✨ 新增几大中心功能

server/service/system/app_online_config.go

@@ -0,0 +1,30 @@
+package system
+
+import (
+	"strconv"
+	"strings"
+
+	"git.echol.cn/loser/Go-Web-Template/server/global"
+	"git.echol.cn/loser/Go-Web-Template/server/model/system"
+	"gorm.io/gorm"
+)
+
+const paramAppOnlineWindowMinutes = "app.online_active_window_minutes"
+
+// GetAppOnlineWindowMinutes 在线判定窗口（分钟），默认 5
+func GetAppOnlineWindowMinutes() int {
+	var rec system.SysParams
+	err := global.GVA_DB.Where("key = ?", paramAppOnlineWindowMinutes).First(&rec).Error
+	if err != nil {
+		if err == gorm.ErrRecordNotFound {
+			return 5
+		}
+		return 5
+	}
+	v := strings.TrimSpace(rec.Value)
+	n, e := strconv.Atoi(v)
+	if e != nil || n <= 0 || n > 1440 {
+		return 5
+	}
+	return n
+}