Add mapped Pro fiducial point layer

Services/FiducialPointService.cs

@@ -1,5 +1,6 @@
 using System.Net;
 using System.Net.Http.Headers;
+using System.Text.Json;
 using System.Text.RegularExpressions;
 
 namespace LMEMappeCatastaliApp.Services;
@@ -7,6 +8,7 @@ namespace LMEMappeCatastaliApp.Services;
 public sealed partial class FiducialPointService
 {
     private const string ServiceBaseUrl = "https://www1.agenziaentrate.gov.it/servizi/Monografie/";
+    private const string MappedPointsUrl = "https://cartografia.globogis.it/arcgis/rest/services/fiduciali/Punti_fiduciali/MapServer/2/query";
     private readonly HttpClient _httpClient = new() { Timeout = TimeSpan.FromSeconds(30) };
 
     public FiducialPointService()
@@ -77,6 +79,105 @@ public sealed partial class FiducialPointService
             .ToArray();
     }
 
+    public async Task<IReadOnlyList<MappedFiducialPoint>> GetMappedFiducialsAsync(
+        string municipalityCode,
+        string sheet,
+        CancellationToken cancellationToken = default)
+    {
+        var municipality = NormalizeCode(municipalityCode);
+        if (!int.TryParse(new string(sheet.Where(char.IsDigit).ToArray()), out var sheetNumber))
+        {
+            throw new ArgumentException("Numero di foglio non valido.", nameof(sheet));
+        }
+
+        var query = new Dictionary<string, string>
+        {
+            ["f"] = "json",
+            ["where"] = $"COMUNENAZI='{municipality}' AND FOGLIO={sheetNumber}",
+            ["outFields"] = "ETICHETTA,PARTICELLA,NORD,EST,ATTENDIBIL,QUOTA,DATAAGGIOR,IDORIGINE,URL_AGENZI,FOGLIO,ALLEGATO,FIDUCIALE",
+            ["returnGeometry"] = "true",
+            ["outSR"] = "3857",
+            ["resultRecordCount"] = "500"
+        };
+        var url = $"{MappedPointsUrl}?{string.Join('&', query.Select(item => $"{item.Key}={Uri.EscapeDataString(item.Value)}"))}";
+        using var response = await _httpClient.GetAsync(url, cancellationToken);
+        response.EnsureSuccessStatusCode();
+        await using var stream = await response.Content.ReadAsStreamAsync(cancellationToken);
+        using var document = await JsonDocument.ParseAsync(stream, cancellationToken: cancellationToken);
+        if (document.RootElement.TryGetProperty("error", out var error))
+        {
+            throw new InvalidOperationException(error.TryGetProperty("message", out var message)
+                ? message.GetString()
+                : "Servizio cartografico PF non disponibile.");
+        }
+
+        if (!document.RootElement.TryGetProperty("features", out var features))
+        {
+            return [];
+        }
+
+        return features.EnumerateArray()
+            .Select(feature => ParseMappedPoint(feature, municipality))
+            .Where(point => point is not null)
+            .Cast<MappedFiducialPoint>()
+            .DistinctBy(point => point.Identifier, StringComparer.OrdinalIgnoreCase)
+            .OrderBy(point => point.Identifier, StringComparer.OrdinalIgnoreCase)
+            .ToArray();
+    }
+
+    private static MappedFiducialPoint? ParseMappedPoint(JsonElement feature, string municipalityCode)
+    {
+        if (!feature.TryGetProperty("geometry", out var geometry)
+            || !TryGetDouble(geometry, "x", out var x)
+            || !TryGetDouble(geometry, "y", out var y))
+        {
+            return null;
+        }
+
+        var attributes = feature.GetProperty("attributes");
+        var label = GetString(attributes, "ETICHETTA");
+        var identifier = FormatIdentifier(label);
+        if (identifier == label)
+        {
+            var sheet = GetString(attributes, "FOGLIO").PadLeft(4, '0');
+            var number = GetString(attributes, "FIDUCIALE").PadLeft(2, '0');
+            identifier = $"PF{number}/{sheet}/{municipalityCode}";
+        }
+
+        const double earthRadius = 6378137d;
+        var longitude = x / earthRadius * 180d / Math.PI;
+        var latitude = (2d * Math.Atan(Math.Exp(y / earthRadius)) - Math.PI / 2d) * 180d / Math.PI;
+        return new MappedFiducialPoint(
+            identifier,
+            latitude,
+            longitude,
+            GetNullableDouble(attributes, "NORD"),
+            GetNullableDouble(attributes, "EST"),
+            GetString(attributes, "ATTENDIBIL"),
+            GetNullableDouble(attributes, "QUOTA"),
+            GetString(attributes, "PARTICELLA"),
+            GetString(attributes, "DATAAGGIOR"),
+            GetString(attributes, "IDORIGINE"));
+    }
+
+    private static bool TryGetDouble(JsonElement element, string name, out double value)
+    {
+        value = 0;
+        return element.TryGetProperty(name, out var property)
+            && (property.ValueKind == JsonValueKind.Number
+                ? property.TryGetDouble(out value)
+                : double.TryParse(property.ToString(), System.Globalization.NumberStyles.Float,
+                    System.Globalization.CultureInfo.InvariantCulture, out value));
+    }
+
+    private static double? GetNullableDouble(JsonElement element, string name) =>
+        TryGetDouble(element, name, out var value) ? value : null;
+
+    private static string GetString(JsonElement element, string name) =>
+        element.TryGetProperty(name, out var property) && property.ValueKind != JsonValueKind.Null
+            ? property.ToString().Trim()
+            : string.Empty;
+
     private async Task<string> GetHtmlAsync(string relativeUrl, CancellationToken cancellationToken)
     {
         using var response = await _httpClient.GetAsync(ServiceBaseUrl + relativeUrl, cancellationToken);
@@ -146,3 +247,16 @@ public sealed partial class FiducialPointService
 public sealed record FiducialAreaOption(string Code, string Name);
 
 public sealed record FiducialPointEntry(string Identifier, string MonographUrl);
+
+public sealed record MappedFiducialPoint(
+    string Identifier,
+    double Latitude,
+    double Longitude,
+    double? CadastralNorth,
+    double? CadastralEast,
+    string Reliability,
+    double? Elevation,
+    string Parcel,
+    string UpdatedAt,
+    string OriginId,
+    string MonographUrl = "");