From 9fcde9d5cee487782d8e9cf3914a032e99ffb8d6 Mon Sep 17 00:00:00 2001
From: bojancrevar <bojan.crevar@gorules.io>
Date: Mon, 23 Feb 2026 09:41:36 +0100
Subject: [PATCH] C# CI

---
 .github/workflows/uniffi.yaml                 | 56 ++++++++++++++++++
 bindings/uniffi/.gitignore                    |  2 +
 .../csharp/GoRules/ZenEngine/JsonBuffer.cs    | 23 ++++++++
 .../uniffi/nuget/GoRules.ZenEngine.csproj     | 58 +++++++++++++++++++
 .../uniffi/scripts/fix-csharp-bindings.sh     | 38 ++++++++++++
 5 files changed, 177 insertions(+)
 create mode 100644 bindings/uniffi/lib/csharp/GoRules/ZenEngine/JsonBuffer.cs
 create mode 100644 bindings/uniffi/nuget/GoRules.ZenEngine.csproj
 create mode 100755 bindings/uniffi/scripts/fix-csharp-bindings.sh

diff --git a/.github/workflows/uniffi.yaml b/.github/workflows/uniffi.yaml
index b4193941..fa231c2b 100644
--- a/.github/workflows/uniffi.yaml
+++ b/.github/workflows/uniffi.yaml
@@ -137,6 +137,62 @@ jobs:
         run: ./gradlew publishMavenKotlinPublicationToCentralPortal publishMavenJavaPublicationToCentralPortal
 
 
+  release-csharp:
+    runs-on: ubuntu-latest
+    needs: [ build ]
+    if: "startsWith(github.event.head_commit.message, 'chore(release): publish uniffi')"
+    defaults:
+      run:
+        working-directory: ${{ env.UNIFFI_DIRECTORY }}
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Setup .NET SDK
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: '8.0.x'
+
+      - name: Setup Rust Toolchain
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: Download all artifacts
+        uses: actions/download-artifact@v4
+        with:
+          path: build/generated/resources
+
+      - name: Move artifacts
+        run: mv ../../build ./
+
+      - name: Install uniffi-bindgen-cs
+        run: cargo install uniffi-bindgen-cs --git https://github.com/aspect-build/uniffi-bindgen-cs --tag v0.10.0+v0.29.4
+
+      - name: Generate C# bindings
+        run: |
+          uniffi-bindgen-cs \
+            --library build/generated/resources/darwin-x86-64/libzen_uniffi.dylib \
+            --out-dir build/generated/csharp
+
+      - name: Fix async callback interfaces
+        run: bash scripts/fix-csharp-bindings.sh build/generated/csharp/zen_uniffi.cs
+
+      - name: Extract version from Cargo.toml
+        id: version
+        run: |
+          VERSION=$(grep '^version' Cargo.toml | head -1 | sed 's/.*"\(.*\)".*/\1/')
+          echo "VERSION=$VERSION" >> $GITHUB_ENV
+          echo "Detected version: $VERSION"
+
+      - name: Pack NuGet package
+        run: dotnet pack nuget/GoRules.ZenEngine.csproj -c Release -p:Version=$VERSION
+
+      - name: Push to NuGet.org
+        run: |
+          dotnet nuget push nuget/bin/Release/*.nupkg \
+            --api-key ${{ secrets.NUGET_API_KEY }} \
+            --source https://api.nuget.org/v3/index.json \
+            --skip-duplicate
+
   build-ios:
     if: "!contains(github.event.head_commit.message, 'skip ci')"
     env:
diff --git a/bindings/uniffi/.gitignore b/bindings/uniffi/.gitignore
index 6eb8b6a7..dd20902a 100644
--- a/bindings/uniffi/.gitignore
+++ b/bindings/uniffi/.gitignore
@@ -1,3 +1,5 @@
 .idea
 .gradle
 build/
+build-android/
+jniLibs/
\ No newline at end of file
diff --git a/bindings/uniffi/lib/csharp/GoRules/ZenEngine/JsonBuffer.cs b/bindings/uniffi/lib/csharp/GoRules/ZenEngine/JsonBuffer.cs
new file mode 100644
index 00000000..d63fc8d6
--- /dev/null
+++ b/bindings/uniffi/lib/csharp/GoRules/ZenEngine/JsonBuffer.cs
@@ -0,0 +1,23 @@
+namespace GoRules.ZenEngine;
+
+using System.Text;
+
+public class JsonBuffer
+{
+    public byte[] Value { get; }
+
+    public JsonBuffer(byte[] value)
+    {
+        Value = value;
+    }
+
+    public JsonBuffer(string json)
+    {
+        Value = Encoding.UTF8.GetBytes(json);
+    }
+
+    public override string ToString()
+    {
+        return Encoding.UTF8.GetString(Value);
+    }
+}
diff --git a/bindings/uniffi/nuget/GoRules.ZenEngine.csproj b/bindings/uniffi/nuget/GoRules.ZenEngine.csproj
new file mode 100644
index 00000000..3c9b0d27
--- /dev/null
+++ b/bindings/uniffi/nuget/GoRules.ZenEngine.csproj
@@ -0,0 +1,58 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <PackageId>GoRules.ZenEngine</PackageId>
+    <Authors>GoRules</Authors>
+    <Description>ZEN Engine - Business Rules Engine for .NET. Execute JSON Decision Models (JDM) with native performance via Rust FFI bindings.</Description>
+    <PackageLicenseExpression>MIT</PackageLicenseExpression>
+    <PackageProjectUrl>https://github.com/gorules/zen</PackageProjectUrl>
+    <RepositoryUrl>https://github.com/gorules/zen</RepositoryUrl>
+    <PackageTags>rules-engine;business-rules;decision-engine;jdm;gorules</PackageTags>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+    <GenerateDocumentationFile>true</GenerateDocumentationFile>
+    <NoWarn>$(NoWarn);CS1591</NoWarn>
+  </PropertyGroup>
+
+  <!-- C# source files (generated + custom) -->
+  <ItemGroup>
+    <Compile Include="../build/generated/csharp/zen_uniffi.cs" Link="zen_uniffi.cs" />
+    <Compile Include="../lib/csharp/GoRules/ZenEngine/JsonBuffer.cs" Link="JsonBuffer.cs" />
+  </ItemGroup>
+
+  <!-- Native libraries for each platform (NuGet RID layout) -->
+  <ItemGroup>
+    <!-- macOS x64 -->
+    <None Include="../build/generated/resources/darwin-x86-64/libzen_uniffi.dylib"
+          Pack="true"
+          PackagePath="runtimes/osx-x64/native/"
+          Visible="false" />
+
+    <!-- macOS arm64 -->
+    <None Include="../build/generated/resources/darwin-aarch64/libzen_uniffi.dylib"
+          Pack="true"
+          PackagePath="runtimes/osx-arm64/native/"
+          Visible="false" />
+
+    <!-- Linux x64 -->
+    <None Include="../build/generated/resources/linux-x86-64/libzen_uniffi.so"
+          Pack="true"
+          PackagePath="runtimes/linux-x64/native/"
+          Visible="false" />
+
+    <!-- Linux arm64 -->
+    <None Include="../build/generated/resources/linux-aarch64/libzen_uniffi.so"
+          Pack="true"
+          PackagePath="runtimes/linux-arm64/native/"
+          Visible="false" />
+
+    <!-- Windows x64 -->
+    <None Include="../build/generated/resources/win32-x86-64/zen_uniffi.dll"
+          Pack="true"
+          PackagePath="runtimes/win-x64/native/"
+          Visible="false" />
+  </ItemGroup>
+
+</Project>
diff --git a/bindings/uniffi/scripts/fix-csharp-bindings.sh b/bindings/uniffi/scripts/fix-csharp-bindings.sh
new file mode 100755
index 00000000..fd164418
--- /dev/null
+++ b/bindings/uniffi/scripts/fix-csharp-bindings.sh
@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+#
+# fix-csharp-bindings.sh
+#
+# Fixes the async callback interface bug in C# bindings generated by uniffi-bindgen-cs.
+#
+# The generator produces sync interface methods (returning T directly) but the
+# calling code uses await + .WaitAsync(), causing compilation errors. This script
+# patches the interface method signatures to return Task<T> instead.
+#
+# Usage: ./fix-csharp-bindings.sh <path-to-zen_uniffi.cs>
+
+set -euo pipefail
+
+if [ $# -ne 1 ]; then
+    echo "Usage: $0 <path-to-zen_uniffi.cs>"
+    exit 1
+fi
+
+FILE="$1"
+
+if [ ! -f "$FILE" ]; then
+    echo "Error: File not found: $FILE"
+    exit 1
+fi
+
+echo "Fixing async callback interfaces in $FILE..."
+
+# Fix ZenCustomNodeCallback.Handle: sync → async (Task<>)
+sed -i.bak 's/ZenEngineHandlerResponse Handle(ZenEngineHandlerRequest @key)/Task<ZenEngineHandlerResponse> Handle(ZenEngineHandlerRequest @key)/' "$FILE"
+
+# Fix ZenDecisionLoaderCallback.Load: sync → async (Task<>)
+sed -i.bak 's/JsonBuffer? Load(string @key)/Task<JsonBuffer?> Load(string @key)/' "$FILE"
+
+# Clean up backup file
+rm -f "${FILE}.bak"
+
+echo "Done. Fixed async interfaces in $FILE"