Rinomina ed evidenzia i gruppi mappa

Services/MapExportService.cs

@@ -78,6 +78,8 @@ public sealed class MapExportService
             BuildStyle("drawing", "ff1679f9", "333c92fb"),
             BuildStyle("poi", "ffff7a00", "33ff7a00"),
             BuildStyle("gps-trail", "ff00a5ff", "2200a5ff"));
+        var categoryFolders = new Dictionary<string, XElement>(StringComparer.Ordinal);
+        var groupFolders = new Dictionary<(string Category, string Group), XElement>();
 
         foreach (var feature in features.EnumerateArray())
         {
@@ -102,7 +104,31 @@ public sealed class MapExportService
                 placemark.Add(extendedData);
             }
             placemark.Add(BuildGeometry(geometry));
-            document.Add(placemark);
+            var categoryName = GetString(properties, "_lmeCategoryName")?.Trim();
+            var groupName = GetString(properties, "_lmeGroupName")?.Trim();
+            var parent = document;
+            if (!string.IsNullOrWhiteSpace(categoryName))
+            {
+                if (!categoryFolders.TryGetValue(categoryName, out var categoryFolder))
+                {
+                    categoryFolder = new XElement(Kml + "Folder", new XElement(Kml + "name", categoryName));
+                    categoryFolders[categoryName] = categoryFolder;
+                    document.Add(categoryFolder);
+                }
+                parent = categoryFolder;
+            }
+            if (!string.IsNullOrWhiteSpace(groupName))
+            {
+                var key = (categoryName ?? string.Empty, groupName);
+                if (!groupFolders.TryGetValue(key, out var groupFolder))
+                {
+                    groupFolder = new XElement(Kml + "Folder", new XElement(Kml + "name", groupName));
+                    groupFolders[key] = groupFolder;
+                    parent.Add(groupFolder);
+                }
+                parent = groupFolder;
+            }
+            parent.Add(placemark);
         }
 
         return new XDocument(new XDeclaration("1.0", "utf-8", null), new XElement(Kml + "kml", document)).ToString();