xenadmin/XenAdmin/Diagnostics/Checks/HostMaintenanceModeCheck.cs

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using XenAPI;
using XenAdmin.Diagnostics.Problems;
using XenAdmin.Diagnostics.Problems.HostProblem;

namespace XenAdmin.Diagnostics.Checks
{
    class HostMaintenanceModeCheck : HostLivenessCheck
    {
        private readonly bool checkHostLivenessOnly;

        public HostMaintenanceModeCheck(Host host, bool checkHostLivenessOnly = false)
            : base(host)
        {
            this.checkHostLivenessOnly = checkHostLivenessOnly;
        }

        protected override Problem RunCheck()
        {
            var problem = base.RunCheck();
            if (problem != null)
                return problem;

            if (checkHostLivenessOnly)
                return null;

            // Check the host is not in Maintenance Mode (or disabled)
            if (Host.MaintenanceMode() || !Host.enabled)
            {
                return new HostMaintenanceMode(this, Host);
            }
            return null;
        }
    }
}