Dui3 178 gridlines (#3554)

add gridline conversion

Co-authored-by: Connor Ivy <connor@speckle.systems>

DUI3-DX/Converters/Revit/Speckle.Converters.RevitShared/Speckle.Converters.RevitShared.projitems

@@ -36,6 +36,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)ToHost\Raw\Geometry\PolylineConverterToHost.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ToHost\Raw\Geometry\VectorConverterToHost.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ToHost\TopLevel\BaseTopLevelConverterToHost.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ToHost\TopLevel\GridlineToHostTopLevelConverter.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ToHost\TopLevel\ModelCurveToSpeckleTopLevelConverter.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ToSpeckle\Raw\BeamConversionToSpeckle.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ToSpeckle\Raw\BoundarySegmentConversionToSpeckle.cs" />

DUI3-DX/Converters/Revit/Speckle.Converters.RevitShared/ToHost/TopLevel/GridlineToHostTopLevelConverter.cs

@@ -0,0 +1,56 @@
+using Objects;
+using Speckle.Converters.Common;
+using Speckle.Converters.Common.Objects;
+using Speckle.Converters.RevitShared.Helpers;
+using Speckle.Converters.RevitShared.ToSpeckle;
+
+namespace Speckle.Converters.RevitShared.ToHost.TopLevel;
+
+[NameAndRankValue(nameof(SOBE.GridLine), 0)]
+internal class GridlineToHostTopLevelConverter : BaseTopLevelConverterToHost<SOBE.GridLine, DB.Grid>
+{
+  private readonly ITypedConverter<ICurve, DB.CurveArray> _curveConverter;
+  private readonly IRevitConversionContextStack _contextStack;
+
+  public GridlineToHostTopLevelConverter(
+    ITypedConverter<ICurve, DB.CurveArray> curveConverter,
+    IRevitConversionContextStack contextStack
+  )
+  {
+    _curveConverter = curveConverter;
+    _contextStack = contextStack;
+  }
+
+  public override DB.Grid Convert(SOBE.GridLine target)
+  {
+    DB.Curve curve = _curveConverter.Convert(target.baseLine).get_Item(0);
+
+    using DB.Grid revitGrid = curve switch
+    {
+      DB.Arc arc => DB.Grid.Create(_contextStack.Current.Document, arc),
+      DB.Line line => DB.Grid.Create(_contextStack.Current.Document, line),
+      _ => throw new SpeckleConversionException($"Grid line curve is of type {curve.GetType()} which is not supported")
+    };
+
+    if (!string.IsNullOrEmpty(target.label) && !GridNameIsTaken(target.label))
+    {
+      revitGrid.Name = target.label;
+    }
+
+    return revitGrid;
+  }
+
+  private bool GridNameIsTaken(string gridName)
+  {
+    using var collector = new DB.FilteredElementCollector(_contextStack.Current.Document);
+
+    IEnumerable<string> gridNames = collector
+      .WhereElementIsNotElementType()
+      .OfClass(typeof(DB.Grid))
+      .ToElements()
+      .Cast<DB.Grid>()
+      .Select(grid => grid.Name);
+
+    return gridNames.Contains(gridName);
+  }
+}