add back dynamic columns

weed/admin/dash/admin_server.go

@@ -148,8 +148,19 @@ type ClusterVolumesData struct {
 	SortOrder string `json:"sort_order"`
 
 	// Statistics
-	RackCount     int `json:"rack_count"`
-	DiskTypeCount int `json:"disk_type_count"`
+	DataCenterCount int `json:"datacenter_count"`
+	RackCount       int `json:"rack_count"`
+	DiskTypeCount   int `json:"disk_type_count"`
+
+	// Conditional display flags
+	ShowDataCenterColumn bool `json:"show_datacenter_column"`
+	ShowRackColumn       bool `json:"show_rack_column"`
+	ShowDiskTypeColumn   bool `json:"show_disk_type_column"`
+
+	// Single values when only one exists
+	SingleDataCenter string `json:"single_datacenter"`
+	SingleRack       string `json:"single_rack"`
+	SingleDiskType   string `json:"single_disk_type"`
 }
 
 type CollectionInfo struct {
@@ -857,10 +868,14 @@ func (s *AdminServer) GetClusterVolumes(page int, pageSize int, sortBy string, s
 		return nil, err
 	}
 
-	// Calculate unique rack and disk type counts from all volumes
+	// Calculate unique data center, rack, and disk type counts from all volumes
+	dataCenterMap := make(map[string]bool)
 	rackMap := make(map[string]bool)
 	diskTypeMap := make(map[string]bool)
 	for _, volume := range volumes {
+		if volume.DataCenter != "" {
+			dataCenterMap[volume.DataCenter] = true
+		}
 		if volume.Rack != "" {
 			rackMap[volume.Rack] = true
 		}
@@ -870,6 +885,7 @@ func (s *AdminServer) GetClusterVolumes(page int, pageSize int, sortBy string, s
 		}
 		diskTypeMap[diskType] = true
 	}
+	dataCenterCount := len(dataCenterMap)
 	rackCount := len(rackMap)
 	diskTypeCount := len(diskTypeMap)
 
@@ -895,18 +911,50 @@ func (s *AdminServer) GetClusterVolumes(page int, pageSize int, sortBy string, s
 		volumes = volumes[startIndex:endIndex]
 	}
 
+	// Determine conditional display flags and extract single values
+	showDataCenterColumn := dataCenterCount > 1
+	showRackColumn := rackCount > 1
+	showDiskTypeColumn := diskTypeCount > 1
+
+	var singleDataCenter, singleRack, singleDiskType string
+	if dataCenterCount == 1 {
+		for dc := range dataCenterMap {
+			singleDataCenter = dc
+			break
+		}
+	}
+	if rackCount == 1 {
+		for rack := range rackMap {
+			singleRack = rack
+			break
+		}
+	}
+	if diskTypeCount == 1 {
+		for diskType := range diskTypeMap {
+			singleDiskType = diskType
+			break
+		}
+	}
+
 	return &ClusterVolumesData{
-		Volumes:       volumes,
-		TotalVolumes:  totalVolumes,
-		TotalSize:     totalSize,
-		LastUpdated:   time.Now(),
-		CurrentPage:   page,
-		TotalPages:    totalPages,
-		PageSize:      pageSize,
-		SortBy:        sortBy,
-		SortOrder:     sortOrder,
-		RackCount:     rackCount,
-		DiskTypeCount: diskTypeCount,
+		Volumes:              volumes,
+		TotalVolumes:         totalVolumes,
+		TotalSize:            totalSize,
+		LastUpdated:          time.Now(),
+		CurrentPage:          page,
+		TotalPages:           totalPages,
+		PageSize:             pageSize,
+		SortBy:               sortBy,
+		SortOrder:            sortOrder,
+		DataCenterCount:      dataCenterCount,
+		RackCount:            rackCount,
+		DiskTypeCount:        diskTypeCount,
+		ShowDataCenterColumn: showDataCenterColumn,
+		ShowRackColumn:       showRackColumn,
+		ShowDiskTypeColumn:   showDiskTypeColumn,
+		SingleDataCenter:     singleDataCenter,
+		SingleRack:           singleRack,
+		SingleDiskType:       singleDiskType,
 	}, nil
 }