feat(admin): 管理端在线监控 + 好友关系管理后端

- admin/service/online_service.go: 在线用户列表/计数
- admin/controller/online_controller.go: GET /admin/online/users|count
- admin/service/contact_manage_service.go: 好友关系分页查询/管理员删除
- admin/controller/contact_manage_controller.go: GET|DELETE /admin/contacts
- 更新 admin router/provider/wire 集成新控制器

Made-with: Cursor

backend/go-service/app/admin/controller/contact_manage_controller.go

@@ -0,0 +1,50 @@
+package controller
+
+import (
+	"strconv"
+
+	"github.com/echochat/backend/app/admin/service"
+	"github.com/echochat/backend/pkg/utils"
+	"github.com/gin-gonic/gin"
+)
+
+type ContactManageController struct {
+	contactManageService *service.ContactManageService
+}
+
+func NewContactManageController(contactManageService *service.ContactManageService) *ContactManageController {
+	return &ContactManageController{contactManageService: contactManageService}
+}
+
+// GetAllContacts GET /api/v1/admin/contacts
+func (ctl *ContactManageController) GetAllContacts(c *gin.Context) {
+	ctx := c.Request.Context()
+	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
+	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "20"))
+
+	contacts, total, err := ctl.contactManageService.GetAllFriendships(ctx, page, pageSize)
+	if err != nil {
+		utils.ResponseError(c, "获取好友关系列表失败")
+		return
+	}
+	utils.ResponseOK(c, gin.H{
+		"list":  contacts,
+		"total": total,
+	})
+}
+
+// DeleteContact DELETE /api/v1/admin/contacts/:id
+func (ctl *ContactManageController) DeleteContact(c *gin.Context) {
+	ctx := c.Request.Context()
+	id, err := strconv.ParseInt(c.Param("id"), 10, 64)
+	if err != nil {
+		utils.ResponseBadRequest(c, "ID 格式错误")
+		return
+	}
+
+	if err := ctl.contactManageService.DeleteFriendship(ctx, id); err != nil {
+		utils.ResponseError(c, "删除好友关系失败")
+		return
+	}
+	utils.ResponseOK(c, nil)
+}

backend/go-service/app/admin/controller/online_controller.go

@@ -0,0 +1,37 @@
+package controller
+
+import (
+	"github.com/echochat/backend/app/admin/service"
+	"github.com/echochat/backend/pkg/utils"
+	"github.com/gin-gonic/gin"
+)
+
+type OnlineController struct {
+	onlineManageService *service.OnlineManageService
+}
+
+func NewOnlineController(onlineManageService *service.OnlineManageService) *OnlineController {
+	return &OnlineController{onlineManageService: onlineManageService}
+}
+
+// GetOnlineUsers GET /api/v1/admin/online/users
+func (ctl *OnlineController) GetOnlineUsers(c *gin.Context) {
+	ctx := c.Request.Context()
+	userIDs, err := ctl.onlineManageService.GetOnlineUsers(ctx)
+	if err != nil {
+		utils.ResponseError(c, "获取在线用户列表失败")
+		return
+	}
+	utils.ResponseOK(c, userIDs)
+}
+
+// GetOnlineCount GET /api/v1/admin/online/count
+func (ctl *OnlineController) GetOnlineCount(c *gin.Context) {
+	ctx := c.Request.Context()
+	count, err := ctl.onlineManageService.GetOnlineCount(ctx)
+	if err != nil {
+		utils.ResponseError(c, "获取在线用户数失败")
+		return
+	}
+	utils.ResponseOK(c, gin.H{"count": count})
+}