[优化] 添加访问日志地区解析功能，更新相关数据结构和前端展示

atsf_server/model/node_access_log.go

@@ -7,6 +7,7 @@ type NodeAccessLog struct {
 	NodeID     string    `json:"node_id" gorm:"index;size:64;not null"`
 	LoggedAt   time.Time `json:"logged_at" gorm:"index"`
 	RemoteAddr string    `json:"remote_addr" gorm:"size:128"`
+	Region     string    `json:"region" gorm:"size:128"`
 	Host       string    `json:"host" gorm:"size:255"`
 	Path       string    `json:"path" gorm:"size:2048"`
 	StatusCode int       `json:"status_code"`
@@ -14,6 +15,11 @@ type NodeAccessLog struct {
 	CreatedAt  time.Time `json:"created_at"`
 }
 
+type NodeAccessLogRegionCount struct {
+	Region string `json:"region"`
+	Count  int64  `json:"count"`
+}
+
 func ListNodeAccessLogs(nodeID string, since time.Time, offset int, limit int) (logs []*NodeAccessLog, err error) {
 	query := DB.Order("logged_at desc, id desc")
 	if nodeID != "" {
@@ -51,3 +57,21 @@ func CountNodeAccessLogs(nodeID string, since time.Time) (totalRecords int64, to
 	}
 	return totalRecords, totalIPs, nil
 }
+
+func ListNodeAccessLogRegionCounts(nodeID string, since time.Time, limit int) (items []*NodeAccessLogRegionCount, err error) {
+	query := DB.Model(&NodeAccessLog{}).
+		Select("region as region, count(*) as count").
+		Where("region <> ''")
+	if nodeID != "" {
+		query = query.Where("node_id = ?", nodeID)
+	}
+	if !since.IsZero() {
+		query = query.Where("logged_at >= ?", since)
+	}
+	query = query.Group("region").Order("count desc, region asc")
+	if limit > 0 {
+		query = query.Limit(limit)
+	}
+	err = query.Scan(&items).Error
+	return items, err
+}