Joseph Doherty
84 lines
3.8 KiB
C#
84 lines
3.8 KiB
C#
using System.Text;
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using System.Text.Json;
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namespace ZB.MOM.WW.ScadaBridge.CLI;
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/// <summary>
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/// Serializes typed alarm-setpoint CLI flags into the trigger-config JSON the
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/// server expects. Key names MUST stay in lockstep with the canonical codec at
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/// src/ZB.MOM.WW.ScadaBridge.CentralUI/Components/Shared/AlarmTriggerConfigCodec.cs
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/// (that codec is internal to CentralUI, so this is a deliberate CLI-side mirror;
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/// the round-trip test verifies the JSON against the live server — the real contract).
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/// </summary>
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internal static class AlarmTriggerConfigJson
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{
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/// <summary>
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/// Builds the trigger-config JSON for <paramref name="triggerType"/> from the typed
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/// flags, or returns null when none are supplied (so the alarm is created without a
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/// trigger config). Unknown/blank trigger types yield null.
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/// </summary>
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internal static string? Build(
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string triggerType, string? attribute,
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string? matchValue, bool notEquals,
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double? min, double? max,
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double? thresholdPerSecond, double? windowSeconds, string? direction,
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double? loLo, double? lo, double? hi, double? hiHi,
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string? expression)
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{
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var type = triggerType?.Trim();
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var anyTyped = attribute is not null || matchValue is not null || notEquals
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|| min.HasValue || max.HasValue || thresholdPerSecond.HasValue || windowSeconds.HasValue
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|| direction is not null || loLo.HasValue || lo.HasValue || hi.HasValue || hiHi.HasValue
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|| expression is not null;
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if (!anyTyped) return null;
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using var stream = new MemoryStream();
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using (var w = new Utf8JsonWriter(stream))
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{
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w.WriteStartObject();
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if (!string.Equals(type, "Expression", StringComparison.OrdinalIgnoreCase))
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w.WriteString("attributeName", attribute ?? "");
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switch (type?.ToLowerInvariant())
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{
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case "valuematch":
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var mv = matchValue ?? "";
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if (notEquals) mv = "!=" + mv;
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w.WriteString("matchValue", mv);
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break;
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case "rangeviolation":
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if (min.HasValue) w.WriteNumber("min", min.Value);
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if (max.HasValue) w.WriteNumber("max", max.Value);
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break;
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case "rateofchange":
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if (thresholdPerSecond.HasValue) w.WriteNumber("thresholdPerSecond", thresholdPerSecond.Value);
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if (windowSeconds.HasValue) w.WriteNumber("windowSeconds", windowSeconds.Value);
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w.WriteString("direction", NormalizeDirection(direction));
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break;
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case "hilo":
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// Only the four setpoints are exposed as flags. The codec also accepts
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// per-setpoint priorities/deadbands/messages — intentionally omitted here;
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// use raw --trigger-config for those (see the YAGNI scope guard in the plan).
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if (loLo.HasValue) w.WriteNumber("loLo", loLo.Value);
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if (lo.HasValue) w.WriteNumber("lo", lo.Value);
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if (hi.HasValue) w.WriteNumber("hi", hi.Value);
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if (hiHi.HasValue) w.WriteNumber("hiHi", hiHi.Value);
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break;
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case "expression":
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w.WriteString("expression", expression ?? "");
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break;
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}
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w.WriteEndObject();
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}
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return Encoding.UTF8.GetString(stream.ToArray());
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}
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// Mirrors AlarmTriggerConfigCodec.NormalizeDirection.
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private static string NormalizeDirection(string? raw) => raw?.ToLowerInvariant() switch
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{
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"rising" or "up" or "positive" => "rising",
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"falling" or "down" or "negative" => "falling",
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_ => "either",
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};
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}
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