feat(focas): resolve equipment-tag refs (read + write) via EquipmentTagRefResolver

2026-06-13 11:24:45 -04:00
parent 5ebf541f54
commit 34a42486dc
3 changed files with 126 additions and 2 deletions
@@ -0,0 +1,49 @@
+using System.Text.Json;
+
+namespace ZB.MOM.WW.OtOpcUa.Driver.FOCAS;
+
+/// <summary>Parses an equipment tag's <c>TagConfig</c> JSON (the shape authored by the AdminUI
+/// <c>FocasTagConfigModel</c>) into a transient <see cref="FocasTagDefinition"/> whose
+/// <see cref="FocasTagDefinition.Name"/> equals the reference string itself, so a value the
+/// driver publishes back keys the runtime's forward router correctly.</summary>
+public static class FocasEquipmentTagParser
+{
+    /// <summary>Attempts to parse an equipment-tag reference into a transient definition.</summary>
+    /// <param name="reference">The equipment tag's TagConfig JSON (also used as the def identity).</param>
+    /// <param name="def">The transient definition when parsing succeeds.</param>
+    /// <returns><see langword="true"/> when <paramref name="reference"/> is a FOCAS address object.</returns>
+    public static bool TryParse(string reference, out FocasTagDefinition def)
+    {
+        def = null!;
+        // Authored tag names never start with '{' (AdminUI name validation), so a leading brace marks an equipment-tag TagConfig blob.
+        if (string.IsNullOrWhiteSpace(reference) || reference[0] != '{') return false;
+        try
+        {
+            using var doc = JsonDocument.Parse(reference);
+            var root = doc.RootElement;
+            // The address string is FOCAS's sole mandatory address field (FocasTagConfigModel.Validate).
+            if (root.ValueKind != JsonValueKind.Object
+                || !root.TryGetProperty("address", out var addr)
+                || addr.ValueKind != JsonValueKind.String)
+                return false;
+            var address = addr.GetString();
+            if (string.IsNullOrWhiteSpace(address)) return false;
+            var dataType = ReadEnum(root, "dataType", FocasDataType.Int32);
+            var deviceHostAddress = ReadString(root, "deviceHostAddress") ?? "";
+            def = new FocasTagDefinition(
+                Name: reference, DeviceHostAddress: deviceHostAddress, Address: address,
+                DataType: dataType, Writable: true);
+            return true;
+        }
+        catch (JsonException) { return false; }
+        catch (FormatException) { return false; }
+        catch (InvalidOperationException) { return false; }
+    }
+
+    private static TEnum ReadEnum<TEnum>(JsonElement o, string name, TEnum fallback) where TEnum : struct, Enum
+        => o.TryGetProperty(name, out var e) && e.ValueKind == JsonValueKind.String
+           && Enum.TryParse<TEnum>(e.GetString(), ignoreCase: true, out var v) ? v : fallback;
+
+    private static string? ReadString(JsonElement o, string name)
+        => o.TryGetProperty(name, out var e) && e.ValueKind == JsonValueKind.String ? e.GetString() : null;
+}