第 5 阶段：纠纷、通知与后台-1

backend/internal/modules/systemconfig/handler.go

@@ -0,0 +1,71 @@
+package systemconfig
+
+import (
+	"errors"
+	"net/http"
+
+	"hfb_sys/backend/internal/middleware"
+	"hfb_sys/backend/pkg/response"
+
+	"github.com/gin-gonic/gin"
+)
+
+type Handler struct {
+	service *Service
+}
+
+func NewHandler(service *Service) *Handler {
+	return &Handler{service: service}
+}
+
+func (h *Handler) List(c *gin.Context) {
+	items, err := h.service.List()
+	if err != nil {
+		writeConfigError(c, err)
+		return
+	}
+	response.OK(c, gin.H{"items": items})
+}
+
+func (h *Handler) Update(c *gin.Context) {
+	userID, ok := currentUserID(c)
+	if !ok {
+		response.Unauthorized(c, "缺少用户上下文")
+		return
+	}
+	key := c.Param("key")
+	var req UpdateRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		response.BadRequest(c, "配置值不能为空")
+		return
+	}
+	item, err := h.service.Update(userID, key, req, AuditMeta{
+		IP:        c.ClientIP(),
+		UserAgent: c.GetHeader("User-Agent"),
+	})
+	if err != nil {
+		writeConfigError(c, err)
+		return
+	}
+	response.OK(c, item)
+}
+
+func currentUserID(c *gin.Context) (uint64, bool) {
+	value, ok := c.Get(middleware.ContextUserID)
+	if !ok {
+		return 0, false
+	}
+	userID, ok := value.(uint64)
+	return userID, ok
+}
+
+func writeConfigError(c *gin.Context, err error) {
+	switch {
+	case errors.Is(err, ErrDependencyUnavailable):
+		response.ServiceUnavailable(c, "数据库未连接")
+	case errors.Is(err, ErrInvalidConfig):
+		response.BadRequest(c, "配置不符合规则")
+	default:
+		response.Error(c, http.StatusInternalServerError, "internal_error", "系统配置服务暂时不可用")
+	}
+}