[wasm] add new interop to the console template (#72375)

* first try for wasm console template

* removed unnecessary references

* modified initial .csproj file

* Delete console.csproj

* solved formatting and fixed failing test

* solved failing tests

* fixed styling

* simplified updating of Program.cs

* removed unnecessary files

* used string.replace instead of regex

Co-authored-by: Stefan Pahontu <[email protected]>

Author: alinpahontu2912

src/mono/wasm/templates/templates/console/Program.cs

@@ -1,3 +1,17 @@
 using System;
+using System.Runtime.InteropServices.JavaScript;
 
 Console.WriteLine("Hello, Console!");
+
+public partial class MyClass
+{
+    [JSExport]
+    internal static string Greeting()
+    {
+        var text = $"Hello, World! Greetings from node version: {GetNodeVersion()}";
+        return text;
+    }
+
+    [JSImport("node.process.version")]
+    internal static partial string GetNodeVersion();
+}

src/mono/wasm/templates/templates/console/app-support.mjs

@@ -131,7 +131,7 @@ try {
     initRunArgs();
     mergeArguments();
 
-    createDotnetRuntime(({ MONO, INTERNAL, BINDING, Module }) => ({
+    createDotnetRuntime(({ MONO, INTERNAL, BINDING, IMPORTS, Module }) => ({
         disableDotnet6Compatibility: true,
         config: null,
         configSrc: "./mono-config.json",
@@ -166,7 +166,7 @@ try {
             if (runArgs.runtimeArgs.length > 0)
                 INTERNAL.mono_wasm_set_runtime_options(runArgs.runtimeArgs);
 
-            Object.assign(App, { MONO, BINDING, Module, runArgs });
+            Object.assign(App, { MONO, BINDING, IMPORTS, Module, runArgs });
 
             try {
                 if (App.main) {
@@ -190,4 +190,3 @@ try {
 catch (err) {
     set_exit_code(2, err);
 }
-

src/mono/wasm/templates/templates/console/console.0.csproj

@@ -9,6 +9,7 @@
     <OutputType>Exe</OutputType>
     <PublishTrimmed>true</PublishTrimmed>
     <WasmEmitSymbolMap Condition="'$(RunAOTCompilation)' != 'true'">true</WasmEmitSymbolMap>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
   </PropertyGroup>
 
   <ItemGroup>

src/mono/wasm/templates/templates/console/main.mjs

@@ -1,5 +1,16 @@
 import { App } from './app-support.mjs'
 
 App.main = async function (applicationArguments) {
+
+    App.IMPORTS.node = {
+        process : {
+            version: () => globalThis.process.version
+        }
+    };
+
+    const exports = await App.MONO.mono_wasm_get_assembly_exports("console.0.dll");
+    const text = exports.MyClass.Greeting();
+    console.log(text);
+
     await App.MONO.mono_run_main("console.0.dll", applicationArguments);
 }

src/tests/BuildWasmApps/Wasm.Build.Tests/WasmTemplateTests.cs

@@ -3,11 +3,14 @@
 
 using System;
 using System.IO;
+using System.Text;
 using System.Threading.Tasks;
+using System.Text.RegularExpressions;
 using Xunit;
 using Xunit.Abstractions;
 using Xunit.Sdk;
 
+
 #nullable enable
 
 namespace Wasm.Build.Tests
@@ -19,6 +22,19 @@ public WasmTemplateTests(ITestOutputHelper output, SharedBuildPerTestClassFixtur
         {
         }
 
+        private void updateProgramCS() {
+            string programText = """
+            Console.WriteLine("Hello, Console!");
+
+            for (int i = 0; i < args.Length; i ++)
+                Console.WriteLine ($"args[{i}] = {args[i]}");
+            """;
+            var path = Path.Combine(_projectDir!, "Program.cs");
+            string text = File.ReadAllText(path);
+            text = text.Replace(@"Console.WriteLine(""Hello, Console!"");", programText);
+            File.WriteAllText(path, text);
+        }
+
         [Theory]
         [InlineData("Debug")]
         [InlineData("Release")]
@@ -127,13 +143,7 @@ public void ConsoleBuildAndRun(string config)
             string projectFile = CreateWasmTemplateProject(id, "wasmconsole");
             string projectName = Path.GetFileNameWithoutExtension(projectFile);
 
-            string programText = """
-            using System;
-
-            for (int i = 0; i < args.Length; i ++)
-                Console.WriteLine ($"args[{i}] = {args[i]}");
-            """;
-            File.WriteAllText(Path.Combine(_projectDir!, "Program.cs"), programText);
+            updateProgramCS();
 
             var buildArgs = new BuildArgs(projectName, config, false, id, null);
             buildArgs = ExpandBuildArgs(buildArgs);
@@ -169,13 +179,8 @@ public void ConsolePublishAndRun(string config, bool aot)
             string projectFile = CreateWasmTemplateProject(id, "wasmconsole");
             string projectName = Path.GetFileNameWithoutExtension(projectFile);
 
-            string programText = """
-            using System;
-
-            for (int i = 0; i < args.Length; i ++)
-                Console.WriteLine ($"args[{i}] = {args[i]}");
-            """;
-            File.WriteAllText(Path.Combine(_projectDir!, "Program.cs"), programText);
+            updateProgramCS();
+            
             if (aot)
                 AddItemsPropertiesToProject(projectFile, "<RunAOTCompilation>true</RunAOTCompilation>");