initial: ZeroTier-like P2P mesh VPN server with multi-tenant Web UI

internal/handler/admin.go

@@ -0,0 +1,62 @@
+package handler
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+
+	"zeromesh/internal/database"
+	"zeromesh/internal/model"
+	"zeromesh/internal/service"
+)
+
+type AdminHandler struct {
+	authService *service.AuthService
+	db          *database.DB
+	nodeService *service.NodeService
+	netService  *service.NetworkService
+}
+
+func NewAdminHandler(authService *service.AuthService, db *database.DB, nodeService *service.NodeService, netService *service.NetworkService) *AdminHandler {
+	return &AdminHandler{
+		authService: authService,
+		db:          db,
+		nodeService: nodeService,
+		netService:  netService,
+	}
+}
+
+func (h *AdminHandler) Dashboard(c *gin.Context) {
+	uid := userID(c)
+
+	var authorizedMembers int64
+	if isAdmin(c) {
+		h.db.Model(&model.NetworkMember{}).Where("authorized = ?", true).Count(&authorizedMembers)
+	} else {
+		networks, _ := h.netService.ListNetworks(uid)
+		var ids []uint32
+		for _, n := range networks {
+			ids = append(ids, n.NetworkID)
+		}
+		if len(ids) > 0 {
+			h.db.Model(&model.NetworkMember{}).Where("authorized = ? AND network_id IN ?", true, ids).Count(&authorizedMembers)
+		}
+	}
+
+	nodes, _ := h.nodeService.ListNode(uid)
+	var online int64
+	for _, n := range nodes {
+		if n.Online {
+			online++
+		}
+	}
+
+	networks, _ := h.netService.ListNetworks(uid)
+
+	c.JSON(http.StatusOK, gin.H{
+		"authorized_members": authorizedMembers,
+		"nodes_total":        len(nodes),
+		"nodes_online":       online,
+		"networks_count":     len(networks),
+	})
+}