Joseph Doherty
40 lines
1.6 KiB
C#
40 lines
1.6 KiB
C#
using System.Text.Json;
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using System.Text.Json.Nodes;
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namespace ZB.MOM.WW.OtOpcUa.AdminUI.Components.Shared.Drivers;
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/// <summary>
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/// Shared millisecond helpers for the AB forms (#576): the driver factories bind <c>*Ms</c> integers
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/// while the forms edit whole seconds, so a sub-second stored value must survive an edit of an
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/// unrelated field.
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/// </summary>
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internal static class DriverConfigMs
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{
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/// <summary>Reads an integer-millisecond key at <paramref name="path"/> from <paramref name="json"/>, or null.</summary>
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public static int? Read(string? json, string path)
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{
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if (string.IsNullOrWhiteSpace(json)) return null;
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try
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{
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JsonNode? cur = JsonNode.Parse(json);
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foreach (var seg in path.Split('.'))
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{
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if (cur is not JsonObject o) return null;
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cur = o.FirstOrDefault(kv => string.Equals(kv.Key, seg, StringComparison.OrdinalIgnoreCase)).Value;
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}
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return cur is JsonValue v && v.TryGetValue<int>(out var ms) ? ms : null;
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}
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catch (JsonException) { return null; }
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}
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/// <summary>Whole seconds for display (truncating, like the pre-#576 forms).</summary>
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public static int ToSeconds(TimeSpan t) => (int)t.TotalSeconds;
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/// <summary>
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/// The duration to save: the loaded value when the operator left the seconds field unchanged
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/// (keeps 500 ms from collapsing to 0 s), else the edited whole seconds.
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/// </summary>
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public static TimeSpan Save(int seconds, TimeSpan? loaded)
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=> loaded is { } l && ToSeconds(l) == seconds ? l : TimeSpan.FromSeconds(seconds);
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}
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