chore: add middleware for error handling

src/app.ts

@@ -2,6 +2,7 @@ import express from "express";
 
 import { unknownEndpointHandler } from "@/src/middleware/middleware";
 import { requestLogger } from "@/src/middleware/morgenMiddleware";
+import { errorHandler } from "@/src/middleware/errorHandler";
 
 import { apiRouter } from "@/src/routes/api";
 //import { testRouter } from "@/src/routes/test";
@@ -20,7 +21,7 @@ app.use(bodyParser.raw());
 app.use(express.json());
 app.use(bodyParser.text());
 app.use(requestLogger);
-//app.use(requestLogger);
+app.use(errorHandler);
 
 app.use("/api", apiRouter);
 //app.use("/test", testRouter);

src/middleware/errorHandler.ts

@@ -0,0 +1,14 @@
+import { NextFunction, Request, Response } from "express";
+import { logger } from "../utils/logger";
+
+export const errorHandler = (err: Error, req: Request, res: Response, _next: NextFunction): void => {
+    if (err.stack) {
+        const stackArr = err.stack.split("\n");
+        stackArr[0] += ` while processing ${req.path} request`;
+        logger.error(stackArr.join("\n"));
+        res.status(500).end();
+    } else {
+        logger.error(`uncaught error while processing ${req.path} request: ${err.message}`);
+        res.status(500).end();
+    }
+};