c, err)
|
||
return
|
||
}
|
||
statsJSON, err := client.GetContextStats(ctx, agentcontracts.ConversationQueryRequest{
|
||
UserID: userID,
|
||
ConversationID: conversationID,
|
||
})
|
||
if err != nil {
|
||
writeAgentHTTPError(c, err)
|
||
return
|
||
}
|
||
if strings.TrimSpace(statsJSON) == "" {
|
||
statsJSON = "null"
|
||
}
|
||
var raw json.RawMessage = json.RawMessage(statsJSON)
|
||
c.JSON(http.StatusOK, respond.RespWithData(respond.Ok, raw))
|
||
return
|
||
}
|
||
|
||
localSvc, ok := api.localAgentService(c)
|
||
if !ok {
|
||
return
|
||
}
|
||
|
||
statsJSON, err := localSvc.GetContextStats(ctx, userID, conversationID)
|
||
if err != nil {
|
||
respond.DealWithError(c, err)
|
||
return
|
||
}
|
||
|
||
// 直接透传 JSON 字符串，避免二次序列化。
|
||
// 当会话尚未产生 compaction 统计时，LoadContextTokenStats 返回空字符串，
|
||
// 此时 json.RawMessage("") 在 MarshalJSON 时会报 "unexpected end of JSON input"，
|
||
// 所以空值时需要替换为 "null"，保证序列化安全。
|
||
if strings.TrimSpace(statsJSON) == "" {
|
||
statsJSON = "null"
|
||
}
|
||
var raw json.RawMessage = json.RawMessage(statsJSON)
|
||
c.JSON(http.StatusOK, respond.RespWithData(respond.Ok, raw))
|
||
}
|
||
|
||
// SaveScheduleState 前端暂存日程调整到 Redis 快照。
|
||
//
|
||
// 设计说明：
|
||
// 1. 前端在 confirm 卡片上拖拽调整任务位置后，调用此接口以绝对时间格式提交放置项；
|
||
// 2. 后端将绝对坐标转换为 ScheduleState 内部的相对 day_index，只修改 task_item，不动课程；
|
||
// 3. 不触发 LLM 调用、不写 MySQL、不刷新预览缓存。
|
||
//
|
||
// 降级策略：
|
||
// 1. 快照不存在（TTL 过期或会话未进入排程）返回 400，让前端提示用户重新对话；
|
||
// 2. 坐标越界、task_item_id 不存在等校验错误统一返回 400。
|
||
func (api *AgentHandler) SaveScheduleState(c *gin.Context) {
|
||
// 1. 解析请求体。
|
||
var req model.SaveScheduleStateRequest
|
||
if err := c.ShouldBindJSON(&req); err != nil {
|
||
c.JSON(http.StatusBadRequest, respond.WrongParamType)
|
||
return
|
||
}
|
||
|
||
// 2. 校验 conversation_id。
|
||
conversationID := strings.TrimSpace(req.ConversationID)
|
||
if conversationID == "" {
|
||
c.JSON(http.StatusBadRequest, respond.MissingParam)
|
||
return
|
||
}
|
||
|
||
// 3. 从鉴权上下文取当前用户 ID。
|
||
userID := c.GetInt("user_id")
|
||
|
||
// 4. 设置短超时，防止快照读写阻塞过久。
|
||
ctx, cancel := context.WithTimeout(c.Request.Context(), 3*time.Second)
|
||
defer cancel()
|
||
|
||
if api.useAgentRPCAPI() {
|
||
client, err := api.getAgentRPCClient()
|
||
if err != nil {
|
||
writeAgentHTTPError(c, err)
|
||
return
|
||
}
|
||
if err := client.SaveScheduleState(ctx, agentcontracts.SaveScheduleStateRequest{
|
||
UserID: userID,
|
||
ConversationID: conversationID,
|
||
Items: toAgentContractScheduleStateItems(req.Items),
|
||
}); err != nil {
|
||
writeAgentHTTPError(c, err)
|
||
return
|
||
}
|
||
c.JSON(http.StatusOK, respond.RespWithData(respond.Ok, nil))
|
||
return
|
||
}
|
||
|
||
localSvc, ok := api.localAgentService(c)
|
||
if !ok {
|
||
return
|
||
}
|
||
|
||
// 5. 调用 service 层执行 Load → 应用放置项 → Save。
|
||
if err := localSvc.SaveScheduleState(ctx, userID, conversationID, req.Items); err != nil {
|
||
respond.DealWithError(c, err)
|
||
return
|
||
}
|
||
c.JSON(http.StatusOK, respond.RespWithData(respond.Ok, nil))
|
||
}
|
||
|
||
// localAgentService 返回迁移期本地 fallback 服务。
|
||
//
|
||
// 职责边界：
|
||
// 1. 只服务于 RPC 开关关闭时的回退路径；
|
||
// 2. 默认 RPC 切流态允许 svc 为 nil，因此所有本地调用前必须经过此处；
|
||
// 3. 缺失时返回 500，提示启动配置和运行时装配不一致，而不是让 handler panic。
|
||
func (api *AgentHandler) localAgentService(c *gin.Context) (*agentsv.AgentService, bool) {
|
||
if api != nil && api.svc != nil {
|
||
return api.svc, true
|
||
}
|
||
respond.DealWithError(c, errors.New("agent local fallback is disabled"))
|
||
return nil, false
|
||
}
|
||
|
||
func toAgentContractScheduleStateItems(items []model.SaveScheduleStatePlacedItem) []agentcontracts.SaveScheduleStatePlacedItem {
|
||
if len(items) == 0 {
|
||
return nil
|
||
}
|
||
result := make([]agentcontracts.SaveScheduleStatePlacedItem, 0, len(items))
|
||
for _, item := range items {
|
||
result = append(result, agentcontracts.SaveScheduleStatePlacedItem{
|
||
TaskItemID: item.TaskItemID,
|
||
Week: item.Week,
|
||
DayOfWeek: item.DayOfWeek,
|
||
StartSection: item.StartSection,
|
||
EndSection: item.EndSection,
|
||
EmbedCourseEventID: item.EmbedCourseEventID,
|
||
})
|
||
}
|
||
return result
|
||
}
|