Adding C# Support. Badly tested currently, but kindof working

.gitignore

@@ -1,5 +1,10 @@
 node_modules/
 .yarn/cache
 .yarn/install-state.gz
-examples/out
+examples/Typescript/out
+examples/CSharp/Generated
+examples/CSharp/Example/bin
+examples/CSharp/Example/obj
 examples/definition.json
+templates/CSharp/bin
+templates/CSharp/obj

.vscode/launch.json

@@ -0,0 +1,19 @@
+{
+   // Use IntelliSense to learn about possible attributes.
+   // Hover to view descriptions of existing attributes.
+   // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+   "version": "0.2.0",
+   "configurations": [
+      {
+         "name": ".NET Core Launch (console)",
+         "type": "coreclr",
+         "request": "launch",
+         // "preLaunchTask": "build",
+         "program": "${workspaceFolder}/examples/CSharp_Example/bin/Debug/net6.0/CSharp_Example.dll",
+         "args": [],
+         "cwd": "${workspaceFolder}",
+         "console": "internalConsole",
+         "stopAtEntry": false
+      }
+   ]
+}

examples/CSharp/Example/CSharp_Example.csproj

@@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <ItemGroup>
+    <ProjectReference Include="..\Generated\Example.csproj" />
+  </ItemGroup>
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

examples/CSharp/Example/Program.cs

@@ -0,0 +1,94 @@
+// See https://aka.ms/new-console-template for more information
+using Example;
+using System.Text;
+using System.Text.Json;
+using System.Text.Json.Nodes;
+
+class TestSrvimpl : Example.TestServiceServer<int> {
+   public TestSrvimpl(): base() {}
+   public override async Task<Example.AddValueResponse> AddValuesSingleParam(AddValueRequest request, int ctx) {
+      var res = new Example.AddValueResponse();
+      res.value = 1;
+      return res;
+   }
+
+   public override async Task<double> AddValuesMultipleParams(double value1,double value2,int ctx) {
+      return value1 + value2;
+   }
+
+   public override async Task ReturningVoid(double param1,int ctx) {
+      
+   }
+
+   public override void OnEvent(string param1,int ctx) {
+      Console.WriteLine($"OnEvent {param1}");
+   }
+
+   public override async Task<IList<double>> FunctionWithArrayAsParamAndReturn(List<double> values1,List<double> values2, int ctx) {
+      var l = new List<double>();
+      l.Append(1);
+      return l;
+   }
+
+   public override async Task ThrowingError(int ctx)  {
+      throw new Exception("This is a remote error :)");
+   }
+
+}
+
+class CopyTransportS2 : Example.JRpcTransport {
+   CopyTransportS1 tr1;
+   public Queue<string> backlog = new Queue<string>();
+
+   public CopyTransportS2(CopyTransportS1 tr1) {
+      this.tr1 = tr1;
+   }
+
+   public override Task Write(string data) {
+      Console.WriteLine("--> " + data);
+      this.tr1.DevSendPacket(data);
+
+      return Task.CompletedTask;
+   }
+}
+
+class CopyTransportS1 : Example.JRpcTransport {
+   public Queue<string> backlog = new Queue<string>();
+
+   public CopyTransportS2 tr2;
+
+   public CopyTransportS1() {
+      this.tr2 = new CopyTransportS2(this);
+   }
+
+   public override Task Write(string data) {
+      Console.WriteLine("<-- " + data);
+      this.tr2.DevSendPacket(data);
+      return Task.CompletedTask;
+   }
+}
+
+class Program {
+   public static void Main() {
+      Program.Start().Wait();
+   }
+
+   public static async Task Start() {
+      var server = new Example.JRpcServer<int>();
+      server.AddService("TestService", new TestSrvimpl());
+      var transport = new CopyTransportS1();
+
+      var sess = server.GetSession(transport, 0);
+      var client = new Example.JRpcClient(transport.tr2);
+      var testService = new Example.TestServiceClient(client);
+
+      var result = await testService.AddValuesMultipleParams(1,2);
+
+      Console.WriteLine($"Add 1 + 2 = {result}");
+
+      await testService.ThrowingError();
+   }
+}
+
+
+

examples/Typescript/test.ts

@@ -44,6 +44,10 @@ class TestService extends Server.TestService<undefined> {
    async FunctionWithArrayAsParamAndReturn(vals1, vals2) {
       return [...vals1, ...vals2];
    }
+
+   async ThrowingError(ctx: undefined): Promise<void> {
+      throw new Error("Remote error!");
+   }
 }
 
 server.addService(new TestService());

examples/example.jrpc

@@ -1,5 +1,7 @@
 import "./import";
 
+define CSharp_Namespace Example;
+
 enum TestEnum {
    VAL1,
    VAL2,
@@ -44,6 +46,8 @@ service TestService {
    @Param("param1", "Parameter with some string for event")
    notification OnEvent(param1: string);
 
+   ThrowingError(): void;
+
 
    FunctionWithArrayAsParamAndReturn(values1: number[], values2: number[]): number[];
 }

package.json

@@ -6,7 +6,10 @@
    "packageManager": "yarn@3.1.1",
    "scripts": {
       "start": "ts-node src/index.ts",
-      "test": "npm run start -- compile examples/example.jrpc --definition=examples/definition.json -o=ts-node:examples/out && ts-node examples/test.ts",
+      "test-start": "npm run start -- compile examples/example.jrpc --definition=examples/definition.json -o=ts-node:examples/Typescript/out -o=c#:examples/CSharp/Generated",
+      "test-csharp": "cd examples/CSharp/Example/ && dotnet run",
+      "test-typescript": "ts-node examples/test.ts",
+      "test": "npm run test-start && npm run test-csharp && npm run test-typescript",
       "build": "esbuild src/index.ts --bundle --platform=node --target=node14 --outfile=lib/jrpc.js",
       "prepublishOnly": "npm run build"
    },
@@ -22,6 +25,7 @@
    ],
    "devDependencies": {
       "@types/debug": "^4.1.7",
+      "@types/fs-extra": "^9.0.13",
       "@types/node": "^17.0.5",
       "@types/prettier": "^2.4.2",
       "@types/yargs": "^17.0.8",
@@ -32,5 +36,8 @@
       "ts-node": "^10.4.0",
       "typescript": "^4.5.4",
       "yargs": "^17.3.1"
+   },
+   "dependencies": {
+      "fs-extra": "^10.0.0"
    }
 }

src/compile.ts

@@ -1,4 +1,5 @@
 import * as FS from "fs";
+import * as FSE from "fs-extra"
 import * as Path from "path";
 import {
    EnumDefinition,
@@ -8,9 +9,9 @@ import {
    TypeDefinition,
 } from "./ir";
 
-export abstract class CompileTarget {
+export abstract class CompileTarget<T = any> {
    abstract name: string;
-   constructor(private outputFolder: string) {
+   constructor(private outputFolder: string, protected options: T) {
       if (!FS.existsSync(outputFolder)) {
          FS.mkdirSync(outputFolder, {
             recursive: true,
@@ -57,6 +58,14 @@ export abstract class CompileTarget {
 
       return res.join("\n");
    }
+
+   protected loadTemplateFolder(name:string) {
+      let root = Path.join(__dirname, "../templates/", name);
+      
+      FSE.copySync(root, this.outputFolder, {
+
+      });
+   }
 }
 
 export default function compile(ir: IR, target: CompileTarget) {
@@ -64,12 +73,12 @@ export default function compile(ir: IR, target: CompileTarget) {
 
    // setState("Building for target: " + target.name);
    target.start();
-   ir.forEach((step) => {
+   ir.steps.forEach((step) => {
       const [type, def] = step;
       if (type == "type") target.generateType(def as TypeDefinition);
       else if (type == "enum") target.generateEnum(def as EnumDefinition);
       else if (type == "service")
          target.generateService(def as ServiceDefinition);
    });
-   if (target.finalize) target.finalize(ir);
+   if (target.finalize) target.finalize(ir.steps);
 }

src/ir.ts

@@ -61,7 +61,10 @@ export type Step = [
    TypeDefinition | EnumDefinition | ServiceDefinition
 ];
 
-export type IR = Step[];
+export type IR = {
+   options: { [key:string]: string},
+   steps: Step[]
+};
 
 export default function get_ir(parsed: Parsed): IR {
    log("Generatie IR from parse output");
@@ -72,6 +75,7 @@ export default function get_ir(parsed: Parsed): IR {
    // Verifiy and generating steps
 
    let steps: Step[] = [];
+   let options = {} as any;
 
    parsed.forEach((statement) => {
       log("Working on statement of type %s", statement.type);
@@ -276,10 +280,15 @@ export default function get_ir(parsed: Parsed): IR {
                functions,
             } as ServiceDefinition,
          ]);
+      } else if(statement.type == "define") {
+         options[statement.key] = statement.value;
       } else {
          throw new IRError(statement, "Invalid statement!");
       }
    });
 
-   return steps;
+   return {
+      options,
+      steps
+   };
 }

src/parser.ts

@@ -67,11 +67,19 @@ export interface ServiceStatement extends DefinitionNode {
    functions: ServiceFunctionStatement[];
 }
 
+export interface DefineStatement extends DefinitionNode {
+   type: "define";
+   key: string;
+   value: string;
+}
+
 export type RootStatementNode =
    | ImportStatement
    | TypeStatement
    | ServiceStatement
-   | EnumStatement;
+   | EnumStatement
+   | DefineStatement;
+
 export type StatementNode =
    | RootStatementNode
    | TypeFieldStatement
@@ -414,6 +422,22 @@ export default function parse(tokens: Token[], file: string): Parsed {
       };
    };
 
+   const parseDefine = (): DefineStatement => {
+      const idx = eatToken("define");
+
+      let [key] = eatText()
+      let [value] = eatText()
+
+      eatToken(";");
+
+      return {
+         type :"define",
+         location: {file, idx},
+         key,
+         value
+      }
+   }
+
    const parseStatement = () => {
       if (currentToken.type === "keyword") {
          switch (currentToken.value) {
@@ -427,6 +451,8 @@ export default function parse(tokens: Token[], file: string): Parsed {
                return parseEnumStatement();
             case "service":
                return parseServiceStatement();
+            case "define":
+               return parseDefine();
             default:
                throw new ParserError(
                   `Unknown keyword ${currentToken.value}`,

src/process.ts

@@ -6,18 +6,21 @@ import tokenize, { TokenizerError } from "./tokenizer";
 import parse, { Parsed, ParserError } from "./parser";
 import get_ir, { IR, IRError } from "./ir";
 import compile, { CompileTarget } from "./compile";
-import { ESMTypescriptTarget, NodeJSTypescriptTarget } from "./targets/typescript";
+import {
+   ESMTypescriptTarget,
+   NodeJSTypescriptTarget,
+} from "./targets/typescript";
+import { CSharpTarget } from "./targets/csharp";
 
 class CatchedError extends Error {}
 
 const log = dbg("app");
 
+const Targets = new Map<string, typeof CompileTarget>();
 
-const Targets = new Map<string,typeof CompileTarget>();
+Targets.set("ts-esm", ESMTypescriptTarget);
-
+Targets.set("ts-node", NodeJSTypescriptTarget);
-Targets.set("ts-esm", ESMTypescriptTarget)
+Targets.set("c#", CSharpTarget as typeof CompileTarget);
-Targets.set("ts-node", NodeJSTypescriptTarget)
-
 
 function indexToLineAndCol(src: string, index: number) {
    let line = 1;
@@ -77,7 +80,11 @@ type ProcessContext = {
    processedFiles: Set<string>;
 };
 
-function processFile(ctx: ProcessContext, file: string, root = false): Parsed | null {
+function processFile(
+   ctx: ProcessContext,
+   file: string,
+   root = false
+): Parsed | null {
    file = Path.resolve(file);
    if (ctx.processedFiles.has(file)) {
       log("Skipping file %s since it has already be processed", file);
@@ -99,7 +106,9 @@ function processFile(ctx: ProcessContext, file: string, root = false): Parsed |
          .map((statement) => {
             if (statement.type == "import") {
                const base = Path.dirname(file);
-               const resolved = Path.resolve(Path.join(base, statement.path + ".jrpc"));
+               const resolved = Path.resolve(
+                  Path.join(base, statement.path + ".jrpc")
+               );
                return processFile(ctx, resolved);
             } else {
                return statement;
@@ -111,16 +120,14 @@ function processFile(ctx: ProcessContext, file: string, root = false): Parsed |
    } catch (err) {
       if (err instanceof TokenizerError) {
          printError(err, file, err.index);
-         if(!root)
+         if (!root) throw new CatchedError();
-            throw new CatchedError();
       } else if (err instanceof ParserError) {
          printError(err, file, err.token.startIdx);
-         if(!root)
+         if (!root) throw new CatchedError();
-            throw new CatchedError();
+      } else if (root && err instanceof CatchedError) {
-      } else if(root && err instanceof CatchedError) {
          return null;
       } else {
-         throw err;     
+         throw err;
       }
    }
 }
@@ -132,18 +139,21 @@ export default function startCompile(options: CompileOptions) {
    } as ProcessContext;
 
    let ir: IR | undefined = undefined;
-   if(options.input.endsWith(".json")) {
+   if (options.input.endsWith(".json")) {
       ir = JSON.parse(FS.readFileSync(options.input, "utf-8"));
    } else {
       const parsed = processFile(ctx, options.input, true);
 
-      if(!parsed)
+      if (!parsed) process.exit(1); // Errors should have already been emitted
-         process.exit(1); // Errors should have already been emitted
       try {
-      ir = get_ir(parsed);
+         ir = get_ir(parsed);
-      } catch(err) {
+      } catch (err) {
-         if(err instanceof IRError) {
+         if (err instanceof IRError) {
-            printError(err, err.statement.location.file, err.statement.location.idx); 
+            printError(
+               err,
+               err.statement.location.file,
+               err.statement.location.idx
+            );
             process.exit(1);
          } else {
             throw err;
@@ -151,23 +161,25 @@ export default function startCompile(options: CompileOptions) {
       }
    }
 
-   if(!ir)
+   if (!ir) throw new Error("Error compiling: Cannot get IR");
-      throw new Error("Error compiling: Cannot get IR");
 
-   if(options.emitDefinitions) {
+   if (options.emitDefinitions) {
-      FS.writeFileSync(options.emitDefinitions, JSON.stringify(ir, undefined, 3));
+      FS.writeFileSync(
+         options.emitDefinitions,
+         JSON.stringify(ir, undefined, 3)
+      );
    }
 
-   if(options.targets.length <= 0) {
+   if (options.targets.length <= 0) {
       console.log(Color.yellow("WARNING:"), "No targets selected!");
    }
 
-   options.targets.forEach(target => {
+   options.targets.forEach((target) => {
-      const tg = Targets.get(target.type) as any
+      const tg = Targets.get(target.type) as any;
-      if(!tg) {
+      if (!tg) {
          console.log(Color.red("ERROR:"), "Target not supported!");
          return;
       }
-      compile(ir, new tg(target.output));
+      compile(ir, new tg(target.output, ir.options));
-   })
+   });
 }

src/targets/csharp.ts

@@ -0,0 +1,328 @@
+import {
+   TypeDefinition,
+   ServiceDefinition,
+   EnumDefinition,
+   TypeFieldDefinition,
+   Step,
+} from "../ir";
+
+import { CompileTarget } from "../compile";
+
+type lineAppender = (ind: number, line: string | string[]) => void;
+
+const conversion = {
+   boolean: "bool",
+   number: "double",
+   string: "string",
+   void: "void",
+};
+
+function toCSharpType(type: string): string {
+   return (conversion as any)[type] || type;
+}
+
+export class CSharpTarget extends CompileTarget<{ CSharp_Namespace: string }> {
+   name: string = "c#";
+
+   get namespace() {
+      return this.options.CSharp_Namespace || "JRPC";
+   }
+
+   start(): void {
+      this.writeFile(
+         this.namespace + ".csproj",
+         this.getTemplate("CSharp/CSharp.csproj")
+      );
+
+      const fixNS = (input: string) =>
+         input.replace("__NAMESPACE__", this.namespace);
+      const copyClass = (name: string) =>
+         this.writeFile(
+            name + ".cs",
+            fixNS(this.getTemplate(`CSharp/${name}.cs`))
+         );
+      copyClass("JRpcClient");
+      copyClass("JRpcServer");
+      copyClass("JRpcTransport");
+   }
+
+   generateType(definition: TypeDefinition): void {
+      let lines: string[] = [];
+      const a: lineAppender = (i, t) => {
+         if (!Array.isArray(t)) {
+            t = [t];
+         }
+         t.forEach((l) => lines.push("   ".repeat(i) + l.trim()));
+      };
+
+      a(0, `using System.Text.Json;`);
+      a(0, `using System.Text.Json.Serialization;`);
+      a(0, `using System.Collections.Generic;`);
+      a(0, ``);
+      a(0, `namespace ${this.namespace};`);
+      a(0, ``);
+      a(0, `public class ${definition.name} {`);
+      for (const field of definition.fields) {
+         if (field.array) {
+            a(
+               1,
+               `public IList<${toCSharpType(field.type)}>? ${
+                  field.name
+               } { get; set; }`
+            );
+         } else if (field.map) {
+            a(
+               1,
+               `public Dictionary<${toCSharpType(field.map)}, ${toCSharpType(
+                  field.type
+               )}>? ${field.name} { get; set; }`
+            );
+         } else {
+            a(
+               1,
+               `public ${toCSharpType(field.type)}? ${field.name} { get; set; }`
+            );
+         }
+      }
+      a(0, `}`);
+
+      this.writeFile(`${definition.name}.cs`, lines.join("\n"));
+   }
+
+   generateEnum(definition: EnumDefinition): void {
+      let lines: string[] = [];
+      const a: lineAppender = (i, t) => {
+         if (!Array.isArray(t)) {
+            t = [t];
+         }
+         t.forEach((l) => lines.push("   ".repeat(i) + l.trim()));
+      };
+
+      a(0, `using System.Text.Json;`);
+      a(0, `using System.Text.Json.Serialization;`);
+      a(0, ``);
+      a(0, `namespace ${this.namespace};`);
+      a(0, ``);
+      a(0, `public enum ${definition.name} {`);
+      for (const field of definition.values) {
+         a(1, `${field.name} = ${field.value},`);
+      }
+      a(0, `}`);
+
+      this.writeFile(`${definition.name}.cs`, lines.join("\n"));
+   }
+
+   generateServiceClient(definition: ServiceDefinition) {
+      let lines: string[] = [];
+      const a: lineAppender = (i, t) => {
+         if (!Array.isArray(t)) {
+            t = [t];
+         }
+         t.forEach((l) => lines.push("   ".repeat(i) + l.trim()));
+      };
+
+      a(0, `using System.Text.Json;`);
+      a(0, `using System.Text.Json.Serialization;`);
+      a(0, `using System.Text.Json.Nodes;`);
+      a(0, `using System.Threading.Tasks;`);
+      a(0, ``);
+      a(0, `namespace ${this.namespace};`);
+      a(0, ``);
+      a(0, `public class ${definition.name}Client {`);
+      a(0, ``);
+      a(1, `private JRpcClient Client;`);
+      a(0, ``);
+      a(1, `public ${definition.name}Client(JRpcClient client) {`);
+      a(2, `this.Client = client;`);
+      a(1, `}`);
+      a(0, ``);
+      for (const fnc of definition.functions) {
+         let params = fnc.inputs
+            .map((inp) => {
+               if (inp.array) {
+                  return `List<${toCSharpType(inp.type)}> ${inp.name}`;
+               } else {
+                  return `${toCSharpType(inp.type)} ${inp.name}`;
+               }
+            })
+            .join(", ");
+
+         const genParam = () =>
+            a(
+               2,
+               `var param = new JsonArray(${fnc.inputs
+                  .map((e) => `JsonSerializer.SerializeToNode(${e.name})`)
+                  .join(", ")});`
+            );
+
+         if (fnc.return) {
+            if (fnc.return.type == "void") {
+               a(1, `public async Task ${fnc.name}(${params}) {`);
+               genParam();
+               a(
+                  2,
+                  `await this.Client.SendRequestRaw("${definition.name}.${fnc.name}", param);`
+               );
+               a(1, `}`);
+            } else {
+               let ret = fnc.return
+                  ? fnc.return.array
+                     ? `IList<${toCSharpType(fnc.return.type)}>`
+                     : toCSharpType(fnc.return.type)
+                  : undefined;
+               a(1, `public async Task<${ret}> ${fnc.name}(${params}) {`);
+               genParam();
+               a(
+                  2,
+                  `return await this.Client.SendRequest<${ret}>("${definition.name}.${fnc.name}", param);`
+               );
+               a(1, `}`);
+            }
+         } else {
+            //Notification
+            a(1, `public void ${fnc.name}(${params}) {`);
+            genParam();
+            a(
+               2,
+               `this.Client.SendNotification("${definition.name}.${fnc.name}", param);`
+            );
+            a(1, `}`);
+         }
+         a(1, ``);
+      }
+      // a(0, ``);
+      // a(0, ``);
+      // a(0, ``);
+      a(0, `}`);
+
+      this.writeFile(`${definition.name}Client.cs`, lines.join("\n"));
+   }
+
+   generateServiceServer(definition: ServiceDefinition) {
+      let lines: string[] = [];
+      const a: lineAppender = (i, t) => {
+         if (!Array.isArray(t)) {
+            t = [t];
+         }
+         t.forEach((l) => lines.push("   ".repeat(i) + l.trim()));
+      };
+
+      a(0, `using System.Text.Json;`);
+      a(0, `using System.Text.Json.Serialization;`);
+      a(0, `using System.Text.Json.Nodes;`);
+      a(0, `using System.Threading.Tasks;`);
+      a(0, ``);
+      a(0, `namespace ${this.namespace};`);
+      a(0, ``);
+      a(
+         0,
+         `public abstract class ${definition.name}Server<TContext> : JRpcService<TContext> {`
+      );
+
+      a(0, ``);
+      a(1, `public ${definition.name}Server() {`);
+      for (const fnc of definition.functions) {
+         a(2, `this.RegisterFunction("${fnc.name}");`);
+      }
+      a(1, `}`);
+      a(0, ``);
+      for (const fnc of definition.functions) {
+         let params = [
+            ...fnc.inputs.map((inp) => {
+               if (inp.array) {
+                  return `List<${toCSharpType(inp.type)}> ${inp.name}`;
+               } else {
+                  return `${toCSharpType(inp.type)} ${inp.name}`;
+               }
+            }),
+            "TContext ctx",
+         ].join(", ");
+
+         if (fnc.return) {
+            if (fnc.return.type == "void") {
+               a(1, `public abstract Task ${fnc.name}(${params});`);
+            } else {
+               let ret = fnc.return
+                  ? fnc.return.array
+                     ? `IList<${toCSharpType(fnc.return.type)}>`
+                     : toCSharpType(fnc.return.type)
+                  : undefined;
+               a(1, `public abstract Task<${ret}> ${fnc.name}(${params});`);
+            }
+         } else {
+            a(1, `public abstract void ${fnc.name}(${params});`);
+         }
+      }
+      a(0, ``);
+      a(
+         1,
+         `public async override Task<JsonNode?> HandleRequest(string func, JsonNode param, TContext context) {`
+      );
+      a(2, `switch(func) {`);
+      for (const fnc of definition.functions) {
+         a(3, `case "${fnc.name}": {`);
+         a(4, `if(param is JsonObject) {`);
+         a(
+            5,
+            `var ja = new JsonArray(${fnc.inputs
+               .map((inp) => {
+                  return `param["${inp.name}"]`;
+               })
+               .join(", ")});`
+         );
+         a(5, `param = ja;`);
+         a(4, `}`);
+
+         let pref = "";
+         if (fnc.return) {
+            if (fnc.return.type != "void") pref = "var result = await ";
+            else pref = "await ";
+         }
+
+         a(
+            4,
+            pref +
+               `this.${fnc.name}(${[
+                  ...fnc.inputs.map((inp, idx) => {
+                     let type = inp.array
+                        ? `List<${toCSharpType(inp.type)}>`
+                        : `${toCSharpType(inp.type)}`;
+                     return `param[${idx}]!.Deserialize<${type}>()`;
+                  }),
+                  "context",
+               ].join(", ")});`
+         );
+
+         if (fnc.return && fnc.return.type != "void") {
+            // if(fnc.return.type == "void") {
+            //    a(3, `return null;`);
+            // } else {
+            //    a(3, ``);
+            // }
+            a(4, `return JsonSerializer.SerializeToNode(result);`);
+            // a(3, ``);
+         } else {
+            a(4, `return null;`);
+         }
+         a(3, `}`);
+         a(0, ``);
+      }
+      a(3, `default:`);
+      a(4, `throw new Exception("Invalid Method!");`);
+      // a(0, ``);
+      // a(0, ``);
+      // a(0, ``);
+      a(2, `}`);
+      a(1, `}`);
+      a(0, `}`);
+
+      this.writeFile(`${definition.name}Server.cs`, lines.join("\n"));
+   }
+
+   generateService(definition: ServiceDefinition): void {
+      this.generateServiceClient(definition);
+      this.generateServiceServer(definition);
+   }
+
+   finalize(steps: Step[]): void {}
+}

src/tokenizer.ts

@@ -57,7 +57,7 @@ const matcher = [
    regexMatcher(/^#.+/, "comment"),
    regexMatcher(/^".*?"/, "string"),
    // regexMatcher(/(?<=^")(.*?)(?=")/, "string"),
-   regexMatcher(/^(type|enum|import|service)\b/, "keyword"),
+   regexMatcher(/^(type|enum|import|service|define)\b/, "keyword"),
    regexMatcher(/^\@/, "at"),
    regexMatcher(/^\:/, "colon"),
    regexMatcher(/^\;/, "semicolon"),

templates/CSharp/CSharp.csproj

@@ -0,0 +1,9 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

templates/CSharp/JRpcClient.cs

@@ -0,0 +1,130 @@
+using System;
+using System.Text;
+using System.Text.Json;
+using System.Text.Json.Nodes;
+using System.Threading.Tasks;
+using System.Collections.Generic;
+
+namespace __NAMESPACE__;
+
+public class JRpcClient
+{
+   private JRpcTransport Transport;
+   private IDictionary<string, TaskCompletionSource<JsonNode?>> Requests;
+
+   public JRpcClient(JRpcTransport transport)
+   {
+      this.Transport = transport;
+      this.Requests = new Dictionary<string, TaskCompletionSource<JsonNode?>>();
+
+      this.Transport.OnPacket += this.HandlePacket;
+   }
+
+   private void HandlePacket(string packet)
+   {
+      try
+      {
+         var parsed = JsonNode.Parse(packet);
+         if (parsed == null || (string?)parsed["jsonrpc"] != "2.0")
+            return;
+
+         if (parsed["method"] != null)
+         { // Request or Notification
+            if (parsed["id"] != null) // Requests are not supported on the Client
+               return;
+            //TODO: implement Notifications
+         }
+         else if (parsed["id"] != null && parsed["method"] == null)
+         {
+            // Response
+            //TODO:  Somehow remove this warning, since it has no meaning in this context. 
+            //       ID has to be something, that was checked before
+            var id = (string)parsed["id"]!;
+
+            var task = this.Requests[id];
+            if (task == null)
+               return; //This Request was not from here
+
+            if (parsed["error"] != null)
+            {
+               var err = parsed["error"].Deserialize<JRpcError>();
+               if (err == null)
+               {
+                  task.SetException(new JRpcException("Internal Server Error"));
+               }
+               else
+               {
+                  task.SetException(err.ToException());
+               }
+            }
+            else
+            {
+               task.SetResult(parsed["result"]);
+            }
+         }
+         else
+         {
+            // Ignoring invalid packet!
+            return;
+         }
+      }
+      catch (Exception)
+      {
+         //TODO: Maybe log exception, but don't break!
+      }
+   }
+
+   public async Task<JsonNode?> SendRequestRaw(string method, JsonArray param)
+   {
+      var id = Guid.NewGuid().ToString();
+      var request = new JsonObject
+      {
+         ["jsonrpc"] = "2.0",
+         ["id"] = id,
+         ["method"] = method,
+         ["params"] = param
+      };
+
+      var task = new TaskCompletionSource<JsonNode?>();
+      this.Requests.Add(id, task);
+      await this.Transport.Write(request.ToJsonString());
+
+      return await task.Task;
+   }
+
+   public async Task<TResult?> SendRequest<TResult>(string method, JsonArray param)
+   {
+      var result = await this.SendRequestRaw(method, param);
+      return result.Deserialize<TResult>();
+   }
+
+   public async void SendNotification(string method, JsonArray param)
+   {
+      var not = new JsonObject
+      {
+         ["jsonrpc"] = "2.0",
+         ["method"] = method,
+         ["params"] = param,
+      };
+
+      await this.Transport.Write(not.ToJsonString());
+   }
+}
+
+
+class JRpcError
+{
+   public int code { get; set; }
+   public string? message { get; set; }
+   public JsonNode? data { get; set; }
+
+   public JRpcException ToException()
+   {
+      return new JRpcException(this.message!);
+   }
+}
+
+public class JRpcException : Exception
+{
+   public JRpcException(string message) : base(message) { }
+}

templates/CSharp/JRpcServer.cs

@@ -0,0 +1,196 @@
+using System;
+using System.Text;
+using System.Text.Json;
+using System.Text.Json.Nodes;
+using System.Threading.Tasks;
+using System.Collections.Generic;
+
+namespace __NAMESPACE__;
+
+public class JRpcServer<TContext>
+{
+   public IDictionary<string, JRpcService<TContext>> Services;
+
+   public JRpcServer()
+   {
+      this.Services = new Dictionary<string, JRpcService<TContext>>();
+   }
+
+   public void AddService(string name, JRpcService<TContext> service)
+   {
+      this.Services.Add(name, service);
+   }
+
+   public JRpcServerSession<TContext> GetSession(JRpcTransport transport, TContext context)
+   {
+      return new JRpcServerSession<TContext>(this, transport, context);
+   }
+}
+
+public class JRpcServerSession<TContext>
+{
+   JRpcServer<TContext> Server;
+   JRpcTransport Transport;
+   TContext Context;
+
+   public JRpcServerSession(JRpcServer<TContext> server, JRpcTransport transport, TContext context)
+   {
+      this.Server = server;
+      this.Transport = transport;
+      this.Context = context;
+
+      this.Transport.OnPacket += this.HandlePacket;
+   }
+
+   private void HandlePacket(string packet)
+   {
+      try
+      {
+         var parsed = JsonNode.Parse(packet);
+         if (parsed == null || (string?)parsed["jsonrpc"] != "2.0")
+            return;
+
+         if (parsed["method"] != null) // Request or Notification
+         {
+            var id = (string?)parsed["id"];
+            var splitted = ((string)parsed["method"]!).Split(".", 2);
+            var serviceName = splitted[0];
+            var functionName = splitted[1];
+
+            if (serviceName == null || functionName == null)
+            {
+               if (id != null)
+               {
+                  var response = new JsonObject
+                  {
+                     ["jsonrpc"] = "2.0",
+                     ["id"] = id,
+                     ["error"] = new JsonObject
+                     {
+                        ["code"] = -32700,
+                        ["message"] = "Method not found!",
+                     }
+                  };
+                  _ = this.Transport.Write(response.ToJsonString()!);
+               }
+               return;
+            }
+
+            var service = this.Server.Services[serviceName];
+            if (service == null)
+            {
+               if (id != null)
+               {
+                  var response = new JsonObject
+                  {
+                     ["jsonrpc"] = "2.0",
+                     ["id"] = id,
+                     ["error"] = new JsonObject
+                     {
+                        ["code"] = -32700,
+                        ["message"] = "Method not found!",
+                     }
+                  };
+                  _ = this.Transport.Write(response.ToJsonString()!);
+               }
+               return;
+            }
+
+            if (!service.Functions.Contains(functionName))
+            {
+               if (id != null)
+               {
+                  var response = new JsonObject
+                  {
+                     ["jsonrpc"] = "2.0",
+                     ["id"] = id,
+                     ["error"] = new JsonObject
+                     {
+                        ["code"] = -32700,
+                        ["message"] = "Method not found!",
+                     }
+                  };
+                  _ = this.Transport.Write(response.ToJsonString()!);
+               }
+               return;
+            }
+
+            if (!(parsed["params"] is JsonArray || parsed["params"] is JsonObject))
+            {
+               if (id != null)
+               {
+                  var response = new JsonObject
+                  {
+                     ["jsonrpc"] = "2.0",
+                     ["id"] = id,
+                     ["error"] = new JsonObject
+                     {
+                        ["code"] = -32602,
+                        ["message"] = "Invalid Parameters!",
+                     }
+                  };
+                  _ = this.Transport.Write(response.ToJsonString()!);
+               }
+               return;
+            }
+
+            _ = service.HandleRequest(functionName, parsed["params"]!, this.Context).ContinueWith(result =>
+            {
+               if (id != null)
+               {
+                  var response = new JsonObject
+                  {
+                     ["jsonrpc"] = "2.0",
+                     ["id"] = id,
+                     ["error"] = result.IsFaulted ? new JsonObject
+                     {
+                        ["code"] = -32603,
+                        ["message"] = result.Exception!.InnerException!.Message
+                     } : null,
+                     ["result"] = !result.IsFaulted ? result.Result : null,
+                  };
+                  _ = this.Transport.Write(response.ToJsonString()!);
+               }
+            });
+
+
+            //TODO: implement Notifications
+         }
+         else
+         {
+            // Ignoring everyting else. Don't care!
+            return;
+         }
+      }
+      catch (Exception)
+      {
+         //TODO: Maybe log exception, but don't break!
+      }
+   }
+
+
+   public async void SendNotification(string method, JsonArray param)
+   {
+      var not = new JsonObject
+      {
+         ["jsonrpc"] = "2.0",
+         ["method"] = method,
+         ["params"] = param,
+      };
+
+      await this.Transport.Write(not.ToJsonString());
+   }
+}
+
+public abstract class JRpcService<TContext>
+{
+   public HashSet<string> Functions = new HashSet<string>();
+
+   protected void RegisterFunction(string name)
+   {
+      this.Functions.Add(name);
+   }
+
+   public abstract Task<JsonNode?> HandleRequest(string function, JsonNode param, TContext context);
+   // public abstract Task HandleNotification(string notification, JsonNode param);
+}

templates/CSharp/JRpcTransport.cs

@@ -0,0 +1,14 @@
+using System.Threading.Tasks;
+
+namespace __NAMESPACE__;
+
+public delegate void NotifyPacket(string data);
+
+public abstract class JRpcTransport {
+   public event NotifyPacket OnPacket;
+   public abstract Task Write(string data);
+
+   public void DevSendPacket(string data) {
+      this.OnPacket.Invoke(data);
+   }
+}

templates/ts_service_base.ts

@@ -9,10 +9,10 @@ export const Logging = {
 
 export enum ErrorCodes {
    ParseError = -32700,
-   InvalidRequest = -32700,
+   InvalidRequest = -32600,
-   MethodNotFound = -32700,
+   MethodNotFound = -32601,
-   InvalidParams = -32700,
+   InvalidParams = -32602,
-   InternalError = -32700,
+   InternalError = -32603,
 }
 
 export interface RequestObject {

yarn.lock

@@ -26,12 +26,14 @@ __metadata:
   resolution: "@hibas123/jrpcgen@workspace:."
   dependencies:
     "@types/debug": ^4.1.7
+    "@types/fs-extra": ^9.0.13
     "@types/node": ^17.0.5
     "@types/prettier": ^2.4.2
     "@types/yargs": ^17.0.8
     chalk: 4
     debug: ^4.3.3
     esbuild: ^0.14.10
+    fs-extra: ^10.0.0
     prettier: ^2.5.1
     ts-node: ^10.4.0
     typescript: ^4.5.4
@@ -78,6 +80,15 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@types/fs-extra@npm:^9.0.13":
+  version: 9.0.13
+  resolution: "@types/fs-extra@npm:9.0.13"
+  dependencies:
+    "@types/node": "*"
+  checksum: add79e212acd5ac76b97b9045834e03a7996aef60a814185e0459088fd290519a3c1620865d588fa36c4498bf614210d2a703af5cf80aa1dbc125db78f6edac3
+  languageName: node
+  linkType: hard
+
 "@types/ms@npm:*":
   version: 0.7.31
   resolution: "@types/ms@npm:0.7.31"
@@ -85,6 +96,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@types/node@npm:*":
+  version: 17.0.8
+  resolution: "@types/node@npm:17.0.8"
+  checksum: f4cadeb9e602027520abc88c77142697e33cf6ac98bb02f8b595a398603cbd33df1f94d01c055c9f13cde0c8eaafc5e396ca72645458d42b4318b845bc7f1d0f
+  languageName: node
+  linkType: hard
+
 "@types/node@npm:^17.0.5":
   version: 17.0.5
   resolution: "@types/node@npm:17.0.5"
@@ -422,6 +440,17 @@ __metadata:
   languageName: node
   linkType: hard
 
+"fs-extra@npm:^10.0.0":
+  version: 10.0.0
+  resolution: "fs-extra@npm:10.0.0"
+  dependencies:
+    graceful-fs: ^4.2.0
+    jsonfile: ^6.0.1
+    universalify: ^2.0.0
+  checksum: 5285a3d8f34b917cf2b66af8c231a40c1623626e9d701a20051d3337be16c6d7cac94441c8b3732d47a92a2a027886ca93c69b6a4ae6aee3c89650d2a8880c0a
+  languageName: node
+  linkType: hard
+
 "get-caller-file@npm:^2.0.5":
   version: 2.0.5
   resolution: "get-caller-file@npm:2.0.5"
@@ -429,6 +458,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"graceful-fs@npm:^4.1.6, graceful-fs@npm:^4.2.0":
+  version: 4.2.9
+  resolution: "graceful-fs@npm:4.2.9"
+  checksum: 68ea4e07ff2c041ada184f9278b830375f8e0b75154e3f080af6b70f66172fabb4108d19b3863a96b53fc068a310b9b6493d86d1291acc5f3861eb4b79d26ad6
+  languageName: node
+  linkType: hard
+
 "has-flag@npm:^4.0.0":
   version: 4.0.0
   resolution: "has-flag@npm:4.0.0"
@@ -443,6 +479,19 @@ __metadata:
   languageName: node
   linkType: hard
 
+"jsonfile@npm:^6.0.1":
+  version: 6.1.0
+  resolution: "jsonfile@npm:6.1.0"
+  dependencies:
+    graceful-fs: ^4.1.6
+    universalify: ^2.0.0
+  dependenciesMeta:
+    graceful-fs:
+      optional: true
+  checksum: 7af3b8e1ac8fe7f1eccc6263c6ca14e1966fcbc74b618d3c78a0a2075579487547b94f72b7a1114e844a1e15bb00d440e5d1720bfc4612d790a6f285d5ea8354
+  languageName: node
+  linkType: hard
+
 "make-error@npm:^1.1.1":
   version: 1.3.6
   resolution: "make-error@npm:1.3.6"
@@ -558,6 +607,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"universalify@npm:^2.0.0":
+  version: 2.0.0
+  resolution: "universalify@npm:2.0.0"
+  checksum: 2406a4edf4a8830aa6813278bab1f953a8e40f2f63a37873ffa9a3bc8f9745d06cc8e88f3572cb899b7e509013f7f6fcc3e37e8a6d914167a5381d8440518c44
+  languageName: node
+  linkType: hard
+
 "wrap-ansi@npm:^7.0.0":
   version: 7.0.0
   resolution: "wrap-ansi@npm:7.0.0"