Add data validation to the config

server/src/main.ts

@@ -2,19 +2,11 @@
 import "module-alias/register";
 
 import startWebsocketServer from "./websocket";
+import { loadConfig } from "./utils/config";
 import { GameDB } from "./objects/GameDB";
 import { Logger } from "tslog";
-import toml from "toml";
-import fs from "fs";
 
-// load the config
-try {
-	var configData = toml.parse(fs.readFileSync("config.toml", "utf-8"));
-} catch {
-	console.error("Can't find config file. Exiting");
-	process.exit(1);
-};
-export const config: IConfig = configData;
+export const config: IConfig = loadConfig();
 
 // Define the logger
 export const log = new Logger({

server/src/utils/config.ts

@@ -0,0 +1,66 @@
+import { readFileSync } from "fs";
+import { log } from "@/main";
+import toml from "toml";
+import Joi from "joi";
+
+const schema = Joi.object({
+	game: Joi.object({
+		type: Joi
+			.string()
+			.allow(
+				`file:json`,
+				// `file:csv`,
+				// `web:json`,
+				// `web:csv`
+			)
+			.required()
+			.message(`Invalid deck type`),
+		location: Joi
+			.string()
+			.required()
+			.message(`The deck location must be a string`),
+	}),
+	server: Joi.object({
+		port: Joi
+			.number()
+			.port()
+			.required()
+			.message(`Invalid port number`),
+		cors: Joi.object({
+			origins: Joi
+				.array()
+				.items(Joi.string())
+				.message(`The CORS origins must be an array of strings`),
+		}),
+	}),
+	log: Joi.object({
+		level: Joi
+			.string()
+			.allow(
+				`silly`,
+				`trace`,
+				`debug`,
+				`info`,
+				`warn`,
+				`error`,
+				`fatal`
+			)
+			.optional()
+			.default(`info`)
+			.message(`Invalid log level`),
+	}),
+});
+
+export function loadConfig(): IConfig {
+	const data = toml.parse(readFileSync("config.toml", "utf-8"));
+	const { value, error } = schema.validate(data, {
+		abortEarly: false,
+	});
+
+	if (error) {
+		log.error(`Configuration object failed to validate`)
+		log.error(error);
+		process.exit(1);
+	};
+	return value;
+};