feat: make PepApi cross-platform for Linux Docker

- Add LaserQuoteBaseUrl config property to PepTools
- Implement CompareGeometry() MCP tool to compare part geometry between PEP and LaserQuote
- Read LaserQuoteBaseUrl from appsettings.json in Program.cs
- Add appsettings.json with LaserQuoteBaseUrl config
- Update PepMcp.csproj to copy appsettings.json to output directory

PepApi.Core/Controllers/DrawingsController.cs

@@ -2,6 +2,7 @@ using Microsoft.AspNetCore.Mvc;
 using Microsoft.EntityFrameworkCore;
 using PepApi.Core.Models;
 using PepLib.Data;
+using PepLib.IO;
 
 namespace PepApi.Core.Controllers;
 
@@ -147,6 +148,38 @@ public class DrawingsController : ControllerBase
         });
     }
 
+    /// <summary>
+    /// Export a drawing as a DXF file.
+    /// </summary>
+    [HttpGet("{name}/dxf")]
+    public async Task<IActionResult> GetDrawingDxf(string name)
+    {
+        var drawing = await _db.Drawings
+            .Where(d => d.Name.ToUpper() == name.ToUpper())
+            .FirstOrDefaultAsync();
+
+        if (drawing == null)
+            return NotFound(new { message = "Drawing not found in database" });
+
+        var filePath = drawing.Path + drawing.File;
+
+        if (!System.IO.File.Exists(filePath))
+            return NotFound(new { message = "Drawing file not found on disk" });
+
+        PepLib.Models.Drawing pep;
+        try
+        {
+            pep = PepLib.Models.Drawing.Load(filePath);
+        }
+        catch (Exception ex)
+        {
+            return StatusCode(500, new { message = $"Failed to load drawing: {ex.Message}" });
+        }
+
+        var stream = DrawingDxfExporter.Export(pep);
+        return File(stream, "application/dxf", $"{name}.dxf");
+    }
+
     private static DrawingDetails ConvertToDetails(Drawing drawing)
     {
         return new DrawingDetails

PepApi.Core/Program.cs

@@ -6,7 +6,8 @@ var builder = WebApplication.CreateBuilder(args);
 
 
 
-// Enable Windows Service hosting
+// Enable Windows Service hosting (only on Windows)
+if (OperatingSystem.IsWindows())
     builder.Host.UseWindowsService();
 
 // Add services to the container

PepApi.sln

@@ -9,6 +9,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "PepLib.Core", "PepLib.Core\
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "PepMcp", "PepMcp\PepMcp.csproj", "{28899B7B-2185-4141-B348-E227DFB355E9}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "PepLib.Core.Tests", "PepLib.Core.Tests\PepLib.Core.Tests.csproj", "{FF7E4CB2-8825-4A03-9D0C-CC713BD93A18}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -55,6 +57,18 @@ Global
 		{28899B7B-2185-4141-B348-E227DFB355E9}.Release|x64.Build.0 = Release|Any CPU
 		{28899B7B-2185-4141-B348-E227DFB355E9}.Release|x86.ActiveCfg = Release|Any CPU
 		{28899B7B-2185-4141-B348-E227DFB355E9}.Release|x86.Build.0 = Release|Any CPU
+		{FF7E4CB2-8825-4A03-9D0C-CC713BD93A18}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{FF7E4CB2-8825-4A03-9D0C-CC713BD93A18}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{FF7E4CB2-8825-4A03-9D0C-CC713BD93A18}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{FF7E4CB2-8825-4A03-9D0C-CC713BD93A18}.Debug|x64.Build.0 = Debug|Any CPU
+		{FF7E4CB2-8825-4A03-9D0C-CC713BD93A18}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{FF7E4CB2-8825-4A03-9D0C-CC713BD93A18}.Debug|x86.Build.0 = Debug|Any CPU
+		{FF7E4CB2-8825-4A03-9D0C-CC713BD93A18}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{FF7E4CB2-8825-4A03-9D0C-CC713BD93A18}.Release|Any CPU.Build.0 = Release|Any CPU
+		{FF7E4CB2-8825-4A03-9D0C-CC713BD93A18}.Release|x64.ActiveCfg = Release|Any CPU
+		{FF7E4CB2-8825-4A03-9D0C-CC713BD93A18}.Release|x64.Build.0 = Release|Any CPU
+		{FF7E4CB2-8825-4A03-9D0C-CC713BD93A18}.Release|x86.ActiveCfg = Release|Any CPU
+		{FF7E4CB2-8825-4A03-9D0C-CC713BD93A18}.Release|x86.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

PepLib.Core.Tests/IO/DrawingDxfExporterTests.cs

@@ -0,0 +1,67 @@
+using PepLib.Codes;
+using PepLib.Enums;
+using PepLib.Geometry;
+using PepLib.IO;
+using PepLib.Models;
+using Xunit;
+
+namespace PepLib.Core.Tests.IO;
+
+public class DrawingDxfExporterTests
+{
+    [Fact]
+    public void Export_RectangularLoop_ProducesFourLines()
+    {
+        // Arrange: a square 10x10 in incremental mode
+        var drawing = new Drawing();
+        drawing.Info = new DrawingInfo { Name = "TEST" };
+        var loop = new Loop { Name = "TEST.loop-000" };
+        // Mode defaults to Incremental in Loop constructor
+        loop.Add(new RapidMove(new Vector(0, 0)));   // position at (0,0)
+        loop.Add(new LinearMove(new Vector(10, 0)));  // → (10,0)
+        loop.Add(new LinearMove(new Vector(0, 10)));  // → (10,10)
+        loop.Add(new LinearMove(new Vector(-10, 0))); // → (0,10)
+        loop.Add(new LinearMove(new Vector(0, -10))); // → (0,0)
+        drawing.Loops.Add(loop);
+
+        // Act
+        using var stream = DrawingDxfExporter.Export(drawing);
+
+        // Assert: stream is non-empty and contains 4 line entities
+        Assert.True(stream.Length > 0);
+
+        stream.Position = 0;
+        using var reader = new ACadSharp.IO.DxfReader(stream);
+        var doc = reader.Read();
+        var lines = doc.Entities.OfType<ACadSharp.Entities.Line>().ToList();
+        var arcs = doc.Entities.OfType<ACadSharp.Entities.Arc>().ToList();
+        Assert.Equal(4, lines.Count);
+        Assert.Empty(arcs);
+    }
+
+    [Fact]
+    public void Export_LoopWithArc_ProducesLineAndArc()
+    {
+        var drawing = new Drawing();
+        drawing.Info = new DrawingInfo { Name = "TEST" };
+        var loop = new Loop { Name = "TEST.loop-000" };
+        loop.Add(new RapidMove(new Vector(5, 0)));                              // start at (5,0)
+        loop.Add(new LinearMove(new Vector(5, 0)));                             // → (10,0)
+        loop.Add(new CircularMove(new Vector(-5, 5), new Vector(-5, 0), RotationType.CCW)); // arc: end=(5,5), center=(5,0)
+        drawing.Loops.Add(loop);
+
+        using var stream = DrawingDxfExporter.Export(drawing);
+
+        stream.Position = 0;
+        using var reader = new ACadSharp.IO.DxfReader(stream);
+        var doc = reader.Read();
+        var lines = doc.Entities.OfType<ACadSharp.Entities.Line>().ToList();
+        var arcs = doc.Entities.OfType<ACadSharp.Entities.Arc>().ToList();
+        Assert.Single(lines);
+        Assert.Single(arcs);
+        var arc = doc.Entities.OfType<ACadSharp.Entities.Arc>().Single();
+        // Angles must be in degrees (0..360), not radians (0..6.28)
+        Assert.InRange(arc.StartAngle, 0, 360);
+        Assert.InRange(arc.EndAngle, 0, 360);
+    }
+}

PepLib.Core.Tests/PepLib.Core.Tests.csproj

@@ -0,0 +1,23 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
+    <PackageReference Include="xunit" Version="2.9.3" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2">
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+    <PackageReference Include="ACadSharp" Version="3.1.32" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\PepLib.Core\PepLib.Core.csproj" />
+  </ItemGroup>
+
+</Project>

PepLib.Core/IO/DrawingDxfExporter.cs

@@ -0,0 +1,107 @@
+using ACadSharp;
+using ACadSharp.IO;
+using ACadSharp.Tables;
+using CSMath;
+using PepLib.Codes;
+using PepLib.Enums;
+using PepLib.Geometry;
+using PepLib.Models;
+using AcadArc = ACadSharp.Entities.Arc;
+using AcadCircle = ACadSharp.Entities.Circle;
+using AcadLine = ACadSharp.Entities.Line;
+
+namespace PepLib.IO;
+
+public static class DrawingDxfExporter
+{
+    public static Stream Export(Drawing drawing)
+    {
+        var doc = new CadDocument();
+
+        foreach (var loop in drawing.Loops)
+        {
+            var layer = new Layer(loop.Name);
+            doc.Layers.Add(layer);
+
+            var pos = new Vector();
+
+            foreach (var code in loop)
+            {
+                switch (code.CodeType())
+                {
+                    case CodeType.RapidMove:
+                        pos = Advance(pos, ((RapidMove)code).EndPoint, loop.Mode);
+                        break;
+
+                    case CodeType.LinearMove:
+                        var lm = (LinearMove)code;
+                        var lineEnd = Advance(pos, lm.EndPoint, loop.Mode);
+                        doc.Entities.Add(new AcadLine
+                        {
+                            StartPoint = ToXYZ(pos),
+                            EndPoint = ToXYZ(lineEnd),
+                            Layer = layer
+                        });
+                        pos = lineEnd;
+                        break;
+
+                    case CodeType.CircularMove:
+                        var cm = (CircularMove)code;
+                        var arcEnd = Advance(pos, cm.EndPoint, loop.Mode);
+                        var arcCenter = Advance(pos, cm.CenterPoint, loop.Mode);
+
+                        var dx = pos.X - arcCenter.X;
+                        var dy = pos.Y - arcCenter.Y;
+                        var radius = Math.Sqrt(dx * dx + dy * dy);
+
+                        var startAngle = Math.Atan2(pos.Y - arcCenter.Y, pos.X - arcCenter.X);
+                        var endAngle = Math.Atan2(arcEnd.Y - arcCenter.Y, arcEnd.X - arcCenter.X);
+
+                        if (cm.Rotation == RotationType.CW)
+                        {
+                            (startAngle, endAngle) = (endAngle, startAngle);
+                        }
+
+                        if (Math.Abs(startAngle - endAngle) < 1e-10) // full circle
+                        {
+                            doc.Entities.Add(new AcadCircle
+                            {
+                                Center = ToXYZ(arcCenter),
+                                Radius = radius,
+                                Layer = layer
+                            });
+                        }
+                        else
+                        {
+                            doc.Entities.Add(new AcadArc
+                            {
+                                Center = ToXYZ(arcCenter),
+                                Radius = radius,
+                                StartAngle = startAngle * (180.0 / Math.PI),
+                                EndAngle = endAngle * (180.0 / Math.PI),
+                                Layer = layer
+                            });
+                        }
+
+                        pos = arcEnd;
+                        break;
+                }
+            }
+        }
+
+        var buffer = new MemoryStream();
+        using (var writer = new DxfWriter(buffer, doc, false))
+        {
+            writer.Write();
+        }
+
+        var stream = new MemoryStream(buffer.ToArray());
+        return stream;
+    }
+
+    private static Vector Advance(Vector current, Vector offset, ProgrammingMode mode) =>
+        mode == ProgrammingMode.Incremental ? current + offset : offset;
+
+    private static XYZ ToXYZ(Vector v) => new XYZ(v.X, v.Y, 0);
+}
+

PepLib.Core/PepLib.Core.csproj

@@ -7,6 +7,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="ACadSharp" Version="3.1.32" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="9.0.10">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>

PepMcp/PepMcp.csproj

@@ -12,4 +12,10 @@
     <PackageReference Include="Microsoft.Extensions.Hosting" Version="8.0.1" />
   </ItemGroup>
 
+  <ItemGroup>
+    <Content Include="appsettings.json">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </Content>
+  </ItemGroup>
+
 </Project>

PepMcp/PepTools.cs

@@ -10,6 +10,9 @@ public class PepTools
         BaseAddress = new Uri("http://localhost:8085")
     };
 
+    public static string LaserQuoteBaseUrl { get; set; } = "http://localhost:5260";
+    private static readonly HttpClient _laserQuoteClient = new();
+
     private static readonly JsonSerializerOptions _jsonOptions = new()
     {
         PropertyNameCaseInsensitive = true,
@@ -571,4 +574,48 @@ public class PepTools
             return $"Error calling PEP API: {ex.Message}";
         }
     }
+
+    [McpServerTool, Description("Compare the geometry of a part between PEP (nesting software) and LaserQuote (quoting software). Returns bounding box dimensions, cut length, entity counts, pixel diff %, and alignment strategy. Use this to detect when part drawings have drifted between systems.")]
+    public static async Task<string> CompareGeometry(
+        [Description("The part number to compare (e.g., 'SULLYS-003')")] string partNumber)
+    {
+        try
+        {
+            var url = $"{LaserQuoteBaseUrl}/api/geometry/compare?partNumber={Uri.EscapeDataString(partNumber)}";
+            var response = await _laserQuoteClient.GetAsync(url);
+            var json = await response.Content.ReadAsStringAsync();
+
+            var result = System.Text.Json.JsonSerializer.Deserialize<GeometryCompareResult>(json, _jsonOptions);
+
+            if (result?.Error != null)
+                return $"Note: {result.Error}";
+
+            var sb = new System.Text.StringBuilder();
+            sb.AppendLine($"Geometry Comparison: {partNumber}");
+            sb.AppendLine($"Result: {(result?.IsMatch == true ? "MATCH ✓" : "MISMATCH ✗")}");
+            sb.AppendLine($"Pixel Diff: {result?.PixelDiffPercent:F3}%");
+            sb.AppendLine($"Alignment: {result?.AlignmentLabel}");
+            sb.AppendLine();
+            sb.AppendLine("| Metric        | LaserQuote      | PEP             |");
+            sb.AppendLine("|---------------|-----------------|-----------------|");
+            sb.AppendLine($"| Width (in)    | {result?.LaserQuote?.Width,15:F4} | {result?.Pep?.Width,15:F4} |");
+            sb.AppendLine($"| Height (in)   | {result?.LaserQuote?.Height,15:F4} | {result?.Pep?.Height,15:F4} |");
+            sb.AppendLine($"| Cut Length    | {result?.LaserQuote?.CutLength,15:F3} | {result?.Pep?.CutLength,15:F3} |");
+            sb.AppendLine($"| Entity Count  | {result?.LaserQuote?.EntityCount,15} | {result?.Pep?.EntityCount,15} |");
+            return sb.ToString();
+        }
+        catch (Exception ex)
+        {
+            return $"Error calling LaserQuote API: {ex.Message}";
+        }
+    }
+
+    private record GeometryMetricDto(double Width, double Height, double CutLength, int EntityCount);
+    private record GeometryCompareResult(
+        bool IsMatch,
+        GeometryMetricDto? LaserQuote,
+        GeometryMetricDto? Pep,
+        double PixelDiffPercent,
+        string? AlignmentLabel,
+        string? Error);
 }

PepMcp/Program.cs

@@ -8,4 +8,7 @@ builder.Services
     .WithTools<PepTools>();
 
 var app = builder.Build();
+
+PepTools.LaserQuoteBaseUrl = builder.Configuration["LaserQuoteBaseUrl"] ?? "http://localhost:5260";
+
 await app.RunAsync();

PepMcp/appsettings.json

@@ -0,0 +1,3 @@
+{
+  "LaserQuoteBaseUrl": "http://localhost:5260"
+}