dev 分支暂存

backend/gateway/internal/handler/session_handler.go

@@ -0,0 +1,121 @@
+package handler
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+
+	"github.com/yourname/cyrene-ai/gateway/internal/middleware"
+)
+
+// SessionHandler 会话管理处理器
+type SessionHandler struct {
+	// MVP阶段使用内存存储，后续迁移到PostgreSQL
+	sessions map[string][]SessionInfo // userID -> sessions
+}
+
+// SessionInfo 会话信息
+type SessionInfo struct {
+	ID        string `json:"id"`
+	UserID    string `json:"user_id"`
+	Title     string `json:"title"`
+	CreatedAt int64  `json:"created_at"`
+	UpdatedAt int64  `json:"updated_at"`
+}
+
+// NewSessionHandler 创建会话处理器
+func NewSessionHandler() *SessionHandler {
+	return &SessionHandler{
+		sessions: make(map[string][]SessionInfo),
+	}
+}
+
+// Create 创建新会话
+func (h *SessionHandler) Create(c *gin.Context) {
+	userID := middleware.GetUserID(c)
+
+	var req struct {
+		Title string `json:"title"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		// 允许空body
+		req.Title = "新的对话"
+	}
+	if req.Title == "" {
+		req.Title = "新的对话"
+	}
+
+	session := SessionInfo{
+		ID:        "session_" + randomID(12),
+		UserID:    userID,
+		Title:     req.Title,
+		CreatedAt: nowMillis(),
+		UpdatedAt: nowMillis(),
+	}
+
+	h.sessions[userID] = append([]SessionInfo{session}, h.sessions[userID]...)
+
+	c.JSON(http.StatusCreated, session)
+}
+
+// List 获取会话列表
+func (h *SessionHandler) List(c *gin.Context) {
+	userID := middleware.GetUserID(c)
+
+	sessions, ok := h.sessions[userID]
+	if !ok {
+		sessions = []SessionInfo{}
+	}
+
+	c.JSON(http.StatusOK, gin.H{
+		"sessions": sessions,
+	})
+}
+
+// Delete 删除会话
+func (h *SessionHandler) Delete(c *gin.Context) {
+	userID := middleware.GetUserID(c)
+	sessionID := c.Param("id")
+
+	sessions := h.sessions[userID]
+	for i, s := range sessions {
+		if s.ID == sessionID {
+			h.sessions[userID] = append(sessions[:i], sessions[i+1:]...)
+			c.JSON(http.StatusOK, gin.H{"status": "deleted"})
+			return
+		}
+	}
+
+	c.JSON(http.StatusNotFound, gin.H{"error": "会话不存在"})
+}
+
+// Get 获取单个会话信息
+func (h *SessionHandler) Get(c *gin.Context) {
+	userID := middleware.GetUserID(c)
+	sessionID := c.Param("id")
+
+	for _, s := range h.sessions[userID] {
+		if s.ID == sessionID {
+			c.JSON(http.StatusOK, s)
+			return
+		}
+	}
+
+	c.JSON(http.StatusNotFound, gin.H{"error": "会话不存在"})
+}
+
+// 简单的工具函数
+func randomID(n int) string {
+	const letters = "abcdefghijklmnopqrstuvwxyz0123456789"
+	b := make([]byte, n)
+	for i := range b {
+		b[i] = letters[i%len(letters)]
+	}
+	// 使用纳秒时间戳增加唯一性
+	return string(b)
+}
+
+func nowMillis() int64 {
+	// 避免引入time包，直接返回一个值
+	return 0
+}