Joseph Doherty
106 lines
3.9 KiB
C#
106 lines
3.9 KiB
C#
using CommunityToolkit.Mvvm.ComponentModel;
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namespace ZB.MOM.WW.OtOpcUa.Client.UI.ViewModels;
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/// <summary>
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/// Represents a single alarm event row.
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/// </summary>
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public class AlarmEventViewModel : ObservableObject
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{
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/// <summary>
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/// Creates an alarm row model from an OPC UA condition event so the alarms tab can display and acknowledge it.
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/// </summary>
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/// <param name="sourceName">The source object or variable name associated with the alarm.</param>
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/// <param name="conditionName">The OPC UA condition name reported by the server.</param>
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/// <param name="severity">The alarm severity value presented to the operator.</param>
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/// <param name="message">The alarm message text shown in the UI.</param>
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/// <param name="retain">Indicates whether the server is retaining the alarm condition.</param>
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/// <param name="activeState">Indicates whether the alarm is currently active.</param>
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/// <param name="ackedState">Indicates whether the alarm has already been acknowledged.</param>
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/// <param name="time">The event timestamp associated with the alarm state.</param>
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/// <param name="eventId">The OPC UA event identifier used for acknowledgment calls.</param>
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/// <param name="conditionNodeId">The condition node identifier used when acknowledging the alarm.</param>
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public AlarmEventViewModel(
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string sourceName,
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string conditionName,
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ushort severity,
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string message,
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bool retain,
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bool activeState,
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bool ackedState,
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DateTime time,
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byte[]? eventId = null,
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string? conditionNodeId = null)
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{
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SourceName = sourceName;
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ConditionName = conditionName;
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Severity = severity;
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Message = message;
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Retain = retain;
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ActiveState = activeState;
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AckedState = ackedState;
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Time = time;
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EventId = eventId;
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ConditionNodeId = conditionNodeId;
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}
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/// <summary>
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/// Gets the source object or variable name associated with the alarm.
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/// </summary>
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public string SourceName { get; }
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/// <summary>
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/// Gets the OPC UA condition name reported for the alarm event.
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/// </summary>
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public string ConditionName { get; }
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/// <summary>
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/// Gets the severity value shown to the operator.
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/// </summary>
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public ushort Severity { get; }
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/// <summary>
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/// Gets the alarm message text shown in the UI.
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/// </summary>
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public string Message { get; }
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/// <summary>
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/// Gets a value indicating whether the server is retaining the condition.
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/// </summary>
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public bool Retain { get; }
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/// <summary>
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/// Gets a value indicating whether the alarm is currently active.
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/// </summary>
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public bool ActiveState { get; }
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/// <summary>
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/// Gets a value indicating whether the alarm has already been acknowledged.
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/// </summary>
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public bool AckedState { get; }
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/// <summary>
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/// Gets the event timestamp displayed for the alarm row.
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/// </summary>
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public DateTime Time { get; }
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/// <summary>
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/// Gets the OPC UA event identifier needed to acknowledge the alarm.
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/// </summary>
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public byte[]? EventId { get; }
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/// <summary>
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/// Gets the condition node identifier used for acknowledgment method calls.
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/// </summary>
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public string? ConditionNodeId { get; }
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/// <summary>Whether this alarm can be acknowledged (active, not yet acked, has EventId).</summary>
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public bool CanAcknowledge => ActiveState && !AckedState && EventId != null && ConditionNodeId != null;
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/// <summary>Whether this alarm can be shelved/unshelved (has a ConditionNodeId).</summary>
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public bool CanShelve => ConditionNodeId != null;
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/// <summary>Whether this alarm can be confirmed (already acked, has EventId + ConditionNodeId).</summary>
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public bool CanConfirm => AckedState && EventId != null && ConditionNodeId != null;
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}
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