Added a respond function and status code definitions

packages/webserver/src/index.ts

@@ -1,5 +1,6 @@
 export * from "./RouteRegisterFactory";
 export * from "./middleware";
 export * from "./requests";
+export * from "./response";
 export * from "./RouteRegisterFactory";
 export * from "./WebServerService";

packages/webserver/src/response/index.ts

@@ -0,0 +1,59 @@
+import { FastifyReply } from "fastify";
+
+/**
+ * The basic response schema
+ */
+export interface IResponse<T> {
+	result?: T,
+	status : string
+}
+
+/**
+ * Supported status codes
+ */
+export enum Status {
+	Ok                  = 200,
+	BadRequest          = 400,
+	Unauthorized        = 401,
+	Forbidden           = 403,
+	Conflict            = 409,
+	PayloadTooLarge     = 413,
+	UnprocessableEntity = 422
+}
+
+/**
+ * Create a response
+ */
+function createResponse<T = any>(status: Status, result?: T): IResponse<T> {
+	switch(status) {
+		case Status.Ok:
+			return { result, status: "OK" };
+		case Status.BadRequest:
+			return { result, status: "Bad Request" };
+		case Status.Unauthorized:
+			return { result, status: "Unauthorized" }
+		case Status.Forbidden:
+			return { result, status: "Forbidden" }
+		case Status.Conflict:
+			return { result, status: "Conflict" }
+		case Status.Conflict:
+			return { result, status: "Payload Too Large" }
+		case Status.UnprocessableEntity:
+			return { result, status: "Unprocessable Entity" }
+	}
+	throw new Error(`Unknown response code: ${status}`);
+}
+
+/**
+ *  Respond to a request
+ */
+export function respond<T = any>(reply: FastifyReply, status: Status, result?: T) {
+	try {
+		let response = createResponse(status, result);
+		reply.status(status);
+		reply.send(response);
+	} catch(e) {
+		reply.status(500);
+		reply.send({ status: "Internal Server Error" });
+	}
+}